Appearance
place-content
class名
样式值
place-content-center
place-content: center;
place-content-start
place-content: start;
place-content-end
place-content: end;
place-content-between
place-content: space-between;
place-content-around
place-content: space-around;
place-content-evenly
place-content: space-evenly;
place-content-baseline
place-content: baseline;
place-content-stretch
place-content: stretch;