* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        body {
            color: #333;
            line-height: 1.6;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        .product-header {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 40px;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }
        .product-gallery {
            flex: 1;
            min-width: 300px;
            padding: 15px;
        }
        .main-image {
            width: 100%;
            height: auto;
            border: 1px solid #eee;
            margin-bottom: 15px;
        }
        .thumbnail-container {
            display: flex;
            gap: 10px;
        }
        .thumbnail {
            width: 80px;
            height: 80px;
            border: 1px solid #ddd;
            cursor: pointer;
        }
        .product-info {
            flex: 1;
            min-width: 300px;
            padding: 15px;
        }
        .product-title {
            font-size: 28px;
            margin-bottom: 10px;
            color: #222;
        }
        .product-subtitle {
            font-size: 16px;
            color: #666;
            margin-bottom: 20px;
        }
        .price-container {
            margin: 20px 0;
        }
        .current-price {
            font-size: 28px;
            color: #e74c3c;
            font-weight: bold;
        }
        .original-price {
            font-size: 16px;
            color: #999;
            text-decoration: line-through;
            margin-left: 10px;
        }
        .discount-badge {
            display: inline-block;
            background-color: #e74c3c;
            color: white;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 14px;
            margin-left: 10px;
        }
        .highlight-features {
            margin: 25px 0;
        }
        .feature-item {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
        }
        .feature-icon {
            margin-right: 10px;
            color: #3498db;
        }
        .action-buttons {
            margin-top: 30px;
        }
        .btn {
            display: inline-block;
            padding: 12px 30px;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-align: center;
            text-decoration: none;
            transition: all 0.3s;
        }
        .btn-primary {
            background-color: #3498db;
            color: white;
            border: 1px solid #3498db;
        }
        .btn-primary:hover {
            background-color: #2980b9;
        }
        .btn-secondary {
            background-color: white;
            color: #3498db;
            border: 1px solid #3498db;
            margin-left: 15px;
        }
        .btn-secondary:hover {
            background-color: #f8f9fa;
        }
        .product-tabs {
            margin: 40px 0;
        }
        .tab-header {
            display: flex;
            border-bottom: 1px solid #ddd;
        }
        .tab-btn {
            padding: 12px 25px;
            cursor: pointer;
            background: none;
            border: none;
            border-bottom: 3px solid transparent;
            font-size: 16px;
            transition: all 0.3s;
        }
        .tab-btn.active {
            border-bottom: 3px solid #3498db;
            color: #3498db;
            font-weight: bold;
        }
        .tab-content {
            padding: 20px 0;
            display: block;
        }
        .tab-content.active {
            display: block;
        }
        .specs-table {
            width: 100%;
            border-collapse: collapse;
        }
        .specs-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .specs-table th, .specs-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        .specs-table th {
            width: 30%;
            font-weight: normal;
            color: #666;
        }
        .feature-boxes {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 10px 0;
        }
        .feature-box {
            flex: 1;
            min-width: 450px;
            padding: 25px;
            background-color: #f8f9fa;
            border-radius: 8px;
            text-align: center;
        }
        .feature-box img {
            width: 80px;
            height: 80px;
            margin-bottom: 15px;
        }
        .feature-box h3 {
            margin-bottom: 10px;
            color: #3498db;
        }
        .review-item {
            padding: 20px;
            border-bottom: 1px solid #eee;
            margin-bottom: 20px;
        }
        .review-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }
        .review-author {
            font-weight: bold;
        }
        .review-date {
            color: #999;
        }
        .review-rating {
            color: #f39c12;
            margin: 5px 0;
        }
        .faq-item {
            margin-bottom: 20px;
            border: 1px solid #eee;
            border-radius: 5px;
            overflow: hidden;
        }
        .faq-question {
            padding: 15px 20px;
            background-color: #f8f9fa;
            cursor: pointer;
            font-weight: bold;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            padding: 20px;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }
        .related-products {
            margin-top: 50px;
        }
        .section-title {
            font-size: 24px;
            margin-bottom: 30px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .product-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .product-card {
            flex: 1;
            min-width: 200px;
            border: 1px solid #eee;
            border-radius: 5px;
            overflow: hidden;
            transition: all 0.3s;
        }
        .product-card:hover {
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .product-card img {
            width: 100%;
            height: auto;
        }
        .product-card-body {
            padding: 15px;
        }
        .product-card-title {
            font-size: 16px;
            margin-bottom: 10px;
        }
        .product-card-price {
            color: #e74c3c;
            font-weight: bold;
        }
        @media (max-width: 768px) {
            .product-header {
                flex-direction: column;
            }
            .tab-header {
                overflow-x: auto;
                white-space: nowrap;
            }
            .btn {
                display: block;
                width: 100%;
                margin-bottom: 10px;
            }
            .btn-secondary {
                margin-left: 0;
            }
        }