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将行高设置为没有单位的小数似乎可以解决问题:
jsFiddle
small { font-size: 0.8125rem; line-height: 1.75; }
设置display:block似乎也解决了这个问题,但这显然不是一个理想的解决方案。
display:block
small { font-size: 0.8125rem; display:block; }