\setlength{\tabcolsep}{1pt}   % 增加列间距
\renewcommand{\arraystretch}{1.0} % 调整行高
\setlength{\heavyrulewidth}{1pt}   % 顶部/底部线宽
\setlength{\lightrulewidth}{0.5pt} % 中间线宽

\begin{table}[htbp]
\centering
\small % 减小字体大小
\caption{\textbf{Model configuration for basic architecture study.}}
\label{tab:Table.5}
\begin{tabular}{@{}cccc@{}} % 使用@{}消除边距，增加列宽
\toprule
\textbf{Model} & \textbf{\# Params (M)} & \textbf{\# Layers} & \textbf{\# Dimension} \\
\midrule
CNN-1D         & 30  & 20 & 1024 \\
CNN-2D         & 35  & 16 & 768  \\
GRU            & 25  & 4  & 512  \\
Transformer    & 20  & 8  & 512  \\
PatchTST       & 20  & 8  & 512  \\
iTransformer   & 20  & 8  & 512  \\
CNN-GRU        & 34  & 16 & 512  \\
CNN-Transformer & 32 & 20 & 768  \\
CNN-Transformer v2 & 36 & 20 & 1024 \\
\bottomrule
\end{tabular}
\end{table}