【CSS3】Advanced3：Universal, Child, and Adjacent Selectors

1.Universal selectors

eg:#target*{ }　

2.Child selectors <

something immediately nested within something直接子女，不包括子孙

3.Adjacent Selector +

something immediately following something 直接跟在后面的第一个跟屁虫

CSS3：h1 ~ p { font-weight: bold } will style all paragraphs after the top-level heading but if there were any ps preceding the h1, these would not be affected.