/* roulang page: index */
:root {
            --brand-neon: #00F2FE;
            --brand-electric: #4FACFE;
            --brand-dark-nav: #0A0E17;
            --brand-dark-card: #111827;
            --brand-bg-cold: #F4F7FA;
            --brand-white: #FFFFFF;
            --brand-border: #E2E8F0;
            --brand-text-primary: #1E293B;
            --brand-text-secondary: #475569;
            --brand-text-muted: #94A3B8;
            --brand-success: #10B981;
            --brand-warning: #F59E0B;
            --brand-danger: #EF4444;
            --brand-radius-card: 10px;
            --brand-radius-btn: 6px;
            --brand-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
            --brand-shadow-hover: 0 10px 24px rgba(15, 23, 42, 0.12);
        }

        /* 基础与重置 */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            line-height: 1.8;
            color: var(--brand-text-secondary);
            background-color: var(--brand-bg-cold);
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--brand-text-primary);
            letter-spacing: -0.01em;
            font-weight: 600;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.25s ease;
        }

        /* 导航栏：暗色霓虹风格 */
        .site-navbar {
            background-color: var(--brand-dark-nav);
            border-bottom: 1px solid rgba(0, 242, 254, 0.2);
            padding: 0.85rem 0;
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .site-logo i {
            color: var(--brand-neon);
            text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
        }

        .site-nav .nav-link {
            color: #CBD5E1;
            font-weight: 500;
            padding: 0.6rem 1.1rem;
            position: relative;
            transition: color 0.25s ease;
        }

        .site-nav .nav-link:hover,
        .site-nav .nav-link.active {
            color: var(--brand-neon);
        }

        .site-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1.1rem;
            right: 1.1rem;
            height: 2px;
            background: transparent;
            transition: all 0.25s ease;
        }

        .site-nav .nav-link:hover::after,
        .site-nav .nav-link.active::after {
            background: var(--brand-neon);
            box-shadow: 0 0 10px var(--brand-neon);
        }

        .nav-btn-status {
            background: rgba(0, 242, 254, 0.08);
            border: 1px solid var(--brand-neon);
            color: var(--brand-neon);
            padding: 0.45rem 1rem;
            font-size: 0.875rem;
            border-radius: var(--brand-radius-btn);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
        }

        .status-dot-pulse {
            width: 8px;
            height: 8px;
            background-color: var(--brand-success);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--brand-success);
            animation: pulse-green 1.8s infinite;
        }

        @keyframes pulse-green {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.25); opacity: 1; }
            100% { transform: scale(0.95); opacity: 0.8; }
        }

        /* 统一分段与背景交替 */
        .section-padding {
            padding: 4.5rem 0;
            position: relative;
            border-bottom: 1px solid var(--brand-border);
        }

        .section-alt {
            background-color: var(--brand-white);
        }

        .section-header {
            margin-bottom: 2.75rem;
        }

        .section-header h2 {
            font-size: 1.85rem;
            margin-bottom: 0.75rem;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--brand-text-muted);
            max-width: 760px;
            margin: 0 auto;
            line-height: 1.75;
        }

        /* Hero 工具首屏 */
        .hero-section {
            background: linear-gradient(180deg, #0A0E17 0%, #151D2C 100%);
            color: #FFFFFF;
            padding: 5rem 0 4.5rem;
            position: relative;
        }

        .hero-badge-tag {
            background: rgba(0, 242, 254, 0.15);
            color: var(--brand-neon);
            border: 1px solid rgba(0, 242, 254, 0.35);
            padding: 0.3rem 0.85rem;
            border-radius: 20px;
            font-size: 0.825rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 1.25rem;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.35;
            margin-bottom: 1.25rem;
        }

        .hero-desc {
            font-size: 1.05rem;
            color: #94A3B8;
            max-width: 820px;
            margin: 0 auto 2.5rem;
            line-height: 1.8;
        }

        .hero-control-panel {
            background: #FFFFFF;
            border-radius: var(--brand-radius-card);
            padding: 1.75rem;
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
            max-width: 980px;
            margin: 0 auto;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .filter-select {
            background-color: #F8FAFC;
            border: 1px solid var(--brand-border);
            color: var(--brand-text-primary);
            border-radius: var(--brand-radius-btn);
            padding: 0.65rem 0.85rem;
            font-size: 0.925rem;
            font-weight: 500;
        }

        .filter-select:focus {
            outline: none;
            border-color: var(--brand-electric);
            box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.2);
        }

        .btn-neon-action {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            border: none;
            color: #0A0E17;
            font-weight: 700;
            padding: 0.68rem 1.6rem;
            border-radius: var(--brand-radius-btn);
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
        }

        .btn-neon-action:hover {
            box-shadow: 0 0 16px rgba(0, 242, 254, 0.6);
            color: #000000;
            transform: translateY(-2px);
        }

        .hero-meta-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-top: 2rem;
        }

        .hero-meta-pill {
            font-size: 0.85rem;
            color: #CBD5E1;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta-pill i {
            color: var(--brand-neon);
        }

        /* 标准卡片样式 */
        .service-card {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            padding: 1.85rem 1.5rem;
            box-shadow: var(--brand-shadow);
            transition: all 0.25s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--brand-shadow-hover);
            transform: translateY(-4px);
            border-color: #CBD5E1;
        }

        .service-icon-box {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: #EFF6FF;
            color: var(--brand-electric);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 1.25rem;
        }

        .service-card h3 {
            font-size: 1.2rem;
            margin-bottom: 0.65rem;
        }

        .service-card p {
            font-size: 0.925rem;
            color: var(--brand-text-secondary);
            margin-bottom: 1.25rem;
            flex-grow: 1;
        }

        .service-tag-status {
            font-size: 0.775rem;
            padding: 0.25rem 0.65rem;
            border-radius: 4px;
            background: #F1F5F9;
            color: #64748B;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 仪器化数据看板 */
        .dash-board-wrap {
            background: #0F172A;
            border-radius: var(--brand-radius-card);
            padding: 2.25rem 1.75rem;
            border: 1px solid #1E293B;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .dash-metric-item {
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
            padding: 0 1rem;
        }

        .dash-metric-item:last-child {
            border-right: none;
        }

        .dash-number {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--brand-neon);
            font-family: "Courier New", Courier, monospace, sans-serif;
            margin-bottom: 0.25rem;
        }

        .dash-title {
            color: #94A3B8;
            font-size: 0.875rem;
            font-weight: 500;
        }

        .dash-tag-param {
            display: inline-block;
            margin-top: 0.4rem;
            font-size: 0.75rem;
            color: var(--brand-success);
            background: rgba(16, 185, 129, 0.1);
            padding: 0.15rem 0.5rem;
            border-radius: 3px;
        }

        /* 时序时钟流程步骤 */
        .step-timeline-card {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            padding: 1.75rem;
            position: relative;
            box-shadow: var(--brand-shadow);
            height: 100%;
        }

        .step-badge {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--brand-electric);
            color: #FFFFFF;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            font-size: 0.95rem;
        }

        .step-timeline-card h4 {
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
        }

        .step-timeline-card p {
            font-size: 0.9rem;
            color: var(--brand-text-secondary);
            margin-bottom: 0;
        }

        /* 案例精选卡片 */
        .media-case-card {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            overflow: hidden;
            box-shadow: var(--brand-shadow);
            transition: all 0.25s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .media-case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--brand-shadow-hover);
        }

        .media-thumb-box {
            position: relative;
            background: #1E293B;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .media-thumb-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
            transition: transform 0.35s ease;
        }

        .media-case-card:hover .media-thumb-box img {
            transform: scale(1.05);
        }

        .badge-sub-source {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(10, 14, 23, 0.85);
            color: var(--brand-neon);
            font-size: 0.75rem;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            backdrop-filter: blur(4px);
            font-weight: 600;
        }

        .badge-resolution {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background: rgba(0, 0, 0, 0.75);
            color: #FFFFFF;
            font-size: 0.75rem;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }

        .media-case-body {
            padding: 1.25rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .media-case-body h4 {
            font-size: 1.05rem;
            margin-bottom: 0.5rem;
            line-height: 1.45;
        }

        .media-case-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--brand-text-muted);
            margin-top: auto;
            padding-top: 0.75rem;
            border-top: 1px dashed var(--brand-border);
        }

        /* 终端生态卡片 */
        .device-spec-box {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            padding: 1.5rem;
            box-shadow: var(--brand-shadow);
        }

        .device-row-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 0.95rem 0;
            border-bottom: 1px solid #F1F5F9;
        }

        .device-row-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .device-icon-badge {
            width: 40px;
            height: 40px;
            border-radius: 6px;
            background: #F8FAFC;
            color: #334155;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
        }

        /* 资讯更新切片排版 */
        .news-slice-item {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            padding: 1.25rem 1.5rem;
            margin-bottom: 0.9rem;
            box-shadow: var(--brand-shadow);
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .news-slice-item:hover {
            border-color: #CBD5E1;
            box-shadow: var(--brand-shadow-hover);
        }

        .news-meta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .news-ver-badge {
            background: #EFF6FF;
            color: #2563EB;
            font-size: 0.785rem;
            padding: 0.2rem 0.55rem;
            border-radius: 4px;
            font-weight: 600;
        }

        .news-date {
            font-size: 0.85rem;
            color: var(--brand-text-muted);
        }

        .news-title {
            font-size: 0.975rem;
            font-weight: 600;
            color: var(--brand-text-primary);
            margin: 0;
        }

        /* 专线机房调度卡片 */
        .server-load-card {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card);
            padding: 1.5rem;
            box-shadow: var(--brand-shadow);
            height: 100%;
        }

        .server-header-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }

        .server-status-pill {
            font-size: 0.75rem;
            padding: 0.18rem 0.55rem;
            border-radius: 20px;
            font-weight: 600;
        }

        .status-optimal {
            background: #ECFDF5;
            color: var(--brand-success);
        }

        .status-busy {
            background: #FFFBEB;
            color: var(--brand-warning);
        }

        .load-bar-track {
            height: 6px;
            background: #E2E8F0;
            border-radius: 3px;
            overflow: hidden;
            margin: 0.75rem 0;
        }

        .load-bar-fill {
            height: 100%;
            background: var(--brand-electric);
            border-radius: 3px;
        }

        /* 合作伙伴灰度墙 */
        .partner-logo-item {
            background: var(--brand-white);
            border: 1px solid var(--brand-border);
            border-radius: 6px;
            padding: 1.25rem 1rem;
            text-align: center;
            color: #64748B;
            font-size: 0.95rem;
            font-weight: 600;
            transition: all 0.25s ease;
        }

        .partner-logo-item:hover {
            color: var(--brand-electric);
            border-color: #CBD5E1;
        }

        /* FAQ 手风琴重构 */
        .accordion-item {
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-card) !important;
            margin-bottom: 0.85rem;
            overflow: hidden;
            background: var(--brand-white);
        }

        .accordion-button {
            background-color: var(--brand-white);
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--brand-text-primary);
            padding: 1.15rem 1.35rem;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            color: #2563EB;
            background-color: #F8FAFC;
        }

        .accordion-body {
            font-size: 0.925rem;
            line-height: 1.8;
            color: var(--brand-text-secondary);
            padding: 1.25rem 1.35rem;
        }

        /* 安全承诺条 */
        .trust-guarantee-bar {
            background: #0A0E17;
            color: #FFFFFF;
            padding: 2.25rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .trust-item-flex {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .trust-item-flex i {
            color: var(--brand-neon);
            font-size: 1.75rem;
        }

        .trust-item-text h5 {
            color: #FFFFFF;
            font-size: 0.95rem;
            margin-bottom: 0.15rem;
        }

        .trust-item-text p {
            color: #94A3B8;
            font-size: 0.8rem;
            margin-bottom: 0;
        }

        /* 收口召唤区 CTA */
        .bottom-cta-banner {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            border-radius: var(--brand-radius-card);
            padding: 3.5rem 2.5rem;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.12);
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.2);
        }

        .bottom-cta-banner h2 {
            color: #FFFFFF;
            font-size: 2.15rem;
            margin-bottom: 1rem;
        }

        /* 统一页脚 */
        .site-footer {
            background-color: #0A0E17;
            color: #94A3B8;
            padding: 4rem 0 2rem;
            border-top: 1px solid #1E293B;
            font-size: 0.9rem;
        }

        .footer-brand-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 0.85rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand-title i {
            color: var(--brand-neon);
        }

        .footer-links-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links-list li {
            margin-bottom: 0.65rem;
        }

        .footer-links-list a {
            color: #94A3B8;
        }

        .footer-links-list a:hover {
            color: var(--brand-neon);
        }

        .footer-bottom-bar {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #1E293B;
            font-size: 0.825rem;
            color: #64748B;
        }

        /* 响应式调整 */
        @media (max-width: 991.98px) {
            .dash-metric-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                padding: 1rem 0;
            }
            .dash-metric-item:last-child {
                border-bottom: none;
            }
            .hero-title {
                font-size: 2.1rem;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: 3.25rem 0;
            }
            .hero-title {
                font-size: 1.75rem;
            }
            .bottom-cta-banner {
                padding: 2.25rem 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
      --brand-neon: #00F2FE;
      --brand-electric: #4FACFE;
      --brand-dark-nav: #0A0E17;
      --brand-dark-card: #111827;
      --brand-bg-cold: #F4F7FA;
      --brand-white: #FFFFFF;
      --brand-border: #E2E8F0;
      --brand-text-primary: #1E293B;
      --brand-text-secondary: #475569;
      --brand-text-muted: #94A3B8;
      --brand-success: #10B981;
      --brand-warning: #F59E0B;
      --brand-danger: #EF4444;
      --brand-radius-card: 10px;
      --brand-radius-btn: 6px;
      --brand-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
      --brand-shadow-hover: 0 10px 24px rgba(15, 23, 42, 0.12);
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.8;
      color: var(--brand-text-secondary);
      background-color: var(--brand-bg-cold);
      overflow-x: hidden;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 导航栏 */
    .site-navbar {
      background-color: var(--brand-dark-nav);
      border-bottom: 1px solid rgba(0, 242, 254, 0.2);
      padding: 0.85rem 0;
      position: sticky;
      top: 0;
      z-index: 1050;
    }
    .site-logo {
      font-size: 1.35rem;
      font-weight: 700;
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .site-logo i {
      color: var(--brand-neon);
      text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
    }
    .site-nav .nav-link {
      color: #CBD5E1;
      font-weight: 500;
      padding: 0.6rem 1.1rem;
      position: relative;
      transition: color 0.25s ease;
    }
    .site-nav .nav-link:hover,
    .site-nav .nav-link.active {
      color: var(--brand-neon);
    }
    .site-nav .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 1.1rem;
      right: 1.1rem;
      height: 2px;
      background: transparent;
      transition: all 0.25s ease;
    }
    .site-nav .nav-link:hover::after,
    .site-nav .nav-link.active::after {
      background: var(--brand-neon);
      box-shadow: 0 0 10px var(--brand-neon);
    }
    .nav-btn-status {
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid var(--brand-neon);
      color: var(--brand-neon);
      padding: 0.45rem 1rem;
      font-size: 0.875rem;
      border-radius: var(--brand-radius-btn);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
    }
    .status-dot-pulse {
      width: 8px;
      height: 8px;
      background-color: var(--brand-neon);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--brand-neon);
      animation: pulseGlow 1.8s infinite;
    }
    @keyframes pulseGlow {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* 板块通用间隙与标题 */
    .section-padding {
      padding: 3.5rem 0;
      border-bottom: 1px solid var(--brand-border);
    }
    .section-alt {
      background-color: var(--brand-white);
    }
    .section-header {
      margin-bottom: 2rem;
    }
    .section-header h2 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--brand-text-primary);
      letter-spacing: -0.01em;
      margin-bottom: 0.5rem;
    }
    .section-subtitle {
      font-size: 0.95rem;
      color: var(--brand-text-muted);
      line-height: 1.7;
    }

    /* 板块1：分类头 */
    .category-header-bar {
      background: #0D131F;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 2.25rem 0;
      color: #FFFFFF;
    }
    .breadcrumb-nav {
      font-size: 0.875rem;
      margin-bottom: 0.75rem;
    }
    .breadcrumb-nav a {
      color: var(--brand-text-muted);
    }
    .breadcrumb-nav a:hover {
      color: var(--brand-neon);
    }
    .breadcrumb-nav .separator {
      margin: 0 8px;
      color: rgba(255, 255, 255, 0.3);
    }
    .breadcrumb-nav .current-node {
      color: #CBD5E1;
      font-weight: 500;
    }
    .category-title-wrap h1 {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 0.25rem;
      letter-spacing: -0.01em;
      color: #FFFFFF;
    }
    .category-meta-badge {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 0.6rem 1.25rem;
      border-radius: 8px;
      font-size: 0.875rem;
    }
    .category-meta-badge .stat-num {
      color: var(--brand-neon);
      font-weight: 700;
    }

    /* 板块2：多维属性交叉筛选舱 */
    .filter-dock-panel {
      background: var(--brand-white);
      border: 1px solid var(--brand-border);
      border-radius: var(--brand-radius-card);
      padding: 1.75rem 2rem;
      box-shadow: var(--brand-shadow);
      margin-top: -1.5rem;
      position: relative;
      z-index: 10;
    }
    .filter-dock-row {
      display: flex;
      align-items: flex-start;
      padding: 0.75rem 0;
      border-bottom: 1px dashed #EDF2F7;
    }
    .filter-dock-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-dock-label {
      width: 100px;
      flex-shrink: 0;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--brand-text-primary);
      padding-top: 0.35rem;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .filter-capsules {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      flex-grow: 1;
    }
    .filter-capsule-item {
      font-size: 0.825rem;
      padding: 0.35rem 0.95rem;
      border-radius: 20px;
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
      color: var(--brand-text-secondary);
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-capsule-item:hover {
      border-color: var(--brand-electric);
      color: var(--brand-electric);
      background: #F0F7FF;
    }
    .filter-capsule-item.active {
      background: var(--brand-dark-nav);
      color: var(--brand-neon);
      border-color: var(--brand-neon);
      box-shadow: 0 2px 8px rgba(0, 242, 254, 0.25);
    }
    .filter-reset-action {
      margin-left: auto;
      font-size: 0.825rem;
      color: var(--brand-text-muted);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .filter-reset-action:hover {
      color: var(--brand-danger);
    }

    /* 板块3：卡片网格 */
    .stream-card {
      background: var(--brand-white);
      border: 1px solid var(--brand-border);
      border-radius: var(--brand-radius-card);
      overflow: hidden;
      box-shadow: var(--brand-shadow);
      transition: all 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .stream-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--brand-shadow-hover);
      border-color: #CBD5E1;
    }
    .card-thumb-holder {
      position: relative;
      width: 100%;
      padding-top: 56.25%; /* 16:9 */
      background: #1E293B;
      overflow: hidden;
    }
    .card-thumb-bg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      background: radial-gradient(circle at center, #1E293B 0%, #0F172A 100%);
      color: rgba(255, 255, 255, 0.15);
      font-size: 2.8rem;
    }
    .card-res-badge {
      position: absolute;
      top: 10px;
      right: 10px;
      background: rgba(10, 14, 23, 0.85);
      color: var(--brand-neon);
      border: 1px solid rgba(0, 242, 254, 0.4);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.2rem 0.55rem;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }
    .card-sub-tag {
      position: absolute;
      bottom: 10px;
      left: 10px;
      background: rgba(16, 185, 129, 0.9);
      color: #FFFFFF;
      font-size: 0.725rem;
      font-weight: 600;
      padding: 0.18rem 0.5rem;
      border-radius: 4px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .card-duration {
      position: absolute;
      bottom: 10px;
      right: 10px;
      background: rgba(0, 0, 0, 0.65);
      color: #E2E8F0;
      font-size: 0.725rem;
      padding: 0.15rem 0.45rem;
      border-radius: 4px;
    }
    .card-body-content {
      padding: 1.25rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .card-title-text {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--brand-text-primary);
      margin-bottom: 0.65rem;
      line-height: 1.5;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .card-tech-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--brand-text-muted);
      margin-bottom: 0.85rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid #F1F5F9;
    }
    .stability-indicator {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.775rem;
      color: var(--brand-text-secondary);
    }
    .stability-bar-bg {
      width: 50px;
      height: 4px;
      background: #E2E8F0;
      border-radius: 2px;
      overflow: hidden;
      display: inline-block;
    }
    .stability-bar-fill {
      height: 100%;
      background: var(--brand-success);
      width: 98%;
    }
    .card-action-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: auto;
      padding-top: 0.5rem;
    }
    .card-play-btn {
      background: #F1F5F9;
      color: var(--brand-text-primary);
      font-size: 0.825rem;
      font-weight: 600;
      padding: 0.4rem 0.9rem;
      border-radius: var(--brand-radius-btn);
      border: 1px solid #CBD5E1;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .card-play-btn:hover {
      background: var(--brand-dark-nav);
      color: var(--brand-neon);
      border-color: var(--brand-neon);
    }
    .pagination-custom {
      display: flex;
      justify-content: center;
      gap: 6px;
      margin-top: 2.5rem;
    }
    .pagination-custom .page-link {
      color: var(--brand-text-secondary);
      background: var(--brand-white);
      border: 1px solid var(--brand-border);
      padding: 0.5rem 0.95rem;
      font-weight: 600;
      border-radius: var(--brand-radius-btn);
    }
    .pagination-custom .page-link.active {
      background: var(--brand-dark-nav);
      color: var(--brand-neon);
      border-color: var(--brand-neon);
    }

    /* 板块4：子专题快速入口 */
    .subtopic-card {
      background: var(--brand-white);
      border: 1px solid var(--brand-border);
      border-radius: var(--brand-radius-card);
      padding: 1.5rem;
      transition: all 0.25s ease;
      display: block;
      height: 100%;
    }
    .subtopic-card:hover {
      border-color: var(--brand-electric);
      transform: translateY(-3px);
      box-shadow: var(--brand-shadow);
    }
    .subtopic-icon {
      width: 46px;
      height: 46px;
      border-radius: 8px;
      background: rgba(79, 172, 254, 0.1);
      color: var(--brand-electric);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 1rem;
    }
    .subtopic-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--brand-text-primary);
      margin-bottom: 0.5rem;
    }
    .subtopic-desc {
      font-size: 0.85rem;
      color: var(--brand-text-muted);
      line-height: 1.6;
      margin-bottom: 0.75rem;
    }
    .subtopic-count {
      font-size: 0.785rem;
      color: var(--brand-electric);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块5：观影技术参数与指南 */
    .spec-guide-card {
      background: var(--brand-white);
      border: 1px solid var(--brand-border);
      border-radius: var(--brand-radius-card);
      padding: 2rem;
      box-shadow: var(--brand-shadow);
      height: 100%;
    }
    .spec-guide-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 1.25rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid var(--brand-border);
    }
    .spec-guide-icon {
      font-size: 1.6rem;
      color: var(--brand-electric);
    }
    .spec-guide-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--brand-text-primary);
      margin: 0;
    }
    .spec-list-item {
      display: flex;
      margin-bottom: 1rem;
      gap: 12px;
    }
    .spec-list-item i {
      color: var(--brand-success);
      margin-top: 5px;
      font-size: 0.9rem;
    }
    .spec-item-content h4 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--brand-text-primary);
      margin-bottom: 0.25rem;
    }
    .spec-item-content p {
      font-size: 0.85rem;
      color: var(--brand-text-secondary);
      margin: 0;
      line-height: 1.65;
    }

    /* 板块6：FAQ */
    .accordion-custom .accordion-item {
      border: 1px solid var(--brand-border);
      background-color: var(--brand-white);
      border-radius: var(--brand-radius-card) !important;
      margin-bottom: 1rem;
      overflow: hidden;
      box-shadow: var(--brand-shadow);
    }
    .accordion-custom .accordion-button {
      font-size: 1rem;
      font-weight: 600;
      color: var(--brand-text-primary);
      background-color: var(--brand-white);
      padding: 1.15rem 1.4rem;
      box-shadow: none;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--brand-electric);
      background-color: #F8FAFC;
    }
    .accordion-custom .accordion-body {
      padding: 1.25rem 1.4rem;
      font-size: 0.925rem;
      color: var(--brand-text-secondary);
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
    }

    /* 板块7：轻量收尾唤起条 */
    .category-subscribe-bar {
      background: linear-gradient(135deg, #0A0E17 0%, #151D2C 100%);
      border: 1px solid rgba(0, 242, 254, 0.25);
      border-radius: var(--brand-radius-card);
      padding: 2.25rem 2.5rem;
      color: #FFFFFF;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }
    .subscribe-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 0.35rem;
    }
    .subscribe-desc {
      font-size: 0.875rem;
      color: var(--brand-text-muted);
      margin: 0;
    }
    .subscribe-form-box {
      display: flex;
      gap: 10px;
    }
    .subscribe-input {
      background: #FFFFFF;
      border: 1px solid var(--brand-border);
      border-radius: var(--brand-radius-btn);
      padding: 0.65rem 1rem;
      font-size: 0.9rem;
      color: var(--brand-text-primary);
      flex-grow: 1;
    }
    .subscribe-input:focus {
      outline: none;
      border-color: var(--brand-neon);
      box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.25);
    }
    .btn-neon-sub {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      color: #0A0E17;
      font-weight: 700;
      border: none;
      border-radius: var(--brand-radius-btn);
      padding: 0.65rem 1.4rem;
      font-size: 0.9rem;
      white-space: nowrap;
      transition: all 0.25s ease;
    }
    .btn-neon-sub:hover {
      box-shadow: 0 0 14px rgba(0, 242, 254, 0.6);
      transform: translateY(-2px);
      color: #000000;
    }

    /* 页脚样式 */
    .footer-custom {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 4rem 0 2rem;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand {
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      display: flex;
      align-items: center;
    }
    .footer-desc {
      line-height: 1.75;
      font-size: 0.85rem;
      color: #94A3B8;
    }
    .footer-title {
      font-size: 1rem;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94A3B8;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: var(--brand-neon);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 1.5rem;
      margin-top: 2.5rem;
      font-size: 0.825rem;
      color: #64748B;
    }

    @media (max-width: 991.98px) {
      .filter-dock-label {
        width: 100%;
        margin-bottom: 6px;
      }
      .filter-dock-row {
        flex-direction: column;
      }
      .subscribe-form-box {
        margin-top: 1.25rem;
      }
    }

/* roulang page: category2 */
:root {
        --brand-neon: #00F2FE;
        --brand-electric: #4FACFE;
        --brand-dark-nav: #0A0E17;
        --brand-dark-card: #111827;
        --brand-bg-cold: #F4F7FA;
        --brand-white: #FFFFFF;
        --brand-border: #E2E8F0;
        --brand-text-primary: #1E293B;
        --brand-text-secondary: #475569;
        --brand-text-muted: #94A3B8;
        --brand-success: #10B981;
        --brand-warning: #F59E0B;
        --brand-danger: #EF4444;
        --brand-radius-card: 10px;
        --brand-radius-btn: 6px;
        --brand-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
        --brand-shadow-hover: 0 10px 24px rgba(15, 23, 42, 0.12);
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
        line-height: 1.8;
        color: var(--brand-text-secondary);
        background-color: var(--brand-bg-cold);
        overflow-x: hidden;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: all 0.25s ease;
    }
    /* 导航栏 */
    .site-navbar {
        background-color: var(--brand-dark-nav);
        border-bottom: 1px solid rgba(0, 242, 254, 0.2);
        padding: 0.85rem 0;
        position: sticky;
        top: 0;
        z-index: 1050;
    }
    .site-logo {
        font-size: 1.35rem;
        font-weight: 700;
        color: #FFFFFF;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .site-logo i {
        color: var(--brand-neon);
        text-shadow: 0 0 10px rgba(0, 242, 254, 0.6);
    }
    .site-nav .nav-link {
        color: #CBD5E1;
        font-weight: 500;
        padding: 0.6rem 1.1rem;
        position: relative;
        transition: color 0.25s ease;
    }
    .site-nav .nav-link:hover,
    .site-nav .nav-link.active {
        color: var(--brand-neon);
    }
    .site-nav .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 1.1rem;
        right: 1.1rem;
        height: 2px;
        background: transparent;
        transition: all 0.25s ease;
    }
    .site-nav .nav-link:hover::after,
    .site-nav .nav-link.active::after {
        background: var(--brand-neon);
        box-shadow: 0 0 10px var(--brand-neon);
    }
    .nav-btn-status {
        background: rgba(0, 242, 254, 0.08);
        border: 1px solid var(--brand-neon);
        color: var(--brand-neon);
        padding: 0.45rem 1rem;
        font-size: 0.875rem;
        border-radius: var(--brand-radius-btn);
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-weight: 600;
    }
    .status-dot-pulse {
        width: 8px;
        height: 8px;
        background-color: var(--brand-neon);
        border-radius: 50%;
        display: inline-block;
        box-shadow: 0 0 8px var(--brand-neon);
        animation: pulse-glow 2s infinite ease-in-out;
    }
    @keyframes pulse-glow {
        0%, 100% { transform: scale(1); opacity: 1; }
        50% { transform: scale(1.3); opacity: 0.5; }
    }
    /* 页面分区通用 */
    .section-padding {
        padding: 4.25rem 0;
        position: relative;
        border-bottom: 1px solid var(--brand-border);
    }
    .section-alt {
        background-color: var(--brand-white);
    }
    .section-header {
        margin-bottom: 2.5rem;
    }
    .section-header h2 {
        font-size: 1.85rem;
        font-weight: 700;
        color: var(--brand-text-primary);
        margin-bottom: 0.75rem;
        letter-spacing: -0.01em;
    }
    .section-subtitle {
        font-size: 1rem;
        color: var(--brand-text-muted);
        max-width: 780px;
        margin: 0 auto;
        line-height: 1.75;
    }
    /* 1. 分类头与面包屑 */
    .category-topbar {
        background: #FFFFFF;
        border-bottom: 1px solid var(--brand-border);
        padding: 2.25rem 0;
    }
    .breadcrumb-custom {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.875rem;
        color: var(--brand-text-muted);
        margin-bottom: 0.6rem;
    }
    .breadcrumb-custom a:hover {
        color: var(--brand-electric);
    }
    .breadcrumb-custom .separator {
        color: #CBD5E1;
    }
    .category-topbar h1 {
        font-size: 2.1rem;
        font-weight: 700;
        color: var(--brand-text-primary);
        margin-bottom: 0.5rem;
    }
    .category-topbar-p {
        color: var(--brand-text-secondary);
        font-size: 0.95rem;
        margin-bottom: 0;
    }
    .topbar-meta-badge {
        background: #F1F5F9;
        border: 1px solid var(--brand-border);
        padding: 0.6rem 1.1rem;
        border-radius: var(--brand-radius-card);
        font-size: 0.85rem;
        color: var(--brand-text-secondary);
        display: inline-flex;
        align-items: center;
        gap: 12px;
    }
    .topbar-meta-badge strong {
        color: var(--brand-text-primary);
    }
    /* 2. 多维属性筛选舱 */
    .filter-cockpit {
        background: #FFFFFF;
        border: 1px solid var(--brand-border);
        border-radius: var(--brand-radius-card);
        padding: 1.5rem 1.75rem;
        box-shadow: var(--brand-shadow);
        margin-top: 2rem;
        margin-bottom: 2.5rem;
    }
    .filter-row {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        padding: 0.65rem 0;
        border-bottom: 1px dashed #EDF2F7;
    }
    .filter-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .filter-label {
        width: 110px;
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--brand-text-primary);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .filter-options {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        flex: 1;
    }
    .filter-pill {
        display: inline-block;
        font-size: 0.825rem;
        padding: 0.28rem 0.85rem;
        border-radius: 20px;
        color: var(--brand-text-secondary);
        background: #F8FAFC;
        border: 1px solid transparent;
        cursor: pointer;
        transition: all 0.2s ease;
    }
    .filter-pill:hover {
        background: #EDF2F7;
        color: var(--brand-text-primary);
    }
    .filter-pill.active {
        background: rgba(79, 172, 254, 0.12);
        color: #0284C7;
        border-color: rgba(79, 172, 254, 0.4);
        font-weight: 600;
    }
    .filter-reset-btn {
        font-size: 0.8rem;
        color: var(--brand-text-muted);
        border: none;
        background: none;
        padding: 0 0.5rem;
        cursor: pointer;
    }
    .filter-reset-btn:hover {
        color: var(--brand-danger);
    }
    /* 3. 卡片网格 */
    .stream-card {
        background: #FFFFFF;
        border: 1px solid var(--brand-border);
        border-radius: var(--brand-radius-card);
        overflow: hidden;
        box-shadow: var(--brand-shadow);
        transition: all 0.25s ease;
        display: flex;
        flex-direction: column;
        height: 100%;
    }
    .stream-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--brand-shadow-hover);
        border-color: #CBD5E1;
    }
    .stream-thumb-wrap {
        position: relative;
        width: 100%;
        padding-top: 56.25%; /* 16:9 */
        background: #0F172A;
        overflow: hidden;
    }
    .stream-thumb-bg {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
        color: #475569;
        font-size: 2.8rem;
        transition: transform 0.4s ease;
    }
    .stream-card:hover .stream-thumb-bg {
        transform: scale(1.04);
        color: var(--brand-neon);
    }
    .thumb-tag-left {
        position: absolute;
        top: 10px;
        left: 10px;
        background: rgba(10, 14, 23, 0.82);
        color: var(--brand-neon);
        border: 1px solid rgba(0, 242, 254, 0.4);
        font-size: 0.75rem;
        font-weight: 600;
        padding: 0.2rem 0.6rem;
        border-radius: 4px;
        backdrop-filter: blur(4px);
    }
    .thumb-tag-right {
        position: absolute;
        bottom: 10px;
        right: 10px;
        background: rgba(0, 0, 0, 0.75);
        color: #FFFFFF;
        font-size: 0.725rem;
        padding: 0.18rem 0.5rem;
        border-radius: 4px;
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .thumb-route-badge {
        position: absolute;
        top: 10px;
        right: 10px;
        background: rgba(16, 185, 129, 0.2);
        color: #10B981;
        border: 1px solid rgba(16, 185, 129, 0.4);
        font-size: 0.725rem;
        font-weight: 600;
        padding: 0.15rem 0.5rem;
        border-radius: 4px;
    }
    .stream-body {
        padding: 1.25rem;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .stream-title {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--brand-text-primary);
        line-height: 1.45;
        margin-bottom: 0.6rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .stream-summary {
        font-size: 0.85rem;
        color: var(--brand-text-secondary);
        line-height: 1.6;
        margin-bottom: 1rem;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .stream-specs {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 0.75rem;
        border-top: 1px solid #F1F5F9;
        font-size: 0.775rem;
        color: var(--brand-text-muted);
    }
    .stream-route-ping {
        color: var(--brand-success);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }
    .stream-action-row {
        margin-top: 0.85rem;
    }
    .btn-stream-play {
        background: #F8FAFC;
        border: 1px solid var(--brand-border);
        color: var(--brand-text-primary);
        font-size: 0.85rem;
        font-weight: 600;
        padding: 0.5rem 0;
        border-radius: var(--brand-radius-btn);
        width: 100%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        transition: all 0.2s ease;
    }
    .btn-stream-play:hover {
        background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
        border-color: transparent;
        color: #0A0E17;
        box-shadow: 0 4px 12px rgba(0, 242, 254, 0.35);
    }
    .stream-pagination {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 8px;
        margin-top: 3rem;
    }
    .page-box {
        width: 38px;
        height: 38px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--brand-radius-btn);
        border: 1px solid var(--brand-border);
        background: #FFFFFF;
        font-size: 0.875rem;
        color: var(--brand-text-secondary);
        font-weight: 600;
        transition: all 0.2s ease;
    }
    .page-box:hover,
    .page-box.active {
        background: var(--brand-electric);
        color: #FFFFFF;
        border-color: var(--brand-electric);
    }
    /* 4. 热门细分子专题矩阵 */
    .subtopic-card {
        background: #FFFFFF;
        border: 1px solid var(--brand-border);
        border-radius: var(--brand-radius-card);
        padding: 1.5rem;
        transition: all 0.25s ease;
        display: flex;
        align-items: flex-start;
        gap: 1rem;
        height: 100%;
    }
    .subtopic-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--brand-shadow);
        border-color: #BEE3F8;
    }
    .subtopic-icon {
        width: 46px;
        height: 46px;
        border-radius: 8px;
        background: rgba(79, 172, 254, 0.1);
        color: #0284C7;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem;
        flex-shrink: 0;
    }
    .subtopic-title {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--brand-text-primary);
        margin-bottom: 0.35rem;
    }
    .subtopic-desc {
        font-size: 0.825rem;
        color: var(--brand-text-secondary);
        line-height: 1.6;
        margin-bottom: 0.5rem;
    }
    .subtopic-tag {
        font-size: 0.75rem;
        color: var(--brand-electric);
        font-weight: 600;
    }
    /* 5. 观影技术参数与播放指南 */
    .guide-box {
        background: #FFFFFF;
        border: 1px solid var(--brand-border);
        border-radius: var(--brand-radius-card);
        padding: 2rem;
        height: 100%;
        box-shadow: var(--brand-shadow);
    }
    .guide-icon-header {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 1.25rem;
    }
    .guide-icon-header i {
        font-size: 1.5rem;
        color: var(--brand-electric);
    }
    .guide-icon-header h3 {
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--brand-text-primary);
        margin: 0;
    }
    .guide-table {
        width: 100%;
        margin-top: 1rem;
        font-size: 0.85rem;
    }
    .guide-table td {
        padding: 0.55rem 0;
        border-bottom: 1px solid #F1F5F9;
    }
    .guide-table td:first-child {
        color: var(--brand-text-muted);
        width: 35%;
        font-weight: 500;
    }
    .guide-table td:last-child {
        color: var(--brand-text-primary);
        font-weight: 600;
    }
    .guide-tip-alert {
        margin-top: 1.25rem;
        padding: 0.85rem 1rem;
        background: #F8FAFC;
        border-left: 3px solid var(--brand-electric);
        font-size: 0.825rem;
        color: var(--brand-text-secondary);
        border-radius: 0 var(--brand-radius-btn) var(--brand-radius-btn) 0;
    }
    /* 6. FAQ 手风琴面板 */
    .accordion-custom .accordion-item {
        background: #FFFFFF;
        border: 1px solid var(--brand-border);
        border-radius: var(--brand-radius-card) !important;
        margin-bottom: 1rem;
        overflow: hidden;
        box-shadow: var(--brand-shadow);
    }
    .accordion-custom .accordion-button {
        background: #FFFFFF;
        color: var(--brand-text-primary);
        font-size: 1rem;
        font-weight: 600;
        padding: 1.15rem 1.4rem;
        box-shadow: none;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
        color: #0284C7;
        background: #F8FAFC;
        border-bottom: 1px solid var(--brand-border);
    }
    .accordion-custom .accordion-body {
        padding: 1.25rem 1.4rem;
        font-size: 0.925rem;
        color: var(--brand-text-secondary);
        line-height: 1.8;
    }
    /* 7. 轻量收尾订阅/唤起条 */
    .notify-cta-card {
        background: linear-gradient(135deg, #0A0E17 0%, #151D2C 100%);
        border-radius: var(--brand-radius-card);
        padding: 2.75rem 2.25rem;
        color: #FFFFFF;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    }
    .notify-cta-card h3 {
        font-size: 1.65rem;
        font-weight: 700;
        color: #FFFFFF;
        margin-bottom: 0.65rem;
    }
    .notify-cta-card p {
        color: #94A3B8;
        font-size: 0.925rem;
        max-width: 680px;
        margin-bottom: 1.5rem;
    }
    .subscribe-form-group {
        display: flex;
        max-width: 580px;
        gap: 10px;
    }
    .subscribe-input {
        flex: 1;
        background: #1E293B;
        border: 1px solid rgba(255, 255, 255, 0.15);
        color: #FFFFFF;
        padding: 0.65rem 1rem;
        border-radius: var(--brand-radius-btn);
        font-size: 0.9rem;
    }
    .subscribe-input:focus {
        outline: none;
        border-color: var(--brand-neon);
        box-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
    }
    .btn-subscribe {
        background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
        border: none;
        color: #0A0E17;
        font-weight: 700;
        font-size: 0.9rem;
        padding: 0 1.5rem;
        border-radius: var(--brand-radius-btn);
        cursor: pointer;
        transition: all 0.25s ease;
        white-space: nowrap;
    }
    .btn-subscribe:hover {
        box-shadow: 0 0 14px rgba(0, 242, 254, 0.6);
        transform: translateY(-1px);
    }
    /* 页脚 */
    .footer-custom {
        background-color: #0F172A;
        color: #94A3B8;
        padding: 4rem 0 2rem;
        font-size: 0.875rem;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand {
        font-size: 1.35rem;
        font-weight: 700;
        color: #FFFFFF;
    }
    .footer-desc {
        line-height: 1.8;
        margin-top: 0.75rem;
        color: #64748B;
        font-size: 0.85rem;
    }
    .footer-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: #E2E8F0;
        margin-bottom: 1.15rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-links li {
        margin-bottom: 0.65rem;
    }
    .footer-links a {
        color: #94A3B8;
    }
    .footer-links a:hover {
        color: var(--brand-neon);
        padding-left: 4px;
    }
    .footer-bottom {
        margin-top: 3.5rem;
        padding-top: 1.75rem;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        font-size: 0.825rem;
    }
    /* 响应式适配 */
    @media (max-width: 991px) {
        .subscribe-form-group {
            flex-direction: column;
        }
        .btn-subscribe {
            padding: 0.65rem 1rem;
        }
    }
    @media (max-width: 767px) {
        .category-topbar h1 {
            font-size: 1.65rem;
        }
        .filter-label {
            width: 100%;
            margin-bottom: 0.4rem;
        }
        .section-padding {
            padding: 3rem 0;
        }
    }

/* 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}