diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/html_renderer/assets.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/html_renderer/assets.rs
index 15c99ce95..b4c433087 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/html_renderer/assets.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/html_renderer/assets.rs
@@ -5,7 +5,7 @@ pub(super) fn font_face_rule(
     family: &str,
 ) -> Result<String, String> {
     let path = asset_url(&font.path)?;
-    Ok(format!("@font-face{{font-family:'{family}';src:url('{path}') format('{}');font-style:{};font-weight:{};}}", font.metadata.format.extension(), if font.metadata.italic { "italic" } else { "normal" }, font.metadata.weight))
+    Ok(format!("@font-face{{font-family:'{family}';src:url('{path}') format('{}');font-style:{};font-weight:{};}}", font.metadata.format.css_format(), if font.metadata.italic { "italic" } else { "normal" }, font.metadata.weight))
 }
 
 pub(super) fn html_comment(label: &str, value: serde_json::Value) -> Markup {
diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/resource/font.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/resource/font.rs
index 776f4b2e5..70efc4131 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/resource/font.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/resource/font.rs
@@ -30,6 +30,15 @@ impl FontFormat {
             Self::Woff2 => "woff2",
         }
     }
+
+    pub fn css_format(self) -> &'static str {
+        match self {
+            Self::TrueType => "truetype",
+            Self::OpenType => "opentype",
+            Self::Woff => "woff",
+            Self::Woff2 => "woff2",
+        }
+    }
 }
 
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize, TS)]
@@ -210,4 +219,12 @@ mod tests {
         .expect_err("reject unparseable web font")
         .contains("无法安全解析"));
     }
+
+    #[test]
+    fn font_format_uses_css_format_strings() {
+        assert_eq!(FontFormat::TrueType.css_format(), "truetype");
+        assert_eq!(FontFormat::OpenType.css_format(), "opentype");
+        assert_eq!(FontFormat::Woff.css_format(), "woff");
+        assert_eq!(FontFormat::Woff2.css_format(), "woff2");
+    }
 }