.main {
  padding-top: 100px;
  padding-bottom: 100px;
  background-color: rgb(246,246,246);
  overflow: hidden;
}

.main_center {
  width: 1200px;
  margin: 0 auto;
}

.main_title {
  font-size: 30px;
  color: rgba(49,51,54,0.90);
  letter-spacing: 0;
  text-align: center;
  line-height: 40px;
  margin: 50px auto 90px;
}

.download-item {
  width: 500px;
  height: 286px;
  padding: 40px 40px 34px;
  float: left;
  background: #fff;
  margin-bottom: 40px;
}

.download-item:nth-child(2n+1) {
  margin-left: 40px;
}

.download-item .download-item_title {
  font-size: 18px;
  color: rgba(49,51,54,0.90);
  letter-spacing: 0;
  line-height: 22px;
  margin-bottom: 28px;
}

.download-item .download-item_message-strong {
  font-size: 12px;
  color: rgba(49,51,54,0.90);
  letter-spacing: 0;
  line-height: 22px;
  font-weight: 600;
  margin-bottom: 4px;
}

.download-item .download-item_message {
  font-size: 12px;
  color: rgba(49,51,54,0.90);
  letter-spacing: 0;
  line-height: 22px;
  margin-bottom: 36px;
}

.download-item .download-item_qrcode {
  width: 152px;
  display: block;
}

.download-item .download-item_btn {
  display: none;
}

@media (max-width: 991px) {
  .main {
    padding-top: 44px;
    padding-bottom: 40px;
  }

  .main_center {
    width: 100%;
  }

  .main_title {
    font-size: 22px;
    line-height: 20px;
    margin: 30px auto;
  }

  .download-item {
    width: 305px;
    height: 188px;
    padding: 30px 20px 32px;
    float: none;
    margin: 0 auto 20px !important;
  }

  .download-item .download-item_title {
    line-height: 20px;
    margin-bottom: 18px;
  }

  .download-item .download-item_message-strong {
    line-height: 20px;
    margin-bottom: 16px;
  }

  .download-item .download-item_message {
    margin-bottom: 30px;
  }

  .download-item .download-item_qrcode {
    display: none;
  }

  .download-item .download-item_btn {
    display: block;
    width: 305px;
    height: 55px;
    background: #0FAEA1;
    border-radius: 60px;
    margin: 0 auto;
    text-align: center;
    font-size: 19px;
    color: #fff;
    line-height: 55px;
  }
}