<!DOCTYPE html>
<title>CSS Containment: contain:style and &lt;ol&gt; ordinals (start attribute, ref)</title>
<ol>
  <li value="10">A</li>
  <li value="11">B</li>
  <div>
    <li value="1">X</li>
    <li value="2">Y</li>
  </div>
  <li value="12">C</li>
  <li value="13">D</li>
</ol>
