@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Inter', system-ui, sans-serif;
            background-color: #F8FAFC;
            color: #1E293B;
            scroll-behavior: smooth;
        }
        
        .hero-section {
            background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-pattern {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.05;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(255,255,255,0.3) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(255,255,255,0.2) 0%, transparent 30%);
        }
        
        .hero-content {
            background: radial-gradient(circle at top right, rgba(255,255,255,0.1) 0%, transparent 40%);
        }
        
        .service-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 16px;
            margin-bottom: 20px;
            font-size: 24px;
            color: white;
            transition: all 0.4s ease;
        }
        
        .feature-card {
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .feature-card:hover .service-icon {
            transform: scale(1.1);
        }
        
        .feature-badge {
            position: absolute;
            top: 20px;
            right: -30px;
            background: #EF4444;
            color: white;
            padding: 5px 40px;
            font-size: 12px;
            font-weight: bold;
            transform: rotate(45deg);
            letter-spacing: 1px;
        }
        
        .portfolio-item {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            height: 300px;
        }
        
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(37, 99, 235, 0.85);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 20px;
            text-align: center;
            color: white;
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        
        .portfolio-item:hover img {
            transform: scale(1.05);
        }
        
        .card-hover {
            transition: all 0.3s ease;
        }
        
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }
        
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: all 0.3s ease;
        }
        
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
            transform: scale(1.05);
        }
        
        .contact-form input,
        .contact-form textarea {
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            padding: 12px 16px;
            width: 100%;
            transition: all 0.3s ease;
        }
        
        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: #3B82F6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
            outline: none;
        }
        
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #3B82F6;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.3s ease;
            z-index: 1000;
            box-shadow: 0 4px 6px rgba(37, 99, 235, 0.3);
        }
        
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .section-title {
            position: relative;
            display: inline-block;
            margin-bottom: 40px;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: #3B82F6;
            border-radius: 2px;
        }
        
        .scroll-indicator {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 50px;
            border: 2px solid rgba(255,255,255,0.5);
            border-radius: 50px;
        }
        
        .scroll-indicator:before {
            content: '';
            position: absolute;
            top: 10px;
            left: 50%;
            width: 6px;
            height: 6px;
            background: white;
            border-radius: 50%;
            transform: translateX(-50%);
            animation: scroll 2s infinite;
        }
        
        @keyframes scroll {
            0% {
                transform: translate(-50%, 0);
                opacity: 0;
            }
            40% {
                opacity: 1;
            }
            80% {
                transform: translate(-50%, 15px);
                opacity: 0;
            }
            100% {
                opacity: 0;
            }
        }
        
        .stats-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: #3B82F6;
            margin-bottom: 8px;
        }
        
        .demo-ribbon {
            position: fixed;
            top: 0;
            right: 0;
            width: 150px;
            height: 150px;
            overflow: hidden;
            z-index: 9999;
            pointer-events: none;
        }
        
        .demo-ribbon span {
            position: absolute;
            display: block;
            width: 225px;
            padding: 15px 0;
            background-color: #F59E0B;
            box-shadow: 0 5px 10px rgba(0,0,0,.1);
            color: #fff;
            font-size: 13px;
            text-align: center;
            right: -45px;
            top: 30px;
            transform: rotate(45deg);
            font-weight: bold;
            letter-spacing: 1px;
        }
                /* 保留原有的所有样式 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: 'Inter', system-ui, sans-serif;
            background-color: #F8FAFC;
            color: #1E293B;
            scroll-behavior: smooth;
        }
        
        /* 新增的产品列表样式 */
        .product-card {
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
            background: white;
            position: relative;
        }
        
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .product-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: #EF4444;
            color: white;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: bold;
            border-radius: 20px;
            letter-spacing: 1px;
            z-index: 2;
        }
        
        .product-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .product-card:hover .product-image img {
            transform: scale(1.05);
        }
        
        .product-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 15px;
            background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
            color: white;
        }
        
        .product-content {
            padding: 20px;
        }
        
        .product-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }
        
        .product-tag {
            background-color: #EFF6FF;
            color: #3B82F6;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .product-grid {
                grid-template-columns: 1fr;
            }
            
            .product-image {
                height: 180px;
            }
        }
        
        @media (min-width: 769px) and (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }