.index-s4 .item .img-box{background-image: url(/2024images/index/img-6-1.jpg);}
.index-s4 .item+.item .img-box{background-image: url(/2024images/index/img-6-2.jpg);}
.index-s4 .item+.item+.item .img-box{background-image: url(/2024images/index/img-6-3.jpg);}
.index-s4 .item41 .img-box{background-image: url(/2024images/index/img-6-4.jpg);}
.index-s4 .item41+.item41 .img-box{background-image: url(/2024images/index/img-6-5.jpg);}
.index-s4 .item41+.item41+.item41 .img-box{background-image: url(/2024images/index/img-6-6.jpg);}