:root {
            --primary-color: #1a5f7a;
            --secondary-color: #ff7e30;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .navbar-brand i {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color);
            margin: 0 5px;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color);
            background-color: rgba(26, 95, 122, 0.1);
        }
        .hero {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1623298317882-8e6a6c6b7e6b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #e56a1a;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(255, 126, 48, 0.4);
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            color: var(--primary-color);
            font-weight: 700;
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            margin: 15px auto;
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .service-card img {
            height: 220px;
            object-fit: cover;
        }
        .service-card .card-body {
            padding: 25px;
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(26, 95, 122, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: -40px auto 20px;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .stats {
            background-color: var(--primary-color);
            color: white;
            padding: 60px 0;
        }
        .stat-item h3 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .testimonial-card {
            background-color: var(--light-color);
            border-left: 5px solid var(--secondary-color);
            padding: 25px;
            border-radius: 5px;
            margin-bottom: 30px;
        }
        .testimonial-card img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
        }
        .friendlink {
            background-color: #f1f5f9;
            padding: 50px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 10px 20px;
            margin: 8px;
            border-radius: 5px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #ddd;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1rem;
            }
            section {
                padding: 50px 0;
            }
        }