问latex取消目录页的页眉和页角?

\def\usewhat{xelatex}

\documentclass[12pt]{ctexart}

% 仅保留必需宏包

\usepackage[leqno]{amsmath}

\usepackage{amssymb}

\usepackage{float}

\usepackage{subcaption}

\usepackage{geometry}

\usepackage{tocloft}

\usepackage{setspace}

\usepackage{fontspec}

\usepackage{fancyhdr}

\usepackage{titlesec}

% 编号与目录深度

\setcounter{secnumdepth}{3}

\setcounter{tocdepth}{3}

% 编号样式

\renewcommand{\thesection}{\arabic{section}}

\renewcommand{\thesubsection}{\thesection.\arabic{subsection}}

\renewcommand{\thesubsubsection}{\thesubsection.\arabic{subsubsection}}

% 目录点线

\renewcommand{\cftsecleader}{\cftdotfill{\cftdotsep}}

\setlength{\cftsecnumwidth}{2em}

\setlength{\cftsubsecnumwidth}{3em}

\setlength{\cftsubsubsecnumwidth}{4em}

\renewcommand{\cftdotsep}{1.5}

% 全局格式

\setstretch{1.25}

\setlength{\parindent}{2em}

% 字体

\setCJKmainfont[AutoFakeBold]{SimSun}

\setmainfont{Times New Roman}

% 章节标题

\titleformat{\section}{\normalfont\large\bfseries}{\thesection}{1em}{}

\titlespacing{\section}{0pt}{*2}{*1}

% 页边距

\geometry{left=3cm, right=2.5cm, top=2.5cm, bottom=2.5cm}

% 目录格式

\renewcommand{\contentsname}{\centerline{\songti\zihao{3}\bfseries 目录}}

\renewcommand{\cftsecfont}{\songti\fontsize{12pt}{14pt}\selectfont}

\renewcommand{\cftsubsecfont}{\songti\fontsize{12pt}{14pt}\selectfont}

\renewcommand{\cftsubsubsecfont}{\songti\fontsize{12pt}{14pt}\selectfont}

\renewcommand{\cftsecpagefont}{\fontsize{12pt}{14pt}\selectfont}

\renewcommand{\cftsubsecpagefont}{\fontsize{12pt}{14pt}\selectfont}

\renewcommand{\cftsubsubsecpagefont}{\fontsize{12pt}{14pt}\selectfont}

\cftsetindents{section}{0em}{2em}

\cftsetindents{subsection}{2em}{3em}

\cftsetindents{subsubsection}{5em}{4em}

% 自定义加粗

\newsavebox\faketextbfbox

\newcommand{\faketextbf}[1]{%

\sbox\faketextbfbox{#1}%

\rlap{\usebox\faketextbfbox}\hspace{0.02em}%

\rlap{\usebox\faketextbfbox}\hspace{0.02em}%

\usebox\faketextbfbox%

}

% 页眉页脚

\pagestyle{empty}

\fancypagestyle{mainstyle}{%

\fancyhf{}

\renewcommand{\headrulewidth}{0.4pt}

\renewcommand{\footrulewidth}{0pt}

\fancyhead[C]{\songti\zihao{5}

\ifodd\value{page}

弹性接触问题互补模型求解

\else

本科毕业设计(论文)

\fi

}

\fancyfoot[C]{\thepage}

}

\fancypagestyle{plain}{\pagestyle{mainstyle}}

\begin{document}

\begin{center}

\zihao{3}\textbf{摘要}

\end{center}

弹性接触问题普遍存在于机械装配、土木结构、工程构件连接等实际场景中，该类问题同时受

\begin{center}

\fontsize{16pt}{1.25\baselineskip}\selectfont\bfseries Abstract

\end{center}

Elastic contact problems widely exist in practical scenarios such as

\newpage

\pagestyle{empty}

\tableofcontents

\newpage

\pagestyle{mainstyle}

\pagenumbering{arabic}

\setcounter{page}{1}

\section{绪论}

弹性接触问题是固体力学与接触力学领域的典型非线性非光滑问题，广泛存在于机械装备装配

\end{document}