diff --git a/README.md b/README.md
index 53d6ae6..00c106c 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@
 ![Architecture Overview](.doc/architecture-v2-overview.png)
 
 ```mermaid
+graph TD
     User(["👤 用户"]) <--> PM["👑 Team Coordinator (PM)"]
 
     subgraph "External Resources (MCP Protocol)"