css3-placeholder文字样式

:-moz-placeholder { /* Mozilla Firefox 4 to 18 */

    color: #000; opacity:1; 
}
 
::-moz-placeholder { /* Mozilla Firefox 19+ */
    color: #000;opacity:1;
}
 
input:-ms-input-placeholder{
    color: #000;opacity:1;
}
 
input::-webkit-input-placeholder{
    color: #fff;opacity:1;
}