/* roulang page: index */
:root {
            --primary: #00D084;
            --primary-hover: #00b371;
            --primary-light: rgba(0, 208, 132, 0.12);
            --dark: #0B0F17;
            --dark-surface: #131B2A;
            --dark-card: #1C2638;
            --light-bg: #F8FAFC;
            --white: #FFFFFF;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border-color: #E2E8F0;
            --border-dark: #2A3850;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 35px -10px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--light-bg);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏与主导航 */
        .top-bar {
            background-color: var(--dark);
            color: var(--text-light);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-info span {
            margin-right: 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }
        .logo-badge {
            background: var(--primary);
            color: var(--dark);
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 700;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 600;
            color: #334155;
            position: relative;
            padding: 6px 0;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            text-align: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #042517;
            box-shadow: 0 4px 14px rgba(0, 208, 132, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 208, 132, 0.45);
        }
        .btn-outline {
            border-color: var(--border-color);
            background: var(--white);
            color: var(--dark);
        }
        .btn-outline:hover {
            background: #F1F5F9;
            border-color: #CBD5E1;
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--dark);
            color: var(--white);
        }
        .btn-dark:hover {
            background: #1E293B;
            transform: translateY(-2px);
        }

        /* 板块通用 */
        .section {
            padding: 96px 0;
            position: relative;
        }
        .section-dark {
            background-color: var(--dark);
            color: var(--white);
        }
        .section-white {
            background-color: var(--white);
        }
        .section-gray {
            background-color: var(--light-bg);
        }
        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 60px;
        }
        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-light);
            color: #00965e;
            font-size: 13px;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .section-dark .section-tag {
            background: rgba(0, 208, 132, 0.2);
            color: var(--primary);
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .section-dark .section-desc {
            color: var(--text-light);
        }

        /* 1. Hero 板块：产品截图舞台居中 */
        .hero-section {
            padding: 80px 0 100px;
            background: radial-gradient(circle at 50% 20%, rgba(0, 208, 132, 0.1) 0%, rgba(248, 250, 252, 0) 70%), #F8FAFC;
            text-align: center;
        }
        .hero-title {
            font-size: 46px;
            font-weight: 900;
            line-height: 1.25;
            color: var(--dark);
            max-width: 900px;
            margin: 0 auto 20px;
            letter-spacing: -1px;
        }
        .hero-highlight {
            color: #059669;
            background: linear-gradient(120deg, #059669, #00D084);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-lead {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 820px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-cta-group {
            display: flex;
            justify-content: center;
            gap: 18px;
            margin-bottom: 50px;
        }
        .stage-wrapper {
            position: relative;
            max-width: 1060px;
            margin: 0 auto;
            border-radius: var(--radius-lg);
            padding: 12px;
            background: linear-gradient(180deg, rgba(255,255,255,0.8), rgba(226, 232, 240, 0.6));
            box-shadow: 0 25px 60px -15px rgba(15, 23, 42, 0.15);
            border: 1px solid var(--border-color);
        }
        .stage-image {
            width: 100%;
            height: 480px;
            object-fit: cover;
            border-radius: 12px;
        }
        .stage-float-card {
            position: absolute;
            background: var(--white);
            padding: 16px 20px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 14px;
            text-align: left;
        }
        .card-left {
            bottom: 40px;
            left: -24px;
        }
        .card-right {
            top: 40px;
            right: -24px;
        }
        .float-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            color: #059669;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: bold;
        }

        /* 2. 行业痛点板块 (Pain Points Grid) */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .pain-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 32px 24px;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .pain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: #CBD5E1;
        }
        .pain-num {
            font-size: 20px;
            font-weight: 800;
            color: #E11D48;
            margin-bottom: 16px;
        }
        .pain-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--dark);
        }
        .pain-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 3. 解决方案总览 (Solution Overview) */
        .solution-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .solution-img-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .solution-img-wrapper img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .solution-feature-list {
            margin-top: 28px;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }
        .solution-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .solution-check {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: #059669;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* 4. 核心功能矩阵 (6 Core Features) */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .feature-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 36px 28px;
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }
        .feature-icon-box {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            color: #059669;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 22px;
        }
        .feature-card h3 {
            font-size: 19px;
            margin-bottom: 12px;
            color: var(--dark);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 5. 三大旗舰产品体系 (3 Modules) */
        .modules-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .module-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            transition: var(--transition);
        }
        .module-card.highlight {
            border-color: var(--primary);
            box-shadow: 0 15px 30px rgba(0, 208, 132, 0.15);
        }
        .module-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: var(--primary);
            color: var(--dark);
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 20px;
            font-weight: 700;
        }
        .module-card h3 {
            font-size: 22px;
            margin-bottom: 14px;
            color: var(--dark);
        }
        .module-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            line-height: 1.65;
        }
        .module-points {
            list-style: none;
            margin-bottom: 32px;
        }
        .module-points li {
            font-size: 14px;
            color: #475569;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .module-points li::before {
            content: "✓";
            color: #059669;
            font-weight: bold;
        }

        /* 6. 三步上手流程 (Three Steps) */
        .step-flow-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }
        .step-card {
            background: var(--dark-surface);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            position: relative;
        }
        .step-index {
            font-size: 44px;
            font-weight: 900;
            color: rgba(0, 208, 132, 0.2);
            line-height: 1;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 20px;
            color: var(--white);
            margin-bottom: 12px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* 7. 标杆客户与应用故事 (User Stories) */
        .story-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 60px;
        }
        .story-row:last-child {
            margin-bottom: 0;
        }
        .story-row.reverse {
            direction: rtl;
        }
        .story-row.reverse .story-content {
            direction: ltr;
        }
        .story-img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
        }
        .story-content h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--dark);
        }
        .story-content p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .story-stats {
            display: flex;
            gap: 30px;
        }
        .stat-item h4 {
            font-size: 26px;
            color: #059669;
            font-weight: 800;
        }
        .stat-item span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 8. 关键业务数据指标条 (Metrics Strip) */
        .metrics-banner {
            background: linear-gradient(135deg, #0B0F17 0%, #1E293B 100%);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
            color: var(--white);
            box-shadow: var(--shadow-lg);
        }
        .metric-box h3 {
            font-size: 42px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 8px;
            letter-spacing: -1px;
        }
        .metric-box p {
            font-size: 15px;
            color: var(--text-light);
        }

        /* 9. 多端入口与系统要求 (System Requirements & Terminals) */
        .terminal-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .terminal-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .terminal-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .terminal-tag {
            display: inline-block;
            font-size: 12px;
            background: #F1F5F9;
            color: #475569;
            padding: 4px 10px;
            border-radius: 12px;
            margin-bottom: 14px;
        }
        .terminal-card h4 {
            font-size: 18px;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .terminal-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 10. 评价墙 (Testimonials Wall) */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testi-card {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .testi-quote {
            font-size: 14px;
            color: #334155;
            line-height: 1.7;
            margin-bottom: 24px;
            position: relative;
        }
        .testi-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-color);
            padding-top: 18px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: #475569;
        }
        .author-info h5 {
            font-size: 15px;
            color: var(--dark);
        }
        .author-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 11. 资讯摘要 (News & Insights) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .news-card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .news-thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .news-body {
            padding: 24px;
        }
        .news-meta {
            font-size: 12px;
            color: #059669;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .news-body h4 {
            font-size: 17px;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 12. 强转化行动区与常见答疑 */
        .cta-box {
            background: linear-gradient(135deg, #00D084 0%, #059669 100%);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            color: var(--white);
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            box-shadow: 0 20px 40px rgba(0, 208, 132, 0.25);
        }
        .cta-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: #042517;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 16px;
            color: #064e3b;
            line-height: 1.7;
        }
        .cta-form {
            background: var(--white);
            padding: 30px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }
        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 208, 132, 0.2);
        }

        /* 页脚规范 */
        .site-footer {
            background-color: var(--dark);
            color: var(--text-light);
            padding: 80px 0 30px;
            border-top: 1px solid var(--border-dark);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 60px;
        }
        .footer-brand h3 {
            color: var(--white);
            font-size: 20px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            line-height: 1.7;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-contact p {
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-dark);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        /* 移动端与响应式适配 */
        @media (max-width: 1024px) {
            .pain-grid, .terminal-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid, .modules-grid, .testimonials-grid, .news-grid, .step-flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-banner {
                grid-template-columns: repeat(2, 1fr);
            }
            .solution-split, .cta-box {
                grid-template-columns: 1fr;
            }
            .stage-float-card {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .main-nav {
                display: none;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 26px;
            }
            .section {
                padding: 60px 0;
            }
            .pain-grid, .feature-grid, .modules-grid, .step-flow-grid, .testimonials-grid, .news-grid, .terminal-grid {
                grid-template-columns: 1fr;
            }
            .story-row, .story-row.reverse {
                grid-template-columns: 1fr;
                direction: ltr;
            }
            .metrics-banner {
                grid-template-columns: 1fr;
                padding: 30px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }