/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-dark: #0D3B36;
      --accent: #F59E0B;
      --bg-dark: #0B131E;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: #F8FAFC;
      color: var(--text-main);
      overflow-x: hidden;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(11, 19, 30, 0.94) 0%, rgba(13, 59, 54, 0.88) 100%);
    }
    .glass-nav {
      backdrop-filter: blur(12px);
      background-color: rgba(255, 255, 255, 0.92);
    }
    .metric-number {
      font-family: "Chakra Petch", "DIN Alternate", Inter, monospace;
    }