:root {
            --primary-color: #9c27b0;
            --secondary-color: #673ab7;
            --dark-color: #121212;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1511379938547-c1f69419868d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
            margin-bottom: 40px;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 30px;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 3px;
            background: var(--primary-color);
        }
        .card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .card-img-top {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .badge-custom {
            background-color: var(--primary-color);
            color: white;
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 20px;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        .friendlink a.flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #e9ecef;
            border-radius: 30px;
            color: #495057;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        .friendlink a.flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-color);
            color: #adb5bd;
            padding: 40px 0 20px;
        }
        .social-icons a {
            color: #adb5bd;
            font-size: 1.5rem;
            margin-right: 15px;
            transition: color 0.3s;
        }
        .social-icons a:hover {
            color: var(--primary-color);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: opacity 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }