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/FreshGraduate.ts

@@ -9,8 +9,9 @@ export class FreshGraduate extends EnemyBase {
     speedMultiplier: number = 1.0,
     hpMultiplier: number = 1.0
   ) {
-    // HP: 30→50, speed: 120→145, kpiDamage: 2→3, hcReward: 10→8
-    super(scene, pathPoints, 50, 145, 3, 8, 'enemy-fresh', speedMultiplier, hpMultiplier)
+    // HP: 40, speed: 130, kpiDamage: 2.5→取整3不行，用整数2, hcReward: 9
+    // kpiDamage 用浮点：在 GameManager.reduceKPI 里用 Math.max(0, kpi - amount)
+    super(scene, pathPoints, 40, 130, 2, 9, 'enemy-fresh', speedMultiplier, hpMultiplier)
   }
   getQuote(): string { return getRandomQuote('FreshGraduate') }
 }