:root {
            --primary-color: #a855f7;
            --secondary-color: #f472b6;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
        }
        body {
            font-family: 'Microsoft YaHei', sans-serif;
            background-color: var(--light-color);
            color: var(--dark-color);
            line-height: 1.8;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 20px;
        }
        .section-title {
            color: var(--primary-color);
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
            margin-bottom: 30px;
            font-weight: 700;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 10px 25px;
            border-radius: 50px;
            transition: background-color 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
        }
        .friendlink a.flink {
            display: inline-block;
            margin: 5px 15px;
            padding: 8px 20px;
            background: var(--dark-color);
            color: white;
            border-radius: 20px;
            text-decoration: none;
            transition: background 0.3s;
        }
        .friendlink a.flink:hover {
            background: var(--primary-color);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0;
        }
        .social-icons a {
            color: white;
            font-size: 1.5rem;
            margin: 0 10px;
            transition: color 0.3s;
        }
        .social-icons a:hover {
            color: var(--secondary-color);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .card-img-top {
                height: 200px;
            }
        }
        .content-rich {
            text-align: justify;
            margin-bottom: 40px;
        }