修改placeholder文字颜色

.area_ipt ::-webkit-input-placeholder { /* WebKit browsers */
    color:#258aca;
}
.area_ipt :-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color:#258aca;
}
.area_ipt ::-moz-placeholder { /* Mozilla Firefox 19+ */
    color:#258aca;
}
.area_ipt :-ms-input-placeholder { /* Internet Explorer 10+ */
    color:#258aca;
}