/* roulang page: index */
:root {
            --brand-primary: #059669;
            --brand-teal: #14b8a6;
            --accent-amber: #f59e0b;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-dark);
            background-color: #ffffff;
            line-height: 1.6;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(6, 78, 59, 0.88) 0%, rgba(15, 23, 42, 0.82) 100%);
        }
        .deep-glow {
            background: radial-gradient(circle at 50% 30%, rgba(5, 150, 105, 0.22) 0%, rgba(15, 23, 42, 1) 75%);
        }
        details summary::-webkit-details-marker {
            display:none;
        }