Some Structure About CSS
- Layout
- Position,Layer[层次]
- Box Model
- Visual Formatting Model
- BFC[block formatting content],IFC[inline formatting content]
- Style of Format
- Text
- Image
- Link
- Form
- Table
- CSS Reset
Link for some node of some Structure
1.1 Position,Layer: CSS z-index 属性的使用方法和层级树的概念
About something that's causing the problem
BFC or other 描述问题: 某个元素包含一个子元素,子元素设置顶部负外边距,父元素随子元素向上偏移