.cb-slideshow,
.cb-slideshow:after {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    z-index: 0;
}
.cb-slideshow:after {
    content: '';
    background: transparent url(../images/pattern.png) repeat top left;
}
.cb-slideshow li span {
    width: 100%;
    height: 100%;
    position: absolute;
    top: -5px;
    left: 0px;
    color: transparent;
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: none;
    z-index: 0;
	
}
.cb-slideshow li:nth-child(1) span { background-image: url(../images/preise/Thilo-Feuershow-1.jpg) 
}
   
@media screen and (max-width: 1140px) {    
.cb-slideshow li:nth-child(1) span { background-image: url(../images/preise_mobil/Thilo-Feuershow-1.jpg) }
}