diff --git a/_quarto.yml b/_quarto.yml
index efd4286..c6b52a9 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -24,7 +24,7 @@ website:
   page-navigation: true
   page-footer: "Copyright 2024, [Ming Su](https://drwater.rcees.ac.cn)"
   navbar:
-    background: "grey"
+    background: "light"
     search: true
     right:
       - icon: house
diff --git a/data/writexldemo.xlsx b/data/writexldemo.xlsx
index 2ea0117..55c9a59 100644
Binary files a/data/writexldemo.xlsx and b/data/writexldemo.xlsx differ