感谢不同的线程和 tex.stackexchange 的帮助，我找到了目录和文本标题的令人满意的格式。但我不明白 titlesec 和 titletoc 之间的协同逻辑。我希望有：
1.目录：
2.用于正文标题
但是，将这两个代码简单合并会产生不理想的结果。Titlesec 和 titletoc 相互影响。这是全局代码：
\documentclass[a4paper]{report}
\usepackage{fontspec}
\usepackage{polyglossia}
\setmainfont[Ligatures=TeX,Numbers=OldStyle]{EB Garamond}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\frenchspacing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{titlesec,titletoc,etoc}
%%% TABLE OF CONTENTS
\titlecontents{chapter}
[3em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel\phantom{.}]{3em}\enspace}
{\hspace*{0.5em}}
{}
[]
\titlecontents{section}
[3em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{}
{\hfill\llap{\makebox[\dimexpr\linewidth-1.3pc][l]{\thecontentspage}}}
[]
\titlecontents*{subsection}
[3.525em]
{\footnotesize}
{}
{}
{,~\thecontentspage}
[~--~]
[]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% BODY OF TEXT TITLES
\titleformat{\chapter}[display]
{\normalfont\fontsize{11}{12}\selectfont}
{\scshape\thechapter}
{0pt}
{}
\titleformat{\section}
{\normalfont\fontsize{11}{12}\selectfont}
{\thesection}
{1em}
{}
\titleformat{\subsection}
{\filleft\normalfont\fontsize{11}{12}\selectfont\itshape}
{}
{1em}
{}
\titlespacing{\chapter}
{0pt}{0pt}{3cm}
\makeatletter
\etocsetstyle{chapter}
{\@afterindenttrue}
{\addvspace{2ex}\leavevmode\leftskip 0cm\relax}
{\ifShowPage % conditional deciding the display or not of the page number
\llap{\makebox[1.5cm][r]{\mdseries\etocpage}\hspace{.5cm}}%
\fi
\normalsize\makebox[1cm][r]{\etocnumber\phantom{.}}\hspace{10pt}%
\parbox[t]{\dimexpr\linewidth-1cm-27pt\relax}{\etocname\par}\hfill\par
}
{}
\makeatother
\etocsetstyle{section}
{}
{\leavevmode\leftskip 0cm\relax}
{\llap{\makebox[1.5cm][r]{\mdseries\etocpage}\hspace{.5cm}}%
\normalsize\makebox[1cm][r]{\etocnumber.}\hspace{10pt}%
\parbox[t]{\dimexpr\linewidth-1cm-27pt\relax}{\etocname\par}\hfill\par
}
{}
\newif\ifShowPage
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\renewcommand{\thechapter}{\scshape\roman{chapter}}
\renewcommand{\thesection}{\arabic{section}.}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\tableofcontents
\chapter{A Very Short History of Rhetoric}
\section{The Greek World}
\subsection{Aristoteles}
\subsection{The hellenistic Age}
\subsection{The Latin World}
\subsection{Aristoteles}
\subsection{The hellenistic Age}
\subsection{The Latin World}
\subsection{Aristoteles}
\subsection{The hellenistic Age}
\subsection{The Latin World}
\subsection{Aristoteles}
\subsection{The hellenistic Age}
\subsection{The Latin World}
\end{document}
这两个部分在不同的文件中运行良好，但放在一起就很糟糕了。显然我无法让它们共存……
升级
按照你的建议，我尝试了一个没有 的新代码etoc。它似乎运行良好，除了一个奇怪的小细节：
\documentclass[a4paper]{report}
\usepackage{fontspec}
\usepackage{polyglossia}
\setmainfont[Ligatures=TeX,Numbers=OldStyle]{EB Garamond}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\frenchspacing
\usepackage{lipsum}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{titletoc}
\titlecontents{chapter}
[3em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel\phantom{.}]{3em}\enspace}
{\hspace*{0.5em}}
{}
[]
\titlecontents{section}
[3em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel\phantom{.}]{3em}\enspace}
{}
{\hfill\llap{\makebox[\dimexpr\linewidth-1.3pc][l]{\thecontentspage}}}
[]
\titlecontents*{subsection}
[3.525em]
{\footnotesize}
{}
{}
{,~\thecontentspage}
[~--~]
[]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{titlesec}
\titleformat{\chapter}[display]
{\normalfont\fontsize{11pt}{12pt}\selectfont}{\thechapter}{0pt}{}
\renewcommand\thesection{\arabic{section}}
\titleformat{\section}
{\normalfont\fontsize{11pt}{12pt}\selectfont}{\thesection}{1em}{}
\titleformat{\subsection}
{\normalfont\fontsize{11pt}{12pt}\selectfont\itshape}{\phantom{\thesection}}{1em}{}
\titlespacing{\chapter}{0pt}{0pt}{3cm}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\renewcommand{\thechapter}{\scshape\roman{chapter}}
\renewcommand{\thesection}{\arabic{chapter}.\arabic{section}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\tableofcontents
\chapter{A Very Short History of Rhetoric}
\section{The Greek World}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\subsection{Aristoteles}
\lipsum[1]
\section{The Greek World}
\subsection{Aristoteles}
\lipsum[1]
\chapter{A Very Short History of Rhetoric}
\section{The Greek World}
\subsection{Aristoteles}
\lipsum[1]
\section{The Greek World}
\subsection{Aristoteles}
\lipsum[1]
\chapter{A Very Short History of Rhetoric}
\section{The Greek World}
\subsection{Aristoteles}
\lipsum[1]
\section{The Greek World}
\subsection{Aristoteles}
\lipsum[1]
\subsection{The hellenistic Age}
\lipsum[1]
\subsection{The Latin World}
\lipsum[1]
\end{document}
标题完全对齐，但章节和节数却不对齐。如何才能将它们全部右对齐？