diff --git a/src/Snap.Hutao/Snap.Hutao/View/Control/AnnouncementContentViewer.xaml.cs b/src/Snap.Hutao/Snap.Hutao/View/Control/AnnouncementContentViewer.xaml.cs
index e0ca9511..78955cf1 100644
--- a/src/Snap.Hutao/Snap.Hutao/View/Control/AnnouncementContentViewer.xaml.cs
+++ b/src/Snap.Hutao/Snap.Hutao/View/Control/AnnouncementContentViewer.xaml.cs
@@ -77,7 +77,7 @@ internal sealed partial class AnnouncementContentViewer : UserControl
         }
 
         content = StyleRegex().Replace(content, string.Empty);
-        content = RemRegex().Replace(content, "calc($1 * 10) rem");
+        content = RemRegex().Replace(content, "calc($0 * 10)");
 
         bool isDarkMode = ThemeHelper.IsDarkMode(theme);
 
@@ -127,7 +127,7 @@ internal sealed partial class AnnouncementContentViewer : UserControl
     [GeneratedRegex(" style=\"(?!\")*?vertical-align:middle;\"")]
     private static partial Regex StyleRegex();
 
-    [GeneratedRegex("([0-9]+\\.[0-9]+)rem")]
+    [GeneratedRegex("[0-9]+\\.[0-9]+rem")]
     private static partial Regex RemRegex();
 
     private void OnLoaded(object sender, RoutedEventArgs e)