\documentclass[12pt]{beautybook-nosidebar}
\coverstyle={
    cover-choose=en, % cn (en ; enfig ; birkar)
}
\mathstyle={
    math-font=plain, % plain; ptmx; mtpro2 ;stix
}
\theoremstyle{plain}
\newtheorem{thm}{thm}[section]
\newtheorem{theorem}[thm]{Theorem}
\newtheorem{lemma}[thm]{Lemma}
\newtheorem{corollary}[thm]{Corollary}
\newtheorem{proposition}[thm]{Proposition}
\newtheorem{addendum}[thm]{Addendum}
\newtheorem{variant}[thm]{Variant}
\newtheorem{observation}[thm]{Observation}

\theoremstyle{definition}
\newtheorem{construction}[thm]{Construction}
\newtheorem{conjecture}[thm]{Conjecture}
\newtheorem{notations}[thm]{Notations}
\newtheorem{question}[thm]{Question}
\newtheorem{problem}[thm]{Problem}
\newtheorem{remark}[thm]{Remark}
\newtheorem{remarks}[thm]{Remarks}
\newtheorem{definition}[thm]{Definition}
\newtheorem{claim}[thm]{Claim}
\newtheorem{assumption}[thm]{Assumption}
\newtheorem{assumptions}[thm]{Assumptions}
\newtheorem{properties}[thm]{Properties}
\newtheorem{example}[thm]{Example}
\newtheorem{comments}[thm]{Comments}

%% --------参考文献
\RequirePackage[
backend=biber,
style=numeric,
sorting=nty
]{biblatex}
% \addbibresource{ref.bib}

\indexsetup{level=\chapter*,noclearpage}
\makeindex[title={\sffamily References},columns=3,columnsep=15pt,columnseprule]
\makeindex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcommand{\pr}{^\prime}
\newcommand{\prr}{^{\prime\prime}}
\newcommand{\bd}{\partial}
\newcommand{\bdd}{\overline{\partial}}
\newcommand{\Dif}[2]{\frac{\dd #1}{\dd #2}}
\newcommand{\Diff}[2][]{\frac{\partial #1}{\partial #2}}
\usepackage{shadowtext}\shadowoffset{.65pt}
\newcommand*{\circledd}[1]{\lower.7ex\hbox{\tikz\draw (0pt, 0pt)%
    circle (.5em) node {\makebox[1em][c]{\small #1}};}}
\newcommand{\dbar}{\overline{\partial}}
\newcommand{\pa}{\partial}
\newcommand{\ov}{\overline}
\newcommand{\xu}{\sqrt{-1}}
\definecolor{backgroundcolor}{HTML}{F5F5F5}
\pagecolor{backgroundcolor}
\begin{document}
\thispagestyle{empty}
\title{beautybook}
\subtitle{beautybook}
\edition{First Edition}
\bookseries{Notes}
\author{Ethan Lu}
\pressname{Springer}
\presslogo{inner_pics/Springer-logo.png}
\coverimage{inner_pics/coverimage.jpg}%ivy-ge998908f8_1280.jpg
\makecover


\definecolor{bg}{HTML}{e0e0e0}
\definecolor{fg}{HTML}{000000}%2c4f54
\colorlet{outermarginbgcolor}{bg}
\colorlet{outermarginfgcolor}{fg!60}
\colorlet{framegolden}{fg}
\colorlet{framegray}{bg!50}

\makeatletter
% set the contents of the outer margin on even and odd pages for scrheadings, plain and scth
% \oddoutermargin{\sffamily } % Odd 奇数页\leftmark
% \evenoutermargin{\sffamily\@title} % Even 偶数页
%
\titleimage{
  chapteroddimage={odd1,odd2,odd3,odd4,odd5,odd6,odd7,odd8,odd9,odd10,odd11,odd12,odd13,odd14,odd15,mid1,mid2,mid3,mid4,mid5,mid6,mid7,mid8,mid9,mid10,mid11},
%
  partoddimage={odd1,odd2,odd3,odd4,odd5,odd6,odd7,odd8,odd9,odd10,odd11,odd12,odd13,odd14,odd15,mid1,mid2,mid3,mid4,mid5,mid6,mid7,mid8,mid9,mid10,mid11},
%
  chapterevenimage={songeven,even1,even2,even3,even4,mid1,mid2,mid3,mid4,mid5,mid6,mid7,mid8,mid9,mid10,mid11},
%
  partevenimage={songeven,even1,even2,even3,even4,mid1,mid2,mid3,mid4,mid5,mid6,mid7,mid8,mid9,mid10,mid11},
}
\chapimage{\beautybook@chapterimagename} % 会自动改变
\partimage{\beautybook@partimagename}    % 会自动改变
\makeatother
%
\frontmatter
\pagenumbering{Roman}

{% Preface
\thispagestyle{empty}
% \addcontentsline{toc}{chapter}{Preface}
\chapter*{Preface}
Test


\hfill
\begin{tabular}{lr}
    &----- Ethan Lu\\ 
    &2023-09-01
\end{tabular}
\clearpage}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\thispagestyle{empty}
\tableofcontents\let\cleardoublepage\clearpage


\mainmatter
\pagenumbering{arabic}

\partabstract{\fontsize{15pt}{15pt}\selectfont Abstract.}
\part{Notes}


\chapter{Test}\index{Test}

\section{Preliminaries}\index{Preliminaries}
Test









% \printbibliography[heading=bibintoc,title={Bibliography}]
\printindex\thispagestyle{empty}
\bottomimage{inner_pics/coverimage.jpg}
\ISBNcode{\EANisbn[ISBN=978-80-7340-097-2]} %
\summary{A Research Notes Series For papers.}
\makebottomcover
\end{document} 




