.html{background-color:#ebeef5;overflow:hidden}.header{width:100%;height:48px;line-height:48px;background-color:#393939}.header img{position:absolute;margin-top:8px}.header .tab{width:288px;height:44px;line-height:44px;font-size:14px;color:#fff;margin:0 auto}.header .tab span{display:inline-block;text-align:center;width:96px;height:44px;line-height:48px;cursor:pointer}.header .tab .span_active{border-bottom:4px solid var(--theme-color)}