diff --git a/config/_default/hugo.yaml b/config/_default/hugo.yaml
index 63e9bad..f761f22 100644
--- a/config/_default/hugo.yaml
+++ b/config/_default/hugo.yaml
@@ -11,71 +11,18 @@ enableEmoji: true
 permalinks:
   blog: /blog/:year/:month/:title
 
-module:
-  # For some regions can not access the proxy.golang.org, i.e. China.
-  # See https://hugomods.com/en/blog/2023/04/go-and-hugo-proxy-servers/ for all available proxy servers.
-  # proxy: https://goproxy.cn,direct
-
-  # The order of module is very important, precedence from top to bottom.
-  imports:
-    # gallery modules.
-    - path: github.com/hbstack/gallery
-    - path: github.com/hbstack/gallery/modules/breadcrumb
-
-    # syntax highlighting, see https://hbstack.dev/en/docs/modules/syntax-highlighting/.
-    # - path: github.com/hbstack/syntax-highlighting/styles/github-dark
-  
-    # icons modules
-    - path: github.com/hugomods/icons/vendors/font-awesome
-    # - path: github.com/hugomods/icons/vendors/mdi
-    # - path: github.com/hugomods/icons/vendors/simple-icons
-    # - path: github.com/hugomods/icons/vendors/tabler
-    # - path: github.com/hugomods/icons/vendors/feather
-
-    # blog comments engine
-    - path: github.com/hbstack/blog/modules/giscus # (upstream default)
-    # - path: github.com/hbstack/blog/modules/disqus
-    # - path: github.com/hbstack/blog/modules/utterances
-
-    # blog table of contents scrollspy
-    - path: github.com/hbstack/blog/modules/toc-scrollspy
-
-    # blog content panel
-    - path: github.com/hbstack/blog/modules/content-panel
-
-    # docs comments engine
-    - path: github.com/hbstack/docs/modules/giscus # (upstream default)
-    # - path: github.com/hbstack/docs/modules/utterances
-    # - path: github.com/hbstack/docs/modules/disqus
-
-    # docs table of contents scrollspy
-    - path: github.com/hbstack/docs/modules/toc-scrollspy
-
-    # docs content panel
-    - path: github.com/hbstack/docs/modules/content-panel
-
-    # other modules
-    # - path: github.com/hugomods/google-analytics
-    - path: github.com/hugomods/google-adsense
-
-    # recommended modules
-    # check which modules were imported by recommended module by "hugo mod graph | grep recommended".
-    # see also https://hbstack.dev/en/docs/modules/meta/.
-    # to remove unused modules, you need to replace the recommended module with modules your need.
-    - path: github.com/hbstack/meta/recommended
-
 outputs:
   home:
     - HTML
-    - Offline        # required by PWA module for displaying the offline pages.
+    - Offline # required by PWA module for displaying the offline pages.
     - RSS
-    - SearchIndex    # required by search module.
+    - SearchIndex # required by search module.
     - WebAppManifest # required by PWA module to make your site installable.
 
 rssLimit: 9
 
 taxonomies:
-  authors: authors       # multiple authors.
+  authors: authors # multiple authors.
   tags: tags
   categories: categories
   series: series
diff --git a/config/_default/module.yaml b/config/_default/module.yaml
new file mode 100644
index 0000000..31c4ff3
--- /dev/null
+++ b/config/_default/module.yaml
@@ -0,0 +1,34 @@
+imports:
+  # gallery modules.
+  - path: github.com/hbstack/gallery
+  - path: github.com/hbstack/gallery/modules/breadcrumb
+
+  # syntax highlighting, see https://hbstack.dev/en/docs/modules/syntax-highlighting/.
+  # - path: github.com/hbstack/syntax-highlighting/styles/github-dark
+
+  # icons modules
+  - path: github.com/hugomods/icons/vendors/font-awesome
+  # - path: github.com/hugomods/icons/vendors/mdi
+  # - path: github.com/hugomods/icons/vendors/simple-icons
+  # - path: github.com/hugomods/icons/vendors/tabler
+  # - path: github.com/hugomods/icons/vendors/feather
+
+  # blog table of contents scrollspy
+  - path: github.com/hbstack/blog/modules/toc-scrollspy
+
+  # blog content panel
+  - path: github.com/hbstack/blog/modules/content-panel
+
+  # docs comments engine
+  - path: github.com/hbstack/docs/modules/giscus # (upstream default)
+  # - path: github.com/hbstack/docs/modules/utterances
+  # - path: github.com/hbstack/docs/modules/disqus
+
+  # - path: github.com/hugomods/google-analytics
+  - path: github.com/hugomods/google-adsense
+
+  # recommended modules
+  # check which modules were imported by recommended module by "hugo mod graph | grep recommended".
+  # see also https://hbstack.dev/en/docs/modules/meta/.
+  # to remove unused modules, you need to replace the recommended module with modules your need.
+  - path: github.com/hbstack/meta/recommended