/* roulang page: index */
:root {
      --primary: #0066FF;
      --primary-cyan: #00D2B4;
      --accent: #00E599;
      --bg-main: #F8FAFC;
      --bg-dark: #0B1120;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-glow-bg {
      background: radial-gradient(circle at 70% 30%, rgba(0, 210, 180, 0.15) 0%, rgba(0, 102, 255, 0.08) 35%, rgba(248, 250, 252, 0) 70%);
    }
    .custom-gradient-text {
      background: linear-gradient(135deg, #0066FF 0%, #00D2B4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .card-hover {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -10px rgba(0, 102, 255, 0.15);
      border-color: rgba(0, 102, 255, 0.3);
    }