body,html{
	width:100%;height: 100%;
}
body{
	font-family:"microsoft yahei";
	background: #f0f0f5;
	font-size: 62.5%;/*12/16=0.75rem*/
	/*基数37.5*/
}

div {
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
}

a{
	text-decoration: none;
	font-size: 100%;
}
a:hover{
	text-decoration: none;
	transition:all 0.5s ease 0s;
}
.fl{float: left;}
.fr{float: right;}
.clearfix{
	zoom:1;
}
.clearfix::after {
	visibility: hidden;
	display: block;
	font-size: 0;
	content: " ";
	clear: both;
	height: 0;
}
.viewport{ width:10rem; margin:0 auto; overflow-x:hidden;position: relative;}

