13. list numbering

  - accepted / - tried

Suppose we have some lists, they could be simple as

<ol>
  <li>BFE.dev</li>
  <li>JavaScript</li>
  <li>CSS</li>
  <li>System Design</li>
</ol>

or nested.

<ol>
  <li>BFE.dev</li>
  <li>
    JavaScript
    <ol>
      <li>TypeScript</li>
      <li>Quiz</li>
      <li>
        Framework
        <ol>
          <li>React</li>
          <li>Vue.js</li>
        </ol>
      </li>
    </ol>
  </li>
  <li>CSS</li>
  <li>System Design</li>
</ol>

please number the list as below, with color #f44336 and one space between the number and content.

1.simple list

2.nested

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