/* roulang page: index */
:root {
            --primary: #6366F1;
            --accent: #06B6D4;
            --bg-dark: #0A0D14;
            --text-main: #1E293B;
            --text-muted: #64748B;
        }
        html { scroll-behavior: smooth; }
        body { font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; background-color: #0A0D14; color: #F8FAFC; }
        .hero-glow {
            background: radial-gradient(circle at 50% 30%, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 80%);
        }
        .code-window {
            background: rgba(13, 17, 26, 0.95);
            border: 1px solid #1E293B;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
        }