body{
	height: 100vh;
}
html {

    font-size: 100px;
    background-color: #F2F2F2;
}

nav {
    height: 0.44rem;
    width: 100%;
    background-color: #5d7dff;
    position: relative;
}

nav i {
    display: inline-block;
    width: 0.16rem;
    height: 0.16rem;
    line-height: 0.44rem;
    background-image: url(../img/back.png);
    background-repeat: no-repeat;
    background-size: 100% auto;
    position: absolute;
    top: 0;
    bottom: 0;
    margin: auto;
	margin-left: 0.1rem;
}
nav span{
	position: absolute;
	left: 0;
	right: 0;
	margin: auto;
	font-size: 0.17rem;
	color: #FFFFFF;
	display: inline-block;
	width: 2rem;
	line-height: 0.44rem;
	text-align: center;
}
.iframe{
	width: 100%;
	height: 100%;
	-webkit-overflow-scrolling: touch;
	overflow-y: scroll;
}
.iframe iframe{
	-webkit-overflow-scrolling: touch;
}