.header{
width:100%;
background-color:lightblue;
}
.header .context{
width:600px;
height:60px;
background-color: lightseagreen;
margin:0 auto;
}
.header .context .nav{
margin: 0px;
padding:0px;
}
.header .context .nav .item{
margin: 0px;
padding:0px;
list-style: none;
position: relative;
}
.header .context .nav .item a{
float:left;
min-height: 30px;
min-width: 70px;
height: 30px;
width:70px;
line-height: 30px;
text-align:center;
margin:5px;
padding:5px;
text-decoration-line: none;
}
.contain{
min-height:390px;
width:600px;
margin:6px auto;
}
.contain .wp{
background-color:#ccc;
min-height: inherit;
width:inherit;
}
.contain .left{
background-color:#D2B48C;
width:150px;
min-height: 380px;
margin-left:-100%;
}
.contain .right{
width:150px;
background-color:#DC143C;
min-height: 380px;
margin-left:-150px;
}
.wp ,.left,.right{
float:left;
}
.contain .wp .context{
padding-left:160px;
}
.footer{
width:100%;
background-color:lightblue;
}
.footer .context{
width:600px;
height:60px;
background-color:lightseagreen;
margin:0 auto;
}
.footer .context p{
text-align:center;
line-height:60px;
}
.footer .context p a{
text-decoration-line:none;
}
点击 "运行实例" 按钮查看在线实例
体会:1主内容居中,margin:0 auto;
2.双飞翼注意事项,div块级元素的浮动,使用margin-left和margin-right进行变动,
3.中间部分使用双div嵌套,防止内边距变动对左右两边造成影响;内容居中使用padding-left和padding-right变动到合适位置,
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