#backGuide {
    display: none;
    position: fixed;
    width:100vw;
    height:100vh;
    top:0;
    left:0;
    background: rgba(0,0,0,0.8);
    z-index: 99999;
}

#backGuide .full {
    position: relative;
    width:100%;
    height:100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#backGuide .full a {
    display: block;
    max-width: 604px;
    width:80%;
}

#backGuide .full .backGuide-close {
    position: absolute;
    top:20px;
    right:20px;
    font-size:36px;
    color:#fff;
}