/* roulang page: index */
:root {
            --primary: #00FF41;
            --bg-dark: #0A0A0A;
            --bg-card: #1A1A1A;
            --text-main: #FFFFFF;
            --text-sub: #A0A0A0;
            --border: #333333;
            --radius: 4px;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        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; }
        
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* Header */
        header { background: rgba(10, 10, 10, 0.95); border-bottom: 1px solid var(--border); padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 20px; font-weight: 800; color: var(--primary); }
        .nav-links { display: flex; gap: 20px; }
        .nav-links a { color: var(--text-sub); font-size: 14px; }
        .nav-links a:hover { color: var(--primary); }

        /* Hero */
        .hero { padding: 100px 0; background: linear-gradient(rgba(0,0,0,0.8), rgba(0,0,0,0.8)), url('/assets/images/backpic/back-1.png') center/cover; text-align: center; }
        .hero h1 { font-size: 48px; margin-bottom: 20px; }
        .hero p { font-size: 18px; color: var(--text-sub); max-width: 700px; margin: 0 auto 30px; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: #000; font-weight: bold; border-radius: var(--radius); }

        /* Sections */
        section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { font-size: 32px; margin-bottom: 10px; }

        .grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 20px; }
        .card { background: var(--bg-card); padding: 30px; border: 1px solid var(--border); border-radius: var(--radius); }
        .card h3 { color: var(--primary); margin-bottom: 15px; }

        /* Stats */
        .stats { display: flex; justify-content: space-around; background: #111; padding: 40px; border-top: 1px solid var(--border); }
        .stat-item { text-align: center; }
        .stat-val { font-size: 36px; font-weight: bold; display: block; color: var(--primary); font-family: monospace; }

        /* Footer */
        footer { background: #050505; padding: 40px 0; text-align: center; color: var(--text-sub); font-size: 12px; border-top: 1px solid var(--border); }