/* roulang page: index */
:root {
            --bg-deep: #0a0f1d;
            --bg-sub: #0d172e;
            --card-glass: rgba(19, 29, 53, 0.72);
            --accent-amber: #F5A623;
            --accent-gold: #FFC837;
            --tech-cyan: #00D2FF;
            --tech-blue: #3A7BD5;
            --text-main: #FFFFFF;
            --text-muted: #A0AEC0;
            --text-sub: #64748B;
            --border-glow: rgba(0, 210, 255, 0.2);
            --border-amber: rgba(245, 166, 35, 0.35);
            --radius-main: 14px;
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        /* Reset & Base */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-deep);
            background-image: 
                radial-gradient(circle at 15% 20%, rgba(0, 210, 255, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 85% 65%, rgba(245, 166, 35, 0.06) 0%, transparent 45%),
                radial-gradient(circle at 50% 90%, rgba(58, 123, 213, 0.1) 0%, transparent 50%);
            background-attachment: fixed;
            color: var(--text-main);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }

        /* Typography */
        h1, h2, h3, h4, h5 {
            color: var(--text-main);
            font-weight: 700;
            letter-spacing: -0.5px;
        }
        .text-cyan { color: var(--tech-cyan) !important; }
        .text-amber { color: var(--accent-gold) !important; }
        .text-muted-custom { color: var(--text-muted) !important; }

        /* Global Header & Search Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(10, 15, 29, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 210, 255, 0.18);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .brand-logo {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-gold) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .brand-logo i {
            color: var(--accent-amber);
            font-size: 1.35rem;
            filter: drop-shadow(0 0 8px rgba(245, 166, 35, 0.6));
            -webkit-text-fill-color: initial;
        }
        .header-search-bar {
            position: relative;
            width: 100%;
            max-width: 520px;
        }
        .header-search-input {
            width: 100%;
            background: rgba(19, 29, 53, 0.75);
            border: 1px solid rgba(0, 210, 255, 0.25);
            border-radius: 50px;
            padding: 9px 52px 9px 20px;
            color: #fff;
            font-size: 0.92rem;
            outline: none;
            transition: var(--transition-smooth);
        }
        .header-search-input:focus {
            background: rgba(13, 23, 46, 0.95);
            border-color: var(--accent-gold);
            box-shadow: 0 0 18px rgba(245, 166, 35, 0.4);
        }
        .header-search-btn {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: none;
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #0b1120;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .header-search-btn:hover {
            box-shadow: 0 0 15px rgba(245, 166, 35, 0.7);
            transform: translateY(-50%) scale(1.05);
        }
        .nav-link-custom {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: 8px;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link-custom:hover, .nav-link-custom.active {
            color: #FFFFFF;
            background: rgba(0, 210, 255, 0.12);
            border: 1px solid rgba(0, 210, 255, 0.3);
        }

        /* Glass Cards & Badges */
        .glass-card {
            background: var(--card-glass);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-main);
            padding: 1.8rem;
            position: relative;
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-amber);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(245, 166, 35, 0.15);
        }
        .badge-pill-amber {
            background: rgba(245, 166, 35, 0.16);
            color: var(--accent-gold);
            border: 1px solid rgba(245, 166, 35, 0.4);
            border-radius: 50px;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .badge-pill-cyan {
            background: rgba(0, 210, 255, 0.15);
            color: var(--tech-cyan);
            border: 1px solid rgba(0, 210, 255, 0.35);
            border-radius: 50px;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* Glow Buttons */
        .btn-glow-amber {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #0b1120;
            font-weight: 700;
            border: none;
            border-radius: 10px;
            padding: 12px 28px;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.45);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-glow-amber:hover {
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(245, 166, 35, 0.65);
        }
        .btn-outline-cyan {
            background: rgba(0, 210, 255, 0.08);
            color: var(--tech-cyan);
            font-weight: 600;
            border: 1px solid var(--tech-cyan);
            border-radius: 10px;
            padding: 11px 26px;
            box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-cyan:hover {
            background: rgba(0, 210, 255, 0.2);
            color: #FFFFFF;
            border-color: #FFFFFF;
            box-shadow: 0 0 20px rgba(0, 210, 255, 0.4);
        }

        /* Section Layouts */
        .site-section {
            padding: 5rem 0;
            position: relative;
        }
        .section-header {
            margin-bottom: 2.8rem;
        }
        .section-title {
            font-size: 2.1rem;
            margin-bottom: 0.8rem;
            background: linear-gradient(135deg, #FFFFFF 30%, var(--tech-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 820px;
            line-height: 1.8;
        }

        /* 1. Dashboard Hero Stage */
        .hero-stage {
            padding: 4.5rem 0 3.5rem 0;
            position: relative;
            border-bottom: 1px solid rgba(0, 210, 255, 0.12);
        }
        .hero-h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            text-shadow: 0 0 30px rgba(0, 210, 255, 0.35);
        }
        .stat-metric-card {
            background: rgba(16, 26, 48, 0.85);
            border: 1px solid rgba(0, 210, 255, 0.2);
            border-radius: 12px;
            padding: 1.4rem 1.6rem;
            border-left: 4px solid var(--accent-gold);
            height: 100%;
        }
        .stat-number {
            font-size: 2.3rem;
            font-weight: 800;
            color: var(--accent-gold);
            font-family: monospace, sans-serif;
            text-shadow: 0 0 12px rgba(245, 166, 35, 0.4);
            line-height: 1.1;
        }

        /* 2. Service Matrix */
        .matrix-icon-box {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            background: rgba(0, 210, 255, 0.1);
            border: 1px solid rgba(0, 210, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--tech-cyan);
            margin-bottom: 1.2rem;
        }

        /* 3. Result Compare */
        .compare-box {
            background: rgba(14, 23, 44, 0.8);
            border-radius: var(--radius-main);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 2rem;
            height: 100%;
        }
        .compare-box.featured {
            border-color: var(--accent-gold);
            box-shadow: 0 0 25px rgba(245, 166, 35, 0.25);
            background: rgba(22, 35, 64, 0.9);
        }
        .metric-bar {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            overflow: hidden;
            margin-top: 6px;
        }
        .metric-progress-cyan {
            height: 100%;
            background: linear-gradient(90deg, var(--tech-blue), var(--tech-cyan));
            border-radius: 10px;
        }
        .metric-progress-amber {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-amber), var(--accent-gold));
            border-radius: 10px;
        }

        /* 4. Timeline Milestone */
        .timeline-step {
            position: relative;
            padding-left: 2rem;
            border-left: 2px solid rgba(0, 210, 255, 0.3);
            margin-bottom: 2rem;
        }
        .timeline-step::before {
            content: '';
            position: absolute;
            left: -7px;
            top: 0;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-gold);
            box-shadow: 0 0 10px var(--accent-gold);
        }

        /* 5. Article & Ranking List */
        .rank-num {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-gold);
            border: 1px solid var(--border-amber);
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .article-card-row {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.2rem 0;
        }
        .article-card-row:last-child {
            border-bottom: none;
        }

        /* Accordion Custom */
        .accordion-item {
            background: rgba(19, 29, 53, 0.7) !important;
            border: 1px solid rgba(0, 210, 255, 0.15) !important;
            border-radius: 10px !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent !important;
            color: #FFFFFF !important;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 1.2rem 1.4rem;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            border-left: 4px solid var(--accent-gold);
            background: rgba(0, 210, 255, 0.06) !important;
            color: var(--accent-gold) !important;
        }
        .accordion-button::after {
            filter: invert(1);
        }
        .accordion-body {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 1rem 1.4rem 1.5rem 1.4rem;
        }

        /* Footer */
        .site-footer {
            background: #060913;
            border-top: 1px solid rgba(0, 210, 255, 0.15);
            padding: 4rem 0 2rem 0;
            position: relative;
        }
        .pulse-dot {
            width: 8px;
            height: 8px;
            background-color: #10B981;
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 8px #10B981;
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.2); }
            100% { opacity: 1; transform: scale(1); }
        }

        /* Responsive Breakpoints */
        @media (max-width: 991px) {
            .hero-h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.8rem; }
            .header-search-bar { max-width: 100%; margin: 12px 0; }
        }
        @media (max-width: 576px) {
            .hero-h1 { font-size: 1.8rem; }
            .section-title { font-size: 1.5rem; }
            .stat-number { font-size: 1.8rem; }
            .glass-card { padding: 1.2rem; }
            .btn-glow-amber, .btn-outline-cyan { width: 100%; justify-content: center; }
        }

/* roulang page: category1 */
:root {
        --bg-deep: #0a0f1d;
        --bg-sub: #0d172e;
        --card-glass: rgba(19, 29, 53, 0.72);
        --accent-amber: #F5A623;
        --accent-gold: #FFC837;
        --tech-cyan: #00D2FF;
        --tech-blue: #3A7BD5;
        --text-main: #FFFFFF;
        --text-muted: #A0AEC0;
        --text-sub: #64748B;
        --border-glow: rgba(0, 210, 255, 0.2);
        --border-amber: rgba(245, 166, 35, 0.35);
        --radius-main: 14px;
        --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        background-color: var(--bg-deep);
        background-image: 
            radial-gradient(circle at 15% 20%, rgba(0, 210, 255, 0.08) 0%, transparent 40%),
            radial-gradient(circle at 85% 65%, rgba(245, 166, 35, 0.06) 0%, transparent 45%),
            radial-gradient(circle at 50% 90%, rgba(58, 123, 213, 0.1) 0%, transparent 50%);
        background-attachment: fixed;
        color: var(--text-main);
        line-height: 1.7;
        min-height: 100vh;
        overflow-x: hidden;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: var(--transition-smooth);
    }
    .text-cyan { color: var(--tech-cyan) !important; }
    .text-amber { color: var(--accent-gold) !important; }
    .text-muted-custom { color: var(--text-muted) !important; }
    .hover-white:hover { color: #FFFFFF !important; }

    /* Global Header & Search Navigation */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1050;
        background: rgba(10, 15, 29, 0.88);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(0, 210, 255, 0.18);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    }
    .brand-logo {
        font-size: 1.25rem;
        font-weight: 800;
        background: linear-gradient(135deg, #FFFFFF 0%, var(--accent-gold) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        display: flex;
        align-items: center;
        gap: 10px;
        white-space: nowrap;
    }
    .brand-logo i {
        color: var(--accent-amber);
        font-size: 1.35rem;
        filter: drop-shadow(0 0 8px rgba(245, 166, 35, 0.6));
        -webkit-text-fill-color: initial;
    }
    .header-search-bar {
        position: relative;
        width: 100%;
        max-width: 520px;
    }
    .header-search-input {
        width: 100%;
        background: rgba(19, 29, 53, 0.75);
        border: 1px solid rgba(0, 210, 255, 0.25);
        border-radius: 50px;
        padding: 9px 52px 9px 20px;
        color: #fff;
        font-size: 0.92rem;
        outline: none;
        transition: var(--transition-smooth);
    }
    .header-search-input:focus {
        background: rgba(13, 23, 46, 0.95);
        border-color: var(--accent-gold);
        box-shadow: 0 0 18px rgba(245, 166, 35, 0.4);
    }
    .header-search-btn {
        position: absolute;
        right: 4px;
        top: 50%;
        transform: translateY(-50%);
        width: 38px;
        height: 38px;
        border-radius: 50%;
        border: none;
        background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
        color: #0b1120;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: var(--transition-smooth);
    }
    .header-search-btn:hover {
        box-shadow: 0 0 15px rgba(245, 166, 35, 0.7);
        transform: translateY(-50%) scale(1.05);
    }
    .nav-link-custom {
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--text-muted);
        padding: 8px 16px;
        border-radius: 8px;
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .nav-link-custom:hover, .nav-link-custom.active {
        color: #FFFFFF;
        background: rgba(0, 210, 255, 0.12);
        border: 1px solid rgba(0, 210, 255, 0.3);
    }

    /* Glass Cards & Badges */
    .glass-card {
        background: var(--card-glass);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border: 1px solid var(--border-glow);
        border-radius: var(--radius-main);
        padding: 1.8rem;
        position: relative;
        overflow: hidden;
        transition: var(--transition-smooth);
    }
    .glass-card:hover {
        transform: translateY(-4px);
        border-color: var(--border-amber);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(245, 166, 35, 0.15);
    }
    .badge-pill-amber {
        background: rgba(245, 166, 35, 0.16);
        color: var(--accent-gold);
        border: 1px solid rgba(245, 166, 35, 0.4);
        border-radius: 50px;
        padding: 4px 12px;
        font-size: 0.8rem;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    .badge-pill-cyan {
        background: rgba(0, 210, 255, 0.15);
        color: var(--tech-cyan);
        border: 1px solid rgba(0, 210, 255, 0.35);
        border-radius: 50px;
        padding: 4px 12px;
        font-size: 0.8rem;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    .badge-tag-raw {
        background: rgba(10, 15, 29, 0.85);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(245, 166, 35, 0.4);
        color: var(--accent-gold);
        font-size: 0.72rem;
        font-weight: 700;
        padding: 3px 8px;
        border-radius: 4px;
    }

    /* Glow Buttons */
    .btn-glow-amber {
        background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
        color: #0b1120;
        font-weight: 700;
        border: none;
        border-radius: 10px;
        padding: 10px 22px;
        box-shadow: 0 4px 20px rgba(245, 166, 35, 0.45);
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }
    .btn-glow-amber:hover {
        color: #000;
        transform: translateY(-2px);
        box-shadow: 0 6px 25px rgba(245, 166, 35, 0.65);
    }
    .btn-glow-cyan {
        background: transparent;
        color: var(--tech-cyan);
        border: 1px solid var(--tech-cyan);
        border-radius: 10px;
        padding: 8px 18px;
        font-weight: 600;
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .btn-glow-cyan:hover {
        background: rgba(0, 210, 255, 0.15);
        box-shadow: 0 0 16px rgba(0, 210, 255, 0.4);
        color: #fff;
    }

    /* Breadcrumbs */
    .custom-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.88rem;
        color: var(--text-sub);
    }
    .custom-breadcrumb a:hover {
        color: var(--tech-cyan);
    }

    /* Section 1: Classification Header Metric Bar */
    .category-top-banner {
        padding: 2.5rem 0 1.5rem 0;
        border-bottom: 1px solid rgba(0, 210, 255, 0.12);
        background: linear-gradient(180deg, rgba(13, 23, 46, 0.7) 0%, rgba(10, 15, 29, 0) 100%);
    }
    .cat-main-title {
        font-size: 2.1rem;
        font-weight: 800;
        letter-spacing: -0.5px;
        line-height: 1.3;
        background: linear-gradient(135deg, #FFFFFF 20%, var(--accent-gold) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 0.6rem;
    }
    .metric-strip-box {
        background: rgba(19, 29, 53, 0.85);
        border: 1px solid var(--border-glow);
        border-radius: 12px;
        padding: 12px 20px;
        display: flex;
        align-items: center;
        justify-content: space-around;
        gap: 15px;
    }
    .metric-item {
        text-align: center;
    }
    .metric-item-num {
        font-size: 1.3rem;
        font-weight: 800;
        color: var(--accent-gold);
        font-family: monospace;
    }
    .metric-item-txt {
        font-size: 0.75rem;
        color: var(--text-sub);
    }

    /* Section 2: Shelf Filter Matrix */
    .filter-shelf-box {
        background: rgba(16, 26, 48, 0.85);
        border: 1px solid rgba(0, 210, 255, 0.18);
        border-radius: var(--radius-main);
        padding: 1.5rem;
    }
    .filter-row {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 0;
        border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
    }
    .filter-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .filter-label {
        font-size: 0.85rem;
        font-weight: 700;
        color: var(--text-muted);
        min-width: 90px;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .filter-pill {
        font-size: 0.82rem;
        color: var(--text-muted);
        padding: 4px 14px;
        border-radius: 50px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.1);
        cursor: pointer;
        transition: var(--transition-smooth);
    }
    .filter-pill:hover {
        background: rgba(0, 210, 255, 0.12);
        color: #fff;
        border-color: rgba(0, 210, 255, 0.3);
    }
    .filter-pill.active {
        background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
        color: #0b1120;
        font-weight: 700;
        border-color: transparent;
        box-shadow: 0 0 12px rgba(245, 166, 35, 0.4);
    }

    /* Section 3: Video Cards Grid */
    .video-shelf-card {
        background: var(--card-glass);
        border: 1px solid var(--border-glow);
        border-radius: 12px;
        overflow: hidden;
        transition: var(--transition-smooth);
        display: flex;
        flex-direction: column;
        height: 100%;
    }
    .video-shelf-card:hover {
        transform: translateY(-5px);
        border-color: var(--border-amber);
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.5), 0 0 20px rgba(245, 166, 35, 0.2);
    }
    .video-thumb-container {
        position: relative;
        width: 100%;
        padding-top: 56.25%; /* 16:9 Aspect Ratio */
        background: #0d1527;
        overflow: hidden;
    }
    .video-thumb-inner {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        background: linear-gradient(135deg, rgba(16, 26, 48, 0.9) 0%, rgba(10, 15, 29, 0.95) 100%);
    }
    .preview-canvas-pattern {
        position: absolute;
        inset: 0;
        opacity: 0.15;
        background-size: 20px 20px;
        background-image: linear-gradient(to right, rgba(0, 210, 255, 0.3) 1px, transparent 1px),
                          linear-gradient(to bottom, rgba(0, 210, 255, 0.3) 1px, transparent 1px);
    }
    .play-trigger-btn {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: rgba(245, 166, 35, 0.85);
        color: #0b1120;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.1rem;
        box-shadow: 0 0 20px rgba(245, 166, 35, 0.6);
        transition: var(--transition-smooth);
        z-index: 2;
    }
    .video-shelf-card:hover .play-trigger-btn {
        transform: scale(1.15);
        background: var(--accent-gold);
    }
    .video-time-tag {
        position: absolute;
        bottom: 8px;
        right: 8px;
        background: rgba(10, 15, 29, 0.85);
        font-size: 0.75rem;
        font-family: monospace;
        padding: 2px 6px;
        border-radius: 4px;
        border: 1px solid rgba(255, 255, 255, 0.1);
        z-index: 2;
    }
    .video-spec-tag {
        position: absolute;
        top: 8px;
        left: 8px;
        z-index: 2;
    }
    .video-card-body {
        padding: 1.2rem;
        display: flex;
        flex-direction: column;
        flex-grow: 1;
    }
    .video-card-title {
        font-size: 1.05rem;
        font-weight: 700;
        color: #fff;
        line-height: 1.4;
        margin-bottom: 0.5rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .video-card-desc {
        font-size: 0.85rem;
        color: var(--text-muted);
        line-height: 1.5;
        margin-bottom: 1rem;
        flex-grow: 1;
    }
    .video-card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 0.8rem;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        font-size: 0.8rem;
        color: var(--text-sub);
    }
    .stream-bar-holder {
        display: flex;
        align-items: flex-end;
        gap: 2px;
        height: 16px;
    }
    .stream-bar {
        width: 3px;
        background: var(--accent-amber);
        border-radius: 2px;
    }

    /* Custom Pagination */
    .custom-pagination {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        margin-top: 2rem;
    }
    .page-box {
        width: 40px;
        height: 40px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(19, 29, 53, 0.8);
        border: 1px solid rgba(0, 210, 255, 0.2);
        color: var(--text-muted);
        font-weight: 600;
        font-size: 0.9rem;
        transition: var(--transition-smooth);
    }
    .page-box:hover {
        border-color: var(--tech-cyan);
        color: #fff;
    }
    .page-box.active {
        background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
        border-color: transparent;
        color: #0b1120;
        box-shadow: 0 0 15px rgba(245, 166, 35, 0.4);
    }

    /* Section 4: Rankings & Editor's Picks */
    .rank-step-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .rank-step-item {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 10px 14px;
        background: rgba(16, 26, 48, 0.6);
        border: 1px solid rgba(0, 210, 255, 0.12);
        border-radius: 10px;
        transition: var(--transition-smooth);
    }
    .rank-step-item:hover {
        border-color: var(--accent-gold);
        background: rgba(19, 29, 53, 0.9);
        transform: translateX(4px);
    }
    .rank-num-box {
        width: 32px;
        height: 32px;
        border-radius: 6px;
        background: rgba(0, 210, 255, 0.1);
        color: var(--tech-cyan);
        font-weight: 800;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.95rem;
    }
    .rank-num-top {
        background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
        color: #0b1120;
        box-shadow: 0 0 10px rgba(245, 166, 35, 0.5);
    }

    /* Section 5: Technical Table */
    .tech-table-container {
        border-radius: var(--radius-main);
        overflow: hidden;
        border: 1px solid var(--border-glow);
    }
    .custom-tech-table {
        margin-bottom: 0;
        width: 100%;
        color: var(--text-main);
    }
    .custom-tech-table th {
        background: linear-gradient(90deg, rgba(24, 43, 82, 0.95) 0%, rgba(13, 23, 46, 0.95) 100%);
        color: var(--tech-cyan);
        font-weight: 700;
        padding: 16px 20px;
        border-bottom: 2px solid rgba(0, 210, 255, 0.25);
        font-size: 0.95rem;
    }
    .custom-tech-table td {
        padding: 14px 20px;
        background: rgba(16, 26, 48, 0.7);
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        font-size: 0.9rem;
        vertical-align: middle;
    }
    .custom-tech-table tr:nth-child(even) td {
        background: rgba(19, 31, 58, 0.75);
    }
    .custom-tech-table tr:hover td {
        background: rgba(26, 43, 80, 0.85);
    }

    /* Section 6: Hardware & Environment Guidance */
    .env-icon-circle {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: rgba(0, 210, 255, 0.1);
        border: 1px solid rgba(0, 210, 255, 0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--tech-cyan);
        margin-bottom: 1.2rem;
        box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
    }
    .env-step-card:hover .env-icon-circle {
        background: rgba(245, 166, 35, 0.15);
        border-color: var(--accent-gold);
        color: var(--accent-gold);
        box-shadow: 0 0 20px rgba(245, 166, 35, 0.35);
    }

    /* Section 7: FAQ Cards */
    .flat-faq-card {
        background: rgba(16, 26, 48, 0.75);
        border: 1px solid rgba(0, 210, 255, 0.16);
        border-left: 4px solid var(--tech-cyan);
        border-radius: 10px;
        padding: 1.5rem;
        height: 100%;
        transition: var(--transition-smooth);
    }
    .flat-faq-card:hover {
        border-left-color: var(--accent-gold);
        border-color: var(--border-amber);
        transform: translateY(-3px);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
    .flat-faq-card h4 {
        font-size: 1.05rem;
        font-weight: 700;
        color: #FFFFFF;
        margin-bottom: 0.8rem;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    /* Site Footer */
    .site-footer {
        background: rgba(8, 12, 23, 0.95);
        border-top: 1px solid rgba(0, 210, 255, 0.15);
        padding: 3.5rem 0 1.5rem 0;
        margin-top: 4rem;
        font-size: 0.9rem;
    }
    .pulse-dot {
        width: 8px;
        height: 8px;
        background: #10B981;
        border-radius: 50%;
        display: inline-block;
        box-shadow: 0 0 8px #10B981;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 1.5rem;
        margin-top: 2rem;
        text-align: center;
        color: var(--text-sub);
        font-size: 0.82rem;
    }

    @media (max-width: 991px) {
        .cat-main-title { font-size: 1.8rem; }
        .metric-strip-box { margin-top: 1.2rem; }
    }
    @media (max-width: 767px) {
        .cat-main-title { font-size: 1.5rem; }
        .filter-row { gap: 6px; }
        .filter-label { width: 100%; margin-bottom: 4px; }
        .filter-shelf-box { padding: 1rem; }
        .metric-strip-box { flex-wrap: wrap; gap: 10px; }
        .metric-item { width: 45%; }
        .custom-tech-table th, .custom-tech-table td { padding: 10px 12px; font-size: 0.8rem; }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}