/*改变textarea的placeholder默认颜色*/textarea::-webkit-input-placeholder {  color: @background_gray;}textarea:-moz-placeholder {  color: @background_gray;}textarea::-moz-placeholder {  color: @background_gray;}textarea:-ms-input-placeholder {  color: @background_gray;}

参考网址:https://segmentfault.com/q/1010000000397925