@media (max-width: 980px) {
  .main-slider div.main-content {
    margin-top: 40px
  }
  .main-content h4 {
    font-size: 40px;
    margin-bottom: 10px;
  }
  .main-content h1 {
    font-size: 30px;
    margin-bottom: 10px;
  }
  .main-content p {
    font-size: 18px;
    margin-bottom: 8px;
    max-width: 450px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .main-content .btn {
    font-size: 18px;
    padding: 5px 10px;
  }
  .about-section, .job-section {
    padding: 72px 0;
  }
  .banner-content {
    margin-top: 60px;
  }
}
@media (max-width: 540px) {
  .main-slider div.main-content {
    margin-top: 10px
  }
  .main-content h4 {
    font-size: 30px;
    margin-bottom: 6px;
  }
  .main-content h1 {
    font-size: 22px;
    margin-bottom: 6px;
  }
  .main-content p {
    font-size: 13px;
    margin-bottom: 8px;
    max-width: 275px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .main-content .btn {
    font-size: 11px;
    padding: 5px 8px;
  }
  .about-section, .job-section {
    padding: 48px 0;
  }
}