淘宝：
body,h1,h2,h3,h4,h5,h6,hr,p,blockquote,dl,dt,dd,ul,ol,li,pre,form,fieldset,legend,button,input,textarea,th,td { margin:0; padding:0; }
body,select,textarea { font:12px/1.5tahoma,arial,\5b8b\4f53; }
h1,h6{ font-size:100%; }
address,cite,dfn,em,var { font-style:normal; }
code,kbd,samp { font-family:couriernew,courier,monospace; }
small{ font-size:12px; }
ul,ol { list-style:none; }
a { text-decoration:none; }
a:hover { text-decoration:underline; }
sup { vertical-align:text-top; }
sub{ vertical-align:text-bottom; }
legend { color:#000; }
fieldset,img { border:0; }
button,textarea { font-size:100%; }
table { border-collapse:collapse; border-spacing:0; }
新浪：
body,table,td,img,div{margin:0;padding:0;border:0;}
body{background:#fff;color:#333;font-size:12px; margin-top:5px;font-family:"Simsun","宋体","Arial Narrow";}
ul,ol{list-style-type:none;}
select,select{vertical-align:middle;}
a{text-decoration:none;}
a:link{color:#009;}
a:visited{color:#800080;}
a:hover,a:active,a:focus{color:#c00;text-decoration:underline;}
腾讯
body,select{margin:0;padding:0}
body{font:12px"宋体","Arial Narrow",HELVETICA;background:#fff;-webkit-text-size-adjust:100%;}
a{color:#2d374b;text-decoration:none}
a:hover{color:#cd0200;text-decoration:underline}
em{font-style:normal}
li{list-style:none}
img{border:0;vertical-align:middle}
table{border-collapse:collapse;border-spacing:0}
p{word-wrap:break-word}
