    \caption{Comparison of document understanding approaches across key capabilities. Our method is the only one supporting all features while maintaining competitive parameter count and training cost. $\checkmark$ = supported, $\times$ = not supported.}
    \small
    \begin{tabular}{lccccccc}
        Method & Long-Context & Sparse & Structure-Aware & Sub-Quadratic & Multi-Gran. & Load-Balanced & Cross-Doc \\
        BERT-base & $\times$ & $\times$ & $\times$ & $\times$ & $\times$ & N/A & $\times$ \\
        Longformer & $\checkmark$ & $\times$ & $\times$ & $\checkmark$ & $\times$ & N/A & $\times$ \\
        Switch Trans. & $\times$ & $\checkmark$ & $\times$ & $\times$ & $\times$ & $\checkmark$ & $\times$ \\
        LayoutLMv2 & $\times$ & $\times$ & $\checkmark$ & $\times$ & $\checkmark$ & N/A & $\times$ \\
        \textbf{Ours} & $\checkmark$ & $\checkmark$ & $\checkmark$ & $\checkmark$ & $\checkmark$ & $\checkmark$ & $\checkmark$ \\
