select 清除默认样式
select{ -webkit-user-select:none; -moz-user-select: none; user-select: none;
border: 0 none; border-radius: 0; outline: none; background: none; appearance: none; -webkit-appearance: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); } select:focus{ border: 0px; box-shadow: 0 0 0px 0px #fff; }
用padding 来设置使文字居中