.showImg {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 9999
        }

        .showImg .back {
            position: absolute;
            margin: 0;
            width: 100%;
            height: 100%;
            background-color: #000;
            opacity: .5
        }

        .showImg img {
            max-width: 90%;
            max-height: 100%;
            margin: auto;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0
        }

        .showImg .close {
            opacity: .7;
            cursor: pointer;
            font-size: 30px;
            width: 45px;
            height: 45px;
            line-height: 45px;
            text-align: center;
            background: #000;
            color: #fff;
            opacity: 1;
            border-radius: 100%;
            position: absolute;
            right: 30px;
            top: 30px
        }