HTML CSS 垂直居中布局

display:flex;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-line-pack:center;justify-content:center;-webkit-box-align:center;-webkit-align-items:center

<div >

<style>

.selectLang {

font-size: 0.15rem;

border: 1px solid white;

color: black;

margin: 0 0.5rem 0 0.5rem;

}

.selectLang option {

color: black !important;

}

</style>

<select name="SwitchLang" class="selectLang" lay-verify="" style="

display: inline-block;

margin: 0 auto;

">

<option value="zhcn" >简体中文</option>

<option value="zhtw" >繁体中文</option>

<option value="en" >English</option>

<option value="ph" >Philippines</option>

<option value="la" >ເມືອງລາວ</option>

<option value="mas" >Malay</option>

</select>

</div>