单行溢出:
overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
两行溢出
display: box;
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 2;
overflow: hidden;
三行溢出
display: box;
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 3;
overflow: hidden;