docs: center align logos and update badges in README

Author: phguo

README.md

@@ -1,4 +1,17 @@
-![benderslib.png](https://raw.githubusercontent.com/phguo/BendersLib/397a53a490f2bbee0cccb3af39d4ee4e9d567301/docs/source/_static/benderslib.png)
+<div align="center">
+
+![BendersLib Logo](https://raw.githubusercontent.com/phguo/BendersLib/397a53a490f2bbee0cccb3af39d4ee4e9d567301/docs/source/_static/benderslib.png)
+
+[![GitHub Commits](https://img.shields.io/github/last-commit/phguo/benderslib?style=flat-square&logo=github)](https://github.com/phguo/BendersLib)
+[![Codecov](https://img.shields.io/codecov/c/github/phguo/benderslib?style=flat-square&logo=codecov)](https://codecov.io/gh/phguo/BendersLib)
+[![Read the Docs](https://img.shields.io/readthedocs/benderslib?style=flat-square&logo=readthedocs)](https://benders.dev)
+[![PyPI](https://img.shields.io/pypi/v/benderslib.svg?style=flat-square&logo=pypi)](https://pypi.org/project/benderslib/)
+
+[![Python Versions](https://img.shields.io/pypi/pyversions/benderslib?style=flat-square&logo=python)](https://pypi.org/project/benderslib/)
+
+</div>
+
+---
 
 # BendersLib: A Benders Decomposition Library in Python
 
@@ -10,20 +23,17 @@ variants, including
 **L-shaped Method** [<sup>[4]</sup>](#4), 
 **Integer L-shaped Method** [<sup>[5]</sup>](#5), 
 and **Logic-based Benders Decomposition** [<sup>[6]</sup>](#6). 
+
 While BendersLib provides built-in implementations of 
 these methods, it is designed to be extensible. Users can implement custom Benders 
 decomposition methods by customizing **subproblem solvers** and **cut generators**, 
-and defining **callback functions** for enhancement strategies. BendersLib is solver 
+and defining **callback functions** for enhancement strategies. 
+
+BendersLib is solver 
 agnostic and has built-in interfaces for popular Mathematical Programming and Constraint 
 Programming solvers. Its support for rapid prototyping and high extensibility are designed 
 to meet the needs of both researchers and practitioners in Operations Research and related fields.
 
-[![GitHub last commit](https://img.shields.io/github/last-commit/phguo/benderslib)](https://github.com/phguo/BendersLib)
-[![codecov](https://codecov.io/gh/phguo/BendersLib/branch/develop/graph/badge.svg)](https://codecov.io/gh/phguo/BendersLib)
-[![PyPI version](https://img.shields.io/pypi/v/benderslib.svg)](https://pypi.org/project/benderslib/)
-[![Documentation Status](https://readthedocs.org/projects/benderslib/badge/?version=latest)](https://benders.dev)
-![PyPI - Python Version](https://img.shields.io/pypi/pyversions/benderslib)
-
 ## Quick Start
 
 Install BendersLib and a solver of your choice (e.g., Gurobi) using pip.

docs/source/about.rst

@@ -33,6 +33,7 @@ Contributors
 BendersLib was created by **Peng-Hui Guo** ("郭鹏辉" in Chinese, https://guo.ph),
 who holds a PhD in Management Science and Engineering
 from Nanjing University of Aeronautics and Astronautics (NUAA), China.
+
 Before developing BendersLib, Peng-Hui Guo had published research papers
 on Benders decomposition in journals such as *Naval Research Logistics*,
 *IISE Transactions*, and *European Journal of Operational Research*. His PhD thesis, titled
@@ -86,11 +87,11 @@ Logo
 .. rubric:: Logo (horizontal)
 
 .. image:: _static/benderslib.png
-   :align: left
+   :align: center
 
 .. rubric:: Logo (vertical)
 
 .. image:: _static/benderslib_v.png
-   :align: left
+   :align: center
    :height: 350px
    :width: 350px