Вот пример для наглядности
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Pure CSS3 Ribbons Without Images</title>
<style type="text/css">
body
{
font-family: arial, helvetica, freesans, sans-serif;
font-size: 100%;
color: #333;
background-color: #ddd;
}
#page
{
width: 500px;
padding: 50px;
margin: 0 auto;
background-color: #fff;
border: 1px solid #333;
}
h1
{
font-size: 1.6em;
font-weight: normal;
margin: 0;
}
h2
{
position: relative;
width: 50%;
font-size: 1.5em;
font-weight: bold;
padding: 6px 20px 6px 71px;
margin: 30px 10px 10px -71px;
color: #555;
background-color: #999;
text-shadow: 0px 1px 2px #bbb;
-webkit-box-shadow: 0px 2px 4px #888;
-moz-box-shadow: 0px 2px 4px #888;
box-shadow: 0px 2px 4px #888;
}
h2:before, h2:after
{
content: ' ';
position: absolute;
width: 0;
height: 0;
}
h2:before
{
width: 30px;
left: -30px;
top: 12px;
border-width: 20px 10px;
border-style: solid;
border-color: #999 #999 #999 transparent;
}
h2.simple:before
{
display: none;
}
h2.flag:before
{
width: 0px;
left: auto;
right: -2px;
top: 0px;
border-color: transparent #fff transparent transparent;
}
h2:after
{
left: 0px;
top: 100%;
border-width: 5px 10px;
border-style: solid;
border-color: #666 #666 transparent transparent;
}
</style>
</head>
<body>
<div id="page">
<h1>Pure CSS3 Ribbons Without Images</h1>
<p>No images or additional elements are used to create these ribbons.</p>
<h2 class="simple">Requirements</h2>
<p>You only require a single <h2> tag and a little CSS3 code.</p>
<h2 class="flag">More Information</h2>
<p>For more information, please please refer to:<br />
<h2>No Restrictions</h2>
<p>It can be used without any restrictions but please don't expect 24/7 support! A link back to <a href="http://www.sitepoint.com/">SitePoint.com</a> is appreciated.</p>
</div>
</body>
</html>
