diff --git a/pages/product-detail/components/SizeChart.vue b/pages/product-detail/components/SizeChart.vue
index 00bc921..f114a7f 100644
--- a/pages/product-detail/components/SizeChart.vue
+++ b/pages/product-detail/components/SizeChart.vue
@@ -1,5 +1,5 @@
 <template>
-  <!-- 产品尺码表：5 列 × 4 行，交替行背景 -->
+  <!-- 产品尺码表：列数由后端 columns 动态决定（首列固定"尺码"），交替行背景 -->
   <view class="chart-wrap">
     <view class="header-row">
       <text class="title">产品尺码</text>
@@ -8,13 +8,10 @@
     </view>
 
     <view class="table">
-      <!-- 表头：bg #DFDFDF，圆角 6px -->
+      <!-- 表头：首列固定"尺码"，其余列名来自后端 columns -->
       <view class="row header">
-        <text
-          class="cell"
-          v-for="(col, index) in data.columns"
-          :key="index"
-        >{{ col }}</text>
+        <text class="cell">尺码</text>
+        <text class="cell" v-for="col in data.columns" :key="col.key">{{ col.name }}</text>
       </view>
 
       <!-- 数据行：偶数行（第 2、4 行）bg #F7F7F7，圆角 6px -->
@@ -25,10 +22,7 @@
         :key="index"
       >
         <text class="cell">{{ row.size }}</text>
-        <text class="cell">{{ row.shoulder }}</text>
-        <text class="cell">{{ row.chest }}</text>
-        <text class="cell">{{ row.length }}</text>
-        <text class="cell">{{ row.sleeve }}</text>
+        <text class="cell" v-for="col in data.columns" :key="col.key">{{ (row.cells && row.cells[col.key]) || '' }}</text>
       </view>
     </view>
   </view>
diff --git a/pages/product-detail/product-detail.vue b/pages/product-detail/product-detail.vue
index d908d0e..a3416ce 100644
--- a/pages/product-detail/product-detail.vue
+++ b/pages/product-detail/product-detail.vue
@@ -342,26 +342,33 @@ export default {
     },
 
     /**
-     * 构造尺码表：接口 measurements.key (chest/bodyLength/shoulder/sleeveLength) → 表格列
+     * 构造尺码表：完全由后端 rows/columns 驱动
+     * columns 为除"尺码"外每列的表头；rows.measurements 按 key 取值
+     * 格式异常时返回空对象，页面不渲染该模块（兜底不报错）
      */
     buildSizeChart(sizeChart) {
-      if (!sizeChart || !sizeChart.rows || !sizeChart.rows.length) return {}
-      const columns = ['尺码', '肩宽', '胸围', '衣长', '袖长']
-      const rows = sizeChart.rows.map((row) => {
-        const measurements = row.measurements || []
-        const get = (key) => {
-          const m = measurements.find((x) => x.key === key)
-          return m ? m.cm : ''
-        }
-        return {
-          size: row.sizeName || '',
-          shoulder: get('shoulder'),
-          chest: get('chest'),
-          length: get('bodyLength'),
-          sleeve: get('sleeveLength')
-        }
-      })
-      return { unit: 'cm', columns, rows }
+      if (!sizeChart || !Array.isArray(sizeChart.rows) || !sizeChart.rows.length) return {}
+      if (!Array.isArray(sizeChart.columns)) return {}
+      // 列定义兜底：必须有 key（取值用），name 缺失时用 key 代替
+      const columns = sizeChart.columns
+        .filter((c) => c && typeof c.key === 'string' && c.key)
+        .map((c) => ({ key: c.key, name: typeof c.name === 'string' && c.name ? c.name : c.key }))
+      if (!columns.length) return {}
+
+      const rows = sizeChart.rows
+        .filter((r) => r && typeof r.sizeName === 'string' && r.sizeName)
+        .map((row) => {
+          const measurements = Array.isArray(row.measurements) ? row.measurements : []
+          const cells = {}
+          columns.forEach((col) => {
+            const m = measurements.find((x) => x && x.key === col.key)
+            const val = m ? (m.cm != null ? m.cm : m.in) : ''
+            cells[col.key] = val == null ? '' : String(val)
+          })
+          return { size: row.sizeName, cells }
+        })
+      if (!rows.length) return {}
+      return { columns, rows }
     },
 
     /**