:root {
            --primary-color: #1a3a6d;
            --secondary-color: #2e5aa7;
            --light-bg: #f5f7fa;
            --card-bg: #ffffff;
            --text-dark: #333333;
            --text-medium: #555555;
            --text-light: #777777;
            --border-color: #e1e5eb;
            --hover-color: #f0f5ff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.6;
            min-height: 100vh;
        }
        
        .container {
            width:100%;
            max-width: 1400px;
            margin: 0 auto;
            margin-top: 100px;
        }
        
        /* 当前位置导航 */
        .location-nav {
            margin-bottom: 30px;
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        
        .location-nav ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        
        .location-nav li {
            display: flex;
            align-items: center;
            font-size: 0.95rem;
            color: var(--text-light);
        }
        
        .location-nav li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: #aaa;
        }
        
        .location-nav a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .location-nav a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        
        /* 产品展示区域 */
        .product-detail-container {
            width:100%;
            max-width:1400px;
            display: flex;
            gap: 40px;
            margin-bottom: 50px;
            flex-direction: column; /* 默认垂直排列 */
        }
        
        .product-gallery {
            width:100%;
            flex: 0 0 55%; /* 占据55%宽度 */
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
        }
        
        .product-info {
            flex: 0 0 45%; /* 占据45%宽度 */
        }
        
        /* Swiper 样式 - 优化版 */
        .swiper {
            width: 100%;
            margin-bottom: 20px;
            border-radius: var(--radius);
            overflow: hidden;
        }
        
        .swiper-main {
            height: 600px;
            margin-bottom: 15px;
        }
        
        .swiper-slide {
            display: flex;
            align-items: center;
            justify-content: center;
            background: #f8f9ff;
        }
        
        .swiper-slide img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }
        
        .swiper-thumbs {
            height: 120px; /* 增加高度以容纳4:3比例 */
        }
        
        .swiper-thumbs .swiper-wrapper {
            align-items: center; /* 垂直居中 */
            justify-content: center;
        }
        
        /* 缩略图容器 - 4:3比例 */
        .thumb-container {
            position: relative;
            width: 100%;
            padding-top: 75%; /* 4:3 比例 */
            overflow: hidden;
            border-radius: 6px;
            border: 2px solid transparent;
        }
        
        .swiper-thumbs .swiper-slide {
            height: auto; /* 高度自适应 */
        }
        
        .thumb-container img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .swiper-thumbs .swiper-slide {
            opacity: 0.7;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .swiper-thumbs .swiper-slide:hover {
            opacity: 0.9;
        }
        
        .swiper-thumbs .swiper-slide-thumb-active {
            opacity: 1;
        }
        
        .swiper-thumbs .swiper-slide-thumb-active .thumb-container {
            border-color: var(--primary-color);
        }
        
        /* 产品基本信息 */
        .product-info {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
        }
        
        .product-title {
            color: var(--primary-color);
            font-size: 2.2rem;
            margin-bottom: 15px;
        }
        
        .product-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 25px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-color);
        }
        
        .product-brand, .product-model, .product-stock {
            display: flex;
            flex-direction: column;
        }
        
        .meta-label {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 5px;
        }
        
        .meta-value {
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--primary-color);
        }
        
        .product-overview {
            margin-bottom: 30px;
        }
        
        .product-overview h3 {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--hover-color);
        }
        
        .overview-content {
            color: var(--text-medium);
            line-height: 1.8;
        }
        
        /* 产品参数表格 */
        .product-specs {
            margin-bottom: 40px;
        }
        
        .specs-title {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--hover-color);
        }
        
        .product-specs table {
            width: 100%;
            border-collapse: collapse;
            border-color:#fff !important;
        }
        
        .product-specs table tr {
            border-bottom: 1px solid var(--border-color);
        }
        
        .product-specs table tr:last-child {
            border-bottom: none;
        }
        
        .product-specs table td {
            padding: 15px 10px;
        }
        
        .product-specs table td:first-child {
            width: 35%;
            font-weight: 600;
            color: var(--primary-color);
            background: var(--hover-color);
        }
        
        /* 产品详情 - 添加边框和背景 */
        .product-description {
            margin-bottom: 40px;
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
        }
        
        .description-title {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--hover-color);
        }
        
        .description-content {
            color: var(--text-medium);
            line-height: 1.8;
        }
        
        .description-content p {
            margin-bottom: 15px;
        }
        
        .description-content img {
            width:auto;
            max-width:100%;
        }
        
        /* 返回按钮 */
        .back-btn-container {
            display: flex;
            justify-content: center;
            margin: 30px 0;
        }
        
        .back-btn {
            display: inline-flex;
            align-items: center;
            padding: 12px 30px;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .back-btn:hover {
            background: var(--secondary-color);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(26, 58, 109, 0.2);
        }
        
        .back-btn i {
            margin-right: 10px;
        }
        
        /* 响应式设计 - 优化版 */
        @media (max-width: 1400px) {
            .container {
               padding:0 20px;
            }
        }
        @media (max-width: 1100px) {
            .product-detail-container {
                gap: 30px;
            }
            
            .swiper-main {
                height: 350px;
            }
        }
        
        @media (max-width: 992px) {
            .product-detail-container {
                flex-direction: column;
            }
            
            .product-gallery {
                flex: 0 0 auto;
            }
            
            .swiper-main {
                height: 400px;
            }
        }
        
        @media (max-width: 768px) {
            .swiper-main {
                height: 350px;
            }
            
            .product-title {
                font-size: 1.8rem;
            }
            
            .product-meta {
                flex-direction: column;
                gap: 15px;
            }
            
            .specs-table td:first-child {
                width: 40%;
            }
            
            .swiper-thumbs {
                height: 100px;
            }
        }
        
        @media (max-width: 576px) {
            body {
                padding: 0;
            }
            
            .swiper-main {
                height: 280px;
            }
            
            .swiper-thumbs {
                height: 80px;
            }
            
            .product-info, .product-description {
                padding: 20px;
            }
            
            .product-title {
                font-size: 1.6rem;
            }
            
            .specs-table td {
                padding: 10px;
                font-size: 0.95rem;
            }
            
            .back-btn {
                padding: 10px 25px;
                font-size: 1rem;
            }
        }
        
        @media (max-width: 480px) {
            .swiper-main {
                height: 240px;
            }
            
            .swiper-thumbs {
                height: 70px;
            }
            
            .product-title {
                font-size: 1.5rem;
            }
            
            .product-overview h3,
            .specs-title,
            .description-title {
                font-size: 1.3rem;
            }
        }
        
        /* Swiper导航按钮 */
        .swiper-button-next, .swiper-button-prev {
            color: var(--primary-color);
            background: rgba(255, 255, 255, 0.8);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        
        .swiper-button-next:hover, .swiper-button-prev:hover {
            background: white;
            transform: scale(1.1);
        }
        
        .swiper-button-next:after, .swiper-button-prev:after {
            font-size: 1.2rem;
            font-weight: bold;
        }