/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f1f5f9;
            --bg-alt: #e2e8f0;
            --surface: #ffffff;
            --surface-alt: #f8fafc;
            --dark: #0f172a;
            --dark-alt: #1e293b;
            --text: #1e293b;
            --text-soft: #475569;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --text-on-dark: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
            --shadow-md: 0 10px 25px rgba(0,0,0,0.10), 0 4px 10px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.14), 0 8px 20px rgba(0,0,0,0.10);
            --shadow-hover: 0 20px 40px rgba(0,0,0,0.12), 0 6px 14px rgba(0,0,0,0.09);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover { color: var(--primary-light); }
        a:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
        }

        ul, ol { list-style: none; }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: opacity var(--transition-fast);
        }
        .logo:hover {
            color: var(--primary-dark);
            opacity: 0.85;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: rgba(30,64,175,0.04);
        }
        .nav a.active {
            color: var(--primary);
            background: rgba(30,64,175,0.08);
            font-weight: 700;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .nav-cta {
            margin-left: 8px;
            padding: 10px 22px !important;
            background: var(--primary) !important;
            color: #fff !important;
            border-radius: var(--radius-full) !important;
            font-weight: 700 !important;
            transition: all var(--transition-fast) !important;
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #fff !important;
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }
        .nav-cta::after { display: none !important; }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            border-radius: 2px;
            background: var(--text);
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px,5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px,-5px);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            z-index: 999;
            padding: 20px 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: var(--radius);
            color: var(--text-soft);
            transition: all var(--transition-fast);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: rgba(30,64,175,0.06);
            color: var(--primary);
        }
        .mobile-nav a.mobile-cta {
            background: var(--primary);
            color: #fff !important;
            text-align: center;
            border-radius: var(--radius-full);
            margin-top: 8px;
            font-weight: 700;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 80px 0 100px;
            background: var(--dark);
            color: var(--text-on-dark);
            overflow: hidden;
            min-height: 580px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,23,42,0.65) 0%, rgba(15,23,42,0.85) 60%, rgba(15,23,42,0.95) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 18px;
        }
        .hero-content h1 span {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.78);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
            cursor: pointer;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.5);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--dark);
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: var(--dark);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .hero-stat-card {
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.15);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            transition: all var(--transition);
        }
        .hero-stat-card:hover {
            background: rgba(255,255,255,0.14);
            border-color: rgba(255,255,255,0.3);
            transform: translateY(-3px);
        }
        .hero-stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .hero-stat-card .stat-number span {
            color: var(--accent);
        }
        .hero-stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }

        /* Sections */
        section {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            color: var(--dark-alt);
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(30,64,175,0.08);
            color: var(--primary);
            font-weight: 700;
            font-size: 0.85rem;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            background: rgba(30,64,175,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 1.5rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark-alt);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* Category Section */
        .category-section {
            background: var(--surface-alt);
        }
        .category-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .category-card-img {
            position: relative;
            min-height: 280px;
            overflow: hidden;
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .category-card:hover .category-card-img img {
            transform: scale(1.06);
        }
        .category-card-body {
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .category-card-body .tag {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(245,158,11,0.12);
            color: #b45309;
            font-weight: 700;
            font-size: 0.8rem;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
            width: fit-content;
        }
        .category-card-body h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--dark-alt);
        }
        .category-card-body p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
        }
        .category-card-body .btn {
            width: fit-content;
        }

        /* News / CMS List */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .news-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            transition: all var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: transparent;
        }
        .news-item-thumb {
            width: 100px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-alt);
        }
        .news-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-item-info {
            flex: 1;
            min-width: 0;
        }
        .news-item-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 5px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-item-info h4 a {
            color: var(--dark-alt);
        }
        .news-item-info h4 a:hover {
            color: var(--primary);
        }
        .news-item-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .news-item-meta {
            display: flex;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-light);
            align-items: center;
        }
        .news-item-meta .news-tag {
            padding: 3px 10px;
            background: rgba(30,64,175,0.06);
            color: var(--primary);
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.75rem;
            white-space: nowrap;
        }
        .news-empty {
            text-align: center;
            padding: 48px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--border);
        }

        /* Stats */
        .stats-section {
            background: var(--dark);
            color: #fff;
            padding: 64px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item .stat-value {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: #fff;
            line-height: 1;
        }
        .stat-item .stat-value span {
            color: var(--accent);
        }
        .stat-item .stat-desc {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            margin-top: 8px;
        }

        /* Cases */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .case-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .case-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .case-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .case-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .case-card:hover .case-card-img img {
            transform: scale(1.08);
        }
        .case-card-body {
            padding: 20px 22px;
        }
        .case-card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark-alt);
        }
        .case-card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .case-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(16,185,129,0.1);
            color: #059669;
            font-weight: 600;
            font-size: 0.75rem;
            border-radius: var(--radius-full);
            margin-bottom: 8px;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--dark-alt);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: all var(--transition-fast);
            background: none;
            border: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(30,64,175,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition);
            font-size: 1.2rem;
            color: var(--primary);
            font-weight: 700;
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .faq-answer p {
            font-size: 0.93rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--dark), var(--dark-alt));
            color: #fff;
            text-align: center;
            padding: 72px 0;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-primary {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--dark);
            font-size: 1rem;
            padding: 15px 36px;
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--dark);
            box-shadow: var(--shadow-lg);
        }

        /* Footer */
        .footer {
            background: var(--dark-alt);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255,255,255,0.55);
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.55);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-stats {
                grid-template-columns: repeat(4, 1fr);
            }
            .hero-stat-card {
                padding: 18px 14px;
            }
            .hero-stat-card .stat-number {
                font-size: 1.6rem;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .category-card {
                grid-template-columns: 1fr;
            }
            .category-card-img {
                min-height: 200px;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            section {
                padding: 52px 0;
            }
            .hero {
                padding: 56px 0 64px;
                min-height: auto;
            }
            .hero-content h1 {
                font-size: 2.3rem;
            }
        }

        @media (max-width: 768px) {
            .nav { display: none; }
            .hamburger { display: flex; }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .hero-stat-card {
                padding: 16px 12px;
            }
            .hero-stat-card .stat-number {
                font-size: 1.5rem;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-card-body {
                padding: 24px 20px;
            }
            .category-card-body h3 {
                font-size: 1.3rem;
            }
            section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 13px 26px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero {
                padding: 40px 0 48px;
            }
            .hero-content h1 {
                font-size: 1.55rem;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .hero-stat-card {
                padding: 12px 8px;
                border-radius: var(--radius);
            }
            .hero-stat-card .stat-number {
                font-size: 1.3rem;
            }
            .hero-stat-card .stat-label {
                font-size: 0.75rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-item .stat-value {
                font-size: 2rem;
            }
            .news-item {
                flex-direction: column;
                gap: 12px;
            }
            .news-item-thumb {
                width: 100%;
                height: 140px;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .hero-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1a56db;
            --primary-dark: #1040b0;
            --primary-light: #e8f0fe;
            --accent: #0ea5e9;
            --accent-light: #e0f5fd;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --surface: #ffffff;
            --text: #1e293b;
            --text-strong: #0f172a;
            --text-weak: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.09), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.10), 0 6px 12px rgba(0,0,0,0.05);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Consolas", "Monaco", monospace;
            --max-width: 1160px;
            --max-width-article: 780px;
            --nav-height: 64px;
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
        body{font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}
        img{max-width:100%;height:auto;display:block;border-radius:var(--radius)}
        a{color:var(--primary);text-decoration:none;transition:color var(--transition-fast)}
        a:hover{color:var(--primary-dark)}
        button,input,select,textarea{font-family:inherit;font-size:inherit}
        ul,ol{list-style:none}
        h1,h2,h3,h4,h5,h6{color:var(--text-strong);line-height:1.3;font-weight:700}
        h1{font-size:2.2rem;letter-spacing:-0.02em}
        h2{font-size:1.65rem;letter-spacing:-0.01em}
        h3{font-size:1.25rem}
        h4{font-size:1.05rem}
        p{margin-bottom:1rem}
        p:last-child{margin-bottom:0}
        strong{color:var(--text-strong);font-weight:600}
        hr{border:none;border-top:1px solid var(--border);margin:2rem 0}
        blockquote{border-left:3px solid var(--primary);padding:1rem 1.25rem;margin:1.5rem 0;background:var(--primary-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-strong);font-style:italic}
        code{font-family:var(--font-mono);font-size:0.88em;background:var(--bg-alt);padding:0.15em 0.4em;border-radius:3px;color:var(--primary-dark)}
        pre{background:var(--text-strong);color:#e2e8f0;padding:1.25rem;border-radius:var(--radius);overflow-x:auto;margin:1.5rem 0;font-size:0.9rem;line-height:1.6}
        pre code{background:none;color:inherit;padding:0;font-size:inherit}

        .container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
        .container--narrow{max-width:var(--max-width-article)}
        .container--wide{max-width:1280px}

        /* Header & Nav */
        .header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow-xs);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:rgba(255,255,255,0.92)}
        .header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-height);max-width:var(--max-width);margin:0 auto;padding:0 24px}
        .logo{font-size:1.25rem;font-weight:700;color:var(--text-strong);letter-spacing:-0.01em;white-space:nowrap;display:flex;align-items:center;gap:8px}
        .logo-icon{width:36px;height:36px;background:var(--primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem;font-weight:700;flex-shrink:0}
        .logo:hover{color:var(--primary)}
        .nav{display:flex;align-items:center;gap:6px}
        .nav a{display:inline-flex;align-items:center;padding:8px 16px;border-radius:var(--radius-sm);font-size:0.93rem;font-weight:500;color:var(--text-weak);transition:all var(--transition-fast);white-space:nowrap;text-decoration:none}
        .nav a:hover{color:var(--primary);background:var(--primary-light)}
        .nav a.active{color:var(--primary);background:var(--primary-light);font-weight:600}
        .nav-cta{background:var(--primary)!important;color:#fff!important;padding:9px 20px!important;border-radius:var(--radius-sm)!important;font-weight:600!important;box-shadow:0 2px 8px rgba(26,86,219,0.25)}
        .nav-cta:hover{background:var(--primary-dark)!important;color:#fff!important;box-shadow:0 4px 14px rgba(26,86,219,0.35)!important;transform:translateY(-1px)}
        .nav-cta:active{transform:translateY(0)}
        .nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer;padding:8px;border-radius:var(--radius-sm);transition:all var(--transition-fast)}
        .nav-toggle:hover{background:var(--bg-alt);color:var(--primary)}

        /* Article Header */
        .article-header{padding:2.5rem 0 1.5rem;background:var(--surface);border-bottom:1px solid var(--border-light)}
        .breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:0.88rem;color:var(--text-muted);margin-bottom:1.25rem}
        .breadcrumb a{color:var(--text-weak);text-decoration:none;transition:color var(--transition-fast)}
        .breadcrumb a:hover{color:var(--primary)}
        .breadcrumb .sep{color:var(--text-muted);font-size:0.7rem}
        .breadcrumb .current{color:var(--text-strong);font-weight:500}
        .article-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:0.75rem}
        .article-meta-item{display:inline-flex;align-items:center;gap:6px;font-size:0.88rem;color:var(--text-weak)}
        .article-meta-item i{color:var(--primary);font-size:0.85rem;width:16px;text-align:center}
        .category-badge{display:inline-flex;align-items:center;padding:5px 12px;background:var(--accent-light);color:var(--accent);border-radius:20px;font-size:0.82rem;font-weight:600;text-decoration:none;transition:all var(--transition-fast)}
        .category-badge:hover{background:var(--accent);color:#fff;text-decoration:none}
        .category-badge i{margin-right:4px;font-size:0.7rem}

        /* Article Body */
        .article-body-section{padding:2rem 0 3rem}
        .article-featured-image{margin-bottom:2rem;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
        .article-featured-image img{width:100%;height:auto;border-radius:var(--radius-lg);object-fit:cover;max-height:480px}
        .article-content{font-size:1.05rem;line-height:1.85;color:var(--text)}
        .article-content h2{margin:2rem 0 0.75rem;padding-top:0.5rem}
        .article-content h3{margin:1.5rem 0 0.6rem}
        .article-content h2:first-child{margin-top:0}
        .article-content ul,.article-content ol{margin:1rem 0;padding-left:1.5rem}
        .article-content ul{list-style:disc}
        .article-content ol{list-style:decimal}
        .article-content li{margin-bottom:0.5rem}
        .article-content table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:0.93rem}
        .article-content table th,.article-content table td{border:1px solid var(--border);padding:10px 14px;text-align:left}
        .article-content table th{background:var(--bg-alt);font-weight:600;color:var(--text-strong)}
        .article-content table tr:nth-child(even){background:var(--bg)}
        .article-content img{border-radius:var(--radius);margin:1.5rem auto;box-shadow:var(--shadow-sm)}
        .article-content figure{margin:1.5rem 0}
        .article-content figcaption{text-align:center;font-size:0.88rem;color:var(--text-muted);margin-top:0.5rem}

        /* Article Footer */
        .article-footer-meta{border-top:1px solid var(--border);padding-top:1.5rem;margin-top:2.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
        .article-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
        .article-tags span{font-size:0.85rem;color:var(--text-muted)}
        .tag{display:inline-block;padding:4px 10px;background:var(--bg-alt);color:var(--text-weak);border-radius:var(--radius-sm);font-size:0.82rem;transition:all var(--transition-fast);text-decoration:none}
        .tag:hover{background:var(--primary-light);color:var(--primary);text-decoration:none}
        .back-link{display:inline-flex;align-items:center;gap:6px;font-weight:500;color:var(--primary);text-decoration:none;transition:all var(--transition-fast);font-size:0.93rem}
        .back-link:hover{color:var(--primary-dark);gap:10px}

        /* Related Articles */
        .related-section{padding:2.5rem 0 3.5rem;background:var(--bg-alt)}
        .related-section .section-label{font-size:0.82rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--primary);font-weight:700;margin-bottom:0.5rem}
        .related-section .section-title{font-size:1.5rem;font-weight:700;color:var(--text-strong);margin-bottom:1.5rem}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .related-card{background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-xs);border:1px solid var(--border-light);transition:all var(--transition);display:flex;flex-direction:column;text-decoration:none;color:inherit}
        .related-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);text-decoration:none;color:inherit;border-color:var(--border)}
        .related-card:hover .related-card-title{color:var(--primary)}
        .related-card-img{height:180px;overflow:hidden;position:relative}
        .related-card-img img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--transition-slow)}
        .related-card:hover .related-card-img img{transform:scale(1.04)}
        .related-card-body{padding:1.1rem 1.2rem 1.2rem;flex:1;display:flex;flex-direction:column}
        .related-card-cat{font-size:0.78rem;color:var(--accent);font-weight:600;margin-bottom:0.4rem}
        .related-card-title{font-size:1rem;font-weight:600;color:var(--text-strong);margin-bottom:0.5rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color var(--transition-fast)}
        .related-card-desc{font-size:0.85rem;color:var(--text-weak);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
        .related-card-date{font-size:0.78rem;color:var(--text-muted);margin-top:0.6rem}

        /* CTA Section */
        .cta-section{padding:3.5rem 0;background:var(--surface);text-align:center}
        .cta-section .cta-inner{max-width:600px;margin:0 auto}
        .cta-section h2{font-size:1.6rem;margin-bottom:0.75rem;color:var(--text-strong)}
        .cta-section p{color:var(--text-weak);margin-bottom:1.5rem;font-size:1rem}
        .btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:0.95rem;cursor:pointer;transition:all var(--transition-fast);border:none;text-decoration:none;white-space:nowrap}
        .btn-primary{background:var(--primary);color:#fff;box-shadow:0 2px 10px rgba(26,86,219,0.3)}
        .btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 6px 20px rgba(26,86,219,0.4);transform:translateY(-2px)}
        .btn-primary:active{transform:translateY(0)}
        .btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
        .btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);transform:translateY(-2px)}
        .btn-outline:active{transform:translateY(0)}
        .btn-lg{padding:14px 36px;font-size:1rem;border-radius:var(--radius)}
        .btn-group{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}

        /* Not Found */
        .not-found{padding:4rem 0;text-align:center}
        .not-found-icon{font-size:4rem;color:var(--text-muted);margin-bottom:1.5rem}
        .not-found h2{font-size:1.6rem;margin-bottom:0.75rem}
        .not-found p{color:var(--text-weak);margin-bottom:1.5rem;max-width:480px;margin-left:auto;margin-right:auto}

        /* Footer */
        .footer{background:var(--text-strong);color:#cbd5e1;padding:3rem 0 0}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:2.5rem;border-bottom:1px solid rgba(255,255,255,0.1)}
        .footer-logo{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:0.75rem}
        .footer-brand p{font-size:0.9rem;line-height:1.6;color:#94a3b8;max-width:300px}
        .footer-col h4{color:#fff;font-size:0.95rem;margin-bottom:1rem;font-weight:600}
        .footer-col a{display:block;color:#94a3b8;font-size:0.9rem;padding:5px 0;transition:color var(--transition-fast);text-decoration:none}
        .footer-col a:hover{color:#fff;text-decoration:none}
        .footer-bottom{padding:1.5rem 0;text-align:center;font-size:0.85rem;color:#64748b}

        /* Responsive */
        @media (max-width:1024px){
            .related-grid{grid-template-columns:repeat(2,1fr)}
            .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
            .footer-brand{grid-column:1/-1}
            h1{font-size:1.85rem}
            .article-featured-image img{max-height:360px}
        }
        @media (max-width:768px){
            .header-inner{padding:0 16px}
            .nav{gap:2px}
            .nav a{padding:7px 10px;font-size:0.85rem}
            .nav-cta{padding:7px 14px!important;font-size:0.85rem!important}
            .related-grid{grid-template-columns:1fr;gap:16px}
            .related-card-img{height:200px}
            .footer-grid{grid-template-columns:1fr;gap:24px}
            .article-body-section{padding:1.5rem 0 2rem}
            .article-content{font-size:1rem}
            .container{padding:0 16px}
            h1{font-size:1.55rem}
            .article-meta{gap:10px}
            .article-footer-meta{flex-direction:column;align-items:flex-start}
            .cta-section{padding:2.5rem 0}
            .cta-section h2{font-size:1.3rem}
            .btn-group{flex-direction:column;align-items:center}
        }
        @media (max-width:520px){
            .header-inner{height:56px}
            .logo{font-size:1.05rem}
            .logo-icon{width:30px;height:30px;font-size:0.85rem}
            .nav a{padding:6px 8px;font-size:0.8rem;border-radius:4px}
            .nav-cta{padding:6px 10px!important;font-size:0.8rem!important}
            .nav{gap:1px}
            h1{font-size:1.35rem}
            .article-header{padding:1.5rem 0 1rem}
            .breadcrumb{font-size:0.8rem}
            .article-featured-image img{max-height:240px}
            .related-card-img{height:160px}
            .cta-section h2{font-size:1.15rem}
            .btn-lg{padding:12px 24px;font-size:0.9rem}
            .footer{padding:2rem 0 0}
        }

@media (max-width:520px){
            .nav{display:none;flex-direction:column;position:absolute;top:var(--nav-height);left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);padding:8px 16px 16px;box-shadow:var(--shadow-md);z-index:99;gap:4px}
            .nav--open{display:flex}
            .nav a{width:100%;padding:10px 14px;border-radius:var(--radius-sm)}
            .nav-cta{text-align:center;justify-content:center}
            .nav-toggle{display:block}
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-brand: #2563eb;
            --color-brand-dark: #1d4ed8;
            --color-brand-light: #dbeafe;
            --color-accent: #16a34a;
            --color-accent-light: #dcfce7;
            --color-warm: #f59e0b;
            --color-warm-light: #fef3c7;
            --color-surface: #f8fafc;
            --color-surface-alt: #f1f5f9;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-text: #1e293b;
            --color-text-soft: #475569;
            --color-text-muted: #94a3b8;
            --color-white: #ffffff;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 0.875rem;
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.06), 0 1px 2px -1px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
            --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.10), 0 4px 10px -6px rgba(0,0,0,0.08);
            --shadow-xl: 0 20px 40px -8px rgba(0,0,0,0.12);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 250ms cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'system-ui', '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'sans-serif';
            font-size: 16px;
            line-height: 1.625;
            color: var(--color-text);
            background-color: var(--color-surface);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            padding: 0;
        }
        ul, ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.3;
        }
        p {
            margin: 0;
        }
        :focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 2rem;
        }
        .header-logo {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-brand);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }
        .header-logo:hover {
            color: var(--color-brand-dark);
        }
        .header-logo .logo-icon {
            display: inline-block;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            border-radius: var(--radius-sm);
            margin-right: 0.5rem;
            vertical-align: middle;
            position: relative;
            top: -1px;
            box-shadow: 0 2px 8px rgba(37,99,235,0.25);
        }

        /* ===== 导航 ===== */
        .nav {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.9375rem;
            font-weight: 500;
        }
        .nav a {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-md);
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav a:hover {
            color: var(--color-brand);
            background: var(--color-brand-light);
        }
        .nav a.active {
            color: var(--color-brand);
            background: var(--color-brand-light);
            font-weight: 600;
        }
        .nav a.nav-cta {
            background: var(--color-brand);
            color: #fff;
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            margin-left: 0.5rem;
            box-shadow: 0 2px 6px rgba(37,99,235,0.25);
            transition: all var(--transition-smooth);
        }
        .nav a.nav-cta:hover {
            background: var(--color-brand-dark);
            box-shadow: 0 4px 14px rgba(37,99,235,0.35);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ===== 移动端菜单按钮 ===== */
        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .mobile-menu-btn:hover {
            background: var(--color-surface-alt);
        }
        .mobile-menu-btn .hamburger-line {
            display: block;
            width: 22px;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            position: relative;
            transition: all var(--transition-smooth);
        }
        .mobile-menu-btn .hamburger-line::before,
        .mobile-menu-btn .hamburger-line::after {
            content: '';
            display: block;
            width: 22px;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            position: absolute;
            left: 0;
            transition: all var(--transition-smooth);
        }
        .mobile-menu-btn .hamburger-line::before {
            top: -7px;
        }
        .mobile-menu-btn .hamburger-line::after {
            top: 7px;
        }
        .mobile-menu-btn.open .hamburger-line {
            background: transparent;
        }
        .mobile-menu-btn.open .hamburger-line::before {
            top: 0;
            transform: rotate(45deg);
        }
        .mobile-menu-btn.open .hamburger-line::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            min-height: 60vh;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: 4rem 0;
        }
        .section-sm {
            padding: 2.5rem 0;
        }
        .section-lg {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 2.5rem 0;
            }
            .section-lg {
                padding: 3rem 0;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-soft);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-brand);
        }
        .breadcrumb .separator {
            color: var(--color-border);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ===== 分类Banner ===== */
        .category-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 5rem 0 4rem;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,58,138,0.88) 0%, rgba(23,37,84,0.82) 40%, rgba(15,23,42,0.78) 100%);
            z-index: 1;
        }
        .category-banner .banner-content {
            position: relative;
            z-index: 2;
        }
        .category-banner .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.2);
            color: #fff;
            padding: 0.35rem 0.9rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 1.25rem;
        }
        .category-banner h1 {
            font-size: 2.75rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            line-height: 1.2;
        }
        .category-banner .banner-desc {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .category-banner {
                padding: 3.5rem 0 2.5rem;
            }
            .category-banner h1 {
                font-size: 1.85rem;
            }
            .category-banner .banner-desc {
                font-size: 0.95rem;
            }
        }

        /* ===== 统计仪表盘卡片 ===== */
        .stat-dashboard {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 1.5rem 1.25rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-brand);
            border-radius: 0 0 6px 6px;
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: transparent;
        }
        .stat-card:hover::after {
            opacity: 0.7;
        }
        .stat-card .stat-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        .stat-card .stat-icon.blue {
            background: #dbeafe;
            color: #2563eb;
        }
        .stat-card .stat-icon.green {
            background: #dcfce7;
            color: #16a34a;
        }
        .stat-card .stat-icon.amber {
            background: #fef3c7;
            color: #d97706;
        }
        .stat-card .stat-icon.purple {
            background: #f3e8ff;
            color: #7c3aed;
        }
        .stat-card .stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 0.3rem;
        }
        .stat-card .stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        .stat-card .stat-change {
            display: inline-flex;
            align-items: center;
            gap: 0.2rem;
            font-size: 0.78rem;
            font-weight: 600;
            margin-top: 0.4rem;
            color: #16a34a;
        }
        @media (max-width: 1024px) {
            .stat-dashboard {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stat-dashboard {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 文章卡片网格 ===== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .article-card {
            background: #fff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .article-card .card-image-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-surface-alt);
        }
        .article-card .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .card-image-wrap img {
            transform: scale(1.04);
        }
        .article-card .card-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            z-index: 2;
            background: rgba(37,99,235,0.9);
            color: #fff;
            padding: 0.25rem 0.7rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
        }
        .article-card .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-card .card-meta .dot {
            width: 4px;
            height: 4px;
            background: var(--color-border);
            border-radius: 50%;
        }
        .article-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-excerpt {
            font-size: 0.875rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-readmore {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            margin-top: 0.75rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-brand);
            transition: gap var(--transition-fast);
        }
        .article-card .card-readmore:hover {
            gap: 0.5rem;
        }
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .article-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 功能矩阵 ===== */
        .feature-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
        .feature-matrix-item {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.25rem;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            text-align: center;
        }
        .feature-matrix-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-brand-light);
            transform: translateY(-2px);
        }
        .feature-matrix-item .fm-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 0.75rem;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            background: var(--color-brand-light);
            color: var(--color-brand);
        }
        .feature-matrix-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.35rem;
        }
        .feature-matrix-item p {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .feature-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .feature-matrix {
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
            }
            .feature-matrix-item {
                padding: 1rem 0.75rem;
            }
        }

        /* ===== 客户案例条 ===== */
        .case-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .case-card {
            background: #fff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
        }
        .case-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .case-card .case-img {
            aspect-ratio: 3 / 2;
            overflow: hidden;
            background: var(--color-surface-alt);
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-img img {
            transform: scale(1.05);
        }
        .case-card .case-info {
            padding: 1rem 1.25rem 1.25rem;
        }
        .case-card .case-info h4 {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 0.3rem;
        }
        .case-card .case-info .case-client {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        @media (max-width: 768px) {
            .case-strip {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 40%, #2563eb 100%);
            border-radius: var(--radius-2xl);
            padding: 3.5rem 2.5rem;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: rgba(255,255,255,0.03);
            border-radius: 50%;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 1.75rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 1.75rem;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #fff;
            color: #1d4ed8;
            padding: 0.85rem 2rem;
            border-radius: 9999px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 8px 24px rgba(0,0,0,0.18);
            transition: all var(--transition-smooth);
        }
        .btn-cta-large:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0,0,0,0.25);
            color: #1e40af;
        }
        @media (max-width: 520px) {
            .cta-section {
                padding: 2.5rem 1.25rem;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
        }

        /* ===== 板块标题 ===== */
        .section-header {
            margin-bottom: 2rem;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-brand);
            background: var(--color-brand-light);
            padding: 0.3rem 0.8rem;
            border-radius: 9999px;
            letter-spacing: 0.03em;
            margin-bottom: 0.6rem;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.015em;
            margin-bottom: 0.4rem;
        }
        .section-header .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            max-width: 520px;
        }
        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 1.35rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #fff;
            border-top: 1px solid var(--color-border);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-brand);
            margin-bottom: 0.6rem;
        }
        .footer-brand p {
            font-size: 0.875rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }
        .footer-col a {
            display: block;
            font-size: 0.875rem;
            color: var(--color-text-soft);
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-brand);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border-light);
            padding-top: 1.25rem;
            text-align: center;
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }

        /* ===== 移动端导航面板 ===== */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
            }
            .nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                bottom: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 1.5rem 1rem;
                gap: 0.5rem;
                transform: translateX(100%);
                transition: transform var(--transition-smooth);
                z-index: 99;
                overflow-y: auto;
                box-shadow: var(--shadow-xl);
            }
            .nav.open {
                transform: translateX(0);
            }
            .nav a {
                padding: 0.85rem 1rem;
                font-size: 1rem;
                border-radius: var(--radius-md);
                justify-content: flex-start;
            }
            .nav a.nav-cta {
                margin-left: 0;
                justify-content: center;
                margin-top: 0.5rem;
            }
        }

        /* ===== 辅助工具类 ===== */
        .text-brand { color: var(--color-brand); }
        .text-muted { color: var(--color-text-muted); }
        .fw-700 { font-weight: 700; }
        .fw-800 { font-weight: 800; }