可以让网页容器滚动停止的时候，自动平滑定位到指定元素的指定位置
/* 关键值 */
scroll-snap-type: none;
scroll-snap-type: x;
scroll-snap-type: y;
scroll-snap-type: block;
scroll-snap-type: inline;
scroll-snap-type: both;
/* 可选 mandatory | proximity*/
scroll-snap-type: x mandatory;
scroll-snap-type: y proximity;
scroll-snap-type: both mandatory;
/* etc */
/* 全局值 */
scroll-snap-type: inherit;
scroll-snap-type: initial;
scroll-snap-type: unset;