.xuanxiangka{background:#e3ebe3; width:100%; margin-top:50px; padding-top:50px; padding-bottom:80px; }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .tab-container {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            margin-top: 30px;
        }
        
        /* 选项卡导航样式 - 精简版 */
        .nav-tabs {
            background-color: #e3ebe3;
            padding: 0;
        }
        
        .nav-tabs .nav-item {
            margin-bottom: -2px;
        }
        
        .nav-tabs .nav-link {
            color: #4c6d8d;
            font-weight: normal;
            border: none;
            border-bottom: 3px solid transparent;
            padding: 10px 20px;
            transition: all 0.3s ease;
            border-radius:  10px 10px 0 0; /* 左上角和右上角圆角 */;
        }
        
        .nav-tabs .nav-link:hover {
            color: #4c6d8d;
            background-color: #e3ebe3;
            border-bottom: 3px solid #e3ebe3;
        }
        
        .nav-tabs .nav-link.active {
            color: #444444;
            background-color: white;
            border-bottom: 3px solid #ffffff;
            font-weight: 600;
        }
        
        .nav-tabs .nav-link i {
            margin-right: 8px;
            font-size: 0.8rem;
        }
        
        /* 选项卡内容样式 */
        .tab-content {
            padding: 30px;
        }
        
        .tab-pane h3 {
            color: #2a5298;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .tab-pane h4 {line-height: 1.6; font-size:16px; color:#444;  }
        .tab-pane p {line-height: 1.6; margin-bottom: 10px; font-size:14px; }
        
        
        .page_main{ padding-bottom:0;}
        .mb-4 { font-size:28px; color:#444; }
        /* 响应式调整 */
        @media (max-width: 768px) {
            .nav-tabs .nav-link {
                padding: 12px 15px;
                font-size: 0.9rem;
            }
            
            .tab-content {
                padding: 20px;
            }
        }
        
        
        
        
        
        
        
         /* 左右分栏的规格列表 */
        .spec-list {
            list-style: none;
            padding: 0;
            margin: 0;
            overflow: hidden;
            border-radius: 6px;
        }
        
        .spec-item {
            display: flex;
            justify-content: space-between;
            padding: 14px 16px;
            margin: 0; border-radius: 6px 6px 6px 6px;
        }
        
        /* 奇数行灰色背景 */
        .spec-item:nth-child(odd) {
            background-color: #f8f9fa;
        }
        
        /* 偶数行白色背景 */
        .spec-item:nth-child(even) {
            background-color: #ffffff;
        }
        
        /* 首行和末行圆角 */
        .spec-list .spec-item:first-child {
            border-radius: 6px 6px 6px 6px;
        }
        
        .spec-list .spec-item:last-child {
            border-radius: 6px 6px 6px 6px;
        }
        
        .spec-label {
            color: #555;
            font-weight: 500;
        }
        
        .spec-value {
            color: #333;
            font-weight: 500;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .spec-item {
                flex-direction: column;
            }
            
            .spec-value {
                padding-top: 4px;
            }
        }
/* 选项卡结束 */