#middle-top-slider .carousel-inner .picture{background:center center no-repeat;-webkit-background-size:auto 100%;background-size:auto 100%}#middle-top-slider .carousel-inner .item .picture-inner{visibility:hidden;display:block}@media (max-width:1240px){#middle-top-slider .carousel-inner .item .picture-inner{max-width:100%;height:auto}}