diff --git a/apps/worker/video_processing/subtitle_render_engine.py b/apps/worker/video_processing/subtitle_render_engine.py
index a93474cb7..931b2240a 100755
--- a/apps/worker/video_processing/subtitle_render_engine.py
+++ b/apps/worker/video_processing/subtitle_render_engine.py
@@ -276,8 +276,8 @@ class SubtitleSegment:
     """单个字幕片段."""
 
     start: float  # 开始时间（秒）
-    end: float    # 结束时间（秒）
-    text: str     # 字幕文本
+    end: float  # 结束时间（秒）
+    text: str  # 字幕文本
     style_name: str = "Default"  # 使用的样式名
 
 
@@ -517,10 +517,7 @@ Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
         start_time = _format_ass_time(max(0, seg.start))
         end_time = _format_ass_time(max(seg.start + 0.1, seg.end))
 
-        return (
-            f"Dialogue: 0,{start_time},{end_time},{seg.style_name},,0,0,0,,"
-            f"{effect_tags}{safe_text}"
-        )
+        return f"Dialogue: 0,{start_time},{end_time},{seg.style_name},,0,0,0,," f"{effect_tags}{safe_text}"
 
     @property
     def has_subtitles(self) -> bool: