@media screen and (min-width: 768px) {
  .title {
    font-size: 34px;
    text-align: center;
    margin-top: 100px;
  }

  .main .case {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
  }
  .main .case:nth-child(1) {
    padding-top: 80px !important;
  }
  .main .case:nth-child(odd) {
    height: 690px;
    padding: 120px 0;
  }
  .main .case:nth-child(odd) .cover {
    width: 668px;
    height: 410px;
  }
  .main .case:nth-child(even) {
    height: 720px;
    padding: 162px 0;
    background: url(/img/case-bg.png) no-repeat center;
    background-size: auto 720px;
  }
  .main .case:nth-child(even) .cover {
    width: 568px;
    height: 397px;
  }
  .main .case .cover {
    background: pink;
  }
  .main .case .content {
    position: relative;
    background: skyblue;
    width: 490px;
    height: 410px;
    margin-top: 50px;
  }
  .main .case .content img {
    display: block;
    width: 580px;
    height: 516px;
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
  }
  .main .case .cover img {
    display: block;
    width: 100%;
    height: 100%;
  }

  .footer {
    margin-top: 0;
  }
}
@media screen and (max-width: 768px) {
  .title {
    font-size: 0.34rem;
    text-align: center;
    margin-top: 0.8rem;
  }

  .main .case {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
  }
  .main .case:nth-child(1) {
    margin-top: 0.8rem;
  }
  .main .case .content {
    position: relative;
    margin: 0 auto;
    width: 6.14rem;
    height: 3.77rem;
    float: unset !important;
    -webkit-transform: translateY(-28%);
    transform: translateY(-28%);
  }
  .main .case .content img {
    display: block;
    width: 6.14rem;
    height: 3.77rem;
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
  }
  .main .case .cover {
    float: unset !important;
    margin: 0 auto;
    width: 6.14rem;
    height: 3.77rem;
  }
  .main .case .cover img {
    display: block;
    width: 100%;
    height: 100%;
  }

  .footer {
    margin-top: 0;
  }
}