.u-section-1 {min-height: 639px; background-image: url("images/wordpresswartungsmodustutorial948x600.jpg"); background-position: 50% 9.19%} 

@media (max-width: 991px){ .u-section-1 {min-height: 515px} }

@media (max-width: 767px){ .u-section-1 {min-height: 401px} }

@media (max-width: 575px){ .u-section-1 {min-height: 276px} }.u-section-2 {background-image: none}
.u-section-2 .u-sheet-1 {min-height: 65px}
.u-section-2 .u-text-1 {font-weight: 700; margin: 20px 0}