MediaWiki:Common.css

/* CSS placed here will be applied to all skins */
.mw-headline, .firstHeading, .mw-body h1, .mw-body h2 {
  font-family: Sans-Serif;
}

body.page-Main_Page.action-view h1.firstHeading, body.page-Main_Page.action-submit h1.firstHeading { display: none; }