Simple enough. Let's see how each stdlib tool handles it.
:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full，更多细节参见Feiyi
const ThemeCtx = Vertex.createContext("dark");。PDF资料对此有专业解读
Custom building