main {
    margin-top: 50px;
}

@media (max-width: 768px) {
    main {
            margin-top: 0;
    }
    div.sp_index_ {
        margin-top: 0px;
    }
    #globalHeader .siteInfo .siteName a img{
        /* margin-bottom:5px; */
    }
}
@media (max-width: 640px) {
    main {
            margin-top: 34vw;
    }
}