diff --git a/src/views/commodity-detail/components/shopping-cart.vue b/src/views/commodity-detail/components/shopping-cart.vue
index 5d6f4e1..5f15557 100644
--- a/src/views/commodity-detail/components/shopping-cart.vue
+++ b/src/views/commodity-detail/components/shopping-cart.vue
@@ -67,6 +67,7 @@ const categoryOrder = ref<string[]>([]) // 类目
 const curSelection = ref<Record<string, string>>({})
 const curPageData = ref({ price: 0, imageUrl: '', num: 0 })
 const formData = ref({ skuId: NaN, num: 1 })
+const skuSelectionList = ref<Array<{ selection: Record<string, string>; stock: number }>>([])
 
 // 设置pathset
 const buildSignature = (order: string[], selection: Record<string, string>) => order.map((name) => `${name}:${selection[name] ?? ''}`).join('|')
@@ -89,8 +90,13 @@ const updateOptionDisabled = () => {
   Object.entries(skuData.value).forEach(([categoryName, options]) => {
     options.forEach((opt) => {
       const trialSelection = { ...curSelection.value, [categoryName]: opt.label }
-      const match = commodityData.value[buildSignature(categoryOrder.value, trialSelection)]
-      opt.disabled = !match || (match.num ?? 0) <= 0
+      const availableStock = skuSelectionList.value
+        .filter(({ selection }) =>
+          categoryOrder.value.every((name) => !trialSelection[name] || selection[name] === trialSelection[name]),
+        )
+        .reduce((sum, sku) => sum + sku.stock, 0)
+      opt.num = availableStock
+      opt.disabled = availableStock <= 0
     })
   })
 }
@@ -102,6 +108,7 @@ const handleGetSkuList = (list: SkuType[]) => {
   const order = list[0]?.vvSkuPropertyValueList?.map((vv) => vv.productPropertyName) || []
   categoryOrder.value = order
   let firstSelection: Record<string, string> = {}
+  const selectionList: Array<{ selection: Record<string, string>; stock: number }> = []
 
   list.forEach((sku, index) => {
     // 第一次默认选择
@@ -122,28 +129,30 @@ const handleGetSkuList = (list: SkuType[]) => {
       price: sku.promotionPrice,
       num: sku.stock,
     }
+    selectionList.push({ selection, stock: sku.stock })
 
     // 生成展示的数组
-    sku.vvSkuPropertyValueList.forEach((vv, idx) => {
+    sku.vvSkuPropertyValueList.forEach((vv) => {
       if (!result[vv.productPropertyName]) result[vv.productPropertyName] = []
       const bucket = result[vv.productPropertyName]
       const sid = buildOptionSid(vv)
       const existing = bucket.find((item) => item.sid === sid)
-      const isLeafProperty = idx === order.length - 1
       if (existing) {
         // 非叶子类目需要展示该类目下所有 SKU 的累计库存；叶子类目保持当前 SKU 库存
-        existing.num = isLeafProperty ? sku.stock : existing.num + sku.stock
+        existing.num += sku.stock
       } else {
         bucket.push({
           sid,
           label: vv.productPropertyValue,
           num: sku.stock,
-          disabled: isLeafProperty ? sku.stock <= 0 : false,
+          disabled: false,
         })
       }
     })
   })
 
+  skuSelectionList.value = selectionList
+
   return { result, commodityMap, firstSelection }
 }