ouc-slide-latex-template/theme/beamerinnerthemeOUCSlide.sty

%% 版本:1.0
%% 作者：杨永全
%% 本文件的主要目的，是为了定义列表等内部元素的样式
%% 完成时间：2022-05-09

\RequirePackage{listings,verbatim}%引入代码包
\RequirePackage{caption}
\usepackage{tcolorbox} %引入彩色框
\tcbuselibrary{most} %引入所有包

%列表样式，使用了fontawesome图标
\setbeamertemplate{itemize item}{\faBookmark}
\setbeamertemplate{itemize subitem}{\faHandORight}
\setbeamertemplate{itemize subsubitem}{\faSquare}

%超链接的颜色等信息
\hypersetup{
    %colorlinks=true, %超链接颜色，全部使用海大红。
    linkcolor=oucred,
    urlcolor=oucred,
    citecolor=oucred,
    anchorcolor=oucred,
}

%代码块的一些设定，原模板代码
\renewcommand{\ttdefault}{pcr}
\lstset{
    frame=shadowbox,
    numbers=left, 
    numberstyle=\small,
    basicstyle=\ttfamily\upshape\small,
    breaklines=true,
    backgroundcolor=\color{oucsilver10},
    xleftmargin=0.8cm,
    framexleftmargin=0em,
    keywordstyle=\bfseries\color{oucblue},
    stringstyle=\color{oucblue},
    commentstyle=\color{mygreen},
    rulesepcolor= \color{oucsilver40},
    rulecolor=\color{oucblue},
    deletekeywords={compile},
    escapechar=\&,
    escapeinside={<@}{@>}
}

%% 代码块标题设定
\DeclareCaptionFormat{codecaptionformat}{%
  \parbox{\textwidth}{\hspace{2em}\textcolor{violet}\faCode~\textcolor{violet}{#1#2}\hspace{.5em}#3}%代码块caption的设置
}
\captionsetup[lstlisting]{format=codecaptionformat}

%设置信息框titlebox
\newtcolorbox{titlebox}[2][]
{
    title=#1, %标题
    colback = white, %标题背景是白色
    colframe = #2, %边框颜色
    coltitle = #2, %标题颜色
    boxrule=.5pt,%边框的粗细，细一点感觉更精致
    boxed title style={size=normal,colframe=white,boxrule=0pt},%标题栏没有背景色和边框，只有文字
    left=5pt, right=5pt, top=5pt, bottom=0pt,%内部文字边距
    boxsep=5pt,
    colbacktitle = white, enhanced,%标题的背景，白色
    attach boxed title to top center={yshift=-4mm},%把标题放在中间
    opacityupper={100}, %上面边框透明度
}

%设置笔记提示框
\newtcolorbox{notebox}[1][]
{
    enhanced,
    arc=2pt,%圆角
    boxrule=.5pt,%边框
    left=5pt, right=5pt, top=0pt, bottom=0pt,%文字边距
    boxsep=5pt,
    colframe=oucblue,
    colback=oucblue10,
    colbacktitle=oucblue10,
    coltext=oucblue,
    title={\textcolor{oucblue}{\faStickyNoteO\hspace{.5em}\bfseries{\textbf{#1}}}},
    halign=left,
}
%设置重要提示框
\newtcolorbox{importantbox}[1][]
{
    enhanced,
    arc=2pt,
    boxrule=.5pt,
    left=5pt, right=5pt, top=0pt, bottom=0pt,
    boxsep=5pt,
    colframe=oucred,
    colback=oucred10,
    colbacktitle=oucred10,
    coltext=oucred,
    title={\textcolor{oucred}{\faExclamationCircle\hspace{.5em}\bfseries{\textbf{#1}}}},
    halign=left,
}
%列表框
\newtcolorbox{vcolorbox}[2][]
{
    boxrule=0.5pt,%边框，很细
    arc=0pt,outer arc=0pt,%不要圆角
    left=5pt, right=5pt, top=0pt, bottom=0pt,
    leftrule=5pt, %左侧边框的宽度 
    colframe=#2,%边框的颜色
    colback=white,
    colbacktitle=white,
    coltext=black,%内部文字的颜色，如果要和标题保持一致，可改为#2
    title={\textcolor{#2}{\bfseries{\textbf{#1}}}},%标题样式
    halign=left,
}

%要点框
\newtcolorbox{pointbox}[3][]
{
    colback = white, %背景是白色
    boxrule=0.5pt,%边框的粗细，细一点感觉更精致
    colframe = #2, %边框颜色
    fonttitle = \bfseries,%标题加粗
    colbacktitle = #2, enhanced,
    left=2pt, right=2pt, top=5pt, bottom=0pt,%内部文字边距
    attach boxed title to top center={yshift=-2mm},
    width=\textwidth,
    height=#3,
    title=#1
}

%% ======================================================================
%%  要点框自动排布：pointboxgrid
%% ----------------------------------------------------------------------
%%  把任意多个要点自动排成「每行最多 4 个」的网格：
%%     \begin{pointboxgrid}{高度}
%%       \pointitem{标题}{颜色}{内容}
%%       ...
%%     \end{pointboxgrid}
%%
%%  排布规则（行数尽可能少，并尽量均匀）：
%%     1~4 个  → 一行
%%     5 个    → 上行 3 + 下行 2
%%     6 个    → 3 + 3
%%     7 个    → 4 + 3
%%     8 个    → 4 + 4
%%     9 个    → 3 + 3 + 3
%%     10 个   → 4 + 3 + 3
%%     11 个   → 4 + 4 + 3
%%     12 个   → 4 + 4 + 4
%%     一般地：行数 = ceil(N/4)，前 N mod 行数 行每行多放 1 个。
%%
%%  说明：
%%   - 高度参数与 pointbox 的 height 含义相同（固定高度，内容别超出）。
%%   - 较多行时请自行减小高度，避免总高超出页面（建议行数 ≤ 4）。
%%   - 「每行最多几个」由 \ouc_pbg_max 控制；间距由 \ouc_pbg_gap /
%%     \ouc_pbg_vgap 控制，需要时在导言区改这两个长度。
%% ======================================================================
\ExplSyntaxOn
\int_new:N   \l_ouc_pbg_cnt
\int_new:N   \l_ouc_pbg_n
\int_new:N   \l_ouc_pbg_rows
\int_new:N   \l_ouc_pbg_base
\int_new:N   \l_ouc_pbg_rem
\int_new:N   \l_ouc_pbg_k
\int_new:N   \l_ouc_pbg_km
\int_new:N   \l_ouc_pbg_i
\int_new:N   \l_ouc_pbg_max
\dim_new:N   \l_ouc_pbg_est
\dim_new:N   \l_ouc_pbg_colw
\dim_new:N   \l_ouc_pbg_gap
\dim_new:N   \l_ouc_pbg_vgap
\dim_new:N   \l_ouc_pbg_h
\int_set:Nn  \l_ouc_pbg_max  { 4 }
\dim_new:N   \l_ouc_pbg_avail
\dim_set:Nn  \l_ouc_pbg_avail { 243pt }
\dim_set:Nn  \l_ouc_pbg_gap  { 8pt }
\dim_set:Nn  \l_ouc_pbg_vgap { 6pt }

%% 收集一个要点：内容按原样存进带索引的宏，不做任何展开
\NewDocumentCommand \pointitem { m m m }
  {
    \int_incr:N \l_ouc_pbg_cnt
    \tl_set:cn { l_ouc_pbg_t_ \int_use:N \l_ouc_pbg_cnt } {#1}
    \tl_set:cn { l_ouc_pbg_c_ \int_use:N \l_ouc_pbg_cnt } {#2}
    \tl_set:cn { l_ouc_pbg_b_ \int_use:N \l_ouc_pbg_cnt } {#3}
  }

%% 画一个要点框：按序号直接取用存好的宏
\cs_new_protected:Npn \ouc_pbg_emit:n #1
  {
    \begin{pointbox}
      [ \tl_use:c { l_ouc_pbg_t_#1 } ]
      { \tl_use:c { l_ouc_pbg_c_#1 } }
      { \dim_use:N \l_ouc_pbg_h }
      \tl_use:c { l_ouc_pbg_b_#1 }
    \end{pointbox}
  }

%% 列宽 = (正文宽 - (k-1)*间距) / k
%% 注：某些 TeX Live 下 expl3 的维度乘法（*）会静默算出 0，
%%     因此走 fp_eval + dim_to_fp 的浮点路径，稳妥。
\cs_new_protected:Nn \ouc_pbg_setcolw:
  {
    \int_set:Nn \l_ouc_pbg_km { \int_use:N \l_ouc_pbg_k - 1 }
    \dim_set:Nn \l_ouc_pbg_colw
      {
        \fp_eval:n
          {
            ( \dim_to_fp:n { \textwidth }
              - \int_use:N \l_ouc_pbg_km * \dim_to_fp:n { \l_ouc_pbg_gap } )
            / \int_use:N \l_ouc_pbg_k
          }
        pt
      }
  }

\cs_new_protected:Nn \ouc_pbg_typeset:
  {
    \int_set:Nn \l_ouc_pbg_n { \int_use:N \l_ouc_pbg_cnt }
    \int_compare:nNnT { \int_use:N \l_ouc_pbg_n } > { 0 }
      {
        %% 行数 = ceil(N / max)
        \int_set:Nn \l_ouc_pbg_rows
          {
            \int_div_truncate:nn
              { \int_use:N \l_ouc_pbg_n + \int_use:N \l_ouc_pbg_max - 1 }
              { \int_use:N \l_ouc_pbg_max }
          }
        %% 均匀分配：前 rem 行每行多 1 个（上行不少于下行）
        \int_set:Nn \l_ouc_pbg_base
          {
            \int_div_truncate:nn
              { \int_use:N \l_ouc_pbg_n } { \int_use:N \l_ouc_pbg_rows }
          }
        \int_set:Nn \l_ouc_pbg_rem
          {
            \int_use:N \l_ouc_pbg_n
            - \int_use:N \l_ouc_pbg_base * \int_use:N \l_ouc_pbg_rows
          }
        %% 预估总高度并与正文可用高度比较（公式按实测校准）：
        %%   总高 ≈ 69pt(首行含标题条) + 行数*高度 + (行数-1)*25pt(行间距)
        \dim_set:Nn \l_ouc_pbg_est
          {
            \fp_eval:n
              {
                69
                + \int_use:N \l_ouc_pbg_rows * \dim_to_fp:n { \l_ouc_pbg_h }
                + ( \int_use:N \l_ouc_pbg_rows - 1 ) * 25
              }
            pt
          }
        \ifdim \l_ouc_pbg_est > \l_ouc_pbg_avail
          \PackageWarning{oucslide}
            {
              要点框共 \int_use:N \l_ouc_pbg_n\space 个，排成
              \int_use:N \l_ouc_pbg_rows\space 行、每框高 \dim_use:N \l_ouc_pbg_h，
              预估总高 \dim_use:N \l_ouc_pbg_est\space 已超过正文可用高度
              \dim_use:N \l_ouc_pbg_avail，可能超出页面底部。
              请把高度改小（4 行时建议不超过 24pt）或减少要点个数
            }
        \fi
        \int_zero:N \l_ouc_pbg_i
        \int_step_inline:nn { \int_use:N \l_ouc_pbg_rows }
          {
            \int_set:Nn \l_ouc_pbg_k { \int_use:N \l_ouc_pbg_base }
            %% 注意：此处的比较必须用 \ifnum。
            %% expl3 的 \int_compare:nNnT 在这套 TeX Live 下判定有误，
            %% 会把所有 ##1 都判成"小于等于"，导致行内个数分配失效。
            \ifnum ##1 > \int_use:N \l_ouc_pbg_rem \else
              \int_incr:N \l_ouc_pbg_k
            \fi
            \ouc_pbg_setcolw:
            %% 必须用 [onlytextwidth]，否则默认 columns 会带来
            %% 左/右边距，4 列时左右各溢出约 10pt。
            \begin{columns}[onlytextwidth]
              \int_step_inline:nn { \int_use:N \l_ouc_pbg_k }
                {
                  \int_incr:N \l_ouc_pbg_i
                  \begin{column}{\dim_use:N \l_ouc_pbg_colw}
                    \ouc_pbg_emit:n { \int_use:N \l_ouc_pbg_i }
                  \end{column}
                }
            \end{columns}
            \ifnum ##1 < \int_use:N \l_ouc_pbg_rows
              \vspace{\dim_use:N \l_ouc_pbg_vgap}
            \fi
          }
      }
  }

%% 友好设置：\pointboxsetup{每行最多几个}{横向间距}{纵向间距}
%% 例如 \pointboxsetup{5}{6pt}{4pt}
\NewDocumentCommand \pointboxsetup { m m m }
  {
    \int_set:Nn \l_ouc_pbg_max  {#1}
    \dim_set:Nn \l_ouc_pbg_gap  {#2}
    \dim_set:Nn \l_ouc_pbg_vgap {#3}
  }

\NewDocumentEnvironment { pointboxgrid } { m }
  { \int_zero:N \l_ouc_pbg_cnt \dim_set:Nn \l_ouc_pbg_h {#1} }
  { \ouc_pbg_typeset: }
\ExplSyntaxOff



%% ======================================================================
%文本框textbox
\newtcolorbox{textbox}[1]{
    colback=#1!5!white,
    colframe=#1,
    boxrule=0.5pt,
    arc=2pt,
}

%标题框headbox
\newtcolorbox{headbox}[1]{
    colback=#1,
    colframe=#1,
    boxrule=0.5pt,
    arc=2pt,
    coltext=white,
    fontupper= \bfseries,
    left=0pt, right=0pt, top=0pt, bottom=0pt,%内部文字边距
}


%一些元素的中文名称
\renewcommand{\figurename}{图}
\renewcommand{\tablename}{表}
\renewcommand{\lstlistingname}{代码}
\renewcommand{\abstractname}{摘要}

%% ======================================================================
%%  扁平简约图示组件  (flat diagrams)
%%  ---------------------------------------------------------------------
%%  设计基调：圆角块 + 实心纯色 + 白字 + 细箭头
%%            **无渐变、无阴影、无立体**
%%
%%  所有组件都支持「颜色列表」：写一个颜色则全部同色；
%%  写多个颜色（逗号分隔）则按顺序循环取色。
%%     \flatflow{oucblue}                  % 4 个块全为海大蓝
%%     \flatflow{oucblue,oucred,oucpine}   % 4 个块循环取这 3 色
%%     \flatflow{oucblue,oucred,oucpine,oucdusk,oucamber}  % 5 色各不同
%% ======================================================================

\RequirePackage{tikz}
\usetikzlibrary{positioning,arrows.meta,calc,shapes.geometric}

%% ---------------- 防错：颜色参数必须写在 [] 里 ----------------
%% \flatflow 这类命令的「颜色列表」是可选参数，必须写成方括号 [颜色]。
%% 若误写成花括号 {颜色}，颜色会被当成第一个条目（静默出错、极难排查），
%% 因此这里检查每个条目是不是模板的颜色名，是则明确报错。
\newcommand{\flcheckitems}[1]{%
  \foreach \flci in {#1}{%
    %% 注意：\foreach 每轮迭代会开组，内层的 \def 出组即失效，
    %%       因此这里必须用 \global\def（否则检测永远不触发）。
    \global\def\flhit{0}%
    \foreach \flck in {oucblue,ouclightblue,oucred,ouccherry,oucbrown,%
                       oucgolden,oucsilver,oucpine,oucdusk,oucamber}{%
      %% 注意：此处 \ifstrequal 在本机不生效（恒为假），必须用 \ifx
      \ifx\flci\flck\global\def\flhit{1}\fi
    }%
    \ifnum\flhit=1
      \PackageError{oucslide}{图示组件的颜色要写在方括号里}{%
        命令 \string\flatflow[颜色列表]{条目1, 条目2} 中的颜色是可选参数，%
        必须用方括号 [ ]，不能用花括号 { }。\MessageBreak
        现在「\flci」被当成了条目内容（它看起来是颜色名）。}%
    \fi
  }%
}

%% ---------------- 辅助：长度 / 计数 / 取色 ----------------
\newlength\flgap
\newlength\flbw
\newcount\flcnt
\def\flcntval{0}
%% 数条目个数，并存成**纯数字宏**（本机 pgfmath 的算式里不能出现计数器）
\newcommand{\flcount}[1]{%
  \flcnt=0
  \foreach \flzz in {#1}{\global\advance\flcnt by 1}%
  \xdef\flcntval{\the\flcnt}%
}

\newcount\flcolcnt
\def\flcoln{0}
\newcommand{\flcolcount}[1]{%
  \flcolcnt=0
  \foreach \flzz in {#1}{\global\advance\flcolcnt by 1}%
  \xdef\flcoln{\the\flcolcnt}%
}

\def\flcur{oucblue}
\def\flmain{oucblue}
%% 第 #2 个块取颜色列表 #1 中的颜色（超出则循环），结果存进 \flcur
\newcommand{\flpick}[2]{%
  \pgfmathtruncatemacro{\flidx}{mod(#2-1,\flcoln)+1}%
  \foreach \flzz [count=\fljj] in {#1}{%
    \ifnum\fljj=\flidx \xdef\flcur{\flzz}\fi
  }%
}
%% 取列表第一项作为「主色」（箭头、轴线等用）
\newcommand{\flsetmain}[1]{\flpick{#1}{1}\xdef\flmain{\flcur}}

%% ---------------- 公共样式 ----------------
\tikzset{
  flblk/.style={rectangle, rounded corners=2pt, draw=none,
                text=white, align=center, inner sep=4pt, font=\small},
  flblkl/.style={rectangle, rounded corners=2pt, draw=none,
                 align=center, inner sep=4pt, font=\footnotesize},
  flarr/.style={line width=1pt, -{Stealth[length=1.7mm,width=1.4mm]}}
}

%% ================== 1. 横向箭头流程 ==================
%% \flatflow[颜色列表]{条目1, 条目2, ...}
\NewDocumentCommand \flatflow { O{oucblue} m }{{%
  \flcheckitems{#2}\flcount{#2}\flcolcount{#1}\flsetmain{#1}%
  \setlength{\flgap}{16pt}%
  \pgfmathsetlength{\flbw}{(0.99\textwidth-(\flcntval-1)*\flgap)/\flcntval}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathtruncatemacro{\flprev}{\fli-1}
      \ifnum\fli=1
        \node[flblk, fill=\flcur, minimum height=20pt,
              text width=\dimexpr\flbw-8pt\relax] (fn1) at (0,0) {\flx};
      \else
        \node[flblk, fill=\flcur, minimum height=20pt,
              text width=\dimexpr\flbw-8pt\relax,
              right=\flgap of fn\flprev] (fn\fli) {\flx};
      \fi
    }%
    \foreach \flx [count=\fli] in {#2} {
      \ifnum\fli>1
        \pgfmathtruncatemacro{\flprev}{\fli-1}
        \draw[flarr, draw=\flmain!70!black] (fn\flprev.east) -- (fn\fli.west);
      \fi
    }%
  \end{tikzpicture}%
}}

%% ================== 2. 纵向流程 ==================
\NewDocumentCommand \flatstack { O{oucblue} m }{{%
  \flcheckitems{#2}\flcount{#2}\flcolcount{#1}\flsetmain{#1}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathtruncatemacro{\flprev}{\fli-1}
      \ifnum\fli=1
        \node[flblk, fill=\flcur, minimum height=18pt,
              minimum width=0.7\textwidth] (fn1) at (0,0) {\flx};
      \else
        \node[flblk, fill=\flcur, minimum height=18pt,
              minimum width=0.7\textwidth, below=8pt of fn\flprev] (fn\fli) {\flx};
      \fi
    }%
    \foreach \flx [count=\fli] in {#2} {
      \ifnum\fli>1
        \pgfmathtruncatemacro{\flprev}{\fli-1}
        \draw[flarr, draw=\flmain!70!black] (fn\flprev.south) -- (fn\fli.north);
      \fi
    }%
  \end{tikzpicture}%
}}

%% ================== 3. 循环图 ==================
\NewDocumentCommand \flatcycle { O{oucblue} m }{{%
  \flcheckitems{#2}\flcount{#2}\flcolcount{#1}\flsetmain{#1}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathsetmacro{\flang}{90-360/\flcntval*(\fli-1)}
      \node[circle, fill=\flcur, text=white, align=center, inner sep=1pt,
            minimum size=32pt, font=\footnotesize] (cn\fli) at (\flang:34pt) {\flx};
    }%
    \foreach \flx [count=\fli] in {#2} {
      \pgfmathtruncatemacro{\flnext}{mod(\fli,\flcntval)+1}
      \draw[flarr, draw=\flmain!50!black] (cn\fli) to[bend left=20] (cn\flnext);
    }%
  \end{tikzpicture}%
}}

%% ================== 4. 中心辐射 ==================
%% \flathub[颜色列表]{中心文字}{环绕1, 环绕2, ...}
\NewDocumentCommand \flathub { O{oucblue} m m }{{%
  \flcheckitems{#3}\flcount{#3}\flcolcount{#1}\flsetmain{#1}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#3} {
      \flpick{#1}{\fli+1}%             % 环绕从颜色列表第 2 项起取色
      \pgfmathsetmacro{\flang}{90-360/\flcntval*(\fli-1)}
      \node[rectangle, rounded corners=2pt, draw=\flcur!30!white, line width=0.6pt,
            fill=\flcur!7!white, text=\flcur!55!black, align=center, inner sep=3pt,
            font=\footnotesize, minimum height=17pt] (ln\fli) at (\flang:3.1cm) {\flx};
      \draw[draw=\flcur!40!white, line width=0.7pt] (0,0) -- (ln\fli);
    }%
    \flsetmain{#1}%
    \node[circle, fill=\flmain, text=white, align=center, inner sep=2pt,
          minimum size=40pt, font=\small\bfseries] at (0,0) {#2};
  \end{tikzpicture}%
}}

%% ================== 5. 阶梯递进 ==================
\NewDocumentCommand \flatsteps { O{oucblue} m }{{%
  \flcheckitems{#2}\flcolcount{#1}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathsetlengthmacro{\flsx}{(\fli-1)*2.6cm}
      \pgfmathsetlengthmacro{\flsy}{(\fli-1)*13pt}
      \node[flblk, fill=\flcur, minimum height=16pt, minimum width=2.4cm,
            anchor=south west] at (\flsx,\flsy) {\flx};
    }%
  \end{tikzpicture}%
}}

%% ================== 6. 时间轴 ==================
%% \flattime[颜色列表]{年份列表}{事件列表}
\NewDocumentCommand \flattime { O{oucblue} m m }{{%
  \flcheckitems{#2}\flcheckitems{#3}\flcount{#2}\flcolcount{#1}\flsetmain{#1}%
  \begin{tikzpicture}
    \pgfmathsetlengthmacro{\flstep}{0.9\textwidth/\flcntval}%
    \draw[line width=1.8pt, draw=\flmain,
          -{Stealth[length=2mm,width=1.6mm]}] (0,0) -- (0.9\textwidth,0);
    \foreach \fly [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathsetlengthmacro{\flxx}{(\fli-0.5)*\flstep}
      \node[circle, fill=\flcur, minimum size=6pt, inner sep=0pt] at (\flxx,0) {};
      \node[rectangle, fill=\flcur, text=white, inner sep=2.5pt,
            font=\footnotesize\bfseries, rounded corners=1pt]
            at (\flxx,0.22cm) {\fly};
    }%
    \foreach \fle [count=\fli] in {#3} {
      \flpick{#1}{\fli}%
      \pgfmathsetlengthmacro{\flxx}{(\fli-0.5)*\flstep}
      \ifodd\fli
        \node[flblkl, fill=\flcur!7!white, draw=\flcur!25!white, line width=0.5pt,
              text=\flcur!55!black, text width=2.3cm, anchor=south]
              at (\flxx,0.45cm) {\fle};
      \else
        \node[flblkl, fill=\flcur!7!white, draw=\flcur!25!white, line width=0.5pt,
              text=\flcur!55!black, text width=2.3cm, anchor=north]
              at (\flxx,-0.22cm) {\fle};
      \fi
    }%
  \end{tikzpicture}%
}}

%% ================== 7. 四象限 ==================
%% \flatquad[颜色列表]{左上}{右上}{左下}{右下}
\NewDocumentCommand \flatquad { O{oucblue} m m m m }{{%
  \flcolcount{#1}%
  \flpick{#1}{1}\xdef\flcA{\flcur}%
  \flpick{#1}{2}\xdef\flcB{\flcur}%
  \flpick{#1}{3}\xdef\flcC{\flcur}%
  \flpick{#1}{4}\xdef\flcD{\flcur}%
  \begin{tikzpicture}
    \node[flblkl, fill=\flcA!8!white, text=\flcA!55!black, text width=4.5cm,
          minimum height=34pt] (q1) at (0,0) {#2};
    \node[flblkl, fill=\flcB!14!white, text=\flcB!55!black, text width=4.5cm,
          minimum height=34pt, right=3pt of q1] (q2) {#3};
    \node[flblkl, fill=\flcC!14!white, text=\flcC!55!black, text width=4.5cm,
          minimum height=34pt, below=3pt of q1] (q3) {#4};
    \node[flblkl, fill=\flcD!8!white, text=\flcD!55!black, text width=4.5cm,
          minimum height=34pt, right=3pt of q3] (q4) {#5};
  \end{tikzpicture}%
}}

%% ================== 8. 金字塔 ==================
%% \flatpyramid[颜色列表]{顶层, 第二层, ...}   （按书写顺序自上而下）
\NewDocumentCommand \flatpyramid { O{oucblue} m }{{%
  \flcheckitems{#2}\flcolcount{#1}%
  \begin{tikzpicture}
    \foreach \flx [count=\fli] in {#2} {
      \flpick{#1}{\fli}%
      \pgfmathsetlengthmacro{\flw}{(1.6+(\fli-1)*1.6)*1cm}
      \pgfmathsetlengthmacro{\flyy}{-(\fli-1)*15.5pt}
      \node[trapezium, trapezium left angle=76, trapezium right angle=104,
            draw=none, fill=\flcur, text=white, align=center,
            inner sep=1pt, minimum height=15pt, minimum width=\flw]
            at (0,\flyy) {\flx};
    }%
  \end{tikzpicture}%
}}

%% ================== 9. 左右对比 ==================
%% \flatcompare[左色][右色]{左标题}{左内容}{右标题}{右内容}
\NewDocumentCommand \flatcompare { O{oucblue} O{oucamber} m m m m }{{%
  \begin{tikzpicture}
    \node[flblk, fill=#1, minimum width=4.7cm, minimum height=19pt] (h1) at (0,0) {#3};
    \node[flblk, fill=#2, minimum width=4.7cm, minimum height=19pt,
          right=8pt of h1] (h2) {#5};
    \node[flblkl, fill=#1!7!white, text=#1!55!black, text width=4.5cm,
          minimum height=54pt, below=3pt of h1] {#4};
    \node[flblkl, fill=#2!7!white, text=#2!55!black, text width=4.5cm,
          minimum height=54pt, below=3pt of h2] {#6};
  \end{tikzpicture}%
}}