diff --git a/backend/app/services/website_sync.py b/backend/app/services/website_sync.py
index 7efd992..4452333 100644
--- a/backend/app/services/website_sync.py
+++ b/backend/app/services/website_sync.py
@@ -181,7 +181,7 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
                     w1 = Decimal("0.85")
                     w_others = Decimal("0.15") / Decimal(N - 1)
                     base = rates_sorted[0] * w1 + sum(rates_sorted[1:], Decimal("0")) * w_others
-                
+
                 if base > 0:
                     effective_percent = (target_rate / base - Decimal("1")) * Decimal("100")
                     auto_percent_str = fixed_decimal_string(effective_percent.quantize(Decimal("0.01"), rounding=ROUND_HALF_UP), 2)