/* roulang page: index */
:root {
      --primary: #00E676;
      --primary-hover: #00C853;
      --accent: #0D47A1;
      --bg-dark: #0A0E17;
      --bg-surface: #121824;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #F8FAFC;
      color: #334155;
      line-height: 1.7;
    }
    .custom-shadow {
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }
    .glow-green {
      box-shadow: 0 0 20px rgba(0, 230, 118, 0.25);
    }