css改变placeholder的颜色

/* WebKit, Blink, Edge */
::-webkit-input-placeholder {color:#ccc;}
/* Mozilla Firefox 4 to 18 */
:-moz-placeholder{color:#ccc;}
/* Mozilla Firefox 19+ */
::-moz-placeholder {color:#ccc;}
/* Internet Explorer 10-11 */
:-ms-input-placeholder{color:#ccc;}