错误日志：TypeError: ejs:56
    54|                 <a href="pros.html?pageSize=8"><%= language.proTitle %></a>
    55|                 <i class="el-icon-arrow-right"></i>
 >> 56|                 <a href="pros.html?pageSize=8&productClassifyId=<%= productDetail.data.productClassifyId %>" class="pro-detail-index-name-title"><%= (productDetail && productDetail.data && productDetail.data.classifyName) ? productDetail.data.classifyName : 'Ferrosilicon' %></a>
    57|                 <i class="el-icon-arrow-right"></i>
    58|                 <a href="pro-detail.html" class="lastA"><%= (productDetail && productDetail.data && productDetail.data.productName) ? productDetail.data.productName : 'Ferrosilicon 75' %></a>
    59|             </div>

Cannot read properties of undefined (reading 'productClassifyId')