/* roulang page: index */
:root {
            --primary: #E43F1A;
            --primary-hover: #C53716;
            --primary-light: rgba(228, 63, 26, 0.1);
            --dark: #1B1E2F;
            --bg: #F9FAFB;
            --card-bg: #FFFFFF;
            --card-bg-alt: #F3F4F6;
            --text: #0F1117;
            --text-secondary: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #F3F4F6;
            --success: #10B981;
            --warning: #F59E0B;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
            --transition: 0.2s ease;
            --transition-slow: 0.3s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "SF Mono", monospace;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            transition: all 0.25s ease;
        }
        button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(229,231,235,0.6);
            z-index: 1000;
            display: flex;
            align-items: center;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo a {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            white-space: nowrap;
            transition: color var(--transition);
            padding: 4px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .status-badge {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--success);
            font-weight: 500;
            white-space: nowrap;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse 1.8s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            line-height: 1.4;
            white-space: nowrap;
            transition: all 0.25s ease;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: var(--radius-sm);
        }
        .btn-nav {
            background: var(--primary);
            color: #fff;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-sm);
        }
        .btn-nav:hover {
            background: var(--primary-hover);
            color: #fff;
        }
        .badge-pill {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            background: var(--warning);
            color: #fff;
            white-space: nowrap;
        }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            padding: 6px;
            cursor: pointer;
        }

        /* 移动端抽屉菜单 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: #fff;
            border-bottom: 1px solid var(--border);
            z-index: 999;
            flex-direction: column;
            padding: 16px 0;
            box-shadow: var(--shadow-md);
        }
        .mobile-drawer.open {
            display: flex;
        }
        .mobile-drawer a {
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-drawer a:last-child {
            border-bottom: none;
        }
        .mobile-drawer .btn-nav {
            margin: 8px 24px;
            text-align: center;
        }

        /* 板块通用 */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-alt {
            background: var(--card-bg-alt);
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 12px;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 48px;
            max-width: 640px;
        }
        .text-center {
            text-align: center;
        }
        .section-title.text-center,
        .section-subtitle.text-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* Hero */
        #hero {
            padding-top: 120px;
            padding-bottom: 80px;
            background: linear-gradient(180deg, #fff 0%, var(--bg) 100%);
            min-height: 80vh;
            display: flex;
            align-items: center;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.5px;
            color: var(--text);
            margin-bottom: 16px;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .trust-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .trust-item {
            white-space: nowrap;
        }
        .hero-image {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            height: 400px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .hero-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(228,63,26,0.08) 0%, rgba(27,30,47,0.2) 100%);
            border-radius: var(--radius-lg);
        }

        /* 指标看板 */
        #metrics {
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            cursor: default;
        }
        .metric-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary);
        }
        .metric-value {
            font-family: var(--font-num);
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
            animation: countUp 0.8s ease-out;
        }
        .metric-value.green {
            color: var(--success);
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* 服务矩阵 */
        #services {
            background: var(--bg);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .service-card:nth-child(odd) {
            background: var(--card-bg-alt);
        }
        .service-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .service-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: 24px;
            margin-bottom: 20px;
        }
        .service-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .service-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
        }
        .service-link:hover {
            color: var(--primary-hover);
        }

        /* 对比表 */
        #comparison {
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 16px;
            font-size: 15px;
        }
        .comparison-table th {
            font-weight: 600;
            padding: 16px 20px;
            font-size: 16px;
            border-bottom: 2px solid var(--border);
            text-align: left;
            color: var(--text);
        }
        .comparison-table td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
        }
        .comparison-table tr.win td {
            background: #FEF3F2;
            color: var(--primary);
            font-weight: 600;
        }
        .comparison-table tr.lose td {
            background: #F9FAFB;
            color: var(--text-muted);
        }
        .comparison-accordion {
            display: none;
        }

        /* FAQ */
        #faq {
            background: var(--bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 0;
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            background: none;
            border: none;
            text-align: left;
            cursor: pointer;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            font-size: 20px;
            transition: transform 0.3s ease;
            color: var(--primary);
            min-width: 24px;
            text-align: center;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            background: var(--card-bg-alt);
            border-radius: var(--radius-sm);
            padding: 0 16px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px;
            margin-bottom: 12px;
        }
        .faq-answer p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* 联系表单 */
        #contact {
            background: var(--card-bg-alt);
            border-top: 1px solid var(--border-light);
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 420px;
            gap: 48px;
            align-items: start;
        }
        .contact-form {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .contact-form label {
            font-weight: 500;
            font-size: 14px;
            color: var(--text);
            margin-bottom: 6px;
            display: block;
        }
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            border: 1px solid #D1D5DB;
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 15px;
            transition: all var(--transition);
            background: #fff;
            margin-bottom: 18px;
            color: var(--text);
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(228,63,26,0.1);
        }
        .contact-form textarea {
            resize: vertical;
            min-height: 100px;
        }
        .contact-form .btn-submit {
            width: 100%;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .contact-form .btn-submit:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-md);
        }
        .contact-info-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            margin-bottom: 24px;
        }
        .contact-info-item i {
            font-size: 18px;
            color: var(--primary);
            width: 24px;
            text-align: center;
            margin-top: 2px;
        }
        .contact-info-item span {
            font-size: 15px;
            color: var(--text);
            line-height: 1.6;
        }
        .contact-qr {
            width: 100px;
            height: 100px;
            background: var(--card-bg-alt);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 16px 0;
            color: var(--text-muted);
            font-size: 12px;
            border: 1px solid var(--border);
        }
        .social-icons {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: all var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary);
            color: #fff;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: var(--text-muted);
            padding: 48px 0 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
            gap: 40px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-desc {
            line-height: 1.7;
            margin-bottom: 12px;
            color: var(--text-muted);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            padding: 4px 0;
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 32px;
            padding-top: 16px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 36px; }
            .hero-desc { font-size: 16px; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .contact-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-right .status-badge, .nav-right .badge-pill { display: none; }
            .hamburger { display: block; }
            .hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .hero-title { font-size: 32px; }
            .hero-image { height: 280px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; text-align: center; }
            .metrics-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .metric-value { font-size: 34px; }
            .services-grid { grid-template-columns: 1fr; }
            .comparison-accordion { display: block; }
            .comparison-table { display: none; }
            .contact-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .section { padding: 56px 0; }
            #hero { padding-top: 100px; padding-bottom: 56px; }
            .container-wrapper { padding-left: 16px; padding-right: 16px; }
            .contact-form { padding: 24px; }
            .contact-info-card { padding: 24px; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 28px; }
            .metrics-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 24px; }
        }

        /* 对比手风琴 */
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .accordion-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            font-weight: 600;
            font-size: 15px;
            background: #fff;
            cursor: pointer;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .accordion-header:hover { background: var(--card-bg-alt); }
        .accordion-header.win { background: #FEF3F2; color: var(--primary); }
        .accordion-header.lose { background: #F9FAFB; color: var(--text-muted); }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .accordion-item.open .accordion-body {
            max-height: 200px;
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
        }