关于CSS

vertical-align: top　　 消除图片间隙

https://www.cnblogs.com/starof/p/4512284.html?utm_source=tuicool&utm_medium=referral

https://www.zhangxinxu.com/wordpress/2010/06/css-vertical-align%E7%9A%84%E6%B7%B1%E5%85%A5%E7%90%86%E8%A7%A3%EF%BC%88%E4%BA%8C%EF%BC%89%E4%B9%8Btext-top%E7%AF%87/