diff --git a/_config.butterfly.yml b/_config.butterfly.yml
index 2243b63..746f805 100644
--- a/_config.butterfly.yml
+++ b/_config.butterfly.yml
@@ -570,7 +570,7 @@ busuanzi:
 math:
   # Choose: mathjax, katex
   # Leave it empty if you don't need math
-  use:
+  use: mathjax
   per_page: true
   hide_scrollbar: false
 
diff --git a/_config.yml b/_config.yml
index f7491bb..3081f4b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -69,13 +69,13 @@ index_generator:
 default_category: uncategorized
 category_map:
   建站手札: website
-  学习: learning
-  编程: program
+  学习: learning  
   随笔: essay
 tag_map:
   网站: web 
   生活: life
   英语: english
+  编程: program
 
 # Metadata elements
 ## https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta
@@ -211,8 +211,6 @@ aisummary:
 
   # 内容清洗设置
   ignoreRules:              # 可选：自定义内容清洗的正则规则
-    # - "\\{%.*?%\\}"
-    # - "!\\[.*?\\]\\(.*?\\)"
   
   max_token: 5000           # 输入内容最大 token 长度（非输出限制）
   concurrency: 2            # 并发处理数，建议不高于 5hexo s
diff --git a/scaffolds/post.md b/scaffolds/post.md
index 1f9b9a4..03325e1 100644
--- a/scaffolds/post.md
+++ b/scaffolds/post.md
@@ -1,5 +1,7 @@
 ---
 title: {{ title }}
 date: {{ date }}
+categories:
+series: 
 tags:
 ---
diff --git a/source/_posts/c-first-in-first.md b/source/_posts/c-first-in-first.md
new file mode 100644
index 0000000..abc03df
--- /dev/null
+++ b/source/_posts/c-first-in-first.md
@@ -0,0 +1,33 @@
+---
+title: C# 入门
+categories: 学习
+tags: C#
+abbrlink: bc56f789
+date: 2025-08-15 09:56:17
+---
+今天开始学习C#
+# 环境安装
+下载Visual Studio,社区版就可以
+{% link Visual Studio,Visual Studio,https://visualstudio.microsoft.com/zh-hans/downloads/ %}
+下载的是安装器选择.Net桌面开发，注意修改安装位置
+<center><img src="https://pic.biss.click/i/2025/08/15/776813.webp" alt=".Net 桌面开发"></center>
+
+# 第一个程序
+```c#
+using System;
+namespace HelloWorldApplication
+{
+    /* 类名为 HelloWorld */
+    class HelloWorld
+    {
+        /* main函数 */
+        static void Main(string[] args)
+        {
+            /* 我的第一个 C# 程序 */
+            Console.WriteLine("Hello World!");
+            Console.ReadKey();
+        }
+    }
+}
+```
+这也是一个默认的格式
\ No newline at end of file