/* roulang page: index */
:root {
            --night-950: #0B0D10;
            --night-900: #12151A;
            --night-850: #181C23;
            --night-800: #1E242D;
            --accent: #2CE0B5;
            --accent-strong: #1FC99C;
            --accent-2: #FF6A4D;
            --text-primary: #F4F7FA;
            --text-secondary: #C9D0DA;
            --muted: #8E98A8;
            --line: rgba(255,255,255,0.08);
            --card-bg: #14181E;
            --surface: #0F1216;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 18px rgba(0,0,0,0.25);
            --shadow-card-hover: 0 12px 34px rgba(0,0,0,0.45);
            --transition-base: all .25s ease;
            --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--night-950);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--accent-strong);
            text-decoration: underline;
        }

        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            max-width: 1200px;
        }

        @media (min-width: 1200px) {
            .container {
                max-width: 1200px;
            }
        }

        /* ====== 按钮重塑 ====== */
        .btn {
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.7rem 1.6rem;
            transition: var(--transition-base);
            border: none;
            letter-spacing: 0.02em;
        }

        .btn-primary {
            background-color: var(--accent);
            color: var(--night-950);
            border: 2px solid var(--accent);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--accent-strong);
            border-color: var(--accent-strong);
            color: var(--night-950);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(44,224,181,0.3);
        }

        .btn-outline-accent {
            background-color: transparent;
            color: var(--text-primary);
            border: 2px solid var(--line);
        }

        .btn-outline-accent:hover,
        .btn-outline-accent:focus {
            background-color: rgba(255,255,255,0.05);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .btn-accent-2 {
            background-color: var(--accent-2);
            color: #fff;
            border: 2px solid var(--accent-2);
        }

        .btn-accent-2:hover,
        .btn-accent-2:focus {
            background-color: #ff7a5f;
            border-color: #ff7a5f;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255,106,77,0.3);
        }

        .btn-lg {
            padding: 0.85rem 2rem;
            font-size: 1rem;
        }

        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
        }

        /* ====== 卡片重塑 ====== */
        .card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-img) var(--radius-img) 0 0;
            background-color: var(--night-800);
        }

        /* ====== 导航样式 ====== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background-color: rgba(11,13,16,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
        }

        .nav-row-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 0.8rem 0;
            flex-wrap: wrap;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .brand:hover {
            color: var(--text-primary);
            text-decoration: none;
        }

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-strong));
            color: var(--night-950);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .brand-badge {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-pill);
            margin-left: 0.3rem;
            white-space: nowrap;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1;
            max-width: 380px;
            min-width: 200px;
        }

        .nav-search .form-control {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }

        .nav-search .form-control::placeholder {
            color: var(--muted);
        }

        .nav-search .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: var(--night-850);
            color: var(--text-primary);
            outline: none;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            white-space: nowrap;
        }

        .nav-row-channels {
            padding: 0.5rem 0;
            border-top: 1px solid var(--line);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--line) transparent;
        }

        .nav-row-channels::-webkit-scrollbar {
            height: 4px;
        }

        .nav-row-channels::-webkit-scrollbar-track {
            background: transparent;
        }

        .nav-row-channels::-webkit-scrollbar-thumb {
            background: var(--line);
            border-radius: 999px;
        }

        .channel-tabs {
            display: flex;
            gap: 0.4rem;
            flex-wrap: nowrap;
            white-space: nowrap;
            min-width: max-content;
        }

        .channel-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.45rem 1.1rem;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background-color: transparent;
            border: 1px solid transparent;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .channel-tab:hover {
            color: var(--text-primary);
            background-color: rgba(255,255,255,0.06);
            text-decoration: none;
        }

        .channel-tab.active {
            background-color: rgba(44,224,181,0.15);
            border-color: var(--accent);
            color: var(--accent);
            font-weight: 600;
        }

        /* ====== 面包屑 ====== */
        .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: 0.85rem;
        }

        .breadcrumb-item a {
            color: var(--muted);
        }

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

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

        .breadcrumb-item + .breadcrumb-item::before {
            color: var(--muted);
            content: "/";
        }

        /* ====== Hero ====== */
        .hero {
            position: relative;
            background-image: url('/assets/images/bff30003e4e56ab9.webp');
            background-size: cover;
            background-position: center;
            min-height: 560px;
            display: flex;
            align-items: center;
            padding: 5rem 0 4rem;
            scroll-margin-top: 150px;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,13,16,0.75) 0%, rgba(11,13,16,0.88) 60%, rgba(11,13,16,0.96) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-countdown {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255,106,77,0.15);
            border: 1px solid rgba(255,106,77,0.4);
            color: var(--accent-2);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.45rem 1.2rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.2rem;
        }

        .hero-countdown i {
            font-size: 1rem;
        }

        .hero-title {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .hero-subtitle {
            font-size: clamp(1rem, 1.8vw, 1.15rem);
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 1.5rem;
            line-height: 1.8;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.8rem;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(255,255,255,0.08);
            border: 1px solid var(--line);
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .hero-tag:hover {
            border-color: var(--accent);
            color: var(--text-primary);
            background: rgba(44,224,181,0.1);
            text-decoration: none;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
        }

        .hero-search {
            display: flex;
            gap: 0.5rem;
            max-width: 520px;
            margin-top: 1.5rem;
        }

        .hero-search .form-control {
            background-color: rgba(255,255,255,0.06);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.75rem 1.4rem;
            font-size: 0.95rem;
            flex: 1;
            transition: var(--transition-base);
        }

        .hero-search .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: rgba(255,255,255,0.08);
            outline: none;
            color: var(--text-primary);
        }

        .hero-search .form-control::placeholder {
            color: var(--muted);
        }

        /* ====== 板块通用 ====== */
        .section {
            padding: 4.5rem 0;
            scroll-margin-top: 140px;
        }

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

        .section-head {
            margin-bottom: 2.5rem;
        }

        .section-head h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.6rem;
            line-height: 1.35;
        }

        .section-head p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 0;
            line-height: 1.75;
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }

        /* ====== 数据看板 ====== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }

        .stat-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.2rem;
            text-align: center;
            transition: var(--transition-base);
        }

        .stat-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 0.4rem;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ====== 服务矩阵 ====== */
        .service-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 1rem;
        }

        .service-card-lg {
            grid-row: span 2;
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 280px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-card-lg:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .service-card-lg .service-cover {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }

        .service-card-lg .service-content {
            position: relative;
            z-index: 1;
        }

        .service-card-sm {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.4rem;
            transition: var(--transition-base);
        }

        .service-card-sm:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .service-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(44,224,181,0.12);
            color: var(--accent);
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
        }

        .service-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .service-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ====== 专题/场景入口 ====== */
        .topic-scroll {
            display: flex;
            gap: 1rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--line) transparent;
            padding-bottom: 0.5rem;
        }

        .topic-scroll::-webkit-scrollbar {
            height: 5px;
        }

        .topic-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .topic-scroll::-webkit-scrollbar-thumb {
            background: var(--line);
            border-radius: 999px;
        }

        .topic-card {
            flex: 0 0 300px;
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .topic-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .topic-card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            background-color: var(--night-800);
        }

        .topic-card-body {
            padding: 1.2rem;
        }

        .topic-card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }

        .topic-card-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 0.8rem;
            line-height: 1.6;
        }

        .topic-card-badge {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-pill);
            display: inline-block;
        }

        /* ====== 结果对比 ====== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .compare-card {
            border-radius: var(--radius-card);
            padding: 2rem;
            border: 1px solid var(--line);
            transition: var(--transition-base);
        }

        .compare-card-pain {
            background-color: rgba(255,106,77,0.06);
            border-color: rgba(255,106,77,0.3);
        }

        .compare-card-gain {
            background-color: rgba(44,224,181,0.06);
            border-color: rgba(44,224,181,0.35);
        }

        .compare-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .compare-card-pain h3 {
            color: var(--accent-2);
        }

        .compare-card-gain h3 {
            color: var(--accent);
        }

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

        .compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0.7rem;
            line-height: 1.6;
        }

        .compare-list li i {
            margin-top: 0.3rem;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .compare-card-pain .compare-list li i {
            color: var(--accent-2);
        }

        .compare-card-gain .compare-list li i {
            color: var(--accent);
        }

        /* ====== 热播榜单 ====== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 0.8rem 1.2rem;
            transition: var(--transition-base);
        }

        .rank-item:hover {
            border-color: var(--accent);
            transform: translateX(4px);
        }

        .rank-number {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--muted);
            width: 40px;
            text-align: center;
            flex-shrink: 0;
        }

        .rank-item:nth-child(1) .rank-number {
            color: var(--accent-2);
        }

        .rank-item:nth-child(2) .rank-number {
            color: var(--accent);
        }

        .rank-item:nth-child(3) .rank-number {
            color: var(--accent-strong);
        }

        .rank-cover {
            width: 60px;
            height: 44px;
            object-fit: cover;
            border-radius: 8px;
            background-color: var(--night-800);
            flex-shrink: 0;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 0.15rem;
        }

        .rank-desc {
            font-size: 0.8rem;
            color: var(--muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .rank-badge {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            padding: 0.25rem 0.7rem;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* ====== 里程碑 ====== */
        .timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1rem;
            position: relative;
        }

        .timeline::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--line);
            z-index: 0;
        }

        .timeline-node {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .timeline-dot {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--night-900);
            border: 2px solid var(--accent);
            color: var(--accent);
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
            transition: var(--transition-base);
        }

        .timeline-node:hover .timeline-dot {
            background-color: var(--accent);
            color: var(--night-950);
            transform: scale(1.08);
        }

        .timeline-year {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }

        .timeline-desc {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 0;
        }

        /* ====== 资讯动态 ====== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }

        .news-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.4rem;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .news-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .news-card a {
            display: block;
            text-decoration: none;
        }

        .news-card a:hover {
            text-decoration: none;
        }

        .news-card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 0.4rem;
            transition: var(--transition-base);
        }

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

        .news-card-excerpt {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.4rem;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.78rem;
            color: var(--muted);
        }

        .badge-cat {
            background: rgba(44,224,181,0.12);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.72rem;
            padding: 0.25rem 0.7rem;
            border-radius: var(--radius-pill);
            border: none;
        }

        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--muted);
            background: var(--card-bg);
            border: 1px dashed var(--line);
            border-radius: var(--radius-card);
            font-size: 0.95rem;
        }

        .empty-state i {
            font-size: 2rem;
            display: block;
            margin-bottom: 0.8rem;
            color: var(--muted);
        }

        /* ====== 平台保障 ====== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }

        .guarantee-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.4rem;
            text-align: center;
            transition: var(--transition-base);
        }

        .guarantee-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .guarantee-icon {
            font-size: 1.8rem;
            color: var(--accent);
            margin-bottom: 0.7rem;
            display: block;
        }

        .guarantee-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }

        .guarantee-desc {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ====== 快速解答 ====== */
        .quick-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .quick-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.3rem;
            transition: var(--transition-base);
        }

        .quick-card:hover {
            border-color: var(--accent);
        }

        .quick-q {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .quick-a {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ====== 观看指南 ====== */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }

        .guide-step {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            text-align: center;
            position: relative;
            transition: var(--transition-base);
        }

        .guide-step:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }

        .guide-step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(44,224,181,0.15);
            color: var(--accent);
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
        }

        .guide-step-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.4rem;
        }

        .guide-step-desc {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ====== FAQ ====== */
        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--line);
            --bs-accordion-border-radius: var(--radius-card);
            --bs-accordion-inner-border-radius: var(--radius-card);
            --bs-accordion-btn-bg: var(--card-bg);
            --bs-accordion-btn-color: var(--text-primary);
            --bs-accordion-active-bg: rgba(44,224,181,0.06);
            --bs-accordion-active-color: var(--accent);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .accordion-item {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card) !important;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .accordion-item:hover {
            border-color: rgba(44,224,181,0.3);
        }

        .accordion-button {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 1.1rem 1.4rem;
            background-color: transparent;
            color: var(--text-primary);
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
        }

        .accordion-button:not(.collapsed) {
            background-color: rgba(44,224,181,0.06);
            color: var(--accent);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        .accordion-button::after {
            filter: invert(0.7);
        }

        .accordion-body {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
            padding: 0 1.4rem 1.2rem;
            background-color: transparent;
        }

        /* ====== 转化表单 ====== */
        .cta-section {
            padding: 4.5rem 0;
            scroll-margin-top: 140px;
        }

        .cta-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: calc(var(--radius-card) + 4px);
            padding: 3rem 2rem;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }

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

        .cta-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }

        .cta-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 1.8rem;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 0.6rem;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form .form-control {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.75rem 1.4rem;
            font-size: 0.9rem;
            flex: 1;
            min-width: 220px;
            transition: var(--transition-base);
        }

        .cta-form .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: var(--night-850);
            outline: none;
            color: var(--text-primary);
        }

        .cta-form .form-control::placeholder {
            color: var(--muted);
        }

        .form-select {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.7rem 1.2rem;
        }

        .form-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
        }

        /* ====== 页脚 ====== */
        .site-footer {
            background-color: var(--night-900);
            border-top: 1px solid var(--line);
            padding: 3rem 0 1.5rem;
        }

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

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
            display: block;
        }

        .footer-brand:hover {
            color: var(--text-primary);
            text-decoration: none;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.9rem;
        }

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

        .footer-links li {
            margin-bottom: 0.5rem;
        }

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

        .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.8rem;
            color: var(--muted);
        }

        /* ====== 图片遮罩 ====== */
        .img-mask {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-img);
        }

        .img-mask img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }

        .img-mask:hover img {
            transform: scale(1.04);
        }

        /* ====== 响应式 ====== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        @media (max-width: 1024px) {
            .hero {
                min-height: 480px;
                padding: 4rem 0 3rem;
            }

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

            .service-grid {
                grid-template-columns: 1fr 1fr;
            }

            .service-card-lg {
                grid-row: auto;
                min-height: 220px;
            }

            .timeline {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.5rem 1rem;
            }

            .timeline::before {
                display: none;
            }

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

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

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

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

        @media (max-width: 768px) {
            .nav-row-top {
                flex-direction: column;
                align-items: stretch;
                gap: 0.6rem;
                padding: 0.7rem 0;
            }

            .brand {
                font-size: 1.1rem;
            }

            .nav-search {
                max-width: 100%;
                order: 3;
            }

            .nav-cta {
                order: 2;
                justify-content: flex-start;
            }

            .hero {
                min-height: auto;
                padding: 3rem 0 2.5rem;
                text-align: left;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-search {
                flex-direction: column;
            }

            .compare-grid {
                grid-template-columns: 1fr;
            }

            .quick-grid {
                grid-template-columns: 1fr;
            }

            .news-grid {
                grid-template-columns: 1fr;
            }

            .section {
                padding: 3rem 0;
            }

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

            .stat-number {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.7rem;
            }

            .stat-card {
                padding: 1rem 0.8rem;
            }

            .stat-number {
                font-size: 1.3rem;
            }

            .service-grid {
                grid-template-columns: 1fr;
            }

            .timeline {
                grid-template-columns: 1fr;
            }

            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.7rem;
            }

            .guide-steps {
                grid-template-columns: 1fr;
            }

            .guarantee-card {
                padding: 1rem 0.8rem;
            }

            .cta-card {
                padding: 2rem 1.2rem;
            }

            .cta-title {
                font-size: 1.25rem;
            }

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

            .hero-title {
                font-size: 1.7rem;
            }

            .hero-subtitle {
                font-size: 0.95rem;
            }

            .rank-item {
                padding: 0.6rem 0.8rem;
                gap: 0.6rem;
            }

            .rank-cover {
                width: 45px;
                height: 35px;
            }

            .rank-title {
                font-size: 0.85rem;
            }

            .rank-badge {
                font-size: 0.7rem;
                padding: 0.2rem 0.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --night-950: #0B0D10;
            --night-900: #12151A;
            --night-850: #181C23;
            --night-800: #1E242D;
            --accent: #2CE0B5;
            --accent-strong: #1FC99C;
            --accent-2: #FF6A4D;
            --text-primary: #F4F7FA;
            --text-secondary: #C9D0DA;
            --muted: #8E98A8;
            --line: rgba(255,255,255,0.08);
            --card-bg: #14181E;
            --surface: #0F1216;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 18px rgba(0,0,0,0.25);
            --shadow-card-hover: 0 12px 34px rgba(0,0,0,0.45);
            --transition-base: all .25s ease;
            --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--night-950);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-strong);
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
        }
        section {
            padding: 3.5rem 0;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(44,224,181,0.1);
            padding: 0.3rem 0.9rem;
            border-radius: var(--radius-pill);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 1rem;
        }
        .section-title {
            font-size: clamp(1.5rem, 2.6vw, 2rem);
            font-weight: 800;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }
        /* ====== 按钮重塑 ====== */
        .btn {
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.7rem 1.6rem;
            transition: var(--transition-base);
            border: none;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            background-color: var(--accent);
            color: var(--night-950);
            border: 2px solid var(--accent);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--accent-strong);
            border-color: var(--accent-strong);
            color: var(--night-950);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(44,224,181,0.3);
        }
        .btn-outline-accent {
            background-color: transparent;
            color: var(--text-primary);
            border: 2px solid var(--line);
        }
        .btn-outline-accent:hover,
        .btn-outline-accent:focus {
            background-color: rgba(255,255,255,0.05);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-accent-2 {
            background-color: var(--accent-2);
            color: #fff;
            border: 2px solid var(--accent-2);
        }
        .btn-accent-2:hover,
        .btn-accent-2:focus {
            background-color: #ff7a5f;
            border-color: #ff7a5f;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255,106,77,0.3);
        }
        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
        }
        /* ====== 卡片重塑 ====== */
        .card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-img) var(--radius-img) 0 0;
            background-color: var(--night-800);
        }
        /* ====== 导航样式 ====== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background-color: rgba(11,13,16,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
        }
        .nav-row-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 0.8rem 0;
            flex-wrap: wrap;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--text-primary);
            text-decoration: none;
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-strong));
            color: var(--night-950);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .brand-badge {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-pill);
            margin-left: 0.3rem;
            white-space: nowrap;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1;
            max-width: 380px;
            min-width: 200px;
        }
        .nav-search .form-control {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.55rem 1.2rem;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .nav-search .form-control::placeholder {
            color: var(--muted);
        }
        .nav-search .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            color: var(--text-primary);
            background-color: var(--surface);
        }
        .nav-cta {
            display: flex;
            align-items: center;
        }
        .nav-row-channels {
            padding: 0.55rem 0 0.7rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--night-800) transparent;
        }
        .nav-row-channels::-webkit-scrollbar {
            height: 4px;
        }
        .nav-row-channels::-webkit-scrollbar-track {
            background: transparent;
        }
        .nav-row-channels::-webkit-scrollbar-thumb {
            background: var(--night-800);
            border-radius: 4px;
        }
        .channel-tabs {
            display: inline-flex;
            gap: 0.5rem;
            min-width: max-content;
        }
        .channel-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.45rem 1.1rem;
            border-radius: var(--radius-pill);
            font-size: 0.87rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .channel-tab:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.05);
            text-decoration: none;
            border-color: var(--line);
        }
        .channel-tab.active {
            color: var(--night-950);
            background: var(--accent);
            border-color: var(--accent);
        }
        .channel-tab.active:hover {
            color: var(--night-950);
            background: var(--accent-strong);
        }
        /* ====== 分类页头部 ====== */
        .category-hero {
            padding: 2.2rem 0 1.8rem;
            background: linear-gradient(180deg, var(--night-900) 0%, var(--night-950) 100%);
            border-bottom: 1px solid var(--line);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.82rem;
            color: var(--muted);
            margin-bottom: 1rem;
            padding: 0;
            background: transparent;
        }
        .breadcrumb a {
            color: var(--muted);
        }
        .breadcrumb a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
        }
        .category-hero h1 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 0.7rem;
        }
        .category-hero .lead {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
            margin-bottom: 1.2rem;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .category-hero .hero-tags .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.35rem 0.9rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
        }
        /* ====== 筛选工具条 ====== */
        .filter-toolbar {
            background-color: var(--night-900);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1rem 1.2rem;
            margin-bottom: 2rem;
        }
        .filter-toolbar .filter-label {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 0.5rem;
        }
        .filter-toolbar .form-select {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.5rem 1rem;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .filter-toolbar .form-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
        }
        .filter-toolbar .filter-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
        }
        .filter-toolbar .filter-pill {
            padding: 0.4rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            transition: var(--transition-base);
            cursor: pointer;
        }
        .filter-toolbar .filter-pill:hover,
        .filter-toolbar .filter-pill.active {
            color: var(--night-950);
            background: var(--accent);
            border-color: var(--accent);
        }
        /* ====== 分类主体卡片 ====== */
        .category-main-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2rem;
            margin-bottom: 2rem;
        }
        .category-main-card h2 {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .category-main-card h2 i {
            color: var(--accent);
        }
        .category-article-card {
            display: flex;
            gap: 1.2rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--line);
            align-items: center;
            transition: var(--transition-base);
        }
        .category-article-card:last-child {
            border-bottom: none;
        }
        .category-article-card:hover {
            background: rgba(255,255,255,0.02);
            border-radius: 8px;
            padding-left: 0.5rem;
            padding-right: 0.5rem;
        }
        .category-article-thumb {
            width: 130px;
            height: 86px;
            border-radius: var(--radius-img);
            overflow: hidden;
            flex-shrink: 0;
            background-color: var(--night-800);
        }
        .category-article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .category-article-body {
            flex: 1;
            min-width: 0;
        }
        .category-article-body .article-meta {
            display: flex;
            gap: 0.8rem;
            font-size: 0.78rem;
            color: var(--muted);
            margin-bottom: 0.3rem;
            flex-wrap: wrap;
        }
        .category-article-body .article-meta .badge-cat {
            background: rgba(44,224,181,0.12);
            color: var(--accent);
            padding: 0.15rem 0.65rem;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.75rem;
        }
        .category-article-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
            line-height: 1.5;
            margin-top: 0;
        }
        .category-article-body h3 a {
            color: var(--text-primary);
        }
        .category-article-body h3 a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .category-article-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        /* ====== 推荐专题卡 ====== */
        .topic-card {
            height: 100%;
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
            background-color: var(--night-900);
            border: 1px solid var(--line);
            transition: var(--transition-base);
            min-height: 220px;
        }
        .topic-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .topic-card-img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            background-color: var(--night-800);
        }
        .topic-card-body {
            padding: 1rem 1.2rem;
        }
        .topic-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }
        .topic-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 0.4rem;
            line-height: 1.6;
        }
        .topic-card-body .topic-link {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent);
        }
        /* ====== 指标小条 ====== */
        .metric-strip {
            background: rgba(44,224,181,0.05);
            border: 1px solid rgba(44,224,181,0.15);
            border-radius: var(--radius-card);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
        }
        .metric-strip .metric-item {
            text-align: center;
        }
        .metric-strip .metric-num {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
            line-height: 1.2;
        }
        .metric-strip .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 0.3rem;
        }
        /* ====== 观看提示 ====== */
        .tips-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.8rem;
            height: 100%;
            transition: var(--transition-base);
        }
        .tips-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .tips-card .tips-icon {
            font-size: 1.3rem;
            color: var(--accent);
            margin-bottom: 0.8rem;
        }
        .tips-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .tips-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
        /* ====== FAQ ====== */
        .accordion {
            --bs-accordion-bg: var(--card-bg);
            --bs-accordion-border-color: var(--line);
            --bs-accordion-border-radius: 12px;
            --bs-accordion-inner-border-radius: 10px;
            --bs-accordion-btn-bg: var(--card-bg);
            --bs-accordion-btn-color: var(--text-primary);
            --bs-accordion-active-bg: var(--night-850);
            --bs-accordion-active-color: var(--accent);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            --bs-accordion-body-color: var(--text-secondary);
            --bs-accordion-btn-icon-color: var(--accent);
            --bs-accordion-btn-active-icon-color: var(--accent);
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .accordion-item {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: 12px;
            overflow: hidden;
        }
        .accordion-button {
            font-weight: 700;
            font-size: 0.95rem;
            padding: 1.1rem 1.5rem;
            border-radius: 12px;
            background-color: var(--card-bg);
            color: var(--text-primary);
        }
        .accordion-button:not(.collapsed) {
            background-color: var(--night-850);
            color: var(--accent);
            border-bottom: 1px solid var(--line);
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            border-color: var(--accent);
        }
        .accordion-body {
            padding: 1.2rem 1.5rem;
            font-size: 0.92rem;
            line-height: 1.8;
        }
        /* ====== CTA ====== */
        .cta-section {
            background: linear-gradient(135deg, var(--night-900) 0%, var(--night-850) 100%);
            border: 1px solid rgba(44,224,181,0.15);
            border-radius: var(--radius-card);
            padding: 2.5rem;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.7rem;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 560px;
            margin: 0 auto 1.5rem;
            line-height: 1.8;
        }
        .cta-section .cta-form {
            display: flex;
            gap: 0.8rem;
            max-width: 420px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-section .form-control {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.65rem 1.4rem;
            font-size: 0.9rem;
            flex: 1;
            min-width: 200px;
        }
        .cta-section .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: var(--surface);
            color: var(--text-primary);
        }
        .cta-section .form-control::placeholder {
            color: var(--muted);
        }
        /* ====== 页脚 ====== */
        .site-footer {
            background-color: var(--night-900);
            border-top: 1px solid var(--line);
            padding: 3rem 0 2rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-primary);
            display: block;
            margin-bottom: 0.6rem;
        }
        .footer-desc {
            font-size: 0.88rem;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            font-size: 0.88rem;
            color: var(--muted);
        }
        .footer-links a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 1.5rem;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--muted);
            margin-bottom: 0;
        }
        /* ====== 响应式 ====== */
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-row-top {
                flex-direction: column;
                align-items: stretch;
                gap: 0.7rem;
                padding: 0.7rem 0;
            }
            .brand {
                justify-content: center;
            }
            .nav-search {
                max-width: 100%;
                min-width: 100%;
            }
            .nav-cta {
                justify-content: center;
            }
            .nav-cta .btn {
                width: 100%;
                max-width: 260px;
            }
            section {
                padding: 2.5rem 0;
            }
            .category-hero {
                padding: 1.5rem 0 1.2rem;
            }
            .category-article-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.8rem;
            }
            .category-article-thumb {
                width: 100%;
                height: 160px;
            }
            .metric-strip {
                padding: 1.2rem 1rem;
            }
            .metric-strip .metric-num {
                font-size: 1.4rem;
            }
            .cta-section {
                padding: 1.8rem 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.4rem;
            }
            .category-hero .lead {
                font-size: 0.9rem;
            }
            .category-main-card {
                padding: 1.2rem;
            }
            .filter-toolbar {
                padding: 0.8rem;
            }
            .filter-toolbar .filter-pill {
                font-size: 0.78rem;
                padding: 0.35rem 0.8rem;
            }
            .topic-card-img {
                height: 120px;
            }
            .topic-card-body {
                padding: 0.8rem 1rem;
            }
            .topic-card {
                min-height: auto;
            }
            .tips-card {
                padding: 1.2rem;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            * ,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
            .btn:hover,
            .card:hover,
            .topic-card:hover,
            .tips-card:hover {
                transform: none;
            }
        }

/* roulang page: article */
:root {
            --night-950: #0B0D10;
            --night-900: #12151A;
            --night-850: #181C23;
            --night-800: #1E242D;
            --accent: #2CE0B5;
            --accent-strong: #1FC99C;
            --accent-2: #FF6A4D;
            --text-primary: #F4F7FA;
            --text-secondary: #C9D0DA;
            --muted: #8E98A8;
            --line: rgba(255,255,255,0.08);
            --card-bg: #14181E;
            --surface: #0F1216;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 18px rgba(0,0,0,0.25);
            --shadow-card-hover: 0 12px 34px rgba(0,0,0,0.45);
            --transition-base: all .25s ease;
            --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--night-950);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-strong);
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        * {
            box-sizing: border-box;
        }
        .container {
            max-width: 1200px;
        }
        section {
            padding: 3.5rem 0;
        }
        @media (max-width: 768px) {
            section {
                padding: 2.5rem 0;
            }
        }
        @media (max-width: 576px) {
            section {
                padding: 2rem 0;
            }
        }
        /* ====== 按钮重塑 ====== */
        .btn {
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.7rem 1.6rem;
            transition: var(--transition-base);
            border: none;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            background-color: var(--accent);
            color: var(--night-950);
            border: 2px solid var(--accent);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--accent-strong);
            border-color: var(--accent-strong);
            color: var(--night-950);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(44,224,181,0.3);
        }
        .btn-outline-accent {
            background-color: transparent;
            color: var(--text-primary);
            border: 2px solid var(--line);
        }
        .btn-outline-accent:hover,
        .btn-outline-accent:focus {
            background-color: rgba(255,255,255,0.05);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-accent-2 {
            background-color: var(--accent-2);
            color: #fff;
            border: 2px solid var(--accent-2);
        }
        .btn-accent-2:hover,
        .btn-accent-2:focus {
            background-color: #ff7a5f;
            border-color: #ff7a5f;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255,106,77,0.3);
        }
        .btn-lg {
            padding: 0.85rem 2rem;
            font-size: 1rem;
        }
        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
        }
        /* ====== 卡片重塑 ====== */
        .card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-img) var(--radius-img) 0 0;
            background-color: var(--night-800);
        }
        /* ====== 导航样式 ====== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background-color: rgba(11,13,16,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
        }
        .nav-row-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 0.8rem 0;
            flex-wrap: wrap;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--text-primary);
            text-decoration: none;
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-strong));
            color: var(--night-950);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .brand-badge {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-pill);
            margin-left: 0.3rem;
            white-space: nowrap;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1;
            max-width: 380px;
            min-width: 200px;
        }
        .nav-search .form-control {
            background-color: var(--surface);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.55rem 1.2rem;
            font-size: 0.9rem;
        }
        .nav-search .form-control::placeholder {
            color: var(--muted);
        }
        .nav-search .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: var(--surface);
            color: var(--text-primary);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-row-channels {
            padding: 0.4rem 0 0.7rem;
        }
        .channel-tabs {
            display: flex;
            align-items: center;
            gap: 0.45rem;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--night-800) transparent;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 2px;
        }
        .channel-tabs::-webkit-scrollbar {
            height: 4px;
        }
        .channel-tabs::-webkit-scrollbar-track {
            background: transparent;
        }
        .channel-tabs::-webkit-scrollbar-thumb {
            background: var(--night-800);
            border-radius: 999px;
        }
        .channel-tab {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.45rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
            background-color: rgba(255,255,255,0.04);
            border: 1px solid transparent;
            transition: var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
        }
        .channel-tab i {
            font-size: 0.9rem;
        }
        .channel-tab:hover {
            color: var(--text-primary);
            background-color: rgba(255,255,255,0.08);
            border-color: var(--line);
            text-decoration: none;
        }
        .channel-tab.active {
            color: var(--accent);
            background-color: rgba(44,224,181,0.12);
            border-color: rgba(44,224,181,0.35);
        }
        .channel-tab:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        @media (max-width: 768px) {
            .nav-row-top {
                gap: 0.6rem;
            }
            .brand {
                font-size: 1.05rem;
            }
            .brand-badge {
                font-size: 0.65rem;
                padding: 0.1rem 0.45rem;
            }
            .nav-search {
                order: 3;
                max-width: 100%;
                width: 100%;
            }
            .nav-cta .btn {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }
            .channel-tab {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 576px) {
            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
                border-radius: 8px;
            }
            .brand-badge {
                display: none;
            }
            .channel-tab {
                padding: 0.35rem 0.7rem;
                font-size: 0.75rem;
                gap: 0.35rem;
            }
            .channel-tab i {
                font-size: 0.75rem;
            }
        }
        /* ====== 面包屑 ====== */
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            list-style: none;
            padding: 0;
            margin: 0;
            font-size: 0.85rem;
            color: var(--muted);
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .breadcrumb-custom li + li::before {
            content: "/";
            color: var(--muted);
            margin-right: 0.5rem;
        }
        .breadcrumb-custom a {
            color: var(--muted);
            font-weight: 500;
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom li:last-child {
            color: var(--text-secondary);
            font-weight: 600;
        }
        /* ====== 文章头部 ====== */
        .article-head {
            padding: 2.8rem 0 1.8rem;
        }
        .article-head .article-category {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.3rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent);
            background-color: rgba(44,224,181,0.12);
            border: 1px solid rgba(44,224,181,0.3);
            margin-bottom: 1.2rem;
        }
        .article-head h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 1.2rem;
            letter-spacing: -0.01em;
        }
        .article-head .article-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 800px;
            margin-bottom: 1.2rem;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.2rem;
            font-size: 0.85rem;
            color: var(--muted);
            padding-top: 1rem;
            border-top: 1px solid var(--line);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-meta i {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .article-head h1 {
                font-size: 1.8rem;
            }
            .article-head .article-subtitle {
                font-size: 1rem;
            }
            .article-meta {
                gap: 0.8rem;
                font-size: 0.78rem;
            }
        }
        @media (max-width: 576px) {
            .article-head {
                padding: 2rem 0 1.2rem;
            }
            .article-head h1 {
                font-size: 1.5rem;
                line-height: 1.35;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.45rem;
            }
        }
        /* ====== 正文排版 ====== */
        .article-body {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 2.5rem 2.8rem;
            box-shadow: var(--shadow-card);
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 1.02rem;
            max-width: 840px;
            margin: 0 auto;
        }
        .article-body > *:first-child {
            margin-top: 0;
        }
        .article-body > *:last-child {
            margin-bottom: 0;
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2rem 0 1rem;
            line-height: 1.35;
            padding-top: 0.8rem;
            border-top: 1px solid var(--line);
        }
        .article-body h2:first-child {
            border-top: none;
            padding-top: 0;
            margin-top: 0;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 1.8rem 0 0.8rem;
            line-height: 1.4;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 1.5rem 0 0.6rem;
            line-height: 1.4;
        }
        .article-body p {
            margin: 0 0 1.2rem;
            line-height: 1.8;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.3rem 1.5rem;
            padding: 0;
        }
        .article-body li {
            margin-bottom: 0.55rem;
            line-height: 1.75;
            padding-left: 0.3rem;
        }
        .article-body li::marker {
            color: var(--accent);
        }
        .article-body blockquote {
            background-color: var(--night-900);
            border-left: 3px solid var(--accent);
            border-radius: 8px;
            padding: 1.2rem 1.5rem;
            margin: 1.5rem 0;
            color: var(--text-primary);
            font-style: italic;
            font-size: 1.02rem;
        }
        .article-body blockquote p {
            margin: 0;
        }
        .article-body img {
            border-radius: var(--radius-img);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-card);
            max-width: 100%;
            height: auto;
        }
        .article-body code {
            background-color: var(--night-850);
            color: var(--accent);
            padding: 0.15rem 0.45rem;
            border-radius: 4px;
            font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
            font-size: 0.9em;
        }
        .article-body pre {
            background-color: var(--night-950);
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 1.2rem 1.5rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            line-height: 1.6;
        }
        .article-body pre code {
            background: none;
            color: var(--text-secondary);
            padding: 0;
            font-size: 0.9rem;
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--accent-strong);
        }
        .article-body hr {
            border: none;
            border-top: 1px solid var(--line);
            margin: 2rem 0;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: 1.8rem 1.4rem;
                font-size: 1rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
        }
        @media (max-width: 576px) {
            .article-body {
                padding: 1.5rem 1.1rem;
                font-size: 0.98rem;
            }
        }
        /* ====== 相关推荐 ====== */
        .related-section {
            background-color: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .related-section .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .related-section .section-header h2 {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 0;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .related-section .section-header h2 i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .related-card {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
            box-shadow: var(--shadow-card);
        }
        .related-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .related-card .card-img-box {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-img) var(--radius-img) 0 0;
            height: 180px;
            background-color: var(--night-800);
        }
        .related-card .card-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .related-card:hover .card-img-box img {
            transform: scale(1.05);
        }
        .related-card .card-img-box .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11,13,16,0) 30%, rgba(11,13,16,0.8) 100%);
        }
        .related-card .card-body-content {
            padding: 1.2rem 1.3rem 1.4rem;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
            flex: 1;
        }
        .related-card .badge-category {
            display: inline-flex;
            width: fit-content;
            padding: 0.25rem 0.8rem;
            border-radius: var(--radius-pill);
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--accent);
            background: rgba(44,224,181,0.12);
            border: 1px solid rgba(44,224,181,0.3);
        }
        .related-card .card-title-link {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.45;
            text-decoration: none;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title-link:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .related-card .card-desc {
            font-size: 0.88rem;
            color: var(--muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-size: 0.75rem;
            color: var(--muted);
            margin-top: auto;
            padding-top: 0.4rem;
            border-top: 1px solid var(--line);
        }
        .related-card .card-meta i {
            color: var(--accent);
            font-size: 0.7rem;
        }
        @media (max-width: 768px) {
            .related-card .card-img-box {
                height: 150px;
            }
            .related-section .section-header h2 {
                font-size: 1.4rem;
            }
        }
        /* ====== 订阅 CTA ====== */
        .cta-card {
            background: linear-gradient(160deg, var(--night-900), var(--card-bg));
            border: 1px solid rgba(44,224,181,0.25);
            border-radius: var(--radius-card);
            padding: 3rem 2.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }
        .cta-card::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(44,224,181,0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,106,77,0.1), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 2rem;
            position: relative;
            z-index: 1;
        }
        .cta-card .cta-form {
            display: flex;
            gap: 0.8rem;
            max-width: 520px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-card .form-control {
            flex: 1;
            min-width: 240px;
            background-color: var(--night-950);
            border: 1px solid var(--line);
            color: var(--text-primary);
            border-radius: var(--radius-pill);
            padding: 0.8rem 1.4rem;
            font-size: 0.95rem;
        }
        .cta-card .form-control::placeholder {
            color: var(--muted);
        }
        .cta-card .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            background-color: var(--night-950);
            color: var(--text-primary);
        }
        .cta-card .btn-primary {
            padding: 0.8rem 1.8rem;
            white-space: nowrap;
        }
        @media (max-width: 768px) {
            .cta-card {
                padding: 2.2rem 1.4rem;
            }
            .cta-card h2 {
                font-size: 1.5rem;
            }
            .cta-card .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-card .form-control {
                width: 100%;
                min-width: 0;
            }
            .cta-card .btn-primary {
                width: 100%;
            }
        }
        /* ====== FAQ 简版 ====== */
        .accordion-custom .accordion-item {
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card) !important;
            margin-bottom: 0.8rem;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background-color: var(--card-bg);
            color: var(--text-primary);
            border: none;
            border-radius: var(--radius-card) !important;
            padding: 1.2rem 1.5rem;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background-color: var(--card-bg);
            color: var(--accent);
            box-shadow: none;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(44,224,181,0.2);
            z-index: 1;
        }
        .accordion-custom .accordion-button::after {
            filter: invert(1) brightness(0.7) sepia(1) saturate(2000%) hue-rotate(130deg);
        }
        .accordion-custom .accordion-body {
            background-color: var(--card-bg);
            color: var(--text-secondary);
            padding: 0 1.5rem 1.3rem;
            line-height: 1.75;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .accordion-custom .accordion-button {
                padding: 1rem 1.2rem;
                font-size: 0.92rem;
            }
            .accordion-custom .accordion-body {
                padding: 0 1.2rem 1rem;
                font-size: 0.88rem;
            }
        }
        /* ====== 返回入口 ====== */
        .back-entry {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: center;
            background-color: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 1.5rem 2rem;
        }
        .back-entry a {
            font-weight: 600;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
        }
        /* ====== 分享条 ====== */
        .share-bar {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            flex-wrap: wrap;
            padding: 1.5rem 0;
            border-bottom: 1px solid var(--line);
        }
        .share-bar .share-label {
            font-size: 0.9rem;
            color: var(--muted);
            font-weight: 600;
        }
        .share-bar .share-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-pill);
            background-color: rgba(255,255,255,0.06);
            border: 1px solid var(--line);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 600;
            transition: var(--transition-base);
        }
        .share-bar .share-btn:hover {
            background-color: rgba(44,224,181,0.12);
            border-color: rgba(44,224,181,0.35);
            color: var(--accent);
            text-decoration: none;
        }
        /* ====== 标签区 ====== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            padding: 1rem 0;
        }
        .tag-list .tag-pill {
            padding: 0.3rem 0.9rem;
            border-radius: var(--radius-pill);
            background-color: rgba(255,255,255,0.06);
            border: 1px solid var(--line);
            color: var(--text-secondary);
            font-size: 0.78rem;
            font-weight: 600;
            transition: var(--transition-base);
        }
        .tag-list .tag-pill:hover {
            background-color: rgba(44,224,181,0.12);
            border-color: rgba(44,224,181,0.35);
            color: var(--accent);
            text-decoration: none;
        }
        /* ====== 内容未找到 ====== */
        .not-found-box {
            text-align: center;
            padding: 4rem 2rem;
            background-color: var(--card-bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
        }
        .not-found-box .nf-icon {
            font-size: 3.5rem;
            color: var(--accent);
            margin-bottom: 1.5rem;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .not-found-box p {
            color: var(--muted);
            margin-bottom: 2rem;
        }
        /* ====== 页脚 ====== */
        .site-footer {
            background-color: var(--night-950);
            border-top: 1px solid var(--line);
            padding: 3rem 0 1.5rem;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-primary);
            display: block;
            margin-bottom: 0.8rem;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }
        .footer-links a {
            font-size: 0.88rem;
            color: var(--muted);
            transition: var(--transition-base);
            text-decoration: none;
        }
        .footer-links a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 1.2rem;
        }
        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--muted);
            margin: 0;
            text-align: center;
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .footer-desc {
                max-width: 100%;
            }
        }
        /* ====== 无障碍动效 ====== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
            .card:hover,
            .related-card:hover,
            .btn:hover,
            .btn:focus {
                transform: none;
            }
        }

/* 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}