<style>
.outer{
width:1170px;
height: auto;
}
.left{
width:200px;
height: 50px;
background-color: pink;
float: left;
}
.right{
height: 300px;
background-color: cadetblue;
overflow: auto;
}
</style>
<div class="outer">
<div class="left">left</div>
<div class="right">right</div>
</div>
效果:
捕获.JPG
