template
<div>
<ul class="offic_product_article">
<li class="offic_product_article_li" @click="tabId=0">智牧后台管理系统</li>
<li class="offic_product_article_li" @click="tabId=1">智牧项圈</li>
<li class="offic_product_article_li" @click="tabId=2">挤奶机</li>
<li class="offic_product_article_li" @click="tabId=3">旧设备智能升级</li>
</ul>
<div class="offic_product_con_one" v-if="tabId===0"></div>
<div class="offic_product_con_three" v-if="tabId===1"></div>
<div class="offic_product_con_three" v-if="tabId===2"></div>
<div class="offic_product_con_four" v-if="tabId===3"></div>
</div>
data
tabId:0,