Diagrama de flujo con tikz y cuadros con viñetas y colores descoloridos

Question

¿Cómo creo con tikz (usando xelatex) un diagrama de flujo que contiene cuadros, que tienen un título y hasta cuatro viñetas (excepto el cuadro rojo en el medio)? Me las arreglé para obtener un diagrama de flujo simple con mi humilde conocimiento de tikz, ver más abajo, pero me gustaría que los cuadros desaparecieran su color de fondo hacia el extremo inferior, donde tampoco tendrán borde (en el extremo inferior). ¿Cómo puedo hacer que esto suceda?

Bonificación: ¿cómo logro que el refuerzo inferior alcance su punto máximo hacia la caja del medio?

\documentclass[oneside,a4paper]{article}

\usepackage{tikz, tikzscale} % to use flowchart + to scale
\usetikzlibrary{shapes.geometric,arrows,calc,positioning,decorations.pathreplacing,bending}
\tikzstyle{startstop} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=red!20]
\tikzstyle{process} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=blue!30]
\tikzstyle{process2} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=orange!30]
\tikzstyle{process3} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]
\tikzstyle{arrow} = [thick,->,>=stealth]

\begin{document}
\begin{tikzpicture}[transform shape, node distance=2cm] % mock flow chart

\node (start) [process, align=center] {Title Bla Bla};
\node (pro1) [process, right of=start, align=center, xshift=2cm] {Title Bla Bla};
\node (pro2) [process, right of=pro1, align=center, xshift=2cm] {Title Bla Bla};
\node (pro3) [process2, below of=start, align=center, yshift=-.5cm] {Title Bla Bla};
\node (pro4) [process2, below of=pro1, align=center, yshift=-.5cm] {Title Bla Bla};
\node (pro5) [process2, below of=pro2, yshift=-.5cm] {Title Bla Bla};
\node (main) [startstop, below of=pro4, yshift=-.5cm] {Title Bla Bla};
\node (pro6) [process3, below left=1cm and 1cm of main, align=center] {Title Bla Bla};
\node (pro7) [process3, below of=main, align=center] {Title Bla Bla};
\node (pro8) [process3, below right=1cm and 1cm of main, align=center] {Title Bla Bla};
\node (pro9) [process3, right of=pro8, align=center, xshift=2cm] {Title Bla Bla};

\draw [arrow] (start) -- (pro3);
\draw [arrow] (pro1.south) -- (pro3.north);
\draw [arrow] (pro1.south) -- (pro5.north);
\draw [arrow] (pro2.south) -- (pro5.north);
\draw [arrow] (pro2.south) -- (pro4.north);

\draw[decorate, decoration={brace, mirror, amplitude=10pt, raise=4pt}, yshift=-2cm] (pro3.south west) -- (pro5.south east);
\draw[decorate, decoration={brace, amplitude=10pt, raise=4pt}, yshift=4cm] (pro6.north west) -- (pro9.north east);

\end{tikzpicture}
\end{document}

¡Muchas gracias por adelantado!

Answer 1

Mira, los siguientes MWE ofrecen lo que te gusta obtener:

\documentclass[tikz,
               border=3mm,
               ]{standalone}
\usetikzlibrary{arrows.meta,
                decorations.pathreplacing,
                calligraphy,%had to be after lib. decorations.pathreplacing
                positioning,
                shadows
                }
\usepackage{enumitem}
\setlist{nosep,leftmargin=*}

\begin{document}
    \begin{tikzpicture}[
node distance = 22mm and 11mm,
   box/.style = {shape=rectangle, draw, thin, 
                 minimum height=10mm, text width=32mm, align=center,
                 top color=#1!20, bottom color=#1!80,
                 anchor=south west
                 },
BC/.style args = {#1/#2/#3}{% Braces Calligraphic
        decorate,
        decoration={calligraphic brace, amplitude=6pt,
        raise=#1,
              #2,% for mirroring of brace
        aspect=#3},
        very thick,
        pen colour={gray}
        },
                        ] % mock flow chart
 nodes, first row
\node (start) [box=blue] {\parbox{\hsize}{Title Bla Bla,
                            \begin{itemize}
                        \item   item 1
                        \item   item 2
                        \item   item 3
                            \end{itemize}}};
\node (pro1)  [right=of start.south east,box=blue] {Title Bla Bla,
                            \begin{itemize}
                        \item   item 1
                        \item   item 2
                            \end{itemize}};
\node (pro2)  [right=of pro1.south east,box=blue] {Title Bla Bla,
                            \begin{itemize}
                        \item   item 1
                            \end{itemize}};
% nodes, second row
\node (pro3)  [below=of start.south west,box=orange]    {Title Bla Bla};
\node (pro4)  [right=of pro3.south east,box=orange]     {Title Bla Bla};
\node (pro5)  [right=of pro4.south east,box=orange]     {Title Bla Bla};
% nodes, third row
\node (pro6)  [below=of pro4.south west,box=red,rounded corners] {Title Bla Bla};
% nodes, forth row
\node (pro7)  [below=of pro3.west |- pro6.south,
               box=green]                               {Title Bla Bla};
\node (pro8)  [right=of pro7.south east,box=green]      {Title Bla Bla};
\node (pro9)  [right=of pro8.south east,box=green]      {Title Bla Bla};
\node (pro10) [right=of pro9.south east,box=green]      {Title Bla Bla};
% connections
\draw[-Stealth] (start) edge (pro3)
                (pro1.south)  edge (pro3) (pro1.south)  edge (pro5)
                (pro2.south)  edge (pro4) (pro2.south)  edge (pro5);                
% braces
\draw[BC=2mm/mirror/0.500] (pro3.south west) -- (pro5.south east);
\draw[BC=2mm/      /0.375] (pro7.north west) -- (pro10.north east);
\end{tikzpicture}
\end{document}