Xelatex 章节、章节、小节标题的字体更改

因此，我正在努力改变latex中标题/章节/小节的字体

这是我的密码：

% !TEX TS?program = pdflatexmk

\documentclass[fontsize=12pt]{book}

\usepackage[T1]{fontenc}

\usepackage{amsmath}

\usepackage{mathpazo}

%changing font of section/chapter title
\usepackage{fontspec}
\usepackage{titlesec}
\newfontfamily\headingfont{Papyrus}
\titleformat{\chapter}{\LARGE\headingfont}
\titleformat{\section}{\LARGE\headingfont}
\titleformat{\subsection}{\Large\headingfont}
\titleformat{\subsubsection}{\large\headingfont}



\title{my report}
\author{user name}
\date


\linespread{1.5}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\maketitle
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\tableofcontents
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\chapter{introduction}
text : intro
\section{first section}
text :  section
\subsection{this subsection}
text :section
\subsubsection{this and that subsection}
text :subsub
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\end{document}

这是输出： 字体仅在

章节

和

小节

中使用。不适合其他人。 而且编号也丢失了。例如，如果没有

titlesec

和

fontspec

这就是它的外观。章节和小节编号随此丢失。 我找不到虫子。（使用fontspec也有点烦人，因为它找不到默认的latex字体，所以必须复制粘贴工作目录中的

otf

文件）