Font of Menu Content Wrapper

Hi I need a little help with a font style over the Food Menu block. I have all in Montserrat, only this title seems to be different. I changed it in the Theme Editor, however it didn't change on the Website. I tried to add CSS like: .ui-tabs-anchor .ui-tabs-tab .ui-state-acive { font-family: 'Montserrat', sans-serif !important; } however nothing helped. Can you help me? Thank you! Here is my URL: http://dampfnudeln.corinnaundkevin.ch/ Titles: "Diese Woche" & "Nächste Woche"