css高度已知，左右定宽，中间自适应三栏布局：
<!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> *{ margin: 0; padding: 0; } .box>div{ height: 100px; } .box .left{ background-color: red; width: 300px; float: left; } .box .right{ background-color: blue; width: 300px; float: right; } .box .center{ text-align: center; line-height: 100px; color: #fff; background-color: orange; } </style></head><body> <div > <div ></div> <div ></div> <div >第一种方法：浮动</div> </div></body></html>
原标题：css高度已知，左右定宽，中间自适应三栏布局
关键词：CSS
我知道了 