方法一： float + margin
.left{
???????????float: left;
???????????width: 100px;
???????}
.right {
margin-left:100px;
???????}
???????/*清除浮动*/
???????.container1:after{
???????????content: "";
???????????height: 0;
???????????line-height: 0;
???????????display: block;
???????????visibility: hidden;
???????????clear: both;
???????}
方法二： 父容器设置 display：flex；Right部分设置 flex：1
body{
display:flex;
}
.right{
???????????flex-grow: 1;
}
CSS左侧固定右侧自适应
原文地址：https://www.cnblogs.com/wanDPS/p/10470334.html