不带标号的标题居中问题

想居中不带编号的标题,并在目录中显示,但是出现了这种情况发行版:TeXLive2020VScode编写MWE:

\documentclass{article}

\usepackage{ctex}

\usepackage{graphicx,titletoc}

\newcommand*{\song}{\CJKfamily{zhsong}} % 宋体

\newcommand*{\hei}{\CJKfamily{zhhei}} % 黑体

\newcommand*{\kai}{\CJKfamily{zhkai}} % 楷书

\renewcommand{\baselinestretch}{1.25} % 1.5倍行距

\newcommand{\erhao}{\fontsize{22pt}{33pt}\selectfont}

\newcommand{\sanhao}{\fontsize{16pt}{24pt}\selectfont}

\newcommand{\sihao}{\fontsize{14pt}{21pt}\selectfont}

\newcommand{\xiaosi}{\fontsize{12pt}{18pt}\selectfont}

\newcommand{\wuhao}{\fontsize{10.5pt}{\baselineskip}\selectfont}

\ctexset{

section={

format={\zihao{3}\heiti},

name={},

aftername={\hspace{1em}},

number=\arabic{section},

},

subsection={

format={\zihao{4}\heiti},

name={},

aftername={\hspace{1em}},

number={\arabic{section}.\arabic{subsection}},

},

subsubsection={

format={\zihao{-4}\heiti},

name={},

aftername={\hspace{1em}},

number={\arabic{section}.\arabic{subsection}.\arabic{subsubsection}},

},

paragraph={

format={\zihao{-4}\heiti},

name={},

aftername={\hspace{1em}},

number={\arabic{section}.\arabic{subsection}.\arabic{subsubsection}.\arabic{paragraph}}

},

appendix={

name={附录,:},

number=\arabic{section},

}

}

\titlecontents{section}

[0mm]

{\xiaosi \hei \vspace{7.5pt}}%

{\contentslabel{6.35mm}}%

{}%

{{~\titlerule*[0.6pc]{$.$}~\contentspage}}%

\titlecontents{subsection}

[3.175mm]

{\xiaosi \song \vspace{7.5pt}}%

{\contentslabel{9.525mm}}%

{}%

{{~\titlerule*[0.6pc]{$.$}~\contentspage}}%

\titlecontents{subsubsection}

[6.35mm]

{\xiaosi \song \vspace{7.5pt}}%

{\contentslabel{12.7mm}}%

{}%

{{~\titlerule*[0.6pc]{$.$}~\contentspage}}%

\titlecontents{paragraph}

[9.525mm]

{\xiaosi \song \vspace{7.5pt}}%

{\contentslabel{15.875mm}}%

{}%

{{~\titlerule*[0.6pc]{$.$}~\contentspage}}%

\newcommand\specialsectioning{\setcounter{secnumdepth}{-2}}

\title{标题标题标题}

\begin{document}

\section{一级标题}

文本文本

\newpage

\specialsectioning

\centering{ \section{总结与展望} }

文本文本

\end{document} 查看更多