diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index b1c4378..1e86da0 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -1,3 +1,5 @@
+# Build and deploy Hexo site to GitHub Pages (replaces legacy deploy.yml).
+# Uses actions/checkout@v4 and actions/setup-node@v4 (npm cache via setup-node; no separate actions/cache step).
 name: Build and deploy Pages
 
 on:
diff --git a/.gitignore b/.gitignore
index ee8b207..957e8b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@ node_modules/
 public/
 .deploy*/
 _multiconfig.yml
+_config.butterfly.local.yml
 .agents/
\ No newline at end of file
diff --git a/_config.butterfly.yml b/_config.butterfly.yml
index 1922f51..3080fb7 100644
--- a/_config.butterfly.yml
+++ b/_config.butterfly.yml
@@ -410,9 +410,9 @@ addtoany:
 
 comments:
   # Up to two comments system, the first will be shown as default
-  # Leave it empty if you don't need comments.
-  # Choose: Disqus/Disqusjs/Livere/Gitalk/Valine/Waline/Utterances/Facebook Comments/Twikoo/Giscus/Remark42/Artalk
-  use:
+  # Choose: Disqus/Disqusjs/Livere/Valine/Waline/Utterances/Facebook Comments/Twikoo/Giscus/Remark42/Artalk
+  # Migrated from Gitalk (OAuth secrets must never be committed — use env or untracked _config.butterfly.local.yml).
+  use: Giscus
   text: true # Display the comment name next to the button
   # lazyload: The comment system will be load when comment element enters the browser's viewport.
   # If you set it to true, the comment count will be invalid
@@ -439,16 +439,6 @@ disqusjs:
 livere:
   uid:
 
-# gitalk
-# https://github.com/gitalk/gitalk
-gitalk:
-  client_id:
-  client_secret:
-  repo:
-  owner:
-  admin:
-  option:
-
 # valine
 # https://valine.js.org
 valine:
@@ -495,16 +485,21 @@ twikoo:
   visitor: false
   option:
 
-# Giscus
-# https://giscus.app/
+# Giscus (GitHub Discussions–based comments; replaces Gitalk)
+# Setup: https://giscus.app/ — enable Discussions, install the giscus GitHub App, create a category, then paste repo_id and category_id below.
+# Never commit OAuth client secrets; Giscus only needs public repo/category IDs.
 giscus:
-  repo:
-  repo_id:
-  category_id:
-  theme:
-    light: light
-    dark: dark
+  repo: Shirolin/Shirolin.github.io
+  repo_id: R_kgDOJ7cwrQ
+  category_id: DIC_kwDOJ7cwrc4DFWWs
+  light_theme: light
+  dark_theme: dark
   option:
+    data-lang: zh-CN
+    data-mapping: pathname
+    data-strict: '0'
+    data-input-position: bottom
+    data-category: Announcements
 
 # Remark42
 # https://remark42.com/docs/configuration/frontend/