.popup{
    width: 900px;
    margin: auto;
    text-align: center
}
.popup img{
    width: 200px;
    height: 200px;
    cursor: pointer
}
.show{
    z-index: 999;
    display: none;
}
.show .overlay{
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,.66);
    position: absolute;
    top: 0;
    left: 0;
}
.show .img-show{
    width: 600px;
    height: 400px;
    background: #FFF;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    overflow: hidden
}
.img-show span{
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 99;
    cursor: pointer;
}
.img-show img{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}
/*End style*/