CSS Filter背景透明提示

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<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>CSS的Filter背景透明提示</title> 
<style> 
*{ margin:0; padding:0;} 
body{ margin:0 auto; font-size:12px;} 
.model{margin:0 auto; width:30px;} 
.model a:hover{ text-decoration:none;} 
.model a img{ border:#fff 1px solid;} 
.model a:hover img{ border:#888 1px dotted;} 
.model a span{ padding:0; display:block; width:80px; height:50px; margin-top:-32px; overflow:hidden; line-height:14px; filter: Alpha(opacity=0); opacity:.0; cursor:pointer; text-align:center;} 
.model a:hover span{ color:#fff; background:#000; padding:0; display:block; width:84px; height:54px; margin:-36px 0 0 1px!important; margin:-36px 0 0 0px; overflow:hidden; line-height:16px; filter: Alpha(opacity=60); opacity:.6; text-align:left; text-align:center;} 
.model2{margin:0 auto; width:30px;} 
.model2 a:hover{ text-decoration:none;} 
.model2 a img{ border:#fff 1px solid;} 
.model2 a:hover img{ border:#888 1px dotted;} 
.model2 a span{ padding:0; display:block; width:180px; height:50px; margin-top:-32px; overflow:hidden; line-height:14px; filter: Alpha(opacity=0); opacity:.0; cursor:pointer; text-align:center;} 
.model2 a:hover span{ color:#fff; background:#000; padding:0; display:block; width:480px; height:16px; margin:-36px 0 0 1px!important; margin:-20px 0 0 0px; overflow:hidden; line-height:16px; filter: Alpha(opacity=60); opacity:.6; text-align:left; text-align:center;}

</style> 
</head> 
<body> 
<img src="http://img.gxlcms.com//Uploads-s/new/2019-09-17-201917/20091103230519197.jpg" border="0" /><span>我可爱吗？</span> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]