diff --git a/go/static/graph.html b/go/static/graph.html
index 22928c0..a7a3a34 100644
--- a/go/static/graph.html
+++ b/go/static/graph.html
@@ -327,7 +327,7 @@
       event: '#f85149'
     };
     
-    const API_BASE = 'http://100.65.23.30:7821';
+    const API_BASE = window.location.origin;
     const API_KEY = 'zhiyi-dev-key-2026';
     let nodes = [], links = [];
     let simulation, svg, g, linkGroup, nodeGroup, labelGroup;