Correction status:qualified
Teacher's comments:思路其实很重要
总结
双飞翼布局(三栏布局)
1.设置主体容器总宽度总高度;
2.使用容器wrap包住中间内容区,在容器wrap设置继承主体总容器高度(width:inherit)和宽度;
3.设置左边栏和右边栏的宽度高度;
4.将左中右三块内容区进行左浮动;
5.用margin-left将左右内容区移动到正确位置(左栏:margin-left:-100%;右栏:margin-left:减去自身的宽度)
6.将容器中的wrap里的main内容添加内边距,使main内容正确居中,形成挤压;
演示案例说明:
主体容器总宽度1000px;总高度400px;
wrap容器继承宽度width:1000px;最小高度400px;
左右边栏宽度250 最小高度400
三个内容区都进行左浮动,将左栏进行margin-left:-100%进行左移;将右 栏进行左移250px;修改容器wrap内的main的左右内边距,padding:0 250px;使中间内容正确居中显示
代码如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <!--<link rel="stylesheet" href="css/style3.css">--> <title>双飞翼布局</title> <style> /*头部内容区*/ .header { background-color: #e5ebe4 ; } .header .content { /*background-color: #888888;*/ width:1000px; height: 70px; margin: 0 auto; overflow: hidden; } .content .nav-logo { /*background-image: url("images/na-logo.jpg");*/ box-sizing: border-box; padding: 5px; float: left; } .content .nav-logo img { width:140px; height: 60px; display: block; } .content .nav { float: left; width:800px; } .content .nav .nav1 { margin-top: 0; margin-bottom: 0; padding-left: 10px; /*float: left;*/ overflow: hidden; } .content .nav .nav1 .item { list-style-type: none; } .content .nav .nav1 .item a{ float: left; line-height: 70px; padding: 0 20px; text-decoration: none; } .content .nav .nav1 .item a:hover{ background-color: #037b82; color: white; } /*主体*/ .container{ width:1000px; min-height: 400px; margin: 5px auto; background-color: lightblue; overflow:hidden; } .container .wrap{ width:inherit; min-height: 400px; background-color: coral; float: left; } .container .left { width:250px; min-height: 400px; background-color: lightcyan; float: left; margin-left: -100%; } .container .right { width:250px; min-height: 400px; background-color: lightslategrey; float: left; margin-left: -250px; } .container .wrap .main { padding-left: 250px; padding-right: 250px; } /*尾部内容区*/ .footer .content { border-top: 1px dotted #888888; width: 1000px; margin: 0 auto; overflow: hidden; } .footer .content .box1 { float: left; font-size: 0.8rem; } .footer .content .box2 { float: right; } .footer .content .box2 .nav-foot { margin-top: 0; margin-bottom: 0; padding-left: 0; overflow: hidden; } .footer .content .box2 .nav-foot .item { list-style-type: none; float: left; } .footer .content .box2 .nav-foot .item a { margin-top: 0; text-decoration: none; padding:0 5px; font-size: 0.8rem; color: #37a; } .footer .content .box2 .nav-foot .item a:hover{ background-color: #666699; color: white; } </style> </head> <body> <!--头部--> <div class="header"> <div class="content"> <div class="nav-logo"> <img src="images/na-logo.jpg" > </div> <div class="nav"> <ul class="nav1"> <li class="item"><a href="">精选</a></li> <li class="item"><a href="">文化</a></li> <li class="item"><a href="">行摄</a></li> <li class="item"><a href="">娱乐</a></li> <li class="item"><a href="">时尚</a></li> <li class="item"><a href="">生活</a></li> <li class="item"><a href="">科技</a></li> </ul> </div> </div> </div> <!--主体--> <div class="container"> <div class="wrap"> <div class="main">中间</div> </div> <div class="left">左侧</div> <div class="right">右侧</div> </div> <!--尾部--> <div class="footer"> <div class="content"> <div class="box1">© 2005-2019 douban.com, all rights reserved 北京豆网科技***</div> <div class="box2"> <ul class="nav-foot"> <li class="item"><a href="">关于豆瓣</a></li> <li class="item"><a href="">在豆瓣工作</a></li> <li class="item"><a href="">联系我们</a></li> </ul> </div> </div> </div> </body> </html>
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