css代码之所以初始化，是因为能尽量减少 各浏览器之间的兼容性问题!

腾讯QQ官网 样式初始化

body,ol,ul,h1,h2,h3,h4,h5,h6,p,th,td,dl,dd,form,fieldset,legend,input,textarea,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}

新浪官网 样式初始化

body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,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,input,img,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;}

淘宝官网 样式初始化

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, button, input, select, textarea {font:12px/1.5tahoma,arial, \5b8b\4f53; }

h1, h2, h3, h4, h5, h6{font-size:100%; }

address, cite, dfn, em, var {font-style:normal; }

code, kbd,pre, 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, input, select, textarea {font-size:100%; }

table {border-collapse:collapse;border-spacing:0; }

网易官网 样式初始化

html {overflow-y:scroll;}

body {margin:0;padding:29px00;font:12px"\5B8B\4F53",sans-serif;background:#ffffff;}

div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,blockquote,p{padding:0;margin:0;}

table,td,tr,th{font-size:12px;}

li{list-style-type:none;}

img{vertical-align:top;border:0;}

ol,ul {list-style:none;}

h1,h2,h3,h4,h5,h6{font-size:12px;font-weight:normal;}

address,cite,code,em,th {font-weight:normal;font-style:normal;}