diff --git a/gradio_ui.py b/gradio_ui.py
index cec96e2..db4cade 100644
--- a/gradio_ui.py
+++ b/gradio_ui.py
@@ -104,10 +104,10 @@ def stop_eval():
     if current_process and current_process.poll() is None:
         try:
             pgid = os.getpgid(current_process.pid)
-            os.killpg(pgid, signal.SIGINT)
+            os.killpg(pgid, signal.SIGINT)  # ✅ 优雅终止
             time.sleep(2)
             if current_process.poll() is None:
-                os.killpg(pgid, signal.SIGKILL)
+                os.killpg(pgid, signal.SIGKILL)  # ❗ 强制终止
             return "[✅ 已发送终止信号 (SIGINT → SIGKILL fallback)]\n"
         except Exception as e:
             return f"[❌ 终止失败: {e}]\n"
@@ -117,6 +117,7 @@ def stop_eval():
         return "[⚠️ 无活动 evalscope 进程]\n"
 
 
+
 # ---------------- Run/Stop 控制器 ----------------
 def toggle_run(
     inputs, native, other, output_choices,
@@ -128,6 +129,12 @@ def toggle_run(
     is_running
 ):
     global should_stop
+
+    if not inputs:
+        msg = "[❌ 错误] 必须至少选择一个输入源（API、本地、基准或自定义）才能开始运行。\n"
+        yield msg, False, gr.update(value="Run Evaluation")
+        return
+
     if not is_running:
         should_stop = False
         yield from run_eval(
@@ -143,12 +150,6 @@ def toggle_run(
         yield msg, False, gr.update(value="Run Evaluation")
 
 
-# ---------------- 禁用按钮逻辑 ----------------
-def update_button_enable(inputs, outputs):
-    enabled = bool(inputs or outputs)
-    return gr.update(interactive=enabled)
-
-
 # ---------------- 互斥逻辑 ----------------
 def enforce_input_exclusive_and_toggle_fields(selected):
     order = ["API Models", "Local Models", "Benchmarks", "Custom Datasets"]
@@ -168,7 +169,9 @@ def enforce_input_exclusive_and_toggle_fields(selected):
     final_list = [itm for itm in order if itm in final_sel]
 
     input_update = gr.update() if list(selected) == final_list else gr.update(value=final_list)
-    api_field_update = gr.update(visible="API Models" in final_sel)
+
+    show_api_fields = "API Models" in final_sel
+    api_field_update = gr.update(visible=show_api_fields)  # ✅ 正确
 
     return input_update, api_field_update
 
@@ -177,6 +180,7 @@ def enforce_input_exclusive_and_toggle_fields(selected):
 with gr.Blocks(title="EvalScope 全功能界面") as demo:
     is_running = gr.State(value=False)
 
+    # ===== 输入源 =====
     with gr.Group():
         with gr.Row():
             input_choices = gr.CheckboxGroup(
@@ -185,9 +189,17 @@ with gr.Blocks(title="EvalScope 全功能界面") as demo:
                 interactive=True
             )
 
+    # ===== API 地址 & 运行参数（统一控制显示） =====
     with gr.Column(visible=False) as api_fields:
-        api_url_input = gr.Textbox(label="API 地址", placeholder="https://api.example.com/v1/chat")
-        api_token_input = gr.Textbox(label="Token 密钥", type="password", placeholder="sk-xxx")
+        api_url_input = gr.Textbox(
+            label="API 地址",
+            placeholder="https://api.example.com/v1/chat"
+        )
+        api_token_input = gr.Textbox(
+            label="Token 密钥",
+            type="password",
+            placeholder="sk-xxx"
+        )
         with gr.Accordion("运行参数（可选修改）", open=False):
             with gr.Row():
                 api_provider_dropdown = gr.Dropdown(
@@ -205,13 +217,29 @@ with gr.Blocks(title="EvalScope 全功能界面") as demo:
                 placeholder="e.g. my-llm-7b"
             )
             with gr.Row():
-                max_tokens_slider = gr.Slider("Max Tokens (--max-tokens)", 256, 8192, 256, value=1024)
-                min_tokens_slider = gr.Slider("Min Tokens (--min-tokens)", 0, 4096, 64, value=1024)
+                max_tokens_slider = gr.Slider(
+                    label="Max Tokens (--max-tokens)",
+                    minimum=256, maximum=8192, step=256, value=1024
+                )
+                min_tokens_slider = gr.Slider(
+                    label="Min Tokens (--min-tokens)",
+                    minimum=0, maximum=4096, step=64, value=1024
+                )
             with gr.Row():
-                parallel_slider = gr.Slider("并发请求数 (--parallel)", 1, 16, 1, value=1)
-                num_req_slider = gr.Slider("请求条数 (--number)", 1, 1000, 1, value=100)
-            max_prompt_len_slider = gr.Slider("最大 Prompt 长度 (--max-prompt-length)", 2048, 32768, 512, value=15360)
+                parallel_slider = gr.Slider(
+                    label="并发请求数 (--parallel)",
+                    minimum=1, maximum=16, step=1, value=1
+                )
+                num_req_slider = gr.Slider(
+                    label="请求条数 (--number)",
+                    minimum=1, maximum=1000, step=1, value=100
+                )
+            max_prompt_len_slider = gr.Slider(
+                label="最大 Prompt 长度 (--max-prompt-length)",
+                minimum=2048, maximum=32768, step=512, value=15360
+            )
 
+    # ===== 本地/外部组件 =====
     with gr.Row():
         with gr.Column():
             native_choices = gr.CheckboxGroup(
@@ -224,13 +252,14 @@ with gr.Blocks(title="EvalScope 全功能界面") as demo:
                 choices=["OpenCompass", "VLMEvalKit", "RAGAS", "MTEB/CMTEB"]
             )
 
+    # ===== 输出形式 =====
     output_choices = gr.CheckboxGroup(
         label="输出形式",
         choices=["Evaluation Report", "Gradio", "WandB", "Swanlab"]
     )
 
-    run_button = gr.Button("Run Evaluation", interactive=False)
-
+    # ===== 控制按钮 & 日志 =====
+    run_button = gr.Button("Run Evaluation")
     output_text = gr.TextArea(
         label="执行结果",
         lines=20,
@@ -238,22 +267,11 @@ with gr.Blocks(title="EvalScope 全功能界面") as demo:
         show_copy_button=True
     )
 
+    # ===== 绑定事件 =====
     input_choices.change(
         fn=enforce_input_exclusive_and_toggle_fields,
         inputs=input_choices,
-        outputs=[input_choices, api_fields]
-    )
-
-    input_choices.change(
-        fn=update_button_enable,
-        inputs=[input_choices, output_choices],
-        outputs=run_button
-    )
-
-    output_choices.change(
-        fn=update_button_enable,
-        inputs=[input_choices, output_choices],
-        outputs=run_button
+        outputs=[input_choices, api_fields]  # ✅ 只输出这两个
     )
 
     run_button.click(