.tab_img {
    position: relative;
    margin: 50px auto 0;
    width: 1024px;
    height: 510px;
    overflow: hidden;
}
.tab_img .img {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    
}
.tab_img .img.z1 {
    z-index: 1;
}
.tab_img .img:first-child {
    z-index: 1;
}
.tab_img .img.check {   
    z-index: 2;
    -webkit-animation: rightToleft .5s linear forwards;
    animation: rightToleft .5s linear forwards;
}
@-webkit-keyframes rightToleft {
    0% {left: 0;}
    100% {left: -100%;}
}
@keyframes rightToleft {
    0% {left: 0;}
    100% {left: -100%;}
}
.series_box>div>img.check {
    box-shadow: 2px 1px 5px 1px #b1b1b1;
    -webkit-transform: scale(1.1);
    transform: scale(1.1);
}