如何确保垂直线显示在表格的灰色单元格中？

Question

如何确保垂直线显示在表格的灰色单元格中？

\begin{table}[ht!]
    \renewcommand{\arraystretch}{1}
    \normalsize
    \doublespacing
    \centering
        \caption{Interaction between \emph{Import Industry} and \emph{Neutral Sentiment}.}
        \begin{tabular}{|c|c|c|c|}
    \hline
        & DV=\emph{Bad Self Impact} &  DV=\emph{Bad US Impact} &  DV=\emph{Tariff Support}\\ \hline
    \emph{Import Industry} &  0.119  & 0.002  & 0.250  \\
     & (0.342)   & (0.985) & (0.011)\\  \hline
    \emph{Neutral Sentiment} & 0.045 & -0.008 & -0.064 \\
     & (0.688) &  (0.942) & (0.481)\\ \hline
     \cellcolor[gray]{0.8}\emph{Import Industry*} & \cellcolor[gray]{0.8}0.470 & \cellcolor[gray]{0.8}0.500 & 0.267\\
     \cellcolor[gray]{0.8}\emph{Neutral Sentiment} & \cellcolor[gray]{0.8}{0.024} & \cellcolor[gray]{0.8}{0.014} & 0.130\\ \hline
    \end{tabular}\\
    \end{table}