.advan{position:relative;}
.advan:before{content:'';width:100vw;height:100%;display:block;background: #F6F6F6 url(https://css02.v15cdn.com/m420/images/appli_bg.webp) no-repeat center bottom;background-size: 100%;position:absolute;top:0;left:50%;transform:translateX(-50%);z-index:1;}
.advan>div{position:relative;z-index:2;}
.advan .advan-item .tit{word-break:break-word;}
.factoryswiper .swiper-wrapper{flex-wrap:nowrap}