vue 动态修改 css

<div v-for="i in resultDate" v-if="i.ProjectId>='4'" @click=EveyTesttInfo(i.Name,i.ProjectId)>
        <img v-bind:src="i.ProjectId | formatIconImg">
        <p>{{i.Name}}<br> {{i.Result|formatNull}} {{i.ProjectId|formatUnit}}</p>
        <span style="color:#d55e36" v-if="i.Rank==1">{{i.Rank|formatRank}}</span>
        <span style="color:#01a89e" v-else>{{i.Rank|formatRank}}</span>
 </div><div v-for="i in resultDate" v-if="i.ProjectId>