diff --git a/packages/config/base.py b/packages/config/base.py
index f83f675f8..c50bfb84e 100755
--- a/packages/config/base.py
+++ b/packages/config/base.py
@@ -91,7 +91,9 @@ class SharedSettings(BaseSettings):
     # ── 豆包大模型（火山引擎方舟） ────────────────────────────────────────
     doubao_api_key: str = ""
     doubao_model: str = "doubao-seed-2-1-pro-260915"  # 推理模型（Seed 2.1 Pro，深度思考+多模态；原 seed-1-6 已下线）
-    doubao_fast_model: str = "doubao-seed-2-1-lite-260915"  # 快速模型（Seed 2.1 Lite，高 RPM，编导/审核/VLM lite；原 1-5-pro-32k 已 Retiring）
+    doubao_fast_model: str = (
+        "doubao-seed-2-1-lite-260915"  # 快速模型（Seed 2.1 Lite，高 RPM，编导/审核/VLM lite；原 1-5-pro-32k 已 Retiring）
+    )
     doubao_base_url: str = "https://ark.cn-beijing.volces.com/api/v3"
     doubao_timeout: int = 30
     doubao_max_retries: int = 2