/* roulang page: index */
:root {
      --primary: #0F2F44;
      --accent: #0066FF;
      --cyan: #00BFA5;
      --dark: #0A192F;
      --text: #1E293B;
      --muted: #64748B;
      --border: #E2E8F0;
      --bg-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text);
      background-color: #ffffff;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 4px;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(0, 102, 255, 0.12) 0%, rgba(15, 47, 68, 0) 70%);
    }
    .stage-card {
      box-shadow: 0 25px 50px -12px rgba(15, 47, 68, 0.25);
    }