Tikz：在嵌套节点中对齐文本

Question

以下代码：

\documentclass[tikz, border=1mm]{standalone}

\usepackage{tikz}
\usetikzlibrary{backgrounds, positioning, fit}
\begin{document}

\newcommand{\boxdist}{3cm}
\newcommand{\textwdh}{2cm}

\begin{tikzpicture}[
    box/.style={rectangle, rounded corners, draw=black, text width=15mm},
    ]
    \node (A) [text width=\textwdh] 
    {Blaaaaaa bbbbbbbb \newline Some text text text text};
    \node (B) [right= \boxdist of A.west, text width=\textwdh] {More text text text};
    \node (C) [right= \boxdist of B.west, text width=\textwdh] {Even more text test};
    \node (D) [right= \boxdist of C.west, text width=\textwdh] {And even more text};

    \begin{scope}[on background layer]
        \node [box, inner sep=11mm, fill=black!40, fit={(A) (B) (C) (D)}] {};
    \end{scope}

    \begin{scope}[on background layer]
        \node [box, inner sep=9mm, fill=black!30, fit={(B) (C) (D)}] {};
    \end{scope}

    \begin{scope}[on background layer]
        \node [box, inner sep=7mm, fill=black!20, fit={(C) (D)}] {};
    \end{scope}

    \begin{scope}[on background layer]
        \node [box, inner sep=5mm, fill=black!10, fit={(D)}] {};
    \end{scope}

\end{tikzpicture}

\end{document}

产生以下输出：

我希望每个框中的文本从左上角开始。我还希望所有框中的文本宽度相同。我该怎么做？

Answer 1

像这样？

\documentclass[tikz, border=3mm]{standalone}
\usetikzlibrary{backgrounds, fit, positioning}

\begin{document}
    \begin{tikzpicture}[
  node distance = 4pt and 4pt,
     box/.style = {rectangle, inner sep=0pt, text width=21mm},
FIT/.style args = {#1/#2}{rectangle, rounded corners, draw, semithick,
                    fill=gray!#1, inner sep=2pt, fit=#2,
                    node contents={}}
                        ]
\node (A) [box] {Blaaaaaa bbbbbbbb Some text text text text};
\node (B) [box, below right=of A.north east] {More text text text};
\node (C) [box, below right=of B.north east] {Even more text test};
\node (D) [box, below right=of C.north east] {And even more text\\~};
%
\begin{scope}[on background layer]
\node (d) [FIT=0/(D)];
\node (c) [FIT=0/(C) (d)];
\node (b) [FIT=0/(B) (c)];
\node (a) [FIT=0/(A) (b)];
%
\node [FIT=60/(a)];
\node [FIT=40/(b)];
\node [FIT=20/(c)];
\node [FIT=10/(d)];
\end{scope}
    \end{tikzpicture}
\end{document}

附录： 节点中的文本垂直居中的情况（如您在评论中所要求的那样）：

\documentclass[tikz, border=3mm]{standalone}
\usetikzlibrary{backgrounds, fit, positioning}

\begin{document}
    \begin{tikzpicture}[
  node distance = 4pt and 4pt,
     box/.style = {rectangle, inner sep=0pt, text width=21mm},
FIT/.style args = {#1/#2}{rectangle, rounded corners, draw, semithick,
                    fill=gray!#1, inner sep=2pt, fit=#2,
                    node contents={}}
                        ]
\node (A) [box] {Blaaaaaa bbbbbbbb Some text text text text};
\node (B) [box, right=of A] {More text text text};
\node (C) [box, right=of B] {Even more text test};
\node (D) [box, right=of C] {And even more text};
%
\begin{scope}[on background layer]
\node (d) [FIT=0/(D)];
\node (c) [FIT=0/(C) (d)];
\node (b) [FIT=0/(B) (c)];
\node (a) [FIT=0/(A) (b)];
%
\node [FIT=60/(a)];
\node [FIT=40/(b)];
\node [FIT=20/(c)];
\node [FIT=10/(d)];
\end{scope}
    \end{tikzpicture}
\end{document}