doc: center

README.md

@@ -1,8 +1,10 @@
+<div align="center">
+
 English | [简体中文](README_zh-CN.md)
 
 # PDFMathTranslate
 
-<p align="center">
+<p>
   <!-- PyPI -->
   <a href="https://pypi.org/project/pdf2zh/">
     <img src="https://img.shields.io/pypi/v/pdf2zh"/></a>
@@ -13,6 +15,8 @@ English | [简体中文](README_zh-CN.md)
     <img src="https://img.shields.io/badge/Telegram-2CA5E0?style=flat-squeare&logo=telegram&logoColor=white"/></a>
 </p>
 
+</div>
+
 PDF scientific paper translation and bilingual comparison.
 
 - 📊 Retain formulas and charts.

README_zh-CN.md

@@ -1,8 +1,10 @@
+<div align="center">
+
 [English](README.md) | 简体中文
 
 # PDFMathTranslate
 
-<p align="center">
+<p>
   <!-- PyPI -->
   <a href="https://pypi.org/project/pdf2zh/">
     <img src="https://img.shields.io/pypi/v/pdf2zh"/></a>
@@ -13,6 +15,8 @@
     <img src="https://img.shields.io/badge/Telegram-2CA5E0?style=flat-squeare&logo=telegram&logoColor=white"/></a>
 </p>
 
+</div>
+
 PDF 文档翻译及双语对照
 
 - 📊 保留公式和图表