body,p,header,nav,section,h1,h2,h3,h4{ margin: 0; } ul{ margin: 0; padding: 0; list-style: none; } input{ margin: 0; padding: 0; } img{ border:none; vertical-align: middle; } a{ text-decoration: none; } body{ font-size: 14px; font-family: "微软雅黑"; } .clearfix:after{ content: ''; display: block; clear: both; } .center{ width: 1181px; margin: 0 auto; }