课程
/前端开发
/Sass/Less
/less即学即用
还要学ps啊，都不会ps怎么操作？呜呜，我是做后台的，真是一堆前端
2017-12-20
源自：less即学即用 3-2
正在回答
你那样写会得到一个空值，所以是NAN
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举报
让您理解less与css的关系与作用，并且结合实际的例子深刻理解
