<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
p.speech {
position: relative;
width: 200px;
height: 100px;
text-align: center;
line-height: 100px;
background: #fff;
border: 2px solid #666;
-moz-border-radius: 30px;
-webkit-border-radius: 30px;
border-radius: 30px;
-moz-box-shadow: 2px 2px 4px #888;
-webkit-box-shadow: 2px 2px 4px #888;
box-shadow: 2px 2px 4px #888;
}
p.speech:before {
content: " ";
width: 0;
height: 0;
position: absolute;
top: 100px;
left: 30px;
border: 25px solid #666;
border-color: #666 transparent transparent #666;
}
p.speech:after {
content: " ";
width: 0;
height: 0;
position: absolute;
top: 100px;
left: 38px;
border: 15px solid #fff;
border-color: #fff transparent transparent #fff;
}
</style>
</head>
<body>
<p class="speech">w3cschool.cn
</p>
</body>
</html>
【bubble】
