/* roulang page: index */
:root {
      --primary: #0B0F19;
      --accent-green: #10B981;
      --accent-orange: #F97316;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --text-main: #1E293B;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: #0f172a;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #334155;
      border-radius: 3px;
    }
    .code-box {
      background: #090D16;
      border: 1px solid #1E293B;
      border-radius: 8px;
      font-family: 'JetBrains Mono', Consolas, monospace;
    }
    .hover-card {
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }
    .hover-card:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
      border-color: #cbd5e1;
    }