One
Two
Three
Three A
Three B
Three B i
One
Two
Three
Three A
Three B
Three B i
html { font-size: 16px; } .ems li { font-size: 1.3em; } .rems li { font-size: 1.3rem; }
<ul class="ems"> <li>One</li> <li>Two</li> <li>Three <ul> <li>Three A</li> <li>Three B <ul> <li>Three B 2</li> </ul> </li> </ul> </li> </ul> <ul class="rems"> <li>One</li> <li>Two</li> <li>Three <ul> <li>Three A</li> <li>Three B <ul> <li>Three B 2</li> </ul> </li> </ul> </li> </ul>