* { 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 {
            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;
        }	

        .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;
        }

        .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;
        }

        .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; }
        
        .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 */
        .page-banner {
            /*background-image: url('img/products-banner.jpg');*/
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 100px 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, 0.5);
        }
        .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: 1200px;
            margin: 0 auto;
            padding: 40px 24px;
        }
        
        /* 面包屑 */
        .breadcrumb {
            margin-bottom: 30px;
            font-size: 14px;
            color: #5f6368;
        }
        .breadcrumb a {
            color: #5f6368;
            text-decoration: none;
        }
        .breadcrumb a:hover { color: #0078d4; }
        .breadcrumb span { margin: 0 8px; }
        
        /* 产品卡片容器 */
        .product-card {
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            margin-bottom: 40px;
            padding: 40px;
        }
        
        /* 产品头部信息行 */
        .product-header {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
            padding-bottom: 20px;
            margin-bottom: 30px;
            border-bottom: 1px solid #e5e5e5;
        }
        
        .product-code {
            font-size: 14px;
            color: #5f6368;
        }
        .product-code i { margin-right: 8px; color: #0078d4; }
        
        .product-category i { margin-right: 8px; color: #0078d4; }
        .product-category a {
            color: #0078d4;
            text-decoration: none;
        }
        .product-category a:hover { text-decoration: underline; }
        
        /* 产品名称 */
        .product-name {
            text-align: center;
            margin-bottom: 30px;
        }
        .product-name h1 {
            font-size: 28px;
            font-weight: 600;
            color: #202124;
        }
        
        /* 图片区域 - 居中显示 */
        .product-image-wrapper {
            text-align: center;
            margin-bottom: 40px;
        }
        .product-image {
            display: inline-block;
            max-width: 100%;
           
            border-radius: 16px;
            overflow: hidden;
        }
        .product-image img {
            max-width: 100%;
            height: auto;
            max-height: 500px;
            object-fit: contain;
            display: block;
        }
        
        /* 产品描述区域 */
        .product-description {
            border-top: 1px solid #e5e5e5;
            padding-top: 30px;
        }
        .product-description h3 {
            font-size: 20px;
            font-weight: 600;
            color: #0078d4;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .product-description h3 i { font-size: 24px; }
        .product-description-content {
            color: #5f6368;
            line-height: 1.8;
            overflow-x: auto;
        }
        
        /* 表格样式 */
        .product-description-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }
        .product-description-content th,
        .product-description-content td {
            border: 1px solid #ddd;
            padding: 10px 12px;
            text-align: center;
            vertical-align: middle;
        }
        .product-description-content th {
            background-color: #f5f5f5;
            font-weight: 600;
        }
        .product-description-content tr:hover {
            background-color: #fafafa;
        }
        
        /* 返回按钮 */
        .back-button {
            text-align: center;
            margin-top: 20px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: white;
            border: 1px solid #0078d4;
            color: #0078d4;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-outline:hover {
            background: #0078d4;
            color: white;
        }
        
        /* 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; }
        
        .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;
        }
        
        [dir="rtl"] .dropdown-menu { left: auto; right: 0; }
        [dir="rtl"] .footer-col ul li i { margin-right: 0; margin-left: 8px; }
        
        @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; }
            
            .page-banner { padding: 60px 24px; }
            .page-banner h1 { font-size: 28px; }
            .page-banner p { font-size: 14px; }
            
            .product-card { padding: 20px; }
            .product-name h1 { font-size: 22px; }
            
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-col ul li i { margin-right: 0; margin-left: 8px; }
            
            .product-description-content {
                overflow-x: auto;
            }
            .product-description-content table {
                min-width: 800px;
            }
            
            .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; }
        }