/* roulang page: index */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            margin-left: 3px;
            transition: transform var(--transition-fast);
        }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown:hover .nav-link .fa-chevron-down {
            transform: rotate(180deg);
        }

        .dropdown-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            min-width: 220px;
            padding: 12px 8px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-base);
            z-index: 1001;
        }

        .nav-dropdown:hover .dropdown-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }

        .dropdown-panel a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .dropdown-panel a:hover {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .dropdown-panel a i {
            width: 20px;
            text-align: center;
            color: var(--accent);
            font-size: 0.85rem;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-search-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .btn-search-icon:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        .btn-header-primary {
            padding: 10px 18px;
            background: var(--accent);
            color: #0D1117;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .btn-header-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px var(--accent-glow);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-primary);
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .mobile-menu {
            display: none;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            z-index: 999;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
            box-shadow: var(--shadow-lg);
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 16px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .mobile-menu .nav-link:hover {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .mobile-menu .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        /* Hero - Resource Download Station Style */
        .hero-section {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            padding: 80px 0;
            background: var(--bg-main);
            overflow: hidden;
        }

        .hero-bg-image {
            position: absolute;
            inset: 0;
            z-index: 0;
            opacity: 0.3;
            pointer-events: none;
        }

        .hero-bg-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: saturate(0.6) brightness(0.5) contrast(1.1);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(13, 17, 23, 0.65) 0%, rgba(13, 17, 23, 0.8) 40%, var(--bg-main) 100%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-dim);
            border: 1px solid rgba(61, 220, 132, 0.3);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }

        .hero-badge .pulse-dot {
            width: 7px;
            height: 7px;
            background: var(--accent);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.5);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(61, 220, 132, 0);
            }
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .hero-title .text-accent {
            color: var(--accent);
            position: relative;
            display: inline-block;
        }

        .hero-title .text-accent::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 8px;
            background: var(--accent-glow);
            border-radius: 4px;
            z-index: -1;
            opacity: 0.6;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 640px;
            margin: 0 auto 32px;
            text-align: center;
        }

        .hero-search-wrapper {
            max-width: 620px;
            margin: 0 auto 36px;
            position: relative;
        }

        .hero-search-box {
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            border-radius: 100px;
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-md);
        }

        .hero-search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px var(--accent-dim), var(--shadow-md);
        }

        .hero-search-box .search-icon {
            padding: 0 18px;
            color: var(--text-muted);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .hero-search-box input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1rem;
            padding: 16px 8px 16px 0;
            outline: none;
            min-width: 0;
        }

        .hero-search-box input::placeholder {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .hero-search-box .btn-search {
            background: var(--accent);
            color: #0D1117;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            margin: 4px;
            border-radius: 100px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .hero-search-box .btn-search:hover {
            background: var(--accent-hover);
            transform: translateX(-1px);
        }

        .hero-quick-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 8px;
        }

        .hero-quick-tags .tag-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            border-radius: 100px;
            color: var(--text-secondary);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }

        .hero-quick-tags .tag-link:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        .hero-quick-tags .tag-link .tag-count {
            font-size: 0.7rem;
            color: var(--text-muted);
            background: rgba(0, 0, 0, 0.3);
            padding: 1px 8px;
            border-radius: 100px;
            font-family: var(--font-mono);
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .btn-hero-primary {
            padding: 14px 32px;
            background: var(--accent);
            color: #0D1117;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 100px;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 20px var(--accent-glow);
        }

        .btn-hero-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            transform: translateY(-2px);
            box-shadow: 0 6px 28px var(--accent-glow);
        }

        .btn-hero-secondary {
            padding: 14px 28px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            border-radius: 100px;
            border: 1.5px solid var(--border-color);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-hero-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
            transform: translateY(-2px);
        }

        /* Section Base */
        .section-block {
            padding: var(--spacing-section) 0;
            position: relative;
        }

        .section-block .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
        }

        .section-block .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-block .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-block .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin-bottom: 40px;
        }

        .section-block.bg-alternate {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-block.bg-dark-accent {
            background: linear-gradient(180deg, var(--bg-main) 0%, #0F1B16 50%, var(--bg-main) 100%);
        }

        .section-block .section-header-center {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 48px;
        }

        .section-block .section-header-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Cards */
        .card-generic {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .card-generic:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 18px;
            transition: all var(--transition-base);
        }

        .card-generic:hover .card-icon {
            background: var(--accent);
            color: #0D1117;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .card-generic .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .card-generic .card-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .card-generic .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            margin-top: 16px;
            transition: all var(--transition-fast);
        }

        .card-generic .card-link:hover {
            gap: 10px;
            color: var(--accent-hover);
        }

        .card-generic.card-with-image {
            padding: 0;
            overflow: hidden;
        }

        .card-generic.card-with-image .card-image-wrap {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #0a0e14;
            position: relative;
        }

        .card-generic.card-with-image .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .card-generic.card-with-image:hover .card-image-wrap img {
            transform: scale(1.06);
        }

        .card-generic.card-with-image .card-body {
            padding: 24px;
        }

        .card-tag {
            display: inline-block;
            padding: 3px 10px;
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 100px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .card-tag.warm {
            background: rgba(255, 180, 84, 0.14);
            color: var(--warm);
        }

        .card-date {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
            letter-spacing: 0.3px;
        }

        /* Service Matrix Grid */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        /* Data Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .stat-card:hover {
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            font-family: var(--font-mono);
            color: var(--accent);
            letter-spacing: -1px;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .stat-unit {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--accent);
            margin-left: 2px;
        }

        /* Process Steps */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 42px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 8px;
        }

        .process-step .step-indicator {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            font-family: var(--font-mono);
            margin: 0 auto 16px;
            transition: all var(--transition-base);
            position: relative;
            z-index: 2;
        }

        .process-step:hover .step-indicator {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .process-step .step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .process-step .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Case Wall */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        /* News List */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .news-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            transition: all var(--transition-base);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .news-item:hover {
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }

        .news-item .news-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-item .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-item .news-summary {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Topic Cards */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .topic-card:hover {
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .topic-card .topic-image {
            aspect-ratio: 3 / 2;
            overflow: hidden;
            background: #0a0e14;
        }

        .topic-card .topic-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .topic-card:hover .topic-image img {
            transform: scale(1.05);
        }

        .topic-card .topic-body {
            padding: 18px 20px;
        }

        .topic-card .topic-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .topic-card .topic-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Partner Logo Wall */
        .partner-wall {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .partner-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 600;
            transition: all var(--transition-base);
            min-height: 72px;
            letter-spacing: 0.5px;
        }

        .partner-item:hover {
            border-color: var(--border-color);
            color: var(--text-secondary);
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }

        .partner-item .partner-icon {
            font-size: 1.5rem;
            margin-right: 8px;
            color: var(--text-secondary);
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(61, 220, 132, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
            user-select: none;
            gap: 12px;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question .faq-toggle-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-item.active .faq-toggle-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-bottom: 18px;
        }

        /* Guarantee Strip */
        .guarantee-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .guarantee-item:hover {
            border-color: rgba(61, 220, 132, 0.25);
            box-shadow: var(--shadow-sm);
        }

        .guarantee-item .guarantee-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }

        .guarantee-item .guarantee-text {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .guarantee-item .guarantee-sub {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* Contact / CTA */
        .contact-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .contact-info {
            padding-right: 20px;
        }

        .contact-info .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .contact-info .contact-item i {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .contact-form {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-md);
        }

        .contact-form .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .contact-form .form-group {
            margin-bottom: 16px;
        }

        .contact-form label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            background: var(--bg-main);
            border: 1.5px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            outline: none;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-dim);
        }

        .contact-form textarea {
            resize: vertical;
            min-height: 100px;
        }

        .btn-form-submit {
            width: 100%;
            padding: 14px 28px;
            background: var(--accent);
            color: #0D1117;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
        }

        .btn-form-submit:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 20px var(--accent-glow);
        }

        /* Footer */
        .site-footer {
            background: #080B10;
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand .logo-brand {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

        .footer-brand .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col .footer-link {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: all var(--transition-fast);
        }

        .footer-col .footer-link:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            text-align: center;
        }

        .footer-bottom .copyright {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-bottom .footer-links a {
            font-size: 0.82rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }

        /* Decorative Elements */
        .speed-lines {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
        }

        .speed-line {
            position: absolute;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(61, 220, 132, 0.3), transparent);
            width: 30%;
            animation: speed-line-move 4s ease-in-out infinite;
        }

        .speed-line:nth-child(1) {
            top: 15%;
            left: -10%;
            animation-delay: 0s;
        }
        .speed-line:nth-child(2) {
            top: 35%;
            left: -10%;
            animation-delay: 1.2s;
            width: 40%;
        }
        .speed-line:nth-child(3) {
            top: 55%;
            left: -10%;
            animation-delay: 2.4s;
            width: 25%;
        }
        .speed-line:nth-child(4) {
            top: 75%;
            left: -10%;
            animation-delay: 0.6s;
            width: 45%;
        }

        @keyframes speed-line-move {
            0% {
                transform: translateX(0);
                opacity: 0;
            }
            20% {
                opacity: 1;
            }
            80% {
                opacity: 1;
            }
            100% {
                transform: translateX(120vw);
                opacity: 0;
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
            .process-steps::before {
                display: none;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .partner-wall {
                grid-template-columns: repeat(3, 1fr);
            }
            .guarantee-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .hero-title {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-actions .btn-header-primary {
                display: none;
            }
            .hero-section {
                min-height: auto;
                padding: 56px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 0.98rem;
            }
            .section-block {
                padding: var(--spacing-section-mobile) 0;
            }
            .section-block .section-title {
                font-size: 1.7rem;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .partner-wall {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-strip {
                grid-template-columns: 1fr;
            }
            .contact-form {
                padding: 20px;
            }
            .contact-form .form-row {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero-search-box {
                flex-direction: column;
                border-radius: var(--radius-md);
                overflow: hidden;
            }
            .hero-search-box .search-icon {
                display: none;
            }
            .hero-search-box input {
                width: 100%;
                padding: 14px 18px;
            }
            .hero-search-box .btn-search {
                width: 100%;
                margin: 0;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
                max-width: 320px;
                margin: 0 auto;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .section-block .section-title {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .partner-wall {
                grid-template-columns: 1fr 1fr;
            }
            .partner-item {
                font-size: 0.78rem;
                padding: 14px 8px;
            }
            .container-custom {
                padding: 0 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .card-generic {
                padding: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            margin-left: 3px;
            transition: transform var(--transition-fast);
        }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown:hover .nav-link .fa-chevron-down {
            transform: rotate(180deg);
        }

        .nav-dropdown-menu {
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            min-width: 200px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-6px);
            transition: all var(--transition-base);
            z-index: 100;
            padding: 8px;
        }

        .nav-dropdown:hover .nav-dropdown-menu,
        .nav-dropdown:focus-within .nav-dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-dropdown-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            transition: all var(--transition-fast);
        }

        .nav-dropdown-menu a:hover {
            background: var(--accent-dim);
            color: var(--text-primary);
        }

        .nav-search {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            width: 150px;
            transition: all var(--transition-fast);
        }

        .nav-search:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-dim);
            color: var(--text-primary);
            width: 180px;
        }

        .nav-toggle {
            display: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 8px;
            line-height: 1;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 24px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .current {
            color: var(--accent);
        }

        .breadcrumb i {
            font-size: 0.6rem;
            color: var(--text-muted);
        }

        /* Category Page Header */
        .category-hero {
            background:
                radial-gradient(circle at 80% 20%, rgba(61, 220, 132, 0.12), transparent 40%),
                radial-gradient(circle at 10% 80%, rgba(255, 180, 84, 0.08), transparent 35%),
                var(--bg-secondary);
            border-bottom: 1px solid var(--border-light);
            padding: 56px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 260px;
            height: 260px;
            border: 1px solid rgba(61, 220, 132, 0.18);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            left: 10%;
            bottom: -140px;
            width: 220px;
            height: 220px;
            background: repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(61,220,132,0.06) 8px, rgba(61,220,132,0.06) 16px);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero-content {
            position: relative;
            z-index: 1;
        }

        .category-hero h1 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
            color: var(--text-primary);
        }

        .category-hero p {
            font-size: 1.08rem;
            color: var(--text-secondary);
            max-width: 760px;
            margin-bottom: 0;
            line-height: 1.8;
        }

        /* Section base */
        .page-section {
            padding: var(--spacing-section) 0;
        }

        .page-section.alt-bg {
            background: var(--bg-secondary);
        }

        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .section-heading h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 0;
            letter-spacing: 0.3px;
        }

        .section-heading .section-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .section-more {
            font-size: 0.9rem;
            font-weight: 500;
            white-space: nowrap;
        }

        .section-more i {
            margin-left: 4px;
            font-size: 0.8rem;
        }

        /* Category list cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .topic-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.35);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .topic-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }

        .topic-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.88;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .topic-card:hover .topic-card-img img {
            transform: scale(1.04);
            opacity: 1;
        }

        .topic-card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(13, 17, 23, 0.72);
            backdrop-filter: blur(8px);
            color: var(--accent);
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 500;
            border: 1px solid rgba(61,220,132,0.3);
        }

        .topic-card-body {
            padding: 20px 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .topic-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.5;
            color: var(--text-primary);
        }

        .topic-card-body p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .topic-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }

        .topic-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .topic-card-meta i {
            color: var(--accent);
            font-size: 0.75rem;
        }

        /* tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-cloud .tag-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            padding: 10px 16px;
            border-radius: 999px;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag-cloud .tag-item:hover {
            border-color: rgba(61, 220, 132, 0.45);
            color: var(--accent);
            background: var(--accent-dim);
        }

        /* sub-topics */
        .sub-topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .sub-topic-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all var(--transition-base);
            color: var(--text-secondary);
        }

        .sub-topic-item:hover {
            border-color: rgba(61, 220, 132, 0.4);
            background: var(--bg-card-hover);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        .sub-topic-item i {
            width: 36px;
            height: 36px;
            background: var(--accent-dim);
            color: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .sub-topic-item span {
            font-size: 0.95rem;
            font-weight: 500;
        }

        /* subscription CTA */
        .subscribe-cta {
            background:
                linear-gradient(135deg, rgba(61, 220, 132, 0.12), rgba(255, 180, 84, 0.1)),
                var(--bg-card);
            border: 1px solid rgba(61, 220, 132, 0.25);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .subscribe-cta h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .subscribe-cta p {
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        .subscribe-cta .btn-primary {
            flex-shrink: 0;
        }

        /* Buttons */
        .btn-primary {
            background: var(--accent);
            color: #0D1117;
            border-radius: var(--radius-sm);
            padding: 12px 20px;
            font-weight: 600;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all var(--transition-fast);
            box-shadow: 0 0 20px rgba(61, 220, 132, 0.2);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            box-shadow: 0 0 28px rgba(61, 220, 132, 0.38);
            transform: translateY(-1px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 11px 18px;
            font-weight: 500;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition-fast);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        /* footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .logo-brand {
            margin-bottom: 14px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col-title {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-link {
            display: block;
            color: var(--text-secondary);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: all var(--transition-fast);
        }

        .footer-link:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .copyright {
            color: var(--text-muted);
            font-size: 0.82rem;
            text-align: right;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .sub-topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .main-nav {
                gap: 2px;
            }
            .main-nav .nav-link {
                padding: 10px 8px;
                font-size: 0.85rem;
            }
            .nav-search {
                width: 120px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                align-items: flex-start;
                background: var(--bg-card);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 12px;
                width: 100%;
                box-shadow: var(--shadow-lg);
                position: absolute;
                top: calc(var(--header-height) - 4px);
                left: 0;
                right: 0;
                margin: 0 24px;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                border: none;
                background: rgba(255,255,255,0.02);
                margin-top: 4px;
                padding: 0 0 0 8px;
            }
            .nav-dropdown:hover .nav-dropdown-menu,
            .nav-dropdown:focus-within .nav-dropdown-menu {
                opacity: 1;
                visibility: visible;
                transform: none;
            }
            .nav-search {
                display: none;
            }
            .category-hero h1 {
                font-size: 1.9rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .sub-topic-grid {
                grid-template-columns: 1fr;
            }
            .section-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-section {
                padding: var(--spacing-section-mobile) 0;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 40px 0 32px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .subscribe-cta {
                padding: 24px 18px;
            }
            .subscribe-cta h2 {
                font-size: 1.3rem;
            }
            .container-custom {
                padding: 0 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .copyright {
                text-align: left;
            }
        }

/* roulang page: category1 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            margin-left: 3px;
            transition: transform var(--transition-fast);
        }

        .nav-item {
            position: relative;
        }

        .nav-item:hover .nav-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }

        .nav-dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 220px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 10px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: all var(--transition-base);
            pointer-events: none;
            z-index: 1050;
        }

        .nav-dropdown a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-dropdown a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-dropdown a i {
            width: 18px;
            text-align: center;
            color: var(--accent);
            font-size: 0.8rem;
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        /* Breadcrumb */
        .breadcrumb-area {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
        }

        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-inner a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb-inner a:hover {
            color: var(--accent);
        }

        .breadcrumb-inner .separator {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .breadcrumb-inner .current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Category Header */
        .category-header {
            background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-main) 100%);
            border-bottom: 1px solid var(--border-light);
            padding: 40px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, var(--accent-dim) 0%, transparent 65%);
            pointer-events: none;
        }

        .category-header::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 180, 84, 0.07) 0%, transparent 60%);
            pointer-events: none;
        }

        .category-header .container-custom {
            position: relative;
            z-index: 1;
        }

        .category-header h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .category-header .category-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Filter Bar */
        .filter-bar {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 32px;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
            white-space: nowrap;
            margin-right: 4px;
        }

        .filter-btn {
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            padding: 7px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-btn:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--border-light);
        }

        .filter-btn.active {
            color: #0D1117;
            background: var(--accent);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* Card List */
        .card-list-section {
            padding: 48px 0;
        }

        .list-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 24px;
        }

        .match-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .match-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .match-card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .match-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .match-card:hover .match-card-image img {
            transform: scale(1.04);
        }

        .match-card-image .game-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(8px);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
            border: 1px solid var(--border-light);
        }

        .match-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .match-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .match-card-summary {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 14px;
            flex: 1;
        }

        .match-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }

        .match-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .match-date i {
            font-size: 0.75rem;
        }

        .match-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .match-tags .item-tag {
            font-size: 0.75rem;
            color: var(--text-secondary);
            background: var(--bg-secondary);
            padding: 4px 10px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .match-tags .item-tag:hover {
            color: var(--accent);
            border-color: var(--accent-dim);
        }

        .load-more-wrap {
            display: flex;
            justify-content: center;
            margin-top: 36px;
        }

        .btn-load-more {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-dim);
            padding: 12px 28px;
            border-radius: 30px;
            border: 1px solid rgba(61, 220, 132, 0.2);
            transition: all var(--transition-base);
        }

        .btn-load-more:hover {
            color: #0D1117;
            background: var(--accent);
            border-color: var(--accent);
            transform: translateY(-1px);
        }

        /* Data Snapshot */
        .data-snapshot-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 56px 0;
        }

        .section-header {
            margin-bottom: 28px;
        }

        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }

        .section-header p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 18px;
        }

        .snapshot-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .snapshot-item:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .snapshot-value {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .snapshot-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Tags & Categories */
        .tags-section {
            padding: 56px 0 40px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }

        .tag-cloud .tag-item {
            font-size: 0.9rem;
            color: var(--text-secondary);
            background: var(--bg-card);
            padding: 8px 18px;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .tag-cloud .tag-item:hover {
            color: var(--accent);
            border-color: var(--accent-dim);
            background: var(--accent-dim);
            transform: translateY(-2px);
        }

        .sub-category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 16px;
            margin-top: 18px;
        }

        .sub-category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all var(--transition-base);
        }

        .sub-category-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .sub-category-icon {
            width: 36px;
            height: 36px;
            background: var(--accent-dim);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sub-category-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .sub-category-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* Subscribe CTA */
        .subscribe-section {
            padding: 48px 0 64px;
        }

        .subscribe-box {
            background: linear-gradient(135deg, var(--bg-card) 0%, #1a2b3a 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .subscribe-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--accent-dim) 0%, transparent 60%);
            pointer-events: none;
        }

        .subscribe-info {
            flex: 1;
            min-width: 260px;
            position: relative;
            z-index: 1;
        }

        .subscribe-info h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .subscribe-info p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            max-width: 500px;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            min-width: 280px;
            flex: 1;
            max-width: 420px;
            position: relative;
            z-index: 1;
        }

        .subscribe-form input {
            flex: 1;
            background: var(--bg-main);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 0.92rem;
            transition: border-color var(--transition-fast);
        }

        .subscribe-form input:focus {
            outline: none;
            border-color: var(--accent);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .btn-subscribe {
            background: var(--accent);
            color: #0D1117;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-base);
        }

        .btn-subscribe:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px var(--accent-glow);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border-light);
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-brand .logo-brand {
            font-size: 1.2rem;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 0.9rem;
            border-radius: 8px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 340px;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .footer-link {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-link:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-links a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .copyright {
            font-size: 0.82rem;
            color: var(--text-muted);
            text-align: right;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 2px;
            }

            .main-nav .nav-link {
                padding: 10px 10px;
                font-size: 0.85rem;
            }

            .list-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }

            .footer-inner {
                grid-template-columns: 1.5fr 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
                max-width: 600px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --spacing-section-mobile: 36px;
                --header-height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-main);
                border-bottom: 1px solid var(--border-light);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 16px 20px;
                max-height: 0;
                overflow: hidden;
                transition: max-height var(--transition-base);
                pointer-events: none;
                z-index: 999;
            }

            .main-nav.mobile-open {
                max-height: 70vh;
                overflow-y: auto;
                pointer-events: auto;
            }

            .main-nav .nav-link {
                width: 100%;
                padding: 14px 10px;
                font-size: 1rem;
                border-bottom: 1px solid var(--border-light);
                border-radius: 0;
            }

            .main-nav .nav-link:last-child {
                border-bottom: none;
            }

            .main-nav .nav-link.active {
                background: transparent;
                border-left: 3px solid var(--accent);
                padding-left: 14px;
            }

            .nav-dropdown {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                border: none;
                padding: 0 0 8px 20px;
                display: none;
                min-width: auto;
            }

            .nav-item.mobile-dropdown-open .nav-dropdown {
                display: block;
            }

            .nav-item.mobile-dropdown-open .fa-chevron-down {
                transform: rotate(180deg);
            }

            .category-header h1 {
                font-size: 2rem;
            }

            .filter-bar {
                padding: 12px 14px;
            }

            .list-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .snapshot-value {
                font-size: 1.5rem;
            }

            .subscribe-box {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .subscribe-form {
                width: 100%;
                max-width: 100%;
                flex-direction: column;
            }

            .subscribe-form input {
                width: 100%;
            }

            .btn-subscribe {
                width: 100%;
                text-align: center;
                justify-content: center;
            }

            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .copyright {
                text-align: left;
                font-size: 0.78rem;
                line-height: 1.6;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }

            .category-header {
                padding: 28px 0 32px;
            }

            .category-header h1 {
                font-size: 1.7rem;
            }

            .category-header .category-desc {
                font-size: 0.95rem;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }

            .snapshot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .snapshot-item {
                padding: 16px;
            }

            .sub-category-grid {
                grid-template-columns: 1fr;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .footer-brand {
                grid-column: auto;
            }
        }

/* roulang page: category3 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 64px;
            --spacing-section-mobile: 44px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 3px;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            margin-left: 3px;
            transition: transform var(--transition-fast);
        }

        .nav-dropdown {
            position: relative;
        }

        .dropdown-menu {
            position: absolute;
            top: calc(100% + 4px);
            left: 0;
            min-width: 200px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 10px;
            display: none;
            flex-direction: column;
            gap: 4px;
            box-shadow: var(--shadow-md);
            z-index: 1001;
        }

        .nav-dropdown:hover .dropdown-menu,
        .nav-dropdown:focus-within .dropdown-menu {
            display: flex;
        }

        .nav-dropdown:hover .nav-link .fa-chevron-down {
            transform: rotate(180deg);
        }

        .dropdown-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 9px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .dropdown-menu a:hover {
            background: var(--accent-dim);
            color: var(--accent);
        }

        .dropdown-menu a i {
            width: 18px;
            text-align: center;
            color: var(--accent);
            font-size: 0.82rem;
        }

        .mobile-menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-size: 1.25rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Category Compact Header */
        .category-header {
            background: linear-gradient(135deg, #0F171E 0%, #152029 40%, #0D1117 100%);
            border-bottom: 1px solid var(--border-light);
            padding: 48px 0 36px;
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/05f6f2cb6648577c.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
            z-index: 0;
        }

        .category-header::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent) 0%, rgba(61, 220, 132, 0.3) 50%, transparent 100%);
            z-index: 1;
        }

        .category-header .container-custom {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--border-color);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        .category-header h1 {
            font-size: 2.6rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            color: var(--text-primary);
        }

        .category-header .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
        }

        .category-header .header-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 16px;
            flex-wrap: wrap;
        }

        .category-header .header-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .category-header .header-meta i {
            color: var(--accent);
            font-size: 0.85rem;
        }

        /* Sections */
        .content-section {
            padding: var(--spacing-section) 0;
        }

        .content-section.alt-bg {
            background: var(--bg-secondary);
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }

        .section-header h2 {
            font-size: 1.85rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0;
        }

        .section-header .section-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 620px;
            line-height: 1.7;
        }

        .section-header .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            white-space: nowrap;
        }

        /* Guide List */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 28px;
            flex-wrap: wrap;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .filter-bar .filter-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-right: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .filter-chip:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-dim);
        }

        .filter-chip.active-filter {
            background: var(--accent-dim);
            border-color: var(--accent);
            color: var(--accent);
        }

        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-md);
        }

        .guide-card .card-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-secondary);
        }

        .guide-card .card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
            gap: 10px;
        }

        .guide-card .card-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .guide-card .tag-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--accent-dim);
            color: var(--accent);
            letter-spacing: 0.3px;
        }

        .guide-card .tag-badge.warm-tag {
            background: rgba(255, 180, 84, 0.15);
            color: var(--warm);
        }

        .guide-card h3 {
            font-size: 1.15rem;
            font-weight: 650;
            line-height: 1.45;
            margin: 0;
        }

        .guide-card h3 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .guide-card h3 a:hover {
            color: var(--accent);
        }

        .guide-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .guide-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }

        .guide-card .post-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .guide-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .list-more {
            display: flex;
            justify-content: center;
            margin-top: 40px;
        }

        /* Tag & Subcategory Section */
        .tag-subcategory-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .tag-panel {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border-light);
        }

        .tag-panel h3 {
            font-size: 1.15rem;
            font-weight: 650;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-primary);
        }

        .tag-panel h3 i {
            color: var(--accent);
            font-size: 1rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud .tag-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--bg-secondary);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }

        .tag-cloud .tag-link:hover {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent);
        }

        .subcategory-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .subcategory-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .subcategory-list a:hover {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent);
            transform: translateX(4px);
        }

        .subcategory-list a i:first-child {
            color: var(--accent);
            width: 22px;
            text-align: center;
        }

        .subcategory-list a .fa-arrow-right {
            font-size: 0.8rem;
            opacity: 0.6;
        }

        /* Ranking Section */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 860px;
            margin: 0 auto;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }

        .ranking-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
            transform: translateX(4px);
        }

        .ranking-number {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 10px;
            background: var(--bg-secondary);
            color: var(--text-muted);
            border: 1px solid var(--border-light);
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .ranking-item:nth-child(1) .ranking-number {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent);
            box-shadow: 0 0 16px var(--accent-glow);
        }

        .ranking-item:nth-child(2) .ranking-number {
            background: rgba(255, 180, 84, 0.14);
            color: var(--warm);
            border-color: rgba(255, 180, 84, 0.4);
        }

        .ranking-item:nth-child(3) .ranking-number {
            background: rgba(184, 196, 206, 0.12);
            color: var(--text-secondary);
            border-color: rgba(184, 196, 206, 0.3);
        }

        .ranking-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text-primary);
        }

        .ranking-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        .ranking-info .rank-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 4px;
            background: var(--accent-dim);
            color: var(--accent);
            margin-left: 8px;
            vertical-align: middle;
        }

        /* Version Guide Section */
        .version-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .version-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 26px 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .version-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .version-card .version-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 1.25rem;
            margin-bottom: 4px;
        }

        .version-card h4 {
            font-size: 1.08rem;
            font-weight: 650;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.45;
        }

        .version-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .version-card .version-link {
            font-size: 0.88rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            align-self: flex-start;
        }

        /* Topic Collection */
        .topic-collection {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }

        .topic-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
            box-shadow: var(--shadow-sm);
        }

        .topic-card .topic-cover {
            width: 64px;
            height: 64px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .topic-card .topic-info h4 {
            font-size: 0.98rem;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text-primary);
        }

        .topic-card .topic-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.55;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #0F1D16 0%, #132920 50%, #0D1117 100%);
            border-top: 1px solid rgba(61, 220, 132, 0.2);
            border-bottom: 1px solid var(--border-light);
            padding: var(--spacing-section) 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(61, 220, 132, 0.08) 0%, transparent 65%);
            pointer-events: none;
        }

        .cta-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-text h2 {
            font-size: 1.85rem;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .cta-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 10px;
        }

        .cta-form input[type="email"] {
            min-width: 260px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            background: var(--bg-main);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            font-size: 0.92rem;
            transition: border-color var(--transition-fast);
            outline: none;
        }

        .cta-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }

        .cta-form input[type="email"]:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(61, 220, 132, 0.15);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 650;
            background: var(--accent);
            color: #0D1117;
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
            border: 2px solid transparent;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px var(--accent-glow);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 650;
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: var(--accent-dim);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 28px;
            color: var(--text-secondary);
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .logo-brand {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 0.9rem;
            border-radius: 8px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h3 {
            font-size: 0.95rem;
            font-weight: 650;
            color: var(--text-primary);
            margin: 0 0 14px;
            letter-spacing: 0.3px;
        }

        .footer-col .footer-link {
            display: block;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: all var(--transition-fast);
        }

        .footer-col .footer-link:hover {
            color: var(--accent);
            transform: translateX(3px);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
        }

        .footer-links a {
            color: var(--text-muted);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .copyright {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.7;
            text-align: right;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .version-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-collection {
                grid-template-columns: repeat(2, 1fr);
            }
            .main-nav .nav-link {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
                --spacing-section-mobile: 36px;
                --header-height: 64px;
            }
            .header-inner {
                gap: 12px;
            }
            .main-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 17, 23, 0.98);
                border-bottom: 1px solid var(--border-light);
                padding: 16px 24px 24px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
                z-index: 999;
            }
            .main-nav.menu-open {
                display: flex;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-dropdown {
                position: static;
            }
            .nav-dropdown .dropdown-menu {
                position: static;
                display: none;
                min-width: 100%;
                background: var(--bg-secondary);
                border: none;
                padding-left: 16px;
                margin-top: 4px;
            }
            .nav-dropdown.menu-item-open .dropdown-menu {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 12px 14px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: flex-start;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .category-header h1 {
                font-size: 2rem;
            }
            .tag-subcategory-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .copyright {
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .version-grid {
                grid-template-columns: 1fr;
            }
            .topic-collection {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .category-header h1 {
                font-size: 1.65rem;
            }
            .cta-form {
                flex-direction: column;
                width: 100%;
            }
            .cta-form input[type="email"] {
                min-width: 100%;
                width: 100%;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 72px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-hover);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
        }
        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-brand:hover {
            color: var(--text-primary);
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            flex: 1;
            justify-content: center;
        }
        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 13px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }
        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            transition: transform var(--transition-fast);
        }
        .nav-item {
            position: relative;
        }
        .nav-item:hover .dropdown-panel,
        .nav-item:focus-within .dropdown-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(2px);
            pointer-events: auto;
        }
        .nav-item:hover .fa-chevron-down {
            transform: rotate(180deg);
        }
        .dropdown-panel {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 200px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-6px);
            transition: all var(--transition-base);
            pointer-events: none;
            z-index: 99;
        }
        .dropdown-panel a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 18px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: all var(--transition-fast);
            border-radius: 0;
        }
        .dropdown-panel a i {
            width: 18px;
            text-align: center;
            color: var(--accent);
            font-size: 0.85rem;
        }
        .dropdown-panel a:hover {
            background: var(--accent-dim);
            color: var(--text-primary);
        }
        .mobile-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 1.3rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            border: 1px solid var(--border-color);
        }
        .mobile-toggle:hover {
            background: var(--accent);
            color: #0D1117;
        }

        /* Section base */
        section {
            padding: var(--spacing-section) 0;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 1.85rem;
            font-weight: 700;
            margin: 0 0 12px 0;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .section-header .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-dim);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        /* Hero band */
        .page-hero-band {
            background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-main) 100%);
            border-bottom: 1px solid var(--border-light);
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .page-hero-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/4a91b94b7ef94556.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.16;
            pointer-events: none;
        }
        .page-hero-band::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent 60%);
        }
        .page-hero-band .container-custom {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--accent);
        }
        .page-hero-band h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            letter-spacing: 1px;
        }
        .page-hero-band .hero-desc {
            font-size: 1.08rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0;
            line-height: 1.8;
        }
        .hero-stats-mini {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: 20px;
        }
        .hero-stats-mini .stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .hero-stats-mini .stat-item i {
            color: var(--accent);
            font-size: 1rem;
        }

        /* Article cards */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }
        .article-card:hover {
            transform: translateY(-4px);
            border-color: rgba(61, 220, 132, 0.35);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .article-thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
            position: relative;
        }
        .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-thumb img {
            transform: scale(1.04);
        }
        .article-thumb .badge-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(6px);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 16px;
            letter-spacing: 0.5px;
            border: 1px solid rgba(61, 220, 132, 0.25);
        }
        .article-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0 0 8px 0;
            line-height: 1.5;
            color: var(--text-primary);
        }
        .article-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .article-body h3 a:hover {
            color: var(--accent);
        }
        .article-body .article-excerpt {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0 0 14px 0;
            line-height: 1.7;
            flex: 1;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }
        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .date i {
            color: var(--text-muted);
            font-size: 0.75rem;
        }
        .article-meta .read-link {
            font-weight: 600;
            font-size: 0.8rem;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 5px;
            transition: all var(--transition-fast);
        }
        .article-meta .read-link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .article-meta .read-link:hover i {
            transform: translateX(3px);
        }

        /* Load more */
        .load-more-wrap {
            text-align: center;
            margin-top: 36px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.92rem;
            transition: all var(--transition-fast);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--accent-dim);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* Category entrance */
        .category-entrance-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 16px;
        }
        .subcat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 16px;
            text-align: center;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            cursor: pointer;
        }
        .subcat-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.35);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        .subcat-card i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .subcat-card .subcat-name {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        .subcat-card .subcat-count {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Parameter comparison */
        .param-table-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow-x: auto;
            box-shadow: var(--shadow-sm);
        }
        .param-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 640px;
        }
        .param-table th,
        .param-table td {
            padding: 14px 18px;
            text-align: left;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .param-table th {
            background: var(--bg-secondary);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.5px;
        }
        .param-table tbody tr:hover {
            background: rgba(61, 220, 132, 0.04);
        }
        .param-table .highlight-best {
            color: var(--accent);
            font-weight: 700;
        }
        .param-table .param-name {
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .param-table .param-name i {
            color: var(--warm);
            font-size: 0.9rem;
        }

        /* Steps */
        .steps-horizontal {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: all var(--transition-base);
            position: relative;
        }
        .step-card:hover {
            border-color: rgba(61, 220, 132, 0.3);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent-dim);
            border-radius: 50%;
            color: var(--accent);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 12px;
            font-family: var(--font-mono);
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .step-card .step-icon {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 1.4rem;
            color: var(--border-color);
            transition: color var(--transition-fast);
        }
        .step-card:hover .step-icon {
            color: var(--accent);
        }

        /* Subscribe CTA */
        .cta-subscribe {
            background: linear-gradient(160deg, #122A1E 0%, var(--bg-secondary) 100%);
            border: 1px solid rgba(61, 220, 132, 0.2);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 16px;
        }
        .cta-subscribe h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
        }
        .cta-subscribe p {
            font-size: 1rem;
            color: var(--text-secondary);
            margin: 0;
            max-width: 560px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            width: 100%;
            max-width: 480px;
        }
        .subscribe-form input[type="email"] {
            flex: 1;
            min-width: 220px;
            padding: 13px 18px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background: var(--bg-main);
            color: var(--text-primary);
            font-size: 0.92rem;
            transition: border-color var(--transition-fast);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--accent);
            outline: none;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 26px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #0D1117;
            font-weight: 700;
            font-size: 0.92rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px var(--accent-glow);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand .logo-brand {
            font-size: 1.3rem;
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }
        .footer-col-title {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.6px;
            text-transform: uppercase;
            margin: 0 0 16px 0;
        }
        .footer-link {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .footer-link:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.82rem;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .copyright {
            text-align: right;
            line-height: 1.8;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 52px;
                --header-height: 60px;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-main);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                padding: 12px 20px;
                gap: 2px;
                z-index: 99;
            }
            .main-nav.mobile-open {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 12px 14px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: flex-start;
            }
            .nav-item {
                width: 100%;
            }
            .dropdown-panel {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                pointer-events: auto;
                box-shadow: none;
                background: transparent;
                border: none;
                padding: 2px 0 6px 28px;
            }
            .dropdown-panel a {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
            .mobile-toggle {
                display: flex;
            }
            .page-hero-band h1 {
                font-size: 1.85rem;
            }
            .page-hero-band .hero-desc {
                font-size: 0.98rem;
            }
            .hero-stats-mini {
                gap: 16px;
                flex-wrap: wrap;
            }
            .category-entrance-grid {
                grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            }
            .steps-horizontal {
                grid-template-columns: 1fr;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .cta-subscribe {
                padding: 28px 20px;
            }
            .subscribe-form {
                flex-direction: column;
                align-items: stretch;
            }
            .subscribe-form input[type="email"] {
                min-width: auto;
                width: 100%;
            }
            .btn-primary {
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }
            .page-hero-band {
                padding: 32px 0 28px;
            }
            .page-hero-band h1 {
                font-size: 1.6rem;
                letter-spacing: 0.5px;
            }
            .section-header h2 {
                font-size: 1.45rem;
            }
            .article-body {
                padding: 14px 16px 16px;
            }
            .article-body h3 {
                font-size: 1.05rem;
            }
            .category-entrance-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .subcat-card {
                padding: 16px 12px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
            .copyright {
                text-align: left;
            }
            .param-table th,
            .param-table td {
                padding: 10px 12px;
                font-size: 0.82rem;
            }
        }

/* roulang page: category5 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            transition: transform var(--transition-fast);
        }

        .nav-group {
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-group:hover .nav-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }

        .nav-group:hover .nav-link .fa-chevron-down {
            transform: rotate(180deg);
        }

        .nav-dropdown {
            position: absolute;
            top: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            min-width: 200px;
            padding: 8px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-base);
            z-index: 1001;
        }

        .nav-dropdown a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-dropdown a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-dropdown a i {
            color: var(--accent);
            font-size: 0.82rem;
            width: 18px;
            text-align: center;
        }

        .mobile-nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-primary);
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-nav-toggle:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb-wrap a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb-wrap a:hover {
            color: var(--accent);
        }

        .breadcrumb-wrap .breadcrumb-sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        .breadcrumb-wrap .breadcrumb-current {
            color: var(--accent);
            font-weight: 500;
        }

        /* Category Banner (Compact strip header) */
        .category-banner {
            background: linear-gradient(135deg, rgba(13, 17, 23, 0.92) 0%, rgba(18, 24, 32, 0.88) 50%, rgba(13, 17, 23, 0.92) 100%), url('/assets/images/0b00aa871c1661e7.webp') center/cover no-repeat;
            min-height: 240px;
            display: flex;
            align-items: center;
            padding: 60px 0 48px;
            border-bottom: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
        }

        .category-banner-inner {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .category-banner h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.25;
            margin: 0;
            letter-spacing: 0.5px;
        }

        .category-banner .banner-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin: 0;
        }

        /* Section Common */
        .section-block {
            padding: var(--spacing-section) 0;
        }

        .section-block.section-alt {
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px;
            line-height: 1.35;
            letter-spacing: 0.3px;
        }

        .section-header .section-sub {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Stats Bar */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .stat-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-dim);
            box-shadow: var(--shadow-sm);
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* Sort/Filter Bar */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
        }

        .filter-bar .filter-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .filter-bar .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-tag {
            padding: 6px 14px;
            border-radius: 20px;
            background: var(--bg-secondary);
            color: var(--text-secondary);
            font-size: 0.82rem;
            border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-tag:hover {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent-dim);
        }

        .filter-tag.active {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent-dim);
        }

        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-sort select {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .filter-sort select:hover {
            border-color: var(--accent);
        }

        /* Article Cards */
        .article-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-dim);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .article-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-img img {
            transform: scale(1.05);
        }

        .article-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .article-tag {
            padding: 3px 10px;
            border-radius: 12px;
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 500;
            white-space: nowrap;
        }

        .article-card-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .article-card-body:hover .article-card-title {
            color: var(--accent);
        }

        .article-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Load More */
        .load-more-wrap {
            display: flex;
            justify-content: center;
            margin-top: 36px;
        }

        .btn-primary {
            background: var(--accent);
            color: #0D1117;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #0D1117;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px var(--accent-glow);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-secondary);
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid var(--border-color);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            color: var(--accent);
            border-color: var(--accent-dim);
            background: var(--accent-dim);
        }

        /* Tags Section */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: flex-start;
        }

        .tag-chip {
            padding: 10px 18px;
            border-radius: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .tag-chip:hover {
            background: var(--accent-dim);
            border-color: var(--accent-dim);
            color: var(--accent);
            transform: translateY(-1px);
        }

        .tag-chip .tag-count {
            color: var(--text-muted);
            font-size: 0.78rem;
            margin-left: 4px;
        }

        /* Editor Picks */
        .editor-picks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .editor-pick-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .editor-pick-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-dim);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .editor-pick-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--accent-dim);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }

        .editor-pick-title {
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.45;
        }

        .editor-pick-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* Subscribe CTA */
        .subscribe-cta {
            background: linear-gradient(135deg, rgba(61, 220, 132, 0.08) 0%, rgba(13, 17, 23, 0.95) 50%, rgba(255, 180, 84, 0.06) 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .subscribe-cta::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: var(--accent-glow);
            filter: blur(80px);
            pointer-events: none;
        }

        .subscribe-info {
            flex: 1;
            min-width: 260px;
        }

        .subscribe-info h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .subscribe-info p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex: 1;
            min-width: 280px;
            max-width: 480px;
        }

        .subscribe-form input[type="email"] {
            flex: 1;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--accent);
            outline: none;
            box-shadow: 0 0 0 3px var(--accent-dim);
        }

        .subscribe-form button {
            background: var(--accent);
            color: #0D1117;
            border: none;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .subscribe-form button:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px var(--accent-glow);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 56px 0 28px;
            margin-top: 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px;
            letter-spacing: 0.5px;
        }

        .footer-link {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-link:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
        }

        .footer-links a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .copyright {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            text-align: right;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-secondary);
                border-bottom: 1px solid var(--border-light);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow-md);
                z-index: 999;
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav .nav-link {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .nav-group {
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
            }

            .nav-dropdown {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                width: 100%;
                min-width: auto;
                margin: 4px 0 8px;
                background: transparent;
                border: none;
                box-shadow: none;
                padding: 0 0 0 16px;
            }

            .nav-dropdown a {
                padding: 10px 16px;
            }

            .mobile-nav-toggle {
                display: flex;
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }

            .article-card-grid {
                grid-template-columns: 1fr;
            }

            .editor-picks-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --spacing-section-mobile: 40px;
            }

            .container-custom {
                padding: 0 16px;
            }

            .category-banner {
                min-height: 200px;
                padding: 40px 0 32px;
            }

            .category-banner h1 {
                font-size: 1.75rem;
            }

            .category-banner .banner-desc {
                font-size: 0.92rem;
            }

            .section-header h2 {
                font-size: 1.5rem;
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-item {
                padding: 16px 14px;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }

            .subscribe-cta {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .subscribe-form {
                width: 100%;
                max-width: 100%;
                flex-direction: column;
            }

            .subscribe-form input[type="email"] {
                width: 100%;
            }

            .subscribe-form button {
                width: 100%;
                justify-content: center;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .copyright {
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .category-banner h1 {
                font-size: 1.4rem;
            }

            .stats-bar {
                grid-template-columns: 1fr;
            }

            .article-card-body {
                padding: 16px 16px 18px;
            }

            .article-card-title {
                font-size: 1rem;
            }

            .tag-chip {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
        }

/* roulang page: category6 */
:root {
            --bg-main: #0D1117;
            --bg-secondary: #121820;
            --bg-card: #18212E;
            --bg-card-hover: #1D2A3A;
            --text-primary: #F2F5F7;
            --text-secondary: #B8C4CE;
            --text-muted: #7A8B9A;
            --accent: #3DDC84;
            --accent-hover: #50F095;
            --accent-dim: rgba(61, 220, 132, 0.14);
            --accent-glow: rgba(61, 220, 132, 0.35);
            --warm: #FFB454;
            --warm-hover: #FFC675;
            --warm-dim: rgba(255, 180, 84, 0.14);
            --border-color: #2A3745;
            --border-light: rgba(184, 196, 206, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.18);
            --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.28);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.38);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Roboto Mono', monospace;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            box-sizing: border-box;
        }

        *,
        *::before,
        *::after {
            box-sizing: inherit;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-hover);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 1rem;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-brand:hover {
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent) 0%, #1aa35a 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: #0D1117;
            flex-shrink: 0;
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .logo-icon i {
            filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .main-nav .nav-link {
            color: var(--text-secondary);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }

        .main-nav .nav-link .fa-chevron-down {
            font-size: 0.65rem;
            margin-left: 3px;
            transition: transform var(--transition-fast);
        }

        .nav-dropdown {
            position: relative;
        }

        .nav-dropdown:hover .dropdown-menu,
        .nav-dropdown:focus-within .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }

        .nav-dropdown:hover .fa-chevron-down,
        .nav-dropdown:focus-within .fa-chevron-down {
            transform: rotate(180deg);
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 200px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 8px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: all var(--transition-base);
            pointer-events: none;
            z-index: 1001;
        }

        .dropdown-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .dropdown-menu a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .dropdown-menu a i {
            color: var(--accent);
            font-size: 0.85rem;
            width: 16px;
            text-align: center;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Category Page Band Header */
        .category-band {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-light);
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .category-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/0b00aa871c1661e7.webp') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }

        .category-band::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 17, 23, 0.75) 0%, rgba(13, 17, 23, 0.95) 100%);
            pointer-events: none;
        }

        .category-band .container-custom {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        .category-band h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .category-band .band-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0;
            line-height: 1.8;
        }

        .category-band .band-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .category-band .band-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-dim);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid rgba(61, 220, 132, 0.2);
            letter-spacing: 0.3px;
        }

        .category-band .band-tag i {
            font-size: 0.7rem;
        }

        /* Filter Bar */
        .filter-bar {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
            position: sticky;
            top: var(--header-height);
            z-index: 100;
        }

        .filter-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .filter-bar .filter-label {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
            white-space: nowrap;
        }

        .filter-bar .filter-label i {
            color: var(--accent);
        }

        .filter-options {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-options .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-options .filter-chip:hover {
            border-color: var(--accent);
            color: var(--text-primary);
            background: var(--bg-card-hover);
        }

        .filter-options .filter-chip.active {
            background: var(--accent-dim);
            border-color: var(--accent);
            color: var(--accent);
        }

        .filter-sort {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-muted);
            font-size: 0.82rem;
            white-space: nowrap;
        }

        .filter-sort select {
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 7px 12px;
            font-size: 0.82rem;
            cursor: pointer;
            transition: border-color var(--transition-fast);
        }

        .filter-sort select:hover {
            border-color: var(--accent);
        }

        /* Resource Cards Section */
        .resource-list-section {
            padding: 48px 0 64px;
            background: var(--bg-main);
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .resource-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
            border-color: rgba(61, 220, 132, 0.3);
        }

        .resource-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .resource-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .resource-card:hover .card-image img {
            transform: scale(1.05);
        }

        .resource-card .card-image .image-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(6px);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 16px;
            letter-spacing: 0.5px;
            border: 1px solid rgba(61, 220, 132, 0.3);
        }

        .resource-card .card-body {
            padding: 20px 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .resource-card .card-meta .meta-tag {
            color: var(--accent);
            font-weight: 500;
        }

        .resource-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 10px;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .resource-card:hover .card-title {
            color: var(--accent);
        }

        .resource-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 16px;
            flex: 1;
        }

        .resource-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        .resource-card .card-link {
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
        }

        .resource-card .card-link:hover {
            color: var(--accent-hover);
            gap: 10px;
        }

        .resource-card .card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* Load More */
        .pagination-wrapper {
            margin-top: 40px;
            display: flex;
            justify-content: center;
        }

        .btn-load-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-card);
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 12px 32px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .btn-load-more:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-load-more i {
            font-size: 0.8rem;
        }

        /* Tag Aggregate Section */
        .tag-section {
            padding: 56px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .tag-section .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .tag-section .section-heading h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .tag-section .section-heading h2 i {
            color: var(--accent);
            font-size: 1.2rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-cloud .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .tag-cloud .tag-item:hover {
            background: var(--accent-dim);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(61, 220, 132, 0.15);
        }

        .tag-cloud .tag-item i {
            font-size: 0.7rem;
            color: var(--warm);
        }

        .tag-cloud .tag-item .tag-count {
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 8px;
            border-radius: 12px;
            font-size: 0.72rem;
            color: var(--text-muted);
        }

        /* Channel Entry Section */
        .channel-entry-section {
            padding: 56px 0;
            background: var(--bg-main);
        }

        .channel-entry-section .section-heading {
            margin-bottom: 28px;
        }

        .channel-entry-section .section-heading h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .channel-entry-section .section-heading h2 i {
            color: var(--warm);
            font-size: 1.2rem;
        }

        .channel-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .channel-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .channel-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }

        .channel-card .channel-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            background: var(--accent-dim);
            color: var(--accent);
        }

        .channel-card .channel-name {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }

        .channel-card .channel-desc {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Resource Highlight Stats */
        .resource-stats-section {
            padding: 56px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
        }

        .stat-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 1px;
            margin-bottom: 6px;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        /* Subscribe CTA */
        .subscribe-section {
            padding: 64px 0;
            background: var(--bg-main);
            border-top: 1px solid var(--border-light);
        }

        .subscribe-box {
            background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-hover) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .subscribe-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: var(--accent-glow);
            opacity: 0.12;
            pointer-events: none;
        }

        .subscribe-box .subscribe-content {
            flex: 1;
            min-width: 260px;
            position: relative;
            z-index: 1;
        }

        .subscribe-box .subscribe-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .subscribe-box .subscribe-content h2 i {
            color: var(--warm);
        }

        .subscribe-box .subscribe-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
            position: relative;
            z-index: 1;
            min-width: 280px;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background: var(--bg-main);
            color: var(--text-primary);
            font-size: 0.92rem;
            transition: all var(--transition-fast);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-dim);
            outline: none;
        }

        .btn-subscribe {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0D1117;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
            letter-spacing: 0.3px;
        }

        .btn-subscribe:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px var(--accent-glow);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            padding: 56px 0 32px;
            margin-top: 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo-brand {
            font-size: 1.25rem;
            margin-bottom: 14px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 8px;
            max-width: 320px;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        .footer-link {
            display: block;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 10px;
            transition: all var(--transition-fast);
        }

        .footer-link:hover {
            color: var(--accent);
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
        }

        .footer-links a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .copyright {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .channel-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --spacing-section-mobile: 36px;
                --header-height: 62px;
            }

            .header-inner {
                gap: 12px;
            }

            .nav-toggle {
                display: flex;
                flex-shrink: 0;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                right: 0;
                width: 280px;
                max-width: 85vw;
                height: calc(100vh - var(--header-height));
                background: var(--bg-secondary);
                border-left: 1px solid var(--border-color);
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                gap: 2px;
                padding: 20px 16px;
                transform: translateX(100%);
                transition: transform var(--transition-base);
                z-index: 999;
                overflow-y: auto;
            }

            .main-nav.mobile-open {
                transform: translateX(0);
                box-shadow: var(--shadow-lg);
            }

            .main-nav .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                justify-content: space-between;
            }

            .nav-dropdown {
                width: 100%;
            }

            .dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                border: none;
                padding: 4px 0 4px 16px;
                background: transparent;
                min-width: auto;
                pointer-events: auto;
                display: none;
            }

            .nav-dropdown.mobile-expanded .dropdown-menu {
                display: block;
            }

            .dropdown-menu a {
                padding: 8px 14px;
                font-size: 0.85rem;
            }

            .category-band {
                padding: 32px 0 28px;
            }

            .category-band h1 {
                font-size: 1.8rem;
            }

            .category-band .band-desc {
                font-size: 0.95rem;
            }

            .resource-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .channel-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 1.7rem;
            }

            .subscribe-box {
                padding: 32px 24px;
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }

            .subscribe-box .subscribe-content h2 {
                justify-content: center;
            }

            .subscribe-form {
                flex-direction: column;
                min-width: auto;
            }

            .subscribe-form input {
                min-width: auto;
                width: 100%;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }

            .category-band h1 {
                font-size: 1.5rem;
            }

            .category-band .band-desc {
                font-size: 0.88rem;
            }

            .filter-bar-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .channel-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .subscribe-box {
                padding: 24px 16px;
            }

            .subscribe-box .subscribe-content h2 {
                font-size: 1.25rem;
            }

            .tag-cloud .tag-item {
                padding: 7px 14px;
                font-size: 0.78rem;
            }
        }