<view class="min-h-screen bg-gray-100 flex flex-col"><view class="fixed bottom-0 left-0 right-0 z-10 bg-white shadow p-4"><view class="flex flex-wrap"><button wx:for="{{a}}" wx:for-item="cat" wx:key="b" class="bg-blue-500 text-white text-sm px-4 py-2 rounded m-1" bindtap="{{cat.c}}">{{cat.a}}</button></view></view><view class="flex-1 px-4 pb-20 h-80"><view wx:if="{{b}}" class="question-list"><view wx:for="{{c}}" wx:for-item="q" wx:key="b" class="question-item" bindtap="{{q.c}}">{{q.a}}</view><view class="h-2"></view><view wx:for="{{d}}" wx:for-item="msg" wx:key="b" class="{{['chat-message', msg.c]}}">{{msg.a}}</view></view></view></view>
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