我创建了一个如下所示的目录：
但我希望章节编号（罗马字母）和章节标题能够按如下所示对齐：
我正在做以下事情：
\documentclass[10pt,largepost]{octavo}%
\usepackage{titlesec, tocloft}
\titleformat{\chapter}[display]
{\centering\normalfont\large\scshape}{}{18pt}{\large}
\titlespacing*{\chapter}{0pt}{0pt}{40pt}
\titleformat{\part}[display]
{\normalfont\Large\filcenter\scshape\bfseries}
{\thepart}{18pt}{\large}
\titlespacing*{\part}{0pt}{50pt}{40pt}
\begin{document}
\tableofcontents
\part{Book One}
\chapter[I \emph{Maecenas atavis}]{\textsc{i}\\maecenas atavis}
\chapter[II \emph{Jam satis}]{\textsc{ii}\\jam satis}
\chapter[III \emph{Sic te diva}]{\textsc{iii}\\sic te diva}
\chapter[IV \emph{Solvitur acris hiems}]{\textsc{iv}\\solvitur acris hiems}
\end{document}
答案1
\documentclass[10pt,largepost]{octavo}
\usepackage[T1]{fontenc}
\usepackage{titlesec,tocloft}
\titleformat{\chapter}[display]
{\centering\normalfont\large\scshape}{\thechapter}{18pt}{\large}
\titlespacing*{\chapter}{0pt}{0pt}{40pt}
\titleformat{\part}[display]
{\normalfont\Large\filcenter\scshape\bfseries}
{\thepart}{18pt}{\large}
\titlespacing*{\part}{0pt}{50pt}{40pt}
\setcounter{secnumdepth}{3}
\def\thechapter{\Roman{chapter}}
\setlength{\cftchapnumwidth}{1cm}
\def\cftchappresnum{\normalfont\hfill}
\def\cftchapaftersnum{.\space}
\def\cftchapdotsep{\cftdotsep}
\def\cftchapfont{\normalfont\itshape}
\def\cftchappagefont{\normalfont}
\def\cftdot{{\normalfont.}}
\cftpagenumbersoff{part}
\def\cftpartfont{\large\bfseries}
\begin{document}
\tableofcontents
\part*{Book One}
\addtocontents{toc}{\vspace{10pt}{\small ODE}\par}
\chapter{Maecenas atavis}
\chapter{Jam satis}
\chapter{Sic te diva}
\chapter{Solvitur acris hiems}
\end{document}
