balance: 回调过度难度——精力消耗4(持续时间翻倍)/恢复8，初始HC170，怪物HP/速度适度降低至合理区间

game/enemies/OldEmployee.ts

@@ -9,9 +9,9 @@ export class OldEmployee extends EnemyBase {
     speedMultiplier: number = 1.0,
     hpMultiplier: number = 1.0
   ) {
-    // HP: 150→240, speed: 50→65, kpiDamage: 8→12, hcReward: 30→22, shield: 3→4
-    super(scene, pathPoints, 240, 65, 12, 22, 'enemy-old', speedMultiplier, hpMultiplier)
-    this.shieldCount = 4
+    // HP: 180, speed: 55, kpiDamage: 10, hcReward: 25, shield: 3
+    super(scene, pathPoints, 180, 55, 10, 25, 'enemy-old', speedMultiplier, hpMultiplier)
+    this.shieldCount = 3
     this.imageSprite.setDisplaySize(this.cellW * 0.85, this.cellW * 0.85)
   }