/*弹出层样式*/
#popup { position: fixed; left: 0px; top: 0px; width: 100%; height: 100%; text-align: center; display: none;z-index:9999;cursor: zoom-out; }
    #popup .modal-dialog {
        width: 100%;
        position: absolute;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        margin: auto;
    }
        #popup .modal-dialog img {
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            bottom: 0;
            margin: auto;
            min-width: 768px;
            max-width: 1200px;
        }