diff --git a/CrossDown/Core.py b/CrossDown/Core.py
index 920714f..7301ec9 100644
--- a/CrossDown/Core.py
+++ b/CrossDown/Core.py
@@ -283,7 +283,7 @@ class Box(Extension):
         # 红框警告
         md.inlinePatterns.register(ID(
             r'!{3}(.+?)!{3}', tag='div', property_='style', value='display: inline-block; border: 1px solid red;'
-        ), 'warning_in_line', 0)  # 行内
+        ), 'warning_in_line', 20)  # 行内
         md.parser.blockprocessors.register(BoxBlock(
             md.parser, r'^ *!{3} *\n', r'\n *!{3}\s*$', 'display: inline-block; border: 1px solid red;'
         ), 'warning_box', 175)  # 块
@@ -291,7 +291,7 @@ class Box(Extension):
         # 黄框提醒
         md.inlinePatterns.register(ID(
             r'!-!(.+?)!-!', tag='div', property_='style', value='display: inline-block; border: 1px solid yellow;'
-        ), 'reminding_in_line', 1)  # 行内
+        ), 'reminding_in_line', 21)  # 行内
         md.parser.blockprocessors.register(BoxBlock(
             md.parser, r'^ *!-! *\n', r'\n *!-!\s*$', 'display: inline-block; border: 1px solid yellow;'
         ), 'reminding_box', 176)  # 块
@@ -299,7 +299,7 @@ class Box(Extension):
         # 绿框安心
         md.inlinePatterns.register(ID(
             r',{3}(.+?),{3}', tag='div', property_='style', value='display: inline-block; border: 1px solid green;'
-        ), 'reminding_in_line', 2)  # 行内
+        ), 'reminding_in_line', 22)  # 行内
         md.parser.blockprocessors.register(BoxBlock(
             md.parser, r'^ *,{3} *\n', r'\n *,{3}\s*$', 'display: inline-block; border: 1px solid green;'
         ), 'reminding_box', 177)  # 块
@@ -307,7 +307,7 @@ class Box(Extension):
         # 蓝框怀疑
         md.inlinePatterns.register(ID(
             r',-,(.+?),{2}', tag='div', property_='style', value='display: inline-block; border: 1px solid blue;'
-        ), 'reminding_in_line', 3)  # 行内
+        ), 'reminding_in_line', 23)  # 行内
         md.parser.blockprocessors.register(BoxBlock(
             md.parser, r'^ *,-, *\n', r'\n *,-,\s*$', 'display: inline-block; border: 1px solid blue;'
         ), 'reminding_box', 178)  # 块
diff --git a/README.html b/README.html
index 97eb51c..527208b 100644
--- a/README.html
+++ b/README.html
@@ -85,6 +85,7 @@
     <li><a href="#4.2.1">4.2.1 YAML</a></li>
     <li><a href="#4.2.2">4.2.2 Python</a></li>
     <li><a href="#4.2.3">4.2.3 Mermaid</a></li>
+    <li><a href="#4.2.4">4.2.4 shell</a></li>
     </ul>
     </li>
     </ul>
@@ -196,7 +197,8 @@
     </code></pre></div>
     
     <h3 id="4.2.2">4.2.2 Python</h3>
-    <div class="codehilite"><pre><span></span><code class="python"><span class="nb">print</span><span class="p">(</span><span class="s1">&#39;CrossDown&#39;</span><span class="p">)</span>
+    <div class="codehilite"><pre><span></span><code class="python"><span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
+        <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;CrossDown&#39;</span><span class="p">)</span>
     </code></pre></div>
     
     <h3 id="4.2.3">4.2.3 Mermaid</h3>
@@ -207,6 +209,10 @@
         C--&gt;|结果2|E[结束2]
     </code></pre></div>
     
+    <h3 id="4.2.4">4.2.4 shell</h3>
+    <div class="codehilite"><pre><span></span><code class="shell"><span class="nb">cd</span><span class="w"> </span>../..
+    </code></pre></div>
+    
     <h1 id="5">5 转义</h1>
     <p>\ </p>
     <p>\a </p>
diff --git a/README.md b/README.md
index f549196..ae56c45 100644
--- a/README.md
+++ b/README.md
@@ -131,7 +131,8 @@ B:
 4.2.2 Python
 
 ```python
-print('CrossDown')
+def main():
+    print('CrossDown')
 ```
 
 4.2.3 Mermaid
@@ -144,6 +145,12 @@ graph TD
     C-->|结果2|E[结束2]
 ```
 
+4.2.4 shell
+
+```shell
+cd ../..
+```
+
 5 转义
 
 \\ 
diff --git a/requirement.txt b/requirement.txt
index cb36c56..c23cca1 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -1,3 +1,4 @@
 Markdown>=3.7
 matplotlib>=3.9.2
-numpy>=2.1.1
\ No newline at end of file
+numpy>=2.1.1
+pygments>=2.18.0
\ No newline at end of file