初始化浏览器样式——initCSS

@charset "utf-8";

*
{
	margin: 0;
	padding: 0;
	user-select: none;
	-ms-user-select: none;
	-moz-user-select: none;
	-webkit-user-select: none;
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
	-webkit-appearance: none;
	-webkit-backface-visibility: hidden;
	-webkit-tap-highlight-color: rgba(0,0,0,0);
}

h1, h2, h3, h4, h5, h6
{
	font-size: 16px;
	font-weight: normal;
	text-decoration: none;
}

hr
{
	height: 0;
	overflow: visible;
	-webkit-box-sizing: content-box;
	box-sizing: content-box;
}

a
{
	text-decoration: none;
	background-color: transparent;
}

a:focus, *:focus
{
	outline:none;
}

/* 未访问的链接 */
a:link, a:visited, a:hover, a:active
{
	color: #3a3c4c;
}

/* 缩写标签格式化 */
abbr[title]
{
	border-bottom: none;
	text-decoration: underline;
	-webkit-text-decoration: underline dotted;
	text-decoration: underline dotted;
}

b, strong，i, ins, del, s, big, small, em
{
	font-size: 16px;
	font-style: normal;
	text-decoration: none;
	font-weight: normal;
}

code, kbd, samp
{
	font-family: monospace, monospace;
}

sub, sup
{
	line-height: 0;
	font-size: 12px;
	position: relative;
	vertical-align: baseline;
}

sub
{
	bottom: -.25em;
}

sup
{
	top: -.5em;
}

img
{
	display: block;
	border-style: none;
}

button, input, optgroup, select, textarea
{
	font-family: inherit;
}

button, input
{
	outline: none;
	display: block;
	overflow: visible;
}

button, select
{
	text-transform: none;
}

button, [type='button'], [type='reset'], [type='submit']
{
	-webkit-appearance: button;
}

button::-moz-focus-inner, [type='button']::-moz-focus-inner, [type='reset']::-moz-focus-inner, [type='submit']::-moz-focus-inner
{
	border-style: none;
}

button:-moz-focusring, [type='button']:-moz-focusring, [type='reset']:-moz-focusring, [type='submit']:-moz-focusring
{
	outline: 1px dotted ButtonText;
}

/* 自定义placeholder样式 */
::-webkit-input-placeholder
{
	color: #3a3c4c;
}

:-moz-placeholder
{
	color: #3a3c4c;
}

::-moz-placeholder
{
	color: #3a3c4c;
}

:-ms-input-placeholder
{
	color: #3a3c4c;
}

textarea
{
	overflow: auto;
}

[type='number']::-webkit-inner-spin-button, [type='number']::-webkit-outer-spin-button
{
	height: auto;
}

[type='search']
{
	outline-offset: -2px;
	-webkit-appearance: textfield;
}

[type='search']::-webkit-search-decoration
{
	-webkit-appearance: none;
}

::-webkit-file-upload-button
{
	font: inherit;
	-webkit-appearance: button;
}

dl, dt, dd, ol, ul, li
{
	list-style: none;
}

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

th
{
	text-align: inherit;
}

/* 鼠标样式 */
.cp
{
	cursor: pointer;
}

.cm
{
	cursor: move;
}

/* 遮罩层 */
.mask
{
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	position: fixed;
	background: rgba(0, 0, 0, .6);
}

/* display */
summary
{
	display: list-item;
}

.hide, [hidden], template
{
	display: none;
}

.block, details, iframe
{
	display:block;
}

.inlineBlock, .fl, .fr
{
	display: inline-block;
}

/* 浮动 */
.fl
{
	float: left;
}

.fr
{
	float: right;
}

/* 文字定位 */
.al
{
	text-align: left;
}

.ac
{
	text-align: center;
}

.ar
{
	text-align: right;
}

/* 定位、居中 */
.fixed
{
	position: fixed;
}

.relative
{
	position: relative;
}

.absolute
{
	position: absolute;
}

.horMid
{
	left: 50%;
	transform: translateX(-50%);
	-ms-transform: translateX(-50%);
	-webkit-transform: translateX(-50%);
}

.verMid
{
	top: 50%;
	transform: translateY(-50%);
	-ms-transform: translateY(-50%);
	-webkit-transform: translateY(-50%);
}

.marginMiddle
{
	margin: 0 auto;
}

.imgMid
{
	vertical-align: middle;
}

/* 清除浮动 */
.clearfix
{
	*zoom: 1;
}

.clearfix::after
{
	clear: both;
}

.clearfix::before, .clearfix::after
{
	content: "";
	display: table;
}

/* 强制不换行 */
.nowrap
{
	white-space: nowrap;
	word-break: break-all;
}

附上GitHub链接：https://github.com/AeoRu5/initializeCSS