inputplaceholder css样式 One'_

::-webkit-input-placeholder { /* Chrome/Opera/Safari */
  color: #00648a;
  opacity: .8;
  font-size: 12px;
}

::-moz-placeholder { /* Firefox 19+ */
  color: #00648a;
  opacity: .8;
  font-size: 12px;
}  

:-moz-placeholder { /* Firefox 19+ */
  color: #00648a;
  opacity: .8;
  font-size: 12px;
}  

:-ms-input-placeholder { /* IE 10+ */
  color: #00648a;
  opacity: .8;
  font-size: 12px;
}