diff --git a/apps/api/app/api/routes/scripts_ai.py b/apps/api/app/api/routes/scripts_ai.py
index d7ae0343b..c6588d9d1 100644
--- a/apps/api/app/api/routes/scripts_ai.py
+++ b/apps/api/app/api/routes/scripts_ai.py
@@ -95,7 +95,8 @@ if _cf:
 else:
     logger.warning(
         "抖音 cookies 文件未找到或无效: path=%s baked=%s 抖音提取功能可能因 cookies 缺失失败",
-        DOUYIN_COOKIES_FILE, DOUYIN_COOKIES_FILE_BAKED,
+        DOUYIN_COOKIES_FILE,
+        DOUYIN_COOKIES_FILE_BAKED,
     )
 
 # 是否在错误响应中暴露原始 yt-dlp 错误（仅 staging/dev 用于排查，生产默认 False）
@@ -194,7 +195,16 @@ def extract_from_douyin(
                 _dbg("errmsg", msg)
                 # 404/视频不存在/不可下载 → 400
                 is_bad_url = any(
-                    kw in msg.lower() for kw in ("404", "not found", "unable to download webpage", "unsupported url", "no video formats", "video unavailable", "this video isn't available")
+                    kw in msg.lower()
+                    for kw in (
+                        "404",
+                        "not found",
+                        "unable to download webpage",
+                        "unsupported url",
+                        "no video formats",
+                        "video unavailable",
+                        "this video isn't available",
+                    )
                 )
                 # cookies 缺失/过期 → 返回友好提示，不暴露 yt-dlp 原始错误
                 if _is_cookies_related_error(msg):
@@ -206,7 +216,9 @@ def extract_from_douyin(
                         status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
                         detail=_detail,
                     ) from exc
-                _detail = "无法解析该抖音链接，请确认链接有效且视频未被下架" if is_bad_url else "视频下载失败，请稍后重试"
+                _detail = (
+                    "无法解析该抖音链接，请确认链接有效且视频未被下架" if is_bad_url else "视频下载失败，请稍后重试"
+                )
                 if _DOUYIN_DEBUG_ERRORS:
                     _detail = f"{_detail} [debug: {msg[:300]}]"
                 raise HTTPException(