移除/去掉input type=number 上下箭头

<input type="number" ...>

<style>
 /*谷歌*/
 input::-webkit-outer-spin-button,
 input::-webkit-inner-spin-button {
   -webkit-appearance: none;
 }

 /*火狐*/
 input[type="number"]{
   -moz-appearance: textfield;
 }
</style>