* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
        }

        :root {
            --primary-blue: #0056b3;
            --secondary-blue: #007BFF;
            --light-blue: #E6F2FF;
            --accent-orange: #FF6B35;
            --text-dark: #333;
            --text-light: #666;
            --white: #fff;
            --gray-bg: #f8fafc;
            --border-color: #eef2f7;
        }

        body {
            color: var(--text-dark);
            line-height: 1.6;
            background-color: var(--gray-bg);
            padding-top: 90px; /* 给固定导航腾出空间 */
        }

        .container {
            width: 100%;
            max-width: 1216px;
            margin: 0 auto;
            padding: 0 15px;
        }

        /* ================== 产品详情页面专用样式 ================== */
        .product-detail-page {
            margin-top: 76px;
            padding: 40px 0 80px;
        }

        /* 面包屑 */
        .breadcrumb {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 30px;
        }
        .breadcrumb a { color: var(--text-light); transition: color 0.3s; }
        .breadcrumb a:hover { color: var(--primary-blue); }
        .breadcrumb span { margin: 0 8px; }

        /* 主体布局：左图右文 */
        .product-main {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            background: var(--white);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 15px 50px rgba(0, 86, 179, 0.08);
            margin-bottom: 60px;
        }

        /* 左侧：图片展示 */
        .product-gallery .main-image {
            width: 100%;
            height: 400px;
            object-fit: contain;
            border-radius: 12px;
            background: var(--gray-bg);
            margin-bottom: 20px;
            padding: 20px;
        }
        .thumbnail-list {
            display: flex;
            gap: 15px;
        }
        .thumbnail {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 8px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all 0.3s;
            background: var(--gray-bg);
            padding: 5px;
        }
        .thumbnail:hover, .thumbnail.active {
            border-color: var(--primary-blue);
            transform: scale(1.05);
        }

        /* 右侧：产品信息 */
        .product-info h1 {
            font-size: 28px;
            color: var(--text-dark);
            margin-bottom: 15px;
            line-height: 1.3;
        }
        .product-meta {
            display: flex;
            gap: 20px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 25px;
            padding-bottom: 25px;
            border-bottom: 1px solid var(--border-color);
        }
        .product-price {
            font-size: 32px;
            color: var(--accent-orange);
            font-weight: bold;
            margin-bottom: 25px;
        }
        .product-desc-short {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 30px;
        }

        /* 参数列表 */
        .specs-table {
            width: 100%;
            margin-bottom: 30px;
        }
        .specs-table tr {
            border-bottom: 1px dashed var(--border-color);
        }
        .specs-table td {
            padding: 12px 0;
            font-size: 14px;
        }
        .specs-table td:first-child {
            color: var(--text-light);
            width: 120px;
        }
        .specs-table td:last-child {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* 操作按钮 */
        .action-buttons {
            display: flex;
            gap: 15px;
        }
        .btn-enquiry, .btn-favorite {
            flex: 1;
            padding: 15px 20px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-align: center;
        }
        .btn-enquiry {
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            border: none;
        }
        .btn-enquiry:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 123, 255, 0.3);
        }
        .btn-favorite {
            background: var(--white);
            color: var(--text-dark);
            border: 2px solid var(--border-color);
        }
        .btn-favorite:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
        }

        /* 下方：详情与推荐 */
        .detail-tabs {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
            border-bottom: 2px solid var(--border-color);
        }
        .tab-btn {
            padding: 15px 25px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            border-bottom: 3px solid transparent;
            margin-bottom: -2px;
            transition: all 0.3s;
        }
        .tab-btn.active {
            color: var(--primary-blue);
            border-bottom-color: var(--primary-blue);
        }

        .tab-content {
            background: var(--white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 40px rgba(0, 86, 179, 0.08);
            margin-bottom: 60px;
        }
        .tab-panel { display: none; }
        .tab-panel.active { display: block; }
        .tab-panel h3 {
            font-size: 20px;
            color: var(--text-dark);
            margin-bottom: 20px;
        }
        .tab-panel p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 15px;
        }
        .tab-panel ul {
            padding-left: 20px;
            color: var(--text-light);
        }
        .tab-panel li {
            margin-bottom: 10px;
        }

        /* 相关推荐 */
        .related-products h2 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 30px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        .related-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        .related-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 86, 179, 0.15);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .related-card p {
            padding: 15px;
            text-align: center;
            font-size: 14px;
            color: var(--text-dark);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .product-main { grid-template-columns: 1fr; gap: 40px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .product-main { padding: 25px; }
            .action-buttons { flex-direction: column; }
            .related-grid { grid-template-columns: 1fr; }
        }