/* roulang page: index */
:root {
            --primary: #0d1b2e;
            --primary-light: #1b2f4e;
            --accent: #d4a853;
            --accent-light: #e6c877;
            --accent-dark: #b8903f;
            --bg: #f7f6f2;
            --bg-alt: #f0ede6;
            --bg-dark: #0d1b2e;
            --text: #1f2937;
            --text-light: #6b7280;
            --text-white: #f5f0e8;
            --border: #e5e0d8;
            --white: #ffffff;
            --radius: 16px;
            --radius-lg: 24px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.14);
            --shadow-accent: 0 4px 24px rgba(212,168,83,0.4);
            --transition: all 0.3s ease;
            --max-width: 1240px;
            --gap: 24px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button, input, select {
            font-family: inherit;
        }
        ul, ol {
            list-style: none;
        }
        a:focus-visible, button:focus-visible {
            outline: 3px solid rgba(212,168,83,0.6);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: 96px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212,168,83,0.12);
            color: var(--accent-dark);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 30px;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .section-label i {
            font-size: 12px;
        }
        .section-title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 17px;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 48px;
        }
        .section-head-center {
            text-align: center;
        }
        .section-head-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(13, 27, 46, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding: 0;
            height: 72px;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 32px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0d1b2e;
            font-size: 20px;
            font-weight: 800;
            box-shadow: var(--shadow-accent);
        }
        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 40px;
            color: rgba(255,255,255,0.75);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--accent-light);
            background: rgba(212,168,83,0.12);
        }
        .nav-link.active {
            color: #0d1b2e;
            background: var(--accent);
            font-weight: 600;
            box-shadow: 0 2px 16px rgba(212,168,83,0.4);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #0d1b2e;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 40px;
            transition: var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .header-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }
        /* Mobile Tabbar */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 998;
            background: rgba(13,27,46,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 10px 12px 14px;
            justify-content: space-around;
            box-shadow: 0 -4px 24px rgba(0,0,0,0.2);
        }
        .mobile-tabbar .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            color: rgba(255,255,255,0.6);
            font-size: 11px;
            padding: 6px 12px;
            border-radius: 12px;
            transition: var(--transition);
            min-width: 60px;
        }
        .mobile-tabbar .tab-item i {
            font-size: 20px;
        }
        .mobile-tabbar .tab-item.active {
            color: var(--accent);
        }
        .mobile-tabbar .tab-item.active i {
            transform: scale(1.1);
        }
        /* Hero */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(13,27,46,0.96) 0%, rgba(13,27,46,0.82) 50%, rgba(13,27,46,0.65) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 120px 0;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(212,168,83,0.2) 0%, transparent 70%);
            border-radius: 50%;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -80px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(212,168,83,0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212,168,83,0.18);
            border: 1px solid rgba(212,168,83,0.35);
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 20px;
            border-radius: 40px;
            margin-bottom: 28px;
            letter-spacing: 0.5px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero-title {
            font-size: clamp(36px, 6vw, 60px);
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 17px;
            line-height: 1.9;
            color: rgba(255,255,255,0.8);
            margin-bottom: 40px;
            max-width: 600px;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #0d1b2e;
            box-shadow: 0 4px 20px rgba(212,168,83,0.4);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(212,168,83,0.5);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--border);
        }
        .btn-light:hover {
            background: var(--bg-alt);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        /* Features */
        .features {
            background: var(--white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 3px;
        }
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: rgba(212,168,83,0.4);
        }
        .feature-card:hover::after {
            width: 60px;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 24px;
            background: linear-gradient(135deg, rgba(212,168,83,0.2), rgba(212,168,83,0.08));
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--accent-dark);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        /* Categories */
        .categories {
            background: var(--bg);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .category-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212,168,83,0.4);
        }
        .category-cover {
            height: 200px;
            position: relative;
            overflow: hidden;
        }
        .category-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-cover img {
            transform: scale(1.06);
        }
        .category-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(13,27,46,0.4), transparent 60%);
        }
        .category-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--accent-dark);
            background: rgba(212,168,83,0.1);
            padding: 6px 14px;
            border-radius: 30px;
            margin-bottom: 16px;
            align-self: flex-start;
        }
        .category-body h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .category-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }
        .category-link:hover {
            color: var(--accent-dark);
            gap: 14px;
        }
        /* News Section */
        .news {
            background: var(--white);
        }
        .news-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: start;
        }
        .news-intro {
            position: sticky;
            top: 96px;
        }
        .news-intro .section-desc {
            margin-bottom: 24px;
        }
        .news-list {
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 8px 0;
            overflow: hidden;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: var(--transition);
            flex-wrap: wrap;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: var(--white);
            padding-left: 30px;
        }
        .news-badge {
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 600;
            background: rgba(212,168,83,0.15);
            color: var(--accent-dark);
            padding: 4px 14px;
            border-radius: 30px;
            letter-spacing: 0.5px;
        }
        .news-title {
            flex: 1;
            font-size: 15px;
            color: var(--text);
            line-height: 1.5;
            font-weight: 500;
        }
        .news-item:hover .news-title {
            color: var(--primary);
        }
        .news-time {
            font-size: 13px;
            color: var(--text-light);
            flex-shrink: 0;
        }
        .news-empty {
            padding: 48px;
            text-align: center;
            color: var(--text-light);
            font-size: 15px;
        }
        /* Stats */
        .stats {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #16273d 100%);
            position: relative;
            overflow: hidden;
        }
        .stats::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(212,168,83,0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 40px 20px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255,255,255,0.08);
            transform: translateY(-4px);
        }
        .stat-number {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 15px;
            color: rgba(255,255,255,0.7);
            font-weight: 400;
        }
        /* Process */
        .process {
            background: var(--bg);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }
        .step-number {
            width: 88px;
            height: 88px;
            margin: 0 auto 24px;
            background: var(--white);
            border: 2px solid var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-dark);
            box-shadow: 0 0 0 6px rgba(212,168,83,0.1);
            transition: var(--transition);
        }
        .process-step:hover .step-number {
            background: var(--accent);
            color: var(--white);
            transform: scale(1.06);
            box-shadow: 0 0 0 10px rgba(212,168,83,0.15);
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        /* FAQ */
        .faq {
            background: var(--white);
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
            align-items: start;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 28px;
            margin-bottom: 16px;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212,168,83,0.4);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 16px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            margin-top: 14px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-light);
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        /* CTA */
        .cta-section {
            padding: 96px 0;
            background: linear-gradient(135deg, rgba(13,27,46,0.95), rgba(13,27,46,0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }
        .cta-content {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-content .section-title {
            color: var(--text-white);
        }
        .cta-content .section-desc {
            color: rgba(255,255,255,0.75);
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 32px;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        /* Footer */
        .site-footer {
            background: #0a1526;
            padding: 64px 0 100px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand {
            max-width: 360px;
        }
        .footer-brand .logo-text {
            margin-bottom: 16px;
            display: inline-block;
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            line-height: 1.8;
            margin-top: 16px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            section {
                padding: 72px 0;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }
            .process-steps::before {
                display: none;
            }
            .news-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .news-intro {
                position: static;
            }
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: 56px 0;
            }
            .site-header {
                height: 64px;
            }
            .header-inner {
                height: 64px;
            }
            .logo {
                gap: 8px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
                border-radius: 10px;
            }
            .logo-text {
                font-size: 18px;
            }
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .mobile-tabbar {
                display: flex;
            }
            .hero {
                min-height: 480px;
                padding: 80px 0;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .category-cover {
                height: 180px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-number {
                font-size: 30px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .process-step {
                padding: 0;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 64px 0;
            }
            .btn {
                padding: 12px 28px;
                font-size: 14px;
            }
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .news-item {
                padding: 16px 18px;
                gap: 10px;
            }
            .news-badge {
                font-size: 11px;
                padding: 3px 10px;
            }
            .news-title {
                font-size: 14px;
            }
            .news-time {
                width: 100%;
                padding-left: 0;
                font-size: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-desc {
                font-size: 15px;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-buttons .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-bottom: 64px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-light: #f1f5f9;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text-main: #1e293b;
            --text-body: #475569;
            --text-muted: #94a3b8;
            --text-invert: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-full: 999px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
            --space-sm: 12px;
            --space-md: 24px;
            --space-lg: 48px;
            --space-xl: 80px;
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease, background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font: inherit;
            border: none;
            outline: none;
        }

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

        .section {
            padding: 72px 0;
        }

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

        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            border: 1px solid var(--primary-light);
        }

        .section-header h2 {
            font-size: 34px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
            font-weight: 700;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
        }

        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-invert);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: var(--shadow-sm);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 15px;
            color: var(--text-body);
            font-weight: 500;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-50);
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-50);
            font-weight: 600;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-invert);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
            color: var(--text-invert);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-invert);
            border-color: rgba(255, 255, 255, 0.6);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-invert);
            color: var(--text-invert);
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 16px;
        }

        .btn-secondary {
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid var(--primary-light);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .article-hero {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), rgba(37, 99, 235, 0.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: var(--text-invert);
            text-align: center;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }

        .breadcrumb a:hover {
            color: var(--text-invert);
        }

        .breadcrumb i {
            font-size: 10px;
            opacity: 0.7;
        }

        .article-hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            opacity: 0.8;
        }

        .article-main {
            padding-top: 56px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 40px;
            align-items: start;
        }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 40px;
            border: 1px solid var(--border-light);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin: 32px 0 16px;
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin: 24px 0 12px;
            line-height: 1.4;
        }

        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 20px 0 10px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-50);
            padding: 20px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            color: var(--text-main);
            font-style: italic;
        }

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-md);
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }

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

        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
        }

        .article-tags i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .tag {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .article-not-found i {
            font-size: 56px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-not-found h2 {
            font-size: 28px;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }

        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }

        .sidebar-widget h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
            position: relative;
        }

        .sidebar-widget h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 32px;
            height: 2px;
            background: var(--primary);
        }

        .sidebar-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 14px;
            color: var(--text-body);
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }

        .sidebar-links a:hover {
            background: var(--primary-50);
            color: var(--primary);
            border-color: var(--primary-light);
            transform: translateX(4px);
        }

        .sidebar-links a i {
            color: var(--primary);
            font-size: 16px;
            width: 22px;
            text-align: center;
        }

        .sidebar-news {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            flex-direction: column;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all 0.3s ease;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            padding-left: 6px;
        }

        .news-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item:hover .news-title {
            color: var(--primary);
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        .sidebar-tip {
            background: linear-gradient(135deg, var(--accent-light), #fff7ed);
            border: 1px solid #fde68a;
        }

        .sidebar-tip i {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .sidebar-tip h3 {
            border-bottom-color: #fde68a;
            color: var(--accent-dark);
        }

        .sidebar-tip h3::after {
            background: var(--accent);
        }

        .sidebar-tip p {
            font-size: 14px;
            color: #92400e;
            line-height: 1.6;
        }

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

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all 0.35s ease;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .related-img {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .related-card:hover .related-img img {
            transform: scale(1.05);
        }

        .related-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(37, 99, 235, 0.9);
            color: var(--text-invert);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }

        .related-body {
            padding: 24px;
        }

        .related-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-meta i {
            font-size: 13px;
        }

        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .value-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
        }

        .value-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .value-card i {
            font-size: 42px;
            color: var(--primary);
            display: block;
            margin-bottom: 20px;
        }

        .value-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .value-card p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-muted);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .faq-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .faq-item h3 i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
        }

        .faq-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            padding-left: 28px;
        }

        .cta-section {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(37, 99, 235, 0.85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            padding: 80px 0;
            text-align: center;
            color: var(--text-invert);
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 64px 0 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }

        .footer-brand .logo-text {
            color: var(--text-invert);
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-invert);
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #94a3b8;
            transition: all 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }

        .footer-links a i {
            font-size: 10px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 13px;
            color: #64748b;
        }

        .footer-bottom span:first-child {
            color: #94a3b8;
        }

        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-light);
            z-index: 200;
            padding: 6px 0;
            padding-bottom: calc(6px + env(safe-area-inset-bottom));
            box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.06);
        }

        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            padding: 4px 8px;
            font-size: 11px;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
        }

        .tab-item i {
            font-size: 19px;
        }

        .tab-item.active {
            color: var(--primary);
        }

        .tab-item:hover {
            color: var(--primary);
        }

        .tab-item.active i {
            transform: scale(1.05);
        }

        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
                order: 2;
            }

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

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

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

            .main-nav {
                gap: 2px;
            }

            .nav-link {
                padding: 8px 12px;
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .article-hero {
                padding: 56px 0 48px;
            }

            .article-hero h1 {
                font-size: 28px;
            }

            .article-body {
                padding: 24px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .header-cta {
                display: none;
            }

            .main-nav {
                gap: 0;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
            }

            .main-nav::-webkit-scrollbar {
                display: none;
            }

            .nav-link {
                padding: 8px 10px;
                font-size: 13px;
                white-space: nowrap;
            }

            .logo-text {
                font-size: 17px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .mobile-tabbar {
                display: flex;
                justify-content: space-around;
            }

            .tab-item {
                flex: 1;
                max-width: 90px;
            }

            body {
                padding-bottom: 64px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .section-header h2 {
                font-size: 26px;
            }

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

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

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

            .article-hero h1 {
                font-size: 24px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-body {
                padding: 20px;
                border-radius: var(--radius-md);
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .cta-buttons .btn {
                width: 100%;
                max-width: 280px;
            }

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

            .header-inner {
                height: 64px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #171d30;
            --primary-light: #222a43;
            --primary-dark: #0e1320;
            --accent: #d4a643;
            --accent-hover: #b99235;
            --accent-soft: rgba(212, 166, 67, 0.12);
            --bg: #ffffff;
            --bg-soft: #f3f5fa;
            --bg-dark: #10141f;
            --text: #1e2533;
            --text-muted: #657287;
            --text-light: #aab3c5;
            --border: #e2e7ee;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 10px rgba(23, 29, 48, 0.06);
            --shadow-md: 0 10px 30px rgba(23, 29, 48, 0.09);
            --shadow-lg: 0 20px 50px rgba(23, 29, 48, 0.13);
            --header-h: 74px;
            --tabbar-h: 62px;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-bottom: var(--tabbar-h);
        }

        @media (min-width: 992px) {
            body {
                padding-bottom: 0;
            }
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 共享 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow 0.35s ease, background 0.35s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(23, 29, 48, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), #e8c76a);
            color: #111827;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            font-style: normal;
            box-shadow: 0 4px 12px rgba(212, 166, 67, 0.35);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all 0.28s ease;
            line-height: 1.4;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-soft);
            transform: translateY(-1px);
        }

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(23, 29, 48, 0.25);
        }

        .header-action {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: color 0.3s;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #e0b95a);
            color: #1a1a1a;
            box-shadow: 0 6px 20px rgba(212, 166, 67, 0.35);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(212, 166, 67, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: rgba(23, 29, 48, 0.3);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(23, 29, 48, 0.04);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
        }

        .btn-light-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.55);
        }

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

        /* ===== 移动端底部 Tab ===== */
        .mobile-tabbar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: var(--tabbar-h);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid var(--border);
            display: flex;
            align-items: stretch;
            z-index: 1100;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            font-size: 12px;
            color: var(--text-muted);
            transition: color 0.25s ease;
        }

        .tab-item i {
            font-size: 19px;
            transition: transform 0.25s ease;
        }

        .tab-item.active {
            color: var(--accent);
        }

        .tab-item.active i {
            transform: translateY(-1px);
        }

        .tab-item:hover {
            color: var(--primary);
        }

        @media (min-width: 992px) {
            .mobile-tabbar {
                display: none;
            }
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 150px 0 110px;
            isolation: isolate;
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 19, 32, 0.92) 0%, rgba(14, 19, 32, 0.75) 50%, rgba(23, 29, 48, 0.45) 100%);
            z-index: -1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.3s;
        }

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

        .breadcrumb i.fa-chevron-right {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.4);
        }

        .breadcrumb span {
            color: #fff;
            font-weight: 500;
        }

        .page-banner h1 {
            font-size: 46px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .page-banner p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 36px;
        }

        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 120px 0 70px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .page-banner p {
                font-size: 15px;
            }
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 90px 0;
        }

        .section-block.alt {
            background: var(--bg-soft);
        }

        .section-header {
            max-width: 680px;
            margin: 0 auto 56px;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
        }

        /* ===== 平台概览（图文） ===== */
        .intro-section {
            padding: 90px 0;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .intro-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .intro-media img {
            width: 100%;
            height: 430px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .intro-media:hover img {
            transform: scale(1.03);
        }

        .media-badge {
            position: absolute;
            left: 20px;
            bottom: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow-md);
        }

        .media-badge i {
            color: var(--accent);
        }

        .intro-content {
            padding: 10px 0;
        }

        .intro-content .section-tag {
            margin-bottom: 14px;
        }

        .intro-content h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .intro-content p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.85;
            margin-bottom: 24px;
        }

        .intro-list {
            display: grid;
            gap: 14px;
        }

        .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }

        .intro-list li i {
            color: var(--accent);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        @media (max-width: 992px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .intro-media img {
                height: 300px;
            }
        }

        @media (max-width: 768px) {
            .intro-section {
                padding: 60px 0;
            }
            .intro-content h2 {
                font-size: 27px;
            }
        }

        /* ===== 核心功能卡片 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            border: 1px solid var(--border);
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent 80%);
            opacity: 0;
            transition: opacity 0.35s;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent-hover);
            margin-bottom: 22px;
            transition: all 0.35s ease;
        }

        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: var(--accent);
            transform: scale(1.08) rotate(-4deg);
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        @media (max-width: 992px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 28px 22px;
            }
        }

        /* ===== 上手流程 ===== */
        .process-section {
            position: relative;
            background: var(--primary);
            padding: 90px 0;
            overflow: hidden;
        }

        .process-section::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 166, 67, 0.15), transparent 70%);
        }

        .process-section .section-header h2 {
            color: #fff;
        }

        .process-section .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        .process-section .section-tag {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 26px;
            position: relative;
            z-index: 2;
            margin-top: 20px;
        }

        .process-step {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            position: relative;
            transition: all 0.35s ease;
        }

        .process-step:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-5px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #eed18a);
            color: #111;
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .process-step h3 {
            font-size: 17px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
            .process-section {
                padding: 60px 0;
            }
        }

        /* ===== 统计数字 ===== */
        .stats-band {
            padding: 70px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            isolation: isolate;
        }

        .stats-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(14, 19, 32, 0.86);
            z-index: -1;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item {
            padding: 10px 20px;
        }

        .stat-num {
            font-size: 46px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px 20px;
            }
            .stat-num {
                font-size: 36px;
            }
        }

        /* ===== 实用建议 ===== */
        .tips-section {
            padding: 90px 0;
        }

        .tips-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .tips-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .tips-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .tips-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .tips-content > p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 26px;
            line-height: 1.8;
        }

        .tips-list {
            display: grid;
            gap: 18px;
        }

        .tips-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--bg-soft);
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            transition: all 0.3s;
        }

        .tips-item:hover {
            border-color: var(--accent);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .tips-item i {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .tips-item h4 {
            font-size: 15px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 4px;
        }

        .tips-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media (max-width: 992px) {
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .tips-visual img {
                height: 280px;
            }
        }

        @media (max-width: 768px) {
            .tips-section {
                padding: 60px 0;
            }
            .tips-content h2 {
                font-size: 26px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 90px 0;
            background: var(--bg-soft);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .faq-item.open {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            transition: color 0.3s;
        }

        .faq-question:hover {
            color: var(--accent-hover);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            transition: all 0.35s ease;
        }

        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        @media (max-width: 768px) {
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 14px;
            }
            .faq-answer-inner {
                padding: 0 18px 18px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            text-align: center;
            isolation: isolate;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 19, 32, 0.92), rgba(23, 29, 48, 0.82));
            z-index: -1;
        }

        .cta-inner {
            max-width: 640px;
            margin: 0 auto;
            color: #fff;
        }

        .cta-inner h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 18px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            margin-bottom: 36px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 70px 0;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 30px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 18px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 340px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.05em;
        }

        .footer-links {
            display: grid;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.3s;
        }

        .footer-links a i {
            font-size: 11px;
            color: var(--accent);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 768px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding-bottom: calc(30px + var(--tabbar-h));
            }
        }

        /* ===== 动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
            .reveal {
                opacity: 1;
                transform: none;
            }
        }

        /* ===== 其它响应式断点 ===== */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 16px;
            }
            .nav-link {
                padding: 8px 14px;
                font-size: 14px;
            }
            .logo-text {
                font-size: 17px;
            }
        }

        @media (max-width: 992px) {
            .main-nav,
            .header-link {
                display: none;
            }
            .site-header {
                background: rgba(255, 255, 255, 0.98);
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .banner-actions .btn {
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #16213e;
            --primary-light: #1f2f52;
            --primary-dark: #0d1526;
            --accent: #e8a735;
            --accent-hover: #d4941e;
            --accent-soft: rgba(232, 167, 53, 0.12);
            --bg: #f4f6fb;
            --bg-alt: #ffffff;
            --bg-dark: #0f1a2f;
            --card-bg: #ffffff;
            --text-main: #1a2233;
            --text-body: #2c3852;
            --text-weak: #6b7a95;
            --border-line: #e3e8f2;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(22, 33, 62, 0.06);
            --shadow-md: 0 6px 24px rgba(22, 33, 62, 0.10);
            --shadow-hover: 0 12px 36px rgba(22, 33, 62, 0.16);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .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(--border-line);
            box-shadow: 0 2px 12px rgba(22, 33, 62, 0.04);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 22px;
            box-shadow: 0 4px 12px rgba(22, 33, 62, 0.25);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 2px;
            position: relative;
            letter-spacing: 0.3px;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }

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

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #f5b94e);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 50px;
            box-shadow: 0 4px 14px rgba(232, 167, 53, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 167, 53, 0.4);
        }

        /* Mobile Tabbar */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            z-index: 120;
            width: 100%;
            background: #ffffff;
            border-top: 1px solid var(--border-line);
            box-shadow: 0 -4px 20px rgba(22, 33, 62, 0.08);
            padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
            justify-content: space-around;
        }

        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 6px 12px;
            border-radius: 12px;
            font-size: 11px;
            color: var(--text-weak);
            transition: var(--transition);
            min-width: 60px;
        }

        .tab-item i {
            font-size: 20px;
        }

        .tab-item.active,
        .tab-item:hover {
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* ===== Page Hero / Banner ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(120deg, rgba(15, 26, 47, 0.92), rgba(31, 47, 82, 0.78));
            color: #fff;
            text-align: center;
            padding: 88px 0 72px;
            overflow: hidden;
        }

        .page-banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(232, 167, 53, 0.15), transparent 40%);
            z-index: 1;
        }

        .page-banner-content {
            position: relative;
            z-index: 2;
        }

        .page-banner .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 18px;
            border-radius: 50px;
            backdrop-filter: blur(8px);
        }

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

        .breadcrumb span {
            color: rgba(255, 255, 255, 0.4);
        }

        .page-banner-title {
            font-size: clamp(30px, 5vw, 48px);
            font-weight: 900;
            letter-spacing: 2px;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .page-banner-subtitle {
            font-size: clamp(15px, 2vw, 18px);
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            font-weight: 300;
            line-height: 1.7;
        }

        .banner-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), #f5b94e);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 32px;
            border-radius: 50px;
            box-shadow: 0 6px 18px rgba(232, 167, 53, 0.35);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(232, 167, 53, 0.45);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 15px;
            padding: 14px 32px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
        }

        .btn-outline-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 88px 0;
        }

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

        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 5px 16px;
            border-radius: 50px;
            letter-spacing: 1px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: clamp(26px, 3.6vw, 36px);
            font-weight: 900;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== Guide Topic Cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .topic-card {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-lg);
            padding: 34px 26px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .topic-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), #f5b94e);
            transform: scaleX(0);
            transition: transform 0.4s ease;
            border-radius: 0 0 4px 4px;
        }

        .topic-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .topic-card:hover::before {
            transform: scaleX(1);
        }

        .topic-icon {
            width: 68px;
            height: 68px;
            border-radius: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 20px;
            box-shadow: 0 6px 18px rgba(22, 33, 62, 0.2);
        }

        .topic-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== Guide Cards ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-line);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .guide-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .guide-cover {
            position: relative;
            height: 210px;
            overflow: hidden;
        }

        .guide-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .guide-card:hover .guide-cover img {
            transform: scale(1.06);
        }

        .guide-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(22, 33, 62, 0) 0%, rgba(22, 33, 62, 0.45) 100%);
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .guide-card:hover .guide-cover::after {
            opacity: 1;
        }

        .guide-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
        }

        .guide-body {
            padding: 24px;
        }

        .guide-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }

        .guide-card:hover .guide-body h3 {
            color: var(--accent);
        }

        .guide-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
            margin-bottom: 18px;
        }

        .guide-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-line);
            font-size: 12px;
            color: var(--text-weak);
        }

        .guide-meta .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            transition: var(--transition);
        }

        .guide-meta .read-more:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .guide-meta i {
            color: var(--accent);
        }

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, var(--primary-light));
            color: #fff;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(232, 167, 53, 0.08);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .stat-item {
            padding: 24px 12px;
        }

        .stat-number {
            font-size: clamp(32px, 4vw, 46px);
            font-weight: 900;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .step-item {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--accent);
            font-size: 22px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 6px 16px rgba(22, 33, 62, 0.2);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
        }

        /* ===== Reviews ===== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .review-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-line);
            padding: 30px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

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

        .review-card::before {
            content: '\201C';
            font-size: 64px;
            color: var(--accent);
            opacity: 0.25;
            line-height: 1;
            display: block;
            margin-bottom: 8px;
            font-family: Georgia, serif;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-top: 16px;
            border-top: 1px solid var(--border-line);
        }

        .review-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #f5b94e);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .review-author-info {
            font-size: 13px;
        }

        .review-author-info strong {
            display: block;
            color: var(--primary);
            font-weight: 600;
        }

        .review-author-info span {
            color: var(--text-weak);
            font-size: 12px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-alt);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(232, 167, 53, 0.4);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-question i {
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(120deg, var(--primary) 0%, var(--primary-dark) 60%);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 480px;
            height: 200px;
            background: radial-gradient(ellipse, rgba(232, 167, 53, 0.18), transparent 70%);
            border-radius: 50%;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 2;
            color: #fff;
            max-width: 620px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: clamp(26px, 3.6vw, 38px);
            font-weight: 900;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .cta-text {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 36px;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-cta-main {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            padding: 14px 36px;
            border-radius: 50px;
            box-shadow: 0 8px 24px rgba(232, 167, 53, 0.35);
            transition: var(--transition);
        }

        .btn-cta-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(232, 167, 53, 0.45);
        }

        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 36px;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition);
        }

        .btn-cta-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 80px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 28px;
        }

        .footer-brand .logo {
            margin-bottom: 18px;
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 340px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
        }

        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            right: 30px;
            bottom: 100px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 99;
        }

        .back-top.show {
            opacity: 1;
            visibility: visible;
        }

        .back-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
        }

        /* ===== Reveal animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .review-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .main-nav {
                gap: 20px;
            }

            .nav-link {
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                position: sticky;
            }

            .navbar {
                height: 64px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .logo-text {
                font-size: 17px;
            }

            .main-nav {
                display: none;
            }

            .header-cta {
                display: none;
            }

            .mobile-tabbar {
                display: flex;
            }

            .site-footer {
                padding-bottom: 100px;
            }

            .section {
                padding: 60px 0;
            }

            .page-banner {
                padding: 56px 0 48px;
            }

            .page-banner-title {
                font-size: 32px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .guide-cover {
                height: 180px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .btn-primary,
            .btn-outline-light {
                width: 100%;
                justify-content: center;
            }

            .cta-buttons {
                flex-direction: column;
            }

            .btn-cta-main,
            .btn-cta-outline {
                width: 100%;
                justify-content: center;
            }

            .page-banner-subtitle {
                font-size: 15px;
            }

            .section-title {
                font-size: 24px;
            }

            .back-top {
                right: 16px;
                bottom: 90px;
                width: 38px;
                height: 38px;
                font-size: 15px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #60a5fa;
  --accent: #f59e0b;
  --bg: #f1f5f9;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: all .3s ease;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Segoe UI', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}
input {
  font-family: inherit;
  outline: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 80px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 50px;
}
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(37,99,235,.06));
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 100px;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -1px;
  margin-bottom: 10px;
}
.section-header p {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn:focus {
  outline: 3px solid rgba(37,99,235,.4);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}
.btn-light {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
}
.btn-light:hover {
  background: rgba(255,255,255,.9);
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.15);
  border-color: #fff;
}
.btn-sm {
  padding: 8px 20px;
  font-size: 13px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226,232,240,.8);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: .5px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-muted);
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(37,99,235,.08);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(37,99,235,.12);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Mobile Tab */
.mobile-tab-nav {
  display: none;
}

/* Page Hero */
.page-hero {
  position: relative;
  padding: 120px 0;
  background-size: cover;
  background-position: center;
  color: #fff;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15,23,42,.7), rgba(37,99,235,.35));
  border-radius: 0 0 40px 40px;
}
.page-hero .container {
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}
.hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.hero-content p {
  font-size: 18px;
  opacity: .9;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-search {
  display: flex;
  align-items: center;
  background: #fff;
  border-radius: 100px;
  padding: 6px;
  max-width: 540px;
  box-shadow: var(--shadow-lg);
}
.hero-search i {
  color: var(--text-light);
  font-size: 16px;
  padding-left: 16px;
}
.hero-search input {
  flex: 1;
  border: none;
  padding: 12px 14px;
  font-size: 15px;
  background: transparent;
  color: var(--text-main);
}
.hero-search button {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  padding: 12px 28px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.hero-search button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37,99,235,.4);
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.hero-stat {
  text-align: left;
}
.hero-stat .num {
  font-size: 24px;
  font-weight: 800;
  display: block;
}
.hero-stat .label {
  font-size: 13px;
  opacity: .8;
}

/* Service Cards */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  text-align: center;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,.25);
}
.service-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(37,99,235,.06));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 24px;
  color: var(--primary);
  transition: var(--transition);
}
.service-card:hover .service-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  transform: scale(1.05);
}
.service-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.service-link {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.service-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}

/* Stats Strip */
.stats-strip {
  background: linear-gradient(135deg, var(--bg-dark), #1e293b);
  padding: 60px 0;
  color: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--primary-light);
  letter-spacing: -1px;
}
.stat-number span {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,.7);
  margin-top: 8px;
}

/* FAQ Section */
.faq-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: start;
}
.faq-content .section-header {
  text-align: left;
  margin-bottom: 30px;
}
.faq-content .section-header h2 {
  font-size: 30px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item[open] {
  box-shadow: var(--shadow);
  border-color: rgba(37,99,235,.3);
}
.faq-item summary {
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  list-style: none;
  color: var(--text-main);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary i {
  color: var(--primary);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary i {
  transform: rotate(180deg);
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-answer {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  animation: fadeIn .4s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.faq-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 100px;
}
.faq-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: transform .5s ease;
}
.faq-image:hover img {
  transform: scale(1.03);
}
.faq-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,.4), transparent);
}

/* Process Section */
.process-section {
  background: var(--bg-white);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.process-step {
  text-align: center;
  position: relative;
  padding: 32px 24px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.process-step::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -32px;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), transparent);
  z-index: 1;
}
.process-step:last-child::before {
  display: none;
}
.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 8px 24px rgba(37,99,235,.3);
}
.step-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(245,158,11,.15), rgba(245,158,11,.08));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 22px;
  color: var(--accent);
}
.contact-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}
.contact-card p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.contact-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.contact-card a:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--bg-dark), #1e3a5f);
  padding: 80px 0;
  text-align: center;
  color: #fff;
}
.cta-content h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -1px;
}
.cta-content p {
  font-size: 16px;
  opacity: .85;
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-muted);
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .logo {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
}
.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  margin-right: 10px;
}
.footer-desc {
  margin-top: 20px;
  line-height: 1.8;
  font-size: 14px;
  color: #94a3b8;
  max-width: 360px;
}
.footer-title {
  color: #fff;
  font-size: 16px;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  color: #94a3b8;
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-links a i {
  font-size: 12px;
  margin-right: 8px;
  color: var(--primary-light);
}
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #64748b;
  flex-wrap: wrap;
  gap: 8px;
}

/* Responsive */
@media (max-width: 1024px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .process-step::before {
    display: none;
  }
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .faq-image {
    position: static;
  }
  .faq-image img {
    height: 300px;
  }
  .hero-content h1 {
    font-size: 38px;
  }
}
@media (max-width: 768px) {
  .site-header {
    height: 60px;
  }
  .header-inner {
    height: 60px;
  }
  .header-inner .main-nav {
    display: none;
  }
  .header-actions {
    display: none;
  }
  .mobile-tab-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    justify-content: space-around;
    align-items: center;
    z-index: 999;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-muted);
    padding: 6px 12px;
    border-radius: 10px;
    transition: var(--transition);
  }
  .tab-item i {
    font-size: 18px;
  }
  .tab-item:hover,
  .tab-item.active {
    color: var(--primary);
  }
  .tab-item.active {
    font-weight: 600;
  }
  body {
    padding-bottom: 64px;
  }
  .page-hero {
    padding: 80px 0;
  }
  .page-hero::before {
    border-radius: 0 0 24px 24px;
  }
  .hero-content h1 {
    font-size: 30px;
  }
  .hero-content p {
    font-size: 15px;
  }
  .hero-search {
    flex-direction: column;
    border-radius: 20px;
    padding: 12px;
    gap: 8px;
  }
  .hero-search i {
    display: none;
  }
  .hero-search input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
  }
  .hero-search button {
    width: 100%;
    padding: 12px;
  }
  .hero-stats {
    gap: 20px;
  }
  .section {
    padding: 60px 0;
  }
  .section-header h2 {
    font-size: 26px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-number {
    font-size: 30px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .hero-content h1 {
    font-size: 26px;
  }
  .hero-stat .num {
    font-size: 18px;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .cta-content h2 {
    font-size: 26px;
  }
  .logo-text {
    font-size: 17px;
  }
  .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 16px;
    border-radius: 10px;
  }
}