diff --git a/monitor.py b/monitor.py
index 040a5f6..114d338 100644
--- a/monitor.py
+++ b/monitor.py
@@ -238,21 +238,19 @@ class MessageMonitor:
                     cls = win32gui.GetClassName(top)
                     title = win32gui.GetWindowText(top)
                     title_upper = title.upper().strip()
-                    # 规则A: Chrome_WidgetWin_1 → QQ NT Electron 主窗口（标题是群名/昵称，不含QQ/TIM）
-                    if "Chrome" in cls:
+                    # _enum_callback 只加了 QQ/TIM 相关窗口，所以 found 里都是有效候选
+                    # 优先选标题含 QQ/TIM 的（传统模式），其次任何 TXGuiFoundation 或 Chrome 都接受
+                    if "TIM" in title_upper:
+                        self._app_variant[platform] = "tim"
+                    else:
                         self._app_variant[platform] = "qq_nt"
-                        self._cached_hwnd[platform] = top
-                        self._cached_pid[platform] = win32process.GetWindowThreadProcessId(top)[1]
+                    self._cached_hwnd[platform] = top
+                    self._cached_pid[platform] = win32process.GetWindowThreadProcessId(top)[1]
+                    if "Chrome" in cls:
                         logger.info(f"[{platform}] 窗口已定位(Electron Chrome): {title} top={top}")
-                        return top
-                    # 规则B: 标题含 QQ/TIM → 传统 QQ / TIM 主窗口
-                    if "QQ" in title_upper or "TIM" in title_upper:
-                        self._app_variant[platform] = "tim" if "TIM" in title_upper else "qq_nt"
-                        self._cached_hwnd[platform] = top
-                        self._cached_pid[platform] = win32process.GetWindowThreadProcessId(top)[1]
+                    else:
                         logger.info(f"[{platform}] 窗口已定位(Win32 Enum): {title} top={top}")
-                        return top
-                    logger.debug(f"[{platform}] Enum 候选跳过: cls={cls} title={title[:30]} top={top}")
+                    return top
             except Exception:
                 pass
             # 3. UIA 按窗口名搜索（兜底，可能慢但不挂死）