/* roulang page: index */
:root {
            --bg-base: #070B14;
            --bg-gradient-end: #0B132B;
            --card-bg: rgba(15, 23, 42, 0.72);
            --card-border: rgba(56, 189, 248, 0.18);
            --card-hover-border: rgba(0, 240, 255, 0.55);
            --neon-blue: #00f0ff;
            --sky-blue: #38bdf8;
            --ocean-blue: #0284c7;
            --deep-blue: #0f172a;
            --text-main: #E2E8F0;
            --text-muted: #94A3B8;
            --text-highlight: #F8FAFC;
            --accent-glow: rgba(56, 189, 248, 0.35);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-family);
            background: radial-gradient(circle at 50% 0%, #111d42 0%, var(--bg-base) 65%, var(--bg-gradient-end) 100%);
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            background-attachment: fixed;
        }

        a {
            color: var(--sky-blue);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--neon-blue);
        }

        /* 玻璃拟态容器卡片 */
        .glass-panel {
            background: var(--card-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
            transition: var(--transition);
        }

        .glass-panel:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 12px 35px var(--accent-glow);
        }

        /* 发光按钮 */
        .btn-glow-primary {
            background: linear-gradient(135deg, #0284c7, #00f0ff);
            color: #030712;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            box-shadow: 0 0 18px var(--accent-glow);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-glow-primary:hover {
            color: #000;
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }

        .btn-glow-outline {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid var(--sky-blue);
            color: var(--sky-blue);
            font-weight: 500;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-glow-outline:hover {
            background: rgba(56, 189, 248, 0.15);
            color: var(--neon-blue);
            border-color: var(--neon-blue);
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
            transform: translateY(-2px);
        }

        /* 徽章与标签药丸 */
        .badge-pill-tech {
            background: rgba(56, 189, 248, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.3);
            color: var(--neon-blue);
            border-radius: 50px;
            padding: 4px 14px;
            font-size: 0.82rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .badge-pill-tech .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: #10b981;
            box-shadow: 0 0 8px #10b981;
        }

        /* 顶层导航与底层频道行 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(7, 11, 20, 0.88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(56, 189, 248, 0.12);
        }

        .top-brand-bar {
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .brand-logo-text {
            font-size: 1.45rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-logo-text i {
            color: var(--neon-blue);
            filter: drop-shadow(0 0 8px var(--neon-blue));
        }

        .nav-search-box {
            position: relative;
            max-width: 380px;
            width: 100%;
        }

        .nav-search-input {
            width: 100%;
            background: rgba(15, 23, 42, 0.85);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 50px;
            padding: 7px 18px 7px 38px;
            color: #fff;
            font-size: 0.88rem;
            outline: none;
            transition: var(--transition);
        }

        .nav-search-input:focus {
            border-color: var(--neon-blue);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }

        .nav-search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .latency-indicator {
            font-size: 0.82rem;
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid rgba(16, 185, 129, 0.25);
            color: #34d399;
            padding: 4px 12px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .channel-pill-bar {
            padding: 8px 0;
            overflow-x: auto;
            white-space: nowrap;
        }

        .channel-pills {
            display: flex;
            gap: 12px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .channel-pill-link {
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid transparent;
            font-weight: 500;
        }

        .channel-pill-link:hover {
            color: #fff;
            background: rgba(56, 189, 248, 0.1);
            border-color: rgba(56, 189, 248, 0.25);
        }

        .channel-pill-link.active {
            color: #030712;
            background: var(--neon-blue);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        /* 核心板块标题通用 */
        .section-header {
            margin-bottom: 2.2rem;
        }

        .section-header .sub-title {
            color: var(--sky-blue);
            font-size: 0.88rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .section-header .main-title {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--text-highlight);
        }

        .section-header .desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 820px;
            margin-top: 8px;
        }

        /* 1. Hero 工业参数首屏 */
        .hero-section {
            padding: 70px 0 50px;
            position: relative;
        }

        .hero-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 1.2rem;
        }

        .hero-title span {
            background: linear-gradient(135deg, #38bdf8 0%, #00f0ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 1.8rem;
        }

        .param-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 2rem;
        }

        .param-chip {
            background: rgba(30, 41, 59, 0.6);
            border: 1px solid rgba(56, 189, 248, 0.2);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            color: var(--text-main);
        }

        .param-chip b {
            color: var(--neon-blue);
            margin-right: 4px;
        }

        .hero-stat-card {
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.5);
        }

        .metric-dial {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .metric-dial-box {
            background: rgba(2, 6, 23, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.05);
            padding: 16px;
            border-radius: var(--radius-sm);
            text-align: center;
        }

        .metric-dial-box .val {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--neon-blue);
        }

        .metric-dial-box .label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 货架卡片 */
        .shelf-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .shelf-card:hover {
            border-color: var(--neon-blue);
            transform: translateY(-4px);
            box-shadow: 0 12px 25px rgba(0, 240, 255, 0.25);
        }

        .shelf-thumb {
            height: 140px;
            background: linear-gradient(135deg, #1e293b, #0f172a);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .shelf-thumb i {
            font-size: 3rem;
            color: rgba(56, 189, 248, 0.35);
            transition: var(--transition);
        }

        .shelf-card:hover .shelf-thumb i {
            color: var(--neon-blue);
            transform: scale(1.1);
        }

        .shelf-tag {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(3, 7, 18, 0.8);
            color: var(--sky-blue);
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            border: 1px solid rgba(56, 189, 248, 0.3);
        }

        .shelf-body {
            padding: 16px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .shelf-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .shelf-text {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            flex-grow: 1;
        }

        .shelf-meta {
            font-size: 0.78rem;
            color: var(--sky-blue);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 8px;
            display: flex;
            justify-content: space-between;
        }

        /* 3. 参数对比表 */
        .tech-table {
            width: 100%;
            margin-bottom: 0;
            border-collapse: separate;
            border-spacing: 0;
        }

        .tech-table th {
            background: rgba(30, 41, 59, 0.8);
            color: var(--neon-blue);
            font-size: 0.9rem;
            padding: 14px 18px;
            border-bottom: 1px solid rgba(56, 189, 248, 0.2);
        }

        .tech-table td {
            background: rgba(15, 23, 42, 0.6);
            color: var(--text-main);
            font-size: 0.88rem;
            padding: 14px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .tech-table tr:hover td {
            background: rgba(56, 189, 248, 0.08);
        }

        /* 4. 时间轴历程 */
        .timeline-box {
            position: relative;
            padding-left: 28px;
            border-left: 2px solid rgba(56, 189, 248, 0.3);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 24px;
        }

        .timeline-dot {
            position: absolute;
            left: -35px;
            top: 4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--neon-blue);
            box-shadow: 0 0 10px var(--neon-blue);
        }

        /* 5. 资讯卡 */
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 20px;
            height: 100%;
            transition: var(--transition);
        }

        .article-card:hover {
            border-color: var(--sky-blue);
            transform: translateY(-3px);
        }

        .article-date {
            font-size: 0.78rem;
            color: var(--sky-blue);
            margin-bottom: 8px;
        }

        /* 6. 平台保障徽章 */
        .badge-guarantee-card {
            background: rgba(15, 23, 42, 0.65);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .badge-guarantee-card:hover {
            border-color: var(--neon-blue);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.2);
        }

        .badge-guarantee-icon {
            font-size: 2.4rem;
            color: var(--neon-blue);
            margin-bottom: 12px;
        }

        /* 7. 快速排查窗 */
        .troubleshoot-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            margin-bottom: 18px;
        }

        .step-num {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            background: rgba(56, 189, 248, 0.15);
            border: 1px solid var(--sky-blue);
            color: var(--neon-blue);
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
        }

        /* 8. FAQ 手风琴 */
        .accordion-item {
            background: var(--card-bg) !important;
            border: 1px solid var(--card-border) !important;
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-button {
            background: rgba(15, 23, 42, 0.75) !important;
            color: #fff !important;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: none !important;
            padding: 16px 20px;
        }

        .accordion-button:not(.collapsed) {
            color: var(--neon-blue) !important;
            border-bottom: 1px solid rgba(56, 189, 248, 0.2);
        }

        .accordion-button::after {
            filter: invert(1);
        }

        .accordion-body {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 18px 20px;
        }

        /* 9. 表单样式 */
        .form-tech-control {
            background: rgba(10, 16, 30, 0.85);
            border: 1px solid rgba(56, 189, 248, 0.25);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.9rem;
        }

        .form-tech-control:focus {
            background: rgba(10, 16, 30, 0.95);
            border-color: var(--neon-blue);
            color: #fff;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }

        /* 11. 分类入口大卡 */
        .category-gate-card {
            background: linear-gradient(145deg, rgba(15, 23, 42, 0.8), rgba(30, 41, 59, 0.7));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }

        .category-gate-card:hover {
            border-color: var(--neon-blue);
            transform: translateY(-4px);
            box-shadow: 0 15px 35px rgba(0, 240, 255, 0.25);
        }

        .gate-badge {
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--neon-blue);
            color: var(--neon-blue);
            font-size: 0.78rem;
            padding: 3px 10px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 12px;
        }

        /* 页脚 */
        .site-footer {
            background: #04070d;
            border-top: 1px solid rgba(56, 189, 248, 0.15);
            padding: 50px 0 25px;
            margin-top: 80px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-logo i {
            color: var(--neon-blue);
        }

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

        .footer-nav-list li {
            margin-bottom: 8px;
        }

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

        .footer-nav-list a:hover {
            color: var(--neon-blue);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 36px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 移动端与响应式断点微调 */
        @media (max-width: 991.98px) {
            .hero-title {
                font-size: 2.15rem;
            }
            .hero-section {
                padding: 40px 0 30px;
            }
        }

        @media (max-width: 767.98px) {
            .top-brand-bar .d-flex {
                flex-direction: column;
                gap: 12px;
                align-items: stretch !important;
            }
            .nav-search-box {
                max-width: 100%;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .metric-dial {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category1 */
:root {
            --bg-base: #070B14;
            --bg-gradient-end: #0B132B;
            --card-bg: rgba(15, 23, 42, 0.72);
            --card-border: rgba(56, 189, 248, 0.18);
            --card-hover-border: rgba(0, 240, 255, 0.55);
            --neon-blue: #00f0ff;
            --sky-blue: #38bdf8;
            --ocean-blue: #0284c7;
            --deep-blue: #0f172a;
            --text-main: #E2E8F0;
            --text-muted: #94A3B8;
            --text-highlight: #F8FAFC;
            --accent-glow: rgba(56, 189, 248, 0.35);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        body {
            font-family: var(--font-family);
            background: radial-gradient(circle at 50% 0%, #111d42 0%, var(--bg-base) 65%, var(--bg-gradient-end) 100%);
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
            background-attachment: fixed;
        }
        a {
            color: var(--sky-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--neon-blue);
        }
        .btn-glow-primary {
            background: linear-gradient(135deg, #0284c7, #00f0ff);
            color: #030712;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            box-shadow: 0 0 18px var(--accent-glow);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .btn-glow-primary:hover {
            color: #000;
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
        }
        .btn-glow-outline {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid var(--sky-blue);
            color: var(--sky-blue);
            font-weight: 500;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .btn-glow-outline:hover {
            background: rgba(56, 189, 248, 0.15);
            color: var(--neon-blue);
            border-color: var(--neon-blue);
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
            transform: translateY(-2px);
        }
        .badge-pill-tech {
            background: rgba(56, 189, 248, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.3);
            color: var(--neon-blue);
            border-radius: 50px;
            padding: 4px 14px;
            font-size: 0.82rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .badge-pill-tech .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: #10b981;
            box-shadow: 0 0 8px #10b981;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(7, 11, 20, 0.88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(56, 189, 248, 0.12);
        }
        .top-brand-bar {
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .brand-logo-text {
            font-size: 1.45rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-logo-text i {
            color: var(--neon-blue);
            filter: drop-shadow(0 0 8px var(--neon-blue));
        }
        .nav-search-box {
            position: relative;
            max-width: 380px;
            width: 100%;
        }
        .nav-search-input {
            width: 100%;
            background: rgba(15, 23, 42, 0.85);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 50px;
            padding: 7px 18px 7px 38px;
            color: #fff;
            font-size: 0.88rem;
            outline: none;
            transition: var(--transition);
        }
        .nav-search-input:focus {
            border-color: var(--neon-blue);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .nav-search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .latency-indicator {
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(16, 185, 129, 0.3);
            border-radius: 30px;
            padding: 4px 14px;
            font-size: 0.82rem;
            color: #34d399;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .channel-pill-bar {
            padding: 8px 0;
            overflow-x: auto;
            white-space: nowrap;
        }
        .channel-pills {
            display: flex;
            gap: 12px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .channel-pill-link {
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid transparent;
            font-weight: 500;
        }
        .channel-pill-link:hover {
            color: #fff;
            background: rgba(56, 189, 248, 0.1);
            border-color: rgba(56, 189, 248, 0.25);
        }
        .channel-pill-link.active {
            color: #030712;
            background: var(--neon-blue);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }

        /* 紧凑标题数据条 */
        .category-header-strip {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(7, 11, 20, 0.7) 100%);
            border-bottom: 1px solid var(--card-border);
            padding: 32px 0 28px;
            position: relative;
        }
        .cat-h1-title {
            font-size: 1.85rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 10px;
        }
        .cat-h1-title span {
            color: var(--neon-blue);
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }
        .cat-metrics-box {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .metric-pill-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .metric-pill-item .val {
            font-weight: 700;
            color: var(--neon-blue);
            font-size: 1.15rem;
        }
        .metric-pill-item .lbl {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 维度筛选货架 */
        .filter-matrix-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            padding: 22px 24px;
            margin-top: -20px;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.45);
        }
        .filter-row {
            display: flex;
            align-items: center;
            padding: 9px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .filter-row:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .filter-label {
            width: 90px;
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--sky-blue);
            font-weight: 600;
        }
        .filter-options {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .filter-btn {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(56, 189, 248, 0.15);
            color: var(--text-muted);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-btn:hover, .filter-btn.active {
            background: rgba(56, 189, 248, 0.2);
            color: var(--neon-blue);
            border-color: var(--neon-blue);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }

        /* 视频流与解析卡片 */
        .media-grid-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
            position: relative;
        }
        .media-grid-item:hover {
            border-color: var(--card-hover-border);
            transform: translateY(-4px);
            box-shadow: 0 12px 25px rgba(0, 240, 255, 0.18);
        }
        .media-poster-wrap {
            position: relative;
            background: #0d1527;
            padding-top: 56.25%;
            overflow: hidden;
        }
        .media-poster-placeholder {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #101c3d 0%, #070b14 100%);
            color: var(--sky-blue);
            font-size: 2.2rem;
        }
        .media-badge-res {
            position: absolute;
            top: 10px;
            left: 10px;
            background: rgba(0, 0, 0, 0.75);
            border: 1px solid var(--neon-blue);
            color: var(--neon-blue);
            font-size: 0.7rem;
            padding: 2px 7px;
            border-radius: 4px;
            font-weight: 700;
        }
        .media-badge-duration {
            position: absolute;
            bottom: 8px;
            right: 8px;
            background: rgba(7, 11, 20, 0.85);
            color: #fff;
            font-size: 0.72rem;
            padding: 2px 6px;
            border-radius: 4px;
        }
        .media-info-body {
            padding: 16px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .media-title {
            font-size: 0.96rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.45;
        }
        .media-meta-tags {
            display: flex;
            gap: 6px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .media-meta-tag {
            font-size: 0.72rem;
            padding: 2px 8px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 4px;
            color: var(--text-muted);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .media-action-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* 测速与监测面板 */
        .telemetry-radar-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 28px;
            backdrop-filter: blur(16px);
        }
        .radar-bar-group {
            margin-bottom: 16px;
        }
        .radar-bar-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            margin-bottom: 6px;
        }
        .radar-progress {
            height: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 10px;
            overflow: hidden;
        }
        .radar-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #0284c7, #00f0ff);
            border-radius: 10px;
            box-shadow: 0 0 10px var(--neon-blue);
        }

        /* 专题卡片组 */
        .feature-topic-card {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition);
        }
        .feature-topic-card:hover {
            border-color: var(--neon-blue);
            background: rgba(15, 23, 42, 0.8);
            transform: translateY(-3px);
        }

        /* FAQ 手风琴重构 */
        .accordion-custom .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: rgba(15, 23, 42, 0.8);
            color: #fff;
            font-weight: 600;
            border: none;
            box-shadow: none;
            padding: 16px 20px;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--neon-blue);
            background: rgba(2, 132, 199, 0.15);
            border-bottom: 1px solid var(--card-border);
        }
        .accordion-custom .accordion-button::after {
            filter: invert(1) hue-rotate(180deg);
        }
        .accordion-custom .accordion-body {
            color: var(--text-main);
            padding: 18px 20px;
            font-size: 0.92rem;
            background: rgba(11, 19, 43, 0.6);
        }

        /* 反馈表单 */
        .feedback-bar {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 24px 30px;
        }

        /* 页脚 */
        .site-footer {
            background: #04070d;
            border-top: 1px solid rgba(56, 189, 248, 0.12);
            padding: 55px 0 25px;
            margin-top: 70px;
        }
        .footer-title {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.8;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-links a:hover {
            color: var(--neon-blue);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 25px;
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
        }

        @media (max-width: 768px) {
            .cat-h1-title { font-size: 1.45rem; }
            .filter-label { width: 100%; margin-bottom: 6px; }
            .filter-row { flex-direction: column; align-items: flex-start; }
            .metric-pill-item { flex: 1 1 45%; }
        }

/* roulang page: category2 */
:root {
        --bg-base: #070B14;
        --bg-gradient-end: #0B132B;
        --card-bg: rgba(15, 23, 42, 0.72);
        --card-border: rgba(56, 189, 248, 0.18);
        --card-hover-border: rgba(0, 240, 255, 0.55);
        --neon-blue: #00f0ff;
        --sky-blue: #38bdf8;
        --ocean-blue: #0284c7;
        --deep-blue: #0f172a;
        --text-main: #E2E8F0;
        --text-muted: #94A3B8;
        --text-highlight: #F8FAFC;
        --accent-glow: rgba(56, 189, 248, 0.35);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    body {
        font-family: var(--font-family);
        background: radial-gradient(circle at 50% 0%, #111d42 0%, var(--bg-base) 65%, var(--bg-gradient-end) 100%);
        background-color: var(--bg-base);
        color: var(--text-main);
        line-height: 1.75;
        min-height: 100vh;
        overflow-x: hidden;
        background-attachment: fixed;
    }
    a {
        color: var(--sky-blue);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--neon-blue);
    }

    /* 发光按钮 */
    .btn-glow-primary {
        background: linear-gradient(135deg, #0284c7, #00f0ff);
        color: #030712;
        font-weight: 600;
        border: none;
        border-radius: var(--radius-sm);
        padding: 10px 24px;
        box-shadow: 0 0 18px var(--accent-glow);
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }
    .btn-glow-primary:hover {
        color: #000;
        transform: translateY(-2px) scale(1.02);
        box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
    }
    .btn-glow-outline {
        background: rgba(15, 23, 42, 0.6);
        border: 1px solid var(--sky-blue);
        color: var(--sky-blue);
        font-weight: 500;
        border-radius: var(--radius-sm);
        padding: 10px 24px;
        backdrop-filter: blur(8px);
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }
    .btn-glow-outline:hover {
        background: rgba(56, 189, 248, 0.15);
        color: var(--neon-blue);
        border-color: var(--neon-blue);
        box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
        transform: translateY(-2px);
    }

    /* 徽章与标签药丸 */
    .badge-pill-tech {
        background: rgba(56, 189, 248, 0.12);
        border: 1px solid rgba(56, 189, 248, 0.3);
        color: var(--neon-blue);
        border-radius: 50px;
        padding: 4px 14px;
        font-size: 0.82rem;
        font-weight: 500;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .badge-pill-tech .dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background-color: #10b981;
        box-shadow: 0 0 8px #10b981;
    }

    /* 顶层导航与底层频道行 */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1030;
        background: rgba(7, 11, 20, 0.88);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(56, 189, 248, 0.12);
    }
    .top-brand-bar {
        padding: 14px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .brand-logo-text {
        font-size: 1.45rem;
        font-weight: 800;
        color: #fff;
        letter-spacing: -0.5px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .brand-logo-text i {
        color: var(--neon-blue);
        filter: drop-shadow(0 0 8px var(--neon-blue));
    }
    .nav-search-box {
        position: relative;
        max-width: 380px;
        width: 100%;
    }
    .nav-search-input {
        width: 100%;
        background: rgba(15, 23, 42, 0.85);
        border: 1px solid rgba(56, 189, 248, 0.2);
        border-radius: 50px;
        padding: 7px 18px 7px 38px;
        color: #fff;
        font-size: 0.88rem;
        outline: none;
        transition: var(--transition);
    }
    .nav-search-input:focus {
        border-color: var(--neon-blue);
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
    }
    .nav-search-icon {
        position: absolute;
        left: 14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-muted);
        font-size: 0.85rem;
    }
    .channel-pill-bar {
        padding: 8px 0;
        overflow-x: auto;
        white-space: nowrap;
    }
    .channel-pills {
        display: flex;
        gap: 12px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .channel-pill-link {
        padding: 6px 18px;
        border-radius: 30px;
        font-size: 0.9rem;
        color: var(--text-muted);
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid transparent;
        font-weight: 500;
        display: inline-flex;
        align-items: center;
    }
    .channel-pill-link:hover {
        color: #fff;
        background: rgba(56, 189, 248, 0.1);
        border-color: rgba(56, 189, 248, 0.25);
    }
    .channel-pill-link.active {
        color: #030712;
        background: var(--neon-blue);
        font-weight: 600;
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
    }

    /* 状态指示器 */
    .latency-indicator {
        font-size: 0.82rem;
        color: var(--text-muted);
        background: rgba(15, 23, 42, 0.7);
        border: 1px solid rgba(56, 189, 248, 0.15);
        padding: 6px 14px;
        border-radius: 30px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    /* 分类紧凑条 (Section 1) */
    .category-top-banner {
        background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(7, 11, 20, 0.6) 100%);
        border-bottom: 1px solid var(--card-border);
        padding: 2.2rem 0 1.8rem;
    }
    .cat-main-h1 {
        font-size: 1.85rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 0.5rem;
        letter-spacing: -0.5px;
    }
    .cat-stat-chip {
        background: rgba(2, 132, 199, 0.12);
        border: 1px solid rgba(56, 189, 248, 0.25);
        padding: 6px 14px;
        border-radius: var(--radius-sm);
        font-size: 0.85rem;
        color: var(--text-main);
    }
    .cat-stat-chip strong {
        color: var(--neon-blue);
        font-weight: 700;
    }

    /* 筛选矩阵 (Section 2) */
    .filter-matrix-box {
        background: var(--card-bg);
        border: 1px solid var(--card-border);
        border-radius: var(--radius-md);
        padding: 1.5rem;
        backdrop-filter: blur(14px);
        margin-top: 2rem;
        margin-bottom: 2.5rem;
    }
    .filter-row {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 10px;
        padding: 8px 0;
        border-bottom: 1px dashed rgba(255, 255, 255, 0.07);
    }
    .filter-row:last-child {
        border-bottom: none;
    }
    .filter-label {
        width: 85px;
        font-size: 0.85rem;
        color: var(--text-muted);
        font-weight: 600;
        flex-shrink: 0;
    }
    .filter-item {
        padding: 4px 14px;
        font-size: 0.82rem;
        border-radius: 20px;
        color: var(--text-main);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid transparent;
        cursor: pointer;
        transition: var(--transition);
        user-select: none;
    }
    .filter-item:hover {
        background: rgba(56, 189, 248, 0.12);
        color: var(--sky-blue);
        border-color: rgba(56, 189, 248, 0.3);
    }
    .filter-item.active {
        background: rgba(0, 240, 255, 0.18);
        border-color: var(--neon-blue);
        color: var(--neon-blue);
        font-weight: 600;
        box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }

    /* 核心卡片列表 (Section 3) */
    .stream-card {
        background: var(--card-bg);
        border: 1px solid var(--card-border);
        border-radius: var(--radius-md);
        backdrop-filter: blur(12px);
        overflow: hidden;
        transition: var(--transition);
        height: 100%;
        display: flex;
        flex-direction: column;
        position: relative;
    }
    .stream-card:hover {
        transform: translateY(-4px);
        border-color: var(--card-hover-border);
        box-shadow: 0 8px 24px rgba(0, 240, 255, 0.15);
    }
    .stream-thumb-wrap {
        position: relative;
        width: 100%;
        aspect-ratio: 16 / 9;
        background: #0d1527;
        overflow: hidden;
    }
    .stream-thumb-wrap svg, .stream-thumb-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.85;
        transition: var(--transition);
    }
    .stream-card:hover .stream-thumb-wrap svg {
        transform: scale(1.05);
        opacity: 1;
    }
    .badge-resolution {
        position: absolute;
        top: 10px;
        left: 10px;
        background: rgba(0, 0, 0, 0.75);
        border: 1px solid var(--neon-blue);
        color: var(--neon-blue);
        font-size: 0.72rem;
        font-weight: 700;
        padding: 2px 8px;
        border-radius: 4px;
        backdrop-filter: blur(4px);
    }
    .badge-duration {
        position: absolute;
        bottom: 10px;
        right: 10px;
        background: rgba(0, 0, 0, 0.8);
        color: #fff;
        font-size: 0.72rem;
        padding: 2px 6px;
        border-radius: 4px;
    }
    .stream-card-body {
        padding: 1.1rem;
        display: flex;
        flex-direction: column;
        flex-grow: 1;
    }
    .stream-card-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 0.5rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .stream-card-specs {
        font-size: 0.78rem;
        color: var(--text-muted);
        margin-bottom: 0.75rem;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .stream-meta-pills {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
        margin-top: auto;
        padding-top: 8px;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .meta-sub-pill {
        font-size: 0.7rem;
        padding: 2px 8px;
        border-radius: 4px;
        background: rgba(255, 255, 255, 0.05);
        color: var(--sky-blue);
    }

    /* 性能监测板块 (Section 4) */
    .metric-panel {
        background: rgba(15, 23, 42, 0.65);
        border: 1px solid var(--card-border);
        border-radius: var(--radius-md);
        padding: 1.5rem;
        backdrop-filter: blur(12px);
    }
    .metric-val {
        font-size: 1.8rem;
        font-weight: 800;
        color: var(--neon-blue);
        line-height: 1;
    }
    .metric-sub {
        font-size: 0.82rem;
        color: var(--text-muted);
        margin-top: 6px;
    }
    .meter-bar {
        height: 6px;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 4px;
        overflow: hidden;
        margin-top: 10px;
    }
    .meter-bar-fill {
        height: 100%;
        background: linear-gradient(90deg, #0284c7, #00f0ff);
        border-radius: 4px;
    }

    /* 专题精选推荐 (Section 5) */
    .feature-curated-card {
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(2, 132, 199, 0.15) 100%);
        border: 1px solid var(--card-border);
        border-radius: var(--radius-md);
        padding: 1.5rem;
        transition: var(--transition);
        height: 100%;
    }
    .feature-curated-card:hover {
        border-color: var(--neon-blue);
        transform: translateY(-3px);
    }

    /* FAQ折叠手风琴 (Section 6) */
    .accordion-item-tech {
        background: var(--card-bg) !important;
        border: 1px solid var(--card-border) !important;
        border-radius: var(--radius-sm) !important;
        margin-bottom: 12px;
        overflow: hidden;
    }
    .accordion-btn-tech {
        background: transparent !important;
        color: #fff !important;
        font-weight: 600;
        font-size: 0.96rem;
        box-shadow: none !important;
        padding: 1.1rem 1.25rem;
    }
    .accordion-btn-tech:not(.collapsed) {
        color: var(--neon-blue) !important;
        background: rgba(56, 189, 248, 0.08) !important;
    }
    .accordion-btn-tech::after {
        filter: invert(1);
    }
    .accordion-body-tech {
        padding: 1.2rem 1.25rem;
        font-size: 0.88rem;
        color: var(--text-main);
        line-height: 1.8;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 线路求源反馈表单 (Section 7) */
    .compact-feedback-box {
        background: radial-gradient(circle at 10% 50%, rgba(2, 132, 199, 0.18) 0%, rgba(15, 23, 42, 0.85) 100%);
        border: 1px solid var(--card-border);
        border-radius: var(--radius-lg);
        padding: 2.2rem;
        backdrop-filter: blur(16px);
        margin-bottom: 4rem;
    }
    .form-tech-input {
        background: rgba(7, 11, 20, 0.7);
        border: 1px solid rgba(56, 189, 248, 0.25);
        color: #fff;
        border-radius: var(--radius-sm);
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    .form-tech-input:focus {
        background: rgba(7, 11, 20, 0.95);
        border-color: var(--neon-blue);
        box-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
        color: #fff;
    }
    .form-tech-input::placeholder {
        color: var(--text-muted);
        font-size: 0.85rem;
    }

    /* 页脚 */
    .site-footer {
        background: #04070d;
        border-top: 1px solid rgba(56, 189, 248, 0.12);
        padding: 3.5rem 0 2rem;
        font-size: 0.88rem;
    }
    .footer-title {
        color: #fff;
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 1.2rem;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .footer-desc {
        color: var(--text-muted);
        line-height: 1.8;
        margin-bottom: 1.2rem;
        font-size: 0.85rem;
    }
    .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-links li {
        margin-bottom: 0.6rem;
    }
    .footer-links a {
        color: var(--text-muted);
        font-size: 0.85rem;
    }
    .footer-links a:hover {
        color: var(--neon-blue);
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 1.8rem;
        margin-top: 2rem;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        font-size: 0.8rem;
        color: var(--text-muted);
    }

/* 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}