为什么要初始化css样式
1.浏览器差异
不同浏览器对有些标签的默认值是不同的，如果没对css初始化会出现浏览器之间的页面显示差异
2.提高编码质量
如果不初始化，整个页面做完会很糟糕，重复的css样式很多
最简单的初始化方法是：（不建议）
1 * {padding: 0; margin: 0;}
淘宝样式 样式初始化
1 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; } 2 body, button, input, select, textarea { font:12px/1.5tahoma, arial, 5b8b4f53; } 3 h1, h2, h3, h4, h5, h6{ font-size:100%; } 4 address, cite, dfn, em, var { font-style:normal; } 5 code, kbd, pre, samp { font-family:couriernew, courier, monospace; } 6 small{ font-size:12px; } 7 ul, ol { list-style:none; } 8 a { text-decoration:none; } 9 a:hover { text-decoration:underline; } 10 sup { vertical-align:text-top; } 11 sub{ vertical-align:text-bottom; } 12 legend { color:#000; } 13 fieldset, img { border:0; } 14 button, input, select, textarea { font-size:100%; } 15 table { border-collapse:collapse; border-spacing:0; }
腾讯QQ官网 样式初始化
1 body,ol,ul,h1,h2,h3,h4,h5,h6,p,th,td,dl,dd,form,fieldset,legend,input,textarea,select{margin:0;padding:0} 2 body{font:12px"宋体","Arial Narrow",HELVETICA;background:#fff;-webkit-text-size-adjust:100%;} 3 a{color:#2d374b;text-decoration:none} 4 a:hover{color:#cd0200;text-decoration:underline} 5 em{font-style:normal} 6 li{list-style:none} 7 img{border:0;vertical-align:middle} 8 table{border-collapse:collapse;border-spacing:0} 9 p{word-wrap:break-word}
新浪官网 样式初始化
1 body,ul,ol,li,p,h1,h2,h3,h4,h5,h6,form,fieldset,table,td,img,div{margin:0;padding:0;border:0;} 2 body{background:#fff;color:#333;font-size:12px; margin-top:5px;font-family:"SimSun","宋体","Arial Narrow";} 3 4 ul,ol{list-style-type:none;} 5 select,input,img,select{vertical-align:middle;} 6 7 a{text-decoration:none;} 8 a:link{color:#009;} 9 a:visited{color:#800080;} 10 a:hover,a:active,a:focus{color:#c00;text-decoration:underline;}
网易官网 样式初始化
1 html {overflow-y:scroll;} 2 body {margin:0; padding:29px00; font:12px"5B8B4F53",sans-serif;background:#ffffff;} 3 div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,blockquote,p{padding:0; margin:0;} 4 table,td,tr,th{font-size:12px;} 5 li{list-style-type:none;} 6 img{vertical-align:top;border:0;} 7 ol,ul {list-style:none;} 8 h1,h2,h3,h4,h5,h6{font-size:12px; font-weight:normal;} 9 address,cite,code,em,th {font-weight:normal; font-style:normal;}