:root { 
            --main-blue: #004a99; 
            --accent-orange: #ff6a00; 
            --bg-light: #f4f7f9; 
            --footer-blue: #33a3dc;
            --border-color: #eeeeee;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; color: #333; background: #fff; line-height: 1.6; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; }
        img { max-width: 100%; display: block; }
        a { text-decoration: none; transition: 0.3s; color: inherit; }

        /* --- 1. 头部与导航 (复用) --- */
        header { background: #fff; padding: 15px 0; }
        .header-flex { display: flex; justify-content: space-between; align-items: center; }
        .phone { font-size: 20px; color: var(--main-blue); font-weight: bold; }

       .main-nav { background: #fff; border-top: 1px solid #eee; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
        .nav-list { display: flex; justify-content: space-between; list-style: none; }
        .nav-list > li { position: relative; }
        .nav-list > li > a { display: block; padding: 15px 10px; color: #333; font-size: 16px; text-decoration: none; transition: 0.3s; }
        .nav-list > li > a:hover, .nav-list > li > a.active { color: var(--accent-orange); border-bottom: 2px solid var(--accent-orange); }

        /* 下拉菜单 */
        .dropdown:hover .submenu { display: block; }
        .submenu { 
            display: none; position: absolute; top: 100%; left: 0; background: #fff; 
            min-width: 160px; box-shadow: 0 5px 15px rgba(0,0,0,0.1); border-top: 2px solid var(--accent-orange); list-style: none; 
        }
        .submenu li a { display: block; padding: 10px 20px; color: #666; font-size: 14px; text-decoration: none; }
        .submenu li a:hover { background: #fdf2ed; color: var(--accent-orange); }

        /* --- 2. 面包屑 --- */
        .breadcrumb { background: var(--bg-light); padding: 12px 0; font-size: 14px; color: #888; margin-bottom: 20px; }

        /* --- 3. 详情页主布局 (左侧边栏 + 右侧内容) --- */
        .detail-wrapper { display: flex; gap: 30px; margin-bottom: 60px; }

        /* --- 左侧侧边栏 --- */
        .sidebar { width: 280px; flex-shrink: 0; }
        
        .side-box { border: 1px solid #eee; border-radius: 4px; overflow: hidden; margin-bottom: 30px; }
        .side-title { background: var(--main-blue); color: #fff; padding: 15px 20px; font-size: 18px; font-weight: bold; }
        
        /* 产品分类列表 */
        .side-cate { list-style: none; }
        .side-cate li a { display: block; padding: 12px 20px; border-bottom: 1px solid #f5f5f5; font-size: 15px; }
        .side-cate li a:hover, .side-cate li a.active { background: #fdf2ed; color: var(--accent-orange); padding-left: 25px; }

        /* 定制咨询盒子 */
        .side-consult { padding: 30px 20px; background: var(--bg-light); text-align: center; border: 1px solid #eee; border-radius: 4px; }
        .side-consult h4 { color: var(--main-blue); font-size: 18px; margin-bottom: 10px; }
        .side-consult p { font-size: 13px; color: #666; margin-bottom: 20px; line-height: 1.5; }
        .side-qr { width: 150px; height: 150px; margin: 0 auto 15px; background: #fff; padding: 10px; border: 1px solid #ddd; }
        .side-tel { font-size: 18px; font-weight: bold; color: var(--accent-orange); }

        /* --- 右侧内容区 --- */
        .detail-main { flex: 1; min-width: 0; }

        .product-top { display: flex; gap: 30px; margin-bottom: 40px; }
        .gallery-part { width: 420px; flex-shrink: 0; }
        .big-img { border: 1px solid #eee; padding: 5px; border-radius: 4px; margin-bottom: 15px; }
        .thumbs { display: flex; gap: 10px; }
        .thumbs img { width: 75px; height: 75px; border: 1px solid #eee; cursor: pointer; padding: 3px; }
        .thumbs img.active { border-color: var(--accent-orange); }

        .info-part { flex: 1; }
        .info-part h1 { font-size: 26px; color: #222; margin-bottom: 20px; line-height: 1.3; }
        .spec-brief { background: #f9f9f9; padding: 20px; border-radius: 4px; margin-bottom: 20px; }
        .spec-line { font-size: 14px; margin-bottom: 10px; }
        .spec-line span { color: #888; margin-right: 10px; }

        .btn-wrap { display: flex; gap: 15px; margin-top: 30px; }
        .btn-buy { background: var(--accent-orange); color: #fff; padding: 12px 30px; border-radius: 4px; font-weight: bold; text-align: center; flex: 1; }
        .btn-call { border: 1px solid var(--main-blue); color: var(--main-blue); padding: 12px 30px; border-radius: 4px; text-align: center; flex: 1; }

        /* 选项卡 Tabs */
        .detail-tabs { border-bottom: 2px solid #eee; margin-top: 50px; display: flex; }
        .tab-btn { padding: 12px 30px; cursor: pointer; font-weight: bold; position: relative; }
        .tab-btn.active { color: var(--main-blue); }
        .tab-btn.active::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px; background: var(--main-blue); }
        
        .tab-pane { padding: 30px 0; display: none; }
        .tab-pane.active { display: block; }
        
        /* 表格 */
        .table-spec { width: 100%; border-collapse: collapse; }
        .table-spec td, .table-spec th { border: 1px solid #eee; padding: 12px; font-size: 14px; }
        .table-spec th { background: #fcfcfc; width: 200px; text-align: left; color: #666; font-weight: normal; }

        /* --- 4. 底部 (复刻版) --- */
        /* --- 底部 (复刻截图样式) --- */
        footer { background-color: #1a1a1a; color: #fff; padding: 60px 0 20px; }
        .footer-container { display: flex; justify-content: space-between; gap: 40px; }
        .footer-nav-grid { display: grid; grid-template-columns: repeat(4, auto); gap: 12px 30px; margin-top: 20px; }
        .footer-nav-grid a { color: #ccc; font-size: 14px; }
        .footer-center .qr-code-box { background: #fff; padding: 5px; width: 110px;margin: 0 auto; }
        .footer-right { text-align: right; }
        .contact-phone { font-size: 28px; font-weight: bold; color: #fff; }
        .footer-bottom { margin-top: 50px; padding-top: 20px; border-top: 1px solid #2d2d2d; color: #666; font-size: 12px; text-align: center; }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .footer-container { flex-direction: column; text-align: center; gap: 40px; }
            .footer-nav-grid {         justify-content: center;}
            .footer-right { text-align: center; }
            .sidebar { width: 100%; }
            .product-main { flex-direction: column; }
            .product-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .header-flex { flex-direction: column; gap: 10px; }
            .nav-list { overflow-x: auto; white-space: nowrap; justify-content: flex-start; }
            .product-grid { grid-template-columns: 1fr; }
            
        }
		

        /* --- 响应式 --- */
        @media (max-width: 992px) {
            .detail-wrapper { flex-direction: column; }
            .sidebar { width: 100%; order: 2; } /* 移动端侧边栏在底部 */
            .detail-main { order: 1; }
            .product-top { flex-direction: column; }
            .gallery-part { width: 100%; }
        }
        @media (max-width: 768px) {
            .footer-container { flex-direction: column; text-align: center; gap: 40px; }
            
            .header-flex { flex-direction: column; gap: 10px; }
            .nav-list { overflow-x: auto; white-space: nowrap; justify-content: flex-start; }
        }
		
		/* --- 留言板样式 --- */
.inquiry-form-section { 
    margin-top: 60px; 
    padding: 40px; 
    background: #f8f9fa; 
    border-radius: 8px; 
    border: 1px solid #eee; 
}
.inquiry-form-section h3 { 
    font-size: 22px; 
    color: var(--main-blue); 
    margin-bottom: 10px; 
    text-align: center;
}
.form-tip { 
    text-align: center; 
    font-size: 14px; 
    color: #888; 
    margin-bottom: 30px; 
}

.inquiry-form { max-width: 800px; margin: 0 auto; }
.form-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 20px; 
    margin-bottom: 20px; 
}

.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 14px; font-weight: bold; color: #444; }
.form-group label span { color: var(--accent-orange); }

.form-group input, .form-group textarea { 
    padding: 12px 15px; 
    border: 1px solid #ddd; 
    border-radius: 4px; 
    font-size: 14px; 
    outline: none; 
    transition: 0.3s;
}
.form-group input:focus, .form-group textarea:focus { 
    border-color: var(--main-blue); 
    box-shadow: 0 0 5px rgba(0,74,153,0.1); 
}

.full-width { grid-column: span 2; }

.form-submit { text-align: center; margin-top: 10px; }
.submit-btn { 
    background: var(--main-blue); 
    color: #fff; 
    padding: 15px 40px; 
    border: none; 
    border-radius: 4px; 
    font-size: 16px; 
    font-weight: bold; 
    cursor: pointer; 
    transition: 0.3s;
}
.submit-btn:hover { 
    background: var(--accent-orange); 
    box-shadow: 0 4px 10px rgba(255,106,0,0.3); 
}

/* 响应式留言板 */
@media (max-width: 768px) {
    .form-grid { grid-template-columns: 1fr; }
    .full-width { grid-column: span 1; }
    .inquiry-form-section { padding: 25px 15px; }
    .submit-btn { width: 100%; }
}