```

feat(PlayerSkillSystem): 实现天雷狂轰技能特效和伤害机制

- 添加技能2特效配置，包括落雷击中特效和雷暴全屏光环特效
- 更新技能2名称从"全屏AOE伤害"为"全屏天雷狂轰伤害"
- 实现屏幕中央触发全屏雷暴光环效果
- 添加交错落雷机制，对敌方单位进行精确打击
- 支持无敌人时在敌方阵地随机散落震撼天雷
- 优化伤害计算和冷却逻辑
- 同步更新技能日志信息和代码注释
```

Assets/Scripts/技能脚本/PlayerSkillSystem.cs

@@ -33,6 +33,10 @@ public class PlayerSkillSystem : MonoBehaviour
     public float skill2Damage = 80f;
     private float skill2RemainingCooldown = 0f;
 
+    [Header("技能2特效配置")]
+    public GameObject lightningStrikePrefab; // 落雷击中特效 (Assets/TJGeneratorLibEffects/Prefabs/Combat/Explosions/LightningExplosion/LightningExplosionBlue.prefab)
+    public GameObject lightningNovaPrefab;   // 雷暴全屏光环特效 (Assets/TJGeneratorLibEffects/Prefabs/Combat/Nova/Lightning/NovaLightningBlue.prefab)
+
     private void Awake()
     {
         Instance = this;
@@ -277,7 +281,7 @@ public class PlayerSkillSystem : MonoBehaviour
     }
 
     /// <summary>
-    /// 使用技能2：全屏AOE伤害
+    /// 使用技能2：全屏天雷狂轰伤害
     /// </summary>
     public void UseSkill2()
     {
@@ -287,32 +291,103 @@ public class PlayerSkillSystem : MonoBehaviour
         }
 
         float finalDamage = skill2Damage * powerMultiplier;
-        Debug.Log($"释放技能2：全屏AOE（造成 {finalDamage:F1} 伤害，威力倍率: {powerMultiplier:F2}）");
+        Debug.Log($"释放技能2：天雷狂轰（造成 {finalDamage:F1} 伤害，威力倍率: {powerMultiplier:F2}）");
 
-        // 对所有敌方单位造成伤害
-        var enemies = FindObjectsOfType<UnitBase>();
-        int hitCount = 0;
-
-        foreach (var unit in enemies)
+        // 加载特效资源
+        GameObject strikePrefab = lightningStrikePrefab;
+#if UNITY_EDITOR
+        if (strikePrefab == null)
         {
+            strikePrefab = UnityEditor.AssetDatabase.LoadAssetAtPath<GameObject>("Assets/TJGeneratorLibEffects/Prefabs/Combat/Explosions/LightningExplosion/LightningExplosionBlue.prefab");
+        }
+#endif
+
+        GameObject novaPrefab = lightningNovaPrefab;
+#if UNITY_EDITOR
+        if (novaPrefab == null)
+        {
+            novaPrefab = UnityEditor.AssetDatabase.LoadAssetAtPath<GameObject>("Assets/TJGeneratorLibEffects/Prefabs/Combat/Nova/Lightning/NovaLightningBlue.prefab");
+        }
+#endif
+
+        // 1. 屏幕中央触发全屏雷暴光环
+        if (novaPrefab != null)
+        {
+            Vector3 centerPos = new Vector3(0f, 0.1f, 0f);
+            var novaGo = Instantiate(novaPrefab, centerPos, novaPrefab.transform.rotation);
+            Destroy(novaGo, 3.5f);
+        }
+
+        // 2. 检索所有活着的敌方单位
+        var allUnits = FindObjectsOfType<UnitBase>();
+        var targetEnemies = new System.Collections.Generic.List<UnitBase>();
+
+        foreach (var unit in allUnits)
+        {
+            if (unit == null || !unit.gameObject.activeInHierarchy) continue;
             var team = unit.GetComponent<UnitTeam>();
             if (team != null && team.teamId == 1) // 敌方
             {
                 var healthBar = unit.GetComponent<WorldHealthBar>();
                 if (healthBar != null && !healthBar.IsDead)
                 {
-                    healthBar.TakeDamage(finalDamage);
-                    hitCount++;
+                    targetEnemies.Add(unit);
                 }
             }
         }
 
-        Debug.Log($"全屏AOE命中 {hitCount} 个敌人");
+        StartCoroutine(ExecuteLightningStrikesRoutine(targetEnemies, strikePrefab, finalDamage));
 
         // 开始冷却
         skill2RemainingCooldown = skill2Cooldown * cooldownMultiplier;
+    }
 
-        // TODO: 播放技能特效
+    private System.Collections.IEnumerator ExecuteLightningStrikesRoutine(
+        System.Collections.Generic.List<UnitBase> targetEnemies,
+        GameObject strikePrefab,
+        float finalDamage)
+    {
+        if (targetEnemies.Count > 0)
+        {
+            // 敌群交错落雷
+            for (int i = 0; i < targetEnemies.Count; i++)
+            {
+                var enemy = targetEnemies[i];
+                if (enemy != null && enemy.gameObject.activeInHierarchy)
+                {
+                    Vector3 strikePos = enemy.transform.position;
+                    strikePos.y = 0.1f;
+
+                    if (strikePrefab != null)
+                    {
+                        var strikeGo = Instantiate(strikePrefab, strikePos, strikePrefab.transform.rotation);
+                        Destroy(strikeGo, 3f);
+                    }
+
+                    var healthBar = enemy.GetComponent<WorldHealthBar>();
+                    if (healthBar != null && !healthBar.IsDead)
+                    {
+                        healthBar.TakeDamage(finalDamage);
+                    }
+                }
+
+                yield return new WaitForSeconds(0.08f); // 80毫秒交错落雷节奏
+            }
+        }
+        else
+        {
+            // 无敌人时在敌方阵地随机散落 6 道震撼天雷
+            for (int i = 0; i < 6; i++)
+            {
+                Vector3 randomPos = new Vector3(Random.Range(-5f, 5f), 0.1f, Random.Range(2f, 12f));
+                if (strikePrefab != null)
+                {
+                    var strikeGo = Instantiate(strikePrefab, randomPos, strikePrefab.transform.rotation);
+                    Destroy(strikeGo, 3f);
+                }
+                yield return new WaitForSeconds(0.08f);
+            }
+        }
     }
 
     /// <summary>