第 4 章值和单位 Values and Units

4.1 Keywords, Strings, and Other Text Values

Keywords

Strings

URLs

Images

Identifiers

4.2 Numbers and Percentages

Integers

Numbers

Percentages

Fractions

4.3 Distances

Absolute Length Units

Resolution Units

Relative Length Units

4.4 Calculation values

4.5 Attribute Values

4.6 Color

Named Colors

Colors by RGB and RGBa

Colors by HSL and HSLa

Color Keywords

4.7 Angles

4.8 Time and Frequency

4.9 Position

4.10 Custom Values