/* roulang page: index */
:root {
            --primary: #0B3B2F;
            --accent: #00C9A7;
            --accent-hover: #00B395;
            --bg: #F5F7F6;
            --white: #FFFFFF;
            --text: #1A2B24;
            --text-light: #5C6B65;
            --text-muted: #889993;
            --border: #E8ECEA;
            --light-bg: #F0F3F1;
            --shadow-sm: 0 2px 12px rgba(11, 59, 47, 0.06);
            --shadow-md: 0 8px 28px rgba(11, 59, 47, 0.12);
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-btn: 6px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
            --max-width: 1280px;
            --nav-height: 64px;
            --transition: 0.2s ease;
        }

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

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

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

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

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

        button, .btn {
            cursor: pointer;
            font-family: inherit;
            border: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            font-weight: 600;
            font-size: 15px;
        }

        h1, h2, h3 {
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }

        h1 {
            font-size: 2.8rem;
            letter-spacing: -0.5px;
        }

        h2 {
            font-size: 2rem;
            margin-bottom: 16px;
        }

        h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }

        .section {
            padding: 100px 0;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .section {
                padding: 70px 0;
            }
            .container {
                padding: 0 16px;
            }
        }

        /* 导航 */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(11, 59, 47, 0.08);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }

        .logo-icon {
            width: 28px;
            height: 28px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-icon::before {
            content: '';
            width: 22px;
            height: 22px;
            border: 2px solid var(--accent);
            clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
            display: block;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            font-size: 15px;
            color: #4A5B54;
            font-weight: 500;
        }

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

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--light-bg);
            border-radius: var(--radius-md);
            padding: 8px 14px;
            width: 200px;
            gap: 8px;
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--accent);
            background: var(--white);
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--text);
            width: 100%;
            font-family: inherit;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-shortcut {
            font-size: 12px;
            color: var(--text-muted);
            background: var(--white);
            padding: 2px 6px;
            border-radius: 4px;
            border: 1px solid var(--border);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-btn);
            height: 48px;
            padding: 0 28px;
            font-weight: 600;
        }

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

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            height: 48px;
            padding: 0 28px;
            font-weight: 600;
        }

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

        .btn-sm {
            height: 38px;
            padding: 0 18px;
            font-size: 14px;
        }

        .btn-lg {
            height: 56px;
            padding: 0 48px;
            font-size: 17px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: transparent;
            border: none;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        @media (max-width: 1024px) {
            .nav-links, .nav-right .search-box, .nav-right .btn-primary {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                padding: 24px;
                flex-direction: column;
                gap: 20px;
                display: none;
                border-bottom: 1px solid var(--border);
                z-index: 999;
            }
            .mobile-menu.active {
                display: flex;
            }
            .mobile-menu a {
                font-size: 17px;
                font-weight: 500;
                color: var(--primary);
                padding: 8px 0;
            }
            .mobile-menu .search-box {
                width: 100%;
            }
        }

        /* Hero */
        .hero {
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--white);
            background-image: radial-gradient(circle at 80% 30%, rgba(0, 201, 167, 0.03) 0%, transparent 50%);
            position: relative;
            overflow: hidden;
            padding-top: var(--nav-height);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            width: 100%;
        }

        .hero-text h1 {
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-light);
            margin-bottom: 32px;
            max-width: 500px;
        }

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

        .hero-metrics {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .metric-mini-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .metric-mini-value {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            font-feature-settings: "tnum";
        }

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

        .pulse-dot {
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            position: absolute;
            top: 16px;
            right: 16px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0,201,167,0.6); }
            70% { box-shadow: 0 0 0 8px rgba(0,201,167,0); }
            100% { box-shadow: 0 0 0 0 rgba(0,201,167,0); }
        }

        .hex-decoration {
            position: absolute;
            right: 5%;
            top: 20%;
            width: 300px;
            height: 300px;
            opacity: 0.04;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><polygon points="50,5 90,25 90,75 50,95 10,75 10,25" fill="none" stroke="%230B3B2F" stroke-width="2"/></svg>');
            background-size: 40px 40px;
            pointer-events: none;
        }

        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero {
                min-height: auto;
                padding-bottom: 60px;
            }
            .hero-metrics {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .metric-mini-value {
                font-size: 28px;
            }
        }

        /* 数据指标看板 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            text-align: center;
        }

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

        .metric-label {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .metric-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary);
            font-feature-settings: "tnum";
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .metric-trend {
            font-size: 14px;
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }

        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* 服务矩阵 非对称网格 */
        .services-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

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

        .service-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            flex-direction: column;
        }

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

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

        .service-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: var(--light-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            overflow: hidden;
        }

        .service-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .service-card h3 {
            margin-bottom: 12px;
        }

        .service-desc {
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 20px;
            flex: 1;
        }

        .service-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        @media (max-width: 768px) {
            .services-grid, .services-row {
                grid-template-columns: 1fr;
            }
        }

        /* 对比 */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 24px;
            align-items: start;
        }

        .vs-badge {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-muted);
            background: var(--white);
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
            margin-top: 40px;
        }

        .compare-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 2px solid transparent;
        }

        .compare-card.left {
            background: var(--light-bg);
            color: var(--text-muted);
            border-color: var(--border);
        }

        .compare-card.right {
            border-color: var(--accent);
        }

        .compare-card h3 {
            text-align: center;
            margin-bottom: 24px;
        }

        .compare-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .compare-list li {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .icon-check {
            color: var(--accent);
            font-weight: bold;
        }

        .icon-cross {
            color: #C04A4A;
        }

        @media (max-width: 768px) {
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .vs-badge {
                margin: 0 auto;
            }
        }

        /* 流程 */
        .process-timeline {
            display: flex;
            justify-content: space-between;
            position: relative;
            gap: 20px;
        }

        .process-step {
            flex: 1;
            text-align: center;
            position: relative;
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .step-number {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 16px;
        }

        @media (max-width: 768px) {
            .process-timeline {
                flex-direction: column;
            }
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 17px;
            color: var(--primary);
            border: none;
            cursor: pointer;
            text-align: left;
        }

        .faq-icon {
            font-size: 22px;
            transition: transform 0.2s;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            background: #FAFBFA;
            border-left: 3px solid var(--accent);
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-answer p {
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 16px 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* CTA */
        .cta-dark {
            background: var(--primary);
            color: var(--white);
            text-align: center;
            border-radius: var(--radius-lg);
            padding: 80px 24px;
        }

        .cta-dark h2 {
            color: var(--white);
        }

        .cta-sub {
            color: #B7C9C2;
            margin-bottom: 32px;
        }

        .cta-note {
            color: var(--text-muted);
            font-size: 13px;
            margin-top: 16px;
        }

        /* 页脚 */
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding: 60px 0;
        }

        .footer-col p {
            color: var(--text-light);
            margin: 12px 0;
            font-size: 14px;
        }

        .footer-col h4 {
            margin-bottom: 16px;
            color: var(--primary);
        }

        .footer-col a {
            display: block;
            color: var(--text-light);
            margin-bottom: 8px;
            font-size: 14px;
        }

        .footer-bottom {
            background: var(--primary);
            color: #B7C9C2;
            font-size: 13px;
            padding: 20px 0;
            text-align: center;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }