5.清除默认样式_reset.css

body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,table,td,img,div,dl,dt,dd,input{

　　margin: 0;

　　padding: 0;

}

body{font-family: "Microsoft YaHei";font-size:12px;}

img{border:none;}

li{list-style:none;}

input,select,textarea{outline:none;}

a{text-decoration:none;}

/* 清除浮动 */

.clearfix:after{content:"";display:block;clear:both;}

.clearfix{zoom:1;}

原文地址：https://www.cnblogs.com/stone5/p/8998276.html