/* roulang page: index */
:root {
      --primary: #0F2B48;
      --accent: #00A884;
      --blue: #1D63FF;
      --dark: #091522;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 640px) { .custom-container { padding-left: 1.5rem; padding-right: 1.5rem; } }
    @media (min-width: 1024px) { .custom-container { padding-left: 2rem; padding-right: 2rem; } }
    .interactive-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .interactive-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -4px rgba(15, 43, 72, 0.1);
    }
    .code-editor-box {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }