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摘要：https://www.yuque.com/zaotalk/posts/vu3k13 https://www.yuque.com/zaotalk/posts/acyrua https://www.yuque.com/zaotalk/posts/gtgf26 https://zhuanlan.zhih 阅读全文

摘要：在没有给border设置颜色时，border的颜色会取到元素本身的color属性值，既 currentColor https://www.thinbug.com/q/34667409 阅读全文

摘要：https://zhuanlan.zhihu.com/p/158696334 https://blog.csdn.net/qq_25687271/article/details/107962043 阅读全文