三栏布局,中间自适应,左右固定实现方法
方法一:浮动 <div class="container"> <div class="content">hello</div> <div class="left"></div> <div class="right"></div> </div> <style> .left{ float:left; width: 200px; height: 300px; background: red; } .right{ float: right; width: 200px; height: 300px; background: green; } .content{ width: 100%; height: 300px; background: blue; } </style> 方法二:定位 .left{ width: 200px; height: 300px; background: red; position: absolute; left: 0; top: 0; } .right{ width: 200px; height: 300px; background: green; position: absolute; right: 0; top: 0; } .content{ width: 100%; height: 300px; background: blue; margin:0