diff --git a/frontend/src/views/user/Cart.vue b/frontend/src/views/user/Cart.vue
index 66ecd93..31c8744 100644
--- a/frontend/src/views/user/Cart.vue
+++ b/frontend/src/views/user/Cart.vue
@@ -22,17 +22,17 @@
           </div>
           
           <div class="cart-list">
-            <div 
-              v-for="item in items" 
-              :key="item.id" 
+            <div
+              v-for="item in items"
+              :key="item.id"
               class="cart-item"
               :class="{ 'item-disabled': !item.product?.is_active }"
             >
-              <el-checkbox v-model="selectedIds" :value="item.id" />
-              
+              <el-checkbox v-model="selectedIds" :value="item.id" class="item-check" />
+
               <div class="item-product" @click="$router.push(`/products/${item.product?.id}`)">
-                <el-image 
-                  :src="getFirstImage(item.product?.images)" 
+                <el-image
+                  :src="getFirstImage(item.product?.images)"
                   fit="cover"
                   class="item-image"
                 >
@@ -55,11 +55,11 @@
                   <p v-if="!item.product?.is_active" class="item-off">已下架</p>
                 </div>
               </div>
-              
+
               <div class="item-price">
                 <span class="price-current">¥{{ item.product?.price }}</span>
               </div>
-              
+
               <div class="item-quantity">
                 <el-input-number
                   v-model="item.quantity"
@@ -72,14 +72,27 @@
                   仅剩 {{ item.product?.stock }} 件
                 </span>
               </div>
-              
+
               <div class="item-subtotal">
                 <span class="subtotal-price">¥{{ ((item.product?.price || 0) * item.quantity).toFixed(2) }}</span>
               </div>
-              
+
               <div class="item-action">
                 <el-button link type="danger" size="small" @click="removeItem(item.id)">删除</el-button>
               </div>
+
+              <!-- 移动端底部行：单价+数量+小计 -->
+              <div class="item-mobile-bottom">
+                <span class="mobile-price">¥{{ item.product?.price }}</span>
+                <el-input-number
+                  v-model="item.quantity"
+                  :min="1"
+                  :max="getMaxQuantity(item.product)"
+                  size="small"
+                  @change="(val: number) => updateQuantity(item, val)"
+                />
+                <span class="mobile-subtotal">¥{{ ((item.product?.price || 0) * item.quantity).toFixed(2) }}</span>
+              </div>
             </div>
           </div>
         </div>
@@ -523,6 +536,7 @@ onMounted(() => {
   padding: 16px 20px;
   border-bottom: 1px solid rgba(255, 255, 255, 0.04);
   transition: background 0.2s;
+  position: relative;
 
   &:hover {
     background: rgba(255, 255, 255, 0.02);
@@ -639,6 +653,11 @@ onMounted(() => {
   flex-shrink: 0;
 }
 
+/* 移动端底部行 - 桌面端隐藏 */
+.item-mobile-bottom {
+  display: none;
+}
+
 .checkout-section {
   background: #2d2d44;
   border: 1px solid rgba(255, 255, 255, 0.06);
@@ -966,63 +985,84 @@ onMounted(() => {
     display: flex !important;
     flex-wrap: wrap !important;
     padding: 12px !important;
-    gap: 10px !important;
+    gap: 8px !important;
     align-items: flex-start !important;
   }
 
-  /* 第一行：复选框 + 商品信息 + 删除 */
-  .cart-item > .el-checkbox {
-    order: 1 !important;
-    flex: 0 0 auto !important;
-    width: auto !important;
+  /* 隐藏桌面端元素 */
+  .cart-item > .item-price,
+  .cart-item > .item-quantity,
+  .cart-item > .item-subtotal {
+    display: none !important;
+  }
+
+  /* 复选框 */
+  .cart-item > .item-check {
+    flex: 0 0 20px !important;
+    width: 20px !important;
     margin-right: 0 !important;
   }
 
+  /* 商品信息 */
   .cart-item > .item-product {
-    order: 2 !important;
-    flex: 1 1 auto !important;
+    flex: 1 1 calc(100% - 80px) !important;
     min-width: 0 !important;
     display: flex !important;
     gap: 10px !important;
+    align-items: flex-start !important;
+    padding-right: 40px !important;
   }
 
+  /* 删除按钮 */
   .cart-item > .item-action {
-    order: 3 !important;
+    position: absolute !important;
+    right: 12px !important;
+    top: 12px !important;
     flex: 0 0 auto !important;
     width: auto !important;
   }
 
-  /* 第二行：单价 + 数量 + 小计 */
-  .cart-item > .item-price {
-    order: 4 !important;
-    flex: 0 0 auto !important;
+  /* 移动端底部行 - 显示 */
+  .item-mobile-bottom {
     display: flex !important;
+    flex: 0 0 100% !important;
+    width: 100% !important;
     align-items: center !important;
-    margin-left: 32px !important;
-    width: auto !important;
+    justify-content: space-between !important;
+    padding-left: 28px !important;
+    gap: 8px !important;
+    margin-top: 4px !important;
   }
 
-  .cart-item > .item-quantity {
-    order: 5 !important;
-    flex: 1 1 auto !important;
-    display: flex !important;
-    align-items: center !important;
-    justify-content: center !important;
-    width: auto !important;
-    min-width: 100px !important;
+  .item-mobile-bottom .mobile-price {
+    font-size: 13px !important;
+    color: rgba(255, 255, 255, 0.8) !important;
+    white-space: nowrap !important;
   }
 
-  .cart-item > .item-subtotal {
-    order: 6 !important;
-    flex: 0 0 auto !important;
-    width: auto !important;
-    text-align: right !important;
+  .item-mobile-bottom :deep(.el-input-number) {
+    width: 90px !important;
+  }
+
+  .item-mobile-bottom :deep(.el-input-number .el-input__wrapper) {
+    padding: 0 2px !important;
+  }
+
+  .item-mobile-bottom :deep(.el-input-number .el-input__inner) {
+    font-size: 13px !important;
+  }
+
+  .item-mobile-bottom .mobile-subtotal {
+    font-size: 15px !important;
+    font-weight: 600 !important;
+    color: #f56c6c !important;
+    white-space: nowrap !important;
   }
 
   /* 商品图片 */
   .item-product .item-image {
-    width: 60px !important;
-    height: 60px !important;
+    width: 55px !important;
+    height: 55px !important;
     flex-shrink: 0 !important;
     border-radius: 6px !important;
   }
@@ -1034,9 +1074,9 @@ onMounted(() => {
   }
 
   .item-name {
-    font-size: 14px !important;
-    line-height: 1.4 !important;
-    margin-bottom: 4px !important;
+    font-size: 13px !important;
+    line-height: 1.35 !important;
+    margin-bottom: 2px !important;
     word-break: break-all !important;
     display: -webkit-box !important;
     -webkit-line-clamp: 2 !important;
@@ -1045,44 +1085,9 @@ onMounted(() => {
   }
 
   .item-tags {
-    flex-wrap: wrap !important;
-    gap: 4px !important;
-
-    .el-tag {
-      font-size: 10px !important;
-      padding: 0 4px !important;
-      height: 18px !important;
-      line-height: 16px !important;
-    }
-  }
-
-  /* 单价 */
-  .item-price .price-current {
-    font-size: 14px !important;
-  }
-
-  /* 数量选择器 */
-  .item-quantity :deep(.el-input-number) {
-    width: 90px !important;
-  }
-
-  .item-quantity :deep(.el-input-number .el-input__wrapper) {
-    padding: 0 2px !important;
-  }
-
-  .item-quantity :deep(.el-input-number .el-input__inner) {
-    font-size: 13px !important;
-  }
-
-  .item-quantity .stock-tip {
     display: none !important;
   }
 
-  /* 小计 */
-  .item-subtotal .subtotal-price {
-    font-size: 15px !important;
-  }
-
   /* 地址 */
   .checkout-section {
     padding: 12px !important;