fix(widgets): remove announcement outer card

assets/css/frontend/widget-batch5.css

@@ -2137,6 +2137,9 @@ a.main-color > .icon-cover-card:hover {
 body .content-layout__aside .widget.widget_aksrt_announcement,
 .theme-dark .content-layout__aside .widget.widget_aksrt_announcement,
 html.dark .content-layout__aside .widget.widget_aksrt_announcement,
+.theme-dark .zib-widget.widget_aksrt_announcement,
+html.dark .zib-widget.widget_aksrt_announcement,
+.zib-widget.widget_aksrt_announcement,
 .widget.widget_aksrt_announcement {
   /* The announcement bar owns its surface; avoid stacking the generic widget card around it. */
   background: transparent;