HTML5、Select下拉框右边加图标的实现代码(增进用户体验)

<p id="login-p">
 <p class="select-wrapper">
 <select id="selector1">
 <option value="" disabled selected>请选择系统：</option>
 <option value="1">微信-苹果</option>
 <option value="2">微信-安卓</option>
 </select>
 <img src="ossweb-img/arrow.png" alt="" class="arrow" />
 </p>
 <p class="select-wrapper">
 <select id="selector2">
 <option value="" disabled selected>请选择渠道：</option>
 <option value="1">渠道1</option>
 <option value="2">渠道2</option>
 </select>
 <img src="ossweb-img/arrow.png" alt="" class="arrow" />
 </p>
 <p class="select-wrapper">
 <select id="selector3">
 <option value="" disabled selected>请选择大区：</option>
 <option value="1">大区1</option>
 <option value="2">大区2</option>
 </select>
 <img src="ossweb-img/arrow.png" alt="" class="arrow" />
 </p>
 <p class="select-wrapper">
 <select id="selector4">
 <option value="" disabled selected>请选择角色：</option>
 <option value="1">角色1</option>
 <option value="2">角色2</option>
 </select>
 <img src="ossweb-img/arrow.png" alt="" class="arrow" />
 </p>
 <p id="notice">单个帐号只能领取一次奖励</p>
 <img src="ossweb-img/comfire1.png" alt="" id="comfire1"/>
 </p>

@function REM($n){
 @return $n/$REM*1rem;
 }
 #login-p{
 background: url(../ossweb-img/kuang1.png)0 0 no-repeat;
 background-size: 100% 100%;
 width: REM(564);
 height: REM(531);
 margin-left: REM(38);
 .select-wrapper{
 position: relative;
 display: flex;
 justify-content: center;
 align-items: center;
 height: REM(50);
 margin: REM(10) auto;
 padding-top: REM(15);
 &>select{
 width: REM(458);
 height: REM(63);
 padding-left: REM(20);
 border: 1px solid #23282d;
 background: #23282d;
 -webkit-appearance: none;
 color: #92989f;
 font-size: REM(24);
 margin-top: REM(75);
 border-radius: 0;
 z-index:10;
 }
 .arrow{
 position: absolute;
 width: REM(41);
 height: REM(30);
 top: REM(65);
 right: REM(80);
 pointer-events: none;
 z-index:11;
 }
 }
 #notice{
 font-size: REM(20);
 color: #92989f;
 text-align: center;
 margin-top: REM(75);
 }
 #comfire1{
 width: REM(220);
 height: REM(78);
 margin-top: REM(20);
 margin-left: REM(174);
 }
 }