#mainImg {
    background-image: url("../etc/img/bg_main.png?ts=2501");
}

#contents h3 {
    font-size: max(22pt, 2vw);
    font-weight: normal;
    margin-bottom: .5em;
}


#linkList dl > div {
    margin-bottom: 3em;
}

#linkList dl dt {
    text-align: center;
    font-size: min(8vw, 2em);
    margin-bottom: .5em;
}

#linkList dl dd ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(430px, 1fr));
    grid-gap: 1em;
}

#linkList dl dd ul a {
    display: block;
    background-color: #EFEFEF;
    padding: 1em;
}


@media screen and (max-width: 430px){
    #mainImg {
        background-image: url("../etc/img/bg_main_sp.png");
    }
    #linkList dl dd ul {
        grid-template-columns: 1fr;
    }
}