/* roulang page: index */
:root {
            --bg: #F5F8FC;
            --surface: #FFFFFF;
            --brand: #2D7FF9;
            --brand-dark: #1D5FD0;
            --brand-soft: #EAF2FE;
            --accent: #F5A623;
            --accent-soft: #FEF5E6;
            --text-primary: #1E293B;
            --text-secondary: #5B6C82;
            --text-tertiary: #94A3B8;
            --border: #E3EAF2;
            --shadow-sm: 0 1px 2px rgba(30, 41, 59, .04);
            --shadow-md: 0 4px 20px rgba(30, 41, 59, .08);
            --shadow-lg: 0 12px 32px rgba(30, 41, 59, .12);
            --radius: 16px;
            --radius-btn: 10px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            vertical-align: middle;
        }
        a {
            color: var(--brand);
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: var(--brand-dark);
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1280px;
            width: 100%;
            padding-right: 24px;
            padding-left: 24px;
            margin-right: auto;
            margin-left: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: 1.5px solid transparent;
            transition: all .25s ease;
            cursor: pointer;
            white-space: nowrap;
            outline: none;
        }
        .btn-main {
            background: var(--brand);
            color: #fff;
            border-color: var(--brand);
        }
        .btn-main:hover {
            background: var(--brand-dark);
            border-color: var(--brand-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(45, 127, 249, .28);
        }
        .btn-main:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-main:focus-visible {
            box-shadow: 0 0 0 3px rgba(45, 127, 249, .25);
        }
        .btn-outline-main {
            background: var(--surface);
            color: var(--brand);
            border-color: var(--brand);
        }
        .btn-outline-main:hover {
            background: var(--brand-soft);
            color: var(--brand-dark);
            border-color: var(--brand-dark);
        }
        .btn-outline-main:active {
            transform: translateY(0);
            background: var(--brand-soft);
        }
        .btn-outline-main:focus-visible {
            box-shadow: 0 0 0 3px rgba(45, 127, 249, .18);
        }
        .btn-md {
            padding: 10px 20px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }
        .section {
            padding: 80px 0;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 520px;
            line-height: 1.7;
            margin-top: 8px;
        }
        .section-more {
            color: var(--brand);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        .section-more:hover {
            color: var(--brand-dark);
        }
        .section-more i {
            font-size: 12px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .brand-row {
            min-height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--brand-soft);
            color: var(--brand);
            font-size: 18px;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .header-search {
            position: relative;
            flex: 0 1 360px;
            margin-left: auto;
            margin-right: auto;
        }
        .header-search i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-tertiary);
            font-size: 14px;
            pointer-events: none;
        }
        .header-search input {
            width: 100%;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0 16px 0 40px;
            background: var(--bg);
            font-size: 14px;
            color: var(--text-primary);
            outline: none;
            transition: all .2s;
        }
        .header-search input::placeholder {
            color: var(--text-tertiary);
        }
        .header-search input:focus {
            border-color: var(--brand);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(45, 127, 249, .12);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .navbar-toggler {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--text-primary);
            font-size: 18px;
            cursor: pointer;
            padding: 0;
        }
        .navbar-toggler:focus {
            outline: none;
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(45, 127, 249, .15);
        }
        .navbar-toggler i {
            font-size: 20px;
            line-height: 1;
        }
        .channel-row {
            border-top: 1px solid var(--border);
            min-height: 48px;
            display: flex;
            align-items: stretch;
        }
        .channel-list {
            display: flex;
            gap: 0;
            margin: 0;
            padding: 0;
            height: 100%;
            align-items: center;
        }
        .channel-list>li {
            list-style: none;
            height: 100%;
            display: flex;
            align-items: center;
            margin: 0;
        }
        .channel-list a {
            display: inline-flex;
            align-items: center;
            padding: 0 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            height: 48px;
            line-height: 48px;
            border-bottom: 2px solid transparent;
            transition: all .2s;
            white-space: nowrap;
        }
        .channel-list a:hover {
            color: var(--brand);
            background: var(--brand-soft);
            text-decoration: none;
        }
        .channel-list a.active {
            color: var(--brand);
            border-bottom-color: var(--brand);
            background: transparent;
        }
        .mobile-channel {
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .mobile-search {
            margin-bottom: 12px;
        }
        .mobile-search input {
            width: 100%;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0 16px 0 38px;
            background: var(--bg);
            font-size: 14px;
            outline: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001q.044.06.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1 1 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: 14px center;
        }
        .mobile-search input:focus {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(45, 127, 249, .12);
        }
        .mobile-channel-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin: 0;
            padding: 0;
            width: 100%;
        }
        .mobile-channel-list a {
            display: block;
            padding: 12px 4px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border);
            transition: all .2s;
        }
        .mobile-channel-list a:hover {
            color: var(--brand);
            background: var(--brand-soft);
            padding-left: 10px;
        }
        .mobile-channel-list a.active {
            color: var(--brand);
        }

        /* ===== Hero ===== */
        .hero {
            padding: 96px 0 0;
            position: relative;
            overflow: hidden;
            background:
                radial-gradient(circle at 85% 20%, rgba(45, 127, 249, .10) 0%, transparent 42%),
                linear-gradient(rgba(45, 127, 249, .03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(45, 127, 249, .03) 1px, transparent 1px);
            background-size: auto, 56px 56px, 56px 56px;
        }
        .hero .container {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .hero-left {
            flex: 1 1 55%;
            max-width: 640px;
            padding-bottom: 80px;
        }
        .hero-right {
            flex: 1 1 45%;
            position: relative;
            padding-bottom: 80px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-soft);
            color: #B87B0A;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 24px;
            border: 1px solid rgba(245, 166, 35, .18);
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: .5px;
        }
        .hero-title .highlight {
            color: var(--brand);
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .trust-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-tertiary);
        }
        .trust-bar span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .trust-bar span::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--brand);
            opacity: .5;
            margin-right: 4px;
        }
        .trust-bar span:first-child::before {
            display: none;
        }
        .hero-image-wrap {
            position: relative;
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }
        .hero-image-wrap img {
            width: 100%;
            height: 460px;
            object-fit: cover;
            display: block;
            border-radius: 20px;
        }
        .hero-float-card {
            position: absolute;
            bottom: -32px;
            left: -32px;
            background: var(--surface);
            border-radius: 14px;
            padding: 18px 22px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 14px;
            border: 1px solid var(--border);
        }
        .hero-float-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1;
        }
        .hero-float-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        /* ===== 指标看板 ===== */
        .metrics {
            padding: 56px 0 0;
        }
        .metrics-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            overflow: hidden;
            margin-bottom: 40px;
        }
        .metric-item {
            padding: 32px 28px;
            border-right: 1px solid var(--border);
            text-align: left;
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .metric-desc {
            font-size: 12px;
            color: var(--text-tertiary);
            line-height: 1.5;
        }

        /* ===== 服务矩阵 ===== */
        .services {
            padding: 80px 0;
        }
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px 24px;
            box-shadow: var(--shadow-md);
            position: relative;
            border: 1px solid var(--border);
            transition: all .25s ease;
            display: flex;
            flex-direction: column;
            min-height: 240px;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 2px;
            background: var(--brand);
            border-radius: 0 0 2px 2px;
            opacity: 0;
            transition: opacity .25s;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand-soft);
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            transition: all .25s;
        }
        .service-card:nth-child(even) .service-icon {
            background: var(--accent-soft);
            color: var(--accent);
        }
        .service-card:hover .service-icon {
            background: var(--brand);
            color: #fff;
            transform: scale(1.05);
        }
        .service-badge {
            font-size: 12px;
            font-weight: 700;
            color: var(--brand);
            background: var(--brand-soft);
            border-radius: 8px;
            padding: 4px 10px;
            line-height: 1;
        }
        .service-card:nth-child(even) .service-badge {
            background: var(--accent-soft);
            color: var(--accent);
        }
        .service-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .service-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex-grow: 1;
            margin-bottom: 16px;
        }
        .service-data {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .service-data-line {
            flex: 1;
            height: 4px;
            background: var(--bg);
            border-radius: 2px;
            overflow: hidden;
        }
        .service-data-line span {
            display: block;
            height: 100%;
            background: var(--brand);
            border-radius: 2px;
        }
        .service-data-num {
            font-size: 12px;
            font-weight: 700;
            color: var(--brand);
            white-space: nowrap;
        }
        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s;
        }
        .service-link:hover {
            color: var(--brand-dark);
            gap: 8px;
        }
        .service-link i {
            font-size: 12px;
        }

        /* ===== 资讯动态 ===== */
        .news {
            background: var(--bg);
            padding: 80px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .news-wrap {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            padding: 22px 0;
            border-bottom: 1px solid var(--border);
            transition: padding-left .2s;
            display: block;
        }
        .news-item:first-child {
            padding-top: 0;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            padding-left: 8px;
        }
        .news-item-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.5;
            transition: color .2s;
        }
        .news-item:hover .news-item-title {
            color: var(--brand);
        }
        .news-item-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-item-meta {
            font-size: 12px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .news-item-meta .tag {
            background: var(--brand-soft);
            color: var(--brand);
            padding: 2px 8px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .news-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }
        .news-card-img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            display: block;
        }
        .news-card-body {
            padding: 18px 20px;
        }
        .news-card-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-card-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .hot-rank-list {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
        }
        .hot-rank-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .hot-rank-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .hot-rank-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .hot-rank-num {
            font-size: 15px;
            font-weight: 800;
            color: var(--text-tertiary);
            line-height: 1.6;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .hot-rank-item:nth-child(1) .hot-rank-num,
        .hot-rank-item:nth-child(2) .hot-rank-num,
        .hot-rank-item:nth-child(3) .hot-rank-num {
            color: var(--accent);
        }
        .hot-rank-item a {
            font-size: 14px;
            color: var(--text-primary);
            font-weight: 500;
            line-height: 1.5;
            transition: color .2s;
        }
        .hot-rank-item a:hover {
            color: var(--brand);
        }

        /* ===== 保障图标条 ===== */
        .guarantee {
            padding: 60px 0;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .guarantee-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--brand-soft);
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .guarantee-item-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .guarantee-item-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 结果对比 ===== */
        .compare {
            padding: 80px 0;
        }
        .compare-badge-wrap {
            display: flex;
            justify-content: center;
            margin-bottom: 40px;
        }
        .compare-vs-badge {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 24px;
            font-size: 14px;
            font-weight: 700;
            color: var(--text-secondary);
            box-shadow: var(--shadow-sm);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .compare-panel {
            border-radius: var(--radius);
            padding: 32px 28px;
            min-height: 360px;
            display: flex;
            flex-direction: column;
            transition: transform .25s, box-shadow .25s;
        }
        .compare-panel-old {
            background: var(--bg);
            border: 1px solid var(--border);
        }
        .compare-panel-old:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .compare-panel-mop {
            background: var(--surface);
            border: 1px solid var(--brand);
            box-shadow: var(--shadow-md);
        }
        .compare-panel-mop:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .compare-panel-tag {
            display: inline-flex;
            align-items: center;
            background: #E9EDF2;
            color: var(--text-secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            align-self: flex-start;
            margin-bottom: 18px;
        }
        .compare-panel-mop .compare-panel-tag {
            background: var(--brand-soft);
            color: var(--brand);
        }
        .compare-panel-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
        }
        .compare-list {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 20px;
        }
        .compare-list-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
        }
        .compare-list-item .icon {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            flex-shrink: 0;
            margin-top: 4px;
        }
        .compare-panel-old .compare-list-item .icon {
            background: #E7ECF1;
            color: var(--text-tertiary);
        }
        .compare-panel-mop .compare-list-item .icon {
            background: var(--brand-soft);
            color: var(--brand);
        }
        .compare-panel-note {
            font-size: 13px;
            color: var(--text-tertiary);
            border-top: 1px dashed var(--border);
            padding-top: 14px;
        }
        .compare-cta {
            display: flex;
            justify-content: center;
            margin-top: 36px;
        }

        /* ===== FAQ ===== */
        .faq {
            padding: 80px 0;
            background: var(--bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .faq-wrap {
            display: grid;
            grid-template-columns: 4fr 8fr;
            gap: 40px;
        }
        .faq-left {
            position: sticky;
            top: 128px;
            align-self: flex-start;
        }
        .faq-left .section-title {
            margin-bottom: 16px;
        }
        .faq-left-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .faq-left-link {
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .accordion-custom .accordion-item {
            background: var(--surface);
            border: 1px solid var(--border) !important;
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .25s;
        }
        .accordion-custom .accordion-item:last-child {
            margin-bottom: 0;
        }
        .accordion-custom .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }
        .accordion-custom .accordion-header {
            margin: 0;
        }
        .accordion-custom .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--surface);
            padding: 18px 20px;
            border: none;
            outline: none;
            box-shadow: none;
            border-radius: 12px !important;
            transition: color .2s;
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
        }
        .accordion-custom .accordion-button::after {
            content: none;
        }
        .accordion-custom .accordion-button .accordion-chevron {
            margin-left: auto;
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-tertiary);
            transition: transform .3s;
            font-size: 12px;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--brand);
            background: var(--surface);
        }
        .accordion-custom .accordion-button:not(.collapsed) .accordion-chevron {
            transform: rotate(180deg);
            color: var(--brand);
        }
        .accordion-custom .accordion-button:not(.collapsed)::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--brand);
            border-radius: 3px;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
            background: var(--brand-soft);
        }
        .accordion-custom .accordion-body {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            padding: 4px 20px 20px;
            border-top: 1px solid var(--bg);
            background: var(--surface);
        }

        /* ===== CTA 横幅 ===== */
        .cta-banner {
            padding: 72px 0;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 30, 51, .78);
        }
        .cta-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-banner-title {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-banner-text {
            font-size: 15px;
            color: rgba(255, 255, 255, .8);
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .cta-banner .btn {
            background: #fff;
            color: var(--brand-dark);
            border-color: #fff;
            font-weight: 700;
        }
        .cta-banner .btn:hover {
            background: var(--brand-soft);
            color: var(--brand-dark);
            border-color: var(--brand-soft);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, .2);
        }

        /* ===== 转化表单 ===== */
        .contact-section {
            padding: 80px 0;
        }
        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .contact-form-wrap {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            padding: 36px 32px;
            border: 1px solid var(--border);
        }
        .contact-form-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .contact-form-subtitle {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.6;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-label-custom {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-control-custom {
            width: 100%;
            height: 46px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 0 14px;
            background: var(--bg);
            font-size: 14px;
            color: var(--text-primary);
            outline: none;
            transition: all .2s;
            font-family: inherit;
        }
        .form-control-custom::placeholder {
            color: var(--text-tertiary);
        }
        .form-control-custom:focus {
            border-color: var(--brand);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(45, 127, 249, .15);
        }
        textarea.form-control-custom {
            height: auto;
            padding: 12px 14px;
            resize: vertical;
            min-height: 100px;
            font-family: inherit;
        }
        select.form-control-custom {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235B6C82' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        .submit-btn {
            width: 100%;
            height: 48px;
            font-size: 16px;
            font-weight: 600;
        }
        .privacy-note {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-top: 14px;
            text-align: center;
            line-height: 1.6;
        }
        .contact-info-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            padding: 36px 32px;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .contact-info-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 18px;
        }
        .contact-info-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--brand-soft);
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            flex-shrink: 0;
        }
        .contact-info-field {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 2px;
        }
        .contact-info-value {
            font-size: 15px;
            color: var(--text-primary);
            font-weight: 500;
        }
        .contact-info-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand);
            padding-top: 20px;
            border-top: 1px solid var(--border);
            transition: gap .2s;
        }
        .contact-info-link:hover {
            gap: 10px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F1E33;
            color: #A8B8CC;
            padding: 52px 0 0;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-logo .logo-text {
            color: #fff;
        }
        .footer-logo .logo-icon {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            margin: 18px 0 20px;
            color: #A8B8CC;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #A8B8CC;
            font-size: 14px;
            transition: all .2s;
        }
        .footer-social a:hover {
            border-color: #fff;
            color: #fff;
            background: rgba(255, 255, 255, .08);
            text-decoration: none;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #A8B8CC;
            font-size: 14px;
            transition: color .2s, padding-left .2s;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
            text-decoration: none;
        }
        .footer-contact-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #A8B8CC;
            font-size: 14px;
            line-height: 1.5;
        }
        .footer-contact-item i {
            color: var(--brand);
            margin-top: 3px;
            font-size: 14px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: #7A8CA4;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: #7A8CA4;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199px) {
            .hero .container {
                gap: 40px;
            }
            .hero-title {
                font-size: 38px;
            }
            .metric-item {
                padding: 24px 20px;
            }
            .service-grid {
                gap: 20px;
            }
            .footer-grid {
                gap: 32px;
            }
        }
        @media (max-width: 991px) {
            .hero .container {
                flex-direction: column;
                gap: 32px;
                padding-top: 48px;
            }
            .hero-left {
                max-width: 100%;
                text-align: center;
                padding-bottom: 0;
            }
            .hero-actions,
            .trust-bar {
                justify-content: center;
            }
            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-right {
                padding-bottom: 40px;
                max-width: 640px;
                width: 100%;
            }
            .hero-float-card {
                left: auto;
                right: 16px;
                bottom: 8px;
            }
            .metrics-card {
                grid-template-columns: repeat(2, 1fr);
            }
            .metric-item:nth-child(2) {
                border-right: none;
            }
            .metric-item:nth-child(1),
            .metric-item:nth-child(2) {
                border-bottom: 1px solid var(--border);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .faq-left {
                position: static;
            }
            .contact-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .footer-col-logo {
                grid-column: 1 / -1;
            }
            .section {
                padding: 56px 0;
            }
        }
        @media (max-width: 767px) {
            .brand-row {
                min-height: 58px;
            }
            .header-actions .btn-main {
                padding: 8px 12px;
                font-size: 13px;
            }
            .header-actions .btn-outline-main {
                padding: 8px 14px;
                font-size: 13px;
                display: none;
            }
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .hero {
                padding: 48px 0 0;
            }
            .hero-title {
                font-size: 30px;
                line-height: 1.3;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-image-wrap img {
                height: 320px;
            }
            .hero-float-num {
                font-size: 22px;
            }
            .hero-float-card {
                padding: 14px 16px;
                right: 8px;
                bottom: 8px;
            }
            .metrics-card {
                grid-template-columns: repeat(2, 1fr);
            }
            .metric-item {
                padding: 20px 16px;
            }
            .metric-num {
                font-size: 28px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 26px;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .compare-panel {
                padding: 24px 20px;
            }
            .cta-banner {
                padding: 56px 0;
            }
            .cta-banner-title {
                font-size: 24px;
            }
            .contact-form-wrap,
            .contact-info-card {
                padding: 24px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 24px;
            }
            .footer-col-logo {
                grid-column: auto;
            }
            .footer-bottom .container {
                justify-content: center;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .brand-row .header-search {
                display: none;
            }
            .hero-actions .btn {
                flex: 1;
                justify-content: center;
            }
            .trust-bar {
                gap: 8px;
                font-size: 12px;
            }
            .metric-desc {
                font-size: 11px;
            }
            .metric-name {
                font-size: 13px;
            }
            .news-item-title {
                font-size: 15px;
            }
        }

/* roulang page: category1 */
:root {
  --bg: #F5F8FC;
  --surface: #FFFFFF;
  --brand: #2D7FF9;
  --brand-dark: #1D5FD0;
  --brand-soft: #EAF2FE;
  --accent: #F5A623;
  --accent-soft: #FEF5E6;
  --text-primary: #1E293B;
  --text-secondary: #5B6C82;
  --text-tertiary: #94A3B8;
  --border: #E3EAF2;
  --shadow-sm: 0 1px 2px rgba(30, 41, 59, .04);
  --shadow-md: 0 4px 20px rgba(30, 41, 59, .08);
  --shadow-lg: 0 12px 32px rgba(30, 41, 59, .12);
  --radius: 16px;
  --radius-btn: 10px;
}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text-primary);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;vertical-align:middle}
a{color:var(--brand);text-decoration:none;transition:color .2s}
a:hover{color:var(--brand-dark)}
.container{max-width:1280px;width:100%;padding-right:24px;padding-left:24px;margin-right:auto;margin-left:auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font-size:15px;font-weight:600;line-height:1;padding:12px 24px;
  border-radius:var(--radius-btn);border:1.5px solid transparent;
  transition:all .25s ease;cursor:pointer;white-space:nowrap;outline:none;
}
.btn-main{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-main:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:0 6px 18px rgba(45,127,249,.28)}
.btn-main:active{transform:translateY(0);box-shadow:none}
.btn-main:focus-visible{box-shadow:0 0 0 3px rgba(45,127,249,.25)}
.btn-outline-main{background:var(--surface);color:var(--brand);border-color:var(--brand)}
.btn-outline-main:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand-dark)}
.btn-outline-main:active{transform:translateY(0);background:var(--brand-soft)}
.btn-outline-main:focus-visible{box-shadow:0 0 0 3px rgba(45,127,249,.18)}
.btn-md{padding:10px 20px;font-size:14px}
.btn-lg{padding:14px 32px;font-size:16px}
.section{padding:80px 0}
.section-header{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:40px}
.section-title{font-size:34px;font-weight:700;line-height:1.3;color:var(--text-primary);margin:0}
.section-desc{font-size:15px;color:var(--text-secondary);max-width:520px;line-height:1.7;margin-top:8px}
.section-more{color:var(--brand);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
.section-more:hover{color:var(--brand-dark)}
.section-more i{font-size:12px}
.site-header{position:sticky;top:0;z-index:1050;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-sm);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:var(--shadow-md)}
.brand-row{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.site-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-icon{width:38px;height:38px;border-radius:12px;background:var(--brand-soft);color:var(--brand);font-size:18px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-text{font-size:22px;font-weight:800;color:var(--text-primary);letter-spacing:.5px;white-space:nowrap}
.header-search{position:relative;flex:0 1 360px;margin-left:auto;margin-right:auto}
.header-search i{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-tertiary);font-size:14px;pointer-events:none}
.header-search input{width:100%;height:40px;border:1px solid var(--border);border-radius:999px;padding:0 16px 0 40px;background:var(--bg);font-size:14px;color:var(--text-primary);outline:none;transition:all .2s}
.header-search input::placeholder{color:var(--text-tertiary)}
.header-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(45,127,249,.12);background:var(--surface)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.navbar-toggler{border:1px solid var(--border);background:var(--surface);border-radius:10px;width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-primary);font-size:18px;cursor:pointer;transition:all .2s}
.navbar-toggler:hover{border-color:var(--brand);color:var(--brand)}
.channel-row{border-top:1px solid var(--border);min-height:48px}
.channel-list{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:4px;height:48px;overflow-x:auto}
.channel-list li{flex-shrink:0}
.channel-list a{display:inline-block;padding:8px 16px;border-radius:999px;font-size:14px;font-weight:500;color:var(--text-secondary);transition:all .2s}
.channel-list a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.channel-list a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.mobile-channel{background:var(--surface);border-top:1px solid var(--border);padding:16px 0 20px}
.mobile-search{margin-bottom:12px}
.mobile-search input{width:100%;height:40px;border:1px solid var(--border);border-radius:999px;padding:0 16px 0 40px;background:var(--bg);font-size:14px;outline:none}
.mobile-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(45,127,249,.12)}
.mobile-channel-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.mobile-channel-list a{display:block;padding:12px 16px;border-radius:10px;color:var(--text-primary);font-size:15px;font-weight:500}
.mobile-channel-list a:hover{background:var(--brand-soft);color:var(--brand)}
.mobile-channel-list a.active{background:var(--brand-soft);color:var(--brand);font-weight:600}
.site-footer{background:#0F1E33;color:rgba(255,255,255,.75);padding-top:48px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr;gap:48px;padding-bottom:40px}
.footer-logo .logo-text{color:#fff}
.footer-desc{font-size:14px;color:rgba(255,255,255,.6);margin-top:14px;line-height:1.8;max-width:360px}
.footer-social{display:flex;gap:12px;margin-top:16px}
.footer-social a{width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.2);display:inline-flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);font-size:14px;transition:all .2s}
.footer-social a:hover{border-color:var(--brand);color:var(--brand);background:rgba(255,255,255,.06)}
.footer-title{font-size:16px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:rgba(255,255,255,.65);font-size:14px;transition:color .2s}
.footer-links a:hover{color:var(--brand)}
.footer-contact-list{display:flex;flex-direction:column;gap:12px}
.footer-contact-item{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.65)}
.footer-contact-item i{color:var(--brand);font-size:14px;width:20px;text-align:center}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:16px 0;font-size:12px;color:rgba(255,255,255,.45)}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--brand)}
/* ===== 分类页特有 ===== */
.category-hero{
  position:relative;
  background-size:cover;
  background-position:center;
  padding:72px 0 64px;
  color:#fff;
}
.category-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(10,25,47,.92) 0%,rgba(10,25,47,.75) 48%,rgba(10,25,47,.55) 100%);
}
.category-hero .container{position:relative;z-index:2}
.breadcrumb-wrap{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:20px}
.breadcrumb-wrap a{color:rgba(255,255,255,.7)}
.breadcrumb-wrap a:hover{color:#fff}
.breadcrumb-sep{opacity:.5}
.category-hero h1{font-size:40px;font-weight:800;line-height:1.3;margin:0 0 16px;color:#fff;letter-spacing:.5px}
.category-hero-desc{font-size:16px;line-height:1.8;color:rgba(255,255,255,.85);max-width:680px;margin-bottom:32px}
.category-stats{display:flex;gap:16px;flex-wrap:wrap}
.cat-stat{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(6px);
  border-radius:14px;
  padding:14px 22px;
  display:flex;
  flex-direction:column;
  min-width:130px;
}
.cat-stat strong{font-size:28px;font-weight:800;color:#fff;line-height:1.2}
.cat-stat span{font-size:13px;color:rgba(255,255,255,.75);margin-top:4px}
.filter-section{padding:32px 0 8px;position:relative;z-index:3}
.filter-bar{
  background:var(--surface);
  border-radius:999px;
  box-shadow:var(--shadow-sm);
  padding:8px;
  display:flex;
  gap:6px;
  flex-wrap:wrap;
  border:1px solid var(--border);
}
.filter-tab{
  padding:8px 20px;
  border-radius:999px;
  font-size:14px;
  font-weight:500;
  color:var(--text-secondary);
  background:transparent;
  border:none;
  cursor:pointer;
  transition:all .2s;
  display:inline-flex;align-items:center;gap:6px;
}
.filter-tab:hover{background:var(--brand-soft);color:var(--brand)}
.filter-tab.active{background:var(--brand);color:#fff;font-weight:600;box-shadow:0 2px 8px rgba(45,127,249,.25)}
.video-grid-section{padding:48px 0 72px}
.video-card{
  background:var(--surface);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  height:100%;
  display:flex;
  flex-direction:column;
  transition:all .3s ease;
  border:1px solid transparent;
}
.video-card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-4px);
  border-color:var(--brand-soft);
}
.video-card-img{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--brand-soft)}
.video-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.video-card:hover .video-card-img img{transform:scale(1.05)}
.video-card-img .img-badge{
  position:absolute;top:12px;left:12px;
  background:rgba(15,30,51,.82);
  color:#fff;
  font-size:12px;
  font-weight:500;
  padding:4px 12px;
  border-radius:999px;
  backdrop-filter:blur(4px);
}
.video-card-img .duration-badge{
  position:absolute;bottom:10px;right:12px;
  background:rgba(15,30,51,.75);
  color:#fff;
  font-size:12px;
  padding:2px 10px;
  border-radius:6px;
  backdrop-filter:blur(4px);
}
.video-card-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1}
.video-card-body h3{font-size:17px;font-weight:700;color:var(--text-primary);line-height:1.5;margin:0 0 8px}
.video-card-body h3 a{color:inherit}
.video-card-body h3 a:hover{color:var(--brand)}
.video-card-desc{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-tertiary);margin-bottom:14px;flex-wrap:wrap}
.video-card-meta .tag{display:inline-flex;align-items:center;gap:4px;background:var(--brand-soft);color:var(--brand);padding:2px 10px;border-radius:999px;font-weight:500}
.video-card-meta .tag.accent{background:var(--accent-soft);color:var(--accent)}
.video-card-link{
  margin-top:auto;
  font-size:14px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:4px;
  transition:gap .2s;
}
.video-card-link:hover{color:var(--brand-dark);gap:8px}
.feature-section{background:var(--surface);padding:72px 0;border-top:1px solid var(--border)}
.feature-card{
  background:var(--bg);
  border-radius:var(--radius);
  padding:28px 24px;
  height:100%;
  transition:all .3s;
  border:1px solid transparent;
}
.feature-card:hover{border-color:var(--brand-soft);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.feature-icon{
  width:48px;height:48px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:16px;
}
.feature-card:nth-child(2) .feature-icon{background:var(--accent-soft);color:var(--accent)}
.feature-card h3{font-size:18px;font-weight:700;margin:0 0 8px;color:var(--text-primary)}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.7;margin:0}
.feature-card .num-badge{
  position:absolute;top:16px;right:16px;
  font-size:12px;font-weight:700;
  background:var(--brand);color:#fff;
  padding:2px 10px;border-radius:8px;
}
.scenario-section{padding:72px 0}
.scenario-card{
  background:var(--surface);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow-sm);
  height:100%;
  transition:all .3s;
  border-left:3px solid var(--brand);
}
.scenario-card:hover{box-shadow:var(--shadow-md);transform:translateX(4px)}
.scenario-card:nth-child(2){border-left-color:var(--accent)}
.scenario-card h3{font-size:18px;font-weight:700;color:var(--text-primary);margin:0 0 10px}
.scenario-card p{font-size:14px;color:var(--text-secondary);line-height:1.8;margin:0}
.category-faq-section{padding:72px 0;background:var(--surface);border-top:1px solid var(--border)}
.custom-faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
}
.custom-faq-item .accordion-button{
  background:var(--surface);
  color:var(--text-primary);
  font-size:16px;
  font-weight:600;
  padding:18px 20px;
  box-shadow:none;
  border:none;
  position:relative;
  transition:color .2s;
}
.custom-faq-item .accordion-button:not(.collapsed){
  color:var(--brand);
  box-shadow:none;
  border-left:3px solid var(--brand);
  background:var(--brand-soft);
}
.custom-faq-item .accordion-button:focus-visible{
  box-shadow:0 0 0 3px rgba(45,127,249,.18);
}
.custom-faq-item .accordion-button::after{
  background-image:none;
  font-family:"bootstrap-icons" !important;
  content:"\f282";
  font-size:16px;
  color:var(--text-tertiary);
  transition:transform .3s;
}
.custom-faq-item .accordion-button:not(.collapsed)::after{
  content:"\f286";
  color:var(--brand);
  transform:none;
}
.custom-faq-item .accordion-body{padding:16px 20px 20px;font-size:14px;color:var(--text-secondary);line-height:1.8;border-top:1px solid var(--border)}
.category-cta{
  position:relative;
  background-size:cover;
  background-position:center;
  padding:80px 0;
  color:#fff;
  text-align:center;
}
.category-cta::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(15,30,51,.94) 0%,rgba(29,95,208,.82) 100%);
}
.category-cta .container{position:relative;z-index:2}
.category-cta h2{font-size:30px;font-weight:800;color:#fff;margin:0 0 12px}
.category-cta p{font-size:16px;color:rgba(255,255,255,.85);max-width:560px;margin:0 auto 28px;line-height:1.7}
.category-cta .btn-main{
  background:#fff;color:var(--brand-dark);border-color:#fff;
}
.category-cta .btn-main:hover{background:var(--brand-soft);border-color:var(--brand-soft)}
.recommend-section{padding:72px 0}
.recommend-card{
  background:var(--surface);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  height:100%;
  transition:all .3s;
}
.recommend-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.recommend-card .rec-img{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--brand-soft)}
.recommend-card .rec-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.recommend-card:hover .rec-img img{transform:scale(1.04)}
.recommend-card .rec-body{padding:18px 20px 20px}
.recommend-card h3{font-size:16px;font-weight:700;color:var(--text-primary);line-height:1.5;margin:0 0 6px}
.recommend-card h3 a{color:inherit}
.recommend-card h3 a:hover{color:var(--brand)}
.recommend-card p{font-size:13px;color:var(--text-tertiary);margin:0}
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:991.98px){
  .section{padding:56px 0}
  .brand-row{min-height:60px}
  .channel-row{border-top:none}
  .category-hero{padding:56px 0 48px}
  .category-hero h1{font-size:32px}
  .cat-stat{min-width:110px;padding:12px 16px}
  .cat-stat strong{font-size:22px}
  .filter-bar{border-radius:20px;padding:12px}
  .video-grid-section{padding:36px 0 56px}
  .footer-grid{gap:28px}
}
@media (max-width:767.98px){
  .section{padding:48px 0}
  .container{padding-right:16px;padding-left:16px}
  .section-title{font-size:26px}
  .brand-row{flex-wrap:wrap;gap:12px;padding:8px 0}
  .header-actions{margin-left:auto}
  .category-hero{padding:40px 0 36px}
  .category-hero h1{font-size:28px}
  .category-hero-desc{font-size:15px}
  .category-stats{gap:10px}
  .cat-stat{flex:1;min-width:calc(50% - 10px)}
  .filter-section{padding:20px 0 4px}
  .filter-bar{overflow-x:auto;flex-wrap:nowrap;justify-content:flex-start}
  .filter-tab{padding:7px 16px;font-size:13px;white-space:nowrap;flex-shrink:0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .category-cta{padding:56px 0}
  .category-cta h2{font-size:24px}
  .video-card-body{padding:16px}
  .footer-bottom .container{flex-direction:column;text-align:center;gap:6px}
}

/* 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}