@media only screen and (min-width: 1081px){
	html{
		font-size: 50px;
	}
}
@media (max-width:1080px) and (min-width:100px ) {
	html{
		font-size: 25px;
	}
}

body{
	margin:0 auto;
	width: 100%;
	max-width: 640px;
	background-color: #f4f4f4;
	font-family: arial,"微软雅黑",sans-serif;
}
ul,li,ol{
	list-style: none;
	margin: 0;
	padding: 0;
}
p,h1,h2,h3,h4,h5{
	margin: 0;
	font-weight: normal;
}
img{
	display: block;
}
.w640{
	width: 100%;
	max-width: 640px;
	overflow:hidden;
	margin: auto;
}
a{
	color: inherit;
	text-decoration: none;
}


header{
	position: fixed;
	top: 0;
	height: 1.76rem;/*88/50*/
	line-height: 1.76rem;
	background-color: #3598dc;
	color: white;
	text-align: center;
	font-size: 0.72rem;/*36/50*/
	z-index: 100;
}
header a{
	display: block;
	position: absolute;
	left: 0;
	top: 0;
	width: 1.76rem;
	height: 1.76rem;
	background: url(../img/back_btn.png) center no-repeat;
	background-size: auto 50%;
}


footer{
	background-color: white;
	border-top: 1px solid #ccc;
	height: 1.98rem;
	position: fixed;
	bottom: 0;
}
footer ul{
	float: left;
	width: 20%;
	text-align: center;
	font-size: 0.4rem;/*20/50*/
	color: #808080;
}
footer ul li:first-child{
	width: 1rem;
	height: 1rem;
	margin:0.2rem auto 0.15rem;/*10/50*/
}
footer ul li:first-child img{
	width: 100%;
}
footer ul .cur_menu{
	color:#3598dc;
}