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 }