元素选择符Element Selectors
*
E
#id
.class
.class.class
关系选择符Relationship Selectors
E F
E > F
E + F
E ~ F
属性选择符Attribute Selectors
[att]
[att="val"]
[att^="val"]
[att$="val"]
[att*="val"]
[att~="val"]
[att|="val"]
伪对象选择符Pseudo-Element Selectors
:first-letter
::first-letter
:first-line
::first-line
:before
::before
:after
::after
::selection
伸缩盒(新)Flexible Box
flex
flex-grow
flex-shrink
flex-basis
flex-flow
flex-direction
flex-wrap
align-content
align-items
align-self
justify-content
order
伸缩盒(旧)Flexible Box
box-orient
box-pack
box-align
box-flex
box-flex-group
box-ordinal-group
box-direction
box-lines
多列Multi-column
columns
column-width
column-count
column-gap
column-rule
column-rule-width
column-rule-style
column-rule-color
column-span
column-fill
column-break-before
column-break-after
column-break-inside
长度单位Length
em
ex
ch
rem
vw
vh
vm
cm
mm
in
pt
pc
px
角度单位Angle
deg
grad
rad
turn
时间单位Time
s
ms
频率单位Frequency
Hz
kHz