@media screen and (min-width: 768px) {
  .sp-only {
    display: none;
  }
  .header__nav .header__item.p-event-none .header__item__nav::before {
    content: none;
  }
  .header__item__link a {
    display: block;
    text-align: center;
    width: 105px;
    height: 100%;
    line-height: 5.4em;
  }
  #case .mv .bg {
    background: url(../images/case/bg_mv-case.png) top center/cover no-repeat;
  }
  .case-detail-ttl01 {
    padding: 15px 30px;
    background: #349599;
    color: #fff;
    font-size: 28px;
    font-weight: bold;
  }
  .case-detail-box {
    padding: 30px 30px 50px;
    background: #fff;
  }
  .case-detail-main {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: reverse;
        -ms-flex-direction: row-reverse;
            flex-direction: row-reverse;
    margin-top: 50px;
  }
  .case-detail-aside {
    width: 368px;
  }
  .case-detail-ttl02 {
    margin-top: 30px;
    padding: 7px;
    border: 1px solid #349599;
    background: #f2f2f2;
    text-align: center;
    color: #349599;
    font-weight: bold;
    font-size: 20px;
  }
  .case-detail-ttl02:first-child {
    margin-top: 0;
  }
  .case-detail-img01 {
    margin-top: 10px;
  }
  .case-detail-archive {
    width: 700px;
  }
  .case-detail-ttl03 {
    margin-top: 50px;
    padding: 5px 15px;
    border-left: 5px solid #349599;
    color: #349599;
    font-weight: bold;
    font-size: 24px;
  }
  .case-detail-ttl03:first-child {
    margin-top: 0;
  }
  .case-detail-txt01 {
    margin-top: 20px;
    padding-bottom: 40px;
    border-bottom: 1px solid #555;
  }
  .case-detail-txt01:last-child {
    border-bottom: none;
  }
  .case-detail-ttl04 {
    margin-top: 20px;
    font-weight: bold;
    font-size: 20px;
  }
  .case-detail-low {
    margin-top: 80px;
  }
  .case-list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    gap: 24px;
  }
  .case-item {
    width: 384px;
    margin-top: 40px;
    letter-spacing: 0.06em;
  }
  .case-link {
    display: block;
    color: #555;
    background: #fff;
  }
  .case-txt01 {
    min-height: 80px;
    padding: 10px 15px;
    font-size: 18px;
    font-weight: bold;
  }
  .case-txt02 {
    padding: 10px 15px;
    font-size: 13px;
  }
  .case-detail-btn01 {
    position: relative;
    display: block;
    width: 384px;
    margin: 90px auto 30px;
    padding: 20px;
    border: 1px solid #349599;
    background: #fff;
    text-align: center;
    color: #349599;
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 0.06em;
  }
  .case-detail-btn01::after {
    content: "";
    display: block;
    position: absolute;
    top: 50%;
    -webkit-transform: translateY(-50%);
            transform: translateY(-50%);
    right: 20px;
    width: 10px;
    height: 13px;
    background: url(../images/case/arrow01.png) top center/contain no-repeat;
  }
}
@media screen and (max-width: 768px) {
  .pc-only {
    display: none;
  }
  #case .mv .bg {
    background: url(../images/case/bg_mv-case.png) no-repeat 50% 0;
  }
  .case-detail {
    background: #fff;
  }
  .case-detail-ttl01 {
    width: 100vw;
    margin-left: -1rem;
    padding: 0.3636363636rem 0.9090909091rem;
    background: #349599;
    color: #fff;
    font-size: 1.5909090909rem;
    font-weight: bold;
  }
  .case-detail-box {
    padding: 0.9090909091rem 0 3.6363636364rem;
    background: #fff;
  }
  .case-detail-lead {
    font-size: 1.2727272727rem;
  }
  .case-detail-aside {
    width: 26.8181818182rem;
    margin: 1.8181818182rem auto 0;
  }
  .case-detail-ttl02 {
    margin-top: 2.2727272727rem;
    padding: 0.4545454545rem;
    border: 1px solid #349599;
    background: #f2f2f2;
    text-align: center;
    color: #349599;
    font-weight: bold;
    font-size: 1.4545454545rem;
  }
  .case-detail-ttl02:first-child {
    margin-top: 0;
  }
  .case-detail-img01 {
    margin-top: 0.6818181818rem;
  }
  .case-detail-archive {
    margin: 3.1818181818rem auto 0;
  }
  .case-detail-ttl03 {
    margin-top: 3.1818181818rem;
    padding: 0.3636363636rem 0.6818181818rem;
    border-left: 0.2272727273rem solid #349599;
    color: #349599;
    font-weight: bold;
    font-size: 1.5454545455rem;
    line-height: 1.3;
  }
  .case-detail-ttl03:first-child {
    margin-top: 0;
  }
  .case-detail-txt01 {
    margin-top: 0.9090909091rem;
    padding-bottom: 2.2727272727rem;
    border-bottom: 1px solid #555;
    font-size: 1.1818181818rem;
  }
  .case-detail-txt01:last-child {
    border-bottom: none;
  }
  .case-detail-ttl04 {
    margin-top: 0.9090909091rem;
    font-weight: bold;
    font-size: 1.3636363636rem;
    line-height: 1.3;
  }
  .case-detail-low {
    margin-top: 4.5454545455rem;
  }
  .case-item {
    margin-top: 1.3636363636rem;
    letter-spacing: 0.06em;
  }
  .case-item:nth-child(n+4) {
    display: none;
  }
  .case-item-detail:nth-child(n+3) {
    display: none;
  }
  .case-link {
    display: block;
    color: #555;
    background: #fff;
  }
  .case-txt01 {
    min-height: 6.3636363636rem;
    padding: 0.9090909091rem;
    font-size: 1.4545454545rem;
    font-weight: bold;
  }
  .case-txt02 {
    padding: 0.9090909091rem 1.1363636364rem;
    font-size: 1.2727272727rem;
  }
  .case-detail-btn01 {
    position: relative;
    display: block;
    width: 26.8181818182rem;
    margin: 4.5454545455rem auto 0.9090909091rem;
    padding: 1.3636363636rem 0.9090909091rem;
    border: 1px solid #349599;
    background: #fff;
    text-align: center;
    color: #349599;
    font-weight: 600;
    font-size: 1.2727272727rem;
    letter-spacing: 0.06em;
  }
  .case-detail-btn01::after {
    content: "";
    display: block;
    position: absolute;
    top: 50%;
    -webkit-transform: translateY(-50%);
            transform: translateY(-50%);
    right: 1.3636363636rem;
    width: 0.7727272727rem;
    height: 1rem;
    background: url(../images/case/arrow01.png) top center/contain no-repeat;
  }
}