设置鼠标的悬停效果
!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
/* hover专门设置标悬停效果 */
span:hover{
color: aliceblue;
font-size: 20px;
}
</style>
</head>
<body>
<span>111</span>
</body>
</html