.songs-game{
        background: url(/hokuto-no-ken/img/information/footer_bg.png) center no-repeat;
        background-size: 101% 100%;
}
.button-common{
        font-size: 15px;
}
.songs-game-buttons li{
        width: 60%;
        max-width: 187px;
        margin: 0 0 0 auto;
}

@media only screen and (max-width: 1850px) {
        .songs-game{
                background-size: auto 100%;
        }
        .songs-game-buttons > li:not(:last-child) {
          margin-bottom: 0.18rem;
        }
        
}
@media only screen and (max-width: 750px) {
        .songs-game{
                background: url(/hokuto-no-ken/img/information/footer_bg.png) center no-repeat;
                background-size: auto 100%;
        }
        .songs-game-buttons > li:not(:last-child) {
          margin-bottom: 0.26rem;
        }
        .songs-game-buttons li{
                margin: 0 auto;
                width: 50%;
        }
}