/* roulang page: index */
:root {
            --bg-dark: #0A0A0B;
            --accent-orange: #FF6B00;
            --accent-green: #00C853;
            --text-main: #FFFFFF;
            --text-muted: #A0A0A0;
            --card-bg: #161618;
            --border-color: #2D2D30;
            --radius: 12px;
            --spacing: 80px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background-color: var(--bg-dark); color: var(--text-main); line-height: 1.6; }
        
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* Header */
        header { background: rgba(10, 10, 11, 0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border-color); padding: 15px 0; }
        .nav-inner { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 24px; font-weight: 800; color: var(--text-main); text-decoration: none; }
        .nav-links a { color: var(--text-main); text-decoration: none; margin-left: 30px; font-size: 15px; transition: color 0.3s; }
        .nav-links a:hover { color: var(--accent-orange); }

        /* Sections */
        section { padding: var(--spacing) 0; }
        h2 { font-size: 36px; margin-bottom: 40px; text-align: center; }
        
        /* Hero */
        .hero { background: linear-gradient(rgba(10,10,11,0.8), rgba(10,10,11,0.8)), url('/assets/images/backpic/back-1.jpg') center/cover; padding: 120px 0; text-align: center; }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        .hero p { font-size: 18px; color: var(--text-muted); max-width: 700px; margin: 0 auto 40px; }
        .btn-group { display: flex; justify-content: center; gap: 20px; }
        .btn { padding: 16px 32px; border-radius: var(--radius); font-weight: 600; text-decoration: none; transition: 0.3s; border: none; cursor: pointer; }
        .btn-primary { background: var(--accent-orange); color: #fff; }
        .btn-primary:hover { background: #e65c00; transform: translateY(-2px); }
        .btn-outline { border: 1px solid var(--accent-orange); color: var(--accent-orange); }
        .btn-outline:hover { background: var(--accent-orange); color: #fff; }

        /* Grid Cards */
        .grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
        .card { background: var(--card-bg); padding: 30px; border-radius: var(--radius); border: 1px solid var(--border-color); transition: 0.3s; }
        .card:hover { border-color: var(--accent-orange); transform: translateY(-5px); box-shadow: 0 4px 20px rgba(0,0,0,0.3); }
        .card h3 { margin-bottom: 15px; }
        .card p { color: var(--text-muted); font-size: 14px; }

        /* Stats Bar */
        .stats-bar { display: flex; justify-content: space-around; background: #1a1a1c; padding: 40px; border-radius: var(--radius); margin-bottom: var(--spacing); }
        .stat-item { text-align: center; }
        .stat-num { font-size: 32px; font-weight: 700; color: var(--accent-green); display: block; }
        .stat-label { color: var(--text-muted); font-size: 14px; }

        /* Footer */
        footer { background: #050505; padding: 60px 0 30px; border-top: 1px solid var(--border-color); color: var(--text-muted); text-align: center; font-size: 14px; }
        .footer-links { margin-bottom: 20px; }
        .footer-links a { color: var(--text-muted); text-decoration: none; margin: 0 10px; }

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