\NeedsTeXFormat{LaTeX2e}[1995/12/01]
\ProvidesPackage{stys/Beautybook-bottompage}[2023/01/18,v2.0]
\usepackage[ISBN=978-80-85955-35-4,SC0]{ean13isbn}
\makeatletter
%%----------------------------------封面信息定义--------------------------------------------------------%%
\newcommand\summary[1]{\def\@summary{#1}}
\newcommand\ISBNcode[1]{\def\@ISBNcode{#1}}
\newcommand\bottomimage[1]{\def\@bottomimage{#1}}
%%----------------------------------封面信息定义--------------------------------------------------------%%
\makeatother
% Define the layers to be used in document.
% *****************************************************
\pgfdeclarelayer{background} %背景%底层
\pgfdeclarelayer{foreground} %上层
\pgfdeclarelayer{top} %顶部
\pgfdeclarelayer{bottom} %底部
\pgfsetlayers{bottom,background,main,foreground,top}
\makeatletter
\newcommand*\makebottomcover{
    %% Use the Tikz library positioning and clear the page header and footer
    \newpage
    \thispagestyle{empty}
    \phantom{s}
    \clearpage
    \newpage
    \usetikzlibrary{positioning}
    \thispagestyle{empty}
    \begin{tikzpicture}[remember picture,overlay]
        \begin{pgfonlayer}{bottom}
    \node[opacity=0.85,inner sep=0pt] at (current
            page.center){\includegraphics[width=\paperwidth,height=\paperheight]{\@bottomimage}};
    \path[fill=bottomcolor!50] 
    (current page.north east) coordinate (E) --++(-.6\paperwidth,0) coordinate (B) [bend right=30] to ([yshift=-.2\paperheight]E)--cycle;
    \path[fill=bottomcolor!75,opacity=0.8] 
    (current page.north east) coordinate (E) --++(-.6\paperwidth,0) coordinate (B) [bend right=30] to ([yshift=-.25\paperheight]E)--cycle;
        \end{pgfonlayer}
        \ifdefvoid{\@summary}{}{
            \begin{pgfonlayer}{foreground}
        \fill[color=bottomcolor!80,opacity=.6]node[append after command={
        ([yshift=0.5cm]bottominfo.north west) rectangle ([yshift=-0.5cm]bottominfo.south east)},font=\large\bfseries,text=white,minimum width=\paperwidth,opacity=1] (bottominfo) at (current page.center) {\begin{varwidth}{\linewidth}\baselineskip=3ex\@summary\end{varwidth}};
        \end{pgfonlayer}
        }
        \node[text=white,left] at ([xshift=0cm,yshift=-.25\covershift]current page.north east) {%
        \parbox{.6\linewidth}{\baselineskip=22.5pt
        \raggedright
        \sc\fontsize{20}{23}\selectfont\@bookseries}
        }; %系列丛书名称
        \node[right,text=white,font=\rmfamily\Large,] at
        ([shift={(-.5cm,1.5cm)}]current page.south west)  %
    {\raisebox{-1.1cm}{\includegraphics[width=0.2\linewidth]{\@presslogo}}\hspace*{-3.5ex}\begin{varwidth}{.4\textwidth}\tikz\draw[white,line width=1.25pt] (0,0)--++(0,1cm);\,\raisebox{.25cm}{\@pressname} \end{varwidth}};%
    \ifdefvoid{\@ISBNcode}{}{
        \node[scale=1.5] (isbn) at ([shift={(-1.85\outermarginwidth,.5\covershift)}]current page.south east) {\@ISBNcode};%
        \begin{pgfonlayer}{bottom}
            \fill[white]  (isbn.north west) rectangle (isbn.south east);%
        \end{pgfonlayer}
    }
\end{tikzpicture}%
}
\makeatother
\endinput