/* Для фона определенного блока */
#block-id #rec876037093{
  background-image: url('https://static.tildacdn.com/tild6132-3737-4766-a566-393334623162/1672365500_4-zefirka.jpg');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
}