.bg {

}


.bg_right {
  position: absolute ;
    width: 100% ;
    height: 100% ;
    transform: translateX(100%);
    top: 0px ;
    right: 0px ;
    background: #FFF ;
    display: none ;
}

.bg_right img {
    width: 100% ;
    height: 100% ;
    object-fit: cover ;
}

.mask {
    width: 21rem ;
    height: 21rem ;
    background: #000;
    filter: Alpha(opacity=50);
    opacity: 0.5;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

.bigshow {
    width: 40rem ;
    height: 100%;
    overflow: hidden;
    margin-left: 10px;
    display: none;
    border: 1px solid #E8E8E8;
}

.smallshow {
    width: 100%;
    height: 70px;
    position: relative
}

.smallshow img {
    width: 100%;
    border: 1px solid #e8e8e8;
    box-sizing: border-box;
    transition: all 0.5s
}

.smallshow>.middle_box {
    margin-left: 30px;
    margin-right: 30px;
    width: 370px;
    overflow: hidden;
    height: 70px;
}

.smallshow .middle {
    overflow: hidden;
    transition: all 0.5s;
    height: 70px;
}

.smallshow .middle>li {
    width: 64px;
    height: 64px;
    float: left;
    cursor: pointer;
    padding: 0 5px;
}

.smallshow>p {
    position: absolute;
    top: 50%;
    width: 22px;
    height: 32px;
    margin-top: -16px;
}

.smallshow>.prev {
    left: 0;
    background: url(img/hover-prev.png) no-repeat;
    transition: all 0.5s
}

.smallshow>.next {
    right: 0;
    background: url(img/hover-next.png) no-repeat;
    transition: all 0.5s
}

.smallshow>.prev.prevnone {
    left: 0;
    background: url(img/prev.png) no-repeat;
    cursor: not-allowed
}

.smallshow>.next.nextnone {
    right: 0;
    background: url(img/next.png) no-repeat;
    cursor: not-allowed
}