diff --git a/admin/src/views/Config.vue b/admin/src/views/Config.vue
index 378ca29..245fd59 100644
--- a/admin/src/views/Config.vue
+++ b/admin/src/views/Config.vue
@@ -124,6 +124,22 @@
         </el-form>
       </el-tab-pane>
 
+      <!-- 最低佣金 -->
+      <el-tab-pane label="最低佣金" name="min_commission">
+        <el-form label-width="120px" style="max-width: 500px;">
+          <el-form-item label="最低佣金">
+            <el-input-number v-model="minCommission" :min="0.01" :max="100" :step="0.1" :precision="2" />
+            <span style="margin-left: 8px; color: #909399;">元</span>
+          </el-form-item>
+          <el-form-item>
+            <span style="color: #909399; font-size: 13px;">小程序下单页的跑腿佣金最低金额，修改后提示文字自动更新</span>
+          </el-form-item>
+          <el-form-item>
+            <el-button type="primary" :loading="saving" @click="saveMinCommission">保存</el-button>
+          </el-form-item>
+        </el-form>
+      </el-tab-pane>
+
       <!-- 冻结时间 -->
       <el-tab-pane label="冻结时间" name="freeze_days">
         <el-form label-width="120px" style="max-width: 500px;">
@@ -184,6 +200,7 @@ const commissionRules = ref([])
 // 系统配置
 const configs = reactive({ qrcode: '', agreement: '', privacy: '', runner_agreement: '', withdrawal_guide: '' })
 const freezeDays = ref(1)
+const minCommission = ref(1.0)
 
 // 页面顶图配置
 const pageBannerList = [
@@ -257,6 +274,23 @@ async function saveFreezeDays() {
   }
 }
 
+async function fetchMinCommission() {
+  try {
+    const res = await request.get('/admin/config/min_commission')
+    if (res?.value) minCommission.value = parseFloat(res.value) || 1.0
+  } catch (e) {}
+}
+
+async function saveMinCommission() {
+  saving.value = true
+  try {
+    await request.put('/admin/config/min_commission', { value: String(minCommission.value) })
+    ElMessage.success('最低佣金保存成功')
+  } finally {
+    saving.value = false
+  }
+}
+
 async function fetchPageBanners() {
   for (const item of pageBannerList) {
     try {
@@ -287,6 +321,7 @@ onMounted(async () => {
     fetchConfig('runner_agreement'),
     fetchConfig('withdrawal_guide'),
     fetchFreezeDays(),
+    fetchMinCommission(),
     fetchPageBanners()
   ])
 })
diff --git a/miniapp/manifest.json b/miniapp/manifest.json
index 95cae1d..9a7f355 100644
--- a/miniapp/manifest.json
+++ b/miniapp/manifest.json
@@ -1,5 +1,5 @@
 {
-    "name" : "miniapp",
+    "name" : "校园跑腿侠",
     "appid" : "__UNI__F1854F8",
     "description" : "",
     "versionName" : "1.0.0",
diff --git a/miniapp/pages/delivery/delivery.vue b/miniapp/pages/delivery/delivery.vue
index bce0a22..366e767 100644
--- a/miniapp/pages/delivery/delivery.vue
+++ b/miniapp/pages/delivery/delivery.vue
@@ -63,7 +63,7 @@
 			<view class="form-group">
 				<text class="form-label">6.跑腿佣金</text>
 				<view class="input-box">
-					<input v-model="form.commission" type="digit" placeholder="请输入跑腿佣金，最低1.0元" placeholder-class="placeholder" />
+					<input v-model="form.commission" type="digit" :placeholder="`请输入跑腿佣金，最低${minCommission}元`" placeholder-class="placeholder" />
 				</view>
 				<text class="form-tip">佣金先由平台保管，接单方完成订单后才会收到佣金</text>
 			</view>
@@ -79,7 +79,7 @@
 </template>
 
 <script>
-import { createOrder, getPageBanner } from '../../utils/api'
+import { createOrder, getPageBanner, getMinCommission } from '../../utils/api'
 
 export default {
 	data() {
@@ -94,13 +94,15 @@ export default {
 				phone: '',
 				commission: ''
 			},
-			submitting: false
+			submitting: false,
+			minCommission: 1.0
 		}
 	},
 	onLoad() {
 		const sysInfo = uni.getSystemInfoSync()
 		this.statusBarHeight = sysInfo.statusBarHeight || 0
 		this.loadBanner()
+		this.loadMinCommission()
 		this.restoreFormData()
 	},
 	methods: {
@@ -122,14 +124,20 @@ export default {
 				if (res?.value) this.bannerUrl = res.value
 			} catch (e) {}
 		},
+		async loadMinCommission() {
+			try {
+				const res = await getMinCommission()
+				if (res?.value) this.minCommission = parseFloat(res.value) || 1.0
+			} catch (e) {}
+		},
 		validateCommission() {
 			const val = this.form.commission
 			if (!val) {
 				uni.showToast({ title: '请输入跑腿佣金', icon: 'none' }); return false
 			}
 			const num = parseFloat(val)
-			if (isNaN(num) || num < 1.0) {
-				uni.showToast({ title: '跑腿佣金不可低于1.0元', icon: 'none' }); return false
+			if (isNaN(num) || num < this.minCommission) {
+				uni.showToast({ title: `跑腿佣金不可低于${this.minCommission}元`, icon: 'none' }); return false
 			}
 			if (val.includes('.') && val.split('.')[1].length > 1) {
 				uni.showToast({ title: '佣金最多支持小数点后1位', icon: 'none' }); return false
diff --git a/miniapp/pages/food/food-order.vue b/miniapp/pages/food/food-order.vue
index 0e595f6..6216af7 100644
--- a/miniapp/pages/food/food-order.vue
+++ b/miniapp/pages/food/food-order.vue
@@ -54,7 +54,7 @@
 				<text class="form-label">跑腿佣金</text>
 				<view class="commission-input">
 					<text class="commission-unit">¥</text>
-					<input class="form-input commission-field" v-model="form.commission" type="digit" placeholder="最低1.0元" />
+					<input class="form-input commission-field" v-model="form.commission" type="digit" :placeholder="`最低${minCommission}元`" />
 				</view>
 			</view>
 		</view>
@@ -68,7 +68,7 @@
 </template>
 
 <script>
-import { createOrder } from '../../utils/api'
+import { createOrder, getMinCommission } from '../../utils/api'
 import { useCartStore } from '../../stores/cart'
 
 export default {
@@ -81,7 +81,8 @@ export default {
 				commission: ''
 			},
 			submitting: false,
-			statusBarHeight: 0
+			statusBarHeight: 0,
+			minCommission: 1.0
 		}
 	},
 	computed: {
@@ -105,6 +106,7 @@ export default {
 	onLoad() {
 		const sysInfo = uni.getSystemInfoSync()
 		this.statusBarHeight = sysInfo.statusBarHeight || 0
+		this.loadMinCommission()
 		// 如果购物车为空，返回上一页
 		if (this.cartStore.totalCount === 0) {
 			uni.showToast({ title: '购物车为空', icon: 'none' })
@@ -113,6 +115,12 @@ export default {
 	},
 	methods: {
 		goBack() { uni.navigateBack() },
+		async loadMinCommission() {
+			try {
+				const res = await getMinCommission()
+				if (res?.value) this.minCommission = parseFloat(res.value) || 1.0
+			} catch (e) {}
+		},
 		/** 校验佣金 */
 		validateCommission() {
 			const val = this.form.commission
@@ -121,8 +129,8 @@ export default {
 				return false
 			}
 			const num = parseFloat(val)
-			if (isNaN(num) || num < 1.0) {
-				uni.showToast({ title: '跑腿佣金不可低于1.0元', icon: 'none' })
+			if (isNaN(num) || num < this.minCommission) {
+				uni.showToast({ title: `跑腿佣金不可低于${this.minCommission}元`, icon: 'none' })
 				return false
 			}
 			if (val.includes('.') && val.split('.')[1].length > 1) {
diff --git a/miniapp/pages/help/help.vue b/miniapp/pages/help/help.vue
index 8544193..77575a7 100644
--- a/miniapp/pages/help/help.vue
+++ b/miniapp/pages/help/help.vue
@@ -1,4 +1,4 @@
-<template>
+<template>
 	<view class="order-page">
 		<!-- 自定义导航栏 -->
 		<view class="custom-navbar" :style="{ paddingTop: statusBarHeight + 'px' }">
@@ -50,7 +50,7 @@
 			<view class="form-group">
 				<text class="form-label">4.跑腿佣金</text>
 				<view class="input-box">
-					<input v-model="form.commission" type="digit" placeholder="请输入跑腿佣金"
+					<input v-model="form.commission" type="digit" :placeholder="`请输入跑腿佣金，最低${minCommission}元`"
 						placeholder-class="placeholder" />
 				</view>
 				<text class="form-tip">佣金先由平台保管，接单方完成订单后才会收到佣金</text>
@@ -70,7 +70,8 @@
 <script>
 	import {
 		createOrder,
-		getPageBanner
+		getPageBanner,
+		getMinCommission
 	} from '../../utils/api'
 
 	export default {
@@ -84,7 +85,8 @@
 				},
 				submitting: false,
 				statusBarHeight: 0,
-				bannerUrl: ''
+				bannerUrl: '',
+				minCommission: 1.0
 			}
 		},
 		computed: {
@@ -99,6 +101,7 @@
 			const sysInfo = uni.getSystemInfoSync()
 			this.statusBarHeight = sysInfo.statusBarHeight || 0
 			this.loadBanner()
+			this.loadMinCommission()
 			this.restoreFormData()
 		},
 		methods: {
@@ -122,6 +125,12 @@
 					if (res?.value) this.bannerUrl = res.value
 				} catch (e) {}
 			},
+			async loadMinCommission() {
+				try {
+					const res = await getMinCommission()
+					if (res?.value) this.minCommission = parseFloat(res.value) || 1.0
+				} catch (e) {}
+			},
 			/** 校验佣金 */
 			validateCommission() {
 				const val = this.form.commission
@@ -133,9 +142,9 @@
 					return false
 				}
 				const num = parseFloat(val)
-				if (isNaN(num) || num < 1.0) {
+				if (isNaN(num) || num < this.minCommission) {
 					uni.showToast({
-						title: '跑腿佣金不可低于1.0元',
+						title: `跑腿佣金不可低于${this.minCommission}元`,
 						icon: 'none'
 					})
 					return false
diff --git a/miniapp/pages/pickup/pickup.vue b/miniapp/pages/pickup/pickup.vue
index 4f84f37..8630278 100644
--- a/miniapp/pages/pickup/pickup.vue
+++ b/miniapp/pages/pickup/pickup.vue
@@ -63,7 +63,7 @@
 			<view class="form-group">
 				<text class="form-label">6.跑腿佣金</text>
 				<view class="input-box">
-					<input v-model="form.commission" type="digit" placeholder="请输入跑腿佣金，最低1.0元" placeholder-class="placeholder" />
+					<input v-model="form.commission" type="digit" :placeholder="`请输入跑腿佣金，最低${minCommission}元`" placeholder-class="placeholder" />
 				</view>
 				<text class="form-tip">佣金先由平台保管，接单方完成订单后才会收到佣金</text>
 			</view>
@@ -79,7 +79,7 @@
 </template>
 
 <script>
-import { createOrder, getPageBanner } from '../../utils/api'
+import { createOrder, getPageBanner, getMinCommission } from '../../utils/api'
 
 export default {
 	data() {
@@ -94,13 +94,15 @@ export default {
 				phone: '',
 				commission: ''
 			},
-			submitting: false
+			submitting: false,
+			minCommission: 1.0
 		}
 	},
 	onLoad() {
 		const sysInfo = uni.getSystemInfoSync()
 		this.statusBarHeight = sysInfo.statusBarHeight || 0
 		this.loadBanner()
+		this.loadMinCommission()
 		this.restoreFormData()
 	},
 	methods: {
@@ -122,6 +124,12 @@ export default {
 				if (res?.value) this.bannerUrl = res.value
 			} catch (e) {}
 		},
+		async loadMinCommission() {
+			try {
+				const res = await getMinCommission()
+				if (res?.value) this.minCommission = parseFloat(res.value) || 1.0
+			} catch (e) {}
+		},
 		validateCommission() {
 			const val = this.form.commission
 			if (!val) {
@@ -129,8 +137,8 @@ export default {
 				return false
 			}
 			const num = parseFloat(val)
-			if (isNaN(num) || num < 1.0) {
-				uni.showToast({ title: '跑腿佣金不可低于1.0元', icon: 'none' })
+			if (isNaN(num) || num < this.minCommission) {
+				uni.showToast({ title: `跑腿佣金不可低于${this.minCommission}元`, icon: 'none' })
 				return false
 			}
 			if (val.includes('.') && val.split('.')[1].length > 1) {
diff --git a/miniapp/pages/purchase/purchase.vue b/miniapp/pages/purchase/purchase.vue
index 8a2ee70..fcb7f70 100644
--- a/miniapp/pages/purchase/purchase.vue
+++ b/miniapp/pages/purchase/purchase.vue
@@ -62,7 +62,7 @@
 			<view class="form-group">
 				<text class="form-label">7.跑腿佣金</text>
 				<view class="input-box">
-					<input v-model="form.commission" type="digit" placeholder="请输入跑腿佣金，最低1.0元"
+					<input v-model="form.commission" type="digit" :placeholder="`请输入跑腿佣金，最低${minCommission}元`"
 						placeholder-class="placeholder" />
 				</view>
 				<text class="form-tip">佣金先由平台保管，接单方完成订单后才会收到佣金</text>
@@ -82,7 +82,8 @@
 <script>
 	import {
 		createOrder,
-		getPageBanner
+		getPageBanner,
+		getMinCommission
 	} from '../../utils/api'
 
 	export default {
@@ -99,7 +100,8 @@
 				},
 				submitting: false,
 				statusBarHeight: 0,
-				bannerUrl: ''
+				bannerUrl: '',
+				minCommission: 1.0
 			}
 		},
 		computed: {
@@ -114,6 +116,7 @@
 			const sysInfo = uni.getSystemInfoSync()
 			this.statusBarHeight = sysInfo.statusBarHeight || 0
 			this.loadBanner()
+			this.loadMinCommission()
 			this.restoreFormData()
 		},
 		methods: {
@@ -137,6 +140,12 @@
 					if (res?.value) this.bannerUrl = res.value
 				} catch (e) {}
 			},
+			async loadMinCommission() {
+				try {
+					const res = await getMinCommission()
+					if (res?.value) this.minCommission = parseFloat(res.value) || 1.0
+				} catch (e) {}
+			},
 			validateCommission() {
 				const val = this.form.commission
 				if (!val) {
@@ -147,9 +156,9 @@
 					return false
 				}
 				const num = parseFloat(val)
-				if (isNaN(num) || num < 1.0) {
+				if (isNaN(num) || num < this.minCommission) {
 					uni.showToast({
-						title: '跑腿佣金不可低于1.0元',
+						title: `跑腿佣金不可低于${this.minCommission}元`,
 						icon: 'none'
 					});
 					return false
diff --git a/miniapp/utils/api.js b/miniapp/utils/api.js
index ce0794a..75c3115 100644
--- a/miniapp/utils/api.js
+++ b/miniapp/utils/api.js
@@ -217,6 +217,11 @@ export function getPageBanner(page) {
 	return request({ url: `/api/config/page-banner/${page}` })
 }
 
+/** 获取最低佣金配置 */
+export function getMinCommission() {
+	return request({ url: '/api/config/min-commission' })
+}
+
 // ==================== 腾讯 IM ====================
 
 /** 获取 IM UserSig */
diff --git a/miniapp/utils/request.js b/miniapp/utils/request.js
index aa75b5d..19c6591 100644
--- a/miniapp/utils/request.js
+++ b/miniapp/utils/request.js
@@ -6,8 +6,8 @@
  */
 
 // API 基础地址，按环境切换
-// const BASE_URL = 'http://localhost:5099'
-const BASE_URL = 'http://api.zwz.shhmkjgs.cn'
+const BASE_URL = 'http://localhost:5099'
+// const BASE_URL = 'http://api.zwz.shhmkjgs.cn'
 
 /**
  * 获取本地存储的 token
diff --git a/server/Endpoints/ConfigEndpoints.cs b/server/Endpoints/ConfigEndpoints.cs
index 15f49d6..b2534b0 100644
--- a/server/Endpoints/ConfigEndpoints.cs
+++ b/server/Endpoints/ConfigEndpoints.cs
@@ -82,6 +82,18 @@ public static class ConfigEndpoints
             });
         });
 
+        // 获取最低佣金配置
+        app.MapGet("/api/config/min-commission", async (AppDbContext db) =>
+        {
+            var config = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "min_commission");
+            return Results.Ok(new ConfigResponse
+            {
+                Key = "min_commission",
+                Value = config?.Value ?? "1.0",
+                UpdatedAt = config?.UpdatedAt ?? DateTime.MinValue
+            });
+        });
+
         // 管理端获取指定配置
         app.MapGet("/api/admin/config/{key}", async (string key, AppDbContext db) =>
         {
@@ -101,6 +113,7 @@ public static class ConfigEndpoints
             var allowedKeys = new HashSet<string>
             {
                 "qrcode", "agreement", "privacy", "runner_agreement", "withdrawal_guide", "freeze_days",
+                "min_commission",
                 "page_banner_pickup", "page_banner_delivery", "page_banner_help", "page_banner_purchase", "page_banner_food",
                 "page_banner_order-hall"
             };
diff --git a/server/Endpoints/OrderEndpoints.cs b/server/Endpoints/OrderEndpoints.cs
index fe93395..b1d0080 100644
--- a/server/Endpoints/OrderEndpoints.cs
+++ b/server/Endpoints/OrderEndpoints.cs
@@ -25,10 +25,15 @@ public static class OrderEndpoints
                 return Results.BadRequest(new { code = 400, message = "订单类型不合法" });
             }
 
-            // 佣金校验：最低 1.0 元
-            if (request.Commission < 1.0m)
+            // 佣金校验：读取最低佣金配置
+            var minCommissionConfig = await db.SystemConfigs.FirstOrDefaultAsync(c => c.Key == "min_commission");
+            var minCommission = 1.0m;
+            if (minCommissionConfig != null && decimal.TryParse(minCommissionConfig.Value, out var configMin))
+                minCommission = configMin;
+
+            if (request.Commission < minCommission)
             {
-                return Results.BadRequest(new { code = 400, message = "跑腿佣金不可低于1.0元" });
+                return Results.BadRequest(new { code = 400, message = $"跑腿佣金不可低于{minCommission}元" });
             }
 
             // 佣金校验：小数点后最多 1 位
diff --git a/server/Services/WxPayService.cs b/server/Services/WxPayService.cs
index 0645339..e23bb4e 100644
--- a/server/Services/WxPayService.cs
+++ b/server/Services/WxPayService.cs
@@ -12,7 +12,7 @@ public class WxPayService
     private readonly string _appId;
     private readonly string _mchId;
     private readonly string _apiV3Key;
-    private readonly string _publicKeyId;
+    private readonly string _serialNo;
     private readonly RSA _privateKey;
     private readonly HttpClient _httpClient;
 
@@ -21,7 +21,7 @@ public class WxPayService
         _appId = config["WeChat:AppId"]!;
         _mchId = config["WeChat:MchId"]!;
         _apiV3Key = config["WeChat:MchApiV3Key"]!;
-        _publicKeyId = config["WeChat:MchPublicKeyId"]!;
+        _serialNo = config["WeChat:MchSerialNo"]!;
         _httpClient = httpClient;
 
         // 加载商户私钥
@@ -61,8 +61,9 @@ public class WxPayService
         var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString();
         var nonce = Guid.NewGuid().ToString("N");
         var signature = Sign("POST", url, timestamp, nonce, json);
-        request.Headers.Add("Authorization", $"WECHATPAY2-SHA256-RSA2048 mchid=\"{_mchId}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{_publicKeyId}\",signature=\"{signature}\"");
+        request.Headers.Add("Authorization", $"WECHATPAY2-SHA256-RSA2048 mchid=\"{_mchId}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{_serialNo}\",signature=\"{signature}\"");
         request.Headers.Add("Accept", "application/json");
+        request.Headers.Add("User-Agent", "CampusErrand/1.0");
 
         var response = await _httpClient.SendAsync(request);
         var responseBody = await response.Content.ReadAsStringAsync();
@@ -157,8 +158,9 @@ public class WxPayService
         var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString();
         var nonce = Guid.NewGuid().ToString("N");
         var signature = Sign("POST", url, timestamp, nonce, json);
-        request.Headers.Add("Authorization", $"WECHATPAY2-SHA256-RSA2048 mchid=\"{_mchId}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{_publicKeyId}\",signature=\"{signature}\"");
+        request.Headers.Add("Authorization", $"WECHATPAY2-SHA256-RSA2048 mchid=\"{_mchId}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{_serialNo}\",signature=\"{signature}\"");
         request.Headers.Add("Accept", "application/json");
+        request.Headers.Add("User-Agent", "CampusErrand/1.0");
 
         var response = await _httpClient.SendAsync(request);
         var responseBody = await response.Content.ReadAsStringAsync();
diff --git a/server/appsettings.json b/server/appsettings.json
index 29d68cf..c186f79 100644
--- a/server/appsettings.json
+++ b/server/appsettings.json
@@ -23,9 +23,8 @@
     "AppSecret": "2b3b9d15fee1ed3e6204d67c86facfaf",
     "MchId": "1742482400",
     "MchApiV3Key": "1djcnfLHDJi3944HDLJK3015698fD1Oy",
-    "MchPublicKeyId": "PUB_KEY_ID_0117424824002026032900211571000202",
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