/* roulang page: index */
:root {
            --primary: #1E60D5;
            --primary-dark: #0D47A1;
            --primary-light: #EFF6FF;
            --accent: #FEF08A;
            --accent-orange: #F59E0B;
            --bg-canvas: #F4F7FC;
            --bg-card: #FFFFFF;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-soft: 0 10px 25px -5px rgba(30, 96, 213, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 20px 30px -10px rgba(30, 96, 213, 0.16);
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 9999px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Global */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--bg-canvas);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 15px;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 悬浮胶囊导航 */
        .header-capsule-wrapper {
            position: sticky;
            top: 16px;
            z-index: 1000;
            padding: 0 20px;
        }
        .header-capsule {
            max-width: 1160px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(226, 232, 240, 0.85);
            border-radius: var(--radius-pill);
            padding: 8px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
        }
        .nav-brand-badge {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: var(--radius-pill);
        }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 20px;
            margin: 0;
        }
        .nav-links a {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-body);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            background-color: var(--primary-light);
        }
        .nav-action .btn-nav {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            font-size: 0.88rem;
            font-weight: 600;
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(30, 96, 213, 0.25);
            transition: var(--transition);
        }
        .nav-action .btn-nav:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        /* 基础容器与板块样式 */
        .section-wrap {
            padding: 85px 0;
            position: relative;
        }
        .section-wrap-white {
            background: #FFFFFF;
        }
        .section-wrap-muted {
            background: var(--bg-canvas);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            border: 1px solid rgba(30, 96, 213, 0.15);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 780px;
            line-height: 1.7;
        }

        /* 知识库高亮标记组件 */
        .marker-highlight {
            background: linear-gradient(180deg, transparent 65%, var(--accent) 65%);
            padding: 0 4px;
            font-weight: 700;
            color: var(--text-heading);
        }

        /* 1. Hero 板块：线索获客提问式首屏 */
        .hero-section {
            padding: 60px 0 90px;
            position: relative;
            background-color: #FFFFFF;
            overflow: hidden;
            border-bottom: 1px solid var(--border-light);
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            opacity: 0.04;
            background-image: url('/assets/images/b4ab5a0901743d3f.jpg');
            background-size: cover;
            background-position: center;
            pointer-events: none;
        }
        .hero-inner {
            display: grid;
            grid-template-columns: 1.25fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-content h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-desc {
            font-size: 1.08rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .hero-meta-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 30px;
        }
        .hero-meta-item {
            background: var(--primary-light);
            border: 1px solid rgba(30, 96, 213, 0.12);
            padding: 6px 14px;
            border-radius: var(--radius-md);
            font-size: 0.85rem;
            color: var(--primary-dark);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-form-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-soft);
            position: relative;
        }
        .hero-form-card h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .hero-form-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 6px;
            display: block;
        }
        .form-control {
            width: 100%;
            height: 48px;
            padding: 0 16px;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            font-size: 0.95rem;
            background: #FAFCFF;
            color: var(--text-heading);
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(30, 96, 213, 0.12);
        }
        .btn-submit {
            width: 100%;
            height: 50px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1.05rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            box-shadow: 0 6px 16px rgba(30, 96, 213, 0.3);
            transition: var(--transition);
        }
        .btn-submit:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* 2. 痛点归纳对比卡 */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .pain-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            transition: var(--transition);
            position: relative;
        }
        .pain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .pain-icon-wrapper {
            width: 46px;
            height: 46px;
            border-radius: 10px;
            background: #FEE2E2;
            color: #DC2626;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .pain-card h3 {
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .pain-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 3. 全链路低延迟架构方案 (Bento 风格) */
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }
        .bento-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
        }
        .bento-span-8 {
            grid-column: span 8;
        }
        .bento-span-4 {
            grid-column: span 4;
        }
        .bento-item h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 14px;
        }
        .bento-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .bento-code-box {
            background: #0F172A;
            color: #E2E8F0;
            padding: 16px 20px;
            border-radius: 8px;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 0.85rem;
            line-height: 1.6;
        }

        /* 4. 内容日历板块 */
        .calendar-table {
            width: 100%;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            border-collapse: collapse;
        }
        .calendar-table th, .calendar-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid var(--border-light);
        }
        .calendar-table th {
            background: #F8FAFC;
            font-weight: 700;
            color: var(--text-heading);
            font-size: 0.95rem;
        }
        .calendar-table tr:hover td {
            background: #F8FBFF;
        }
        .status-badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 700;
        }
        .status-active {
            background: #DCFCE7;
            color: #166534;
        }
        .status-standby {
            background: #FEF3C7;
            color: #92400E;
        }

        /* 5. 热门专题矩阵 */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .topic-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .topic-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .topic-card h4 {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .topic-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .topic-link {
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .topic-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* 6. 观点解读与专家评测 */
        .opinion-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .opinion-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-soft);
        }
        .opinion-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .opinion-card p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .opinion-author {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .opinion-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        /* 7. 核心实测成果看板 */
        .metrics-banner {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-box {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            text-align: center;
            box-shadow: var(--shadow-soft);
        }
        .metric-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-title {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }
        .metric-desc {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* 8. 资讯与技术前沿专栏 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .news-thumb {
            width: 100%;
            height: 190px;
            object-fit: cover;
            aspect-ratio: 16/9;
        }
        .news-body {
            padding: 24px;
        }
        .news-tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 8px;
            border-radius: 4px;
            margin-bottom: 10px;
            display: inline-block;
        }
        .news-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .news-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 9. 媒体精选与高光实测 */
        .media-strip {
            display: grid;
            grid-template-columns: 1fr 1.3fr;
            gap: 40px;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            align-items: center;
        }
        .media-strip-img {
            border-radius: var(--radius-md);
            width: 100%;
            height: 320px;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .media-strip-content h3 {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 16px;
        }
        .media-strip-content p {
            font-size: 0.98rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .media-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .media-feature-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-heading);
            font-weight: 600;
        }
        .media-feature-bullet {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            margin-top: 6px;
            flex-shrink: 0;
        }

        /* 10. 数据分析与网络性能对照表 */
        .perf-table-wrapper {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            overflow-x: auto;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
        }
        .perf-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        .perf-table th, .perf-table td {
            padding: 16px 22px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.92rem;
        }
        .perf-table th {
            background: #F8FAFC;
            color: var(--text-heading);
            font-weight: 700;
        }
        .perf-table td {
            color: var(--text-body);
        }
        .perf-bar-wrap {
            width: 120px;
            height: 8px;
            background: #EEF2F6;
            border-radius: 4px;
            overflow: hidden;
            display: inline-block;
            vertical-align: middle;
            margin-right: 8px;
        }
        .perf-bar-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 4px;
        }

        /* 11. 适用人群与播放场景矩阵 */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
        }
        .scenario-tag {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--accent-orange);
            background: #FEF3C7;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            display: inline-block;
            margin-bottom: 14px;
        }
        .scenario-card h3 {
            font-size: 1.22rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .scenario-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 12. 标准化使用四步法 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-box {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 26px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
            position: relative;
        }
        .step-num {
            font-size: 1.8rem;
            font-weight: 900;
            color: rgba(30, 96, 213, 0.18);
            line-height: 1;
            margin-bottom: 12px;
        }
        .step-box h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .step-box p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 13. 平台保障承诺条 */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .guarantee-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-soft);
        }
        .guarantee-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            margin: 0 auto 14px;
        }
        .guarantee-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .guarantee-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 14. 核心资源专题索引池 (受控分类页入口) */
        .category-portal-box {
            background: linear-gradient(135deg, #1E60D5 0%, #0D47A1 100%);
            border-radius: var(--radius-lg);
            padding: 48px;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            box-shadow: 0 16px 36px rgba(13, 71, 161, 0.25);
        }
        .category-portal-text h3 {
            font-size: 1.85rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .category-portal-text p {
            font-size: 1.02rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            line-height: 1.7;
        }
        .category-portal-btn {
            background: #FFFFFF;
            color: var(--primary-dark);
            font-size: 1rem;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }
        .category-portal-btn:hover {
            background: var(--accent);
            color: #0F172A;
            transform: translateY(-2px);
        }

        /* 15. 订阅通知与更新通道 */
        .newsletter-wrapper {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 44px;
            text-align: center;
            box-shadow: var(--shadow-soft);
            max-width: 860px;
            margin: 0 auto;
        }
        .newsletter-wrapper h3 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .newsletter-wrapper p {
            font-size: 0.96rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .newsletter-form {
            display: flex;
            gap: 12px;
            max-width: 560px;
            margin: 0 auto;
        }
        .newsletter-input {
            flex: 1;
            height: 48px;
            padding: 0 18px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            background: #FAFCFF;
            color: var(--text-heading);
            outline: none;
        }
        .newsletter-input:focus {
            border-color: var(--primary);
            background: #FFFFFF;
        }
        .newsletter-btn {
            background: var(--primary);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 0 28px;
            border: none;
            border-radius: var(--radius-pill);
            cursor: pointer;
            transition: var(--transition);
        }
        .newsletter-btn:hover {
            background: var(--primary-dark);
        }

        /* 页脚统一规范 */
        .site-footer {
            background: #0B132B;
            color: #94A3B8;
            padding: 64px 0 32px;
            border-top: 1px solid #1E293B;
            font-size: 0.88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 1.25rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-brand p {
            line-height: 1.8;
            color: #94A3B8;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-links-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links-list li {
            margin-bottom: 10px;
        }
        .footer-links-list a {
            color: #94A3B8;
        }
        .footer-links-list a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            padding-top: 28px;
            border-top: 1px solid #1E293B;
            text-align: center;
            font-size: 0.82rem;
            color: #64748B;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .bento-span-8, .bento-span-4 {
                grid-column: span 12;
            }
            .metrics-banner, .topics-grid, .steps-container, .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .media-strip {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-capsule {
                padding: 8px 16px;
            }
            .nav-brand {
                font-size: 1rem;
            }
            .nav-links {
                display: none;
            }
            .section-wrap {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .pain-grid, .news-grid, .scenario-grid, .opinion-grid {
                grid-template-columns: 1fr;
            }
            .category-portal-box {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
            }
            .newsletter-form {
                flex-direction: column;
            }
            .newsletter-btn {
                height: 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .metrics-banner, .topics-grid, .steps-container, .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 1.85rem;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #1E60D5;
      --primary-dark: #0D47A1;
      --primary-light: #EFF6FF;
      --accent: #FEF08A;
      --accent-orange: #F59E0B;
      --bg-canvas: #F4F7FC;
      --bg-card: #FFFFFF;
      --text-heading: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-soft: 0 10px 25px -5px rgba(30, 96, 213, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(30, 96, 213, 0.16);
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: var(--bg-canvas);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 15px;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .header-capsule-wrapper {
      position: sticky;
      top: 16px;
      z-index: 1000;
      padding: 0 20px;
    }
    .header-capsule {
      max-width: 1160px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(226, 232, 240, 0.85);
      border-radius: var(--radius-pill);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.15rem;
      color: var(--primary-dark);
      letter-spacing: -0.3px;
    }
    .nav-brand-badge {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: var(--radius-pill);
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 20px;
      margin: 0;
    }
    .nav-links a {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-body);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .nav-action .btn-nav {
      background: var(--primary);
      color: #fff;
      padding: 8px 20px;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: var(--radius-pill);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(30, 96, 213, 0.25);
      transition: var(--transition);
      display: inline-block;
    }
    .nav-action .btn-nav:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-wrap-white {
      background: #FFFFFF;
    }
    .section-wrap-muted {
      background: var(--bg-canvas);
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
      border: 1px solid rgba(30, 96, 213, 0.15);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-heading);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

    /* Category Hero: API & Developer Schema */
    .cat-hero {
      padding: 50px 0 70px;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
      position: relative;
      overflow: hidden;
    }
    .cat-hero-bg {
      position: absolute;
      inset: 0;
      background: url('/assets/images/437f3bd3c6ac2990.jpg') center/cover no-repeat;
      opacity: 0.05;
      pointer-events: none;
    }
    .cat-breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .cat-breadcrumb a:hover {
      color: var(--primary);
    }
    .cat-hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .cat-hero-content h1 {
      font-size: 2.35rem;
      font-weight: 800;
      color: var(--text-heading);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .cat-hero-desc {
      font-size: 1.05rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .cat-stats-row {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 28px;
    }
    .cat-stat-chip {
      background: var(--bg-canvas);
      border: 1px solid var(--border-light);
      padding: 8px 16px;
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
    }
    .cat-stat-chip span:first-child {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .cat-stat-chip span:last-child {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary-dark);
    }
    .code-schema-box {
      background: #0F172A;
      color: #E2E8F0;
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-soft);
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.85rem;
      line-height: 1.6;
      border: 1px solid #1E293B;
    }
    .code-schema-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #334155;
      padding-bottom: 10px;
      margin-bottom: 14px;
      font-size: 0.75rem;
      color: #94A3B8;
    }
    .code-dots {
      display: flex;
      gap: 6px;
    }
    .code-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .code-dot.red { background: #EF4444; }
    .code-dot.yellow { background: #F59E0B; }
    .code-dot.green { background: #10B981; }
    .code-line {
      margin-bottom: 4px;
    }
    .code-key { color: #38BDF8; }
    .code-val { color: #A7F3D0; }
    .code-comment { color: #64748B; }

    /* Filter Matrix */
    .filter-section {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-soft);
      border: 1px solid var(--border-light);
      margin-bottom: 40px;
    }
    .filter-group {
      display: flex;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-light);
    }
    .filter-group:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-label {
      width: 100px;
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text-heading);
      flex-shrink: 0;
    }
    .filter-options {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .filter-btn {
      padding: 5px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-body);
      border-radius: var(--radius-pill);
      background: var(--bg-canvas);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
    }
    .filter-btn:hover {
      background: var(--primary-light);
      color: var(--primary);
    }
    .filter-btn.active {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      box-shadow: 0 2px 8px rgba(30, 96, 213, 0.3);
    }

    /* Media Grid Cards */
    .resource-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 28px;
    }
    .resource-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .resource-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(30, 96, 213, 0.25);
    }
    .card-thumb-wrap {
      position: relative;
      aspect-ratio: 16 / 10;
      background: #E2E8F0;
      overflow: hidden;
    }
    .card-thumb-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .resource-card:hover .card-thumb-wrap img {
      transform: scale(1.04);
    }
    .card-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(15, 23, 42, 0.75);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }
    .card-res {
      position: absolute;
      top: 10px;
      right: 10px;
      background: var(--primary);
      color: #fff;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 2px 7px;
      border-radius: 4px;
    }
    .card-duration {
      position: absolute;
      bottom: 10px;
      right: 10px;
      background: rgba(0, 0, 0, 0.7);
      color: #fff;
      font-size: 0.75rem;
      padding: 2px 6px;
      border-radius: 4px;
    }
    .card-body {
      padding: 18px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .card-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.78rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-light);
      padding-top: 12px;
    }
    .card-meta-tag {
      color: var(--primary);
      font-weight: 600;
    }

    /* Featured Highlights */
    .featured-box {
      background: linear-gradient(135deg, #FFFFFF 0%, #F8FAFC 100%);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-soft);
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      align-items: center;
      margin-top: 40px;
    }
    .featured-tag {
      background: var(--accent);
      color: #854D0E;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      display: inline-block;
      margin-bottom: 12px;
    }
    .featured-title {
      font-size: 1.65rem;
      font-weight: 800;
      color: var(--text-heading);
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .featured-p {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .featured-specs {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }
    .spec-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      padding: 12px;
      border-radius: var(--radius-md);
    }
    .spec-name {
      font-size: 0.78rem;
      color: var(--text-muted);
    }
    .spec-val {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--primary-dark);
    }

    /* Note Banner */
    .note-banner {
      background: #EFF6FF;
      border-left: 4px solid var(--primary);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      padding: 24px 30px;
      margin-top: 40px;
    }
    .note-banner h4 {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .note-banner p {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.65;
      margin: 0;
    }

    /* FAQ Accordion */
    .accordion-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px 26px;
      box-shadow: var(--shadow-soft);
    }
    .accordion-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .accordion-item h4::before {
      content: "Q";
      display: inline-block;
      width: 24px;
      height: 24px;
      line-height: 24px;
      text-align: center;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 800;
      border-radius: 6px;
    }
    .accordion-item p {
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding-left: 34px;
    }

    /* Pagination CTA */
    .load-more-box {
      text-align: center;
      padding: 50px 0 20px;
    }
    .btn-load-more {
      background: #FFFFFF;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 12px 36px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: var(--radius-pill);
      cursor: pointer;
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
      display: inline-block;
    }
    .btn-load-more:hover {
      background: var(--primary);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    /* Footer */
    .site-footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1fr 1fr;
      gap: 50px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.8;
      color: #94A3B8;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-links-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: #94A3B8;
      font-size: 0.88rem;
    }
    .footer-links-list a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 26px;
      text-align: center;
      font-size: 0.82rem;
      color: #64748B;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .cat-hero-grid,
      .featured-box,
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }
    @media (max-width: 768px) {
      .header-capsule {
        padding: 6px 16px;
      }
      .nav-links {
        gap: 10px;
      }
      .nav-links a {
        padding: 4px 8px;
        font-size: 0.82rem;
      }
      .cat-hero-content h1 {
        font-size: 1.85rem;
      }
      .section-wrap {
        padding: 50px 0;
      }
      .filter-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
    }