diff --git a/Docs/30_architecture/main.md b/Docs/30_architecture/main.md
index 7f995e3..5ee7b15 100644
--- a/Docs/30_architecture/main.md
+++ b/Docs/30_architecture/main.md
@@ -132,7 +132,7 @@ graph TD
         MOTOR[振动马达脉冲时序]
     end
     subgraph Layer1 ["硬件抽象与时基层 (HW)"]
-        Timer1[Timer 1 中断 (1ms 滴答)]
+        Timer1["Timer 1 中断 (1ms 滴答)"]
         ADC[12位电压采集]
         Flash[IAP 读写]
         GPIO[数字 I/O 与电平中断]