点阵背景

Create a dark section with an animated dot grid background. Dots should be arranged in a regular grid, dim by default, and brighten slightly in a radius around the cursor. Add a radial vignette so edges fade to black. Use CSS radial gradients and mask, or a lightweight canvas/SVG approach. Use Tailwind CSS. Center a headline over the grid.

创建一个带动画点阵背景的深色区域。点以规则网格排列，默认暗淡，光标周围半径内轻微变亮。添加径向暗角使边缘淡出至黑色。使用 CSS 径向渐变和遮罩，或轻量 canvas/SVG 方案。使用 Tailwind CSS。在网格上方居中放置标题。