\documentclass[$if(fontsize)$$fontsize$,$endif$$if(lang)$$lang$,$endif$$if(papersize)$$papersize$,$endif$]{$documentclass$}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{amssymb,amsmath}
\usepackage{euler}
\usepackage{ifxetex,ifluatex}
\usepackage{fixltx2e} % provides \textsubscript
% use microtype if available
\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
  \IfFileExists{microtype.sty}{\usepackage{microtype}}{}
  \usepackage[utf8]{inputenc}
$if(euro)$
  \usepackage{eurosym}
$endif$
\else % if luatex or xelatex
  \usepackage[nofonts,nocap,nopunct,fancyhdr,fntef,hyperref,UTF8]{ctex}
  \newcommand{\euro}{€}
$if(mainfont)$
    \setmainfont{$mainfont$}
%$else$
    %\setmainfont{Livory}
$endif$
$if(sansfont)$
    \setsansfont{$sansfont$}
%$else$
    %\setsansfont{Myriad Pro}
$endif$
$if(monofont)$
    \setmonofont{$monofont$}
$else$
    \setmonofont[Mapping={}]{Source Code Pro}
$endif$
$if(mathfont)$
    \setmathfont{$mathfont$}
$endif$
$if(cjkmainfont)$
    \setCJKmainfont{$mainfont$}
$else$
    \setCJKmainfont[ItalicFont={Adobe Kaiti Std R}, BoldFont={方正小标宋_GBK}]{方正书宋_GBK}
$endif$
$if(cjksansfont)$
    \setCJKsansfont{$sansfont$}
$else$
    %\setCJKsansfont[ItalicFont={Adobe Kaiti Std R},BoldFont={Adobe Heiti Std}]{华文细黑}
    \setCJKsansfont[ItalicFont={Adobe Kaiti Std R}, BoldFont={Hiragino Sans GB W6}]{Hiragino Sans GB}
$endif$
$if(cjkmonofont)$
    \setCJKmonofont{$monofont$}
$else$
    \setCJKmonofont[BoldFont={Hiragino Sans GB W6}]{Adobe Fangsong Std}
$endif$
%\renewcommand\familydefault{\sfdefault}
%\renewcommand\CJKfamilydefault{\CJKsfdefault}
\fi
$if(geometry)$
\usepackage[$for(geometry)$$geometry$$sep$,$endfor$]{geometry}
$endif$
$if(natbib)$
\usepackage{natbib}
\bibliographystyle{plainnat}
$endif$
$if(biblatex)$
\usepackage{biblatex}
$if(biblio-files)$
\bibliography{$biblio-files$}
$endif$
$endif$
$if(listings)$
\usepackage{listings}
\lstset{basicstyle=\ttfamily\small,breaklines}
$endif$
$if(lhs)$
\lstnewenvironment{code}{\lstset{language=Haskell,basicstyle=\small\ttfamily}}{}
$endif$
$if(highlighting-macros)$
$highlighting-macros$
$endif$
$if(verbatim-in-note)$
\usepackage{fancyvrb}
$endif$
$if(tables)$
\usepackage{longtable}
$endif$
$if(graphics)$
\usepackage{graphicx}
% We will generate all images so they have a width \maxwidth. This means
% that they will get their normal width if they fit onto the page, but
% are scaled down if they would overflow the margins.
\makeatletter
\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth
\else\Gin@nat@width\fi}
\makeatother
\let\Oldincludegraphics\includegraphics
\renewcommand{\includegraphics}[1]{\Oldincludegraphics[width=\maxwidth]{#1}}
$endif$
\ifxetex
%   \usepackage[setpagesize=false, % page size defined by xetex
%               xetex]{hyperref}
\else
  \usepackage[unicode=true]{hyperref}
\fi
\hypersetup{breaklinks=true,
            bookmarks=true,
            pdfauthor={$author-meta$},
            pdftitle={$title-meta$},
            colorlinks=true,
            urlcolor=$if(urlcolor)$$urlcolor$$else$blue$endif$,
            linkcolor=$if(linkcolor)$$linkcolor$$else$magenta$endif$,
            pdfborder={0 0 0}}
$if(links-as-notes)$
% Make links footnotes instead of hotlinks:
\renewcommand{\href}[2]{#2\footnote{\url{#1}}}
$endif$
$if(strikeout)$
%\usepackage[normalem]{ulem}
% avoid problems with \sout in headers with hyperref:
\AtEndPreamble{\pdfstringdefDisableCommands{\renewcommand{\sout}{}}}
$endif$
\setlength{\parindent}{0pt}
\setlength{\parskip}{6pt plus 2pt minus 1pt}
\setlength{\emergencystretch}{3em}  % prevent overfull lines
$if(numbersections)$
$else$
\setcounter{secnumdepth}{0}
$endif$
$if(verbatim-in-note)$
\AtEndPreamble{\VerbatimFootnotes} % allows verbatim text in footnotes
$endif$
$if(lang)$
\ifxetex
  \usepackage{polyglossia}
  \setmainlanguage{$mainlang$}
\else
  \usepackage[$lang$]{babel}
\fi
$endif$
$for(header-includes)$
$header-includes$
$endfor$

$if(title)$
\title{$title$}
$endif$
\author{$for(author)$$author$$sep$ \and $endfor$}
\date{$date$}

\begin{document}
$if(title)$
\maketitle
$endif$

$for(include-before)$
$include-before$

$endfor$
$if(toc)$
{
\hypersetup{linkcolor=black}
\tableofcontents
}
$endif$
$body$

$if(natbib)$
$if(biblio-files)$
$if(biblio-title)$
$if(book-class)$
\renewcommand\bibname{$biblio-title$}
$else$
\renewcommand\refname{$biblio-title$}
$endif$
$endif$
\bibliography{$biblio-files$}

$endif$
$endif$
$if(biblatex)$
\printbibliography$if(biblio-title)$[title=$biblio-title$]$endif$

$endif$
$for(include-after)$
$include-after$

$endfor$
\end{document}