body,h1,h2,h3,h4,h5,h6,dl,dt,dd,ul,ol,li,th,td,p,blockquote,pre,form,fieldset,legend,input,button,textarea,hr{margin:0;padding:0}body,button,input,select,textarea{ font:12px/1.5 "宋体",arial, verdana, sans-serif}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}li{list-style:none}fieldset,img{border:0}table{border-collapse:collapse;border-spacing:0}q:before,q:after{content:”}button,input,select,textarea{font-size:100%}legend{color:#000}small{font-size:12px}hr{border:none;height:1px}a{text-decoration:none}a:hover{text-decoration:underline}.cle:after{content:".";display:block;height:0;clear:both;visibility:hidden}.cle{ display:inline-block}.cle{ display:block}.clear {clear: both;}原文：http://www.cnblogs.com/eva1963/p/4627573.html