.page-title { 
  padding: 20px;
  border: none;
  background: url(https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Endangered_arctic_-_starving_polar_bear.jpg/640px-Endangered_arctic_-_starving_polar_bear.jpg);
  background-size: cover;
  height: 400px; 
}