:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #dc3545;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.8;
            color: #333;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            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);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: bold;
            color: var(--primary-color);
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px;
            background: var(--light-bg);
            border-radius: 50px;
            text-decoration: none;
            color: var(--dark-bg);
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        .friendlink {
            background: var(--light-bg);
            padding: 60px 0;
        }
        .live-badge {
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }
        footer {
            background: var(--dark-bg);
            color: white;
        }
        .social-icon {
            font-size: 1.5rem;
            margin: 0 10px;
            transition: color 0.3s ease;
        }
        .social-icon:hover {
            color: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2rem;
            }
            .stats-number {
                font-size: 2rem;
            }
        }