/* roulang page: index */
:root {
      --primary: #0d9488;
      --primary-light: #14b8a6;
      --primary-dark: #134e4a;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
      --bg-alt: #f0fdfa;
      --border-color: #e2e8f0;
      --radius-md: 1rem;
      --radius-lg: 1.5rem;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text-main);
      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: 9999px;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .hero-glow {
      background: radial-gradient(circle at 70% 30%, rgba(20, 184, 166, 0.15) 0%, rgba(11, 19, 43, 0) 70%);
    }