改变 input placeholder 颜色

/* 改变 input 颜色 */
.contentSearch{
    color: black!important;
}
.contentSearch input{
    color: black!important;
    background: white!important;
}
.contentSearch input:hover{
    color: black!important;
    background: white!important;
}
.bOMdbY:hover, .bOMdbY:focus, .bOMdbY:active{
    background: white!important;
    color: black!important;

}
/* 改变 input placeholder 颜色 */
input::-webkit-input-placeholder { 
    /* WebKit browsers */ 
    color: #abb4be!important; 
} 
input:-moz-placeholder { 
    /* Mozilla Firefox 4 to 18 */ 
    color: #abb4be!important; 
} 
input::-moz-placeholder { 
    /* Mozilla Firefox 19+ */ 
    color: #abb4be!important; 
} 
input:-ms-input-placeholder { 
    /* Internet Explorer 10+ */ 
    color: #abb4be!important; 
}