レスポンシブ用のCSS

/* Large ≥992px */
@media screen and (max-width: 1199px) {
}

/* md ≥768px */
@media screen and (max-width: 992px) {
}

/* sm ≥576px */
@media screen and (max-width: 767px) {
}

/* xs <576px */
@media screen and (max-width: 576px) {
}