.page_center {
  margin-top: 100px;
}

.page_left {
  text-align: center;
}

.page_left img {
  width: 250px;
}

.sub_nav {
  margin: 20% auto;
}

.sub_nav h4 {
  font-size: 26px;
  font-family: PingFang SC;
  font-weight: 500;
  color: #131313;
  margin-bottom: 30px;
}

.sub_nav h4 img {
  width: 60px;
  margin-right: 15px;
}

.sub_nav h5 {
  font-size: 16px;
  font-family: PingFang SC;
  font-weight: bold;
  color: #131313;
}

.sub_nav h5 i {
  width: 12px;
  height: 12px;
  background: #FFB72F;
  border-radius: 50%;
  display: inline-block;
  margin-right: 10px;
}

.sub_nav p {
  margin-bottom: 30px;
  padding-left: 24px;
}

.qrcode {
  text-align: center;
  margin: 80px auto;
}

.qrcode img {
  width: 180px;
}

.qrcode p {
  font-size: 16px;
  font-family: PingFang SC;
  font-weight: 400;
  color: #131313;
  margin-top: 15px;
}

@media (max-width:768px) {
  .page_center {
    margin-top: 50px;
  }

  .sub_nav {
    margin: 10% 13%;
  }

  .sub_nav h4 {
    font-size: 22px;
  }

  .sub_nav h4 img {
    width: 50px;
  }

  .qrcode {
    margin: 20px auto;
  }

  .qrcode p {
    padding: 0 25px;
  }
}