<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.main01 div{
float: left;
margin-top: 10px;
margin-left: 10px;
line-height: 190px;
text-align: center;
background-color: #DCDCDC;
color:red;
width: 185px;
height: 11.5625rem;
opacity: 0.5;
/* display:table-cell;
vertical-align: middle;
word-break: break-word;
text-align: center; */
}
.main01{
background-color: #000000;
width: 400px;
height: 400px;
margin: 0 auto;
/* border: 0px solid #000000; */
}
</style>
</head>
<body>
<div class="main01">
<div class="a">1</div>
<div class="a">2</div>
<div class="a">3</div>
<div class="a">4</div>
</div>
</body>
</html>
