diff --git a/lib/models/dynamics/article_content_model.dart b/lib/models/dynamics/article_content_model.dart
index 69a5f4ff3..9911fe028 100644
--- a/lib/models/dynamics/article_content_model.dart
+++ b/lib/models/dynamics/article_content_model.dart
@@ -134,6 +134,13 @@ class Word {
           );
     fontLevel = json['font_level'];
   }
+
+  // font_level 映射处理：
+  //   "small"   → 13px
+  //   "regular" → 16px（与旧版 HTML 专栏基准一致）
+  //   其余/null → 同 regular
+  double get effectiveFontSize =>
+      fontSize ?? (fontLevel == 'small' ? 13.0 : 16.0);
 }
 
 class Style {
diff --git a/lib/pages/article/widgets/opus_content.dart b/lib/pages/article/widgets/opus_content.dart
index 3426070c6..bb322ee8e 100644
--- a/lib/pages/article/widgets/opus_content.dart
+++ b/lib/pages/article/widgets/opus_content.dart
@@ -151,7 +151,7 @@ class OpusContent extends StatelessWidget {
       style: _getStyle(
         word?.style,
         color ?? defaultColor,
-        word?.fontSize,
+        word?.effectiveFontSize,
       ),
     );
   }