不同浏览器对于相同元素的默认样式并不一致，而且不同内核的浏览器在某些控件（元素）的表现上也是各有差异，比如字体、缩进等等，这些问题都是由于浏览器的默认样式（CSS）在作怪，下面西部e网整理了一份浏览器默认css的样式表文件，包括了IE各版本、Firefox、Opera、Webkit等供大家参考：
IE8浏览器默认CSS样式表
[dir=rtl] dd {
margin: 0 40px 0 0;
}
[dir=rtl] menu {
padding: 0 30pt 0 0;
}
[dir=rtl] ol {
padding: 0 30pt 0 0;
}
[dir=rtl] ul {
padding: 0 30pt 0 0;
}
a {
color: #06C;
text-decoration: underline;
}
a:visited {
color: #80080;
}
address {
display: block;
font-style: italic;
}
b {
font-weight: bold;
}
bdo {
direction: rtl;
unicode-bidi: bidi-override;
}
blockquote {
display: block;
margin: 1em 40px;
}
body {
display: block;
margin: 8px;
zoom: 1;
}
button {
background-color: #F0F0F0;
border-width: 3px;
box-sizing: border-box;
font-family: sans-serif;
font-size: 10pt;
overflow: hidden;
padding: 1px 8px;
text-align: center;
zoom: 1;
}
caption {
display: table-caption;
text-align: center;
zoom: 1;
}
cite {
font-style: italic;
}
code {
font-family: monospace;
font-size: 10pt;
}
col {
box-sizing: border-box;
display: table-column;
}
colgroup {
box-sizing: border-box;
display: table-column-group;
}
dd {
display: block;
margin: 0 0 0 40px;
}
del {
text-decoration: line-through;
}
dfn {
font-style: italic;
}
div {
display: block;
}
dl {
display: block;
margin: 1em 0;
}
dt {
display: block;
}
em {
font-style: italic;
}
embed {
zoom: 1;
}
fieldset {
border-style: groove;
border-width: 2px;
display: block;
margin: 0 2px;
padding: 0 2px 3px;
zoom: 1;
}
form {
display: block;
}
h1 {
display: block;
font-size: 2em;
font-weight: bold;
margin: 0.67em 0;
page-break-after: avoid;
}
h2 {
display: block;
font-size: 1.5em;
font-weight: bold;
margin: 0.83em 0;
page-break-after: avoid;
}
h3 {
display: block;
font-size: 1.17em;
font-weight: bold;
margin: 1em 0;
page-break-after: avoid;
}
h4 {
display: block;
font-size: 1em;
font-weight: bold;
margin: 1.33em 0;
page-break-after: avoid;
}
h5 {
display: block;
font-size: 0.83em;
font-weight: bold;
margin: 1.67em 0;
page-break-after: avoid;
}
h6 {
display: block;
font-size: 0.67em;
font-weight: bold;
margin: 2.33em 0;
page-break-after: avoid;
}
head {
display: none;
}
hr {
border-style: inset;
border-width: 1px;
display: block;
margin-bottom: 0.5em;
margin-top: 0.5em;
overflow: hidden;
text-align: center;
zoom: 1;
}
html {
display: block;
zoom: 1;
}
i {
font-style: italic;
}
iframe {
background-color: #FFF;
height: 150px;
width: 300px;
zoom: 1;
}
img {
zoom: 1;
}
input {
background-color: #FFF;
border-width: 2px;
font-family: sans-serif;
font-size: 10pt;
overflow: hidden;
padding: 1px;
zoom: 1;
}
ins {
text-decoration: underline;
}
kbd {
font-family: monospace;
font-size: 10pt;
}
legend {
padding: 0 2px;
zoom: 1;
}
li {
display: list-item;
}
menu {
display: block;
list-style-image: none;
list-style-position: outside;
list-style-type: disc;
margin: 1em 0;
padding: 0 0 0 30pt;
}
object {
zoom: 1;
}
ol {
display: block;
list-style-image: none;
list-style-position: outside;
list-style-type: decimal;
margin: 1em 0;
padding: 0 0 0 30pt;
}
optgroup {
font-family: sans-serif;
font-size: 10pt;
font-style: italic;
font-weight: bold;
}
option {
font-family: sans-serif;
font-size: 10pt;
font-style: italic;
font-weight: bold;
}
p {
display: block;
margin: 1em 0;
}
pre {
display: block;
font-family: monospace;
font-size: 10pt;
margin: 1em 0;
white-space: pre;
}
rp {
font-size: 6pt;
}
rt {
display: ruby-text;
font-size: 6pt;
}
ruby {
display: ruby;
}
samp {
font-family: monospace;
font-size: 10pt;
}
script {
display: none;
zoom: 1;
}
select {
background-color: #FFF;
border-width: 1px;
box-sizing: border-box;
font-family: sans-serif;
font-size: 10pt;
overflow: hidden;
zoom: 1;
}
small {
font-size: 0.83em;
}
strong {
font-weight: bold;
}
style {
display: none;
zoom: 1;
}
sub {
font-size: 0.83em;
}
sup {
font-size: 0.83em;
}
table {
border-color: #F0F0F0;
border-spacing: 2px 2px;
box-sizing: border-box;
display: table;
zoom: 1;
}
tbody {
box-sizing: border-box;
display: table-row-group;
vertical-align: middle;
}
td {
display: table-cell;
padding: 1px;
vertical-align: middle;
zoom: 1;
}
textarea {
background-color: #FFF;
border-width: 1px;
font-family: monospace;
font-size: 10pt;
overflow-x: hidden;
overflow-y: scroll;
padding: 2px;
white-space: pre-wrap;
zoom: 1;
}
tfoot {
box-sizing: border-box;
display: table-footer-group;
vertical-align: middle;
}
th {
display: table-cell;
font-weight: bold;
padding: 1px;
text-align: center;
vertical-align: middle;
zoom: 1;
}
thead {
box-sizing: border-box;
display: table-header-group;
vertical-align: middle;
}
tr {
box-sizing: border-box;
display: table-row;
vertical-align: middle;
zoom: 1;
}
ul {
display: block;
list-style-image: none;
list-style-position: outside;
list-style-type: disc;
margin: 1em 0;
padding: 0 0 0 30pt;
}
var {
font-style: italic;
}