.third {
    position: relative;
    background: linear-gradient(135deg, #8d8cff 0%, #9664ec 100%);
    padding: 43px 20px 54px;
    h2 {
      width: 254px;
      font-size: 30px;
      font-family: PingFangSC-Semibold, PingFang SC;
      font-weight: 600;
      color: #ffffff;
      line-height: 40px;
      text-shadow: 0px 2px 4px #9366ee;
    }
    .preCore {
      .title {
        background: #fa912c;
      }
    }
  }
  .second {
    position: relative;
    background: linear-gradient(135deg, #ff9d9d 0%, #ff6d6d 100%);
    padding: 43px 20px 54px;
    h2 {
      width: 254px;
      font-size: 30px;
      font-family: PingFangSC-Semibold, PingFang SC;
      font-weight: 600;
      color: #ffffff;
      line-height: 40px;
      text-shadow: 0px 2px 4px #ff5f5f;
    }
    .preCore {
      .title {
        background: #fa502c;
      }
    }
  }
  .first {
    position: relative;
    background: linear-gradient(135deg, #4f8dff 0%, #0055ee 100%);
    padding: 43px 20px 54px;
    h2 {
      width: 254px;
      font-size: 30px;
      font-family: PingFangSC-Semibold, PingFang SC;
      font-weight: 600;
      color: #ffffff;
      line-height: 40px;
      text-shadow: 0px 2px 4px #1054f1;
    }
  }
  .icon {
    width: 231px;
    height: 223px;
    position: absolute;
    right: 3px;
    top: 8px;
  }
  
  .teacher {
    font-size: 16px!important;
    font-family: PingFangSC-Medium, PingFang SC!important;
    font-weight: 500!important;
    color: #ffffff!important;
    line-height: 20px!important;
    margin-top: 15px!important;
    margin-bottom: 67px!important;
  }
  .preCore {
    position: relative;
    z-index: 100;
    padding: 12px;
    background: #ffffff;
    border-radius: 11px;
    border-image: linear-gradient(
        180deg,
        rgba(255, 255, 255, 1),
        rgba(255, 255, 255, 1)
      )
      1 1;
    .start {
      width: 50px;
      height: 59px;
      position: absolute;
      top: 24px;
      right: -11px;
    }
    .title {
      width: 85px;
      background: #faab2c;
      border-radius: 7px;
      padding: 2px;
      font-size: 18px;
      font-family: PingFangSC-Semibold, PingFang SC;
      font-weight: 600;
      color: #ffffff;
      line-height: 25px;
      text-align: center;
    }
    .time {
      margin: 15px 0;
      font-size: 18px;
      font-family: PingFangSC-Medium, PingFang SC;
      font-weight: 600;
      color: #000000;
      line-height: 25px;
      margin-left: 4px;
    }
    .content {
      margin-top: 20px;
      position: relative;
      background: linear-gradient(49deg, #fff8e2 0%, #fff1d5 100%);
      border-radius: 8px;
      padding: 20px;
      font-size: 14px;
      font-family: PingFangSC-Regular, PingFang SC;
      font-weight: 400;
      color: #000000;
      line-height: 25px;
      margin-bottom: 12px;
      .pre {
        width: 20px;
        height: 20px;
        position: absolute;
        left: -3px;
        top: -4px;
      }
      .end {
        width: 20px;
        height: 20px;
        position: absolute;
        bottom: -4px;
        right: 10px;
      }
    }
  }
  .bottom {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin: 30px 8px 0;
    .logo {
      width: 202px;
      height: 84px;
    }
    .code {
      padding: 2px;
      width: 80px;
      height: 80px;
      background-color: #fff;
    }
  }