[&:first-child]:overflow-hidden [&:first-child]:max-h-full"
have a heap allocation.
，详情可参考搜狗输入法2026
// 易错点3：处理最终结果为空的场景（比如num="10"，k=2）
Age verification checks are now in force in the UK because of the Online Safety Act, but with the Discord fallout, it seems like one bad idea after another
需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。