diff --git a/monitor.py b/monitor.py
index d4aaceb..0d02558 100644
--- a/monitor.py
+++ b/monitor.py
@@ -570,8 +570,8 @@ class MessageMonitor:
             # 先切 QQ 到前台再截屏，避免 CMD 窗口遮挡→OCR 读到终端文字
             self._ensure_foreground(hwnd)
             time.sleep(0.15)
-            # 左边界进一步往左调到 40%，捕获消息文字（而非时间戳/UI 碎片）
-            cap_left = int(left + win_w * 0.40)
+            # 左边界调到 33%，捕获更靠左的消息文字
+            cap_left = int(left + win_w * 0.33)
             cap_top = top + max(40, int(win_h * 0.04))      # 标题栏下方
             cap_right = int(left + win_w * 0.95)            # 跳过滚动条
             cap_bottom = bottom - max(100, int(win_h * 0.10))  # 输入框上方