diff --git a/book.toml b/book.toml
index a9b4553d..08a03bda 100644
--- a/book.toml
+++ b/book.toml
@@ -5,7 +5,7 @@ title = "Rust语言圣经(Rust教程 Rust Course)"
 src = "src"
 
 [output.html]
-additional-css = ["theme/style1.css"]
+additional-css = ["theme/style3.css"]
 additional-js = ["assets/custom0.js", "assets/bigPicture.js"]
 git-repository-url = "https://github.com/sunface/rust-course"
 edit-url-template = "https://github.com/sunface/rust-course/edit/main/{path}"
diff --git a/theme/style1.css b/theme/style3.css
similarity index 100%
rename from theme/style1.css
rename to theme/style3.css