<!DOCTYPE html>
<html class="reftest-paged">
<title>
  Reference
</title>
<style>
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    position: absolute;
    left: 0; right: 0;
    height: 100%;
  }
  div {
    border: solid orange 10px;
  }
  div + div {
    border: solid transparent 20px;
  }
  div > div {
    border: solid gray 10px;
    height: 300%;
  }
</style>
<div></div>
<div>
  <div></div>
</div>
