* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Microsoft YaHei', sans-serif;
            background-color: #f5f5f5;
            color: #333;
        }
        
        .header {
            background-color: #fff;
            padding: 15px 20px;
            border-bottom: 1px solid #e5e5e5;
            position: relative;
        }
        
        .header h1 {
            font-size: 18px;
            text-align: center;
            color: #333;
        }
        
        .back-btn {
            position: absolute;
            left: 10px;
            top: 15px;
            font-size: 20px;
            color: #333;
        }
         .back-btn img { 
            width: 24px;
            height: 24px;
        }

        
        .search-container {
            padding: 20px;
            background-color: #fff;
            margin-bottom: 10px;
        }
        
        .search-group {
            margin-bottom: 15px;
        }
        
        .search-group label {
            display: block;
            margin-bottom: 5px;
            font-size: 16px;
            color: #333;
        }
        
        .search-input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 14px;
        }
        
        .search-btn {
            width: 100%;
            padding: 12px;
            background-color: #1877f2;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
            margin-top: 10px;
        }
        
        .product-list {
            background-color: #fff;
        }
        
        .product-item {
            padding: 15px;
            border-bottom: 1px solid #e5e5e5;
        }
        
        .product-item:last-child {
            border-bottom: none;
        }
        
        .product-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 14px;
            color: #666;
        }
        
        .product-name {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }
        
        .product-info {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        
        .info-item {
            width: 50%;
            font-size: 14px;
            color: #666;
            margin-bottom: 5px;
        }
        
        .info-label {
            font-weight: normal;
            color: #999;
        }
        
        .info-value {
            color: #333;
        }
        
        .contact-info {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            font-size: 14px;
            color: #666;
            border-top: 1px solid #e5e5e5;
        }
        
        .highlight {
            color: #e74c3c;
        }
        
        .price {
            color: #e74c3c;
            font-weight: bold;
        }