<view class="item-view-root">
    <text class="item-view-amount-title">{{item.promotion}}</text>

    <text tt:if="{{id == 'realamount'}}" class="item-view-amount-text1 redText">{{item.promotion_amount}}</text>
    <text tt:else class="item-view-amount-text1">{{item.promotion_amount}}</text>
</view>