<!DOCTYPE html>
<style>
div {
  font-size: 20px;
  font-family: Ahem;
  color: green;
}
.inner {
  background-color: green;
  border-inline-start: 50px solid green;
  border-inline-end: 50px solid green;
  padding-inline-start: 50px;
  padding-inline-end: 50px;
}
</style>
<!-- pre/post continuation blocks should only retain start/end decorations -->
<div><span><span class=inner>XXXXX<div></div></span></span></div>
<div><span><span class=inner><div></div>XXXXX</span></span></div>