.common-productcate-bg{position:relative}
.common-productcate-bg::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:100vw;height:100%;background:#f9f9f9}
.common-productcate-bg>div{position:relative;z-index:2}
.common-productcate-bg.kche-t225 .kche-t225-box{background:transparent}