摘要： @baseColor: red;@switch: light; //dark// according the first param to call class. .mixin (dark, @color) { color: darken(@color, 10%);}.mixin (light, @color) { color: @color;}.mixin (@_, @color) { display: block;}//end//Guards begin// can used > >= = = .guards (@a) when (@a){} or .guards (@... 阅读全文