#telecom,
#digitized,
#maintain,
#safety {
  padding-top: 10rem;
}

.telecom-list,
.digitized-list,
.maintain-list,
.safety-list {
  padding: 6rem 0;
}


/* 平板及以下（小屏幕） */
@media (max-width: 768px) {

  #telecom,
  #digitized,
  #maintain,
  #safety {
    padding-top: 5rem;
  }

  .telecom-list img,
  .digitized-list img,
  .maintain-list img {
    width: 100%;
  }

  .safety-list img {
    width: 58%;
  }
}