diff --git a/backend/scripts/run_parallel_simulation.py b/backend/scripts/run_parallel_simulation.py
index e9bb943..bc352c6 100644
--- a/backend/scripts/run_parallel_simulation.py
+++ b/backend/scripts/run_parallel_simulation.py
@@ -1019,9 +1019,16 @@ def create_model(config: Dict[str, Any], use_boost: bool = False):
     if not llm_model:
         llm_model = config.get("llm_model", "gpt-4o-mini")
     
+    # Set env vars for camel-ai factory check (required)
+    if llm_api_key:
+        os.environ["OPENAI_API_KEY"] = llm_api_key
+    
     if not llm_api_key:
         raise ValueError("LLM_API_KEY not configured. Set it in .env file.")
     
+    if llm_base_url:
+        os.environ["OPENAI_BASE_URL"] = llm_base_url
+    
     print(f"{config_label} model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
     
     # camel-ai reads OPENAI_API_KEY from env automatically
diff --git a/backend/scripts/run_reddit_simulation.py b/backend/scripts/run_reddit_simulation.py
index fdd73cb..b2fe977 100644
--- a/backend/scripts/run_reddit_simulation.py
+++ b/backend/scripts/run_reddit_simulation.py
@@ -449,9 +449,16 @@ class RedditSimulationRunner:
         if not llm_model:
             llm_model = self.config.get("llm_model", "gpt-4o-mini")
         
+        # Set env vars for camel-ai factory check (required)
+        if llm_api_key:
+            os.environ["OPENAI_API_KEY"] = llm_api_key
+        
         if not llm_api_key:
             raise ValueError("LLM_API_KEY not configured. Set it in .env file.")
         
+        if llm_base_url:
+            os.environ["OPENAI_BASE_URL"] = llm_base_url
+        
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
         
         # Pass api_key and base_url via model_config_dict
diff --git a/backend/scripts/run_twitter_simulation.py b/backend/scripts/run_twitter_simulation.py
index 61c6c13..71d6368 100644
--- a/backend/scripts/run_twitter_simulation.py
+++ b/backend/scripts/run_twitter_simulation.py
@@ -442,9 +442,16 @@ class TwitterSimulationRunner:
         if not llm_model:
             llm_model = self.config.get("llm_model", "gpt-4o-mini")
         
+        # Set env vars for camel-ai factory check (required)
+        if llm_api_key:
+            os.environ["OPENAI_API_KEY"] = llm_api_key
+        
         if not llm_api_key:
             raise ValueError("LLM_API_KEY not configured. Set it in .env file.")
         
+        if llm_base_url:
+            os.environ["OPENAI_BASE_URL"] = llm_base_url
+        
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
         
         # Pass api_key and base_url via model_config_dict
diff --git a/frontend/src/components/Step2EnvSetup.vue b/frontend/src/components/Step2EnvSetup.vue
index a27ba34..5b724e7 100644
--- a/frontend/src/components/Step2EnvSetup.vue
+++ b/frontend/src/components/Step2EnvSetup.vue
@@ -1369,6 +1369,7 @@ onUnmounted(() => {
   font-size: 14px;
   font-weight: 700;
   color: #000;
+  font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans Thai', 'Sarabun', 'Kanit', system-ui, sans-serif;
 }
 
 .profile-username {