以下是 MWE：
\documentclass[table]{standalone}
\usepackage{graphicx, polyglossia, lipsum}
\usepackage[most]{tcolorbox}
\newtcolorbox{mybox}[2][]{%
enhanced,
before upper=\setlength{\parskip}{\bigskipamount},
colframe=black,
boxrule=2mm,
bottomrule=8mm,
colbacktitle=black,
fonttitle=\bfseries\centering,
overlay app={%
\node[white, anchor=south, text width=.95\textwidth] at (frame.south) {Some footer text};},
title=#2,#1}
\newcommand{\xxbody}{
\lipsum[2]
\noindent\includegraphics[width=\textwidth]{example-image-golden}
\lipsum[3]
}
\newcommand{\xxheading}{%
Heading
}
\begin{document}
\begin{mybox}{\LARGE \xxheading{}}
\xxbody{}
\end{mybox}
\end{document}
如何生成特定分辨率/长宽比的 PDF/ PNG 文件？