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原效果用addClass 改为slideUp，纯学习
效果图：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="css.css" rel="external nofollow" >
<title>Document</title>
</head>
<body>
<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
a{color:#000;text-decoration: none;font-weight: 600}
body{font:12px/180% Arial, Helvetica, sans-serif, "新宋体";}
.sph{
width: 1300px;
margin: 0 auto;
padding: 100px 0;
}
.spbq{
width: 250px;
height: 250px;
float: left;
line-height: 2;
padding: 10px 10px 0 20px;
margin: 20px;
position: relative;
overflow: hidden;
}
.spbq h2{
color: #14191e;
font: bold 14px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微软雅黑",Tahoma,Arial,sans-serif;
margin-top: 18px;
}
.spbq span{
display: block;
color: #b4bbbf;
font: 12px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微软雅黑",Tahoma,Arial,sans-serif;
margin: 8px 0;
}
.spbq b{
color: #787d82;
font: 12px/18px "Microsoft Yahei","Hiragino Sans GB",Helvetica,"微软雅黑",Tahoma,Arial,sans-serif;
}
.biankuang{
width: 3px;
height: 3px;
position: absolute;
z-index: 99;
border-radius:10px;
/*background: black;*/
}
.biankuang_1{
height: 3px;
top: -6px;
left:0px;
border-left: 3px solid #EB5858;
}
.biankuang_2 {
width: 0px;
bottom:-3px;
left: 0px;
border-top: 3px solid #EB5858;
}
.biankuang_3{
height: 0px;
bottom:0px;
right:0px;
border-right: 3px solid #EB5858;
}
.biankuang_4{
width:0px;
top:-3px;
right:0px;
border-bottom: 3px solid #EB5858;
}
.text_gobuy {
position: absolute;
z-index: 9;
bottom: 0;
left: 0px;
width: 280px;
height: 50px;
overflow: hidden;
background-color: rgba(32, 32, 33,0.5);
cursor: pointer;
display: none;
text-align: center;
}
.text_gobuy_show{
padding: 20px 15px ;
opacity: 1;
}
.spbq p{
position: absolute;
bottom:10px;
left:110px;
line-height: 33px;
color: #fff
}
</style>
</head>
<body>
<div class="sph">
<div class="spbq">
<div class="biankuang biankuang_1"></div>
<div class="biankuang biankuang_2"></div>
<div class="biankuang biankuang_3"></div>
<div class="biankuang biankuang_4"></div>
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基础课程</h2><span>让jQuery带您进入网页动态交互世界，为...</span><b>更新完毕 15783人学习</b></a>
<div class="text_gobuy">
<br/>
<p>9小时17分钟 | 初级</p>
<br/>
</div>
</div>
<div class="spbq">
<div class="biankuang biankuang_1"></div>
<div class="biankuang biankuang_2"></div>
<div class="biankuang biankuang_3"></div>
<div class="biankuang biankuang_4"></div>
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基础课程</h2><span>让jQuery带您进入网页动态交互世界，为...</span><b>更新完毕 15783人学习</b></a>
<div class="text_gobuy">
<br/>
<p>9小时17分钟 | 初级</p>
<br/>
</div>
</div>
<div class="spbq">
<div class="biankuang biankuang_1"></div>
<div class="biankuang biankuang_2"></div>
<div class="biankuang biankuang_3"></div>
<div class="biankuang biankuang_4"></div>
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基础课程</h2><span>让jQuery带您进入网页动态交互世界，为...</span><b>更新完毕 15783人学习</b></a>
<div class="text_gobuy">
<br/>
<p>9小时17分钟 | 初级</p>
<br/>
</div>
</div>
<div class="spbq">
<div class="biankuang biankuang_1"></div>
<div class="biankuang biankuang_2"></div>
<div class="biankuang biankuang_3"></div>
<div class="biankuang biankuang_4"></div>
<a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><div class="zst"><img src="http://www.jq22.com/demo/jQuery-hover20161208/images/0-135.jpg" alt=""></div><h2>jQuery基础课程</h2><span>让jQuery带您进入网页动态交互世界，为...</span><b>更新完毕 15783人学习</b></a>
<div class="text_gobuy">
<br/>
<p>9小时17分钟 | 初级</p>
<br/>
</div>
</div>
</div>
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script type="text/javascript">
function biankuang(obj) {
$(obj).find('.biankuang_1').stop(true).animate({
height: '305px'
},
300)
$(obj).find('.biankuang_2').stop(true).delay('300').animate({
width: '305px'
},
300)
$(obj).find('.biankuang_3').stop(true).animate({
height: '305px'
},
300)
$(obj).find('.biankuang_4').stop(true).delay('300').animate({
width: '305px'
},
300)
}
function biankuang1(obj) {
$(obj).find('.biankuang_1').animate({
height: '0'
},
100)
$(obj).find('.biankuang_2').animate({
width: '0'
},
100)
$(obj).find('.biankuang_3').animate({
height: '0'
},
100)
$(obj).find('.biankuang_4').animate({
width: '0'
},
100)
}
$('.spbq').hover(function() {
var obj = $(this);
obj.find('.text_gobuy').slideDown(300);
biankuang(obj);
}, function() {
var obj = $(this);
obj.find('.text_gobuy').slideUp(300);
biankuang1(obj);
})
</script>
</body>
</html>
</div>
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持！
</div>