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<div class="deck"><section class="slide is-active" data-title="Two column">
  <p class="kicker">Pattern · 双栏</p>
  <h2 class="h2">概念 <span class="dim2">⟷</span> 示例</h2>
  <div class="grid g2 mt-l" style="align-items:start">
    <div class="card anim-fade-left" data-anim="fade-left">
      <h3>左栏 · 概念</h3>
      <p class="dim">一个主题 = 一组 CSS 变量。把颜色、字体、圆角、阴影全部收到 <code>:root</code> 里。</p>
      <ul class="mt-m">
        <li>— tokens 定义语义，不写具体色值</li>
        <li>— base.css 用 tokens 排版</li>
        <li>— 每个主题只改变量</li>
      </ul>
    </div>
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      <h3>右栏 · 示例</h3>
<pre class="mono" style="font-size:13px;background:var(--surface-2);padding:14px;border-radius:var(--radius-sm);overflow:auto">
:root {
  --bg: #fff;
  --text-1: #0c0d10;
  --accent: #3b6cff;
  --radius: 18px;
}
.card {
  background: var(--bg);
  color: var(--text-1);
  border-radius: var(--radius);
}</pre>
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