* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', system-ui, 'Inter', sans-serif; background: #f5f5f5; color: #202124; line-height: 1.5; }
        .main-nav { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid #e5e5e5; }
        .nav-content { max-width: 1280px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; height: 64px; }
  
        /* Logo 样式 - 简洁现代风格 */
        .logo {
            font-size: 30px;
            font-weight: 700;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #0078d4 0%, #00a4ef 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }

        .logo::before {
            content: '';
            display: inline-block;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, #0078d4, #00a4ef);
            border-radius: 8px;
            position: relative;
            background-clip: unset;
            -webkit-background-clip: unset;
            color: white;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12 2L2 7l10 5 10-5-10-5zM2 17l10 5 10-5M2 12l10 5 10-5'/%3E%3C/svg%3E");
            background-size: 20px;
            background-repeat: no-repeat;
            background-position: center;
        }

        .logo:hover {
            background: linear-gradient(135deg, #005a9e 0%, #0078d4 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }	

        /* 导航菜单 - 从左到右展开 */
        .nav-menu { 
            display: flex; 
            gap: 32px; 
            list-style: none; 
            margin: 0;
            padding: 0;
        }

        .nav-menu a { 
            text-decoration: none; 
            color: #202124; 
            font-weight: 500; 
            font-size: 15px;
            position: relative;
            padding: 8px 0;
            transition: color 0.3s ease;
            display: inline-block;
        }

        /* 下划线 - 从左到右 */
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #0078d4, #00a4ef);
            transition: width 0.3s ease;
            border-radius: 2px;
        }

        /* 悬停时下划线展开 */
        .nav-menu a:hover::after {
            width: 100%;
        }

        .nav-menu a:hover { 
            color: #0078d4;
        }

        .nav-menu a.active { 
            color: #0078d4;
            font-weight: 600;
        }
        
        .nav-right { display: flex; align-items: center; gap: 20px; }
        .dropdown { position: relative; }
        .dropdown > a { display: flex; align-items: center; gap: 6px; }
        .dropdown-icon { font-size: 12px; }
        .dropdown-menu { position: absolute; top: 100%; left: 0; background: white; border-radius: 12px; box-shadow: 0 8px 28px rgba(0,0,0,0.12); min-width: 220px; opacity: 0; visibility: hidden; transition: all 0.2s; z-index: 100; border: 1px solid #e5e5e5; }
        .dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; }
        .dropdown-item > a { display: block; padding: 12px 20px; color: #202124; text-decoration: none; font-size: 14px; }
        .dropdown-item > a:hover { background: #f0f0f0; }
        
        /* 导航栏语言选择器样式 */
        .language-selector {
            position: relative;
        }
        .lang-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: #f0f0f0;
            border: 1px solid #ddd;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.2s;
            font-family: inherit;
        }
        .lang-btn:hover {
            background: #e8e8e8;
            border-color: #0078d4;
        }
        .lang-dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            background: white;
            border-radius: 12px;
            box-shadow: 0 8px 28px rgba(0,0,0,0.12);
            min-width: 180px;
            max-height: 400px;
            overflow-y: auto;
            opacity: 0;
            visibility: hidden;
            transition: all 0.2s;
            z-index: 1000;
            border: 1px solid #e5e5e5;
            margin-top: 1px;
        }
        .language-selector:hover .lang-dropdown-menu {
            opacity: 1;
            visibility: visible;
        }
        .lang-option {
            display: block;
            padding: 12px 20px;
            text-decoration: none;
            color: #202124;
            font-size: 14px;
            transition: background 0.2s;
            white-space: nowrap;
        }
        .lang-option:hover {
            background: #f5f5f5;
        }
        .lang-option.active {
            background: #0078d4;
            color: white;
        }
        
        .mobile-menu-btn { display: none; font-size: 24px; cursor: pointer; background: none; border: none; }
        
        /* 页面横幅 - 使用背景图片 */
        .page-banner {
            /*background-image: url('img/about-banner.jpg');*/
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 95px 24px;
            text-align: center;
            position: relative;
        }
        
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.3);
        }
        
        .page-banner h1 {
            font-size: 48px;
            font-weight: 600;
            color: white;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        
        .page-banner p {
            font-size: 18px;
            color: rgba(255,255,255,0.9);
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        /* 主要内容区域 */
        .main-content { max-width: 1280px; margin: 0 auto; padding: 40px 24px; display: grid; grid-template-columns: 280px 1fr; gap: 40px; }
        
        /* 侧边栏 */
        .sidebar { background: white; border-radius: 16px; padding: 24px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); height: fit-content; position: sticky; top: 80px; }
        .sidebar-title { font-size: 18px; font-weight: 600; color: #202124; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid #0078d4; display: flex; align-items: center; gap: 8px; }
        .category-tree { list-style: none; }
        .category-tree li { margin-bottom: 8px; }
        .category-tree .category-item { display: block; padding: 10px 12px; color: #5f6368; text-decoration: none; border-radius: 8px; transition: all 0.2s; font-size: 14px; }
        .category-tree .category-item:hover { background: #f0f7ff; color: #0078d4; }
        .category-tree .category-item.active { background: #0078d4; color: white; }
        .category-tree .children { list-style: none; padding-left: 24px; margin-top: 8px; }
        
        /* 面包屑 */
        .breadcrumb { margin-bottom: 24px; font-size: 14px; color: #5f6368; }
        .breadcrumb a { color: #5f6368; text-decoration: none; }
        .breadcrumb a:hover { color: #0078d4; }
        .breadcrumb span { margin: 0 8px; }
        
        /* 分类标题 */
        .category-title { font-size: 28px; font-weight: 600; color: #202124; margin-bottom: 24px; }
        
        /* 子分类 */
        .subcategories { margin-bottom: 40px; }
        .subcategories-title { font-size: 18px; font-weight: 600; color: #202124; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
        .subcategory-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
        .subcategory-card { background: white; border: 1px solid #e5e5e5; border-radius: 12px; padding: 16px; text-align: center; text-decoration: none; transition: all 0.2s; }
        .subcategory-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); border-color: #0078d4; }
        .subcategory-name { font-size: 16px; font-weight: 500; color: #202124; margin-bottom: 8px; }
        .subcategory-count { font-size: 12px; color: #5f6368; }
        
        /* 产品网格 */
        .product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
        .product-card { background: white; border-radius: 16px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.05); transition: all 0.3s; cursor: pointer; }
        .product-card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(0,0,0,0.1); }
        .product-image { width: 100%;  overflow: hidden; background: #f5f5f5; display: flex; align-items: center; justify-content: center; }
        .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
        .product-card:hover .product-image img { transform: scale(1.05); }
        .product-info { padding: 20px; }
        /*.product-code { font-size: 12px; color: #5f6368; margin-bottom: 8px;  text-align: center;}*/
        .product-name { font-size: 18px; font-weight: 600; color: #202124; margin-bottom: 12px; line-height: 1.4; height: 50px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
        .product-desc { font-size: 13px; color: #5f6368; line-height: 1.6; margin-bottom: 16px; height: 60px; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
        .product-meta { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #e5e5e5; padding-top: 16px; }
        .product-langs { display: flex; gap: 4px; flex-wrap: wrap; }
        .view-details { color: #0078d4; font-size: 13px; font-weight: 500; display: flex; align-items: center; gap: 4px; }
/* 产品编号容器 - 居中 */
.product-code {
    text-align: center;  /* 文本居中 */
}

/* 产品编号超链接样式 */
.product-code-link {
    display: inline-block;  /* 改为inline-block，配合text-align居中 */
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: #2c3e50;
    padding: 6px 20px;      /* 增加左右内边距 */
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    border: 1px solid #dee2e6;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.product-code-link:hover {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border-color: #007bff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,123,255,0.25);
    text-decoration: none;
}

.product-code-link:active {
    transform: translateY(0px);
}

	/* 产品编号超链接样式 */
.product-code-link {
    display: inline-block;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: #2c3e50;
    padding: 6px 14px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: all 0.3s ease;
    border: 1px solid #dee2e6;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
	text-align: center;
}

.product-code-link:hover {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border-color: #007bff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,123,255,0.25);
    text-decoration: none;
}

.product-code-link:active {
    transform: translateY(0px);
    transition: all 0.05s ease;
}

/* 可选：添加一个复制图标提示 */

.product-code-link:hover::after {
    opacity: 1;
}







        
        /* 分页 */
        .pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
        .page-link { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 10px; background: white; border: 1px solid #e5e5e5; border-radius: 8px; color: #202124; text-decoration: none; font-size: 14px; transition: all 0.2s; }
        .page-link:hover { background: #f0f7ff; border-color: #0078d4; color: #0078d4; }
        .page-link.active { background: #0078d4; border-color: #0078d4; color: white; }
        .page-link.disabled { opacity: 0.5; cursor: not-allowed; }
        .page-dots { padding: 0 8px; color: #5f6368; }
        
        /* 空状态 */
        .empty-state { text-align: center; padding: 60px 20px; background: white; border-radius: 16px; }
        .empty-state i { font-size: 64px; color: #ccc; margin-bottom: 20px; }
        .empty-state h3 { font-size: 20px; color: #202124; margin-bottom: 8px; }
        .empty-state p { color: #5f6368; }
        
        /* 页脚 */
        .footer {
            background: #1a1a1a;
            color: #e5e5e5;
            padding: 60px 24px 30px;
            margin-top: 60px;
        }
        
        .footer-grid {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 48px;
        }
        
        .footer-col h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            color: white;
        }
        
        .footer-col p {
            color: #aaa;
            line-height: 1.6;
            margin-bottom: 12px;
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col ul li {
            margin-bottom: 12px;
        }
        
        .footer-col ul li a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .footer-col ul li a:hover {
            color: #0078d4;
        }
        
        .footer-col ul li i {
            width: 24px;
            margin-right: 8px;
        }
        
        .social-icons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 15px;
        }
        
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            transition: all 0.3s;
            text-decoration: none;
        }
        
        .social-icon:hover {
            transform: translateY(-3px);
            opacity: 0.9;
        }
        
        /* 语言切换按钮 */
        .lang-toggle-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #0078d4;
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 15px;
            transition: all 0.3s;
            border: none;
        }
        .lang-toggle-btn:hover {
            background: #005a9e;
            transform: translateY(-2px);
        }
        
        .footer-languages {
            margin-top: 30px;
            padding-top: 30px;
            border-top: 1px solid #333;
            text-align: center;
        }
        
        .lang-links {
            display: none;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 15px;
        }
        
        .lang-link {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(255,255,255,0.1);
            border-radius: 25px;
            color: #aaa;
            text-decoration: none;
            font-size: 13px;
            transition: all 0.2s;
        }
        
        .lang-link:hover {
            background: #0078d4;
            color: white;
        }
        
        .lang-link.active {
            background: #0078d4;
            color: white;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #333;
            color: #888;
            font-size: 13px;
        }
        
        /* RTL 支持 */
        [dir="rtl"] .dropdown-menu { left: auto; right: 0; }
        [dir="rtl"] .category-tree .children { padding-left: 0; padding-right: 24px; }
        [dir="rtl"] .footer-col ul li i { margin-right: 0; margin-left: 8px; }
        
        /* 响应式 */
        @media (max-width: 768px) {
            .mobile-menu-btn { display: block; }
            .nav-menu { position: fixed; top: 64px; left: -100%; width: 100%; height: calc(100vh - 64px); background: white; flex-direction: column; padding: 24px; gap: 20px; transition: left 0.3s; z-index: 999; }
            .nav-menu.active { left: 0; }
            .dropdown-menu { position: static; opacity: 1; visibility: visible; box-shadow: none; display: none; margin-top: 8px; padding-left: 20px; }
            .dropdown.active .dropdown-menu { display: block; }
            .main-content { grid-template-columns: 1fr; padding: 24px; }
            .sidebar { position: static; margin-bottom: 24px; }
            .page-banner { padding: 80px 24px; }
            .page-banner h1 { font-size: 32px; }
            .page-banner p { font-size: 14px; }
            .product-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-col ul li i { margin-right: 0; margin-left: 8px; }
            .lang-links { gap: 8px; }
            .lang-link { padding: 4px 10px; font-size: 11px; }
            
            .lang-dropdown-menu {
                position: fixed;
                top: auto;
                bottom: 0;
                left: 0;
                right: 0;
                width: 100%;
                border-radius: 20px 20px 0 0;
                max-height: 60vh;
            }
            .language-selector:hover .lang-dropdown-menu {
                opacity: 0;
                visibility: hidden;
            }
            .lang-dropdown-menu.show {
                opacity: 1 !important;
                visibility: visible !important;
            }
        }