:root {
            --primary: #0056b3;
            --secondary: #003d82;
            --accent: #00a8e8;
            --light: #f8f9fa;
            --dark: #343a40;
            --gray: #6c757d;
        }
        
       
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
       
        
        /* 页面标题样式 */
        .page-header {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            padding: 60px 0;
            text-align: center;
            margin-bottom: 50px;
         }
        
        .page-header h1 {
            font-size: 36px;
            margin-bottom: 15px;
        }
        
        .breadcrumb {
            display: flex;
            justify-content: center;
            list-style: none;
            background-color: unset!important;
        }
        
        .breadcrumb li {
            margin: 0 5px;
        }
        
        .breadcrumb li a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
        }
        
        .breadcrumb li:after {
            content: '>';
            margin-left: 10px;
            color: rgba(255,255,255,0.6);
        }
        
        .breadcrumb li:last-child:after {
            content: '';
        }
        
        .breadcrumb li.active a {
            color: white;
            font-weight: 500;
        }
        
        /* 公司简介样式 */
        .company-intro {
            display: flex;
            align-items: center;
            margin-bottom: 70px;
            gap: 40px;
        }
        
        .intro-img {
            flex: 1;
            height: 400px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            background: linear-gradient(45deg, #f0f8ff, #e6f7ff);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .intro-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .intro-content {
            flex: 1;
        }
        
        .intro-content h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .intro-content h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--accent);
        }
        
        .intro-content p {
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .hotline {
            display: inline-flex;
            align-items: center;
            background-color: var(--primary);
            color: white;
            padding: 10px 20px;
            border-radius: 4px;
            margin-top: 15px;
            font-weight: 500;
            text-decoration: none;
            transition: background-color 0.3s;
        }
        
        .hotline:hover {
            background-color: var(--secondary);
        }
        
        .hotline i {
            margin-right: 10px;
        }
        
        /* 公司优势样式 */
        .advantages {
            margin-bottom: 70px;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        
        .section-title h2 {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 10px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background-color: var(--accent);
        }
        
        .section-title p {
            color: var(--gray);
            max-width: 700px;
            margin: 20px auto 0;
        }
        
        .advantage-cards {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .advantage-card {
            flex: 1;
            min-width: 250px;
            background-color: white;
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .advantage-card:hover {
            transform: translateY(-5px);
        }
        
        .advantage-icon {
            width: 70px;
            height: 70px;
            background-color: var(--light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary);
            font-size: 30px;
        }
        
        .advantage-card h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .advantage-card p {
            color: var(--gray);
        }
        
        /* 产品展示样式 */
        .products {
            margin-bottom: 70px;
        }
        
        .product-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }
        
        .product-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        
        .product-card:hover {
            transform: translateY(-5px);
        }
        
        .product-img {
            height: 180px;
            background-color: #f5f7fa;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: linear-gradient(45deg, #f0f8ff, #e6f7ff);
        }
        
        .product-img img {
            max-width: 80%;
            max-height: 80%;
        }
        
        .product-info {
            padding: 20px;
            text-align: center;
        }
        
        .product-info h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--dark);
        }
        
        /* 认证资质样式 */
        .certifications {
            margin-bottom: 70px;
        }
        
        .cert-logos {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .cert-logo {
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: white;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        
        .cert-logo img {
            max-width: 100%;
            max-height: 100%;
            filter: grayscale(100%);
            transition: filter 0.3s;
        }
        
        .cert-logo:hover img {
            filter: grayscale(0%);
        }
        
        /* 发展历程样式 */
        .timeline {
            margin-bottom: 70px;
        }
        
        .timeline-container {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .timeline-container::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        
        .timeline-item:nth-child(odd) {
            left: 0;
        }
        
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        
        .timeline-content {
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        
        .timeline-content h3 {
            color: var(--primary);
            margin-bottom: 10px;
        }
        
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background-color: white;
            border: 4px solid var(--primary);
            border-radius: 50%;
            top: 15px;
            z-index: 1;
        }
        
        .timeline-item:nth-child(odd)::after {
            right: -10px;
        }
        
        .timeline-item:nth-child(even)::after {
            left: -10px;
        }
        
        /* 页脚样式 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 200px;
            margin-bottom: 30px;
            padding-right: 20px;
        }
        
        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--accent);
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 10px;
        }
        
        .footer-column ul li a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: white;
        }
        
        .contact-info {
            color: #bbb;
        }
        
        .contact-info p {
            margin-bottom: 10px;
            display: flex;
            align-items: flex-start;
        }
        
        .contact-info i {
            margin-right: 10px;
            color: var(--accent);
            margin-top: 3px;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #bbb;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .product-cards {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .company-intro {
                flex-direction: column;
            }
            
            .intro-img {
                width: 100%;
            }
            
            .timeline-container::after {
                left: 31px;
            }
            
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-item:nth-child(even) {
                left: 0;
            }
            
            .timeline-item::after {
                left: 21px;
            }
            
            .timeline-item:nth-child(odd)::after {
                right: auto;
            }
        }
        
        @media (max-width: 768px) {
             
            .product-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .page-header h1 {
                font-size: 28px;
            }
            
            .product-cards {
                grid-template-columns: 1fr;
            }
            
           
            
            .advantage-card {
                min-width: 100%;
            }
        }
  /* Tab标签样式 */
        .tab-container {
            margin-bottom: 50px;
        }
        
        .tab-header {
            display: flex;
            border-bottom: 2px solid #eee;
            margin-bottom: 30px;
        }
        
        .tab-btn {
            padding: 12px 25px;
            background: none;
            border: none;
            font-size: 18px;
            font-weight: 500;
            color: var(--gray);
            cursor: pointer;
            position: relative;
            transition: all 0.3s;
        }
        
        .tab-btn:hover {
            color: var(--primary);
        }
        
        .tab-btn.active {
            color: var(--primary);
        }
        
        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary);
        }
        
        .tab-content {
            display: none;
        }
        
        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }