栅格布局演示

item1
item2
item3
item4
item5
grid-template-columns
none
50px 80px
grid-template-rows
none
40px 80px 40px
justify-content
normal
start
end
center
stretch
baseline
space-around
space-between
space-evenly
align-content
normal
start
end
center
stretch
baseline
space-around
space-between
space-evenly