/* 全局变量定义：主题色、字体、间距 */
        :root {
            --primary-color: #0052D9; /* 商务蓝 */
            --primary-hover: #003CAB;
            --accent-color: #E6F0FF;   /* 浅蓝背景装饰 */
            --text-main: #1D2129;      /* 主要文字颜色 */
            --text-secondary: #4E5969; /* 次要文字颜色 */
            --bg-body: #F2F3F5;        /* 页面背景 */
            --bg-white: #FFFFFF;
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 8px 24px rgba(0, 82, 217, 0.12);
            --radius-md: 8px;
            --radius-lg: 16px;
            --container-width: 1140px;
        }

        /* 重置基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        /* 通用布局类 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 80px 0;
        }

        /* 顶部 Logo 区域 */
        header {
            background: var(--bg-white);
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }

        .header-content {
            display: flex;
            justify-content: center; /* 居中显示，因为没有导航 */
            align-items: center;
        }

        .logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        /* 简单的 Logo 图标模拟 */
        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary-color);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 900;
            font-style: italic;
        }

        /* 首屏 Hero 区域 */
        .hero {
            background: linear-gradient(180deg, #FFFFFF 0%, #F0F5FF 100%);
            padding: 100px 0 120px;
            text-align: center;
            overflow: hidden;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.8;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 16px 48px;
            font-size: 18px;
            font-weight: 600;
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.3);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 82, 217, 0.4);
        }

        .hero-image {
            margin-top: 60px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(0,0,0,0.05);
            max-width: 1000px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 核心功能区域 */
        .features {
            background-color: var(--bg-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 32px;
            margin-bottom: 16px;
            color: var(--text-main);
        }

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

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 32px;
        }

        .feature-card {
            padding: 32px;
            background: var(--bg-white);
            border: 1px solid #E5E6EB;
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
        }

        .feature-card:hover {
            border-color: var(--primary-color);
            box-shadow: var(--shadow-hover);
            transform: translateY(-5px);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            background-color: var(--accent-color);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        
        .feature-icon svg {
            width: 24px;
            height: 24px;
        }

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

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

        /* 适用场景区域 */
        .scenarios {
            background-color: #F7F8FA;
        }

        .scenario-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .scenario-tag {
            background: white;
            padding: 12px 24px;
            border-radius: 50px;
            font-size: 15px;
            color: var(--text-main);
            border: 1px solid #E5E6EB;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: 0.2s;
        }
        
        .scenario-tag:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        
        .scenario-tag::before {
            content: '';
            display: block;
            width: 8px;
            height: 8px;
            background-color: var(--primary-color);
            border-radius: 50%;
        }

        /* 数据分析亮点区域 */
        .analytics-highlight {
            display: flex;
            align-items: center;
            gap: 60px;
            background-color: var(--bg-white);
        }

        .analytics-text {
            flex: 1;
        }

        .analytics-visual {
            flex: 1;
            background-color: #F2F3F5;
            border-radius: var(--radius-lg);
            padding: 40px;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .chart-mockup {
            width: 100%;
            max-width: 400px;
            background: white;
            border-radius: 8px;
            box-shadow: var(--shadow-card);
            padding: 20px;
        }
        
        .chart-bar {
            height: 30px;
            background: var(--accent-color);
            margin-bottom: 10px;
            border-radius: 4px;
            position: relative;
            overflow: hidden;
        }
        
        .chart-bar::after {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 70%; /* 模拟数据 */
            background: var(--primary-color);
            animation: grow 1.5s ease-out forwards;
        }
        
        @keyframes grow {
            from { width: 0; }
        }

        .analytics-list {
            list-style: none;
            margin-top: 30px;
        }

        .analytics-list li {
            margin-bottom: 16px;
            display: flex;
            align-items: start;
            gap: 12px;
            font-size: 16px;
            color: var(--text-secondary);
        }
        
        .check-icon {
            color: #00B42A;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* 渠道嵌入区域 */
        .integration {
            background: var(--primary-color);
            color: white;
            text-align: center;
        }
        
        .integration h2 {
            margin-bottom: 20px;
        }
        
        .integration p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 40px;
        }
        
        .platform-icons {
            display: flex;
            justify-content: center;
            gap: 40px;
            opacity: 0.9;
        }

        /* 底部 Footer */
        footer {
            background-color: #232931;
            color: #858D9D;
            padding: 60px 0 30px;
            text-align: center;
            font-size: 14px;
        }

        .footer-links {
            margin-bottom: 20px;
        }
        
        .footer-links a {
            color: #858D9D;
            text-decoration: none;
            margin: 0 15px;
            transition: color 0.2s;
        }
        
        .footer-links a:hover {
            color: white;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 32px;
            }
            
            .hero p {
                font-size: 16px;
            }
            
            .analytics-highlight {
                flex-direction: column;
                gap: 30px;
            }
            
            .section {
                padding: 50px 0;
            }
        }