/* 追加CSS */
.gnav ul {
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1em;
}
.gnav ul > *:first-child {
    margin-left: 0;
}
.gnav ul > *:last-child {
    margin-right: 0;
}

.gnav li {
    margin: 0 1em;
}

.notice a {
    text-decoration: underline;
    font-size: small;
}