:root {
            --primary-color: #0a5c8c;
            --secondary-color: #e67e22;
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
            --success-color: #28a745;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 92, 140, 0.85), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
            text-align: center;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 8px;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--secondary-color);
            left: 0;
            bottom: 0;
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .product-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s ease;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .bg-light-blue {
            background-color: #eef7ff;
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.8rem;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 20px;
        }
        .process-step .step-number {
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 1rem;
            font-size: 1.3rem;
        }
        .contact-info-box {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
            transition: transform 0.3s ease;
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
        }
        .contact-icon {
            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;
            margin-bottom: 1.5rem;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f1f8ff;
            border-radius: 5px;
            color: var(--primary-color);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #d1e7ff;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background: var(--dark-color);
            color: #ddd;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .cert-badge {
            display: inline-block;
            padding: 5px 15px;
            background: #e7f5ff;
            border-radius: 20px;
            color: var(--primary-color);
            font-size: 0.9rem;
            margin: 0 5px 5px 0;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }