<!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>Document</title>
<style>
#content {
overflow: hidden;
}
.left {
width: 200px;
/* 在小于3000的范围内都使用 */
margin-bottom: -3000px;
padding-bottom: 3000px;
background: blue;
float: left;
}
.right {
width: 400px;
margin-bottom: -3000px;
padding-bottom: 3000px;
background: red;
float: right;
}
.center {
margin: 0 410px 0 210px;
background: green;
height: 2000px;
}
</style>
</head>
<body>
<div id="content">
<div class="left">左边,无高度属性,自适应于最高一栏的高度</div>
<div class="right">右边,无高度属性,自适应于最高一栏的高度</div>
<div class="center">中间,高度600像素,左右两栏的高度与之自适应</div>
</div>
</body>
</html>