/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4FBE;
            --primary-light: #EFF4FD;
            --accent: #14B8A6;
            --bg-light: #F5F9FE;
            --bg-white: #FFFFFF;
            --text-main: #1F2937;
            --text-sub: #6B7280;
            --text-weak: #9CA3AF;
            --border: #E5EAF2;
            --dark-bg: #0F172A;
            --font-main: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Helvetica Neue", sans-serif;
            --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
            --max-width: 1200px;
            --transition: 0.25s ease;
        }

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

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

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: var(--font-main);
            font-size: 16px;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: 68px;
            transition: background 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
        }

        .nav-main {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }

        .nav-right {
            justify-content: flex-end;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo i {
            color: var(--primary);
            font-size: 24px;
        }

        .nav-link {
            display: inline-block;
            padding: 6px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 6px;
            position: relative;
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.2s ease;
        }

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

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

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

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

        .nav-toggle {
            display: none;
            background: none;
            cursor: pointer;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            margin: 3px 0;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(245, 249, 254, 0.98);
            z-index: 2000;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 24px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu a.mobile-link {
            font-size: 20px;
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 20px;
        }

        .mobile-menu a.mobile-link:hover {
            color: var(--primary);
        }

        .mobile-menu-close {
            position: absolute;
            top: 20px;
            right: 24px;
            background: none;
            font-size: 28px;
            color: var(--text-main);
            cursor: pointer;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

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

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(180deg, rgba(245, 249, 254, 0.92) 0%, rgba(255, 255, 255, 0.86) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px 0 64px;
            overflow: hidden;
        }

        .hero-deco {
            position: absolute;
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-deco-1 {
            width: 320px;
            height: 320px;
            background: rgba(37, 99, 235, 0.06);
            top: -80px;
            right: -40px;
        }

        .hero-deco-2 {
            width: 180px;
            height: 180px;
            border: 2px solid rgba(20, 184, 166, 0.08);
            bottom: 20px;
            left: 15%;
            animation: floatSlow 12s ease-in-out infinite;
        }

        .hero-deco-3 {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.08);
            top: 30%;
            left: 8%;
            transform: rotate(24deg);
            animation: floatSlow 10s ease-in-out infinite alternate;
        }

        @keyframes floatSlow {
            0%,
            100% {
                transform: translateY(0) rotate(0deg);
            }
            50% {
                transform: translateY(-16px) rotate(6deg);
            }
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: var(--bg-white);
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 24px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-sub);
            max-width: 640px;
            margin: 0 auto 28px;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            padding: 0 28px;
            height: 44px;
            border-radius: 10px;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
            border: none;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:active {
            transform: translateY(1px) scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-size: 16px;
            font-weight: 500;
            padding: 0 28px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: background 0.2s ease, transform 0.15s ease;
        }

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

        .btn-outline:active {
            transform: translateY(1px) scale(0.98);
        }

        .btn:focus-visible,
        .nav-toggle:focus-visible,
        .nav-link:focus-visible,
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.35);
            outline-offset: 2px;
        }

        .hero-stats {
            margin-top: 48px;
            display: flex;
            justify-content: center;
            gap: 40px;
            font-size: 13px;
            color: var(--text-weak);
            flex-wrap: wrap;
            opacity: 0.8;
        }

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

        .hero-stats i {
            color: var(--primary);
            font-size: 12px;
        }

        /* Metrics */
        .metrics {
            background: var(--bg-light);
            padding: 64px 0 0;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: box-shadow 0.2s ease;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .metric-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--text-sub);
        }

        .metric-value {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 600;
            color: var(--text-main);
            font-variant-numeric: tabular-nums;
        }

        .metric-value.accent {
            color: var(--accent);
        }

        .metric-trend {
            font-size: 12px;
            color: var(--text-weak);
        }

        .metric-trend i {
            font-size: 11px;
            margin-right: 4px;
            color: var(--accent);
        }

        /* Section */
        .section {
            background: var(--bg-white);
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 640px;
            margin: 0 auto;
        }

        /* Services */
        .services {
            padding: 80px 0 0;
        }

        .services-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            grid-template-areas:
                "lg s1"
                "lg s2"
                "lg s3";
            gap: 24px;
        }

        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
            transition: box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .service-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.25);
        }

        .service-card-lg {
            grid-area: lg;
            background: linear-gradient(135deg, #F8FBFF 0%, #FFFFFF 50%, #F5F9FE 100%);
        }

        .service-num {
            position: absolute;
            top: 16px;
            right: 20px;
            font-family: var(--font-num);
            font-size: 40px;
            font-weight: 700;
            color: var(--primary);
            opacity: 0.08;
            line-height: 1;
        }

        .service-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 20px;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .service-card:hover .service-icon {
            background: var(--primary);
            color: #fff;
        }

        .service-card h3 {
            font-size: 22px;
            font-weight: 500;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .service-card-lg h3 {
            font-size: 26px;
        }

        .service-card-lg p {
            font-size: 15px;
        }

        .service-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            transition: gap 0.2s ease;
        }

        .service-link:hover {
            gap: 10px;
        }

        .service-link i {
            font-size: 12px;
        }

        /* Comparison */
        .comparison {
            padding: 96px 0 0;
            background: var(--bg-white);
        }

        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 64px;
            align-items: center;
        }

        .comparison-text h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 16px;
        }

        .comparison-text>p {
            font-size: 16px;
            color: var(--text-sub);
            margin-bottom: 24px;
        }

        .check-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .check-list li i {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .comparison-chart {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .chart-group {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
        }

        .chart-label {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .bar-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }

        .bar-row:last-child {
            margin-bottom: 0;
        }

        .bar-name {
            width: 90px;
            font-size: 12px;
            color: var(--text-sub);
            flex-shrink: 0;
            text-align: right;
        }

        .bar-track {
            flex: 1;
            height: 36px;
            background: #E9EFF8;
            border-radius: 8px;
            overflow: hidden;
        }

        .bar-fill {
            height: 100%;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-right: 12px;
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            font-family: var(--font-num);
            min-width: 50px;
            transition: width 0.6s ease;
        }

        .bar-fill.primary-bar {
            background: var(--primary);
        }

        .bar-fill.baseline-bar {
            background: #A6B4CC;
        }

        .chart-note {
            font-size: 12px;
            color: var(--text-weak);
            text-align: right;
            margin-top: 4px;
        }

        /* News */
        .news-section {
            padding: 80px 0 0;
        }

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

        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow 0.25s ease, transform 0.2s ease;
            display: flex;
            flex-direction: column;
        }

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

        .news-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-light);
        }

        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .news-content {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-cat {
            display: inline-block;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 999px;
            padding: 3px 12px;
            margin-bottom: 10px;
        }

        .news-content h3 {
            font-size: 18px;
            font-weight: 500;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .news-content h3 a:hover {
            color: var(--primary);
        }

        .news-content p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        .news-meta a {
            color: var(--primary);
            font-weight: 500;
            font-size: 13px;
        }

        .news-empty {
            grid-column: 1 / -1;
            padding: 48px 24px;
            background: var(--bg-light);
            border: 2px dashed var(--border);
            border-radius: var(--radius-md);
            text-align: center;
            color: var(--text-weak);
            font-size: 15px;
        }

        .news-empty i {
            font-size: 28px;
            display: block;
            margin-bottom: 8px;
            color: var(--text-weak);
        }

        /* FAQ */
        .faq-section {
            padding: 80px 0 0;
            background: var(--bg-light);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 0;
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
        }

        .faq-q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-question h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            flex: 1;
            line-height: 1.5;
        }

        .faq-toggle {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-sub);
            flex-shrink: 0;
            transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px 62px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
        }

        /* Contact Form */
        .contact-section {
            padding: 96px 0 0;
        }

        .contact-wrapper {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 64px;
            padding: 48px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .contact-info h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .contact-info>p {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .contact-methods {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .contact-method {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-main);
        }

        .contact-method i {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

        .contact-form-wrap {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 0 14px;
            font-size: 15px;
            color: var(--text-main);
            background: var(--bg-white);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .form-group textarea {
            height: 100px;
            padding: 12px 14px;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .privacy-check {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-sub);
            cursor: pointer;
        }

        .privacy-check input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--primary);
            cursor: pointer;
        }

        .form-submit {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .form-success {
            display: none;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent);
        }

        .form-success.show {
            display: flex;
        }

        .form-success i {
            font-size: 20px;
        }

        /* Footer */
        .site-footer {
            background: var(--dark-bg);
            color: #94A3B8;
            margin-top: 64px;
        }

        .footer-top {
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
        }

        .footer-brand .footer-logo {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo i {
            color: var(--primary);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #94A3B8;
        }

        .footer-contact li i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom span {
            display: inline-block;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .hero h1 {
                font-size: 36px;
            }

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

            .services-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-areas:
                    "lg lg"
                    "s1 s2"
                    "s3 s3";
            }

            .service-card-lg {
                grid-area: lg;
            }

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

            .comparison-wrapper {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .contact-wrapper {
                grid-template-columns: 1fr;
                gap: 40px;
                padding: 32px;
            }

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

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
            }

            .nav-main {
                justify-content: space-between;
            }

            .hero {
                padding: 80px 0 48px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

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

            .hero-stats {
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }

            .metrics {
                padding: 48px 0 0;
            }

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

            .metric-card {
                padding: 16px;
            }

            .metric-value {
                font-size: 22px;
            }

            .services-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "lg"
                    "s1"
                    "s2"
                    "s3";
            }

            .service-card-lg {
                grid-area: lg;
            }

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

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

            .form-row {
                grid-template-columns: 1fr;
            }

            .contact-wrapper {
                padding: 24px;
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }

            .contact-wrapper {
                padding: 20px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #DBEAFE;
            --accent: #14B8A6;
            --bg: #F5F9FE;
            --white: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5EAF2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
            --font-sans: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }

        .nav-main {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            height: 68px;
        }

        .nav-left {
            position: absolute;
            left: 0;
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-right {
            position: absolute;
            right: 0;
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color 0.2s ease;
        }

        .nav-logo i {
            color: var(--primary);
            font-size: 22px;
        }

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

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            transition: color 0.2s ease;
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: width 0.2s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

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

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: transparent;
            cursor: pointer;
            position: absolute;
            right: 0;
            top: 12px;
            z-index: 1100;
            transition: background 0.2s ease;
        }

        .nav-toggle:hover {
            background: var(--primary-light);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 1px;
            background: var(--text);
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .site-header.nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .site-header.nav-open .nav-toggle span:nth-child(2) {
            opacity: 0;
        }

        .site-header.nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 32px 0 80px;
            background: var(--bg);
            min-height: 70vh;
        }

        .article-shell {
            max-width: 960px;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

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

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

        .breadcrumb-current {
            color: var(--text-secondary);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 280px;
        }

        /* Article Card */
        .article-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px 48px;
            position: relative;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .article-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .article-title {
            font-size: 44px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-muted);
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 28px;
        }

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

        .article-meta i {
            color: var(--primary);
            font-size: 14px;
            width: 16px;
            text-align: center;
        }

        .article-divider {
            height: 1px;
            background: var(--border);
            margin: 24px 0;
        }

        /* Article Body (Rich Text) */
        .article-body {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
        }

        .article-body p {
            margin-bottom: 24px;
        }

        .article-body h2 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 20px;
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 16px;
            line-height: 1.5;
        }

        .article-body img {
            max-width: 100%;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin: 24px 0;
            height: auto;
        }

        .article-body ul {
            margin: 0 0 24px;
            padding: 0;
        }

        .article-body ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 10px;
        }

        .article-body ul li::before {
            content: '';
            position: absolute;
            left: 6px;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }

        .article-body ol {
            margin: 0 0 24px;
            padding: 0;
            counter-reset: article-ol;
        }

        .article-body ol li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 10px;
            counter-increment: article-ol;
        }

        .article-body ol li::before {
            content: counter(article-ol) ".";
            position: absolute;
            left: 6px;
            top: 0;
            font-weight: 600;
            color: var(--primary);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            border-radius: var(--radius-sm);
            padding: 16px 24px;
            margin: 24px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body pre {
            background: #1F2937;
            color: #E5EAF2;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }

        .article-body code {
            background: #F1F5F9;
            color: var(--primary-dark);
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, monospace;
            padding: 2px 6px;
            border-radius: 4px;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
            display: block;
            overflow-x: auto;
        }

        .article-body th {
            background: var(--primary-light);
            color: var(--text);
            font-weight: 600;
            text-align: left;
            padding: 12px 16px;
            border: 1px solid var(--border);
        }

        .article-body td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            color: var(--text-secondary);
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid rgba(37, 99, 235, 0.3);
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .article-body a:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary-dark);
        }

        .article-body figure {
            margin: 24px 0;
        }

        .article-body figcaption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            padding: 8px 0 0;
            line-height: 1.5;
        }

        /* Article Not Found */
        .article-not-found {
            text-align: center;
            padding: 80px 40px;
            background: #F8FAFE;
            border: 1px dashed var(--border);
            border-radius: var(--radius-md);
        }

        .article-not-found i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }

        .article-not-found p {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .article-not-found a {
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color 0.2s ease;
        }

        .article-not-found a:hover {
            color: var(--primary-dark);
        }

        /* ===== Related Section ===== */
        .related-section {
            margin-top: 48px;
        }

        .related-heading {
            font-size: 24px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 24px;
            position: relative;
            padding-left: 16px;
        }

        .related-heading::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            border-radius: 2px;
            background: var(--primary);
        }

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

        .related-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.25);
        }

        .related-card a {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .related-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-light);
        }

        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-info {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-info h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
            transition: color 0.2s ease;
        }

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

        .related-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-top: auto;
        }

        /* ===== Article Back ===== */
        .article-back {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .article-back a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.2s ease, transform 0.2s ease;
        }

        .article-back a:hover {
            color: var(--primary-dark);
            transform: translateX(-4px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
            font-size: 14px;
        }

        .footer-top {
            padding-bottom: 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-logo i {
            color: #60A5FA;
            font-size: 22px;
        }

        .footer-brand p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 20px;
        }

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

        .footer-col ul li a {
            color: #94A3B8;
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #94A3B8;
            font-size: 14px;
        }

        .footer-contact i {
            color: #60A5FA;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid #1E293B;
            padding: 24px 0;
            font-size: 13px;
            color: #64748B;
            text-align: center;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

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

            .related-card:last-child {
                grid-column: span 1;
            }

            .article-main {
                padding: 24px 0 64px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }

            .nav-main {
                justify-content: space-between;
            }

            .nav-left,
            .nav-right {
                display: none;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                bottom: auto;
                flex-direction: column;
                align-items: center;
                gap: 0;
                background: rgba(255, 255, 255, 0.98);
                padding: 24px 16px;
                z-index: 999;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 30px rgba(15, 23, 42, 0.08);
            }

            .site-header.nav-open .nav-left,
            .site-header.nav-open .nav-right {
                display: flex;
            }

            .nav-left a,
            .nav-right a {
                font-size: 18px;
                padding: 14px 0;
                width: 100%;
                text-align: center;
                border-bottom: 1px solid #F0F4FA;
            }

            .nav-left a:last-child,
            .nav-right a:last-child {
                border-bottom: none;
            }

            .nav-left a::after,
            .nav-right a::after {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-logo {
                font-size: 16px;
                margin-right: auto;
                margin-left: 0;
            }

            .article-shell {
                padding: 0 12px;
            }

            .breadcrumb {
                font-size: 13px;
                margin-bottom: 20px;
            }

            .article-card {
                padding: 28px 20px 32px;
                border-radius: 12px;
            }

            .article-title {
                font-size: 28px;
                line-height: 1.35;
                margin-bottom: 16px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
                padding-bottom: 16px;
                margin-bottom: 20px;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 22px;
                margin: 28px 0 16px;
            }

            .article-body h3 {
                font-size: 19px;
                margin: 22px 0 14px;
            }

            .article-body blockquote {
                padding: 14px 16px;
                font-size: 14px;
            }

            .related-section {
                margin-top: 36px;
            }

            .related-heading {
                font-size: 20px;
                margin-bottom: 20px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-info {
                padding: 16px;
            }

            .related-info h3 {
                font-size: 16px;
            }

            .article-back {
                margin-top: 32px;
            }

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

            .footer-brand p {
                max-width: 100%;
            }

            .footer-bottom {
                padding: 20px 0;
                font-size: 12px;
                line-height: 1.6;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }

            .nav-logo {
                font-size: 15px;
                gap: 8px;
            }

            .nav-logo i {
                font-size: 18px;
            }

            .article-card {
                padding: 24px 16px 28px;
            }

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

            .article-meta {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }

            .related-info {
                padding: 14px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-darker: #1E40AF;
            --primary-light: #DBEAFE;
            --primary-lighter: #EFF6FF;
            --accent: #14B8A6;
            --bg: #F5F9FE;
            --white: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5EAF2;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 24px rgba(15, 23, 42, 0.12);
            --nav-h: 68px;
            --container: 1200px;
            --space-01: 16px;
            --space-02: 24px;
            --space-03: 32px;
            --space-04: 48px;
            --space-05: 64px;
            --space-06: 80px;
            --space-07: 96px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.4;
            color: var(--text);
        }
        h1 {
            font-size: 44px;
            font-weight: 600;
            line-height: 1.3;
        }
        h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 24px;
        }
        h3 {
            font-size: 22px;
            font-weight: 500;
            line-height: 1.5;
        }
        h4 {
            font-size: 17px;
            font-weight: 600;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            line-height: 1.4;
            transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn:active {
            transform: translateY(1px) scale(0.98);
        }
        .btn:focus-visible {
            outline: 2px solid #93C5FD;
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:active {
            background: var(--primary-darker);
        }
        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary-lighter);
            color: var(--primary-dark);
        }
        .btn-outline:focus-visible {
            outline-color: #93C5FD;
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            background: var(--primary-lighter);
            color: var(--primary-dark);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--nav-h);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow);
        }
        .nav-main {
            height: var(--nav-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            letter-spacing: 0.01em;
            flex-shrink: 0;
            line-height: 1.2;
        }
        .nav-logo i {
            font-size: 24px;
            color: var(--primary);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: width 0.2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.2s ease;
        }
        .nav-toggle:hover {
            background: var(--primary-lighter);
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform 0.2s ease, opacity 0.2s ease;
        }
        .nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-open .nav-toggle span:nth-child(2) {
            opacity: 0;
        }
        .nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 72px 0 96px;
            background: linear-gradient(rgba(245, 249, 254, 0.92), rgba(255, 255, 255, 0.82)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: -1px;
            width: 100%;
            height: 1px;
            transform: translateX(-50%);
            background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 13px;
            color: var(--primary);
            background: rgba(255, 255, 255, 0.8);
            letter-spacing: 0.02em;
            margin-bottom: 20px;
        }
        .page-hero h1 {
            margin-bottom: 12px;
            font-size: 42px;
        }
        .hero-subtitle {
            max-width: 680px;
            margin: 0 auto 28px;
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-secondary);
        }
        .hero-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-meta-line {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 48px;
            font-size: 13px;
            color: var(--text-light);
        }
        .hero-meta-line span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta-line i {
            font-size: 12px;
            color: var(--accent);
        }

        /* Intro */
        .intro-section {
            padding: var(--space-06) 0 var(--space-05);
        }
        .intro-wrap {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-content h2 {
            margin-bottom: 16px;
        }
        .intro-content p {
            margin-bottom: 16px;
            color: var(--text-secondary);
        }
        .intro-content p:last-child {
            margin-bottom: 0;
        }
        .intro-stats {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .stat-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }
        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.25);
        }
        .stat-num {
            font-size: 32px;
            font-weight: 600;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }
        .stat-label {
            display: block;
            margin-top: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* Service Grid 2x2 */
        .services-section {
            padding: var(--space-06) 0 var(--space-07);
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .services-section .container {
            max-width: 960px;
        }
        .services-section h2 {
            text-align: center;
        }
        .section-lead {
            text-align: center;
            max-width: 560px;
            margin: 0 auto 40px;
            color: var(--text-secondary);
            font-size: 16px;
        }
        .service-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .service-card {
            position: relative;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
            overflow: hidden;
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity 0.25s ease;
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.25);
            transform: translateY(-2px);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-num {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 40px;
            font-weight: 600;
            color: var(--text);
            opacity: 0.08;
            line-height: 1;
            pointer-events: none;
        }
        .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--primary-lighter);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
            transition: background 0.2s ease, color 0.2s ease;
        }
        .service-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .service-card h3 {
            margin-bottom: 8px;
            font-size: 20px;
        }
        .service-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s ease;
        }
        .card-link:hover {
            gap: 8px;
            color: var(--primary-dark);
        }

        /* Evolution */
        .evolution-section {
            padding: var(--space-07) 0 var(--space-06);
        }
        .evolution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .evolution-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
        }
        .evolution-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .evolution-image::after {
            content: "";
            position: absolute;
            inset: 0;
            border: 1px solid rgba(37, 99, 235, 0.15);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }
        .evolution-content h2 {
            margin-bottom: 16px;
        }
        .evolution-content p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .evolution-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text);
        }
        .list-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
            margin-top: 10px;
        }

        /* FAQ */
        .faq-section {
            padding: var(--space-06) 0 var(--space-07);
            background: var(--white);
            border-top: 1px solid var(--border);
        }
        .faq-section .container {
            max-width: 960px;
        }
        .faq-section h2 {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            align-items: start;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
        }
        .faq-item.active {
            border-color: var(--primary);
            background: #FBFDFF;
            box-shadow: var(--shadow-hover);
        }
        .faq-q {
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .faq-q h4 {
            flex: 1;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            margin: 0;
        }
        .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.25s ease, border-color 0.2s ease, background 0.2s ease;
            flex-shrink: 0;
            position: relative;
        }
        .faq-toggle::before,
        .faq-toggle::after {
            content: "";
            position: absolute;
            background: var(--text-secondary);
            border-radius: 2px;
            transition: background 0.2s ease;
        }
        .faq-toggle::before {
            width: 12px;
            height: 2px;
        }
        .faq-toggle::after {
            width: 2px;
            height: 12px;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            border-color: var(--primary);
            background: var(--primary-lighter);
        }
        .faq-item.active .faq-toggle::before,
        .faq-item.active .faq-toggle::after {
            background: var(--primary);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 0 0 40px;
        }
        .faq-item.active .faq-a {
            max-height: 300px;
            padding-top: 12px;
        }
        .faq-a p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* CTA */
        .cta-section {
            padding: var(--space-07) 0 var(--space-05);
            background: var(--bg);
            border-top: 1px solid var(--border);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary-lighter), #F0F7FE);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.06);
        }
        .cta-box h2 {
            margin-bottom: 8px;
        }
        .cta-box p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #0E1526;
            color: #94A3B8;
            padding: 56px 0 0;
        }
        .footer-top {
            padding-bottom: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-logo i {
            font-size: 24px;
            color: #60A5FA;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: grid;
            gap: 10px;
        }
        .footer-col ul li a {
            color: #94A3B8;
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #94A3B8;
        }
        .footer-contact li i {
            color: #60A5FA;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        /* Mobile nav */
        @media (max-width: 1023px) {
            .nav-left,
            .nav-right {
                gap: 18px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-link {
                font-size: 14px;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-main {
                flex-wrap: wrap;
                align-items: center;
            }
            .nav-logo {
                order: 1;
                flex: 1;
                font-size: 16px;
                justify-content: flex-start;
            }
            .nav-toggle {
                order: 2;
                display: flex;
            }
            .nav-left,
            .nav-right {
                display: none;
                width: 100%;
                order: 3;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding: 16px 0 20px;
            }
            .nav-open .nav-left,
            .nav-open .nav-right {
                display: flex;
            }
            .nav-link {
                font-size: 18px;
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid var(--border);
            }
            .nav-link:last-child {
                border-bottom: none;
            }
            .nav-link::after {
                display: none;
            }
            h1 {
                font-size: 32px;
            }
            h2 {
                font-size: 26px;
            }
            .page-hero {
                padding: 48px 0 64px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-cta {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 320px;
            }
            .intro-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .evolution-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .evolution-image img {
                height: 240px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                text-align: center;
            }
            .intro-stats {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .intro-stats {
                grid-template-columns: 1fr;
            }
            .hero-meta-line {
                flex-direction: column;
                gap: 8px;
                align-items: center;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category1 */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #DBEAFE;
    --primary-soft: #EFF6FF;
    --accent: #14B8A6;
    --bg: #F5F9FE;
    --white: #FFFFFF;
    --text: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: #E5EAF2;
    --dark: #0F172A;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
    --space-md: 24px;
    --space-lg: 48px;
    --space-xl: 80px;
    --font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease, background 0.2s ease;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 24px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
    border: 1px solid transparent;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

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

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

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background: var(--primary-soft);
    border-color: var(--primary-dark);
    color: var(--primary-dark);
}

.btn-outline-light {
    background: transparent;
    border-color: rgba(255,255,255,0.6);
    color: #FFFFFF;
}

.btn-outline-light:hover {
    background: rgba(255,255,255,0.12);
    border-color: #FFFFFF;
    color: #FFFFFF;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.86);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
    background: rgba(255,255,255,0.98);
    box-shadow: 0 4px 16px rgba(15,23,42,0.06);
}

.nav-main {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 68px;
    gap: 24px;
}

.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    padding: 6px 2px;
    line-height: 1;
    white-space: nowrap;
    transition: color 0.2s ease;
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: width 0.2s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
}

.nav-logo i {
    color: var(--primary);
    font-size: 22px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    border-radius: 10px;
    background: var(--primary-soft);
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: background 0.2s ease;
}

.nav-toggle:hover span {
    background: var(--primary);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.open {
    opacity: 1;
    visibility: visible;
}

.mobile-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--white);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-sm);
    transition: background 0.2s ease, color 0.2s ease;
}

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

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding: 24px;
}

.mobile-nav-link {
    font-size: 20px;
    font-weight: 500;
    color: var(--text);
    padding: 12px 32px;
    display: block;
    border-radius: 12px;
    transition: background 0.2s ease, color 0.2s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

.section-pad {
    padding: var(--space-xl) 0;
}

.section-title {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 680px;
    margin-bottom: 48px;
    line-height: 1.7;
}

/* ===== Hero ===== */
.cat-hero {
    background: linear-gradient(128deg, #EFF6FF 0%, #F5F9FE 56%, #E0F2FE 100%);
    position: relative;
    overflow: hidden;
    padding: 96px 0 80px;
}

.cat-hero::before {
    content: "";
    position: absolute;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: rgba(37,99,235,0.06);
    top: -140px;
    right: 8%;
    animation: floatElement 8s ease-in-out infinite;
}

.cat-hero::after {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(20,184,166,0.05);
    bottom: -100px;
    left: 4%;
    animation: floatElement 10s ease-in-out infinite reverse;
}

@keyframes floatElement {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

.hero-layout {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid rgba(37,99,235,0.35);
    background: rgba(255,255,255,0.6);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: 20px;
}

.cat-hero h1 {
    font-size: 44px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

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

.hero-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
}

.hero-float-card {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(255,255,255,0.94);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
}

.hero-float-card i {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.hero-float-card span {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.2;
}

.hero-float-card strong {
    display: block;
    font-size: 16px;
    color: var(--text);
    line-height: 1.3;
}

/* ===== Overview ===== */
.overview-section {
    padding: 80px 0 16px;
}

.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.overview-text h2 {
    margin-bottom: 24px;
}

.overview-text p {
    margin-bottom: 24px;
    color: var(--text-secondary);
    line-height: 1.9;
}

.overview-text p strong {
    color: var(--text);
}

.overview-media {
    position: relative;
}

.overview-media img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.overview-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    padding: 10px 18px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.overview-tag i {
    color: var(--accent);
    font-size: 16px;
}

/* ===== Services ===== */
.services-section {
    padding: 80px 0;
    background: var(--white);
}

.services-section .section-desc {
    margin-bottom: 48px;
}

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

.service-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(37,99,235,0.4);
}

.service-card-lg {
    grid-column: span 2;
}

.service-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 20px;
    transition: background 0.2s ease, color 0.2s ease;
}

.service-card:hover .service-icon {
    background: var(--primary);
    color: #fff;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 500;
    line-height: 1.5;
    color: var(--text);
    margin-bottom: 12px;
}

.service-card > p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 8px;
}

.service-card ul {
    margin-top: 14px;
}

.service-card ul li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 6px;
}

.service-card ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.service-num {
    position: absolute;
    top: 12px;
    right: 20px;
    font-size: 40px;
    line-height: 1;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.1;
    font-family: Inter, "Microsoft YaHei", sans-serif;
    font-variant-numeric: tabular-nums;
    pointer-events: none;
    user-select: none;
}

/* ===== Scenario ===== */
.scenario-section {
    padding: 80px 0;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.scenario-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.scenario-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary);
    transition: height 0.3s ease;
}

.scenario-card:hover {
    box-shadow: var(--shadow-lg);
}

.scenario-card:hover::before {
    height: 100%;
}

.scenario-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 20px;
    transition: background 0.2s ease, color 0.2s ease;
}

.scenario-card:hover .scenario-icon {
    background: var(--primary);
    color: #fff;
}

.scenario-card h3 {
    font-size: 20px;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 8px;
}

.scenario-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.scenario-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* ===== Process ===== */
.process-section {
    padding: 80px 0;
    background: var(--white);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.process-step {
    position: relative;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.process-step:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(37,99,235,0.35);
    transform: translateY(-4px);
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    font-family: Inter, "Microsoft YaHei", sans-serif;
    font-variant-numeric: tabular-nums;
    margin-bottom: 20px;
}

.process-step h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 80px 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.open {
    border-color: var(--primary);
    background: #FBFDFF;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    user-select: none;
}

.faq-q-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.faq-question h4 {
    flex: 1;
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.5;
}

.faq-toggle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
    transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.faq-item.open .faq-toggle {
    transform: rotate(45deg);
    border-color: var(--primary);
    background: var(--primary-light);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding-left: 52px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    max-height: 400px;
}

/* ===== CTA ===== */
.cta-block {
    padding: 64px 0;
    background: var(--dark);
    position: relative;
    overflow: hidden;
}

.cta-block::before {
    content: "";
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: rgba(37,99,235,0.18);
    top: -100px;
    right: 10%;
}

.cta-block::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(20,184,166,0.10);
    bottom: -80px;
    left: 6%;
}

.cta-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}

.cta-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.cta-content p {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    max-width: 560px;
}

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

/* ===== Footer ===== */
.site-footer {
    background: var(--dark);
    color: #fff;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-top {
    padding: 48px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
    gap: 48px;
}

.footer-brand .footer-logo {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.footer-brand .footer-logo i {
    color: #60A5FA;
    font-size: 22px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    transition: color 0.2s ease;
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-contact li {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact li i {
    color: #60A5FA;
    width: 16px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 16px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .nav-left,
    .nav-right {
        gap: 16px;
    }

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

    .nav-logo {
        font-size: 16px;
    }

    .hero-layout {
        gap: 40px;
    }

    .cat-hero h1 {
        font-size: 36px;
    }

    .overview-grid {
        gap: 40px;
    }

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

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

    .service-card-lg {
        grid-column: span 2;
    }

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

@media (max-width: 767px) {
    .nav-main {
        justify-content: space-between;
        flex-wrap: wrap;
        padding: 0 16px;
        height: 64px;
    }

    .nav-logo {
        position: static;
        transform: none;
        font-size: 17px;
    }

    .nav-left,
    .nav-right {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .cat-hero h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-img {
        border-radius: 12px;
    }

    .overview-section {
        padding: 56px 0 8px;
    }

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

    .services-section,
    .scenario-section,
    .process-section,
    .faq-section {
        padding: 56px 0;
    }

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

    .service-card-lg {
        grid-column: span 1;
    }

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

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

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

    .section-title {
        font-size: 26px;
    }

    .cta-block {
        padding: 48px 0;
    }

    .cta-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .cta-actions {
        width: 100%;
    }

    .cta-actions .btn {
        flex: 1;
        min-width: 130px;
    }

    .footer-top {
        padding: 40px 0 20px;
    }

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

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

    .nav-logo {
        font-size: 15px;
    }

    .nav-logo i {
        font-size: 18px;
    }

    .hero-actions .btn {
        font-size: 14px;
    }

    .service-card {
        padding: 24px 20px;
    }

    .service-card ul li {
        font-size: 13px;
    }

    .scenario-card {
        padding: 24px 20px;
    }

    .faq-item {
        padding: 20px 16px;
    }

    .faq-question h4 {
        font-size: 15px;
    }

    .faq-answer {
        padding-left: 0;
    }

    .cta-content h3 {
        font-size: 20px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* roulang page: category3 */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #EFF6FF;
  --accent: #14B8A6;
  --bg-soft: #F5F9FE;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border: #E5EAF2;
  --white: #FFFFFF;
  --footer-bg: #0F172A;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
  --container: 1200px;
  --space-16: 16px;
  --space-24: 24px;
  --space-32: 32px;
  --space-48: 48px;
  --space-64: 64px;
  --space-80: 80px;
  --space-96: 96px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input, textarea {
  font-family: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (max-width: 1023px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}
@media (max-width: 767px) {
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 68px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
}
.nav-main {
  height: 68px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  position: relative;
}
.nav-left {
  display: flex;
  align-items: center;
  gap: 28px;
  justify-self: start;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
  justify-self: end;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 6px 0;
  position: relative;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transition: width 0.2s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link.active {
  color: var(--primary);
}
.nav-link.active::after {
  width: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  justify-self: center;
}
.nav-logo i {
  color: var(--primary);
  font-size: 22px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--white);
  padding: 10px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle:hover {
  border-color: var(--primary);
}
@media (max-width: 1023px) {
  .nav-left, .nav-right {
    gap: 18px;
  }
  .nav-logo {
    font-size: 17px;
  }
}
@media (max-width: 767px) {
  .nav-main {
    grid-template-columns: 1fr auto;
    gap: 8px;
  }
  .nav-logo {
    justify-self: start;
    font-size: 16px;
  }
  .nav-left, .nav-right {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 4px;
    padding: 12px 0;
  }
  .nav-left {
    order: 3;
    grid-column: 1 / -1;
    border-top: 1px solid var(--border);
  }
  .nav-right {
    order: 4;
    grid-column: 1 / -1;
  }
  .nav-toggle {
    display: flex;
    justify-self: end;
  }
  .site-header.nav-open {
    background: var(--white);
  }
  .site-header.nav-open .nav-left,
  .site-header.nav-open .nav-right {
    display: flex;
  }
  .nav-link {
    font-size: 20px;
    padding: 10px 0;
    width: 100%;
  }
  .nav-link::after {
    display: none;
  }
  .site-header.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .site-header.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  .site-header.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(245, 249, 254, 0.96) 0%, rgba(239, 246, 255, 0.88) 50%, rgba(37, 99, 235, 0.18) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  padding: 96px 0 64px;
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: rgba(37, 99, 235, 0.10);
  border-radius: 50%;
  filter: blur(60px);
  animation: floatOrb 10s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 10%;
  width: 220px;
  height: 220px;
  background: rgba(20, 184, 166, 0.08);
  border-radius: 50%;
  filter: blur(50px);
  animation: floatOrb 12s ease-in-out infinite alternate-reverse;
}
@keyframes floatOrb {
  0% { transform: translateY(0) scale(1); }
  100% { transform: translateY(-20px) scale(1.05); }
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin-bottom: 24px;
}
.hero-badge i {
  font-size: 12px;
}
.hero h1 {
  font-size: 44px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 12px;
}
.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 28px;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
}
.btn:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.4);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.18);
}
.btn-primary:active {
  transform: translateY(1px) scale(0.98);
}
.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary-light);
}
.btn-outline:active {
  transform: translateY(1px) scale(0.98);
}
.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(229, 234, 242, 0.8);
}
.hero-meta span {
  font-size: 13px;
  color: rgba(31, 41, 55, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-meta i {
  font-size: 12px;
  color: var(--primary);
}
@media (max-width: 767px) {
  .hero {
    padding: 64px 0 40px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .hero-meta {
    gap: 16px;
    margin-top: 32px;
  }
  .hero-meta span {
    font-size: 12px;
  }
}

/* Section */
.section {
  padding: 80px 0;
}
.section-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}
.section h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.8;
  margin-bottom: 40px;
}
@media (max-width: 767px) {
  .section {
    padding: 48px 0;
  }
  .section h2 {
    font-size: 26px;
  }
}

/* Overview */
.overview {
  background: var(--white);
  padding: 96px 0;
}
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.overview-text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
}
.overview-text p:last-of-type {
  margin-bottom: 24px;
}
.overview-list {
  display: grid;
  gap: 12px;
}
.overview-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text);
}
.overview-list li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 5px;
  flex-shrink: 0;
}
.overview-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.overview-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.overview-image::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.3);
  pointer-events: none;
}
@media (max-width: 1023px) {
  .overview {
    padding: 80px 0;
  }
  .overview-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}
@media (max-width: 767px) {
  .overview {
    padding: 48px 0;
  }
  .overview-grid {
    gap: 24px;
  }
  .overview-image {
    order: -1;
  }
}

/* Scenarios */
.scenarios {
  background: var(--bg-soft);
  padding: 96px 0;
}
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.scenario-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}
.scenario-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--primary);
  transition: height 0.3s ease;
}
.scenario-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
  transform: translateY(-2px);
}
.scenario-card:hover::before {
  height: 100%;
}
.scenario-card .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 20px;
  transition: background 0.3s ease, color 0.3s ease;
}
.scenario-card:hover .icon {
  background: var(--primary);
  color: var(--white);
}
.scenario-card h3 {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 8px;
}
.scenario-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.scenario-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  color: var(--primary);
  opacity: 0.1;
  pointer-events: none;
}
@media (max-width: 767px) {
  .scenarios {
    padding: 48px 0;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .scenario-card {
    padding: 24px;
  }
  .scenario-card h3 {
    font-size: 19px;
  }
}

/* FAQ */
.faq-section {
  background: var(--white);
  padding: 96px 0;
}
.faq-header {
  margin-bottom: 48px;
}
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
.faq-col {
  display: grid;
  gap: 16px;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  cursor: pointer;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-sm);
}
.faq-item.active {
  border-color: var(--primary);
  background: #FAFCFE;
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 32px;
}
.faq-q-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-question h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
}
.faq-toggle {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--primary);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding-left: 46px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.faq-item.active .faq-answer {
  max-height: 220px;
  padding-top: 12px;
  padding-bottom: 4px;
}
@media (max-width: 1023px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 767px) {
  .faq-section {
    padding: 48px 0;
  }
  .faq-header {
    margin-bottom: 32px;
  }
  .faq-item {
    padding: 16px;
  }
  .faq-question h4 {
    font-size: 15px;
  }
}

/* Process */
.process {
  background: var(--bg-soft);
  padding: 96px 0;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.process-step {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.process-step:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.25);
}
.process-step .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
@media (max-width: 1023px) {
  .process-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 767px) {
  .process {
    padding: 48px 0;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 24px;
  }
  .process-step {
    padding: 24px;
  }
}

/* CTA */
.cta-section {
  background: var(--white);
  padding: 96px 0;
}
.cta-box {
  background: linear-gradient(135deg, var(--bg-soft), #EFF6FF);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.cta-box h2 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
}
.cta-box p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
}
@media (max-width: 767px) {
  .cta-section {
    padding: 48px 0;
  }
  .cta-box {
    padding: 32px 20px;
  }
  .cta-box h2 {
    font-size: 26px;
  }
}

/* Footer */
.site-footer {
  background: var(--footer-bg);
  color: var(--white);
  padding-top: 64px;
  padding-bottom: 32px;
}
.footer-top {
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-logo i {
  color: #60A5FA;
  font-size: 22px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-col ul {
  display: grid;
  gap: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.2s ease;
}
.footer-col ul li a:hover {
  color: var(--white);
}
.footer-contact li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact li i {
  color: #60A5FA;
  font-size: 13px;
  width: 16px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
}
.footer-bottom span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
}
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .site-footer {
    padding-top: 48px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* roulang page: category4 */
/* ===== 设计变量 ===== */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-alpha: rgba(37, 99, 235, .08);
  --accent: #14B8A6;
  --bg: #F5F9FE;
  --bg-white: #FFFFFF;
  --text: #1F2937;
  --text-body: #374151;
  --text-muted: #6B7280;
  --text-faint: #9CA3AF;
  --border: #E5EAF2;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-lg: 0 12px 24px rgba(15, 23, 42, .12);
  --container: 1200px;
  --header-h: 68px;
  --font-main: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Inter", sans-serif;
  --transition: .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.btn i {
  margin-right: 8px;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: #1A40B4;
  transform: translateY(1px) scale(.98);
}

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

.btn-outline:hover {
  background: var(--primary-alpha);
}

.btn-outline:active {
  transform: scale(.98);
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid #93C5FD;
  outline-offset: 2px;
}

/* ===== 导航栏 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  transition: background .3s ease, box-shadow .3s ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, .97);
  box-shadow: 0 1px 10px rgba(15, 23, 42, .04);
}

.nav-main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: var(--header-h);
  gap: 24px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: .01em;
}

.nav-logo i {
  font-size: 24px;
  color: var(--primary);
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 6px;
  transition: color .2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  transform: translateX(-50%);
  transition: width .2s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 20px;
}

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

.nav-toggle {
  display: none;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: #CBD5E1;
  padding: 56px 0 0;
}

.footer-top {
  padding-bottom: 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-logo i {
  color: var(--primary);
  font-size: 22px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #94A3B8;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: #94A3B8;
  transition: color .2s ease;
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-contact li {
  font-size: 14px;
  color: #94A3B8;
}

.footer-contact li i {
  width: 20px;
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  text-align: center;
  font-size: 14px;
  color: #64748B;
}

/* ===== 分类页 Hero ===== */
.page-hero {
  position: relative;
  background: linear-gradient(90deg, #EAF2FF 0%, #F5F9FE 48%, #FFFFFF 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  background-blend-mode: overlay;
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -40px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: rgba(37, 99, 235, .06);
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: 12%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(20, 184, 166, .05);
}

.page-hero .hero-inner {
  position: relative;
  z-index: 2;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .7);
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-badge i {
  font-size: 13px;
}

.page-hero h1 {
  font-size: 44px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
}

.page-hero h1 span {
  color: var(--primary);
}

.page-hero p {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 通用板块标题 ===== */
.section-head {
  margin-bottom: 48px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 12px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 680px;
}

.section-overline {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

/* ===== 时间轴板块 ===== */
.timeline-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.timeline {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 0;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--border) 8%, var(--border) 92%, transparent);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: 64px;
}

.timeline-item:nth-child(odd) .timeline-card {
  margin-right: calc(50% + 48px);
}

.timeline-item:nth-child(even) .timeline-card {
  margin-left: calc(50% + 48px);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
}

.timeline-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: calc(50% - 48px);
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s ease, border-color .3s ease;
}

.timeline-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, .3);
}

.timeline-media {
  overflow: hidden;
  min-height: 220px;
}

.timeline-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}

.timeline-card:hover .timeline-media img {
  transform: scale(1.04);
}

.timeline-content {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.timeline-tag {
  display: inline-block;
  width: fit-content;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--primary-alpha);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}

.timeline-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.5;
}

.timeline-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ===== 价值卡片 ===== */
.value-section {
  padding: 80px 0;
  background: var(--bg);
}

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

.value-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
}

.value-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, .3);
  transform: translateY(-4px);
}

.value-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary-alpha);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 20px;
  transition: background .3s ease, color .3s ease;
}

.value-card:hover .value-icon {
  background: var(--primary);
  color: #fff;
}

.value-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.5;
}

.value-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ===== 覆盖范围 ===== */
.cover-section {
  padding: 96px 0;
  background: var(--bg-white);
}

.cover-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

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

.cover-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, .35));
}

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

.cover-media-caption {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 20px;
  z-index: 2;
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
}

.cover-list {
  display: grid;
  gap: 16px;
}

.cover-list-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color .25s ease, background .25s ease;
}

.cover-list-item:hover {
  border-color: rgba(37, 99, 235, .35);
  background: var(--bg-white);
}

.cover-list-icon {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-alpha);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 15px;
  margin-top: 4px;
}

.cover-list-item h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.5;
}

.cover-list-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0 96px;
  background: var(--bg);
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color .3s ease, box-shadow .3s ease, background .3s ease;
}

.faq-item.open {
  border-color: rgba(37, 99, 235, .4);
  box-shadow: var(--shadow-sm);
  background: #FDFEFF;
}

.faq-q {
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  user-select: none;
}

.faq-q-icon {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-q-text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
}

.faq-toggle {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 13px;
  transition: transform .3s ease, background .3s ease, border-color .3s ease;
}

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

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}

.faq-item.open .faq-a {
  max-height: 240px;
  padding-top: 14px;
}

.faq-a p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  padding-left: 46px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(30, 41, 59, .88)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  text-align: center;
  color: #fff;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
}

.cta-inner p {
  font-size: 16px;
  color: #CBD5E1;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

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

.btn-light:hover {
  background: #E2E8F0;
}

.btn-glass {
  border: 1px solid rgba(255, 255, 255, .4);
  color: #fff;
  background: rgba(255, 255, 255, .08);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, .16);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .nav-main {
    justify-content: space-between;
    gap: 12px;
  }

  .nav-left,
  .nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-white);
    margin-left: auto;
  }

  .nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s ease, opacity .3s ease;
  }

  .nav-main.open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-main.open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .nav-main.open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-main.open .nav-left,
  .nav-main.open .nav-right {
    display: flex;
    position: absolute;
    top: calc(var(--header-h) - 1px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    gap: 4px;
  }

  .nav-main.open .nav-right {
    top: auto;
    margin-top: 0;
  }

  .nav-main.open .nav-left {
    margin-top: calc(var(--header-h) - 1px);
  }

  .nav-main.open .nav-right {
    padding-top: 0;
  }

  .nav-link {
    font-size: 20px;
    padding: 10px 0;
    width: 100%;
  }

  .nav-link::after {
    display: none;
  }

  .page-hero {
    padding: 72px 0 64px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .page-hero p {
    font-size: 16px;
  }

  .timeline::before {
    left: 22px;
  }

  .timeline-item {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 48px;
  }

  .timeline-item:nth-child(odd) .timeline-card,
  .timeline-item:nth-child(even) .timeline-card {
    width: calc(100% - 56px);
    margin-left: 56px;
    margin-right: 0;
  }

  .timeline-dot {
    left: 22px;
    top: 40px;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    font-size: 11px;
  }

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

  .cover-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

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

  .timeline-section,
  .value-section,
  .cover-section,
  .faq-section,
  .cta-section {
    padding: 64px 0;
  }

  .timeline-item:nth-child(odd) .timeline-card,
  .timeline-item:nth-child(even) .timeline-card {
    width: calc(100% - 44px);
    margin-left: 44px;
  }

  .timeline-card {
    grid-template-columns: 1fr;
  }

  .timeline-media img {
    height: 180px;
  }

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

  .cover-media img {
    height: 240px;
  }

  .faq-grid {
    gap: 16px;
  }

  .faq-item {
    padding: 16px 18px;
  }

  .faq-a p {
    padding-left: 0;
  }

  .cta-inner h2 {
    font-size: 26px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-actions .btn {
    width: 100%;
  }

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

  .footer-bottom {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}