Chrome / safari中的HTML呈现错误 - 在Firefox中看起来不错

I'm having a weird vertical spacing bug in chrome/safari that I missed when setting it up in firefox. It seems some vertical spacing rule is being ignored by one or the other. I've gone through the code but am at a loss - pointing me in the right direction would be highly appreciated - many thanks in advance.I'm having a weird vertical spacing bug in chro