<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title></title>
<style>
p{
margin: 0px;
}
.box{
float: left;
position: relative;
width: 1000px;
border: 1px solid red;
}
.box .left{
background: red;
position: absolute;
height: 100%;
width: 80px;
}
.box .right{
margin-left: 80px;
padding: 20px;
background: beige;
}
.box .sp{
position: relative;
top: 50%;
margin-top: -11px;
display: block;
text-align: center;
}
.box1{
display: table;
width: 1000px;
border: 1px solid red;
}
.box1 .left{
display: table-cell;
background: red;
width: 80px;
vertical-align: middle;
text-align: center;
}
.box1 .right{
display: table-cell;
padding: 20px;
background: beige;
}
.box2{
display: flex;
width: 1000px;
border: 1px solid red;
}
.box2 .left{
width: 80px;
background: red;
text-align: center;
}
.box2 .right{
flex: 1;
background: beige;
padding: 20px;
}
.box2 .sp{
position: relative;
top: 50%;
margin-top: -11px;
}
</style>
</head>
<body>
<!--1、position:absolute;height:100%-->
<div class="box">
<div class="left">
<span class="sp">左侧</span>
</div>
<div class="right">
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
</div>
</div>
<div style="clear: both;margin-bottom: 40px;"></div>
<!--2、display:teble-->
<div class="box1">
<div class="left">
<span class="sp">左侧</span>
</div>
<div class="right">
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
</div>
</div>
<div style="clear: both;margin-bottom: 40px;"></div>
<!--3、display:flex-->
<div class="box2">
<div class="left">
<span class="sp">左侧</span>
</div>
<div class="right">
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
<p>1111</p>
</div>
</div>
</body>