Update app.py

app.py

@@ -105,6 +105,7 @@ body {
     font-size: 17px;
     line-height: 1.8;
     width: 100%;
+    max-width: 760px;
     word-wrap: break-word;
     white-space: pre-wrap;
 }
@@ -385,4 +386,4 @@ if __name__ == "__main__":
     print(f"💾 Database: TiDB Cloud")
     print(f"🎨 UI Features: Code formatting + Copy button")
     print("="*60)
-    uvicorn.run(app, host="0.0.0.0", port=7860, log_level="info")
+    uvicorn.run(app, host="0.0.0.0", port=7860, log_level="info")