<style>
article :last-of-type {
  background-color: orange;
}
</style>
<article>
  <div>This `div` is first.</div>
  <div>This <span>nested `span` is last</span>!</div>
  <div>This <em>nested `em` is first</em>, but this <em>nested `em` is last</em>!</div>
  <b>This `b` qualifies!</b>
  <div>This is the final `div`!</div>
</article>
