 <p><strong>Header</strong>: The top layout with default style, in which any element can be nested.</p>
  </li>
  <li>
    <p><strong>Nav</strong>: A simple sidebar with default style, in which any element can be nested.</p>
  </li>
  <li>
    <p><strong>Main</strong>: The content layout with default style, in which any element can be nested, such as a grid container.</p>
  </li>
  <li>
    <p><strong>Footer</strong>: The bottom layout with default style, in which any element can be nested.</p>
  </li>
</ul