fix(widgets): remove announcement outer card

assets/css/frontend/widget-batch5.css

@@ -2134,6 +2134,18 @@ a.main-color > .icon-cover-card:hover {
 }
 
 /* Announcement vertical swiper reuse notice styles */
+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,
+.widget.widget_aksrt_announcement {
+  /* The announcement bar owns its surface; avoid stacking the generic widget card around it. */
+  background: transparent;
+  border: 0;
+  box-shadow: none;
+  padding: 0;
+  overflow: visible;
+}
+
 .aksrt-announcement-swiper-wrap {
   display: flex;
   align-items: center;