HTML页面放大镜效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>HTML5网页放大效果</title>
<style>
.a {
transition: All 0.4s ease-in-out;
-webkit-transition: All 0.4s ease-in-out;
-moz-transition: All 0.4s ease-in-out;
-o-transition: All 0.4s ease-in-out;
200px;
height: 200px;
background-color: #000000;
display: block;
margin: 100px auto;
color: #fff;
text-align: center;
line-height: 200px;
font-size: 20px;
font-weight: bold;
}

.a:hover {
transform: scale(1.2);
-webkit-transform: scale(1.2);
-moz-transform: scale(1.2);
-o-transform: scale(1.2);
-ms-transform: scale(1.2);
}
</style>
</head>

<body>
<a class="a">网页放大效果，基于HTML5</a>
</body>

</html>