.hiddenDiv {
    display: none;
}
.showDiv {
    display: block;
}
#wxandriodguideTips,#wxiosguideTips{
    position: fixed;
    z-index: 99;
}
.positionImgBg{
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
}
.positionImg{
    position: fixed;
    top: 20%;
    width: 80%;
    left: 50%;
    transform: translate(-50%);
    border-radius: 50px;
}
.positionImg img{
    width: 100%;
    border-radius: 30px;
}