/* roulang page: index */
:root {
            --primary-color: #0056b3;
            --secondary-color: #e1f0ff;
            --text-color: #333333;
            --text-light: #666666;
            --bg-color: #ffffff;
            --section-bg: #f8f9fa;
            --border-radius: 12px;
            --shadow: 0 4px 12px rgba(0,0,0,0.05);
            --container-width: 1200px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; line-height: 1.6; color: var(--text-color); background-color: var(--bg-color); }
        
        .container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
        
        /* Header */
        header { position: sticky; top: 0; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); z-index: 1000; border-bottom: 1px solid #eee; padding: 15px 0; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: bold; color: var(--primary-color); text-decoration: none; }
        .nav-links { display: flex; gap: 30px; list-style: none; }
        .nav-links a { text-decoration: none; color: var(--text-color); font-weight: 500; }
        .btn-cta { background: var(--primary-color); color: #fff; padding: 10px 24px; border-radius: 30px; text-decoration: none; }

        /* Sections */
        section { padding: 80px 0; }
        .bg-gray { background-color: var(--section-bg); }
        h2 { font-size: 36px; margin-bottom: 40px; text-align: center; color: var(--text-color); }
        
        /* Hero Bento */
        .hero { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; padding: 60px 0; }
        .hero-content h1 { font-size: 48px; line-height: 1.2; margin-bottom: 20px; color: #000; }
        .hero-features { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 30px; }
        .feature-box { background: var(--secondary-color); padding: 20px; border-radius: var(--border-radius); }
        
        /* Layout Components */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .card { background: #fff; padding: 30px; border-radius: var(--border-radius); box-shadow: var(--shadow); transition: transform 0.3s ease; }
        .card:hover { transform: translateY(-5px); }
        
        /* Responsive */
        @media (max-width: 768px) {
            .hero { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .nav-links { display: none; }
        }

        /* Footer */
        footer { padding: 40px 0; background: #333; color: #fff; text-align: center; }
        footer a { color: #ccc; }