html,body{
    /* height: 100%; */
    -webkit-overflow-scrolling:touch;
}
body.hidden .gsWrapper{
    height: 100%;
    overflow:hidden;
}
.gsWrapper{
    display: none;
}
.mainWrapper{
    display: block;
}
header{
    padding:0 .3rem;
    width:7.5rem;
    box-sizing: border-box;
    height: .8rem;
    line-height: .8rem;
    text-align: center;
}
header .back,
header .menu{
    font-size: .28rem;
    color:#222;
}
header .menu{
    color:#2b7ae0;
}