/* ===================== 基础：极客等宽排版 ===================== */
      :root {
        --bg: #0b0e0d;
        --panel: #111614;
        --line: #1d2622;
        --fg: #c8ffe4;
        --dim: #5d7a6d;
        --green: #39ff9e;
        --amber: #ffb454;
        --cyan: #57d7ff;
        --red: #ff5f6d;
        --violet: #b78bff;
        --mono:
          "JetBrains Mono", "Fira Code", "Cascadia Code", Consolas, Menlo,
          "Courier New", monospace;
      }
      * {
        box-sizing: border-box;
      }
      html,
      body {
        height: 100%;
      }
      body {
        margin: 0;
        background: var(--bg);
        color: var(--fg);
        font-family: var(--mono);
        font-size: 14px;
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 16px;
        background-image: radial-gradient(
          1200px 600px at 50% -10%,
          rgba(57, 255, 158, 0.07),
          transparent 60%
        );
      }
      ::selection {
        background: rgba(57, 255, 158, 0.28);
        color: #eafff5;
      }