diff --git a/docs/index.md b/docs/index.md
index 23a0a0f..d83b5ff 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -12,7 +12,7 @@ hide:
 ---
 
 <div class="grid" markdown>
-<figure style="margin: 0" markdown>
+<figure style="margin: 0 auto" markdown>
   ![](assets/images/brand/light/2.png#only-light){ width="300" }
   ![](assets/images/brand/dark/2.png#only-dark){ width="300" }
   <figcaption>GNU/Linux 更换系统软件源脚本及 Docker 安装脚本</figcaption>
diff --git a/mkdocs.yml b/mkdocs.yml
index 69e6487..6476657 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -31,19 +31,16 @@ theme:
       example: octicons/beaker-16
       quote: octicons/quote-16
   palette:
-    # Palette toggle for automatic mode
     - media: "(prefers-color-scheme)"
       toggle:
         icon: material/brightness-auto
         name: 跟随系统
-    # Palette toggle for light mode
     - media: "(prefers-color-scheme: light)"
       scheme: default
       primary: white
       toggle:
         icon: octicons/sun-16
         name: 亮色模式
-    # Palette toggle for dark mode
     - media: "(prefers-color-scheme: dark)"
       scheme: slate
       primary: black