.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: 437px;
    background: #FFF;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;

    cursor: pointer;
}

.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;
}