/* roulang page: index */
:root {
            --primary-color: #0D5C3A;
            --accent-color: #10B981;
            --warning-color: #F59E0B;
            --dark-color: #0F172A;
            --text-color: #334155;
            --light-bg: #F8FAFC;
            --white: #FFFFFF;
            --radius: 24px;
            --shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--text-color); background: var(--light-bg); line-height: 1.6; }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }
        
        /* Layout */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .section { padding: 80px 0; }
        
        /* Header */
        .header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid rgba(15,23,42,0.1); }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
        .logo { font-size: 20px; font-weight: 800; color: var(--primary-color); }
        .nav-links a { margin-left: 30px; font-weight: 500; font-size: 15px; transition: color 0.3s; }
        .btn-cta { background: linear-gradient(135deg, var(--primary-color), var(--accent-color)); color: white; padding: 12px 24px; border-radius: 999px; font-weight: 600; }

        /* Hero */
        .hero { background: var(--dark-color); color: white; padding: 100px 0; clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%); }
        .hero-title { font-size: 48px; line-height: 1.2; margin-bottom: 24px; }
        .hero-desc { font-size: 18px; color: #cbd5e1; max-width: 600px; margin-bottom: 40px; }
        .hero-btn { display: inline-block; background: var(--accent-color); color: #064e3b; padding: 16px 36px; border-radius: 12px; font-weight: bold; }

        /* Components */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .card { background: var(--white); padding: 40px; border-radius: var(--radius); box-shadow: var(--shadow); transition: transform 0.3s; border: 1px solid rgba(15,23,42,0.06); }
        .card:hover { transform: translateY(-4px); }
        .badge { display: inline-block; background: #e0f2fe; color: #0369a1; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; margin-bottom: 16px; }

        /* Footer */
        .footer { background: var(--dark-color); color: #94a3b8; padding: 60px 0; font-size: 14px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .copyright { text-align: center; border-top: 1px solid #1e293b; padding-top: 40px; margin-top: 40px; }