body{
	height: 100vh;
}
html {

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

nav {
    font-size: 0rem;
    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;
}
.iframe{
	width: 100%;
	height: calc(100% - 0.64rem);
	overflow-x:scroll
}