.page-mainv{background:url('../img/service/img-mainv2.png?1607352573');background-size:cover}.top-box .img-box{margin:60px 0;text-align:center}.top-box .img-box img{max-width:100%}@media only screen and (max-width: 680px){.top-box .img-box{margin:20px 0}}