关于springer数据封面的绘制问题

随缘改了下...

\documentclass{article}
\usepackage{tikz}
\usepackage{xcolor}
\usepackage{graphicx}
\usepackage{fontspec}
\setmainfont{TeX Gyre Pagella}
\definecolor{bg@main}{RGB}{254,216,71}
\definecolor{bg@second}{RGB}{249,241,179}
\definecolor{bg@third}{RGB}{247,234,156}
\definecolor{text@main}{RGB}{254,216,71}
\definecolor{text@second}{RGB}{2,49,102}
\definecolor{text@third}{RGB}{162,148,65}
\usepackage[paperwidth=16.51cm, paperheight=24.77cm]{geometry}
\def\maketitle{%
    \newgeometry{margin=0pt}
    \begin{titlepage}
        \begin{tikzpicture}[remember picture, overlay]
            \def\textnode[##1]##2;{%
                \node[anchor=west, align=left, ##1] ##2;
            }
            \fill[left color=bg@second] (current page.north west) rectangle (current page.south east);
            \fill[bg@main] (current page.south east) rectangle ++(-0.9\paperwidth, 0.69\paperheight) coordinate (t1);
            \fill[bg@third] (t1) rectangle ++(-0.1\paperwidth, -0.137\paperheight);
            
            \draw[white, very thick] (current page.north west) ++ (.1\paperwidth, 0) -- ++ (0, -\paperheight);
            \draw[white, very thick] (current page.north west) ++ (0, -.31\paperheight) -- ++ (\paperwidth, 0);
            \draw[white, very thick] (current page.north west) ++ (0, -.447\paperheight) -- ++ (.1\paperwidth, 0);
            
            \textnode[text=text@third, font=\LARGE] at ([xshift=0.1\paperwidth + 0.75cm, yshift=-0.75cm]current page.north west) {Graduate Text in Mathematics};
            \textnode[text=text@main, scale=5, anchor=north east] at (current page.north east) {GTM};
            \textnode[text=text@second, anchor=south west, scale=2.4] at ([xshift=0.75cm]t1) {Mathematician Analysis};
            \textnode[text=text@second, anchor=north west, scale=7] at ([xshift=0cm]t1) {Introduction \\ to Real \\ Analysis};
            % 插入自定义图片并调整
            \node[anchor=south east] at ([shift={(-1cm,1cm)}]current page.south east) {%
                \begin{minipage}[b][1.5cm][c]{2cm}
                    \hfill\includegraphics[width=1.5\linewidth]{springer_horse.png}
                \end{minipage}%
                \begin{minipage}[b][1.5cm][c]{3cm}
                    \centering \huge\bfseries Springer
                \end{minipage}
            };
        \end{tikzpicture}
    \end{titlepage}
    \restoregeometry
}
\begin{document}
    \maketitle
\end{document}

• 如果你不懂，就不要乱改别人的参数，在参考链接中明明是：

\def\textnode[##1]##2;{%
                \node[anchor=west, align=left, ##1] ##2;%
            }%

怎么到你这里一抄就变成了#1和#2(?)你能解释解释吗...

• 请自行学习tikz的node的用法
• 同时再自行学习minipage环境的用法

不会markdown语法不要提问。

P.S. markdown语法是很重要的，问题描述也要完整，清楚。