.alert-big-picture{
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,.7);
    z-index: 99999;
    left: 0;
    top: 0;
    /*display: none;*/
}
.alert-big-picture .swiper-container{
    width: 70%;
    height: 70%;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-bottom: 10%;
    -webkit-transform: translate(-50%,-50%);
    -moz-transform: translate(-50%,-50%);
    -ms-transform: translate(-50%,-50%);
    -o-transform: translate(-50%,-50%);
    transform: translate(-50%,-50%);
}
.alert-big-picture .swiper-slide img{
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    max-width: 98%;
    max-height: 98%;
}
.alert-big-picture .swiper-slide{
    height: auto;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%);
}
.alert-big-picture .bottom-group{
    width: 70%;
    height: 10%;
    overflow-x: auto;
    overflow-y: hidden;
    position: absolute;
    left: 50%;
    bottom: 0;
    white-space: nowrap;
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    -o-transform: translateX(-50%);
    transform: translateX(-50%);
}
.alert-big-picture .bottom-group div{
    display: inline-block;
    height: 100%;
    border: 1px solid transparent;
    vertical-align: top;
    margin-right: 8px;
}
.alert-big-picture .bottom-group div.ac{
    border-color: red;
}
.alert-big-picture .bottom-group img{
    display: block;
    height: 100%;
}