1.两栏布局（左固定，右适应）

先写出初始样式和结构。

<div class="container"> <div class="left">Lorem ipsum dolor sit amet</div> <div class="right">Lorem ipsum dolor sit amet</div> </div> div { height: 200px; color: #fff; } css代码

• float+margin实现方式

.left { float: left; width: 300px; background-color: #5616; } .right { width: 100%; margin-left: 300px; background-color: #438; }

• flex

.container { display: flex;}.left { flex: 0 0 300px; background-color: #5616; } .right { flex: 1 1; background-color: #438; }

右固定，左适应同理。

2.三栏布局

• float + margin方式

<div class="container"> <div class="left">Lorem ipsum dolor sit amet</div> <div class="right">Lorem ipsum dolor sit amet</div> <div class="main">Lorem ipsum dolor sit amet</div> </div> div { height: 200px; color: #fff; } .main { width: 100%; margin-left: 300px; margin-right: 100px; background-color: #554; } .left { float: left; width: 300px; background-color: #5616; } .right { float: right; width: 100px; background-color: #438; }

• grid实现方式

.container { display: grid; grid-template-columns: 300px auto 100px; //列的宽度}.main { grid-row: 1; //第几行 background-color: #554; } .left { grid-row: 1; //第几行 background-color: #5616; } .right { grid-row: 1; //第几行 background-color: #438; } 

• 圣杯布局

.container { padding: 0 100px 0 300px; overflow： hidden;}.main { float: left; width: 100%; background-color: #554; } .left { position: relative; float: left; width: 300px; left: -300px; margin-left: -100%; background-color: #5616; } .right { position: relative; float: left; right: -100px; margin-left: -100px; width: 100px; background-color: #438; } 

• 双飞翼布局

<div class="container"> <div class="wrap"> <div class="main">Lorem ipsum dolor sit amet</div> </div> <div class="left">Lorem ipsum dolor sit amet</div> <div class="right">Lorem ipsum dolor sit amet</div> </div> div { height: 200px; color: #fff; } .wrap { float: left; width: 100%; } .main { margin: 0 100px 0 300px; overflow: hidden; background-color: #554; } .left { float: left; width: 300px; margin-left: -100%; background-color: #5616; } .right { float: left; width: 100px; margin-left: -100px; background-color: #438; } 

两种布局方式的不同之处在于如何处理中间主列的位置：

圣杯布局是利用父容器的左、右内边距+两个从列相对定位；双飞翼布局是把主列嵌套在一个新的父级块中利用主列的左、右外边距进行布局调整复制代码

3.垂直居中

• position + margin实现（1）

<div class="container"> <div class="content"></div> </div> .container { position: relative; width: 500px; height: 500px; background-color: #5465; } .content { position: absolute; left: 50%; top: 50%; width: 200px; height: 200px; margin-left: -100px; margin-top: -100px; background-color: #6465; } 

• position + margin实现（2）

.container { position: relative; width: 500px; height: 500px; background-color: #5465; } .content { position: absolute; left: 0; top: 0; bottom: 0; right: 0; width: 200px; height: 200px; margin: auto; background-color: #6465; } 

• position + transform实现

.container { position: relative; width: 500px; height: 500px; background-color: #5465; } .content { position: absolute; left: 50%; top: 50%; width: 200px; height: 200px; transform: translate(-50%, -50%); background-color: #6465; } 

• flex实现

.container { display: flex; align-items: center; justify-content: center; width: 500px; height: 500px; background-color: #5465; } .content { width: 200px; height: 200px; background-color: #6465; } 复制代码

• inline-block实现

.container { display: inline-block; width: 500px; height: 500px; text-align: center; background-color: #5465; } .content { display: inline-block; width: 200px; height: 200px; vertical-align: middle; background-color: #6465; } .container::after{ content: ‘‘; display: inline-block; width: 0; height: 100%; vertical-align: middle; }