diff --git a/src/utils/html_generator.py b/src/utils/html_generator.py
index 7d40852..784ff8c 100644
--- a/src/utils/html_generator.py
+++ b/src/utils/html_generator.py
@@ -97,7 +97,14 @@ class HTMLGenerator:
                 </div>
                 """
         else:
-            logger.warning("cavity_data 为空，无法显示工艺参数")
+            logger.warning(f"cavity_data 为空，无法显示工艺参数 - 文件: {stp_filename}")
+            # 即使没有cavity_data，也生成一个空面板占位
+            cavity_html = """
+                <div id="cavity-info-panel" style="position: absolute; top: 10px; right: 10px; background: rgba(255,0,0,0.1); padding: 10px;">
+                    <h3>🔧 关键工艺参数</h3>
+                    <div style="color: red;">数据未加载</div>
+                </div>
+                """
         html_content = f"""
 <!DOCTYPE html>
 <html lang="zh-CN">
