<hgroup> for header grouping
The hgroup element treats multiple header elements as a single item.
<!DOCTYPE HTML>
<html>
<head>
<title>Example</title>
<style>
hgroup > h1 { margin-bottom: 0px;}
hgroup > h2 {
background: grey;
color: white;
font-size: 1em;
margin-top: 0px;
}
</style>
</head>
<body>
<hgroup>
<h1>H1 in group</h1>
<h2>H2 in group</h2>
</hgroup>
<h1>H1 outside the group</h1>
<h2>H2 outside the group</h2>
<h3>H3 outside the group</h3>
</body>
</html>