.form-control {
    display: block;
    width: 100%;
    height: 38px;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.42857143;
    color: #555;
    background-color: #fff;
    background-image: none;
    border: 1px solid #eaeaea;
    border-radius: 4px;
    -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
    box-shadow: inset 0 1px 1px rgba(0,0,0,.075);
    -webkit-transition: border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;
    -o-transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
    transition: border-color ease-in-out .15s,box-shadow ease-in-out .15s;
}

/* IE浏览器下隐藏下拉按钮 */
select::-ms-expand {
    display: none;
}

/* 定义隐藏下拉框默认样式及图片覆盖下拉按钮 */
.info-select {
    width: 200px;
    outline: none;
    appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
    -ms-appearance: none;
    background: url(../img/icon_arrow_down_x2.png) no-repeat scroll right center transparent;
    float: left;
    margin-right: 16px;
    padding-right: 46px;
    cursor:pointer;
}
::placeholder {
        color: #ccc;
    }