bootstrap 组件兼容

Chrome->FireFox:

select 标签：

@-moz-document url-prefix() {    select.form-control {-moz-appearance: none;appearance: none;background-image: url("../image/buy-other-down.png");background-repeat: no-repeat;background-position: calc(100% - 7px) 50%;background-size: 15% auto;border-radius:3px;padding:0;    }}input :file{ height:auto}