diff --git a/main.py b/main.py
index 82dcec2..51d1110 100644
--- a/main.py
+++ b/main.py
@@ -509,8 +509,8 @@ def evaluate_design(turbines, connections, substation, cable_specs=None, is_offs
             power = 0
         
         # 电缆选型
-        # 成本乘数：海缆材料+敷设成本通常是陆缆的4-6倍
-        cost_multiplier = 5.0 if is_offshore else 1.0
+        # 成本乘数：如果Excel中已包含敷设费用，则设为1.0
+        cost_multiplier = 1.0 if is_offshore else 1.0
         
         # 默认电缆规格库 (如果未提供)
         if cable_specs is None: