1 <!DOCTYPE html> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 5 <meta name="viewport" content="width=device-width, initial-scale=1"> 6 <title></title> 7 <link href="css/demo3.css" rel="stylesheet" /> 8 <link href="css/pure-min.css" rel="stylesheet" /> 9 <link href="css/grids-responsive-min.css" rel="stylesheet" /> 10 </head> 11 <body> 12 <div id="header">头部</div> 13 <div id="mainbody" class="pure-g"> 14 <div class=" pure-u-1 pure-u-sm-2-5 pure-u-md-1-5 " id="main-left"><p>左边</p></div> 15 <div class="pure-u-1 pure-u-sm-3-5 pure-u-md-3-5" id="main-center"><p>中间</p></div> 16 <div class="pure-u-1 pure-u-sm-1 pure-u-md-1-5" id="main-right"><p>右边</p></div> 17 </div> 18 </body> 19 </html>
1 *{ 2 padding:0px; 3 margin:0px; 4 } 5 #header{ 6 width:80%; 7 margin:0px auto; 8 padding:20px 0px; 9 border:solid 1px red; 10 } 11 #mainbody{ 12 width:80%; 13 margin:0px auto; 14 } 15 16 #mainbody p{ 17 background-color:#ccc; 18 margin:10px; 19 min-height:100px; 20 }