/* roulang page: index */
:root {
            --primary: #2B5E9E;
            --primary-deep: #1B3F6B;
            --primary-light: #EAF1F8;
            --accent: #F2784B;
            --accent-hover: #E0663B;
            --data-accent: #1FA97C;
            --bg-page: #F4F7FA;
            --bg-card: #FFFFFF;
            --bg-testimonial: #FBF3EF;
            --text-primary: #1E2A38;
            --text-secondary: #5E6E7E;
            --text-muted: #9AA8B6;
            --border: #E2E8F0;
            --footer-bg: #16283B;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-img: 18px;
            --radius-badge: 20px;
            --shadow-sm: 0 4px 20px rgba(30,42,56,0.08);
            --shadow-hover: 0 8px 28px rgba(30,42,56,0.14);
            --transition: 0.2s ease;
            --sidebar-width: 220px;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-deep);
        }

        button {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
        }

        .main-wrap {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        /* 左侧导航 */
        .app-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--border);
            z-index: 1030;
            display: flex;
            flex-direction: column;
        }

        .sidebar-brand {
            height: 72px;
            display: flex;
            align-items: center;
            padding: 0 1.25rem;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-right: 10px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--primary-deep);
            white-space: nowrap;
        }

        .sidebar-nav {
            flex: 1;
            padding: 1.25rem 0;
            overflow-y: auto;
        }

        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            height: 44px;
            padding: 0 1rem;
            margin: 2px 0;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .sidebar-nav .nav-item .nav-icon {
            margin-right: 10px;
            font-size: 1.125rem;
        }

        .sidebar-nav .nav-item:hover {
            background: var(--bg-page);
            color: var(--primary);
        }

        .sidebar-nav .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 500;
        }

        .sidebar-contact {
            padding: 1rem 1.25rem;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .sidebar-contact .contact-line {
            display: flex;
            align-items: center;
            margin-bottom: 4px;
        }

        .sidebar-contact .contact-line i {
            margin-right: 8px;
            font-size: 0.9375rem;
            color: var(--primary);
        }

        /* 移动端顶栏 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            z-index: 1020;
            align-items: center;
            padding: 0 1rem;
        }

        .mobile-header .mobile-brand {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--primary-deep);
            flex: 1;
            text-align: center;
        }

        .mobile-header .mobile-toggle {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 4px 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-header .mobile-contact {
            font-size: 0.8125rem;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-weight: 500;
        }

        /* Hero */
        .hero-section {
            background: var(--bg-page);
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 300px;
            height: 300px;
            border: 2px solid rgba(43, 94, 158, 0.1);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: 30%;
            width: 180px;
            height: 180px;
            border: 2px solid rgba(242, 120, 75, 0.1);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section .container {
            position: relative;
            z-index: 1;
        }

        .hero-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: var(--radius-badge);
            font-size: 0.8125rem;
            font-weight: 500;
            margin-bottom: 1rem;
            letter-spacing: 1px;
        }

        .hero-section h1 {
            font-size: clamp(2rem, 4vw, 3.25rem);
            line-height: 1.25;
            font-weight: 700;
            color: var(--primary-deep);
            margin-bottom: 1.25rem;
        }

        .hero-subtitle {
            font-size: 1.125rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            max-width: 480px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .hero-image {
            width: 100%;
            max-width: 560px;
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-hover);
            display: block;
            margin-left: auto;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: var(--radius-btn);
            padding: 0.75rem 1.5rem;
            font-size: 0.9375rem;
            font-weight: 500;
            min-width: 140px;
            border: none;
            transition: all var(--transition);
            cursor: pointer;
        }

        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(43, 94, 158, 0.25);
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary-custom:hover {
            background: #24507F;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .btn-outline-custom {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline-custom:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .btn-light-custom {
            background: #fff;
            color: var(--primary-deep);
        }

        .btn-light-custom:hover {
            background: #E8EEF4;
            color: var(--primary-deep);
        }

        .btn:active {
            transform: scale(0.98);
        }

        /* 区块间距 */
        .section-padding {
            padding: 5rem 0;
        }

        .section-title {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            color: var(--primary-deep);
            margin-bottom: 1rem;
            line-height: 1.4;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 3rem;
            max-width: 680px;
        }

        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* 痛点区 */
        .pain-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
        }

        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            height: 100%;
            transition: all var(--transition);
        }

        .pain-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .pain-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            margin-bottom: 1rem;
        }

        .pain-card h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }

        .pain-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* 解决方案 */
        .solution-section {
            background: var(--bg-page);
        }

        .solution-step {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 2.5rem;
            position: relative;
        }

        .solution-step:last-child {
            margin-bottom: 0;
        }

        .solution-step:not(:last-child)::after {
            content: "";
            position: absolute;
            left: 24px;
            top: 56px;
            bottom: -20px;
            width: 2px;
            background: var(--primary);
            opacity: 0.25;
        }

        .step-badge {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 1.125rem;
            flex-shrink: 0;
            z-index: 1;
        }

        .step-body {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .step-body h3 {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.375rem;
        }

        .step-body p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
            line-height: 1.7;
        }

        .step-body .step-img {
            width: 100%;
            max-width: 180px;
            height: auto;
            border-radius: var(--radius-card);
            align-self: flex-start;
        }

        /* 数据区 */
        .results-section {
            background: var(--primary-deep);
            padding: 5rem 0;
            color: #fff;
        }

        .results-section .section-title {
            color: #fff;
        }

        .results-section .section-subtitle {
            color: rgba(255, 255, 255, 0.75);
        }

        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
            border-left: 1px solid rgba(255, 255, 255, 0.12);
        }

        .stat-item:first-child {
            border-left: none;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .stat-number .stat-unit {
            font-size: 1.125rem;
            margin-left: 4px;
            color: rgba(255, 255, 255, 0.85);
        }

        .stat-label {
            margin-top: 0.5rem;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.75);
        }

        .stat-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--data-accent);
            margin-right: 6px;
        }

        /* 最新资讯 CMS */
        .news-section {
            background: var(--bg-page);
            padding: 5rem 0;
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 2rem;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .section-header .view-more {
            font-size: 0.875rem;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .section-header .view-more:hover {
            color: var(--primary-deep);
        }

        .news-item {
            display: flex;
            gap: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 1rem;
            box-shadow: var(--shadow-sm);
            margin-bottom: 1rem;
            transition: all var(--transition);
        }

        .news-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .news-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 78px;
            overflow: hidden;
            border-radius: 8px;
            display: block;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

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

        .news-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 4px;
        }

        .news-category {
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-badge);
            padding: 2px 10px;
            font-size: 0.75rem;
            font-weight: 500;
            white-space: nowrap;
        }

        .news-time {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .news-heading {
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-heading a {
            color: var(--text-primary);
        }

        .news-heading a:hover {
            color: var(--primary);
        }

        .news-summary {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-bottom: 2px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }

        .news-more {
            font-size: 0.8125rem;
            color: var(--accent);
            font-weight: 500;
        }

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

        /* 空状态 */
        .empty-state {
            text-align: center;
            padding: 3rem 1rem;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px dashed var(--border);
        }

        .empty-state .empty-icon {
            font-size: 3rem;
            color: var(--text-muted);
            display: block;
            margin-bottom: 1rem;
        }

        .empty-state h4 {
            font-size: 1.125rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }

        .empty-state p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* 证言 */
        .testimonial-section {
            background: var(--bg-testimonial);
            padding: 5rem 0;
        }

        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 1.75rem;
            height: 100%;
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .testimonial-quote {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
            line-height: 1;
        }

        .testimonial-text {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 0.875rem;
        }

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 0.9375rem;
            flex-shrink: 0;
        }

        .author-name {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .author-role {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 0.75rem;
            box-shadow: 0 2px 8px rgba(30, 42, 56, 0.04);
            overflow: hidden;
        }

        .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 1.25rem 1.5rem;
            border: none;
            text-align: left;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transition: var(--transition);
        }

        .accordion-button:hover {
            color: var(--primary);
        }

        .accordion-button i {
            color: var(--primary);
            font-size: 1.25rem;
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }

        .accordion-button[data-state="open"] i {
            transform: rotate(45deg);
        }

        .accordion-panel {
            display: none;
            padding: 0 1.5rem 1.25rem;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 1rem;
        }

        .accordion-panel.open {
            display: block;
        }

        /* CTA */
        .cta-section {
            background: var(--primary-deep);
            padding: 5rem 0;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 320px;
            height: 320px;
            border: 2px solid rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 2.5vw, 2.125rem);
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: #fff;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 2rem;
            font-size: 1rem;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .btn-accent {
            min-width: 180px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.85);
            padding: 4rem 0 0;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 600;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 0.75rem;
        }

        .footer-brand .brand-logo {
            width: 32px;
            height: 32px;
        }

        .footer-desc {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 1.5rem;
            max-width: 260px;
        }

        .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 0.75rem;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact-item i {
            color: var(--accent);
            font-size: 1rem;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.25rem 0;
            margin-top: 3rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom .footer-domain {
            font-family: monospace;
        }

        /* 移动端导航 offcanvas 自定义 */
        .offcanvas {
            width: 280px;
            background: #fff;
            border-right: none;
        }

        .offcanvas.offcanvas-start {
            border-right: none;
        }

        .offcanvas-header {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--border);
            background: #fff;
        }

        .offcanvas-brand {
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--primary-deep);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .offcanvas-brand .brand-logo {
            width: 28px;
            height: 28px;
            font-size: 0.875rem;
        }

        .btn-close {
            filter: none;
            opacity: 0.5;
        }

        .btn-close:hover {
            opacity: 0.8;
        }

        .offcanvas-body {
            padding: 0;
            display: flex;
            flex-direction: column;
        }

        .mobile-nav {
            padding: 1.25rem 0;
            flex: 1;
        }

        .mobile-nav .nav-link {
            display: flex;
            align-items: center;
            height: 44px;
            padding: 0 1.25rem;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            border-left: 3px solid transparent;
        }

        .mobile-nav .nav-link:hover {
            background: var(--bg-page);
            color: var(--primary);
        }

        .mobile-nav .nav-link.active {
            background: var(--primary-light);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 500;
        }

        .mobile-nav .nav-link .nav-icon {
            margin-right: 10px;
            font-size: 1.125rem;
        }

        .offcanvas-footer-contact {
            padding: 1rem 1.25rem;
            border-top: 1px solid var(--border);
        }

        .offcanvas-footer-contact .contact-line {
            display: flex;
            align-items: center;
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-bottom: 4px;
        }

        .offcanvas-footer-contact .contact-line i {
            margin-right: 8px;
            color: var(--primary);
        }

        .offcanvas-backdrop {
            background: rgba(15, 23, 42, 0.5);
        }

        /* Bootstrap 覆盖 */
        .btn {
            border-radius: var(--radius-btn);
        }

        a {
            text-decoration: none;
        }

        /* 辅助 */
        .bg-white-custom {
            background: #fff;
        }

        .border-light-custom {
            border-color: var(--border) !important;
        }

        .text-muted-custom {
            color: var(--text-muted) !important;
        }

        /* 响应式 */
        @media (max-width: 991.98px) {
            .app-sidebar {
                display: none;
            }

            .main-wrap {
                margin-left: 0;
                padding-top: 56px;
            }

            .mobile-header {
                display: flex;
            }

            .hero-section {
                padding: 3rem 0;
            }

            .hero-image {
                margin: 2rem auto 0;
                max-width: 100%;
            }

            .section-padding,
            .news-section,
            .results-section,
            .testimonial-section,
            .cta-section {
                padding: 3rem 0;
            }

            .pain-card {
                margin-bottom: 1rem;
            }

            .stat-item {
                border-left: none;
                border-top: 1px solid rgba(255, 255, 255, 0.12);
            }

            .stat-item:first-child {
                border-top: none;
            }

            .solution-step {
                gap: 1rem;
            }

            .step-body {
                padding: 1rem;
            }
        }

        @media (max-width: 767.98px) {
            .hero-section h1 {
                font-size: 1.875rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .hero-actions .btn {
                min-width: 120px;
                padding: 0.625rem 1.25rem;
            }

            .news-item {
                flex-direction: row;
            }

            .news-thumb {
                width: 96px;
                height: 64px;
            }

            .news-heading {
                white-space: normal;
                -webkit-line-clamp: 2;
                display: -webkit-box;
                -webkit-box-orient: vertical;
                overflow: hidden;
            }

            .section-title {
                font-size: 1.375rem;
            }

            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

        @media (max-width: 519.98px) {
            .solution-step {
                flex-direction: column;
            }

            .solution-step:not(:last-child)::after {
                left: 24px;
                top: 48px;
            }

            .step-body {
                width: 100%;
            }

            .step-body .step-img {
                max-width: 100%;
            }

            .news-item {
                padding: 0.75rem;
            }

            .news-thumb {
                width: 80px;
                height: 56px;
            }

            .news-summary {
                -webkit-line-clamp: 1;
            }

            .testimonial-card {
                padding: 1.25rem;
            }

            .stat-number {
                font-size: 2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2B5E9E;
            --primary-deep: #1B3F6B;
            --primary-light: #EAF1F8;
            --accent: #F2784B;
            --accent-hover: #E0663B;
            --bg: #F4F7FA;
            --card-bg: #FFFFFF;
            --warm-bg: #FBF3EF;
            --text: #1E2A38;
            --text-secondary: #5E6E7E;
            --text-muted: #9AA8B6;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-lg: 18px;
            --shadow: 0 4px 20px rgba(30, 42, 56, 0.08);
            --shadow-hover: 0 8px 28px rgba(30, 42, 56, 0.14);
            --transition: 0.2s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

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

        a:hover {
            color: #24507F;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        :focus-visible {
            outline: 3px solid rgba(43, 94, 158, 0.25);
            outline-offset: 2px;
        }

        .app-shell {
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 220px;
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 1030;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            height: 64px;
            padding: 0 1.25rem;
            border-bottom: 1px solid var(--border);
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text) !important;
            flex-shrink: 0;
        }

        .brand-badge {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 1.125rem;
            font-weight: 700;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .sidebar-nav {
            padding: 1rem 0;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 44px;
            padding: 0 1rem;
            margin: 0 0.5rem;
            border-radius: 8px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .sidebar-nav .nav-item:hover {
            background: var(--bg);
            color: var(--text);
        }

        .sidebar-nav .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            border-left: 3px solid var(--primary);
        }

        .sidebar-nav .nav-icon {
            font-size: 1.125rem;
            line-height: 1;
        }

        .sidebar-contact {
            padding: 1rem 1.25rem;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .sidebar-contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 4px;
        }

        .main-content {
            margin-left: 220px;
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .topbar {
            display: none;
            height: 56px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 1rem;
            position: sticky;
            top: 0;
            z-index: 1020;
        }

        .topbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
        }

        .topbar-brand .brand-badge {
            width: 30px;
            height: 30px;
            font-size: 0.875rem;
            border-radius: 8px;
        }

        .topbar .btn-topbar-contact {
            font-size: 0.8125rem;
            padding: 0.375rem 0.875rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-secondary);
            background: #fff;
            transition: all var(--transition);
        }

        .topbar .btn-topbar-contact:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        .btn-hamburger {
            background: none;
            border: none;
            font-size: 1.375rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: 8px;
            line-height: 1;
        }

        .btn-hamburger:hover {
            background: var(--bg);
        }

        .content-wrapper {
            flex: 1;
        }

        .container-page {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .section-block {
            padding: 5rem 0;
        }

        .section-block-sm {
            padding: 3rem 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 1rem;
        }

        .section-title {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        .hero-category {
            position: relative;
            padding: 6rem 0 5rem;
            background-color: var(--primary-deep);
            background-image: linear-gradient(rgba(27, 63, 107, 0.86), rgba(27, 63, 107, 0.9)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }

        .hero-category::after {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            border: 40px solid rgba(255, 255, 255, 0.06);
            top: -120px;
            right: -100px;
            pointer-events: none;
        }

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

        .hero-category .breadcrumb-custom {
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.5rem;
        }

        .hero-category .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.9);
        }

        .hero-category .breadcrumb-custom a:hover {
            text-decoration: underline;
        }

        .hero-category h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1rem;
            color: #fff;
        }

        .hero-category .hero-subtitle {
            font-size: 1.0625rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin-bottom: 2rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 8px;
            padding: 0.75rem 1.5rem;
            font-size: 0.9375rem;
            font-weight: 600;
            min-width: 140px;
            border: none;
            transition: all var(--transition);
        }

        .btn:active {
            transform: scale(0.98);
        }

        .btn-primary-brand {
            background: var(--primary);
            color: #fff !important;
        }

        .btn-primary-brand:hover {
            background: #24507F;
        }

        .btn-accent-brand {
            background: var(--accent);
            color: #fff !important;
        }

        .btn-accent-brand:hover {
            background: var(--accent-hover);
        }

        .btn-outline-light-brand {
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: #fff !important;
            background: transparent;
        }

        .btn-outline-light-brand:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }

        .btn-white-brand {
            background: #fff;
            color: var(--primary-deep) !important;
        }

        .btn-white-brand:hover {
            background: #E8EEF4;
        }

        .card-custom {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .card-custom:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .feature-card {
            padding: 1.5rem;
            height: 100%;
        }

        .feature-card .feature-icon {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            font-size: 1.25rem;
            margin-bottom: 1rem;
        }

        .feature-card .feature-title {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text);
        }

        .feature-card .feature-desc {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .content-list-card {
            display: flex;
            align-items: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.25rem;
            margin-bottom: 1.25rem;
            transition: all var(--transition);
        }

        .content-list-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .content-list-card .thumb-wrap {
            width: 240px;
            height: 160px;
            border-radius: var(--radius);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-light);
        }

        .content-list-card .thumb-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .content-list-card .card-body {
            padding: 0.25rem 0 0.25rem 1.5rem;
            flex: 1;
        }

        .content-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .badge-category {
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            padding: 3px 12px;
            font-size: 12px;
            font-weight: 600;
        }

        .badge-accent {
            background: var(--accent);
            color: #fff;
            border-radius: 4px;
            padding: 2px 8px;
            font-size: 11px;
            font-weight: 600;
        }

        .content-list-card .card-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .content-list-card .card-desc {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 0.75rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .link-read-more {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .link-read-more:hover {
            color: #24507F;
        }

        .scenario-item {
            display: flex;
            gap: 1rem;
            padding: 1.25rem;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            height: 100%;
            transition: all var(--transition);
        }

        .scenario-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .scenario-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            flex-shrink: 0;
        }

        .scenario-item h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .scenario-item p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        .process-section {
            background: var(--primary-deep);
            color: #fff;
        }

        .process-section .section-title {
            color: #fff;
        }

        .process-section .section-desc {
            color: rgba(255, 255, 255, 0.8);
        }

        .process-step {
            display: flex;
            gap: 1.5rem;
            padding: 1.5rem 0;
            border-bottom: 2px dashed rgba(255, 255, 255, 0.18);
            position: relative;
        }

        .process-step:last-child {
            border-bottom: none;
        }

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 1.125rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .step-content h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: #fff;
        }

        .step-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9375rem;
            margin-bottom: 0;
        }

        .faq-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-card .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 1.125rem 1.25rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            cursor: pointer;
            transition: background var(--transition);
        }

        .faq-card .faq-question:hover {
            background: var(--bg);
        }

        .faq-card .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.25rem;
            transition: transform 0.25s ease;
        }

        .faq-card.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-card .faq-answer {
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease;
        }

        .faq-card.open .faq-answer {
            max-height: 300px;
        }

        .faq-card .faq-answer-inner {
            padding: 0 1.25rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        .cta-section {
            background: var(--primary-deep);
            color: #fff;
            padding: 4.5rem 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 2.5vw, 2.125rem);
            font-weight: 700;
            margin-bottom: 0.875rem;
        }

        .cta-section .cta-subtitle {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            margin-bottom: 2rem;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .site-footer {
            background: #16283B;
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
            margin-top: auto;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.125rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .site-footer .brand-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .site-footer .footer-desc {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 0;
        }

        .site-footer .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

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

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

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.875rem;
            transition: color var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: #fff;
        }

        .site-footer .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 0.75rem;
        }

        .site-footer .footer-contact-item i {
            color: var(--primary);
            font-size: 1rem;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 2.5rem;
            padding: 1.25rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.55);
        }

        .site-footer .footer-domain {
            color: rgba(255, 255, 255, 0.45);
        }

        .offcanvas-backdrop-custom {
            display: none;
        }

        .offcanvas-custom {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            max-width: 80vw;
            height: 100vh;
            background: #fff;
            z-index: 1045;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            box-shadow: 0 0 30px rgba(15, 23, 42, 0.2);
            display: flex;
            flex-direction: column;
        }

        .offcanvas-custom.show {
            transform: translateX(0);
        }

        .offcanvas-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.5);
            z-index: 1040;
            display: none;
        }

        .offcanvas-backdrop.show {
            display: block;
        }

        .offcanvas-custom .brand {
            border-bottom: 1px solid var(--border);
        }

        .offcanvas-custom .sidebar-nav {
            flex: 1;
            margin-top: 0.5rem;
        }

        .offcanvas-custom .sidebar-contact {
            border-top: 1px solid var(--border);
        }

        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }
            .main-content {
                margin-left: 0;
            }
            .topbar {
                display: flex;
            }
            .section-block {
                padding: 3rem 0;
            }
            .hero-category {
                padding: 3.5rem 0;
            }
        }

        @media (max-width: 767.98px) {
            .container-page {
                padding: 0 1.25rem;
            }
            .content-list-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 1rem;
            }
            .content-list-card .thumb-wrap {
                width: 100%;
                height: 180px;
                margin-bottom: 1rem;
            }
            .content-list-card .card-body {
                padding: 0;
            }
            .content-list-card .card-title {
                white-space: normal;
            }
            .process-step {
                gap: 1rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .container-page {
                padding: 0 1rem;
            }
            .btn {
                width: 100%;
            }
            .hero-category h1 {
                font-size: 1.875rem;
            }
        }

        .row {
            --bs-gutter-y: 1.5rem;
        }

        .empty-state {
            display: none;
            text-align: center;
            padding: 3rem 1rem;
            background: #fff;
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            color: var(--text-muted);
        }

        .empty-state .empty-icon {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
        }

        .empty-state h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .empty-state p {
            font-size: 0.875rem;
            margin-bottom: 0;
        }

/* roulang page: article */
:root {
            --color-primary: #2B5E9E;
            --color-primary-deep: #1B3F6B;
            --color-primary-light: #EAF1F8;
            --color-accent: #F2784B;
            --color-accent-hover: #E0663B;
            --color-data-accent: #1FA97C;
            --color-bg: #F4F7FA;
            --color-card: #FFFFFF;
            --color-testimonial-bg: #FBF3EF;
            --color-text: #1E2A38;
            --color-text-secondary: #5E6E7E;
            --color-text-muted: #9AA8B6;
            --color-border: #E2E8F0;
            --color-footer-bg: #16283B;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-image: 18px;
            --radius-badge: 20px;
            --shadow-card: 0 4px 20px rgba(30,42,56,0.08);
            --shadow-card-hover: 0 8px 28px rgba(30,42,56,0.14);
            --transition: 0.2s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--color-primary-deep);
        }

        button, input, select, textarea {
            font-family: inherit;
        }

        a:focus-visible, button:focus-visible {
            outline: 3px solid rgba(43, 94, 158, 0.25);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .app-shell {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .app-sidebar {
            width: 220px;
            height: 100vh;
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1030;
            background: var(--color-card);
            border-right: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
        }

        .sidebar-brand {
            height: 64px;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0 1.25rem;
            border-bottom: 1px solid var(--color-border);
            flex-shrink: 0;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            white-space: nowrap;
        }

        .sidebar-nav {
            flex: 1;
            padding: 0.75rem 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            height: 46px;
            padding: 0 1.25rem;
            color: var(--color-text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            border-left: 3px solid transparent;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-item:hover {
            background: var(--color-bg);
            color: var(--color-primary);
        }

        .nav-item.active {
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-left-color: var(--color-primary);
            font-weight: 600;
        }

        .nav-icon {
            font-size: 1.1rem;
            line-height: 1;
        }

        .sidebar-contact {
            padding: 1rem 1.25rem;
            border-top: 1px solid var(--color-border);
            color: var(--color-text-muted);
            font-size: 0.8125rem;
            flex-shrink: 0;
        }

        .contact-line {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.375rem;
        }

        .app-main {
            margin-left: 220px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--color-bg);
        }

        .page-main {
            flex: 1;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 3rem 2rem;
        }

        .article-wrap {
            max-width: 720px;
            margin: 0 auto;
        }

        .article-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2.5rem;
            margin-bottom: 2rem;
            border: 1px solid transparent;
        }

        .article-breadcrumb {
            margin-bottom: 1.5rem;
        }

        .article-breadcrumb .breadcrumb {
            margin-bottom: 0;
            flex-wrap: wrap;
        }

        .article-breadcrumb .breadcrumb-item a {
            color: var(--color-primary);
            font-weight: 500;
        }

        .article-breadcrumb .breadcrumb-item a:hover {
            color: var(--color-primary-deep);
        }

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

        .article-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
            color: var(--color-border);
        }

        .article-title {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 1rem;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.25rem;
            color: var(--color-text-muted);
            font-size: 0.875rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 2rem;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
        }

        .article-meta i {
            color: var(--color-primary);
        }

        .article-content {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--color-text);
        }

        .article-content p {
            margin-bottom: 1.25rem;
        }

        .article-content h2,
        .article-content h3 {
            font-weight: 600;
            color: var(--color-text);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 1.5rem;
        }

        .article-content h3 {
            font-size: 1.25rem;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-card);
            margin: 1.25rem 0;
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-primary-light);
            padding: 1rem 1.25rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
            color: var(--color-text-secondary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.9375rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--color-border);
            padding: 0.75rem;
            text-align: left;
        }

        .article-content th {
            background: var(--color-primary-light);
            color: var(--color-text);
            font-weight: 600;
        }

        .article-content tr:nth-child(even) td {
            background: #F8FAFC;
        }

        .article-content a {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .article-content a:hover {
            color: var(--color-primary-deep);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--color-border);
        }

        .tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-badge);
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 500;
        }

        .related-section {
            margin-top: 2.5rem;
        }

        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.25rem;
            gap: 1rem;
        }

        .section-heading h2 {
            font-size: clamp(1.375rem, 2.2vw, 1.75rem);
            font-weight: 600;
            color: var(--color-text);
            margin: 0;
        }

        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            color: var(--color-primary);
            font-weight: 500;
            font-size: 0.9375rem;
        }

        .more-link:hover {
            color: var(--color-primary-deep);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }

        .related-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1rem;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .related-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .related-card img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .related-card-body {
            min-width: 0;
        }

        .related-card-body h3 {
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
            color: var(--color-text);
            transition: color var(--transition);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .related-card:hover .related-card-body h3 {
            color: var(--color-primary);
        }

        .related-card-body span {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        .article-faq {
            margin-top: 2.5rem;
        }

        .article-faq .accordion-item {
            background: var(--color-card);
            border: 1px solid transparent;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .article-faq .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 1rem 1.25rem;
            box-shadow: none;
            border: none;
            transition: color var(--transition);
        }

        .article-faq .accordion-button::after {
            transition: transform var(--transition);
        }

        .article-faq .accordion-button:not(.collapsed) {
            color: var(--color-primary);
            border-bottom: 1px solid var(--color-border);
        }

        .article-faq .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .article-faq .accordion-body {
            background: var(--color-card);
            padding: 1.25rem;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        .cta-section {
            background: var(--color-primary-deep);
            border-radius: var(--radius-image);
            padding: 3rem 2rem;
            text-align: center;
            margin-top: 2.5rem;
            color: #fff;
        }

        .cta-section h2 {
            font-size: clamp(1.375rem, 2.5vw, 2rem);
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #fff;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 1.5rem;
        }

        .cta-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--color-accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            min-width: 140px;
            transition: all var(--transition);
        }

        .cta-button:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .cta-button:active {
            transform: scale(0.98);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.75rem 1.5rem;
            font-weight: 500;
            font-size: 1rem;
            min-width: 140px;
            transition: all var(--transition);
        }

        .btn-primary:hover {
            background: #24507F;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .not-found-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            max-width: 560px;
            margin: 3rem auto;
            padding: 3rem 2rem;
            text-align: center;
            border: 1px solid var(--color-border);
        }

        .not-found-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.25rem;
            background: var(--color-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.75rem;
            color: var(--color-text-muted);
        }

        .not-found-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.5rem;
        }

        .not-found-card p {
            color: var(--color-text-secondary);
            margin-bottom: 1.5rem;
        }

        .site-footer {
            background: var(--color-footer-bg);
            color: rgba(255, 255, 255, 0.75);
            padding-top: 3rem;
            width: 100%;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: #fff;
            font-size: 1.125rem;
            font-weight: 700;
        }

        .footer-brand .brand-logo {
            background: var(--color-accent);
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            margin-top: 1rem;
            max-width: 360px;
            line-height: 1.7;
        }

        .footer-title {
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            margin-bottom: 0.625rem;
        }

        .footer-contact-item i {
            color: var(--color-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.25rem 0;
            margin-top: 2.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom .footer-domain {
            color: rgba(255, 255, 255, 0.6);
        }

        .mobile-header {
            display: none;
            height: 56px;
            background: var(--color-card);
            border-bottom: 1px solid var(--color-border);
            align-items: center;
            justify-content: space-between;
            padding: 0 1rem;
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 2px 12px rgba(30, 42, 56, 0.06);
        }

        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            border-radius: 8px;
            font-size: 1.5rem;
            color: var(--color-text);
            transition: background var(--transition);
        }

        .mobile-menu-btn:hover {
            background: var(--color-primary-light);
        }

        .mobile-brand {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--color-text);
        }

        .mobile-contact-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-radius: 8px;
            font-size: 1rem;
            transition: all var(--transition);
        }

        .mobile-contact-btn:hover {
            background: var(--color-primary);
            color: #fff;
        }

        .offcanvas.mobile-drawer {
            width: 280px;
            background: var(--color-card);
            border-right: 1px solid var(--color-border);
        }

        .drawer-header {
            height: 64px;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0 1.25rem;
            border-bottom: 1px solid var(--color-border);
            flex-shrink: 0;
        }

        .drawer-header .btn-close {
            margin-left: auto;
            font-size: 0.875rem;
        }

        .drawer-body {
            display: flex;
            flex-direction: column;
            padding: 0;
            overflow-y: auto;
        }

        .drawer-body .sidebar-nav {
            flex: 1;
            padding: 0.75rem 0;
        }

        .drawer-contact {
            padding: 1rem 1.25rem;
            border-top: 1px solid var(--color-border);
            color: var(--color-text-muted);
            font-size: 0.8125rem;
        }

        .offcanvas-backdrop.show {
            background: rgba(15, 23, 42, 0.5);
        }

        @media (max-width: 991.98px) {
            .app-sidebar {
                display: none;
            }

            .app-main {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .page-main {
                padding: 2rem 1.25rem;
            }
        }

        @media (max-width: 767.98px) {
            .page-main {
                padding: 1.5rem 1rem;
            }

            .article-card {
                padding: 1.5rem;
            }

            .article-meta {
                gap: 0.75rem 1rem;
            }

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

            .cta-section {
                padding: 2.5rem 1.5rem;
                border-radius: var(--radius-card);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .article-title {
                font-size: 1.5rem;
            }

            .article-breadcrumb .breadcrumb-item {
                font-size: 0.8125rem;
            }

            .article-meta {
                font-size: 0.8125rem;
            }

            .section-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }

            .cta-section {
                padding: 2rem 1rem;
            }

            .cta-section h2 {
                font-size: 1.375rem;
            }
        }

        @media (min-width: 992px) and (max-width: 1199.98px) {
            .page-main {
                padding: 3rem 1.5rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B5E9E;
            --primary-deep: #1B3F6B;
            --primary-light: #EAF1F8;
            --accent: #F2784B;
            --accent-hover: #E0663B;
            --data-green: #1FA97C;
            --page-bg: #F4F7FA;
            --card-bg: #FFFFFF;
            --warm-bg: #FBF3EF;
            --text: #1E2A38;
            --text-secondary: #5E6E7E;
            --text-muted: #9AA8B6;
            --border: #E2E8F0;
            --shadow-sm: 0 4px 20px rgba(30, 42, 56, 0.08);
            --shadow-hover: 0 8px 28px rgba(30, 42, 56, 0.14);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 18px;
            --radius-badge: 20px;
            --section-space: 5rem;
            --sidebar-w: 220px;
            --topbar-h: 56px;
            --ease: 0.2s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            color: var(--text);
            background: var(--page-bg);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
        }

        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.3;
        }

        p {
            margin: 0;
        }

        ul, ol {
            margin: 0;
            padding: 0;
        }

        /* ========== 左侧 App Shell 导航 ========== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-w);
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--border);
            z-index: 1030;
            display: flex;
            flex-direction: column;
            padding-bottom: 1rem;
        }

        .brand-wrap {
            height: 64px;
            display: flex;
            align-items: center;
            gap: .65rem;
            padding: 0 1rem;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.05rem;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .sidebar-nav {
            flex: 1;
            padding: 1rem .75rem;
            display: flex;
            flex-direction: column;
            gap: .25rem;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: .7rem;
            height: 44px;
            padding: 0 .85rem;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: .95rem;
            font-weight: 500;
            position: relative;
            transition: background var(--ease), color var(--ease);
        }

        .nav-item:hover {
            background: #F4F7FA;
            color: var(--text);
        }

        .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-item.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 3px;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
        }

        .nav-icon {
            font-size: 1.1rem;
        }

        .sidebar-contact {
            padding: 1rem;
            border-top: 1px solid var(--border);
            font-size: .8rem;
            color: var(--text-muted);
        }

        .sidebar-contact-item {
            display: flex;
            align-items: center;
            gap: .5rem;
            color: var(--text-secondary);
            font-size: .85rem;
            margin-bottom: .4rem;
        }

        .main-wrap {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
        }

        /* ========== 移动端顶栏与抽屉 ========== */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1020;
            height: var(--topbar-h);
            background: #fff;
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 1rem;
        }

        .mobile-topbar .brand-name {
            font-size: 1rem;
        }

        .icon-btn {
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: .25rem;
            line-height: 1;
        }

        .mobile-contact-btn {
            font-size: .8rem;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: 8px;
            padding: .3rem .75rem;
            background: #fff;
            transition: background var(--ease), color var(--ease);
        }

        .mobile-contact-btn:hover {
            background: var(--primary-light);
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 1040;
            transform: translateX(-100%);
            transition: transform .25s ease;
            display: flex;
            flex-direction: column;
            padding-bottom: 1rem;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-header {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 1rem;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .drawer-close {
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--text-muted);
        }

        .drawer-nav {
            padding: 1rem .75rem;
            display: flex;
            flex-direction: column;
            gap: .25rem;
            flex: 1;
        }

        .drawer-contact {
            padding: 1rem;
            border-top: 1px solid var(--border);
            font-size: .8rem;
            color: var(--text-muted);
        }

        .sidebar-scrim {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .5);
            z-index: 1035;
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s ease, visibility .25s ease;
        }

        .sidebar-scrim.show {
            opacity: 1;
            visibility: visible;
        }

        /* ========== Hero ========== */
        .category-hero {
            position: relative;
            background-color: var(--primary-deep);
            background-image: linear-gradient(rgba(27, 63, 107, .88), rgba(27, 63, 107, .94)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding: 5.5rem 0;
            overflow: hidden;
        }

        .hero-eyebrow {
            display: inline-block;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            color: #EAF1F8;
            padding: .3rem .8rem;
            border-radius: 20px;
            font-size: .8rem;
            letter-spacing: .02em;
            margin-bottom: 1.2rem;
        }

        .category-hero h1 {
            font-size: clamp(2rem, 4vw, 3.25rem);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 1rem;
        }

        .hero-sub {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
            max-width: 560px;
            margin-bottom: 2rem;
        }

        .hero-breadcrumb {
            font-size: .85rem;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 1.4rem;
        }

        .hero-breadcrumb a {
            color: rgba(255, 255, 255, .85);
            transition: color var(--ease);
        }

        .hero-breadcrumb a:hover {
            color: #fff;
        }

        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        /* ========== 按钮 ========== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            border-radius: 8px;
            padding: .75rem 1.5rem;
            min-width: 140px;
            font-size: .95rem;
            font-weight: 600;
            border: 0;
            transition: background var(--ease), transform var(--ease), box-shadow var(--ease), color var(--ease);
            cursor: pointer;
        }

        .btn-custom:focus-visible {
            outline: 3px solid rgba(43, 94, 158, .25);
            outline-offset: 2px;
        }

        .btn-custom:active {
            transform: scale(0.98);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
        }

        .btn-outline-custom {
            border: 1px solid rgba(255, 255, 255, .7);
            background: transparent;
            color: #fff;
        }

        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            border-color: #fff;
        }

        .btn-deep {
            background: #fff;
            color: var(--primary-deep);
        }

        .btn-deep:hover {
            background: #E8EEF4;
            color: var(--primary-deep);
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary-custom:hover {
            background: #24507F;
            color: #fff;
        }

        /* ========== 通用区块 ========== */
        .section {
            padding: var(--section-space) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-warm {
            background: var(--warm-bg);
        }

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

        .section-head .eyebrow {
            color: var(--primary);
            font-size: .85rem;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: .4rem;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: .6rem;
        }

        .section-head .section-sub {
            color: var(--text-secondary);
            max-width: 640px;
            font-size: 1rem;
        }

        .section-head.center {
            text-align: center;
        }

        .section-head.center .section-sub {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== 卡片 ========== */
        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            height: 100%;
            transition: box-shadow var(--ease), transform var(--ease);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .feature-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: .6rem;
        }

        .feature-card p {
            font-size: .9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .scene-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--ease), transform var(--ease);
        }

        .scene-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .scene-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }

        .scene-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: .5rem;
        }

        .scene-card p {
            font-size: .88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== 流程 ========== */
        .process-list {
            max-width: 760px;
        }

        .process-item {
            display: flex;
            gap: 1.5rem;
            position: relative;
            padding-bottom: 2rem;
        }

        .process-item:last-child {
            padding-bottom: 0;
        }

        .process-item:not(:last-child)::after {
            content: "";
            position: absolute;
            left: 27px;
            top: 64px;
            bottom: 16px;
            width: 2px;
            background: rgba(43, 94, 158, .2);
        }

        .process-num {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            font-weight: 700;
            position: relative;
            z-index: 1;
        }

        .process-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: .4rem;
        }

        .process-body p {
            color: var(--text-secondary);
            font-size: .92rem;
            max-width: 560px;
        }

        .process-img {
            margin-top: .8rem;
            border-radius: 12px;
            overflow: hidden;
            max-width: 180px;
        }

        .process-img img {
            width: 100%;
            height: 120px;
            object-fit: cover;
        }

        /* ========== 数据区 ========== */
        .stats-section {
            background: var(--primary-deep);
            color: #fff;
        }

        .stat-item {
            text-align: center;
            padding: 2rem 1rem;
            position: relative;
        }

        .stat-item + .stat-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 25%;
            bottom: 25%;
            width: 1px;
            background: rgba(255, 255, 255, .15);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .stat-unit {
            font-size: 1rem;
            color: rgba(255, 255, 255, .85);
            margin-left: .15rem;
        }

        .stat-label {
            margin-top: .4rem;
            color: rgba(255, 255, 255, .75);
            font-size: .9rem;
        }

        /* ========== 专题内容卡 ========== */
        .topic-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--ease), transform var(--ease);
        }

        .topic-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .topic-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--primary-light);
        }

        .topic-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .topic-card:hover .topic-img img {
            transform: scale(1.03);
        }

        .topic-body {
            padding: 20px;
        }

        .topic-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: .75rem;
            border-radius: 20px;
            padding: 2px 10px;
            margin-bottom: .7rem;
        }

        .topic-body h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: .5rem;
        }

        .topic-body p {
            font-size: .88rem;
            color: var(--text-secondary);
            margin-bottom: .9rem;
        }

        .topic-link {
            color: var(--primary);
            font-weight: 500;
            font-size: .88rem;
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            transition: color var(--ease);
        }

        .topic-link:hover {
            color: var(--primary-deep);
        }

        /* ========== FAQ ========== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--ease);
        }

        .faq-item:has(.faq-question[aria-expanded="true"]) {
            border-color: rgba(43, 94, 158, .25);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            background: none;
            border: 0;
            padding: 1rem 1.25rem;
            color: var(--text);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            cursor: pointer;
        }

        .faq-icon {
            color: var(--primary);
            font-size: 1.25rem;
            flex-shrink: 0;
            transition: transform .25s ease;
            line-height: 1;
        }

        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 1.25rem 1.1rem;
            color: var(--text-secondary);
            font-size: .92rem;
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--primary-deep);
            color: #fff;
            text-align: center;
            padding: 4.5rem 0;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            margin-bottom: .8rem;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .8);
            max-width: 620px;
            margin: 0 auto 1.8rem;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #16283B;
            color: rgba(255, 255, 255, .75);
            padding: 3.5rem 0 0;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: .6rem;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: .9rem;
        }

        .footer-brand .brand-logo {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }

        .footer-desc {
            font-size: .88rem;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
        }

        .footer-title {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: .55rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: .88rem;
            transition: color var(--ease);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: .6rem;
            margin-bottom: .6rem;
            font-size: .88rem;
            color: rgba(255, 255, 255, .65);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 2.5rem;
            padding: 1.25rem 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: .5rem;
            font-size: .82rem;
            color: rgba(255, 255, 255, .5);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 991.98px) {
            :root {
                --section-space: 3rem;
            }

            .app-sidebar {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-wrap {
                margin-left: 0;
            }

            .stat-item + .stat-item::before {
                display: none;
            }

            .category-hero {
                padding: 3.5rem 0;
            }
        }

        @media (max-width: 575.98px) {
            .btn-custom {
                width: 100%;
            }

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

            .stat-number {
                font-size: 2rem;
            }

            .process-item {
                gap: 1rem;
            }

            .process-num {
                width: 48px;
                height: 48px;
                border-radius: 14px;
                font-size: 1rem;
            }

            .process-item:not(:last-child)::after {
                left: 23px;
            }

            .faq-question {
                font-size: .95rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }