/* roulang page: index */
:root {
      --primary: #0EA5E9;
      --primary-dark: #0284C7;
      --secondary: #06B6D4;
      --accent: #10B981;
      --dark-bg: #0F172A;
      --slate-bg: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .font-mono-code {
      font-family: "JetBrains Mono", "Fira Code", monospace;
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 4px;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(14, 165, 233, 0.12) 0%, rgba(15, 23, 42, 0) 70%);
    }
    .pulse-dot {
      animation: pulseAnim 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }
    @keyframes pulseAnim {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.15); }
    }
    .card-hover {
      transition: all 0.25s ease-in-out;
    }
    .card-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 14px 30px -10px rgba(14, 165, 233, 0.18);
    }