--------------General Precautions----------------------
1. Web design should first clear the browser's default style
{
padding: 0;
margin:0;
}
--------------Field Styles-------------------------
1.text-shadow text shadow
2. border-radius rounded corners
3. border-image border image
4.box-shadow box shadow
5.first-line matches the first line of text
6.first-letter matches the first character
7.E[foo^="bar"] prefix
8.E[foo$="bar"] suffix
9. E[foo*="bar"] wildcard
10. E:nth-child(n)/(odd)/(even) matches the first/odd/even elements
11.table-layout table layout, the default is automatic, usually fixed
12.empty-cells Whether to hide the border and background of empty cells, the default is shou
13.border-collapse sets the merged border model for the table, it is recommended to collapse
14.E: enabled/disabled/checked style when not in use
15.list-style-type set different list styles
16.vertical-align defines the vertical alignment of the text
17.text-indent defines the indentation of the first line of text
18.line-height defines the text line height
19.font-stretch defines whether to stretch the deformed font horizontally
20.text-overflow defines how omitted text is handled
21.word-wrap defines whether to break the newline when the text exceeds the boundary
22.box-orient defines the flow layout direction inside the box
23.resize free zoom effect
24. Outline when the outline element is activated
25.content sets the content of the element
26.columns define multi-column layout
27.columns-gap border for multi-column layout
28.transform animation effect
29.rotate() rotation animation
30.scale() zoom animation
31.translate() moving animation
32.skew() tilt function
33.matrix() matrix deformation animation
34.transform-originCSS deformation origin, the default center point
35.transition-duration animation transition time
36. animation CSS animation
37.animation-name animation name
38. animation-duration animation time
39.animation-timing-function animation playback method
40. animation-delay animation start time
41. animation-iteration-count Number of animation plays
42.animation-direction animation playback direction