:root {
            --primary-color: #2B73DA;
            --light-bg: #f8fafd;
            --dark-text: #333;
            --light-text: #666;
            --white: #ffffff;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: Arial, sans-serif;
        }
        
        body {
            background-color: var(--light-bg);
            color: var(--dark-text);
            line-height: 1.6;
            font-size: 18px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        
        /* 产品介绍模块样式 - 无外框 */
        .product-section {
            margin-bottom: 0px;
            width: 100%;
            padding: 20px 0;
        }
        
        .section-header {
            margin-bottom: 15px;
            position: relative;
            padding-bottom: 8px;
        }
        
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary-color);
            display: inline-block;
            position: relative;
        }
        
        .section-header h2:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--primary-color);
            transition: width 0.3s ease;
        }
        
        .section-header:hover h2:after {
            width: 100%;
        }
        
        /* 描述部分样式 */
        .description-text {
            line-height: 1.7;
            margin-bottom: 15px;
            color: var(--light-text);
        }
        
        /* 列表样式 */
        .spec-list, .feature-list, .performance-list, .application-list, .packaging-list, .system-list {
            list-style-type: none;
            margin-top: 10px;
        }
        
        .spec-list li, .feature-list li, .performance-list li, .application-list li, .packaging-list li, .system-list li {
            margin-bottom: 8px;
            padding-left: 20px;
            position: relative;
        }
        
        .spec-list li:before, .feature-list li:before, .performance-list li:before, .application-list li:before, .packaging-list li:before, .system-list li:before {
            content: "•";
            color: var(--primary-color);
            position: absolute;
            left: 0;
            font-weight: bold;
            font-size: 18px;
        }
        
        .list-title {
            font-weight: bold;
            color: var(--primary-color);
            margin-top: 15px;
            margin-bottom: 8px;
            font-size: 20px;
        }
        
        /* 应用部分样式 */
        .applications-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 15px;
            margin-top: 15px;
        }
        
        .application-item {
            padding: 15px;
            border-left: 3px solid var(--primary-color);
            background-color: rgba(43, 115, 218, 0.05);
        }
        
        .application-item h4 {
            color: var(--primary-color);
            margin-bottom: 8px;
            font-size: 18px;
        }
        
        .application-item p {
            color: var(--light-text);
            line-height: 1.6;
        }
        
        /* 定制与支持样式 */
        .customization-text {
            padding: 15px;
            border-left: 3px solid var(--primary-color);
            margin-top: 10px;
            line-height: 1.7;
            background-color: rgba(43, 115, 218, 0.05);
        }
        
        /* 系统优势样式 */
        .system-advantages {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        
        .advantage-item {
            padding: 20px;
            background: var(--white);
            border-radius: 5px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
        }
        
        .advantage-item h4 {
            color: var(--primary-color);
            margin-bottom: 10px;
            font-size: 20px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            body {
                font-size: 16px;
            }
            
            .product-section {
                padding: 15px 0;
            }
            
            .section-header h2 {
                font-size: 22px;
            }
            
            .applications-grid, .system-advantages {
                grid-template-columns: 1fr;
            }
            
            .spec-list li, .feature-list li, .performance-list li, .application-list li, .packaging-list li, .system-list li {
                padding-left: 18px;
            }
        }
        
        @media (max-width: 480px) {
            .product-section {
                padding: 10px 0;
            }
            
            .section-header h2 {
                font-size: 20px;
            }
            
            .application-item, .advantage-item {
                padding: 12px;
            }
        }