溢出隐藏

/* 1行溢出隐藏 */
overflow: hidden;
text-overflow: ellipsis; 
white-space: nowrap;

/* 2行溢出隐藏 */
display: -webkit-box;
overflow: hidden;
text-overflow: ellipsis;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
-webkit-line-clamp: 2;