Screwed up layout

Running latest WP and theme at fleksjobbernetvaerket.dk At the 'frontpage' I allow ppl to click on a buttom in the promotion headline - itt says: Læs mere .. https://snag.gy/bq9Nhr.jpg Doing so, opens a new tab with a new page - and its all screwed up ... It should just be aplain page with text on https://snag.gy/8GxrcR.jpg thanks Knud