diff --git a/assets/script/game/hero/BossPhaseSystem.ts b/assets/script/game/hero/BossPhaseSystem.ts
index 53d3dea0..dfbcd25d 100644
--- a/assets/script/game/hero/BossPhaseSystem.ts
+++ b/assets/script/game/hero/BossPhaseSystem.ts
@@ -18,7 +18,9 @@ import { BossPhaseSet, PhaseSwitchDef } from "../common/config/BossPhaseSet";
 import { SkillSet } from "../common/config/SkillSet";
 import { mLogger } from "../common/Logger";
 import { HeroAttrsComp } from "./HeroAttrsComp";
+import { HeroViewComp } from "./HeroViewComp";
 import { BossPhaseComp } from "./BossPhaseComp";
+import { FlashSprite } from "./hit-flash-white/scripts/FlashSprite";
 
 /** 阶段模块调试日志开关 */
 const DEBUG = true;
@@ -124,6 +126,18 @@ export class BossPhaseSystem extends ecs.ComblockSystem implements ecs.ISystemUp
     /** TODO: 阶段退场表现（震屏/变暗等），后续迭代实现 */
     private onPhaseExit(e: ecs.Entity): void { }
 
-    /** TODO: 阶段入场表现（怒吼/无敌帧/技能横幅等），后续迭代实现 */
-    private onPhaseEnter(e: ecs.Entity): void { }
+    /** 阶段入场表现：切换阶段描边（P2 绿 / P3 红）；怒吼/无敌帧/横幅等后续迭代 */
+    private onPhaseEnter(e: ecs.Entity): void {
+        const view = e.get(HeroViewComp);
+        if (!view || !view.node || !view.node.isValid) return;
+        const phase = e.get(BossPhaseComp)!;
+        // FlashSprite 可能在根节点或子节点（anm）上，逐级查找
+        let flash = view.node.getComponent(FlashSprite);
+        if (!flash) {
+            flash = view.node.getComponentInChildren(FlashSprite);
+        }
+        if (flash) {
+            flash.setPhaseOutline(phase.index);
+        }
+    }
 }
diff --git a/assets/script/game/hero/HeroViewComp.ts b/assets/script/game/hero/HeroViewComp.ts
index ad23fd2c..ee369af2 100644
--- a/assets/script/game/hero/HeroViewComp.ts
+++ b/assets/script/game/hero/HeroViewComp.ts
@@ -576,6 +576,17 @@ export class HeroViewComp extends CCComp {
         // }
     }
 
+    /** 复位阶段描边为默认（Boss 池化复用必经路径，防红/绿描边残留到下一个复用者） */
+    public resetPhaseOutline() {
+        let flash = this.node.getComponent(FlashSprite);
+        if (!flash) {
+            flash = this.node.getComponentInChildren(FlashSprite);
+        }
+        if (flash) {
+            flash.setPhaseOutline(0);
+        }
+    }
+
 }
 
 
diff --git a/assets/script/game/hero/Mon.ts b/assets/script/game/hero/Mon.ts
index 3d901d0a..2fb204fa 100644
--- a/assets/script/game/hero/Mon.ts
+++ b/assets/script/game/hero/Mon.ts
@@ -290,6 +290,10 @@ export class Monster extends ecs.Entity {
         // 注册视图组件并重置对象池复用状态
         this.add(view);
         view.init();
+        // 阶段 Boss：init 按 lv 设的等级描边与阶段描边冲突，复位为 P1 无描边（P2/P3 由 BossPhaseSystem 再上色）
+        if (this.has(BossPhaseComp)) {
+            view.resetPhaseOutline();
+        }
         view.as.idle();
         // 广播怪物加载事件，供刷怪与战斗系统联动
         oops.message.dispatchEvent("monster_load", this)
diff --git a/assets/script/game/hero/hit-flash-white/scripts/FlashSprite.ts b/assets/script/game/hero/hit-flash-white/scripts/FlashSprite.ts
index 45645a09..fe689e79 100644
--- a/assets/script/game/hero/hit-flash-white/scripts/FlashSprite.ts
+++ b/assets/script/game/hero/hit-flash-white/scripts/FlashSprite.ts
@@ -19,6 +19,9 @@ export class FlashSprite extends Component {
     @property({ type: Material, tooltip: '黄色描边材质(5级)' })
     outlineMatYellow: Material | null = null;
 
+    @property({ type: Material, tooltip: '红色描边材质(Boss阶段3)' })
+    outlineMatRed: Material | null = null;
+
     orginalFlashMaterial: Material | null = null;
     defaultMaterial: Material | null = null; // 缓存最原始的无描边材质
     sprite: Sprite | null = null;
@@ -64,6 +67,31 @@ export class FlashSprite extends Component {
         }
     }
 
+    /**
+     * 设置 Boss 阶段描边（与等级描边互斥，阶段优先）
+     * @param phase 阶段索引 0=P1(无描边/恢复默认) 1=P2(绿) 2=P3(红)
+     */
+    public setPhaseOutline(phase: number) {
+        if (!this.sprite) {
+            this.sprite = this.node.getComponent(Sprite);
+        }
+
+        let targetMat: Material | null = null;
+        if (phase === 1) {
+            targetMat = this.outlineMatGreen;
+        } else if (phase >= 2) {
+            targetMat = this.outlineMatRed;
+        } else {
+            // P1 / 复位：恢复最原始的无描边材质
+            targetMat = this.defaultMaterial;
+        }
+
+        if (targetMat && this.sprite) {
+            this.orginalFlashMaterial = targetMat;
+            this.sprite.setSharedMaterial(targetMat, 0);
+        }
+    }
+
     public clickFlash() {
         if (!this.sprite || !this.hitFlashMaterial) return;