:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #ffc107;
            --dark-color: #212529;
            --light-color: #f8f9fa;
        }
        body {
            font-family: 'Microsoft YaHei', sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
        }
        header {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1512917774080-9991f1c4c750?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80') no-repeat center center/cover;
            color: white;
            padding: 150px 0;
        }
        .navbar {
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .navbar-scrolled {
            background-color: rgba(255, 255, 255, 0.95) !important;
            padding: 10px 0;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 10px;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            color: var(--dark-color);
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            border: 5px solid var(--light-color);
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
        }
        .news-item {
            border-left: 4px solid var(--primary-color);
            padding-left: 20px;
            margin-bottom: 30px;
        }
        .contact-form .form-control {
            border-radius: 10px;
            border: 1px solid #ddd;
            padding: 15px;
            transition: all 0.3s;
        }
        .contact-form .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            border-radius: 50px;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
            transform: scale(1.05);
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 50px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 20px;
            padding: 10px 20px;
            background-color: white;
            border-radius: 10px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-5px);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
        }
        footer a {
            color: var(--light-color);
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .social-icons a {
            display: inline-block;
            margin: 0 10px;
            font-size: 1.5rem;
            color: white;
            transition: color 0.3s, transform 0.3s;
        }
        .social-icons a:hover {
            color: var(--accent-color);
            transform: scale(1.2);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
        }