错误日志：TypeError: ejs:84
    82|             </svg>
    83|             <a href="pros.html?pageSize=6" class="text1">
 >> 84|               <p><%= productDetail.data.classifyName %></p>
    85|             </a>
    86|             <svg t="1783590408048" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"
    87|               p-id="4689" width="24" height="24">

Cannot read properties of undefined (reading 'classifyName')