diff --git a/api/appUser.js b/api/appUser.js
index e9f7715..b8525dd 100755
--- a/api/appUser.js
+++ b/api/appUser.js
@@ -154,6 +154,10 @@ export function requestShipping(user_id, ids, address_id) {
   return authRequest({ url: `/api/app/users/${user_id}/inventory/request-shipping`, method: 'POST', data })
 }
 
+export function checkShippingFee(user_id, ids) {
+  return authRequest({ url: `/api/app/users/${user_id}/inventory/shipping-fee/check`, method: 'POST', data: { inventory_ids: ids } })
+}
+
 export function createShippingFeeOrder(user_id, ids) {
   return authRequest({ url: `/api/app/users/${user_id}/inventory/shipping-fee/preorder`, method: 'POST', data: { inventory_ids: ids } })
 }
diff --git a/api/synthesis.js b/api/synthesis.js
index 0ba3f93..f6e08c2 100644
--- a/api/synthesis.js
+++ b/api/synthesis.js
@@ -8,6 +8,10 @@ export function doSynthesis(userId, recipeId) {
   return authRequest({ url: `/api/app/users/${userId}/synthesis/do`, method: 'POST', data: { recipe_id: recipeId } })
 }
 
+export function doBatchSynthesis(userId, recipeId) {
+  return authRequest({ url: `/api/app/users/${userId}/synthesis/do-batch`, method: 'POST', data: { recipe_id: recipeId } })
+}
+
 export function getSynthesisLogs(userId, page = 1, pageSize = 20) {
   return authRequest({ url: `/api/app/users/${userId}/synthesis/logs`, method: 'GET', data: { page, page_size: pageSize } })
 }
diff --git a/pages-user/synthesis/index.vue b/pages-user/synthesis/index.vue
index ba2062e..448655d 100644
--- a/pages-user/synthesis/index.vue
+++ b/pages-user/synthesis/index.vue
@@ -93,16 +93,30 @@
 
             <!-- 底部：进度 + 按钮 -->
             <view class="ticket-footer">
-              <text class="ready-hint">
-                {{ getReadyCount(recipe) }}/{{ recipe.materials?.length || 0 }} 材料就绪
-              </text>
-              <view
-                class="synth-btn"
-                :class="recipe.can_synthesize ? 'btn-ready' : 'btn-locked'"
-                @tap="onSynthesize(recipe)"
-              >
-                <text class="btn-text">{{ synthesizing ? '合成中' : (recipe.can_synthesize ? '合成' : '不足') }}</text>
-                <view v-if="recipe.can_synthesize" class="btn-shine"></view>
+              <view class="ready-meta">
+                <text class="ready-hint">
+                  {{ getReadyCount(recipe) }}/{{ recipe.materials?.length || 0 }} 材料就绪
+                </text>
+                <text class="batch-hint" v-if="getMaxSynthesizeCount(recipe) > 0">
+                  最多可合成 {{ getMaxSynthesizeCount(recipe) }} 次
+                </text>
+              </view>
+              <view class="action-group">
+                <view
+                  class="synth-btn synth-btn-secondary"
+                  :class="recipe.can_synthesize && !batchSynthesizing ? 'btn-ready' : 'btn-locked'"
+                  @tap="onSynthesize(recipe)"
+                >
+                  <text class="btn-text">{{ synthesizing ? '合成中' : (recipe.can_synthesize ? '单次合成' : '不足') }}</text>
+                </view>
+                <view
+                  class="synth-btn synth-btn-primary"
+                  :class="getMaxSynthesizeCount(recipe) > 0 && !synthesizing ? 'btn-ready' : 'btn-locked'"
+                  @tap="onBatchSynthesize(recipe)"
+                >
+                  <text class="btn-text">{{ batchSynthesizing ? '批量中' : (getMaxSynthesizeCount(recipe) > 0 ? '一键合成' : '不足') }}</text>
+                  <view v-if="getMaxSynthesizeCount(recipe) > 0 && !batchSynthesizing" class="btn-shine"></view>
+                </view>
               </view>
             </view>
           </view>
@@ -115,10 +129,11 @@
 <script setup>
 import { ref } from 'vue'
 import { onLoad } from '@dcloudio/uni-app'
-import { getSynthesisRecipes, doSynthesis } from '../../api/synthesis.js'
+import { getSynthesisRecipes, doSynthesis, doBatchSynthesis } from '../../api/synthesis.js'
 
 const loading = ref(true)
 const synthesizing = ref(false)
+const batchSynthesizing = ref(false)
 const isRefreshing = ref(false)
 const recipes = ref([])
 
@@ -142,6 +157,21 @@ function getOverallProgress(recipe) {
   return Math.round((getReadyCount(recipe) / recipe.materials.length) * 100)
 }
 
+function getMaxSynthesizeCount(recipe) {
+  return Number(recipe?.max_synthesize_count || 0)
+}
+
+function confirmSynthesis({ title, content }) {
+  return new Promise((resolve, reject) => {
+    uni.showModal({
+      title,
+      content,
+      success: (res) => res.confirm ? resolve() : reject(new Error('cancel')),
+      fail: reject
+    })
+  })
+}
+
 async function loadRecipes() {
   loading.value = true
   const userId = uni.getStorageSync('user_id')
@@ -166,15 +196,11 @@ async function onRefresh() {
 }
 
 async function onSynthesize(recipe) {
-  if (synthesizing.value || !recipe.can_synthesize) return
+  if (synthesizing.value || batchSynthesizing.value || !recipe.can_synthesize) return
   try {
-    await new Promise((resolve, reject) => {
-      uni.showModal({
-        title: '确认合成',
-        content: `确定要合成「${recipe.target_product?.name || '目标商品'}」吗？合成后碎片将被消耗。`,
-        success: (res) => res.confirm ? resolve() : reject('cancel'),
-        fail: reject
-      })
+    await confirmSynthesis({
+      title: '确认合成',
+      content: `确定要合成「${recipe.target_product?.name || '目标商品'}」吗？合成后碎片将被消耗。`
     })
   } catch {
     return
@@ -193,6 +219,33 @@ async function onSynthesize(recipe) {
   }
 }
 
+async function onBatchSynthesize(recipe) {
+  const maxCount = getMaxSynthesizeCount(recipe)
+  if (batchSynthesizing.value || synthesizing.value || maxCount <= 0) return
+
+  try {
+    await confirmSynthesis({
+      title: '确认一键合成',
+      content: `将消耗当前全部可用碎片，预计合成 ${maxCount} 次「${recipe.target_product?.name || '目标商品'}」，是否继续？`
+    })
+  } catch {
+    return
+  }
+
+  batchSynthesizing.value = true
+  const userId = uni.getStorageSync('user_id')
+  try {
+    const res = await doBatchSynthesis(userId, recipe.id)
+    const count = Number(res?.synthesized_count || maxCount)
+    uni.showToast({ title: `一键合成成功，共合成 ${count} 次`, icon: 'none' })
+    await loadRecipes()
+  } catch (e) {
+    uni.showToast({ title: e?.message || '一键合成失败', icon: 'none' })
+  } finally {
+    batchSynthesizing.value = false
+  }
+}
+
 onLoad(() => {
   loadRecipes()
 })
@@ -535,27 +588,47 @@ defineExpose({ onShow })
 /* 底部行：进度提示 + 按钮 */
 .ticket-footer {
   display: flex;
-  align-items: center;
-  justify-content: space-between;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 14rpx;
   margin-top: 4rpx;
 }
 
+.ready-meta {
+  display: flex;
+  flex-direction: column;
+  gap: 6rpx;
+}
+
 .ready-hint {
   font-size: 20rpx;
   color: $text-tertiary;
 }
 
+.batch-hint {
+  font-size: 20rpx;
+  color: $brand-primary;
+  font-weight: 600;
+}
+
+.action-group {
+  display: flex;
+  align-items: center;
+  gap: 12rpx;
+}
+
 /* 合成按钮 - 小胶囊 */
 .synth-btn {
-  height: 56rpx;
-  padding: 0 28rpx;
-  border-radius: 28rpx;
+  flex: 1;
+  min-width: 0;
+  height: 52rpx;
+  padding: 0 16rpx;
+  border-radius: 26rpx;
   display: flex;
   align-items: center;
   justify-content: center;
   position: relative;
   overflow: hidden;
-  flex-shrink: 0;
   transition: all 0.2s cubic-bezier(0.18, 0.89, 0.32, 1.28);
 
   &.btn-ready {
@@ -563,7 +636,7 @@ defineExpose({ onShow })
     box-shadow: 0 6rpx 16rpx rgba($brand-primary, 0.3);
 
     &:active {
-      transform: scale(0.94);
+      transform: scale(0.96);
       opacity: 0.9;
     }
   }
@@ -573,15 +646,25 @@ defineExpose({ onShow })
   }
 }
 
+.synth-btn-primary {
+  min-width: 0;
+}
+
+.synth-btn-secondary {
+  &.btn-ready {
+    background: linear-gradient(135deg, rgba($brand-primary, 0.14), rgba($brand-primary, 0.08));
+    box-shadow: none;
+    border: 1.5rpx solid rgba($brand-primary, 0.25);
+  }
+}
+
 .btn-text {
-  font-size: 24rpx;
+  font-size: 22rpx;
   font-weight: 700;
-  letter-spacing: 1rpx;
+  letter-spacing: 0;
   position: relative;
   z-index: 2;
-
-  .btn-ready & { color: #fff; }
-  .btn-locked & { color: $text-tertiary; }
+  white-space: nowrap;
 }
 
 .btn-shine {
diff --git a/pages/cabinet/index.vue b/pages/cabinet/index.vue
index 0205b17..fd56b56 100755
--- a/pages/cabinet/index.vue
+++ b/pages/cabinet/index.vue
@@ -213,16 +213,30 @@
               </view>
             </view>
             <view class="ticket-footer">
-              <text class="ready-hint">
-                {{ getSynthReadyCount(recipe) }}/{{ recipe.materials?.length || 0 }} 材料就绪
-              </text>
-              <view
-                class="synth-btn"
-                :class="recipe.can_synthesize ? 'btn-ready' : 'btn-locked'"
-                @tap="onSynthesize(recipe)"
-              >
-                <text class="btn-text">{{ synthesizing ? '合成中' : (recipe.can_synthesize ? '合成' : '不足') }}</text>
-                <view v-if="recipe.can_synthesize" class="btn-shine"></view>
+              <view class="ready-meta">
+                <text class="ready-hint">
+                  {{ getSynthReadyCount(recipe) }}/{{ recipe.materials?.length || 0 }} 材料就绪
+                </text>
+                <text class="batch-hint" v-if="getSynthMaxCount(recipe) > 0">
+                  最多可合成 {{ getSynthMaxCount(recipe) }} 次
+                </text>
+              </view>
+              <view class="action-group">
+                <view
+                  class="synth-btn synth-btn-secondary"
+                  :class="recipe.can_synthesize && !batchSynthesizing ? 'btn-ready' : 'btn-locked'"
+                  @tap="onSynthesize(recipe)"
+                >
+                  <text class="btn-text">{{ synthesizing ? '合成中' : (recipe.can_synthesize ? '单次合成' : '不足') }}</text>
+                </view>
+                <view
+                  class="synth-btn synth-btn-primary"
+                  :class="getSynthMaxCount(recipe) > 0 && !synthesizing ? 'btn-ready' : 'btn-locked'"
+                  @tap="onBatchSynthesize(recipe)"
+                >
+                  <text class="btn-text">{{ batchSynthesizing ? '批量中' : (getSynthMaxCount(recipe) > 0 ? '一键合成' : '不足') }}</text>
+                  <view v-if="getSynthMaxCount(recipe) > 0 && !batchSynthesizing" class="btn-shine"></view>
+                </view>
               </view>
             </view>
           </view>
@@ -294,8 +308,8 @@
 <script setup>
 import { ref, computed } from 'vue'
 import { onShow, onReachBottom, onShareAppMessage, onPullDownRefresh } from '@dcloudio/uni-app'
-import { getInventory, getProductDetail, redeemInventory, requestShipping, cancelShipping, listAddresses, getShipments, createAddressShare, createShippingFeeOrder } from '@/api/appUser'
-import { getSynthesisRecipes, doSynthesis } from '@/api/synthesis.js'
+import { getInventory, getProductDetail, redeemInventory, requestShipping, cancelShipping, listAddresses, getShipments, createAddressShare, checkShippingFee, createShippingFeeOrder } from '@/api/appUser'
+import { getSynthesisRecipes, doSynthesis, doBatchSynthesis } from '@/api/synthesis.js'
 import { vibrateShort } from '@/utils/vibrate.js'
 import { checkPhoneBoundSync } from '@/utils/checkPhone.js'
 import { executePaymentFlow } from '@/utils/payment.js'
@@ -326,6 +340,7 @@ const pendingShipIds = ref([])
 const recipes = ref([])
 const synthLoading = ref(false)
 const synthesizing = ref(false)
+const batchSynthesizing = ref(false)
 
 const totalCount = computed(() => {
   return aggregatedList.value.reduce((sum, item) => sum + (item.count || 1), 0)
@@ -763,6 +778,21 @@ function getSynthReadyCount(recipe) {
   return recipe.materials.filter(m => m.owned_count >= m.required_count).length
 }
 
+function getSynthMaxCount(recipe) {
+  return Number(recipe?.max_synthesize_count || 0)
+}
+
+function confirmSynthesisAction({ title, content }) {
+  return new Promise((resolve, reject) => {
+    uni.showModal({
+      title,
+      content,
+      success: (res) => res.confirm ? resolve() : reject(new Error('cancel')),
+      fail: reject
+    })
+  })
+}
+
 async function loadRecipes(uid) {
   synthLoading.value = true
   const userId = uid || uni.getStorageSync('user_id')
@@ -778,23 +808,21 @@ async function loadRecipes(uid) {
 }
 
 async function onSynthesize(recipe) {
-  if (synthesizing.value || !recipe.can_synthesize) return
+  if (synthesizing.value || batchSynthesizing.value || !recipe.can_synthesize) return
   try {
-    await new Promise((resolve, reject) => {
-      uni.showModal({
-        title: '确认合成',
-        content: `确定要合成「${recipe.target_product?.name || '目标商品'}」吗？合成后碎片将被消耗。`,
-        success: (res) => res.confirm ? resolve() : reject('cancel'),
-        fail: reject
-      })
+    await confirmSynthesisAction({
+      title: '确认合成',
+      content: `确定要合成「${recipe.target_product?.name || '目标商品'}」吗？合成后碎片将被消耗。`
     })
-  } catch { return }
+  } catch {
+    return
+  }
   synthesizing.value = true
   const userId = uni.getStorageSync('user_id')
   try {
     await doSynthesis(userId, recipe.id)
     uni.showToast({ title: '合成成功！', icon: 'success' })
-    await loadRecipes(userId)
+    await Promise.all([loadRecipes(userId), loadInventory(userId)])
   } catch (e) {
     uni.showToast({ title: e?.message || '合成失败', icon: 'none' })
   } finally {
@@ -802,6 +830,32 @@ async function onSynthesize(recipe) {
   }
 }
 
+async function onBatchSynthesize(recipe) {
+  const maxCount = getSynthMaxCount(recipe)
+  if (batchSynthesizing.value || synthesizing.value || maxCount <= 0) return
+  try {
+    await confirmSynthesisAction({
+      title: '确认一键合成',
+      content: `将消耗当前全部可用碎片，预计合成 ${maxCount} 次「${recipe.target_product?.name || '目标商品'}」，是否继续？`
+    })
+  } catch {
+    return
+  }
+
+  batchSynthesizing.value = true
+  const userId = uni.getStorageSync('user_id')
+  try {
+    const res = await doBatchSynthesis(userId, recipe.id)
+    const count = Number(res?.synthesized_count || maxCount)
+    uni.showToast({ title: `一键合成成功，共合成 ${count} 次`, icon: 'none' })
+    await Promise.all([loadRecipes(userId), loadInventory(userId)])
+  } catch (e) {
+    uni.showToast({ title: e?.message || '一键合成失败', icon: 'none' })
+  } finally {
+    batchSynthesizing.value = false
+  }
+}
+
 async function onRedeem() {
   vibrateShort()
   const user_id = uni.getStorageSync('user_id')
@@ -907,13 +961,26 @@ async function confirmShipWithAddress() {
   showAddressPicker.value = false
 
   const FREIGHT_THRESHOLD = 5
-  const FREIGHT_FEE = 10
 
-  if (allIds.length < FREIGHT_THRESHOLD) {
+  let shippingCheck
+  try {
+    shippingCheck = await checkShippingFee(user_id, allIds)
+  } catch (e) {
+    uni.showToast({ title: e?.message || '运费校验失败', icon: 'none' })
+    return
+  }
+
+  if (shippingCheck?.need_fee) {
+    const fee = Number(shippingCheck?.fee_cents || 0) / 100
+    const reason = shippingCheck?.reason
+    const content = reason === 'contains_non_free_shipping_item'
+      ? `所选商品包含不包邮商品，需支付 ¥${fee.toFixed(2)} 运费，确认继续？`
+      : `共 ${allIds.length} 件商品，不满 ${FREIGHT_THRESHOLD} 件需支付 ¥${fee.toFixed(2)} 运费，确认继续？`
+
     const confirmed = await new Promise((resolve) => {
       uni.showModal({
         title: '需支付运费',
-        content: `共 ${allIds.length} 件商品，不满 ${FREIGHT_THRESHOLD} 件需支付 ¥${FREIGHT_FEE}.00 运费，确认继续？`,
+        content,
         confirmText: '去支付',
         cancelText: '取消',
         success: (res) => resolve(res.confirm)
@@ -934,25 +1001,8 @@ async function confirmShipWithAddress() {
       return
     }
     uni.hideLoading()
-
-    uni.showLoading({ title: '提交中...' })
-    try {
-      await requestShipping(user_id, allIds, addressId)
-      uni.showToast({ title: '申请成功', icon: 'success' })
-      pendingShipIds.value = []
-      aggregatedList.value = []
-      page.value = 1
-      hasMore.value = true
-      loadInventory(user_id)
-    } catch (e) {
-      uni.showToast({ title: e.message || '申请失败', icon: 'none' })
-    } finally {
-      uni.hideLoading()
-    }
-    return
   }
 
-  // 满5件包邮直接发货
   uni.showLoading({ title: '提交中...' })
   try {
     await requestShipping(user_id, allIds, addressId)
@@ -1977,33 +2027,54 @@ function onCopyShareLink() {
 
 .ticket-footer {
   display: flex;
-  align-items: center;
-  justify-content: space-between;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 14rpx;
   margin-top: 4rpx;
 }
 
+.ready-meta {
+  display: flex;
+  flex-direction: column;
+  gap: 6rpx;
+}
+
 .ready-hint {
   font-size: 20rpx;
   color: $text-tertiary;
 }
 
+.batch-hint {
+  font-size: 20rpx;
+  color: $brand-primary;
+  font-weight: 600;
+}
+
+.action-group {
+  display: flex;
+  align-items: center;
+  gap: 12rpx;
+}
+
 .synth-btn {
-  height: 56rpx;
-  padding: 0 28rpx;
-  border-radius: 28rpx;
+  flex: 1;
+  min-width: 0;
+  height: 52rpx;
+  padding: 0 16rpx;
+  border-radius: 26rpx;
   display: flex;
   align-items: center;
   justify-content: center;
   position: relative;
   overflow: hidden;
-  flex-shrink: 0;
+  transition: all 0.2s cubic-bezier(0.18, 0.89, 0.32, 1.28);
 
   &.btn-ready {
     background: $gradient-brand;
     box-shadow: 0 6rpx 16rpx rgba($brand-primary, 0.3);
 
     &:active {
-      transform: scale(0.94);
+      transform: scale(0.96);
       opacity: 0.9;
     }
   }
@@ -2013,12 +2084,25 @@ function onCopyShareLink() {
   }
 }
 
+.synth-btn-primary {
+  min-width: 0;
+}
+
+.synth-btn-secondary {
+  &.btn-ready {
+    background: linear-gradient(135deg, rgba($brand-primary, 0.14), rgba($brand-primary, 0.08));
+    box-shadow: none;
+    border: 1.5rpx solid rgba($brand-primary, 0.25);
+  }
+}
+
 .btn-text {
-  font-size: 24rpx;
+  font-size: 22rpx;
   font-weight: 700;
-  letter-spacing: 1rpx;
+  letter-spacing: 0;
   position: relative;
   z-index: 2;
+  white-space: nowrap;
 
   .btn-ready & { color: #fff; }
   .btn-locked & { color: $text-tertiary; }