body {
            font-family: 'Microsoft YaHei', sans-serif;
            background-color: #f8f9fa;
            color: #333;
        }
        .navbar {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: #fff !important;
        }
        .nav-link {
            color: #fff !important;
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: #ffdd40 !important;
        }
        .hero-section {
            background: url('https://images.unsplash.com/photo-1511379938547-c1f69419868d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
            text-align: center;
            position: relative;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 30px;
            color: #2c3e50;
            border-left: 5px solid #6a11cb;
            padding-left: 15px;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
        }
        .btn-primary {
            background: linear-gradient(to right, #6a11cb, #2575fc);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: bold;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background: linear-gradient(to right, #2575fc, #6a11cb);
            transform: scale(1.05);
        }
        .friendlink {
            background-color: #f1f8ff;
            padding: 50px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: #fff;
            border-radius: 10px;
            color: #2575fc;
            text-decoration: none;
            border: 2px solid transparent;
            transition: all 0.3s;
            font-weight: 500;
        }
        .flink:hover {
            border-color: #6a11cb;
            color: #6a11cb;
            transform: translateY(-3px);
        }
        footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 40px 0 20px;
        }
        .social-icons a {
            color: #ecf0f1;
            font-size: 1.5rem;
            margin: 0 10px;
            transition: color 0.3s;
        }
        .social-icons a:hover {
            color: #6a11cb;
        }
        .content-text {
            line-height: 1.8;
            font-size: 1.1rem;
            text-align: justify;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 2rem;
            }
            .card-img-top {
                height: 200px;
            }
        }