单行
overflow: hidden;
text-overflow:ellipsis;
white-space: nowrap;
多行
display: -webkit-box;
-webkit-box-orient: vertical;
-webkit-line-clamp: 3; //3行
overflow: hidden;
p{position: relative; line-height: 20px; max-height: 40px;overflow: hidden;}
p::after{content: "..."; position: absolute; bottom: 0; right: 0; padding-left: 40px;
background: -webkit-linear-gradient(left, transparent, #fff 55%);
background: -o-linear-gradient(right, transparent, #fff 55%);
background: -moz-linear-gradient(right, transparent, #fff 55%);
background: linear-gradient(to right, transparent, #fff 55%);}
CSS控制文字，超出部分显示省略号
原文：https://www.cnblogs.com/teoh/p/11977329.html
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