/* roulang page: index */
:root {
            --brand-primary: #10b981;
            --brand-dark: #0f172a;
            --brand-surface: #f8fafc;
            --text-main: #090d16;
            --text-muted: #64748b;
        }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; color: #1e293b; background-color: #ffffff; }
        .hero-banner-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.88) 100%), url('/assets/images/8eec24c5d3307e4f.webp') center/cover no-repeat;
        }
        .matrix-pattern {
            background-image: radial-gradient(rgba(16, 185, 129, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }