<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>两列</title>
<style>
.container{
height: 1000px;
width: 1000px;
/* display: inline-block; */
position: relative;
margin: 0 auto;
border: 1px solid #fcc;
/* text-align: center; */
}
.box1{
border: 1px solid red;
float:left;
width: 30%;
height: 100%;
}
.box2{
border: 1px solid blue;
float:left;
width: 60%;
height: 100%;
}
.clearfix{
clear: both;
}
.box3{
border: 1px solid green;
float:left;
width: 60%;
height: 300px;
border-radius: 10px;
}
</style>
</head>
<body>
<div class="container">
<div class="box1">
</div>
<div class="box2">
</div>
<div class="box3">
</div>
</div>
</body>
</html>
来源：https://www.cnblogs.com/dabaixiong/p/12187329.html