参考新浪微博
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no,viewport-fit=cover" />
<title></title>
<meta name="format-detection" content="telephone=no">
<!-- <script src="js/mui.min.js"></script>
<link href="css/mui.min.css" rel="stylesheet"/> -->
<style type="text/css">
body{
margin: 0;
padding: 0;
}
ul{
margin: 0 0 -0.25rem;
padding: 5px;
font-size: 0;
}
li{
list-style: none;
width: 33.33%;
padding: 0 .3125rem .3125rem 0;
display: inline-block;
box-sizing: border-box;
-webkit-box-sizing: border-box;
margin: 0;
}
li>div{
position: relative;
padding-bottom: 100%;
}
li>div>img{
object-fit: cover;
background-size: cover;
background-repeat: no-repeat;
background-position: 50%;
position: absolute;
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<ul>
<li class="imgbox">
<div class="">
<img src="https://wx2.sinaimg.cn/orj360/006WGDZaly1g4fl75x6t6j30dl0dcjuv.jpg">
</div>
</li>
<li class="imgbox">
<div class="">
<img src="https://wx2.sinaimg.cn/orj360/006WGDZaly1g4fl78bdzvj30d70jtjwf.jpg">
</div>
</li>
<li class="imgbox">
<div class="">
<img src="https://wx1.sinaimg.cn/orj360/006WGDZaly1g4fl7bh153j30j60ionhs.jpg">
</div>
</li>
<li class="imgbox">
<div class="">
<img src="https://wx1.sinaimg.cn/orj360/006WGDZaly1g4fl7cloz5j30j60j00zj.jpg">
</div>
</li>
</ul>
</body>
</html>
效果图: