小程序如何改变元素的样式

let that = this
const query = wx.createSelectorQuery()
query.select('.detail-card').boundingClientRect()
query.select('.detail-header').boundingClientRect()
query.exec((res => {
    that.setData({
        cardHeight: res[0].height,
        headerHeight: res[1].height
    })
}))

<view 
    class="detail-card" 
    style="top:{{topList[index]+'px'}};z-index:{{index}}" 
    id="{{'card'+index}}" 
    wx:for="{{people}}" 
    wx:key="{{index}}" 
    catchtap="cardClick"
>
</view>