#dmm-olgnavi {
    border-bottom: 1px solid #ccc;
    background: #fff;
    font-size: 12px;
}
#dmm-olgnavi:after {
    display: block; 
    clear: both;
    content: "";
}
#dmm-olgnavi .dmmgames-top {
    display: block;
    float: left;
    margin: 2px 6px;
    padding: 4px 8px;
    line-height: 15px;
}
#dmm-olgnavi .dmmgames-top a {
    display: block;
    text-decoration: none;
}
#dmm-olgnavi .dmmgames-top img {
    border: none;
}
#dmm-olgnavi .dmm-visible-sp {
    display: none;
}
#dmm-olgnavi .dmm-visible-pc {
    display: block;
}

@media screen and (max-width: 960px) {
    #dmm-olgnavi .dmmgames-top img {
        width: auto;
        height: 28px;
    }
    #dmm-olgnavi .dmm-visible-sp {
        display: block;
    }
    #dmm-olgnavi .dmm-visible-pc {
        display: none;
    }
}