/* roulang page: index */
:root {
            --primary: #00F5A0;
            --secondary: #FF7B00;
            --bg-dark: #0A0D12;
            --bg-card: #12171F;
            --bg-panel: #19202B;
            --text-main: #FFFFFF;
            --text-body: #A0ABC0;
            --text-muted: #62728D;
            --border: rgba(255, 255, 255, 0.08);
            --radius: 8px;
            --shadow: 0 4px 20px rgba(0,0,0,0.4);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: system-ui, -apple-system, "PingFang SC", sans-serif; background-color: var(--bg-dark); color: var(--text-body); line-height: 1.6; }
        
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        a { text-decoration: none; color: inherit; transition: 0.25s ease-out; }
        button { cursor: pointer; transition: 0.25s ease-out; }

        /* Header */
        header { position: sticky; top: 0; z-index: 1000; background: rgba(10, 13, 18, 0.8); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
        .top-bar { font-size: 12px; padding: 8px 24px; display: flex; justify-content: space-between; border-bottom: 1px solid var(--border); color: var(--text-muted); }
        nav { height: 68px; display: flex; align-items: center; justify-content: space-between; }
        .logo { font-weight: 800; font-size: 20px; color: var(--text-main); }
        .nav-links { display: flex; gap: 32px; font-weight: 500; }
        .nav-links a:hover { color: var(--primary); }
        .btn-cta { padding: 10px 20px; border-radius: var(--radius); background: var(--primary); color: var(--bg-dark); font-weight: 600; }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 0 15px rgba(0, 245, 160, 0.3); }

        /* Sections */
        section { padding: 80px 0; }
        h2 { font-size: 32px; color: var(--text-main); margin-bottom: 40px; text-align: center; }
        h3 { font-size: 20px; color: var(--text-main); margin-bottom: 12px; }

        /* Hero */
        .hero { min-height: 600px; display: flex; align-items: center; background: linear-gradient(rgba(10,13,18,0.7), rgba(10,13,18,0.9)), url('/assets/images/5ddaaca0bf4844c9.png'); background-size: cover; background-position: center; }
        .hero-content { max-width: 700px; }
        .hero h1 { font-size: 48px; color: var(--text-main); line-height: 1.2; margin-bottom: 24px; }

        /* Grid Cards */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .card { background: var(--bg-card); border: 1px solid var(--border); padding: 32px; border-radius: var(--radius); transition: 0.25s ease; }
        .card:hover { transform: translateY(-4px); border-color: var(--primary); }

        /* Components */
        .data-bar { display: flex; justify-content: space-between; padding: 40px; background: var(--bg-panel); border-radius: var(--radius); margin: 40px 0; }
        .data-item { text-align: center; }
        .data-val { font-size: 36px; font-weight: 700; color: var(--primary); display: block; }
        
        .footer { padding: 60px 0; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 14px; text-align: center; }

        /* Mobile */
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .grid-3, .grid-2 { grid-template-columns: 1fr; }
            .hero h1 { font-size: 32px; }
        }