diff --git a/Assets/_Game/Scripts/Core/Save/EmergencySaveService.cs b/Assets/_Game/Scripts/Core/Save/EmergencySaveService.cs
index ca4cf9b..acd37aa 100644
--- a/Assets/_Game/Scripts/Core/Save/EmergencySaveService.cs
+++ b/Assets/_Game/Scripts/Core/Save/EmergencySaveService.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Threading.Tasks;
 using UnityEngine;
 using BaseGames.Core.Events;
@@ -32,7 +33,16 @@ namespace BaseGames.Core.Save
             if (_timer >= _intervalSeconds)
             {
                 _timer = 0f;
-                _ = _saveManager.SaveAsync(EmergencySlot);
+                RunFireAndForget(_saveManager.SaveAsync(EmergencySlot), "EmergencySave");
+            }
+        }
+
+        private static async void RunFireAndForget(System.Threading.Tasks.Task task, string context)
+        {
+            try { await task; }
+            catch (Exception e)
+            {
+                UnityEngine.Debug.LogError($"[EmergencySave] {context} 失败: {e.Message}\n{e.StackTrace}");
             }
         }
 
diff --git a/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs b/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
index 74fdf17..80dc7f1 100644
--- a/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
+++ b/Assets/_Game/Scripts/Core/Save/GameSaveManager.cs
@@ -88,12 +88,13 @@ namespace BaseGames.Core.Save
                 _current.Meta.SlotIndex = targetSlot;
                 _current.Meta.SaveCount++;
 
-                // 先清空 checksum，序列化并计算，再序列化含 checksum 的最终版本
-                // 使用 Formatting.None 减少序列化字符串体积和 GC 分配
+                // 清空 checksum 后序列化，计算 HMAC，然后直接注入序列化字符串——避免第二次完整序列化。
+                // Base64 字符集（A-Z a-z 0-9 + / =）不含需要 JSON 转义的字符，string.Replace 是安全替换。
                 _current.Meta.Checksum = null;
                 string jsonForChecksum = JsonConvert.SerializeObject(_current, Formatting.None);
-                _current.Meta.Checksum = ComputeChecksum(jsonForChecksum);
-                string finalJson = JsonConvert.SerializeObject(_current, Formatting.None);
+                string checksum        = ComputeChecksum(jsonForChecksum);
+                string finalJson       = jsonForChecksum.Replace("\"Checksum\":null", $"\"Checksum\":\"{checksum}\"");
+                _current.Meta.Checksum = checksum; // 同步回内存，保持对象一致
 
                 await _storage.WriteAsync(targetSlot, finalJson);
 
diff --git a/Assets/_Game/Scripts/Core/Save/SaveData.cs b/Assets/_Game/Scripts/Core/Save/SaveData.cs
index 79a6e91..2e2cf69 100644
--- a/Assets/_Game/Scripts/Core/Save/SaveData.cs
+++ b/Assets/_Game/Scripts/Core/Save/SaveData.cs
@@ -128,8 +128,7 @@ namespace BaseGames.Core.Save
     [Serializable]
     public class QuestSaveData
     {
-        public Dictionary<string, QuestState> QuestStates    = new();
-        public List<string>                   AvailableQuestIds = new();
+        public Dictionary<string, QuestState> QuestStates = new();
     }
 
     [Serializable]
diff --git a/Assets/_Game/Scripts/Core/Save/SaveMigrator.cs b/Assets/_Game/Scripts/Core/Save/SaveMigrator.cs
index 240f672..dc11472 100644
--- a/Assets/_Game/Scripts/Core/Save/SaveMigrator.cs
+++ b/Assets/_Game/Scripts/Core/Save/SaveMigrator.cs
@@ -50,10 +50,7 @@ namespace BaseGames.Core.Save
                 // 2.2 删除 PlayerSaveData.ShieldHP / ShieldIsBroken（护盾在存档点始终全满，无需持久化）。
                 // SettingsSaveData.Language 字段保留（由 LocalizationManager 负责按存档槽读写）。
                 // 旧存档中已删除的字段由 Newtonsoft.Json 的 [JsonExtensionData] 忽略，无需额外处理。
-                // Equipment.MaxNotches：旧存档若为 0，EquipmentManager.OnLoad 回退到初始 Notch 数量。
-                if (data.Equipment != null && data.Equipment.MaxNotches == 0)
-                    data.Equipment.MaxNotches = 0; // 保持 0，OnLoad 回退到 config.initialNotchCount
-
+                // Equipment.MaxNotches：旧存档若为 0，EquipmentManager.OnLoad 回退到 config.initialNotchCount，无需额外处理。
                 Debug.Log("[SaveMigrator] 从 '2.1' 迁移至 '2.2'。");
                 v = "2.2";
             }
diff --git a/Assets/_Game/Scripts/Quest/QuestManager.cs b/Assets/_Game/Scripts/Quest/QuestManager.cs
index fc85aed..c465e3d 100644
--- a/Assets/_Game/Scripts/Quest/QuestManager.cs
+++ b/Assets/_Game/Scripts/Quest/QuestManager.cs
@@ -129,7 +129,6 @@ namespace BaseGames.Quest
         public void OnSave(SaveData data)
         {
             data.Quests.QuestStates.Clear();
-            data.Quests.AvailableQuestIds.Clear();
             foreach (var (id, state) in _questStates)
             {
                 data.Quests.QuestStates[id] = new BaseGames.Core.Save.QuestState
@@ -138,7 +137,6 @@ namespace BaseGames.Quest
                     ObjectiveIndex  = 0,
                     ProgressCounts  = BuildProgressList(id),
                 };
-                if (state == QuestStateEnum.Available) data.Quests.AvailableQuestIds.Add(id);
             }
         }
 
diff --git a/Assets/_Game/Scripts/World/SavePoint.cs b/Assets/_Game/Scripts/World/SavePoint.cs
index d4223d0..875defc 100644
--- a/Assets/_Game/Scripts/World/SavePoint.cs
+++ b/Assets/_Game/Scripts/World/SavePoint.cs
@@ -1,3 +1,5 @@
+using System;
+using System.Threading.Tasks;
 using UnityEngine;
 using BaseGames.Core;
 using BaseGames.Core.Events;
@@ -68,7 +70,7 @@ namespace BaseGames.World
             // 触发存档：OnSave() 由 SaveAsync 回调所有 ISaveable，包含本组件
             var svc = ServiceLocator.GetOrDefault<ISaveService>();
             if (svc != null)
-                _ = svc.SaveAsync(svc.ActiveSlot);
+                RunFireAndForget(svc.SaveAsync(svc.ActiveSlot));
             else
                 Debug.LogWarning("[SavePoint] ISaveService 未注册，跳过存档。", this);
         }
@@ -101,6 +103,14 @@ namespace BaseGames.World
             _isActivated = !string.IsNullOrEmpty(_savePointId)
                 && data.World.ActivatedSavePoints.Contains(_savePointId);
         }
+
+        private static async void RunFireAndForget(Task task)
+        {
+            try { await task; }
+            catch (Exception e)
+            {
+                Debug.LogError($"[SavePoint] 存档失败: {e.Message}\n{e.StackTrace}");
+            }
+        }
     }
 }
-