@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;

      &:nth-child(1) {
        padding-top: 80px !important;
      }

      &:nth-child(odd) {
        height: 690px;
        padding: 120px 0;
        .cover {
          width: 668px;
          height: 410px;
        }
      }
      &:nth-child(even) {
        height: 720px;
        padding: 162px 0;
        background: url(/img/case-bg.png) no-repeat center;
        background-size: auto 720px;
        .cover {
          width: 568px;
          height: 397px;
        }
      }
      .cover {
        background: pink;
      }
      .content {
        position: relative;
        background: skyblue;
        width: 490px;
        height: 410px;
        margin-top: 50px;

        img {
          display: block;
          width: 580px;
          height: 516px;
          position: absolute;
          left: 50%;
          top: 50%;
          -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
        }
      }

      .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;

      &:nth-child(1){
        margin-top: 0.8rem;
      }

      .content {
        position: relative;
        margin: 0 auto;
        width: 6.14rem;
        height: 3.77rem;
        float: unset !important;
        -webkit-transform: translateY(-28%);
        transform: translateY(-28%);

        img {
          display: block;
          width: 6.14rem;
          height: 3.77rem;
          position: absolute;
          left: 50%;
          top: 50%;
          -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
        }
      }

      .cover {
        float: unset !important;
        margin: 0 auto;
        width: 6.14rem;
        height: 3.77rem;

        img {
          display: block;
          width: 100%;
          height: 100%;
        }
      }
    }
  }

  .footer {
    margin-top: 0;
  }
}