*{margin:0;padding:0;box-sizing: border-box;outline:none;-webkit-tap-highlight-color: rgba(0,0,0,0);}
html,body{max-width: 640px;position: relative;font-size: 14px;margin:0 auto;-webkit-overflow-scrolling : touch;}
img{display:block;}
ul,li{list-style: none;}
a{text-decoration: none;color: #222;}
body{ position: relative;}
.pa{position: absolute;z-index: 10;}
.clear:after{content: '';display: block;clear:both;}
.fl{float: left;}
.fr{float: right;}
.hide{display: none;}

.list{
	top:58%;
	left:5%;
	width: 90%;
	height: 34%;
}
.list a{
	display: block;
	width: 50%;
	height: 50%;
	float: left;
	background:url(about:blank);
}

.back{
	position: fixed;
	background: #1291FF;
	color: #fff;
	opacity: 0.8;
	padding:2px 15px;
	border-radius: 0 30px 30px 0;
	top:10%;
	z-index: 100;
}