非常实用的css

.clearfix:after {content: "";display: block;visibility: hidden;height: 0;clear: both;}
.clearfix {zoom: 1;}
/*清除select的默认样式，添加自己的三角图标*/
select {
	appearance: none;-moz-appearance: none;-webkit-appearance: none;padding-right: 14px;
	background: url(../img/icon-right.png) no-repeat right center transparent;background-size: 8px 14px;
	font-family: "微软雅黑", "microsoft yahei";font-size: 18px;
}
select::-ms-expand {display: none;}
/*强制换行*/
.noline {word-wrap: break-word;word-break: break-all;}
/*不换行，以省略号结束*/
.line {overflow: hidden;text-overflow: ellipsis;white-space: nowrap;word-break: keep-all;font-family: "微软雅黑";}

/*flex盒子*/
.flex_box {display: -webkit-box;display: -webkit-flex;display: -ms-flexbox;display: flex;align-items: center;-webkit-align-items: center;}
.flex1 {-webkit-box-flex: 1;-webkit-flex: 1;-ms-flex: 1;flex: 1;}