diff --git a/config.py b/config.py
index 279b228..4858b9f 100644
--- a/config.py
+++ b/config.py
@@ -36,7 +36,7 @@ class Config:
     # AI API 配置
     AI_API = "https://ai.t8star.cn/v1/images/generations"
     AI_BASE_URL = "https://api.bltcy.ai"
-    AI_BACKUP_BASE_URL = ""
+    AI_BACKUP_BASE_URL = "https://ai.comfly.chat"
     CHAT_API = f"{AI_BASE_URL}/v1/chat/completions"
     VIDEO_GEN_API = f"{AI_BASE_URL}/v2/videos/generations"
     VIDEO_POLL_API = f"{AI_BASE_URL}/v2/videos/generations/{{task_id}}"
@@ -47,13 +47,13 @@ class Config:
     # 试用模式配置
     TRIAL_API = f"{AI_BASE_URL}/v1/images/generations"
     TRIAL_KEY = "sk-pxowRoSbyavisIbaVLdedS7g5UePzhIxsTfjlJFOuqTRYQzT"
-    TRIAL_BACKUP_KEY = "sk-pxowRoSbyavisIbaVLdedS7g5UePzhIxsTfjlJFOuqTRYQzT"
+    TRIAL_BACKUP_KEY = "sk-Rr8L5noW8Qga7K4jmey3yYZYL1a4SlhlNlo5iZrwqJRK1Pa1"
     PREMIUM_KEY = "sk-iMfeWAESLFIrHvxuBe2VbM4rC7ScZNvcaouqhVAd0J4KomYv"
-    PREMIUM_BACKUP_KEY = "sk-iMfeWAESLFIrHvxuBe2VbM4rC7ScZNvcaouqhVAd0J4KomYv"
+    PREMIUM_BACKUP_KEY = "sk-168trRxnemem6nTpQn1rbmJ4SFKLwTMsZ0G6uk5OipP7FKAY"
     VIDEO_KEY = "sk-pxowRoSbyavisIbaVLdedS7g5UePzhIxsTfjlJFOuqTRYQzT"
-    VIDEO_BACKUP_KEY = "sk-pxowRoSbyavisIbaVLdedS7g5UePzhIxsTfjlJFOuqTRYQzT"
+    VIDEO_BACKUP_KEY = "sk-Rr8L5noW8Qga7K4jmey3yYZYL1a4SlhlNlo5iZrwqJRK1Pa1"
     GEMINI_FLASH_IMAGE_PREMIUM_KEY = "sk-0vTMf4vJ0RMvLK4J5wtkRDu7pNEDD69piFcDyf31NCdEYTC1"
-    GEMINI_FLASH_IMAGE_PREMIUM_BACKUP_KEY = "sk-0vTMf4vJ0RMvLK4J5wtkRDu7pNEDD69piFcDyf31NCdEYTC1"
+    GEMINI_FLASH_IMAGE_PREMIUM_BACKUP_KEY = "sk-OEbEnJORrKx4YEnLPEbwQL3eS5sp0eeSbtUepUrsIqjaLc1X"
     
     DICT_URL = "https://nas.4x4g.com:10011/api/common/sys/dict"
     PLATFORM = "lingmao"
diff --git a/utils.py b/utils.py
index 9881a52..fbbc163 100644
--- a/utils.py
+++ b/utils.py
@@ -41,7 +41,7 @@ def get_backup_api_key(api_key):
         Config.VIDEO_KEY: Config.VIDEO_BACKUP_KEY,
         Config.GEMINI_FLASH_IMAGE_PREMIUM_KEY: Config.GEMINI_FLASH_IMAGE_PREMIUM_BACKUP_KEY,
     }
-    return fallback_map.get(api_key, api_key)
+    return fallback_map.get(api_key)
 
 def get_api_candidates(url, api_key):
     """
@@ -51,7 +51,7 @@ def get_api_candidates(url, api_key):
     backup_url = get_backup_api_url(url)
     backup_key = get_backup_api_key(api_key)
 
-    if backup_url and backup_url != url:
+    if backup_url and backup_url != url and backup_key:
         candidates.append({"url": backup_url, "api_key": backup_key, "label": "backup"})
 
     return candidates