/* roulang page: index */
:root {
            --color-primary: #0F172A;
            --color-emerald: #059669;
            --color-cyan: #06B6D4;
            --color-dark: #090D16;
            --color-bg-light: #F8FAFC;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #1E293B;
            background-color: #FFFFFF;
        }
        .hero-bg-poster {
            background-image: linear-gradient(180deg, rgba(9, 13, 22, 0.82) 0%, rgba(9, 13, 22, 0.95) 100%), url('/assets/images/ba27956311e1ff8e.png');
            background-size: cover;
            background-position: center;
        }
        .infra-bg {
            background-image: radial-gradient(circle at 20% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 60%), radial-gradient(circle at 80% 70%, rgba(5, 150, 105, 0.08) 0%, transparent 60%);
        }
        .custom-scrollbar::-webkit-scrollbar { height: 6px; }
        .custom-scrollbar::-webkit-scrollbar-track { background: #0F172A; }
        .custom-scrollbar::-webkit-scrollbar-thumb { background: #334155; border-radius: 3px; }
        .custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #059669; }