/* roulang page: index */
:root {
            --primary: #0a1f44;
            --primary-light: #132d5e;
            --accent: #f5a623;
            --accent-dark: #d4891a;
            --surface: #ffffff;
            --bg-light: #f4f6f9;
            --text-main: #1e2a3a;
            --text-soft: #5a6a7e;
            --border: #dee2e8;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
            --radius: 10px;
            --radius-lg: 16px;
            --transition: 0.2s ease;
            --sidebar-width: 260px;
        }
        * { box-sizing: border-box; }
        body {
            margin: 0;
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { opacity: 0.85; }

        /* off-canvas 左侧栏 */
        .off-canvas.position-left {
            background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            padding: 2rem 1.5rem;
            width: var(--sidebar-width);
            border-right: 1px solid rgba(255,255,255,0.08);
        }
        .off-canvas.position-left .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 2.5rem;
            display: block;
            letter-spacing: 1px;
        }
        .off-canvas.position-left .logo:hover { color: var(--accent); }
        .off-canvas.position-left .sidebar-nav {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .off-canvas.position-left .sidebar-nav li {
            margin-bottom: 0.8rem;
        }
        .off-canvas.position-left .sidebar-nav a {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            font-weight: 500;
            display: block;
            padding: 0.6rem 0.8rem;
            border-radius: 8px;
            transition: var(--transition);
        }
        .off-canvas.position-left .sidebar-nav a:hover,
        .off-canvas.position-left .sidebar-nav a.active {
            background: rgba(255,255,255,0.12);
            color: #fff;
            padding-left: 1rem;
        }
        .off-canvas.position-left .sidebar-nav a.active {
            border-left: 3px solid var(--accent);
            background: rgba(255,255,255,0.15);
            font-weight: 600;
        }

        /* 主内容区 */
        .off-canvas-content {
            background: var(--bg-light);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* 移动端顶部栏 */
        .mobile-top-bar {
            background: var(--primary);
            color: #fff;
            padding: 0.8rem 1.2rem;
            display: none;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 20;
        }
        .mobile-top-bar .menu-icon {
            font-size: 1.6rem;
            cursor: pointer;
            background: none;
            border: none;
            color: #fff;
            padding: 0.2rem;
        }
        .mobile-top-bar .brand-mobile {
            font-weight: 700;
            font-size: 1.2rem;
        }

        @media screen and (max-width: 767px) {
            .mobile-top-bar { display: flex; }
            .off-canvas.position-left {
                width: 85vw;
            }
        }

        /* Hero */
        .hero {
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
            padding: 6rem 2rem;
            color: #fff;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,31,68,0.85) 0%, rgba(19,45,94,0.75) 100%);
            z-index: 1;
        }
        .hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 1.2rem;
            letter-spacing: 1px;
        }
        .hero .subhead {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-accent {
            display: inline-block;
            background: var(--accent);
            color: #0a1f44;
            font-weight: 700;
            padding: 0.85rem 2.2rem;
            border-radius: 40px;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: 0 8px 20px rgba(245,166,35,0.35);
            border: none;
            cursor: pointer;
            font-size: 1.05rem;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: 0 10px 25px rgba(245,166,35,0.5);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            display: inline-block;
            background: transparent;
            border: 2px solid #fff;
            color: #fff;
            font-weight: 600;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            text-decoration: none;
            margin-left: 1rem;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: #fff;
            color: var(--primary);
        }

        /* 板块通用 */
        .section-padding {
            padding: 4rem 1.5rem;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 1.8rem;
        }
        .section-lead {
            text-align: center;
            color: var(--text-soft);
            max-width: 680px;
            margin: 0 auto 2.5rem;
        }

        /* 图标矩阵 */
        .feature-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.8rem;
            justify-content: center;
        }
        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            text-align: center;
            flex: 1 1 220px;
            max-width: 280px;
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-card i {
            font-size: 2.6rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        /* 封面卡片网格 */
        .cover-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.6rem;
            justify-content: center;
        }
        .cover-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            flex: 1 1 280px;
            max-width: 360px;
            transition: var(--transition);
        }
        .cover-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .cover-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .cover-card .card-body {
            padding: 1.3rem;
        }
        .cover-card h4 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        .cover-card p {
            color: var(--text-soft);
            margin-bottom: 1rem;
        }

        /* 统计数字 */
        .stat-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
        }
        .stat-item {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            min-width: 150px;
            flex: 1 1 150px;
        }
        .stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
        }
        .stat-item .label {
            color: var(--text-soft);
            font-weight: 500;
        }

        /* CMS 列表 */
        .post-list {
            list-style: none;
            margin: 0;
            padding: 0;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .post-list li {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 1.2rem 1.5rem;
            margin-bottom: 1rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .post-list li:hover { box-shadow: var(--shadow-md); }
        .post-list .post-date {
            font-size: 0.9rem;
            color: var(--text-soft);
            min-width: 80px;
        }
        .post-list a {
            font-weight: 600;
            color: var(--primary);
        }
        .post-list .post-summary {
            color: var(--text-soft);
            margin-left: auto;
        }
        .no-posts {
            text-align: center;
            color: var(--text-soft);
            padding: 2rem;
        }

        /* FAQ Accordion */
        .faq-accordion .accordion-title {
            font-weight: 600;
            font-size: 1.1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1rem 1.4rem;
            margin-bottom: 0.5rem;
            transition: var(--transition);
        }
        .faq-accordion .accordion-title:hover {
            background: var(--bg-light);
        }

        /* CTA 区域 */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary) 0%, #0d2b55 100%);
            color: #fff;
            text-align: center;
            padding: 3rem 2rem;
            border-radius: var(--radius-lg);
            margin: 0 auto;
            max-width: 900px;
        }
        .cta-banner h2 {
            font-weight: 800;
            margin-bottom: 1rem;
        }

        /* 页脚 */
        .site-footer {
            background: var(--primary);
            color: rgba(255,255,255,0.7);
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .site-footer a {
            color: var(--accent);
            margin: 0 0.5rem;
        }

        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.2rem; }
            .btn-outline-light { display: block; margin: 0.8rem 0 0 0; }
        }

        /* 桌面端隐藏 off-canvas 触发按钮 */
        .off-canvas.position-left.reveal-for-large { display: block; }
        @media screen and (max-width: 767px) {
            .off-canvas.position-left.reveal-for-large { display: none; }
        }

/* roulang page: article */
:root {
            --primary: #1a3c5e;
            --primary-light: #1f4d7a;
            --primary-dark: #0f2a45;
            --accent: #d4942b;
            --accent-light: #e8b44f;
            --accent-dark: #b87a1f;
            --bg-white: #ffffff;
            --bg-light: #f7f8fa;
            --bg-cream: #fdf9f3;
            --bg-dark: #0d1f32;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a5e;
            --text-muted: #7a7a8e;
            --text-light: #9a9aae;
            --text-on-dark: #e8ecf1;
            --text-on-primary: #ffffff;
            --border-light: #e2e4e9;
            --border-medium: #d0d3da;
            --border-strong: #b0b4be;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 28px rgba(0,0,0,0.12), 0 4px 10px rgba(0,0,0,0.06);
            --shadow-xl: 0 20px 40px rgba(0,0,0,0.16), 0 6px 14px rgba(0,0,0,0.08);
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-pill: 50px;
            --sidebar-width: 252px;
            --sidebar-width-tablet: 220px;
            --topbar-height: 58px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
            --content-max-width: 780px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* Off-Canvas Wrapper */
        .off-canvas-wrapper {
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }

        /* Sidebar Navigation */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: linear-gradient(175deg, #0f1f35 0%, #152a48 40%, #0d1b2d 100%);
            color: var(--text-on-dark);
            z-index: 100;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            box-shadow: 2px 0 24px rgba(0,0,0,0.25);
            border-right: 1px solid rgba(255,255,255,0.06);
            transition: transform var(--transition-base);
            transform: translateX(0);
        }
        .sidebar-nav::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar-nav::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar-nav::-webkit-scrollbar-thumb {
            background: rgba(255,255,255,0.12);
            border-radius: 4px;
        }

        .sidebar-logo-wrap {
            padding: 22px 20px 18px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            flex-shrink: 0;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: #ffffff;
            text-decoration: none;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .sidebar-logo:hover {
            opacity: 0.88;
            color: #ffffff;
        }
        .sidebar-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(212,148,43,0.35);
        }

        .sidebar-nav-list {
            list-style: none;
            padding: 12px 10px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.82);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav-list li a:hover {
            background: rgba(255,255,255,0.08);
            color: #ffffff;
        }
        .sidebar-nav-list li a.active {
            background: rgba(255,255,255,0.13);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
            border-radius: var(--radius-sm);
        }
        .sidebar-nav-list li a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.7;
            flex-shrink: 0;
        }
        .sidebar-nav-list li a.active .nav-icon {
            opacity: 1;
            color: var(--accent-light);
        }

        .sidebar-footer-note {
            padding: 14px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.4);
            flex-shrink: 0;
            letter-spacing: 0.02em;
        }

        /* Off-Canvas Content */
        .off-canvas-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition-base), transform var(--transition-base);
            background: var(--bg-light);
        }

        /* Mobile Top Bar */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: linear-gradient(135deg, #0f1f35 0%, #152a48 100%);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: var(--shadow-md);
        }
        .mobile-topbar-logo {
            font-size: 1.05rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            text-decoration: none;
            white-space: nowrap;
        }
        .mobile-topbar-logo:hover {
            color: #ffffff;
            opacity: 0.9;
        }
        .hamburger-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.1);
            border: none;
            color: #ffffff;
            font-size: 1.3rem;
            transition: background var(--transition-fast);
        }
        .hamburger-btn:hover {
            background: rgba(255,255,255,0.18);
        }
        .hamburger-btn:active {
            background: rgba(255,255,255,0.25);
        }

        /* Overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.55);
            z-index: 98;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .sidebar-overlay.active {
            display: block;
            opacity: 1;
        }

        /* Main Content Area */
        .main-content {
            flex: 1;
            padding: 0;
        }

        /* Article Header Section */
        .article-header-section {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 0;
        }
        .article-header-inner {
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 32px 28px 20px;
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
            font-weight: 500;
        }
        .breadcrumb-nav a:hover {
            color: var(--accent-dark);
        }
        .breadcrumb-sep {
            color: var(--text-light);
            font-size: 0.7rem;
            margin: 0 2px;
        }
        .breadcrumb-current {
            color: var(--text-primary);
            font-weight: 600;
            pointer-events: none;
        }

        /* Article Title */
        .article-title {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        /* Article Meta */
        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta-item i {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .article-category-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: var(--bg-cream);
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 0.8rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            border: 1px solid rgba(212,148,43,0.25);
            white-space: nowrap;
        }
        .article-category-tag:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        /* Article Cover Image */
        .article-cover-wrap {
            max-width: var(--content-max-width);
            margin: 0 auto 0;
            padding: 0 28px 8px;
        }
        .article-cover-img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--bg-light);
        }

        /* Article Body */
        .article-body-section {
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 16px 28px 40px;
        }
        .article-content {
            font-size: 1.02rem;
            line-height: 1.85;
            color: var(--text-primary);
            word-wrap: break-word;
        }
        .article-content h2 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 32px 0 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            letter-spacing: 0.01em;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 650;
            color: var(--text-primary);
            margin: 24px 0 10px;
        }
        .article-content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin: 18px 0 8px;
        }
        .article-content p {
            margin-bottom: 16px;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 18px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content ul,
        .article-content ol {
            margin: 12px 0 16px 20px;
            padding-left: 8px;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-cream);
            padding: 14px 20px;
            margin: 18px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content code {
            background: #f0f2f5;
            padding: 2px 7px;
            border-radius: var(--radius-xs);
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: #c0392b;
        }
        .article-content pre {
            background: #1e1e2e;
            color: #e0e0e0;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 16px 0;
            font-size: 0.9rem;
            line-height: 1.6;
            font-family: var(--font-mono);
        }
        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 16px 0;
            font-size: 0.9rem;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border-light);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content table th {
            background: var(--bg-light);
            font-weight: 600;
        }
        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--accent-dark);
        }

        /* Article Footer Nav */
        .article-footer-nav {
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 0 28px 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: var(--bg-white);
            color: var(--text-primary);
            border: 1px solid var(--border-medium);
            font-weight: 500;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .btn-back:hover {
            background: var(--bg-light);
            border-color: var(--border-strong);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .btn-back i {
            font-size: 0.8rem;
        }

        /* Not Found State */
        .not-found-section {
            max-width: var(--content-max-width);
            margin: 0 auto;
            padding: 60px 28px 50px;
            text-align: center;
        }
        .not-found-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 48px 30px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }
        .not-found-icon {
            font-size: 3.5rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .not-found-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .not-found-desc {
            color: var(--text-muted);
            margin-bottom: 22px;
            font-size: 0.95rem;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 11px 24px;
            border-radius: var(--radius-pill);
            background: var(--accent);
            color: #fff;
            border: none;
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition-base);
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(212,148,43,0.3);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: 0 4px 16px rgba(184,122,31,0.4);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 1px 4px rgba(184,122,31,0.3);
        }

        /* CTA Banner */
        .cta-banner {
            max-width: var(--content-max-width);
            margin: 0 auto 40px;
            padding: 0 28px;
        }
        .cta-banner-inner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            color: var(--text-on-dark);
            text-align: center;
            box-shadow: var(--shadow-lg);
        }
        .cta-banner-inner h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #fff;
        }
        .cta-banner-inner p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.78);
            margin-bottom: 14px;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: var(--radius-pill);
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.5);
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            text-align: center;
            padding: 28px 20px;
            font-size: 0.85rem;
            line-height: 1.8;
            flex-shrink: 0;
            margin-top: auto;
        }
        .site-footer a {
            color: rgba(255,255,255,0.75);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--accent-light);
        }
        .site-footer p {
            margin: 0;
        }
        .site-footer p + p {
            margin-top: 6px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: var(--sidebar-width-tablet);
                --content-max-width: 700px;
            }
            .article-title {
                font-size: 1.65rem;
            }
            .article-header-inner {
                padding: 24px 20px 14px;
            }
            .article-body-section {
                padding: 12px 20px 32px;
            }
            .article-cover-wrap {
                padding: 0 20px 6px;
            }
            .article-footer-nav {
                padding: 0 20px 14px;
            }
            .not-found-section {
                padding: 40px 20px 36px;
            }
            .cta-banner {
                padding: 0 20px;
            }
        }

        @media (max-width: 768px) {
            .sidebar-nav {
                transform: translateX(-100%);
                width: 260px;
                z-index: 101;
                box-shadow: 4px 0 30px rgba(0,0,0,0.4);
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .off-canvas-content {
                margin-left: 0 !important;
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-overlay.active {
                display: block;
                opacity: 1;
            }
            .main-content {
                padding-top: var(--topbar-height);
            }
            :root {
                --content-max-width: 100%;
            }
            .article-title {
                font-size: 1.4rem;
            }
            .article-header-inner {
                padding: 20px 14px 12px;
            }
            .article-body-section {
                padding: 10px 14px 28px;
            }
            .article-cover-wrap {
                padding: 0 14px 4px;
            }
            .article-content {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-content h2 {
                font-size: 1.25rem;
                margin: 24px 0 10px;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .breadcrumb-nav {
                font-size: 0.78rem;
                margin-bottom: 14px;
            }
            .article-meta-row {
                font-size: 0.8rem;
                gap: 10px;
            }
            .not-found-card {
                padding: 32px 18px;
            }
            .not-found-icon {
                font-size: 2.8rem;
            }
            .not-found-title {
                font-size: 1.25rem;
            }
            .cta-banner-inner {
                padding: 20px 18px;
            }
            .site-footer {
                padding: 20px 14px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.2rem;
            }
            .article-header-inner {
                padding: 16px 10px 10px;
            }
            .article-body-section {
                padding: 8px 10px 24px;
            }
            .article-cover-wrap {
                padding: 0 10px 2px;
            }
            .article-cover-img {
                border-radius: var(--radius-md);
            }
            .article-meta-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .article-footer-nav {
                padding: 0 10px 12px;
                justify-content: center;
            }
            .btn-back {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .breadcrumb-nav {
                font-size: 0.75rem;
            }
            .cta-banner {
                padding: 0 10px;
                margin-bottom: 28px;
            }
            .not-found-section {
                padding: 30px 10px 28px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0a1f3f;
            --color-primary-light: #132d56;
            --color-accent: #d4a853;
            --color-accent-hover: #c4963d;
            --color-accent-light: #f5ecd7;
            --color-highlight: #1e6fd9;
            --color-bg: #f7f8fc;
            --color-white: #ffffff;
            --color-text: #1a1a2e;
            --color-text-weak: #6b7280;
            --color-text-muted: #9ca3af;
            --color-border: #e2e8f0;
            --color-border-light: #f0f2f5;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --color-card-shadow: rgba(10, 31, 63, 0.06);
            --color-card-shadow-hover: rgba(10, 31, 63, 0.14);
            --color-overlay: rgba(10, 31, 63, 0.55);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(10, 31, 63, 0.06);
            --shadow-md: 0 4px 14px rgba(10, 31, 63, 0.08);
            --shadow-lg: 0 10px 32px rgba(10, 31, 63, 0.11);
            --shadow-xl: 0 18px 48px rgba(10, 31, 63, 0.15);
            --sidebar-width: 260px;
            --sidebar-bg: #0a1f3f;
            --sidebar-text: #c8d6e5;
            --sidebar-active-bg: rgba(212, 168, 83, 0.13);
            --sidebar-active-text: #d4a853;
            --sidebar-hover-bg: rgba(255, 255, 255, 0.05);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --font-heading: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--color-highlight);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 3px;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            color: var(--color-primary);
            margin-top: 0;
            line-height: 1.3;
        }
        h1 { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; font-weight: 700; letter-spacing: -0.01em; }
        h3 { font-size: 1.45rem; font-weight: 700; }
        h4 { font-size: 1.2rem; font-weight: 600; }

        .app-layout {
            display: flex;
            min-height: 100vh;
            position: relative;
        }

        /* Sidebar Navigation */
        .app-sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            background: var(--sidebar-bg);
            color: var(--sidebar-text);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition-slow);
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.18);
        }
        .app-sidebar .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 22px 24px 18px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            text-decoration: none;
            color: #fff;
            transition: opacity var(--transition-fast);
        }
        .app-sidebar .sidebar-brand:hover {
            opacity: 0.85;
        }
        .app-sidebar .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .app-sidebar .sidebar-brand .brand-text {
            font-size: 1.05rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            white-space: nowrap;
            font-family: var(--font-heading);
        }
        .app-sidebar .sidebar-nav {
            list-style: none;
            margin: 0;
            padding: 16px 12px;
            flex: 1;
        }
        .app-sidebar .sidebar-nav li {
            margin-bottom: 4px;
        }
        .app-sidebar .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 11px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--sidebar-text);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.98rem;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.01em;
        }
        .app-sidebar .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }
        .app-sidebar .sidebar-nav a:hover {
            background: var(--sidebar-hover-bg);
            color: #fff;
        }
        .app-sidebar .sidebar-nav a:hover i {
            opacity: 1;
        }
        .app-sidebar .sidebar-nav a.active {
            background: var(--sidebar-active-bg);
            color: var(--sidebar-active-text);
            font-weight: 700;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }
        .app-sidebar .sidebar-nav a.active i {
            opacity: 1;
            color: var(--sidebar-active-text);
        }
        .app-sidebar .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
            letter-spacing: 0.02em;
        }

        /* Overlay for mobile */
        .app-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--color-overlay);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-normal);
        }
        .app-overlay.active {
            display: block;
            opacity: 1;
        }

        /* Main Content */
        .app-main {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--color-bg);
            transition: margin-left var(--transition-slow);
        }

        /* Mobile Toggle Button */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 14px;
            left: 14px;
            z-index: 1100;
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            width: 42px;
            height: 42px;
            font-size: 1.3rem;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .mobile-toggle:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-lg);
        }
        .mobile-toggle:active {
            transform: scale(0.95);
        }

        /* Hero Section */
        .hero-category {
            position: relative;
            background: linear-gradient(160deg, #091931 0%, #0f2847 40%, #132d56 100%);
            color: #fff;
            padding: 70px 0 80px;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .hero-category .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-category .hero-content {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .hero-category .hero-text {
            flex: 1;
            min-width: 280px;
        }
        .hero-category .hero-badge {
            display: inline-block;
            background: rgba(212, 168, 83, 0.18);
            color: var(--color-accent);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
            border: 1px solid rgba(212, 168, 83, 0.25);
        }
        .hero-category h1 {
            color: #fff;
            font-size: 2.8rem;
            margin-bottom: 14px;
            line-height: 1.2;
        }
        .hero-category .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 540px;
        }
        .hero-category .hero-image-wrap {
            flex: 0 0 340px;
            min-width: 260px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            border: 2px solid rgba(255, 255, 255, 0.12);
        }
        .hero-category .hero-image-wrap img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-normal);
            border: none;
            cursor: pointer;
            text-decoration: none;
            font-family: var(--font-body);
            line-height: 1.4;
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-primary);
            box-shadow: 0 4px 14px rgba(212, 168, 83, 0.35);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            color: var(--color-primary);
            box-shadow: 0 7px 22px rgba(212, 168, 83, 0.5);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(212, 168, 83, 0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 1.08rem;
            border-radius: var(--radius-lg);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
        }

        /* Section Spacing */
        .section {
            padding: 64px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header h2 {
            margin-bottom: 10px;
            color: var(--color-primary);
        }
        .section-header .section-lead {
            color: var(--color-text-weak);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Feature Cards */
        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            border: 1px solid var(--color-border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
            border-color: var(--color-accent);
        }
        .feature-card .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-accent);
            margin-bottom: 18px;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .feature-card:hover .feature-icon {
            background: var(--color-accent);
            color: #fff;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .feature-card p {
            color: var(--color-text-weak);
            margin: 0;
            font-size: 0.95rem;
            line-height: 1.65;
            flex: 1;
        }

        /* Stats Row */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
        }
        .stat-item {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            flex: 1;
            min-width: 150px;
            max-width: 220px;
            transition: all var(--transition-normal);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1;
            margin-bottom: 6px;
            font-family: var(--font-heading);
        }
        .stat-item .stat-label {
            color: var(--color-text-weak);
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* Scenario Cards */
        .scenario-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            height: 100%;
            text-align: center;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .scenario-card .scenario-icon {
            font-size: 2.6rem;
            color: var(--color-accent);
            margin-bottom: 14px;
            display: block;
        }
        .scenario-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .scenario-card p {
            color: var(--color-text-weak);
            font-size: 0.93rem;
            margin: 0;
            line-height: 1.6;
        }

        /* Process Steps */
        .process-step {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .process-step:last-child {
            border-bottom: none;
        }
        .process-step .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-accent);
            color: var(--color-primary);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-normal);
        }
        .process-step:hover .step-number {
            transform: scale(1.1);
            box-shadow: 0 6px 18px rgba(212, 168, 83, 0.45);
        }
        .process-step .step-content h4 {
            margin-bottom: 4px;
            color: var(--color-primary);
            font-size: 1.1rem;
        }
        .process-step .step-content p {
            color: var(--color-text-weak);
            margin: 0;
            font-size: 0.93rem;
        }

        /* FAQ Accordion */
        .faq-section .accordion {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .faq-section .accordion-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-section .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-section .accordion-title {
            display: block;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-primary);
            cursor: pointer;
            text-decoration: none;
            position: relative;
            transition: all var(--transition-fast);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            font-family: var(--font-body);
        }
        .faq-section .accordion-title::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-muted);
            transition: transform var(--transition-normal);
            font-size: 1.1rem;
        }
        .faq-section .accordion-item.is-active .accordion-title::after {
            transform: translateY(-50%) rotate(180deg);
            color: var(--color-accent);
        }
        .faq-section .accordion-item.is-active .accordion-title {
            color: var(--color-accent);
        }
        .faq-section .accordion-content {
            padding: 0 22px 18px;
            color: var(--color-text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-section .accordion-item.is-active .accordion-content {
            display: block;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(145deg, #0a1f3f 0%, #132d56 60%, #1a3e6e 100%);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            border-radius: var(--radius-xl);
            margin: 0 0 40px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            margin-bottom: 26px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Site Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.7);
            text-align: center;
            padding: 30px 20px;
            margin-top: auto;
            font-size: 0.9rem;
            line-height: 2;
            letter-spacing: 0.02em;
        }
        .site-footer p {
            margin: 0;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
            transition: color var(--transition-fast);
            margin: 0 6px;
        }
        .site-footer a:hover {
            color: var(--color-accent);
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            :root {
                --sidebar-width: 240px;
            }
            .hero-category h1 {
                font-size: 2.2rem;
            }
            .hero-category .hero-image-wrap {
                flex: 0 0 260px;
                min-width: 200px;
            }
            .hero-category {
                padding: 50px 0 60px;
                min-height: auto;
            }
            .section {
                padding: 48px 0;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .stat-item {
                min-width: 120px;
                max-width: 160px;
                padding: 20px 16px;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
        }

        @media screen and (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
                width: 280px;
                min-width: 280px;
            }
            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 40px rgba(0, 0, 0, 0.4);
            }
            .app-overlay.active {
                display: block;
                opacity: 1;
            }
            .app-main {
                margin-left: 0;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero-category {
                padding: 40px 0 48px;
                text-align: center;
            }
            .hero-category .hero-content {
                flex-direction: column;
                gap: 28px;
            }
            .hero-category .hero-text {
                min-width: 100%;
                text-align: center;
            }
            .hero-category .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-category .hero-image-wrap {
                flex: 0 0 auto;
                width: 80%;
                max-width: 320px;
                min-width: auto;
                margin: 0 auto;
            }
            .hero-category h1 {
                font-size: 1.8rem;
            }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
            .section {
                padding: 40px 0;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .feature-card {
                margin-bottom: 12px;
            }
            .stats-row {
                gap: 12px;
            }
            .stat-item {
                min-width: 100px;
                max-width: 140px;
                padding: 16px 10px;
            }
            .stat-item .stat-number {
                font-size: 1.5rem;
            }
            .stat-item .stat-label {
                font-size: 0.78rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 40px 16px;
                border-radius: var(--radius-lg);
            }
            .btn-lg {
                padding: 12px 26px;
                font-size: 1rem;
            }
            .process-step {
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.5rem;
            }
            .hero-category .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-category .hero-image-wrap {
                width: 90%;
                max-width: 260px;
            }
            h1 { font-size: 1.5rem; }
            h2 { font-size: 1.3rem; }
            .stat-item {
                min-width: 70px;
                max-width: 100px;
                padding: 12px 6px;
            }
            .stat-item .stat-number {
                font-size: 1.3rem;
            }
            .stat-item .stat-label {
                font-size: 0.7rem;
            }
            .stats-row {
                gap: 8px;
                flex-wrap: wrap;
                justify-content: center;
            }
            .feature-card {
                padding: 20px 16px 18px;
            }
            .feature-card h3 {
                font-size: 1.05rem;
            }
            .feature-card p {
                font-size: 0.88rem;
            }
            .faq-section .accordion-title {
                font-size: 0.93rem;
                padding: 14px 16px;
                padding-right: 36px;
            }
            .faq-section .accordion-content {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.9rem;
            }
            .mobile-toggle {
                top: 10px;
                left: 10px;
                width: 36px;
                height: 36px;
                font-size: 1.1rem;
            }
        }