编写重置样式
不同的标签有着默认的样式，不同浏览器对标签的解析各不相同，重置css样式可以让标签在不同浏览器下产生相同的效果。
网上有许多现成的重置样式表，可以直接借鉴使用。例如：
html {
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%;
-webkit-tap-highlight-color: transparent;
height: 100%;
}
body {
margin:;
font-size: 14px;
font-family: "Helvetica Neue", Helvetica, STHeiTi, Arial, sans-serif;
line-height: 1.5;
color: #333;
background-color: #fff;
min-height: 100%;
}
article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section,summary {
display: block;
}
audio, canvas, progress, video {
display: inline-block;
}
audio:not([controls]) {
display: none;
height:;
}
progress {
vertical-align: baseline;
}
[hidden], template {
display: none;
}
a {
background: transparent;
text-decoration: none;
color: #08c;
}
a:active {
outline:;
}
abbr[title] {
border-bottom: 1px dotted;
}
b, strong {
font-weight: bold;
}
dfn {
font-style: italic;
}
mark {
background: #ff0; color: #000;
}
small {
font-size: 80%;
}
sub, sup {
font-size: 75%;
line-height:;
position: relative;
vertical-align: baseline;
}
sup {
top: -0.5em;
}
sub {
bottom: -0.25em;
}
img {
max-width: 100%;
border:;
vertical-align: middle;
}
svg:not(:root) {
overflow: hidden;
}
pre {
overflow: auto;
white-space: pre;
white-space: pre-wrap;
word-wrap: break-word;
}
code, kbd, pre, samp {
font-family: monospace, monospace;
font-size: 1em;
}
button, input, optgroup, select, textarea {
color: inherit;
font: inherit;
margin:;
vertical-align: middle;
}
button, input, select {
overflow: visible;
}
button, select {
text-transform: none;
}
button, html input[type="button"], input[type="reset"], input[type="submit"] {
-webkit-appearance: button;
cursor: pointer;
}
[disabled] {
cursor: default;
}
button::-moz-focus-inner, input::-moz-focus-inner {
border:;
padding:;
}
input {
line-height: normal;
}
input[type="checkbox"], input[type="radio"] {
box-sizing: border-box;
padding:;
}
input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button {
height: auto;
}
input[type="search"] {
-webkit-appearance: textfield;
box-sizing: border-box;
}
input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration {
-webkit-appearance: none;
}
fieldset {
border: 1px solid #c0c0c0;
margin: 0 2px;
padding: 0.35em 0.625em 0.75em;
}
legend {
border:;
padding:;
}
textarea {
overflow: auto;
resize: vertical;
vertical-align: top;
}
optgroup {
font-weight: bold;
}
input, select, textarea {
outline:;
}
textarea, input {
-webkit-user-modify: read-write-plaintext-only;
}
input::-ms-clear, input::-ms-reveal {
display: none;
}
input::-moz-placeholder, textarea::-moz-placeholder {
color: #999;
}
input:-ms-input-placeholder, textarea:-ms-input-placeholder {
color: #999;
}
input::-webkit-input-placeholder, textarea::-webkit-input-placeholder {
color: #999;
}
.placeholder {
color: #999;
}
table {
border-collapse: collapse;
border-spacing:;
}
td, th {
padding:;
}
h1, h2, h3, h4, h5, h6, p, figure, form, blockquote {
margin:;
}
ul, ol, li, dl, dd {
margin:;;
}
ul, ol {
list-style: none outside none;
}
h1, h2, h3 {
line-height:;
font-weight: normal;
}
h1 {
font-size: 18px;
}
h2 {
font-size: 16px;
}
h3 {
font-size: 14px;
}
i {
font-style: normal;
}
* {
box-sizing: border-box;
}
.clearfix::before, .clearfix::after {
content: "";
display: table;
}
.clearfix::after {
clear: both;
}
附：常见知名网站重制样式表：https://www.cnblogs.com/staven/p/4818459.html