vue 动态绑定style样式

//html 
<div class="service">
    <a :href="'tel:' + storetel" :style="serverimg"></a>
    <img src="../assets/service.png" alt="暂无图片" class="service-img">
 </div>


//js
 storetel:'',
 serverimg: {
     display: 'block',
     backgroundImage: "url(" + require('../assets/service.png') + ")",
     backgroundRepeat: "no-repeat",
     backgroundSize: "content",
     marginTop: "5px",
     width: "88px",
     height: "73px",
     marginLeft: "40px"
 },