/* roulang page: index */
:root {
            --primary-color: #004A99;
            --accent-color: #FF7F00;
            --bg-light: #F8F9FA;
            --text-main: #333333;
            --text-muted: #666666;
            --border-color: #E9ECEF;
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.08);
            --radius-main: 6px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: var(--text-main); background-color: #ffffff; }
        
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* Header */
        header { padding: 15px 0; border-bottom: 1px solid var(--border-color); background: #fff; position: sticky; top: 0; z-index: 1000; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 22px; font-weight: bold; color: var(--primary-color); text-decoration: none; }
        .nav-links { display: flex; gap: 25px; }
        .nav-links a { text-decoration: none; color: var(--text-main); font-size: 15px; }
        .nav-links a:hover { color: var(--primary-color); }

        /* Hero */
        .hero { background: linear-gradient(rgba(0,74,153,0.9), rgba(0,74,153,0.9)), url('/assets/images/backpic/back-1.jpg') center/cover; padding: 100px 0; text-align: center; color: #fff; }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        .hero p { font-size: 18px; opacity: 0.9; margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .search-box { background: #fff; padding: 10px; border-radius: var(--radius-main); display: inline-flex; width: 100%; max-width: 500px; }
        .search-box input { flex: 1; border: none; padding: 10px; outline: none; }
        .search-box button { background: var(--accent-color); color: #fff; border: none; padding: 10px 25px; border-radius: var(--radius-main); cursor: pointer; }

        /* Sections */
        section { padding: 60px 0; }
        .section-title { text-align: center; font-size: 36px; margin-bottom: 40px; color: var(--primary-color); }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .card { padding: 30px; border: 1px solid var(--border-color); border-radius: var(--radius-main); box-shadow: var(--shadow-sm); transition: transform 0.3s; background: #fff; }
        .card:hover { transform: translateY(-5px); border-color: var(--primary-color); }

        /* Components */
        .btn-main { background: var(--accent-color); color: #fff; padding: 12px 30px; border-radius: var(--radius-main); text-decoration: none; display: inline-block; }
        .badge { background: #eef5ff; color: var(--primary-color); padding: 4px 10px; border-radius: 4px; font-size: 12px; }
        footer { background: #1C2A39; color: #ccc; padding: 40px 0; text-align: center; }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero h1 { font-size: 32px; }
        }