diff --git a/src/App.vue b/src/App.vue
index 238823f..d1ea4e2 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1136,6 +1136,11 @@
 
         // 这是NPC的星球
         if (!npcMap.has(planet.ownerId)) {
+          // 为每个NPC设置随机的初始冷却时间，避免所有NPC同时行动
+          const now = Date.now()
+          const randomSpyOffset = Math.random() * 240 * 1000 // 0-4分钟的随机延迟
+          const randomAttackOffset = Math.random() * 480 * 1000 // 0-8分钟的随机延迟
+
           npcMap.set(planet.ownerId, {
             id: planet.ownerId,
             name: `NPC-${planet.ownerId.substring(0, 8)}`,
@@ -1145,8 +1150,8 @@
             relations: {}, // 外交关系
             allies: [], // 盟友列表
             enemies: [], // 敌人列表
-            lastSpyTime: 0, // 上次侦查时间
-            lastAttackTime: 0, // 上次攻击时间
+            lastSpyTime: now - randomSpyOffset, // 设置随机的上次侦查时间
+            lastAttackTime: now - randomAttackOffset, // 设置随机的上次攻击时间
             fleetMissions: [], // 舰队任务
             playerSpyReports: {} // 对玩家的侦查报告
           })
@@ -1224,7 +1229,8 @@
     }
 
     const now = Date.now()
-    const allPlanets = Object.values(universeStore.planets)
+    // 合并玩家星球和NPC星球到allPlanets（NPC需要能够侦查和攻击玩家星球）
+    const allPlanets = [...gameStore.player.planets, ...Object.values(universeStore.planets)]
 
     // 更新每个NPC的行为
     npcStore.npcs.forEach(npc => {
diff --git a/src/components/IncomingFleetAlerts.vue b/src/components/IncomingFleetAlerts.vue
index 6037781..1d6d514 100644
--- a/src/components/IncomingFleetAlerts.vue
+++ b/src/components/IncomingFleetAlerts.vue
@@ -1,6 +1,6 @@
 <template>
   <div v-if="alerts.length > 0" class="bg-destructive/10 border-b border-destructive/20">
-    <div class="px-4 sm:px-6 py-2 space-y-2">
+    <div class="px-4 sm:px-6 py-2 space-y-2 max-h-[230px] overflow-y-auto">
       <div
         v-for="alert in alerts"
         :key="alert.id"
diff --git a/src/locales/de.ts b/src/locales/de.ts
index c605ef9..083472d 100644
--- a/src/locales/de.ts
+++ b/src/locales/de.ts
@@ -866,7 +866,7 @@ export default {
     ships: 'Schiffe',
     spiedBy: 'Ausspioniert von',
     attackedBy: 'Angegriffen von',
-    detectionSuccess: 'Spionage entdeckt',
+    detectionSuccess: 'Du hast feindliche Spionage entdeckt!',
     detectionFailed: 'Spionage nicht entdeckt',
     npcSpiedYourPlanet: 'NPC hat deinen Planeten ausspioniert',
     npcAttackedYourPlanet: 'NPC hat deinen Planeten angegriffen'
diff --git a/src/locales/en.ts b/src/locales/en.ts
index e814d0b..5c32767 100644
--- a/src/locales/en.ts
+++ b/src/locales/en.ts
@@ -655,7 +655,7 @@ export default {
     spiedNotificationDetails: 'Spied Notification Details',
     spyDetected: 'Spy Detected',
     detectionResult: 'Detection Result',
-    detectionSuccess: 'Your spy probe was detected!',
+    detectionSuccess: 'You detected the enemy spy!',
     spiedNotificationMessage: '{npc} attempted to spy on your planet {planet}',
     spiedNotificationTip: 'Consider increasing your defense or counter-attacking if this NPC is hostile',
     viewInGalaxy: 'View in Galaxy',
diff --git a/src/locales/ja.ts b/src/locales/ja.ts
index 09cb640..bb71f30 100644
--- a/src/locales/ja.ts
+++ b/src/locales/ja.ts
@@ -856,7 +856,7 @@ export default {
     ships: '隻',
     spiedBy: '偵察された',
     attackedBy: '攻撃された',
-    detectionSuccess: '偵察が発見された',
+    detectionSuccess: '敵の偵察を発見した!',
     detectionFailed: '偵察が発見されなかった',
     npcSpiedYourPlanet: 'NPCがあなたの惑星を偵察しました',
     npcAttackedYourPlanet: 'NPCがあなたの惑星を攻撃しました'
diff --git a/src/locales/ko.ts b/src/locales/ko.ts
index 42874a6..fcabb6f 100644
--- a/src/locales/ko.ts
+++ b/src/locales/ko.ts
@@ -857,7 +857,7 @@ export default {
     ships: '척',
     spiedBy: '정찰당함',
     attackedBy: '공격당함',
-    detectionSuccess: '정찰 발견됨',
+    detectionSuccess: '적의 정찰을 발견했습니다!',
     detectionFailed: '정찰 미발견',
     npcSpiedYourPlanet: 'NPC가 당신의 행성을 정찰했습니다',
     npcAttackedYourPlanet: 'NPC가 당신의 행성을 공격했습니다'
diff --git a/src/locales/ru.ts b/src/locales/ru.ts
index 8c8bf5c..0ff07e0 100644
--- a/src/locales/ru.ts
+++ b/src/locales/ru.ts
@@ -864,7 +864,7 @@ export default {
     ships: 'кораблей',
     spiedBy: 'Разведан',
     attackedBy: 'Атакован',
-    detectionSuccess: 'Разведка обнаружена',
+    detectionSuccess: 'Вы обнаружили вражескую разведку!',
     detectionFailed: 'Разведка не обнаружена',
     npcSpiedYourPlanet: 'NPC разведал вашу планету',
     npcAttackedYourPlanet: 'NPC атаковал вашу планету'
diff --git a/src/locales/zh-CN.ts b/src/locales/zh-CN.ts
index 16b4111..4bb1a4e 100644
--- a/src/locales/zh-CN.ts
+++ b/src/locales/zh-CN.ts
@@ -650,7 +650,7 @@ export default {
     spiedNotificationDetails: '被侦查通知详情',
     spyDetected: '侦查被发现',
     detectionResult: '检测结果',
-    detectionSuccess: '你的侦查探测被发现了！',
+    detectionSuccess: '你发现了敌方侦查！',
     spiedNotificationMessage: '{npc}试图侦查你的星球{planet}',
     spiedNotificationTip: '考虑增强防御或反击，如果这个NPC对你有敌意',
     viewInGalaxy: '在星系中查看',
diff --git a/src/locales/zh-TW.ts b/src/locales/zh-TW.ts
index e16fb3f..1711d81 100644
--- a/src/locales/zh-TW.ts
+++ b/src/locales/zh-TW.ts
@@ -857,7 +857,7 @@ export default {
     ships: '艘艦船',
     spiedBy: '被偵查',
     attackedBy: '被攻擊',
-    detectionSuccess: '偵查被發現',
+    detectionSuccess: '你發現了敵方偵查！',
     detectionFailed: '偵查未被發現',
     npcSpiedYourPlanet: 'NPC偵查了你的星球',
     npcAttackedYourPlanet: 'NPC攻擊了你的星球'
diff --git a/src/logic/npcGrowthLogic.ts b/src/logic/npcGrowthLogic.ts
index 0e60b49..fae6b2c 100644
--- a/src/logic/npcGrowthLogic.ts
+++ b/src/logic/npcGrowthLogic.ts
@@ -23,25 +23,25 @@ export interface NPCGrowthGameState {
 // NPC成长配置（旧版，保留用于兼容）
 export const NPC_GROWTH_CONFIG = {
   easy: {
-    powerRatio: 1.0, // 实力比例(相对玩家) - 提升到1.0,与玩家势均力敌
+    powerRatio: 0.6, // 实力比例(相对玩家)
     checkInterval: 300, // 检查间隔(秒) - 5分钟
-    resourceGrowthRate: 1.3, // 资源增长速率系数 - 大幅提升
-    buildingGrowthSpeed: 1.0, // 建筑升级速度系数
-    techGrowthSpeed: 1.0 // 科技研究速度系数
+    resourceGrowthRate: 0.5, // 资源增长速率系数
+    buildingGrowthSpeed: 0.5, // 建筑升级速度系数
+    techGrowthSpeed: 0.5 // 科技研究速度系数
   },
   medium: {
-    powerRatio: 1.5, // 提升到1.5,超越玩家
+    powerRatio: 0.8,
     checkInterval: 180, // 3分钟
-    resourceGrowthRate: 1.8, // 大幅提升资源增长
-    buildingGrowthSpeed: 1.5,
-    techGrowthSpeed: 1.5
+    resourceGrowthRate: 0.8,
+    buildingGrowthSpeed: 0.8,
+    techGrowthSpeed: 0.8
   },
   hard: {
-    powerRatio: 2.0, // 提升到2.0,远超玩家
+    powerRatio: 1.1,
     checkInterval: 120, // 2分钟
-    resourceGrowthRate: 2.5, // 极高资源增长
-    buildingGrowthSpeed: 2.0,
-    techGrowthSpeed: 2.0
+    resourceGrowthRate: 1.2,
+    buildingGrowthSpeed: 1.0,
+    techGrowthSpeed: 1.0
   }
 } as const
 
@@ -61,58 +61,58 @@ export const calculateDynamicDifficulty = (playerPoints: number): DynamicDifficu
   // 积分区间和对应的难度参数
   if (playerPoints < 1000) {
     // 新手期：0-1,000分
-    // NPC保持50-70%实力，给予发展空间但保持挑战
-    const ratio = 0.5 + (playerPoints / 1000) * 0.2
+    // NPC保持30-50%实力，给予充分发展空间，但资源增长速度加快
+    const ratio = 0.3 + (playerPoints / 1000) * 0.2
     return {
       powerRatio: ratio,
       checkInterval: 300, // 5分钟
-      resourceGrowthRate: 1.2, // 提升资源增长,确保NPC快速发育
-      buildingGrowthSpeed: 0.8,
-      techGrowthSpeed: 0.8
+      resourceGrowthRate: 0.8, // 从0.4提升到0.8，确保NPC有足够资源发育
+      buildingGrowthSpeed: 0.6, // 从0.4提升到0.6
+      techGrowthSpeed: 0.6 // 从0.4提升到0.6
     }
   } else if (playerPoints < 5000) {
     // 初级期：1,000-5,000分
-    // NPC保持70-110%实力，快速追赶玩家
-    const ratio = 0.7 + ((playerPoints - 1000) / 4000) * 0.4
+    // NPC保持50-70%实力，逐渐增加挑战
+    const ratio = 0.5 + ((playerPoints - 1000) / 4000) * 0.2
     return {
       powerRatio: ratio,
       checkInterval: 240, // 4分钟
-      resourceGrowthRate: 1.5, // 大幅提升资源增长速度
-      buildingGrowthSpeed: 1.2,
-      techGrowthSpeed: 1.2
+      resourceGrowthRate: 1.0, // 从0.6提升到1.0，与玩家资源产出相当
+      buildingGrowthSpeed: 0.8, // 从0.6提升到0.8
+      techGrowthSpeed: 0.8 // 从0.6提升到0.8
     }
   } else if (playerPoints < 20000) {
     // 中级期：5,000-20,000分
-    // NPC保持110-150%实力，形成强大威胁
-    const ratio = 1.1 + ((playerPoints - 5000) / 15000) * 0.4
+    // NPC保持70-90%实力，持续挑战
+    const ratio = 0.7 + ((playerPoints - 5000) / 15000) * 0.2
     return {
       powerRatio: ratio,
       checkInterval: 180, // 3分钟
-      resourceGrowthRate: 1.8, // 极大幅提升资源增长
-      buildingGrowthSpeed: 1.5,
-      techGrowthSpeed: 1.5
+      resourceGrowthRate: 0.8,
+      buildingGrowthSpeed: 0.8,
+      techGrowthSpeed: 0.8
     }
   } else if (playerPoints < 50000) {
     // 高级期：20,000-50,000分
-    // NPC保持150-200%实力，远超玩家
-    const ratio = 1.5 + ((playerPoints - 20000) / 30000) * 0.5
+    // NPC保持90-110%实力，与玩家势均力敌
+    const ratio = 0.9 + ((playerPoints - 20000) / 30000) * 0.2
     return {
       powerRatio: ratio,
       checkInterval: 150, // 2.5分钟
-      resourceGrowthRate: 2.2, // 极高资源增长
-      buildingGrowthSpeed: 1.8,
-      techGrowthSpeed: 1.8
+      resourceGrowthRate: 1.0,
+      buildingGrowthSpeed: 1.0,
+      techGrowthSpeed: 1.0
     }
   } else {
     // 专家期：50,000+分
-    // NPC保持200-250%实力，成为超强对手
-    const ratio = Math.min(2.5, 2.0 + ((playerPoints - 50000) / 50000) * 0.5)
+    // NPC保持110-130%实力，超越玩家
+    const ratio = Math.min(1.3, 1.1 + ((playerPoints - 50000) / 50000) * 0.2)
     return {
       powerRatio: ratio,
       checkInterval: 120, // 2分钟
-      resourceGrowthRate: 2.5, // 极高的资源增长速度
-      buildingGrowthSpeed: 2.0,
-      techGrowthSpeed: 2.0
+      resourceGrowthRate: 1.2,
+      buildingGrowthSpeed: 1.2,
+      techGrowthSpeed: 1.2
     }
   }
 }
diff --git a/src/utils/migration.ts b/src/utils/migration.ts
index 79c478f..cbbbe4f 100644
--- a/src/utils/migration.ts
+++ b/src/utils/migration.ts
@@ -68,13 +68,18 @@ export const migrateGameData = (): void => {
 
     // 修复NPC数据（确保所有必需字段都存在）
     if (oldData.npcs && Array.isArray(oldData.npcs)) {
+      const now = Date.now()
       oldData.npcs.forEach((npc: NPC) => {
-        // 确保NPC有必需的时间字段
-        if (npc.lastSpyTime === undefined) {
-          npc.lastSpyTime = 0
+        // 确保NPC有必需的时间字段，并设置随机冷却避免同时行动
+        if (npc.lastSpyTime === undefined || npc.lastSpyTime === 0) {
+          // 0-4分钟的随机延迟
+          const randomSpyOffset = Math.random() * 240 * 1000
+          npc.lastSpyTime = now - randomSpyOffset
         }
-        if (npc.lastAttackTime === undefined) {
-          npc.lastAttackTime = 0
+        if (npc.lastAttackTime === undefined || npc.lastAttackTime === 0) {
+          // 0-8分钟的随机延迟
+          const randomAttackOffset = Math.random() * 480 * 1000
+          npc.lastAttackTime = now - randomAttackOffset
         }
         // 确保NPC有必需的数组字段
         if (!npc.fleetMissions) {