![A4 纸张大小报告中 A3 纸张大小的页眉和页脚](https://linux22.com/image/343145/A4%20%E7%BA%B8%E5%BC%A0%E5%A4%A7%E5%B0%8F%E6%8A%A5%E5%91%8A%E4%B8%AD%20A3%20%E7%BA%B8%E5%BC%A0%E5%A4%A7%E5%B0%8F%E7%9A%84%E9%A1%B5%E7%9C%89%E5%92%8C%E9%A1%B5%E8%84%9A.png)
我如何让第 1 章下的线跟随整个 A3 纸?就像底部的线一样。
\documentclass[a4paper,11pt,fleqn,twoside,openany]{memoir}
\usepackage{lipsum}
\usepackage[dvipsnames]{xcolor}
\makepagestyle{Uni}
\makepsmarks{Uni}{%
\createmark{chapter}{left}{shownumber}{}{. \ }
\createmark{section}{right}{shownumber}{}{. \ }
\createplainmark{toc}{both}{\contentsname}
\createplainmark{lof}{both}{\listfigurename}
\createplainmark{lot}{both}{\listtablename}
\createplainmark{bib}{both}{\bibname}
\createplainmark{index}{both}{\indexname}
\createplainmark{glossary}{both}{\glossaryname}
}
\makeevenhead{Uni}{example}{}{\leftmark}
\makeoddhead{Uni}{\rightmark}{}{example}
\makeevenfoot{Uni}{\thepage}{}{}
\makeoddfoot{Uni}{}{}{\thepage}
\makeheadrule{Uni}{\textwidth}{0.5pt}
\makefootrule{Uni}{\textwidth}{0.5pt}{1mm}
\copypagestyle{Unichap}{Uni}
\makeoddhead{Unichap}{}{}{}
\makeevenhead{Unichap}{}{}{}
\makeheadrule{Unichap}{\textwidth}{0pt}
\aliaspagestyle{chapter}{Unichap}
\pagestyle{Uni}
\newsavebox{\ChpNumBox}
\definecolor{ChapBlue}{RGB}{120,200,240}
\makeatletter
\newcommand*{\thickhrulefill}{%
\leavevmode\leaders\hrule height 1\p@ \hfill \kern \z@}
\newcommand*\BuildChpNum[2]{%
\begin{tabular}[t]{@{}c@{}}
\makebox[0pt][c]{#1\strut} \\[.5ex]
\colorbox{ChapBlue}{%
\rule[-3,5em]{0pt}{0pt}%
\rule{1ex}{0pt}\color{black}#2\strut
\rule{1ex}{0pt}}%
\end{tabular}}
\makechapterstyle{BlueBox}{%
\renewcommand{\chapnamefont}{\large\scshape}
\renewcommand{\chapnumfont}{\Huge\bfseries}
\renewcommand{\chaptitlefont}{\raggedright\Huge\bfseries}
\setlength{\beforechapskip}{10pt}
\setlength{\midchapskip}{16pt}
\setlength{\afterchapskip}{10pt}
\renewcommand{\printchaptername}{}
\renewcommand{\chapternamenum}{}
\renewcommand{\printchapternum}{%
\sbox{\ChpNumBox}{%
\BuildChpNum{\chapnamefont\@chapapp}%
{\chapnumfont\thechapter}}}
\renewcommand{\printchapternonum}{%
\sbox{\ChpNumBox}{%
\BuildChpNum{\chapnamefont\vphantom{\@chapapp}}%
{\chapnumfont\hphantom{\thechapter}}}}
\renewcommand{\afterchapternum}{}
\renewcommand{\printchaptertitle}[1]{%
\usebox{\ChpNumBox}\hfill
\parbox[t]{\hsize-\wd\ChpNumBox-1em}{%
\vspace{\midchapskip}%
\thickhrulefill\par
\chaptitlefont ##1\par}}%
}
\chapterstyle{BlueBox}
\begin{document}
\thispagestyle{empty}
{\pdfpagewidth=2\pdfpagewidth
\textwidth=350mm
\chapter{example}
\begin{table}
\centering
\begin{tabular}{l|l}
1.1 & 295 \\
1.2 & 345 \\
\end{tabular}
\end{table}
\lipsum
\end{document}