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jQuery实现鼠标经过显示动画边框特效

原效果用addClass 改为slideUp,纯学习

效果图:

jQuery实现鼠标经过显示动画边框特效

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="/UploadFiles/2021-04-02/0-135.jpg">

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