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:first-child]:h-full [&:first-child]:w-full [&:first-child]:mb-0 [&:first-child]:rounded-[inherit] h-full w-full
。关于这个话题，Line官方版本下载提供了深入分析
RPL CPL (outer ring)
block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.