这是我目前在 main.tex 文件中的内容：
\documentclass[12pt]{report}
\usepackage[a4paper,width=160mm,top=25mm,bottom=25mm]{geometry}
\usepackage{fontspec}
\setmainfont{Arial}
\pagestyle{plain}
\frenchspacing
\usepackage{graphicx}
%\graphicspath{{C:/Users/deepw/Desktop/university/tfg/images/}}
\usepackage[style=authoryear,sorting=none]{biblatex}
%\addbibresource{references.bib}
\usepackage{lipsum}
\usepackage[spanish]{babel}
\title{Thesis Title}
\author{Author Name}
\date{Day Month Year}
\begin{document}
\input{titlepage}
\input{abstract}
\chapter*{Dedication}
To mum and dad
\chapter*{Declaration}
I declare that..
\chapter*{Acknowledgments}
I want to thank...
\tableofcontents
\listoffigures
\listoftables
\chapter{Introduction}
\input{introduction}
\chapter{Chapter Two Title}
\input{chapter02}
\chapter{Chapter Three Title}
\input{chapter03}
\chapter{Chapter Four Title}
\input{chapter04}
\chapter{Conclusion}
\input{conclusion}
\appendix
\chapter{Appendix Title}
\input{appendix}
%\printbibliography
\end{document}
...我的标题页如下所示：
\begin{titlepage}
\begin{center}
\vspace*{10mm}
\huge
\textbf{Thesis Title}
\vspace{5mm}
\LARGE
Thesis Subtitle
\vspace{15mm}
\textbf{Author Name}
\vfill
Trabajo de fin de grado...
\vspace{8mm}
%\includegraphics[width=0.3\textwidth]{ceulogo.jpg}
\vspace{8mm}
\Large
Department Name\\
University Name\\
Country\\
Date
\end{center}
\end{titlepage}
诸如 \large、\huge 等命令可以很容易地调整所有内容的大小，但我不知道如何将其应用于章节、节和小节。
提前致谢！