<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> .left, .middle, .right { position: relative; float: left; min-height: 400px; } .container { padding: 0 200px; overflow: hidden; } .left { width: 200px; left: -200px; margin-left: -100%; background: yellow; } .right { width: 200px; right: -200px; margin-left: -200px; background: purple; } .middle { width: 100%; background: orange; } </style> </head> <body> <div class="container"> <div class="middle"> 我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局我是圣杯布局 </div> <div class="left">左左</div> <div class="right">右右</div> </div> </body> </html>