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针对这个issue出现的bug,经过本地测试并没有复现,最后初步定位在一些浏览器的不兼容问题上。而在此处只需要对CSS用户样式表进行调整,添加了一些对浏览器向下兼容的样式控制。但只给出了IE7以下的调整,对于用户不同浏览器的使用体验需要做出具体情况具体分析的考虑。