栅格布局演示

item1
item2
item3
item4
item5
grid-template-columns
1fr 1fr 1fr
1fr 1fr
grid-template-rows
1fr 1fr
1fr 2fr
【item1】grid-row-start
auto
1
2
3
4
【item1】grid-row-end
auto
1
2
3
4
【item1】grid-column-start
auto
1
2
3
4
【item1】grid-column-end
auto
1
2
3
4