/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
          .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }  
        /* 主要内容区 */
        .main-content {
            display: flex;
            margin: 20px 0;
        }
        
        /* 侧边栏 - 产品列表 */
        .sidebar {
            flex: 0 0 250px;
            background-color: white;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            padding: 20px;
            margin-right: 20px;
        }
        
        .sidebar h2 {
            color: #0066a1;
            border-bottom: 2px solid #0066a1;
            padding-bottom: 10px;
            margin-bottom: 15px;
        }
        
        .product-list {
            list-style: none;
        }
        
        .product-list li {
            margin-bottom: 10px;
        }
        
        .product-list a {
            display: block;
            padding: 10px;
            color: #333;
            text-decoration: none;
            border-radius: 3px;
            transition: all 0.3s;
        }
        
        .product-list a:hover, .product-list a.active {
            background-color: #e6f2ff;
            color: #0066a1;
            font-weight: bold;
        }
        
        /* 产品内容区 */
        .product-content {
            flex: 1;
            background-color: white;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            padding: 20px;
        }
        
        .breadcrumb {
            margin-bottom: 20px;
            color: #666;
            font-size: 14px;
        }
        
        .breadcrumb a {
            color: #0066a1;
            text-decoration: none;
        }
        
        .product-title {
            color: #0066a1;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e6f2ff;
        }
        
        .product-section {
            margin-bottom: 30px;
        }
        
        .product-section h3 {
            color: #0066a1;
            margin-bottom: 15px;
        }
        
        .product-section p {
            margin-bottom: 15px;
            text-align: justify;
        }
        
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 30px;
        }
        
        .pagination a {
            display: inline-block;
            padding: 8px 15px;
            margin: 0 5px;
            background-color: #f0f0f0;
            color: #333;
            text-decoration: none;
            border-radius: 3px;
            transition: all 0.3s;
        }
        
        .pagination a:hover {
            background-color: #0066a1;
            color: white;
        }
         
        /* 页面标题区域 */
        .page-header {
            background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), 
                        url('../chanpin_files/m_06.jpg');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        
        .page-header h2 {
            font-size: 36px;
            margin-bottom: 15px;
        }
        
        .page-header p {
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
        }
		/* 右侧产品详情 */
        .product-detail {
            flex: 1;
            background-color: white;
            border-radius: 5px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            overflow: hidden;
        }
        
        .product-header {
            padding: 25px 30px;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .product-header h3 {
            font-size: 24px;
            color: #003366;
            margin-bottom: 10px;
        }
        
        .product-meta {
            display: flex;
            gap: 20px;
            font-size: 14px;
            color: #666;
        }
        
        .product-body {
            padding: 30px;
        }
        
        .product-gallery {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .main-image {
            grid-column: 1 / -1;
            height: 350px;
            border-radius: 5px;
            overflow: hidden;
        }
        
        .main-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .thumbnails {
            display: flex;
            gap: 10px;
        }
        
        .thumbnail {
            flex: 1;
            height: 100px;
            border-radius: 5px;
            overflow: hidden;
            cursor: pointer;
            opacity: 0.7;
            transition: opacity 0.3s;
        }
        
        .thumbnail:hover, .thumbnail.active {
            opacity: 1;
        }
        
        .thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .product-info {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        
        .product-description h4, .product-specs h4 {
            font-size: 18px;
            color: #003366;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .product-description p {
            color: #666;
            line-height: 1.8;
            margin-bottom: 15px;
        }
        
        .spec-table {
            width: 100%;
            border-collapse: collapse;
        }

        
        .spec-table tr {
            border-bottom: 1px solid #f0f0f0;
        }
        
        .spec-table tr:last-child {
            border-bottom: none;
        }
        
        .spec-table td {
            padding: 12px 10px;
        }
        
        .spec-table td:first-child {
            font-weight: 500;
            color: #003366;
            width: 40%;
        }
        
        .spec-table td:last-child {
            color: #666;
        }
        
        .product-features {
            margin-top: 30px;
            padding: 25px;
            background-color: #f5f7fa;
            border-radius: 5px;
        }
        
        .product-features h4 {
            font-size: 18px;
            color: #003366;
            margin-bottom: 15px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
        }
        
        .feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .feature-icon {
            width: 40px;
            height: 40px;
            background-color: #e6f0ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0066cc;
            font-size: 18px;
        }
        
        .feature-text {
            font-size: 14px;
            color: #666;
        }
        
		
		
		
        /* 页脚 */
        footer {
            background-color: #333;
            color: white;
            padding: 30px 0;
            margin-top: 40px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
        }
        
        .footer-section {
            flex: 1;
            padding: 0 15px;
        }
        
        .footer-section h3 {
            margin-bottom: 15px;
            color: #0066a1;
        }
        
        .footer-bottom {
            text-align: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #444;
        }
        
		
        /* 顶部信息栏 */
        .top-bar {
            background-color: #004a8f;
            color: white;
            padding: 8px 0;
            font-size: 14px;
        }

        .top-bar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .top-links a {
            color: white;
            text-decoration: none;
            margin-left: 20px;
            transition: color 0.3s;
        }

        .top-links a:hover {
            color: #ffc107;
        }

        /* 导航栏样式 */
        .navbar {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .logo {
            font-size: 28px;
            font-weight: 600;
            color: #004a8f;
            text-decoration: none;
            display: flex;
            align-items: center;
        }

        .logo i {
            margin-right: 10px;
            color: #004a8f;
        }

        .nav-menu {
            display: flex;
            list-style: none;
        }

        .nav-item {
            position: relative;
            margin: 0 15px;
        }

        .nav-link {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            font-size: 18px;
            padding: 10px 0;
            display: flex;
            align-items: center;
            transition: color 0.3s;
        }

        .nav-link:hover {
            color: #004a8f;
        }

        .nav-link i {
            margin-left: 5px;
            font-size: 14px;
            transition: transform 0.3s;
        }

        .nav-item:hover .nav-link i {
            transform: rotate(180deg);
        }

        /* 下拉菜单样式 */
        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: white;
            min-width: 200px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
            z-index: 1000;
        }

        .nav-item:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-item {
            display: block;
            padding: 12px 20px;
            color: #333;
            text-decoration: none;
            border-bottom: 1px solid #f0f0f0;
            transition: all 0.3s;
        }

        .dropdown-item:hover {
            background-color: #f8f9fa;
            color: #004a8f;
            padding-left: 25px;
        }

        .dropdown-item:last-child {
            border-bottom: none;
        }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 24px;
            color: #004a8f;
        }

      
  
           
        /* 响应式设计 */
        @media (max-width: 992px) {
		
		    .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                background-color: white;
                width: 280px;
                height: 100vh;
                flex-direction: column;
                padding: 80px 20px 20px;
                transition: right 0.5s ease;
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
                overflow-y: auto;
            }

            .nav-menu.active {
                right: 0;
            }

            .nav-item {
                margin: 0;
                width: 100%;
            }

            .nav-link {
                padding: 15px 0;
                border-bottom: 1px solid #f0f0f0;
                width: 100%;
            }

            .dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                display: none;
                background-color: #f8f9fa;
                border-radius: 0;
                margin-left: 15px;
            }

            .nav-item.active .dropdown-menu {
                display: block;
            }

            .hamburger {
                display: block;
                z-index: 1001;
            }

            .dropdown-item {
                padding: 10px 15px;
            }
			
            .main-content {
                flex-direction: column;
            }
            
            .sidebar {
                flex: none;
                width: 100%;
                margin-right: 0;
                margin-bottom: 20px;
            }
            
            .footer-content {
                flex-direction: column;
            }
            
            .footer-section {
                margin-bottom: 20px;
            }
			   .page-header {
                padding: 60px 0;
            }
            
            .page-header h2 {
                font-size: 30px;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 15px;
                justify-content: center;
            }
            
            nav ul li {
                margin: 0 10px;
            }
			   .page-header {
                padding: 40px 0;
            }
            
            .page-header h2 {
                font-size: 26px;
            }
            
            .page-header p {
                font-size: 16px;
            }
            
            .section-title h3 {
                font-size: 24px;
            }
            
        }
        
        @media (max-width: 576px) {
		
		   .top-bar-content {
                flex-direction: column;
                gap: 10px;
            }
			
  .page-header h2 {
                font-size: 22px;
            }
            .top-links a {
                margin: 0 10px;
            }
            nav ul {
                flex-direction: column;
            }
            
            nav ul li {
                margin: 5px 0;
            }
        }