Как обрезать background-image?
Через background-sizediv {
  height: 100vh;
  background-image: url('http://i.imgur.com/X1iIDmp.jpg');
  background-position: center;
  background-size: 2600px auto;
}
Через background-sizediv {
  height: 100vh;
  background-image: url('http://i.imgur.com/X1iIDmp.jpg');
  background-position: center;
  background-size: 2600px auto;
}