/* roulang page: index */
:root {
            --primary-color: #ff5e3a;
            --secondary-color: #1a1a1a;
            --accent-color: #ffc107;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --border-radius: 12px;
            --shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text-color); line-height: 1.6; }
        
        /* Navigation */
        .site-header { background: #fff; border-bottom: 1px solid #eee; padding: 1rem 0; position: sticky; top: 0; z-index: 1000; }
        .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary-color); text-decoration: none; }
        .nav-link { color: #333; font-weight: 500; padding: 0.5rem 1rem; transition: 0.3s; }
        .nav-link:hover { color: var(--primary-color); }
        
        /* Hero Section */
        .hero-section { position: relative; background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('/assets/images/backpic/back-1.jpg') no-repeat center center/cover; color: #fff; padding: 100px 0; text-align: center; }
        .hero-title { font-size: 3.5rem; font-weight: 900; margin-bottom: 1.5rem; line-height: 1.2; }
        .btn-primary { background: var(--primary-color); color: #fff; padding: 1rem 2.5rem; border-radius: 50px; font-weight: bold; border: none; cursor: pointer; transition: 0.3s; }
        .btn-primary:hover { background: #e04a2a; transform: translateY(-2px); }

        /* General Layout */
        section { padding: 80px 0; }
        .bg-light { background-color: var(--light-bg); }
        h2 { font-weight: 800; margin-bottom: 3rem; text-align: center; position: relative; }
        .section-desc { text-align: center; color: #666; max-width: 600px; margin: 0 auto 3rem; }
        
        /* Card Styles */
        .card-custom { border: none; border-radius: var(--border-radius); box-shadow: var(--shadow); transition: 0.3s; background: #fff; overflow: hidden; }
        .card-custom:hover { transform: translateY(-10px); }
        .card-img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 1.5rem; }

        /* Countdown */
        .countdown-bar { background: #333; color: #fff; padding: 20px; border-radius: var(--border-radius); display: flex; justify-content: center; gap: 20px; margin-top: -50px; box-shadow: var(--shadow); }

        /* Footer */
        footer { background: #111; color: #aaa; padding: 60px 0; }
        .footer-link { color: #aaa; text-decoration: none; }
        .footer-link:hover { color: #fff; }

        @media (max-width: 768px) { .hero-title { font-size: 2.2rem; } }