\tikzstyle{m} = [draw=pink, fill=pink!12, very thick,
rectangle, rounded corners=3mm, inner sep=10pt, inner ysep=20pt]
%%%%%%%
\newenvironment{m}[1]{%
\begin{tikzpicture}
\node [m] (box)
\bgroup\setRTL\minipage{0.95\textwidth}\vspace{10pt}%
}{
\endminipage%
\egroup;
\end{tikzpicture}%
}