Unverified50% confidenceFactExact time
外边距折叠发生在三种场景：相邻兄弟元素之间、父元素与第一个/最后一个子元素之间、空块级元素自身的上下margin之间，两个垂直相邻margin会合并为较大值而非叠加
1
Sources
50%
Confidence
Long-term
Relevance
8/16/2026
First Seen
Sources
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