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;}