浮动练习（2三折叠）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
  <style>
.container{
  width: 100%;
  height: 800px;
  /*background-color: aqua;*/
    margin: 0 auto;
}
.d{
    width: 47%;
    height: 459px;
    /*background-color: rosybrown;*/
    border: 2px solid gainsboro;
    border-radius: 10px;
    float: left;
    margin: 23px 37px;
    margin-right: 10px;
    text-align: center;
}
.d img{
    width: 90%;
    margin: 22px 37px;
    margin-bottom: 0px;
}
.d span{
    display: block;
    font-size: 30px;
    padding-top: 20px;
}
.d:hover{
    border: 2px solid red;
}

  </style>
</head>
<body>
<div class="container">
    <div class="d">
        <img src="imgs/a.jpg">
          <span>三折叠</span>
    </div>
    <div class="d">  <img src="imgs/a.jpg">
        <span>三折叠</span> </div>
    <div class="d"> <img src="imgs/a.jpg">
        <span>三折叠</span>  </div>
    <div class="d">  <img src="imgs/a.jpg">
        <span>三折叠</span> </div>
</div>
####图片需要自己下载，改名为a.jpq
</body>
</html>