:root {
            --primary-color: #4a90e2;
            --secondary-color: #f8b195;
            --accent-color: #355c7d;
            --light-color: #f9f9f9;
            --dark-color: #333;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
            background-color: var(--light-color);
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: var(--accent-color) !important;
        }
        .hero {
            background: linear-gradient(rgba(74, 144, 226, 0.8), rgba(53, 92, 125, 0.9)), url('https://images.unsplash.com/photo-1511379938547-c1f69419868d?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            text-align: center;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            color: var(--accent-color);
            font-size: 2.5rem;
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            margin: 15px auto;
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            background: white;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-img-top {
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: bold;
            transition: background-color 0.3s ease;
        }
        .btn-primary:hover {
            background-color: var(--accent-color);
        }
        .footer {
            background-color: var(--accent-color);
            color: white;
            padding: 50px 0 20px;
        }
        .footer a {
            color: var(--light-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: var(--secondary-color);
        }
        .friendlink {
            background-color: #f1f8ff;
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: white;
            border-radius: 10px;
            color: var(--accent-color);
            text-decoration: none;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        .flink:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: scale(1.05);
        }
        .contact-info i {
            font-size: 1.5rem;
            margin-right: 10px;
            color: var(--primary-color);
        }
        .hover-effect {
            transition: color 0.3s ease, transform 0.3s ease;
        }
        .hover-effect:hover {
            color: var(--secondary-color);
            transform: scale(1.05);
        }
        .content-rich {
            font-size: 1.1rem;
            text-align: justify;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .card {
                margin-bottom: 20px;
            }
        }