diff --git a/docs/big-data/README.md b/docs/big-data/README.md
index fb8e8f7..f49cc4e 100644
--- a/docs/big-data/README.md
+++ b/docs/big-data/README.md
@@ -21,13 +21,13 @@
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -36,4 +36,4 @@
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
\ No newline at end of file
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
\ No newline at end of file
diff --git a/docs/distributed-system/README.md b/docs/distributed-system/README.md
index 0b5f672..5a2a547 100644
--- a/docs/distributed-system/README.md
+++ b/docs/distributed-system/README.md
@@ -41,13 +41,13 @@
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -56,4 +56,4 @@
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
diff --git a/docs/extra-page/README.md b/docs/extra-page/README.md
index 240f0dc..6ccbf6f 100644
--- a/docs/extra-page/README.md
+++ b/docs/extra-page/README.md
@@ -25,13 +25,13 @@
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -40,4 +40,4 @@
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
\ No newline at end of file
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
\ No newline at end of file
diff --git a/docs/extra-page/subscriptions-for-doocs.md b/docs/extra-page/subscriptions-for-doocs.md
index 7b8439a..9d30883 100644
--- a/docs/extra-page/subscriptions-for-doocs.md
+++ b/docs/extra-page/subscriptions-for-doocs.md
@@ -3,7 +3,7 @@
 GitHub 开源社区 Doocs 旗下唯一公众号“**Doocs 开源社区**”，专注于挖掘 IT 技术知识，助力开发者成长。
 
 <div style="text-align:center; ">
-  <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 200px;"><br>
+  <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 200px;"><br>
 </div>
 
 来成为公众号的首批粉丝吗？一定不会辜负你们的期待。
diff --git a/docs/high-availability/README.md b/docs/high-availability/README.md
index 96fbbd0..8c1d557 100644
--- a/docs/high-availability/README.md
+++ b/docs/high-availability/README.md
@@ -40,13 +40,13 @@
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -55,4 +55,4 @@
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
diff --git a/docs/high-concurrency/README.md b/docs/high-concurrency/README.md
index 8581dc5..f4a6dcd 100644
--- a/docs/high-concurrency/README.md
+++ b/docs/high-concurrency/README.md
@@ -57,13 +57,13 @@ GitHub 技术社区 [Doocs](https://github.com/doocs) 旗下唯一公众号「**
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -72,4 +72,4 @@ GitHub 技术社区 [Doocs](https://github.com/doocs) 旗下唯一公众号「**
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
diff --git a/docs/micro-services/README.md b/docs/micro-services/README.md
index 4e36b8e..96be93c 100644
--- a/docs/micro-services/README.md
+++ b/docs/micro-services/README.md
@@ -30,13 +30,13 @@
   <tr>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/doocs">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-doocs.jpg" style="width: 400px;"><br>
         <sub>公众平台</sub>
       </a><br>
     </td>
     <td align="center" style="width: 200px;">
       <a href="https://github.com/yanglbme">
-        <img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
+        <img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/qrcode-for-yanglbme.jpg" style="width: 400px;"><br>
         <sub>个人微信</sub>
       </a><br>
     </td>
@@ -45,4 +45,4 @@
 
 关注「**Doocs 开源社区**」公众号，回复 **PDF**，即可获取本项目离线 PDF 文档（283 页精华），学习更加方便！
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
+<img src="https://fastly.jsdelivr.net/gh/doocs/advanced-java@main/images/pdf.png" style="width: 600px;"><br>
diff --git a/index.html b/index.html
index 43779c1..91188da 100644
--- a/index.html
+++ b/index.html
@@ -9,8 +9,8 @@
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     content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" />
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-  <link rel="stylesheet" href="//unpkg.com/docsify-darklight-theme@latest/dist/style.min.css">
+  <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/docsify/lib/themes/vue.css" />
+  <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/docsify-darklight-theme@latest/dist/style.min.css">
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@@ -161,15 +161,22 @@
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+  <script src="//fastly.jsdelivr.net/npm/docsify/lib/docsify.min.js"></script>
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