:root {
            --primary-color: #0056b3;
            --secondary-color: #e9f2ff;
            --accent-color: #ff6b35;
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            background: linear-gradient(90deg, var(--primary-color), #1a7fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 85, 179, 0.85), rgba(0, 85, 179, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
            color: var(--dark-color);
            font-weight: 700;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        .feature-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            height: 100%;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: all 0.4s ease;
            border: 1px solid #eaeaea;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,85,179,0.15);
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: var(--secondary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            color: var(--primary-color);
        }
        .product-card {
            border: 1px solid #e0e0e0;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s ease;
            background: white;
        }
        .product-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 10px 25px rgba(0,85,179,0.1);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .process-step {
            text-align: center;
            padding: 2rem 1rem;
            position: relative;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            margin: 0 auto 1.5rem;
        }
        .contact-info-box {
            background: var(--secondary-color);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            transition: all 0.3s ease;
        }
        .contact-info-box:hover {
            background: #dbe9ff;
            transform: translateY(-5px);
        }
        footer {
            background: var(--dark-color);
            color: #ddd;
            padding-top: 3rem;
        }
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink {
            background: #f9f9f9;
            border-radius: 10px;
            padding: 2rem;
            margin-top: 2rem;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.6rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            border: 1px solid #e0e0e0;
            color: #555;
            text-decoration: none;
            font-size: 0.9rem;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: scale(1.05);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            opacity: 0.8;
            z-index: 1000;
            transition: all 0.3s;
        }
        .back-to-top:hover {
            opacity: 1;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 5rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }