答案1
由于尚未包含 MWE,以下代码可以作为起点:
\documentclass{article}
\usepackage{tabularx}
\usepackage{hhline}
\usepackage[table]{xcolor}
\begin{document}
\noindent
\begin{tabular}{|l|c||p{9cm}|}
\hhline{--||-}
\rowcolor{gray}\multicolumn{2}{|c||}{\textcolor{white}{aaaaa}} & \textcolor{white}{bbbbb}\\
\hhline{==::=}
1 & some text & \begin{tabularx}{\linewidth}{@{}X|X|X|X@{}} a & b & \cellcolor{lightgray}c & d\end{tabularx}\\
\hhline{--||-}
2 & text & \begin{tabularx}{\linewidth}{@{}X|X|X@{}} a & b & c \end{tabularx}\\
\hhline{--||-}
\end{tabular}
\end{document}