diff --git a/CrossDown.py b/CrossDown.py
index e79da3e..0f424b8 100644
--- a/CrossDown.py
+++ b/CrossDown.py
@@ -22,6 +22,7 @@ class Style:
     """
     渲染字体样式
     """
+
     def __init__(self, text: str):
         """
         初始化
@@ -34,35 +35,35 @@ class Style:
         斜体
         :return:
         """
-        self.text = re.sub(r'\*([^*\n]+)\*', r'<i>\1</i>\n', self.text)
+        self.text = re.sub(r'\*([^*\n]+)\*', r'<i>\1</i>', self.text)
 
     def bold(self):
         """
         粗体
         :return:
         """
-        self.text = re.sub(r'\*\*([^*\n]+)\*\*', r'<b>\1</b>\n', self.text)
+        self.text = re.sub(r'\*\*([^*\n]+)\*\*', r'<b>\1</b>', self.text)
 
     def underline(self):
         """
         下划线
         :return:
         """
-        self.text = re.sub(r'~([^~\n]+)~', r'<u>\1</u>\n', self.text)
+        self.text = re.sub(r'~([^~\n]+)~', r'<u>\1</u>', self.text)
 
     def strikethrough(self):
         """
         删除线
         :return:
         """
-        self.text = re.sub(r'~~([^~\n]+)~~', r'<s>\1</s>\n', self.text)
+        self.text = re.sub(r'~~([^~\n]+)~~', r'<s>\1</s>', self.text)
 
     def highlight(self):
         """
         高亮
         :return:
         """
-        self.text = re.sub(r'==([^=\n]+)==', r'<mark>\1</mark>\n', self.text)
+        self.text = re.sub(r'==([^=\n]+)==', r'<mark>\1</mark>', self.text)
 
     def __call__(self, *args, **kwargs):
         """
@@ -92,7 +93,7 @@ class Function:
         self.text = text
 
     def link(self):
-        self.text = re.sub(r'\[([^\[\]\n]+)]\(([^()\n]+)\)', r'<a href="\2">\1</a>\n', self.text)
+        self.text = re.sub(r'\[([^\[\]\n]+)]\(([^()\n]+)\)', r'<a href="\2">\1</a>', self.text)
 
     def __call__(self, *args, **kwargs):
         """
@@ -105,23 +106,96 @@ class Function:
         return self.text
 
 
+class Value:
+    def __init__(self, text: str):
+        self.text = text
+        self.values = {
+            key: value for key, value in re.findall(r'\[([^]]+)]: (.+?)(?=\n|$)', text)
+        }  # 从text中提取所有变量并转换成字典
+
+    def __call__(self, *args, **kwargs):
+        """
+        将所有变量赋值并移除变量定义
+        :param args:
+        :param kwargs:
+        :return: 赋值后的正文
+        """
+        text = self.text
+        for k, v in self.values.items():
+            text = re.sub(fr'\[([^]]+)]\({k}\)', fr'[\1]({v})', text)
+            text = re.sub(fr'\[{k}]: (.+?)(?=\n|$)', '', text)
+        return text
+
+
+class CodeBlock:
+    def __init__(self, text: str):
+        self.text = text
+        self.codes = [i for i in re.findall('`([^`]*)`', self.text) if i != '']
+        print(self.codes)
+
+    def __call__(self, *args, **kwargs):
+        return re.sub(r'`[^`]*`', '', self.text)
+
+
 class Basic:
-    @ staticmethod
-    def paragraph(text):
+    @staticmethod
+    def paragraph(text: str):
         return re.sub(r'(.*?)\n', r'<p>\1</p>\n', text)
 
 
-def main(text: str) -> str:
+def add_indent_to_string(input_string: str, indent_spaces: int = 4):
+    """
+    给字符串中的每一行前面加上缩进。
+    :param input_string: 原始字符串，可以包含多行。
+    :param indent_spaces: 每行前面要添加的空格数，默认为4。
+
+    :return: 带缩进的新字符串。
+    """
+    # 使用字符串的splitlines()方法分割原始字符串为行列表
+    lines = input_string.splitlines()
+
+    # 遍历行列表，给每行前面加上相应的缩进，并重新组合成字符串
+    indented_string = "\n".join(f"{' ' * indent_spaces}{line}" for line in lines)
+
+    return indented_string
+
+
+def body(text: str) -> str:
+    """
+    渲染正文部分
+    :param text: 输入正文
+    :return: 输出渲染后的正文
+    """
+    text = Value(text)()  # 提取变量并赋值到文本中
     text = Header.header(text)  # 渲染标题
-    text = Style(text)()
-    text = Function(text)()
+    text = Style(text)()  # 渲染字体样式
+    text = Function(text)()  # 渲染特殊功能
 
     # text = Basic.paragraph(text)  # 渲染段落
     return text
 
 
+def main(origen: str):
+    # 预处理
+    text = CodeBlock(origen)()
+    return body(text)  # 处理正文
+    #
+
+
 if __name__ == '__main__':
     with open('test.md', encoding='utf-8') as test:
         cd = main(test.read())
     with open('test.html', 'w', encoding='utf-8') as html:
-        html.write(cd)
+        html.write(f"""<!DOCTYPE html>  
+<html lang="zh-CN">  
+<head>  
+    <meta charset="UTF-8">  
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">  
+    <title>UTF-8编码示例</title>  
+    <!-- 可以在这里添加其他元数据和CSS链接 -->  
+</head>  
+<body>  
+    {add_indent_to_string(cd, 4)}
+</body>  
+</html>
+        """)