MediaWiki:Common.css

/* CSS placed here will be applied to all skins */ .mw-collapsible.custom-expand-button span.mw-collapsible-toggle::before { content: none; }

.mw-collapsible.custom-expand-button span.mw-collapsible-toggle::after { content: none; }

.mw-collapsible.custom-expand-button span.mw-collapsible-toggle .mw-collapsible-text { color: #ffffff; }