<div style="padding:40px;color:#cbccc6"><h1>2x2 矩阵变换</h1><p>网格 + 基向量在线性变换下的形变。</p><div style="padding:20px;background:#0d1017;border-left:3px solid #ffb454"><span class="katex-error" title="ParseError: KaTeX parse error: Expected 'EOF', got '&' at position 18: …begin{pmatrix}a&̲b\\\\c&d\\end{p…" style="color:#cc0000">\\begin{pmatrix}a&b\\\\c&d\\end{pmatrix}</span></div><p style="color:#707a8c">该页面需要 JavaScript 进行交互式可视化。</p></div>