:root {
            --primary-color: #3CA9E1;
            --text-color: #333;
            --text-light: #666;
            --bg-light: #f0f4f8;
            --white: #ffffff;
            --section-padding: 100px 0;
            --container-width: 1450px;
            --border-radius: 12px;
            --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
            scroll-behavior: smooth;
            background-color: var(--bg-light);
        }
        
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Section common styles */
        .section {
            padding: var(--section-padding);
            opacity: 0;
            transform: translateY(50px);
            transition: opacity 0.8s ease, transform 0.8s ease;
            position: relative;
            will-change: transform, opacity;
        }
        
        .section.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* About Us Section */
        .about-us {
            position: relative;
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
            padding: 120px 0;
        }
        
        .about-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            max-width: 1300px;
            margin: 0 auto;
        }
        
        .about-content h2 {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 30px;
            color: var(--text-color);
            line-height: 1.2;
            position: relative;
            display: inline-block;
        }
        
        .about-content h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        
        .about-content > p {
            font-size: 16px;
            margin-bottom: 60px;
            line-height: 1.8;
            color: var(--text-light);
            max-width: 800px;
        }
        
        .about-media {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            width: 100%;
            margin-bottom: 60px;
            align-items: stretch;
        }
        
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        
        .video-container video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .about-text {
            text-align: left;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .about-text p {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        
        .about-text p:last-child {
            margin-bottom: 0;
        }
        
        /* Responsive design for About Us section */
        @media (max-width: 1024px) {
            .about-us {
                padding: 100px 0;
            }
            
            .about-content h2 {
                font-size: 40px;
            }
            
            .about-media {
                grid-template-columns: 1fr;
                gap: 50px;
            }
            
            .about-text {
                text-align: center;
            }
        }
        
        @media (max-width: 768px) {
            .about-us {
                padding: 60px 0;
            }
            
            .about-content h2 {
                font-size: 32px;
                margin-bottom: 15px;
            }
            
            .about-content > p {
                font-size: 16px;
                margin: 5px 0 20px;
            }
            
            .about-text p {
                font-size: 15px;
                line-height: 1.6;
            }
            
            .about-media {
                gap: 20px;
                margin-bottom: 30px;
            }
        }
        
        @media (max-width: 480px) {
            .about-us {
                padding: 40px 0;
            }
            
            .about-content h2 {
                font-size: 28px;
            }
            
            .about-content > p {
                font-size: 15px;
                margin-bottom: 20px;
            }
            
            .about-media {
                gap: 20px;
                margin-bottom: 30px;
            }
        }
        
        /* Product Center Section */
        .product-center {
            background-color: var(--bg-light);
            position: relative;
            padding-bottom: 20px;
        }
        
        .product-center::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background-color: var(--primary-color);
        }
        
        .product-header {
            text-align: center;
            margin-bottom: 0;
            padding-top: 40px;
        }
        
        .product-header h2 {
            font-size: 48px;
            font-weight: 700;
            color: var(--text-color);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }
        
        .product-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        
        .product-header p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .btn {
            display: inline-block;
            padding: 14px 28px;
            background-color: var(--primary-color);
            color: var(--white);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(60, 169, 225, 0.3);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .btn:hover {
            background-color: #2b93c6;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(60, 169, 225, 0.4);
        }
        
        .products-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .product-item {
            background-color: var(--white);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--box-shadow);
            position: relative;
        }
        
        .product-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: var(--primary-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        
        .product-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        
        .product-item:hover::before {
            transform: scaleX(1);
        }
        
        .product-image {
            position: relative;
            overflow: hidden;
            height: 280px;
        }
        
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .product-item:hover .product-image img {
            transform: scale(1.1);
        }
        
        .product-info {
            padding: 20px;
        }
        
        .product-info h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-color);
            line-height: 1.4;
        }
        
        .product-overlay {
            position: absolute;
            bottom: -100%;
            left: 0;
            width: 100%;
            background-color: rgba(60, 169, 225, 0.9);
            color: var(--white);
            padding: 20px;
            transition: bottom 0.3s ease;
        }
        
        .product-item:hover .product-overlay {
            bottom: 0;
        }
        
        .product-overlay a {
            color: var(--white);
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            margin-top: 10px;
        }
        
        .product-overlay a:hover {
            text-decoration: underline;
        }
        
        /* Comprehensive Solutions Section */
        .solutions {
            background-color: var(--bg-light);
            text-align: center;
        }
        
        .solutions h2 {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-color);
            position: relative;
            display: inline-block;
        }
        
        .solutions h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        
        .solutions p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 80px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 50px;
        }
        
        .solution-item {
            padding: 50px 30px;
            border-radius: var(--border-radius);
            transition: var(--transition);
            background-color: var(--white);
            box-shadow: var(--box-shadow);
            position: relative;
            overflow: hidden;
        }
        
        .solution-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background-color: var(--primary-color);
        }
        
        .solution-item:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }
        
        .solution-icon {
            width: 100px;
            height: 100px;
            margin: 0 auto 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 40px;
            background-color: rgba(60, 169, 225, 0.1);
            border-radius: 50%;
            transition: var(--transition);
        }
        
        .solution-item:hover .solution-icon {
            background-color: var(--primary-color);
            color: var(--white);
            transform: scale(1.1);
        }
        
        .solution-item h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-color);
        }
        
        .solution-item p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.7;
        }
        
        /* Technological Innovation Section */
        .innovation {
            background-color: var(--white);
            text-align: center;
            padding: 120px 0;
            position: relative;
        }
        
        .innovation::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background-color: var(--primary-color);
        }
        
        .innovation h2 {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--text-color);
            position: relative;
            display: inline-block;
        }
        
        .innovation h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        
        .innovation p {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 80px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .innovation-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            grid-template-rows: repeat(3, 250px);
            gap: 20px;
        }
        
        .innovation-item {
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--box-shadow);
            position: relative;
            cursor: pointer;
        }
        
        .innovation-item:nth-child(1) {
            grid-row: span 2;
        }
        
        .innovation-item:nth-child(4) {
            grid-row: span 2;
        }
        
        .innovation-item:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .innovation-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.7s ease;
        }
        
        .innovation-item:hover img {
            transform: scale(1.1);
        }
        

        
        /* 10 Years Industry Leading Section */
        .industry-leading {
            position: relative;
            background-color: var(--white);
            color: var(--text-color);
            padding: 120px 0;
        }
        
        .industry-leading::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background-color: var(--primary-color);
        }
        
        .industry-content {
            position: relative;
        }
        
        .industry-header {
            text-align: center;
            margin-bottom: 80px;
        }
        
        .industry-header .tag {
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 15px;
            letter-spacing: 2px;
            color: var(--primary-color);
            display: inline-block;
            padding: 8px 20px;
            background-color: rgba(60, 169, 225, 0.1);
            border-radius: 20px;
        }
        
        .industry-header h2 {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 30px;
            line-height: 1.1;
            color: var(--text-color);
        }
        
        .industry-stats {
            display: flex;
            justify-content: space-between;
            gap: 30px;
            margin-top: 60px;
        }
        
        .stat-item {
            flex: 1;
            padding: 40px 30px;
            border-radius: var(--border-radius);
            background-color: var(--bg-light);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        /* Responsive design for industry-leading section */
        @media (max-width: 768px) {
            .industry-stats {
                flex-direction: column;
                gap: 20px;
                margin-top: 40px;
            }
            
            .stat-item {
                padding: 30px 20px;
            }
            
            .industry-header h2 {
                font-size: 32px;
                line-height: 1.2;
            }
        }
        
        @media (max-width: 480px) {
            .industry-header h2 {
                font-size: 28px;
            }
            
            .stat-number {
                font-size: 36px;
            }
        }
        
        .stat-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        
        .stat-item:hover {
            transform: translateY(-10px);
            box-shadow: var(--box-shadow);
        }
        
        .stat-item:hover::before {
            transform: scaleX(1);
        }
        
        .stat-number {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary-color);
            line-height: 1;
        }
        
        .stat-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-color);
        }
        
        .stat-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.5;
        }
        
        /* Company Info Section */
        .company-info {
            background-color: var(--white);
            text-align: center;
            padding: 60px 0;
            border-top: 1px solid #eaeaea;
        }
        
        .company-info h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-color);
        }
        
        .company-info p {
            font-size: 18px;
            color: var(--text-light);
            margin: 0;
        }
        
        /* Responsive Design */
        @media (max-width: 1450px) {
            :root {
                --container-width: 1200px;
            }
        }
        
        @media (max-width: 1200px) {
            :root {
                --container-width: 992px;
            }
            
            .solutions-grid {
                grid-template-columns: repeat(1, 1fr);
            }
            
            .products-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .about-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 21px;
            }
            
            .innovation-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            :root {
                --container-width: 768px;
                --section-padding: 80px 0;
            }
            
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .industry-stats {
                grid-template-columns: repeat(1, 1fr);
            }
            
            .about-left h2,
            .solutions h2,
            .industry-header h2 {
                font-size: 36px;
            }
        }
        
        @media (max-width: 768px) {
            :root {
                --container-width: 100%;
                --section-padding: 60px 0;
            }
            
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            
            .innovation-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            
            .about-left h2,
            .solutions h2,
            .innovation h2,
            .industry-header h2,
            .product-header h2 {
                font-size: 32px;
            }
            
            .solution-item,
            .stat-item {
                padding: 30px 20px;
            }
            
            /* 移动端去除图片鼠标上移效果 */
            .product-item:hover {
                transform: none;
                box-shadow: var(--box-shadow);
            }
            
            .product-item:hover .product-image img {
                transform: none;
            }
            
            .product-overlay {
                display: none;
            }
        }
        
        @media (max-width: 480px) {
            .products-grid {
                grid-template-columns: 1fr;
            }
            
            .product-item:hover {
                transform: none;
                box-shadow: var(--box-shadow);
            }
            
            .product-item:hover .product-image img {
                transform: none;
            }
            
            .product-overlay {
                display: none;
            }
        }