.portada_ontechpro_1 {
  background-image: url('../images/portada-ontech-1.jpg');
  background-position: 50% 0;
  background-size: cover;
  height: 100vh;
}

.container_main1 {
  height: 10vh;
  display: none;
}

.container_logo_ontech {
  flex-flow: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  display: flex;
}

.img_logo_1 {
  width: 720px;
}

.text-block {
  color: #fff;
  letter-spacing: 10px;
  margin-top: 48px;
  font-size: 20px;
}

.link_mail_contact {
  color: #fff;
  letter-spacing: 5px;
  margin-top: 48px;
  font-size: 20px;
}

.link {
  color: #fff;
}

@media screen and (max-width: 767px) {
  .img_logo_1 {
    width: 500px;
  }

  .text-block {
    text-align: center;
    letter-spacing: 5px;
    font-size: 18px;
  }
}

@media screen and (max-width: 479px) {
  .img_logo_1 {
    width: 300px;
  }

  .text-block {
    letter-spacing: 2px;
    margin-top: 20px;
    font-size: 14px;
  }

  .link {
    letter-spacing: 3px;
    font-size: 15px;
  }
}