前言

$\LaTeX$ 中的列表风格是西方风格，不符合我国常见的列表风格，但大多数新手由于不知道、不会、懒得去阅读 texdoc enumitem，因此可能会手写列表，在《低水平 LaTeX 作品的特点》中我们知道，手写列表是非常蠢的，因此我写了一份（低水平）代码，能让新手方便的使用中式风格的列表。

更多的请阅读 texdoc enumitem。

正文

基本思路是建立一个长度 \labellengthx，\labellengthx 数值为数字+符号，再让 itemindent=2\ccwd+\the\labellengthx（x=i, ii, iii, iv），即可达到缩进两个 \ccwd 的效果。

四个计数器输出默认为 \chinese、\arabic、\alph、\roman，如果要修改，改

\renewcommand\theenumi{\chinese{enumi}}
\renewcommand\theenumii{\arabic{enumii}}
\renewcommand\theenumiii{\alph{enumiii}}
\renewcommand\theenumiv{\roman{enumiv}}

即可。要注意，有时候会出现没有正确缩进两个 \ccwd 的情况，这时候要对应修改

\def\setmytheenumi#1{\def\mytheenumi{#1}\setlength{\labellengthi}{\widthof{\mytheenumi}}}
\def\setmytheenumii#1{\def\mytheenumii{#1}\setlength{\labellengthii}{\widthof{\mytheenumii}}}
\def\setmytheenumiii#1{\def\mytheenumiii{#1}\setlength{\labellengthiii}{\widthof{a\mytheenumiii}}}
\def\setmytheenumiv#1{\def\mytheenumiv{#1}\setlength{\labellengthiv}{\widthof{i\mytheenumiv}}}

的

\setlength{\labellengthx}{\widthof{<列表第一个符号>\mytheenumx}}

部分，如果看不懂就别改了。

使用：修改

\setmytheenumi{\theenumi、}
\setmytheenumii{\theenumii．}
\setmytheenumiii{\theenumiii．}
\setmytheenumiv{\theenumiv．}

即可。

完整代码：

\documentclass{ctexart}
\usepackage{calc,enumitem}
\newlength{\labellengthi}
\setlength{\labellengthi}{0pt}
\newlength{\labellengthii}
\setlength{\labellengthii}{0pt}
\newlength{\labellengthiii}
\setlength{\labellengthiii}{0pt}
\newlength{\labellengthiv}
\setlength{\labellengthiv}{0pt}
\setlist[enumerate,1]{leftmargin=0pt,labelsep=0pt,itemindent=2\ccwd+\the\labellengthi,parsep=0pt,itemsep=0pt,topsep=0pt,partopsep=0pt,listparindent=2\ccwd}
\setlist[enumerate,2]{leftmargin=0pt,labelsep=0pt,itemindent=2\ccwd+\the\labellengthii,parsep=0pt,itemsep=0pt,topsep=0pt,partopsep=0pt,listparindent=2\ccwd}
\setlist[enumerate,3]{leftmargin=0pt,labelsep=0pt,itemindent=2\ccwd+\the\labellengthiii,parsep=0pt,itemsep=0pt,topsep=0pt,partopsep=0pt,listparindent=2\ccwd}
\setlist[enumerate,4]{leftmargin=0pt,labelsep=0pt,itemindent=2\ccwd+\the\labellengthiv,parsep=0pt,itemsep=0pt,topsep=0pt,partopsep=0pt,listparindent=2\ccwd}

\def\setmytheenumi#1{\def\mytheenumi{#1}\setlength{\labellengthi}{\widthof{\mytheenumi}}}
\def\setmytheenumii#1{\def\mytheenumii{#1}\setlength{\labellengthii}{\widthof{\mytheenumii}}}
\def\setmytheenumiii#1{\def\mytheenumiii{#1}\setlength{\labellengthiii}{\widthof{a\mytheenumiii}}}
\def\setmytheenumiv#1{\def\mytheenumiv{#1}\setlength{\labellengthiv}{\widthof{i\mytheenumiv}}}

\def\mytheenumi{\theenumi}
\def\mytheenumii{\theenumii}
\def\mytheenumiii{\theenumiii}
\def\mytheenumiv{\theenumiv}

\renewcommand\theenumi{\chinese{enumi}}
\renewcommand\theenumii{\arabic{enumii}}
\renewcommand\theenumiii{\alph{enumiii}}
\renewcommand\theenumiv{\roman{enumiv}}

\def\labelenumi{\mytheenumi}
\setlength{\labellengthi}{\widthof{\mytheenumi}}
\def\labelenumii{\mytheenumii}
\setlength{\labellengthii}{\widthof{\mytheenumii}}
\def\labelenumiii{\mytheenumiii}
\setlength{\labellengthiii}{\widthof{\mytheenumiii}}
\def\labelenumiv{\mytheenumiv}
\setlength{\labellengthiv}{\widthof{\mytheenumiv}}

\def\test{劳仑衣普桑，认至将指点效则机，最你更枝。劳仑衣普桑，认至将指点效则机，最你更枝。劳仑衣普桑，认至将指点效则机，最你更枝。}

\setmytheenumi{\theenumi、}
\setmytheenumii{\theenumii．}
\setmytheenumiii{\theenumiii．}
\setmytheenumiv{\theenumiv．}

\begin{document}
\test
\begin{enumerate}
  \item \test
  
  \test
\begin{enumerate}
  \item \test
  
  \test
\begin{enumerate}
  \item \test
  
  \test
\begin{enumerate}
  \item \test
  
  \test
\end{enumerate}
\end{enumerate}
\end{enumerate}
\end{enumerate}
\test
\end{document}

效果图：

更进一步的，还可以修改 itemize 环境的样式，例如：

\setlist[itemize,1]{leftmargin=0pt,labelsep=\ccwd-\widthof{\textbullet},itemindent=3\ccwd,parsep=0pt,itemsep=0pt,topsep=0pt,partopsep=0pt,listparindent=2\ccwd}