#home_slider .slk_sld:nth-child(1) { background-image: url(../../images/slider/cafe-hotel-restaurant-furniture.jpg); }
#home_slider .slk_sld:nth-child(2) { background-image: url(../../images/slider/bar-lounge-resort-rooftop-furniture.jpg); }
#home_slider .slk_sld:nth-child(3) { background-image: url(../../images/slider/office-furniture.jpg); }
#home_slider .slk_sld:nth-child(4) { background-image: url(../../images/slider/educational-furniture.jpg); }

@media screen and (max-width: 900px) {
    #home_slider .slk_sld:nth-child(1) { background-image: url(../../images/slider/cafe-hotel-restaurant-furniture-tab.jpg); }
    #home_slider .slk_sld:nth-child(2) { background-image: url(../../images/slider/bar-lounge-resort-rooftop-furniture-tab.jpg); }
    #home_slider .slk_sld:nth-child(3) { background-image: url(../../images/slider/office-furniture-tab.jpg); }
    #home_slider .slk_sld:nth-child(4) { background-image: url(../../images/slider/educational-furniture-tab.jpg); }
}

@media screen and (max-width: 600px) {
    #home_slider .slk_sld:nth-child(1) { background-image: url(../../images/slider/cafe-hotel-restaurant-furniture-mobile.jpg); }
    #home_slider .slk_sld:nth-child(2) { background-image: url(../../images/slider/bar-lounge-resort-rooftop-furniture-mobile.jpg); }
    #home_slider .slk_sld:nth-child(3) { background-image: url(../../images/slider/office-furniture-mobile.jpg); }
    #home_slider .slk_sld:nth-child(4) { background-image: url(../../images/slider/educational-furniture-mobile.jpg); }
}