diff --git a/apps/api/app/services/edit_plan_service.py b/apps/api/app/services/edit_plan_service.py
index 81a962b3b..6f2a4949d 100755
--- a/apps/api/app/services/edit_plan_service.py
+++ b/apps/api/app/services/edit_plan_service.py
@@ -913,12 +913,12 @@ class EditPlanService:
         plan_ids: list[str] = []
 
         # #1855 P0：先确定片段数 clip_count（用于节奏模板生成长度匹配）
-        from packages.domain.voice_duration_planner import RHYTHM_TEMPLATES, adapt_template_length
         from packages.domain.bgm_pool import allocate_bgm_pool_for_variants
         from packages.domain.variant_plan_selector import (
-            generate_visual_perturbation,
             generate_pixel_perturbation,
+            generate_visual_perturbation,
         )
+        from packages.domain.voice_duration_planner import RHYTHM_TEMPLATES, adapt_template_length
 
         clip_count = 0
         # 从源 plan 获取片段数（分页读，避免关系加载问题）
@@ -939,9 +939,7 @@ class EditPlanService:
         for _idx in range(count):
             if clip_count > 0:
                 variant_seed = rng.randint(0, 999999)
-                _tpl = adapt_template_length(
-                    RHYTHM_TEMPLATES[variant_seed % len(RHYTHM_TEMPLATES)], clip_count
-                )
+                _tpl = adapt_template_length(RHYTHM_TEMPLATES[variant_seed % len(RHYTHM_TEMPLATES)], clip_count)
                 rhythm_templates_for_variants.append(_tpl)
             else:
                 rhythm_templates_for_variants.append(None)