因為各大浏覽器存在兼容性問題，同一個CSS屬性在不同浏覽器下的表現不一定相同，有經驗的前端設計者都會自定義一個重置浏覽器默認樣式的CSS文件，在這個文件中定義一些針對不同浏覽器最終表現一致的代碼，大家最為熟悉的也許就是*{margin:0 0}了，其實這是最簡單照顧兼容性的代碼，一般情況下，僅有這個是不夠的，筆者收集了幾個前端設計網站使用的reset.css代碼，為您做參考，你可復制這些代碼保存為reset.CSS文件，在每個頁面中引入即可。
CSS重置浏覽器樣式代碼一：
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body,ul,li,p,h1,h2,h3,h4,h5,h6,img,br,hr,table,tr,td,dl,dt,dd,form {
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margin: 0;
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padding: 0;
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}
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body {
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font-family: Arial,"微軟雅黑";
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font-size: 12px;
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color: #434343;
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}
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.clear {
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clear: both;
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font-size: 0px;
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}
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ul,li {
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list-style: none;
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}
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img {
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border: none;
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}
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/*一般鏈接*/
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a {
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text-decoration: none;
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color: #555;
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}
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a: hover {
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color: #3366ff;
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}
CSS重置浏覽器代碼二：
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Html, body, div, span, applet, object, iframe,
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h1, h2, h3, h4, h5, h6, p, blockquote, pre,
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a, abbr, acronym, address, big, cite, code,
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del, dfn, em, font, img, ins, kbd, q, s, samp,
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small, strike, strong, sub, sup, tt, var,
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b, u, i, center,
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dl, dt, dd, ol, ul, li,
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fIEldset, form, label, legend,
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table, caption, tbody, tfoot, thead, tr, th, td { background: transparent; border: 0; margin: 0; padding: 0;vertical-align: baseline; font-size: 100%; font: inherit; -webkit-text-size-adjust: none; }
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body { line-height: 1; }
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table { border-collapse: collapse; border-spacing: 0; }
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object, :focus { outline: none; }
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article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section /* Html 5 */ { display:block; }
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blockquote, q { quotes: none; }
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blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }
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a img { border: none; }
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input,button,textarea,select,optgroup,option{ font-size: 100%; font: inherit; }
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.al { text-align: left; }
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.ar { text-align: right; }
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.ac { text-align: center; }
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.lc { margin: 0 auto; }
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.fl, .il .fl { float: left; }
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.fr, .il .fr { float: right; }
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.fc, .il .fc { float: none; clear: both; }
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.rel { position: relative; }
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.abs { position: absolute; }
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.il { list-style: none; }
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.il li { float: left; }
CSS重置浏覽器代碼三：來自Eric Meyer網站：
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Html, body, div, span, applet, object, iframe,
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h1, h2, h3, h4, h5, h6, p, blockquote, pre,
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a, abbr, acronym, address, big, cite, code,
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del, dfn, em, font, img, ins, kbd, q, s, samp,
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small, strike, strong, sub, sup, tt, var,
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dl, dt, dd, ol, ul, li,
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fIEldset, form, label, legend,
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table, caption, tbody, tfoot, thead, tr, th, td {
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margin: 0;
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padding: 0;
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border: 0;
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outline: 0;
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font-weight: inherit;
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font-style: inherit;
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font-size: 100%;
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font-family: inherit;
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vertical-align: baseline;
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}
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: focus {
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outline: 0;
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}
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body {
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line-height: 1;
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color: black;
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background: white;
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}
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ol, ul {
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list-style: none;
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}
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table {
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border-collapse: separate;
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border-spacing: 0;
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}
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caption, th, td {
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text-align: left;
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font-weight: normal;
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}
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blockquote: before, blockquote: after,
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q: before, q: after {
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content: "";
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}
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blockquote, q {
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quotes: "" "";
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}
如果你確定用不上代碼中對某一選擇器的定義，可以刪除掉。