:root {
            --primary-color: #0056b3;
            --secondary-color: #17a2b8;
            --dark-color: #343a40;
            --light-color: #f8f9fa;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 84, 179, 0.8), rgba(23, 162, 184, 0.8)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=2072&q=80') no-repeat center center/cover;
            color: white;
            padding: 150px 0;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-bottom: 30px;
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 30px;
        }
        .btn-primary:hover {
            background-color: #004494;
            border-color: #004494;
        }
        .service-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .flink {
            display: inline-block;
            margin: 5px 10px;
            padding: 8px 15px;
            background: var(--light-color);
            border-radius: 5px;
            text-decoration: none;
            color: var(--dark-color);
            transition: var(--transition);
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
        }
        .hover-shadow:hover {
            box-shadow: 0 .5rem 1rem rgba(0,0,0,.15)!important;
        }
        .contact-info li {
            margin-bottom: 10px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }