[1.1 基础选择器](1.%E5%9F%BA%E7%A1%80%E9%80%89%E6%8B%A9%E5%99%A8.md) [1.2 伪类](1.2%E4%BC%AA%E7%B1%BB.md) [1.3 first-child与:first-of-type的区别](1.3first-child%E4%B8%8Efirst-of-type%E7%9A%84%E5%8C%BA%E5%88%AB.md) [1.4 nth-child(:not())与nth-of-type(:not())](1.4nth-child%E4%B8%8Enth-of-type.md) [1.5 属性选择器](1.5%E5%B1%9E%E6%80%A7%E9%80%89%E6%8B%A9%E5%99%A8.md)