diff --git a/.workbuddy/memory/2026-08-31.md b/.workbuddy/memory/2026-08-31.md
new file mode 100644
index 0000000..a3896a4
--- /dev/null
+++ b/.workbuddy/memory/2026-08-31.md
@@ -0,0 +1,12 @@
+# 2026-08-31
+
+## 客商档案「所属组织」改为单选级联（customer-archive.vue）
+- 表单区 `el-tree-select`（多选勾选树）→ `el-cascader` 单选级联；`deptCascaderProps` 开 `checkStrictly: true`，可任意层级选中（不必选到叶子）。
+- 引入 computed `deptCascaderValue`（get/set）做「部门 ID ↔ 根到节点路径」双向转换：
+  - `archiveForm.deptId` 仍为选中部门 ID 数组（单选只一个），后端字段 `deptIds` 逗号串 / `deptName` 不变，保存逻辑 `normalizeArchive` 无需改。
+  - getter 依赖 `deptTree`，部门树异步加载完成后详情回显自动刷新（解决 created 里 initDeptTree 与 openArchive 并发的时序问题）。
+- `onDeptChange(path)` 改为取路径末级 → 写 `deptId / deptIds / deptName`；新增 `findDeptPath(id)`、`findDeptLabel(id)` 递归查找。
+- `normalizeDeptIds(detail)` 单选只取第一个 ID（历史多选数据自动收敛）。
+- 列表搜索区 `renderDeptSearch` 同步改为 `h(ElCascader, ...)`（import 从 ElTreeSelect 换 ElCascader），`searchChange` 取路径末级 ID 转部门名称。
+</content>
+</invoke>
diff --git a/src/mixins/organization-search.js b/src/mixins/organization-search.js
index 10f3061..5842986 100644
--- a/src/mixins/organization-search.js
+++ b/src/mixins/organization-search.js
@@ -1,11 +1,11 @@
 import { getDeptTree } from '@/api/system/dept';
-import { ElTreeSelect } from 'element-plus';
+import { ElCascader } from 'element-plus';
 import { h } from 'vue';
 
 /**
  * 所属组织 统一搜索 mixin
  * ------------------------------------------------------------------
- * 全站「所属组织」搜索栏统一为树形下拉（el-tree-select），风格与客户档案
+ * 全站「所属组织」搜索栏统一为级联选择器（el-cascader，单选），风格与客商档案
  * （vehicle/customer-archive.vue）保持一致。
  *
  * 接入步骤（在使用了 avue-crud 的页面中）：
@@ -15,24 +15,40 @@ import { h } from 'vue';
  *
  * 说明：
  *   - 自动识别 organizationName / deptName 两种 prop，并挂载 column.renderSearch
- *   - 树节点标识统一用 id（node-key='id'），返回值为部门 id
+ *   - 树节点标识统一用 id，级联值为「根 → 选中节点」的 id 路径数组
+ *   - checkStrictly 打开，任意层级（含非末级）都可直接选中
  *   - 页面若已有 excludeExternalOrganization / normalizeOrgTree 等方法，
  *     组件自身方法优先级更高，会覆盖本 mixin 的默认实现
- *   - 搜索值（id）需在各自的 searchChange / normalizeSearch 中按后端要求
- *     转换为部门名称（参考 contract-manage 的 normalizeSearch）
+ *   - 搜索值需在各自的 searchChange / normalizeSearch 中按后端要求转换为部门名称：
+ *     级联值是路径数组，统一用 findOrgById(路径)?.rawLabel 取末级名称
+ *   - 表单区（新增/编辑）需要回显时，可用 findOrgPath(deptId) 把 id 转成路径，
+ *     参考 customer-archive 的 deptCascaderValue 计算属性
  */
 const ORG_PROPS = ['organizationName', 'deptName'];
 
 export default {
   data() {
     return {
-      // 树形组织数据，仅供搜索栏 el-tree-select 使用；
+      // 树形组织数据，仅供搜索栏 el-cascader 使用；
       // 与页面自身 organizationOptions（多为表单扁平列表）隔离，避免相互覆盖
       organizationTreeOptions: [],
       organizationTreeFlatOptions: [],
       organizationLoading: false,
     };
   },
+  computed: {
+    // 所属组织级联配置：checkStrictly 允许选中任意层级，不必选到末级
+    organizationCascaderProps() {
+      return {
+        value: 'id',
+        label: 'label',
+        children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
+      };
+    },
+  },
   methods: {
     loadOrganizationOptions() {
       if (this.organizationLoading) return;
@@ -90,25 +106,67 @@ export default {
         ...this.flattenOrgTree(item.children || []),
       ]);
     },
+    // 兼容两种入参：级联路径数组（取末级）或单个部门 id
     findOrgById(id) {
       const value = Array.isArray(id) ? id.at(-1) : id;
       return this.organizationTreeFlatOptions.find(item => String(item.id) === String(value));
     },
+    // 由部门 id 反查「根 → 该节点」的 id 路径，供级联回显（找不到返回 null）
+    findOrgPath(id, tree = this.organizationTreeOptions, parents = []) {
+      const target = Array.isArray(id) ? id.at(-1) : id;
+      if (target === undefined || target === null || target === '') return null;
+      for (const node of tree || []) {
+        const path = [...parents, String(node.id)];
+        if (String(node.id) === String(target)) return path;
+        const matched = this.findOrgPath(target, node.children, path);
+        if (matched) return matched;
+      }
+      return null;
+    },
+    // 由部门 id 取组织名称（末级），供表单提交
+    findOrgName(id) {
+      return this.findOrgById(id)?.rawLabel || '';
+    },
+    // 组织名称 → 级联路径（表单回显用；部门树异步加载完成后会自动重算）
+    resolveOrgPath(name) {
+      const value = String(name ?? '').trim();
+      if (!value) return [];
+      const node = this.organizationTreeFlatOptions.find(item => item.rawLabel === value);
+      return node ? this.findOrgPath(node.id) || [] : [];
+    },
+    // 级联路径 → 组织名称（表单/搜索提交用，取末级节点名称）
+    resolveOrgName(path) {
+      const value = Array.isArray(path)
+        ? path.filter(item => item !== undefined && item !== null && item !== '')
+        : [];
+      return value.length ? this.findOrgById(value)?.rawLabel || '' : '';
+    },
+    // 搜索提交前把级联路径数组就地转成组织名称（后端按名称过滤）
+    normalizeOrganizationSearch(params, prop = 'organizationName') {
+      if (Array.isArray(params?.[prop])) {
+        params[prop] = this.resolveOrgName(params[prop]);
+      }
+      return params;
+    },
     renderOrganizationSearch(scope, prop = 'organizationName') {
-      return h(ElTreeSelect, {
-        modelValue: scope.row?.[prop] || '',
+      return h(ElCascader, {
+        modelValue: Array.isArray(scope.row?.[prop]) ? scope.row[prop] : [],
         'onUpdate:modelValue': value => {
-          if (scope.row) scope.row[prop] = value;
+          // 级联单选：modelValue 必须是 id 路径数组，否则控件内部状态会错乱导致无法再次选中
+          if (scope.row) scope.row[prop] = Array.isArray(value) ? value : [];
+        },
+        options: this.organizationTreeOptions,
+        props: {
+          label: 'label',
+          value: 'id',
+          children: 'children',
+          checkStrictly: true,
+          expandTrigger: 'click',
         },
-        data: this.organizationTreeOptions,
-        'node-key': 'id',
-        'check-strictly': true,
         filterable: true,
         clearable: true,
-        'render-after-expand': false,
         style: 'width: 100%',
         placeholder: '请选择 所属组织',
-        props: { label: 'label', value: 'id', children: 'children' },
       });
     },
   },
diff --git a/src/option/settlement/formalSettlementSearch.js b/src/option/settlement/formalSettlementSearch.js
index d516fa6..abe3520 100644
--- a/src/option/settlement/formalSettlementSearch.js
+++ b/src/option/settlement/formalSettlementSearch.js
@@ -38,7 +38,7 @@ export const formalSettlementSearchFields = [
   { label: '结算单号', prop: 'formalSettlementNo', type: 'input' },
   { label: '预结算单号', prop: 'preSettlementNo', type: 'input' },
   { label: '项目', prop: 'projectName', type: 'input' },
-  { label: '所属组织', prop: 'deptName', type: 'input' },
+  { label: '所属组织', prop: 'deptName', type: 'cascader' },
   { label: '合同编号', prop: 'contractNo', type: 'input' },
   { label: '付款方', prop: 'payerName', type: 'input' },
   { label: '收款方', prop: 'payeeName', type: 'input' },
diff --git a/src/option/settlement/preSettlementSearch.js b/src/option/settlement/preSettlementSearch.js
index 8e57a0e..1165ae9 100644
--- a/src/option/settlement/preSettlementSearch.js
+++ b/src/option/settlement/preSettlementSearch.js
@@ -10,7 +10,7 @@ export const preSettlementSearchFields = [
   { label: '预结算单号', prop: 'preSettlementNo', type: 'input' },
   { label: '预付单号', prop: 'advanceNo', type: 'input' },
   { label: '项目名称', prop: 'projectName', type: 'input' },
-  { label: '所属组织', prop: 'deptName', type: 'input' },
+  { label: '所属组织', prop: 'deptName', type: 'cascader' },
   { label: '合同名称', prop: 'contractName', type: 'input' },
   { label: '合同编号', prop: 'contractNo', type: 'input' },
   { label: '收款方', prop: 'payeeName', type: 'input' },
diff --git a/src/option/settlement/receivable-payable-detail.js b/src/option/settlement/receivable-payable-detail.js
index 9a5c212..dd91680 100644
--- a/src/option/settlement/receivable-payable-detail.js
+++ b/src/option/settlement/receivable-payable-detail.js
@@ -14,7 +14,7 @@ export const searchFields = [
   { label: '单据号', prop: 'documentNo', type: 'input' },
   { label: '生成日期', prop: 'generateDateRange', type: 'daterange' },
   { label: '客户名称', prop: 'customerName', type: 'input' },
-  { label: '所属组织', prop: 'deptName', type: 'input' },
+  { label: '所属组织', prop: 'deptName', type: 'cascader' },
   { label: '项目名称', prop: 'projectName', type: 'input' },
   { label: '货物类型', prop: 'cargoType', type: 'input' },
   { label: '货物名称', prop: 'cargoName', type: 'input' },
diff --git a/src/option/settlement/settlementAdjustmentSearch.js b/src/option/settlement/settlementAdjustmentSearch.js
index 5711fce..9208fd2 100644
--- a/src/option/settlement/settlementAdjustmentSearch.js
+++ b/src/option/settlement/settlementAdjustmentSearch.js
@@ -5,7 +5,7 @@ export const settlementAdjustmentSearchFields = [
   { label: '日期', prop: 'createDateRange', type: 'daterange' },
   { label: '客户名称', prop: 'customerName', type: 'input' },
   { label: '项目名称', prop: 'projectName', type: 'input' },
-  { label: '所属组织', prop: 'deptName', type: 'input' },
+  { label: '所属组织', prop: 'deptName', type: 'cascader' },
   { label: '关联结算单', prop: 'formalSettlementNo', type: 'input' },
   {
     label: '结算单类型',
diff --git a/src/option/settlement/transportReconciliationSearch.js b/src/option/settlement/transportReconciliationSearch.js
index ad0ee72..5577db4 100644
--- a/src/option/settlement/transportReconciliationSearch.js
+++ b/src/option/settlement/transportReconciliationSearch.js
@@ -15,7 +15,7 @@ export const transportReconciliationSearchFields = [
   { prop: 'reconciliationNo', label: '对账单号', type: 'input' },
   { prop: 'preSettlementNos', label: '预结算单号', type: 'input' },
   { prop: 'projectName', label: '项目', type: 'input' },
-  { prop: 'deptName', label: '所属组织', type: 'input' },
+  { prop: 'deptName', label: '所属组织', type: 'cascader' },
   { prop: 'contractNo', label: '合同编号', type: 'input' },
   { prop: 'payerName', label: '付款方', type: 'input' },
   { prop: 'payeeName', label: '收款方', type: 'input' },
diff --git a/src/styles/element-ui.scss b/src/styles/element-ui.scss
index 91f3b5e..cba5269 100644
--- a/src/styles/element-ui.scss
+++ b/src/styles/element-ui.scss
@@ -135,9 +135,10 @@
   //white-space: nowrap;
 }
 
-// 全宽兜底：搜索表单内树形下拉占满（覆盖默认搜索项宽度）
-// 注意：搜索 form 内的 el-tree-select 也走该规则；新增/编辑表单用 span=6 的栅格自然分开，不受影响。
-.avue-crud__search .el-form-item__content > .el-tree-select {
+// 全宽兜底：搜索表单内树形下拉 / 级联选择器占满（覆盖默认搜索项宽度）
+// 注意：搜索 form 内的 el-tree-select、el-cascader 均走该规则；新增/编辑表单用 span=6 的栅格自然分开，不受影响。
+.avue-crud__search .el-form-item__content > .el-tree-select,
+.avue-crud__search .el-form-item__content > .el-cascader {
   width: 100%;
   max-width: 100%;
 }
diff --git a/src/views/business/contract-manage.vue b/src/views/business/contract-manage.vue
index 7095ca7..d11064f 100644
--- a/src/views/business/contract-manage.vue
+++ b/src/views/business/contract-manage.vue
@@ -216,18 +216,14 @@
               </div>
             </el-form-item>
             <el-form-item label="所属组织" prop="organizationName">
-              <el-tree-select
-                v-model="selectedOrganizationId"
-                :data="organizationOptions"
-                :props="organizationTreeSelectProps"
-                node-key="id"
+              <el-cascader
+                v-model="organizationCascaderValue"
+                :options="organizationOptions"
+                :props="organizationCascaderProps"
                 placeholder="请选择"
-                check-strictly
                 clearable
                 filterable
-                :render-after-expand="false"
                 @visible-change="visible => visible && loadOrganizationOptions()"
-                @change="handleOrganizationChange"
               />
             </el-form-item>
             <el-form-item label="经办人">
@@ -794,7 +790,7 @@ import { getToken } from '@/utils/auth';
 import { downloadFileByUrl, downloadXls } from '@/utils/util';
 import BillingPlanEditor from './components/billing-plan-editor.vue';
 import PdfPreview from '@/components/pdf-preview/main.vue';
-import { ElImageViewer, ElTreeSelect } from 'element-plus';
+import { ElImageViewer, ElCascader } from 'element-plus';
 import { OpenFileViewer } from '@open-file-viewer/vue';
 import { fallbackPlugin, imagePlugin, officePlugin, textPlugin } from '@open-file-viewer/core';
 import '@open-file-viewer/core/style.css';
@@ -1230,13 +1226,32 @@ export default {
     contractFormatOptions() {
       return this.columnOptions('contractFormat');
     },
-    organizationTreeSelectProps() {
+    organizationCascaderProps() {
       return {
         label: 'label',
         value: 'id',
         children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
       };
     },
+    // 所属组织级联：selectedOrganizationId 存部门 id，级联控件用根到节点的 id 路径，
+    // 两者在此双向转换；依赖 organizationOptions，树加载完成后回显自动刷新
+    organizationCascaderValue: {
+      get() {
+        const id = this.selectedOrganizationId || this.form.organizationId;
+        if (!id) return [];
+        return this.findOrganizationPath(id) || [String(id)];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.selectedOrganizationId = value.length ? String(value.at(-1)) : '';
+        this.handleOrganizationChange(value);
+      },
+    },
     settlementRuleEnabled() {
       return Number(this.settlementRuleForm.autoGenerate) === 1;
     },
@@ -1728,6 +1743,18 @@ export default {
       const value = Array.isArray(id) ? id.at(-1) : id;
       return this.organizationFlatOptions.find(item => String(item.id) === String(value));
     },
+    // 由部门 id 反查「根 → 该节点」的 id 路径，供级联回显（找不到返回 null）
+    findOrganizationPath(id, tree = this.organizationOptions, parents = []) {
+      const target = Array.isArray(id) ? id.at(-1) : id;
+      if (target === undefined || target === null || target === '') return null;
+      for (const node of tree || []) {
+        const path = [...parents, String(node.id)];
+        if (String(node.id) === String(target)) return path;
+        const matched = this.findOrganizationPath(target, node.children, path);
+        if (matched) return matched;
+      }
+      return null;
+    },
     handleOrganizationChange(id) {
       const organization = this.findOrganization(id);
       Object.assign(
@@ -1752,21 +1779,26 @@ export default {
       this.organizationFlatOptions.unshift(item);
     },
     renderOrganizationSearch(scope) {
-      // 搜索区所属组织：树形下拉（与客户档案统一）
-      return h(ElTreeSelect, {
-        modelValue: scope.row?.organizationName || '',
+      // 搜索区所属组织：单选级联（与新增/编辑表单一致）
+      // 级联返回 id 路径数组，提交时由 normalizeSearch 取末级 id 转组织名称
+      return h(ElCascader, {
+        modelValue: Array.isArray(scope.row?.organizationName) ? scope.row.organizationName : [],
         'onUpdate:modelValue': value => {
-          if (scope.row) scope.row.organizationName = value;
+          // 级联单选：modelValue 必须是 id 路径数组，否则控件内部状态会错乱导致无法再次选中
+          if (scope.row) scope.row.organizationName = Array.isArray(value) ? value : [];
+        },
+        options: this.organizationOptions,
+        props: {
+          label: 'label',
+          value: 'id',
+          children: 'children',
+          checkStrictly: true,
+          expandTrigger: 'click',
         },
-        data: this.organizationOptions,
-        'node-key': 'id',
-        'check-strictly': true,
         filterable: true,
         clearable: true,
-        'render-after-expand': false,
         style: 'width: 100%',
         placeholder: '请选择 所属组织',
-        props: { label: 'label', value: 'id', children: 'children' },
       });
     },
     integerInput(prop, value) {
diff --git a/src/views/business/project-apply.vue b/src/views/business/project-apply.vue
index 07b74a0..4f5fd18 100644
--- a/src/views/business/project-apply.vue
+++ b/src/views/business/project-apply.vue
@@ -166,33 +166,25 @@
             />
           </el-form-item>
           <el-form-item label="业务部门" prop="businessDeptId">
-            <el-tree-select
-              v-model="form.businessDeptId"
-              :data="businessDeptTreeOptions"
-              :props="deptTreeSelectProps"
-              node-key="value"
+            <el-cascader
+              v-model="businessDeptCascaderValue"
+              :options="businessDeptTreeOptions"
+              :props="deptCascaderProps"
               placeholder="请选择业务部门"
-              check-strictly
               filterable
               clearable
-              :render-after-expand="false"
               :disabled="isBasicInfoReadonly"
-              @change="handleBusinessDeptChange"
             />
           </el-form-item>
           <el-form-item label="承办部门" prop="undertakeDeptId">
-            <el-tree-select
-              v-model="form.undertakeDeptId"
-              :data="deptTreeOptions"
-              :props="deptTreeSelectProps"
-              node-key="value"
+            <el-cascader
+              v-model="undertakeDeptCascaderValue"
+              :options="deptTreeOptions"
+              :props="deptCascaderProps"
               placeholder="请选择承办部门"
-              check-strictly
               clearable
               filterable
-              :render-after-expand="false"
               :disabled="isBasicInfoReadonly"
-              @change="handleUndertakeDeptChange"
             />
           </el-form-item>
           <el-form-item label="项目由来" prop="projectSource">
@@ -1047,11 +1039,6 @@ export default {
       deptOptions: [],
       businessDeptTreeOptions: [],
       deptTreeOptions: [],
-      deptTreeSelectProps: {
-        label: 'label',
-        value: 'value',
-        children: 'children',
-      },
       cargoTypeOptions: [],
       selectedCustomerId: [],
       selectedCarrierIds: [],
@@ -1110,6 +1097,45 @@ export default {
   },
   computed: {
     ...mapGetters(['permission', 'userInfo']),
+    // 部门级联配置：checkStrictly 允许选中任意层级，不必选到末级
+    deptCascaderProps() {
+      return {
+        label: 'label',
+        value: 'value',
+        children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
+      };
+    },
+    // 业务部门：form 存部门 id，级联控件用根到节点的 id 路径，两者在此双向转换
+    businessDeptCascaderValue: {
+      get() {
+        const id = this.form.businessDeptId;
+        return id ? this.findDeptPath(id, this.businessDeptTreeOptions) || [id] : [];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.form.businessDeptId = value.length ? value.at(-1) : '';
+        this.handleBusinessDeptChange(this.form.businessDeptId);
+      },
+    },
+    // 承办部门：同上
+    undertakeDeptCascaderValue: {
+      get() {
+        const id = this.form.undertakeDeptId;
+        return id ? this.findDeptPath(id, this.deptTreeOptions) || [id] : [];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.form.undertakeDeptId = value.length ? value.at(-1) : '';
+        this.handleUndertakeDeptChange(this.form.undertakeDeptId);
+      },
+    },
     permissionList() {
       return {
         addBtn: this.canCreate,
@@ -1843,15 +1869,30 @@ export default {
       return `${base}-BG${this.$dayjs().format('YYYYMMDD')}`;
     },
     handleBusinessDeptChange(value) {
-      const dept = this.deptOptions.find(item => item.value === value);
+      // 兼容级联路径数组（取末级）与单个部门 id
+      const id = Array.isArray(value) ? value.at(-1) : value;
+      const dept = this.deptOptions.find(item => String(item.value) === String(id));
       this.form.businessDeptName = dept ? dept.rawLabel : '';
       this.$refs.projectForm?.validateField('businessDeptId');
     },
     handleUndertakeDeptChange(value) {
-      const dept = this.deptOptions.find(item => item.value === value);
+      const id = Array.isArray(value) ? value.at(-1) : value;
+      const dept = this.deptOptions.find(item => String(item.value) === String(id));
       this.form.undertakeDeptName = dept ? dept.rawLabel : '';
       this.$refs.projectForm?.validateField('undertakeDeptId');
     },
+    // 由部门 id 反查「根 → 该节点」的 id 路径，供级联回显（找不到返回 null）
+    findDeptPath(id, tree = [], parents = []) {
+      const target = Array.isArray(id) ? id.at(-1) : id;
+      if (target === undefined || target === null || target === '') return null;
+      for (const node of tree || []) {
+        const path = [...parents, node.value];
+        if (String(node.value) === String(target)) return path;
+        const matched = this.findDeptPath(target, node.children, path);
+        if (matched) return matched;
+      }
+      return null;
+    },
     handleProjectTypeChange() {
       this.normalizeAttachmentFileTypes();
       this.$refs.projectForm?.validateField('projectType');
diff --git a/src/views/payment/bill-payment.vue b/src/views/payment/bill-payment.vue
index 7ce8f8e..d2ae35d 100644
--- a/src/views/payment/bill-payment.vue
+++ b/src/views/payment/bill-payment.vue
@@ -48,6 +48,7 @@ import BillPaymentTable from './components/bill-payment-table.vue';
 const emptyQuery = () => ({
   paymentNo: '',
   deptName: '',
+  deptPath: [],
   paymentDateRange: [],
   approvalStatus: '',
 });
diff --git a/src/views/payment/components/bill-payment-search.vue b/src/views/payment/components/bill-payment-search.vue
index 1d855ca..e395845 100644
--- a/src/views/payment/components/bill-payment-search.vue
+++ b/src/views/payment/components/bill-payment-search.vue
@@ -6,18 +6,15 @@
           <el-input v-model="query.paymentNo" clearable placeholder="请输入" />
         </el-form-item>
         <el-form-item label="使用部门">
-          <el-tree-select
-            :model-value="query.deptName"
-            :data="organizationTreeOptions"
-            node-key="id"
-            check-strictly
+          <el-cascader
+            v-model="query.deptPath"
+            :options="organizationTreeOptions"
+            :props="organizationCascaderProps"
             filterable
             clearable
-            render-after-expand
             style="width: 100%"
             placeholder="请选择 所属组织"
-            :props="{ label: 'label', value: 'id', children: 'children' }"
-            @update:model-value="val => { query.deptName = findOrgById(val)?.rawLabel || val }"
+            @change="val => { query.deptName = findOrgById(val)?.rawLabel || '' }"
           />
         </el-form-item>
         <el-form-item label="付款日期">
diff --git a/src/views/payment/invoice-application.vue b/src/views/payment/invoice-application.vue
index f9d8115..b701546 100644
--- a/src/views/payment/invoice-application.vue
+++ b/src/views/payment/invoice-application.vue
@@ -10,18 +10,15 @@
             <el-input v-model="query.projectName" clearable placeholder="请输入" />
           </el-form-item>
           <el-form-item label="所属组织">
-            <el-tree-select
-              :model-value="query.deptName"
-              :data="organizationTreeOptions"
-              node-key="id"
-              check-strictly
+            <el-cascader
+              v-model="query.deptPath"
+              :options="organizationTreeOptions"
+              :props="organizationCascaderProps"
               filterable
               clearable
-              render-after-expand
               style="width: 100%"
               placeholder="请选择 所属组织"
-              :props="{ label: 'label', value: 'id', children: 'children' }"
-              @update:model-value="val => { query.deptName = findOrgById(val)?.rawLabel || val }"
+              @change="val => { query.deptName = findOrgById(val)?.rawLabel || '' }"
             />
           </el-form-item>
           <el-form-item class="invoice-kingdee-item" label="金蝶单据状态">
@@ -252,6 +249,7 @@ const emptyQuery = () => ({
   applicationNo: '',
   projectName: '',
   deptName: '',
+  deptPath: [],
   kingdeeStatus: '',
   approvalStatus: '',
 });
diff --git a/src/views/payment/invoice-receipt.vue b/src/views/payment/invoice-receipt.vue
index 3f4f4b3..55f4acf 100644
--- a/src/views/payment/invoice-receipt.vue
+++ b/src/views/payment/invoice-receipt.vue
@@ -19,18 +19,15 @@
             <el-input v-model="query.projectName" clearable placeholder="请输入" />
           </el-form-item>
           <el-form-item label="所属组织">
-            <el-tree-select
-              :model-value="query.deptName"
-              :data="organizationTreeOptions"
-              node-key="id"
-              check-strictly
+            <el-cascader
+              v-model="query.deptPath"
+              :options="organizationTreeOptions"
+              :props="organizationCascaderProps"
               filterable
               clearable
-              render-after-expand
               style="width: 100%"
               placeholder="请选择 所属组织"
-              :props="{ label: 'label', value: 'id', children: 'children' }"
-              @update:model-value="val => { query.deptName = findOrgById(val)?.rawLabel || val }"
+              @change="val => { query.deptName = findOrgById(val)?.rawLabel || '' }"
             />
           </el-form-item>
           <el-form-item v-if="searchExpanded" label="审核状态">
@@ -245,6 +242,7 @@ const emptyQuery = () => ({
   invoiceDate: '',
   projectName: '',
   deptName: '',
+  deptPath: [],
   approvalStatus: '',
   kingdeeStatus: '',
 });
diff --git a/src/views/payment/payment-application.vue b/src/views/payment/payment-application.vue
index d53e918..27715b8 100644
--- a/src/views/payment/payment-application.vue
+++ b/src/views/payment/payment-application.vue
@@ -23,18 +23,15 @@
           /></el-form-item>
           <template v-if="searchExpanded">
             <el-form-item label="所属组织"
-              ><el-tree-select
-                :model-value="query.deptName"
-                :data="organizationTreeOptions"
-                node-key="id"
-                check-strictly
+              ><el-cascader
+                v-model="query.deptPath"
+                :options="organizationTreeOptions"
+                :props="organizationCascaderProps"
                 filterable
                 clearable
-                render-after-expand
                 style="width: 100%"
                 placeholder="请选择 所属组织"
-                :props="{ label: 'label', value: 'id', children: 'children' }"
-                @update:model-value="val => { query.deptName = findOrgById(val)?.rawLabel || val }"
+                @change="val => { query.deptName = findOrgById(val)?.rawLabel || '' }"
             /></el-form-item>
             <el-form-item label="关联结算单"
               ><el-input v-model="query.settlementNo" clearable
@@ -243,6 +240,7 @@ const emptyQuery = () => ({
   payeeName: '',
   projectName: '',
   deptName: '',
+  deptPath: [],
   settlementNo: '',
   paymentType: '',
   approvalStatus: '',
diff --git a/src/views/settlement/formal-settlement.vue b/src/views/settlement/formal-settlement.vue
index 058b4de..e37461c 100644
--- a/src/views/settlement/formal-settlement.vue
+++ b/src/views/settlement/formal-settlement.vue
@@ -27,6 +27,16 @@
                 :value="item.value"
               />
             </el-select>
+            <el-cascader
+              v-else-if="field.type === 'cascader'"
+              v-model="query[field.prop]"
+              :options="organizationTreeOptions"
+              :props="organizationCascaderProps"
+              clearable
+              filterable
+              style="width: 100%"
+              placeholder="请选择"
+            />
             <el-input v-else v-model="query[field.prop]" clearable placeholder="请输入" />
           </el-form-item>
           <div class="formal-page__search-actions">
@@ -168,6 +178,7 @@ import {
   formalSettlementSearchFields,
   paymentStatusOptions,
 } from '@/option/settlement/formalSettlementSearch';
+import organizationSearch from '@/mixins/organization-search';
 import { formalSettlementTableColumns } from '@/option/settlement/formalSettlementTable';
 import FormalSettlementEditor from './components/formal-settlement-editor.vue';
 import FormalSettlementTablePanel from './components/formal-settlement-table-panel.vue';
@@ -176,7 +187,7 @@ const emptyQuery = () => ({
   formalSettlementNo: '',
   preSettlementNo: '',
   projectName: '',
-  deptName: '',
+  deptName: [],
   contractNo: '',
   payerName: '',
   payeeName: '',
@@ -190,6 +201,7 @@ const emptyQuery = () => ({
 export default {
   name: 'FormalSettlement',
   components: { FormalSettlementEditor, FormalSettlementTablePanel },
+  mixins: [organizationSearch],
   data() {
     return {
       ArrowDown,
@@ -231,6 +243,7 @@ export default {
     },
   },
   mounted() {
+    this.loadOrganizationOptions();
     this.loadTable();
     this.openRouteDetail();
   },
@@ -517,7 +530,8 @@ export default {
       XLSX.writeFile(workbook, `正式结算单${this.$dayjs().format('YYYY-MM-DD HH-mm-ss')}.xlsx`);
     },
     buildQueryParams() {
-      const params = { ...this.query };
+      // 所属组织级联返回 id 路径，转成组织名称传给后端（用副本，避免污染搜索框回显）
+      const params = this.normalizeOrganizationSearch({ ...this.query }, 'deptName');
       params.settlementType = this.activeSettlementType;
       const range = params.createDateRange || [];
       delete params.createDateRange;
diff --git a/src/views/settlement/pre-settlement.vue b/src/views/settlement/pre-settlement.vue
index c73b7d9..27c9b70 100644
--- a/src/views/settlement/pre-settlement.vue
+++ b/src/views/settlement/pre-settlement.vue
@@ -29,6 +29,16 @@
                   :value="item.value"
                 />
               </el-select>
+              <el-cascader
+                v-else-if="field.type === 'cascader'"
+                v-model="query[field.prop]"
+                :options="organizationTreeOptions"
+                :props="organizationCascaderProps"
+                clearable
+                filterable
+                style="width: 100%"
+                placeholder="请选择"
+              />
               <el-input v-else v-model="query[field.prop]" clearable placeholder="请输入" />
             </el-form-item>
           </template>
@@ -283,6 +293,7 @@ import {
   voidBill,
 } from '@/api/settlement/preSettlement';
 import { preSettlementSearchFields } from '@/option/settlement/preSettlementSearch';
+import organizationSearch from '@/mixins/organization-search';
 import { preSettlementTableColumns } from '@/option/settlement/preSettlementTable';
 import { createSettlementTransfer } from '@/utils/settlement-transfer';
 import { downloadFile } from '@/utils/util';
@@ -292,7 +303,7 @@ const emptyQuery = () => ({
   preSettlementNo: '',
   advanceNo: '',
   projectName: '',
-  deptName: '',
+  deptName: [],
   contractName: '',
   contractNo: '',
   payeeName: '',
@@ -304,6 +315,7 @@ const emptyQuery = () => ({
 export default {
   name: 'PreSettlement',
   components: { PreSettlementEditor },
+  mixins: [organizationSearch],
   data() {
     return {
       ArrowDown,
@@ -357,6 +369,7 @@ export default {
     },
   },
   created() {
+    this.loadOrganizationOptions();
     this.loadTable();
     this.openRouteDetail();
   },
@@ -377,8 +390,10 @@ export default {
     },
     buildQuery() {
       const range = this.query.createDateRange || [];
+      // 所属组织级联返回 id 路径，转成组织名称传给后端（用副本，避免污染搜索框回显）
+      const query = this.normalizeOrganizationSearch({ ...this.query }, 'deptName');
       return {
-        ...this.query,
+        ...query,
         createDateRange: undefined,
         createStartDate: range[0],
         createEndDate: range[1],
diff --git a/src/views/settlement/settlement-adjustment.vue b/src/views/settlement/settlement-adjustment.vue
index c715186..752e7a2 100644
--- a/src/views/settlement/settlement-adjustment.vue
+++ b/src/views/settlement/settlement-adjustment.vue
@@ -25,6 +25,16 @@
                 :label="item.label"
                 :value="item.value"
             /></el-select>
+            <el-cascader
+              v-else-if="field.type === 'cascader'"
+              v-model="query[field.prop]"
+              :options="organizationTreeOptions"
+              :props="organizationCascaderProps"
+              clearable
+              filterable
+              style="width: 100%"
+              placeholder="请选择"
+            />
             <el-input v-else v-model="query[field.prop]" clearable placeholder="请输入" />
           </el-form-item>
           <div class="settlement-adjustment-page__search-actions">
@@ -159,6 +169,7 @@ import { ArrowDown, ArrowUp, Refresh } from '@element-plus/icons-vue';
 import { mapGetters } from 'vuex';
 import * as api from '@/api/settlement/settlementAdjustment';
 import { settlementAdjustmentSearchFields } from '@/option/settlement/settlementAdjustmentSearch';
+import organizationSearch from '@/mixins/organization-search';
 import { settlementAdjustmentTableColumns } from '@/option/settlement/settlementAdjustmentTable';
 import SettlementAdjustmentEditor from './components/settlement-adjustment-editor.vue';
 
@@ -167,7 +178,7 @@ const emptyQuery = () => ({
   createDateRange: [],
   customerName: '',
   projectName: '',
-  deptName: '',
+  deptName: [],
   formalSettlementNo: '',
   settlementType: '',
   approvalStatus: '',
@@ -175,6 +186,7 @@ const emptyQuery = () => ({
 export default {
   name: 'SettlementAdjustment',
   components: { SettlementAdjustmentEditor },
+  mixins: [organizationSearch],
   data: () => ({
     ArrowDown,
     ArrowUp,
@@ -199,6 +211,7 @@ export default {
     },
   },
   created() {
+    this.loadOrganizationOptions();
     this.loadTable();
   },
   methods: {
@@ -210,7 +223,8 @@ export default {
       try {
         const range = this.query.createDateRange || [];
         const { data } = await api.getList(this.page.current, this.page.size, {
-          ...this.query,
+          // 所属组织级联返回 id 路径，转成组织名称传给后端（用副本，避免污染搜索框回显）
+          ...this.normalizeOrganizationSearch({ ...this.query }, 'deptName'),
           createDateRange: undefined,
           createStartDate: range[0],
           createEndDate: range[1],
diff --git a/src/views/settlement/transport-reconciliation.vue b/src/views/settlement/transport-reconciliation.vue
index 4ad2554..0a87b48 100644
--- a/src/views/settlement/transport-reconciliation.vue
+++ b/src/views/settlement/transport-reconciliation.vue
@@ -17,6 +17,16 @@
                 :value="item.value"
               />
             </el-select>
+            <el-cascader
+              v-else-if="field.type === 'cascader'"
+              v-model="query[field.prop]"
+              :options="organizationTreeOptions"
+              :props="organizationCascaderProps"
+              clearable
+              filterable
+              style="width: 100%"
+              placeholder="请选择"
+            />
             <el-input v-else v-model="query[field.prop]" clearable placeholder="请输入" />
           </el-form-item>
         </div>
@@ -87,6 +97,7 @@ import * as XLSX from 'xlsx';
 import * as api from '@/api/settlement/transportReconciliation';
 import { transportReconciliationSearchFields } from '@/option/settlement/transportReconciliationSearch';
 import { transportReconciliationTableColumns } from '@/option/settlement/transportReconciliationTable';
+import organizationSearch from '@/mixins/organization-search';
 import TransportReconciliationEditor from './components/transport-reconciliation-editor.vue';
 import TransportReconciliationTablePanel from './components/transport-reconciliation-table-panel.vue';
 
@@ -94,7 +105,7 @@ const emptyQuery = () => ({
   reconciliationNo: '',
   preSettlementNos: '',
   projectName: '',
-  deptName: '',
+  deptName: [],
   contractNo: '',
   payerName: '',
   payeeName: '',
@@ -105,6 +116,7 @@ const emptyQuery = () => ({
 export default {
   name: 'TransportReconciliation',
   components: { TransportReconciliationEditor, TransportReconciliationTablePanel },
+  mixins: [organizationSearch],
   data() {
     return {
       ArrowDown,
@@ -129,6 +141,7 @@ export default {
     },
   },
   mounted() {
+    this.loadOrganizationOptions();
     this.loadTable();
   },
   methods: {
@@ -139,7 +152,8 @@ export default {
       this.loading = true;
       try {
         const response = await api.getList(this.page.current, this.page.size, {
-          ...this.query,
+          // 所属组织级联返回 id 路径，转成组织名称传给后端（用副本，避免污染搜索框回显）
+          ...this.normalizeOrganizationSearch({ ...this.query }, 'deptName'),
           settlementType: this.settlementType,
         });
         const data = response?.data?.data || response?.data || response || {};
diff --git a/src/views/system/user.vue b/src/views/system/user.vue
index 0bc6c36..933f6a0 100644
--- a/src/views/system/user.vue
+++ b/src/views/system/user.vue
@@ -195,7 +195,7 @@
                 <el-col :span="6"><el-form-item label="邮箱"><el-input v-model="form.email" /></el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="性别"><el-select v-model="form.sex"><el-option label="男" :value="1" /><el-option label="女" :value="2" /><el-option label="未知" :value="3" /></el-select></el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="岗位" prop="postId"><el-tree-select v-model="form.postId" :data="postList" :props="{ label: 'postName', value: 'id' }" check-strictly /></el-form-item></el-col>
-                <el-col :span="6"><el-form-item label="所属组织" prop="deptId"><el-tree-select v-model="form.deptId" :data="permissionDeptTree" :props="{ label: 'title', value: 'id' }" multiple check-strictly show-checkbox /></el-form-item></el-col>
+                <el-col :span="6"><el-form-item label="所属组织" prop="deptId"><el-cascader v-model="deptCascaderValue" :options="permissionDeptTree" :props="deptCascaderProps" clearable filterable placeholder="请选择 所属组织" /></el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="工号"><el-input v-model="form.code" /></el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="人员类别"><el-select v-model="form.personCategory"><el-option label="内部员工" :value="1" /><el-option label="承运商" :value="2" /></el-select></el-form-item></el-col>
                 <el-col :span="18"><el-form-item label="数据权限范围"><el-radio-group v-model="form.dataScopeRange"><el-radio :value="1">仅所属组织</el-radio><el-radio :value="2">全部组织</el-radio><el-radio :value="3">自定义</el-radio></el-radio-group></el-form-item></el-col>
@@ -443,6 +443,36 @@ export default {
   },
   computed: {
     ...mapGetters(['userInfo', 'permission']),
+    // 所属组织级联配置：checkStrictly 允许选中任意层级，不必选到末级
+    deptCascaderProps() {
+      return {
+        label: 'title',
+        value: 'id',
+        children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
+      };
+    },
+    // 所属组织为单选级联：form.deptId 仍为数组（提交时 join），此处与 id 路径双向转换
+    deptCascaderValue: {
+      get() {
+        const ids = Array.isArray(this.form.deptId)
+          ? this.form.deptId
+          : this.form.deptId
+            ? [this.form.deptId]
+            : [];
+        const id = ids.find(item => item !== undefined && item !== null && item !== '');
+        return id === undefined ? [] : this.findDeptPath(id) || [id];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.form.deptId = value.length ? [value.at(-1)] : [];
+        this.$refs.userFormRef?.validateField('deptId');
+      },
+    },
     permissionList() {
       return {
         addBtn: this.validData(this.permission.user_add, false),
@@ -565,6 +595,18 @@ export default {
         this.customerList = res.data.data || [];
       });
     },
+    // 由部门 id 反查「根 → 该节点」的 id 路径，供级联回显（找不到返回 null）
+    findDeptPath(id, tree = this.permissionDeptTree, parents = []) {
+      const target = Array.isArray(id) ? id.at(-1) : id;
+      if (target === undefined || target === null || target === '') return null;
+      for (const node of tree || []) {
+        const path = [...parents, node.id];
+        if (String(node.id) === String(target)) return path;
+        const matched = this.findDeptPath(target, node.children, path);
+        if (matched) return matched;
+      }
+      return null;
+    },
     submitRole() {
       const roleList = this.$refs.treeRole.getCheckedKeys().join(',');
       if (this.roleFormMode) {
diff --git a/src/views/transportCapacity/driver.vue b/src/views/transportCapacity/driver.vue
index 6a63be0..94259fc 100644
--- a/src/views/transportCapacity/driver.vue
+++ b/src/views/transportCapacity/driver.vue
@@ -490,14 +490,14 @@
             </el-col>
             <el-col :span="6">
               <el-form-item label="所属组织" prop="organizationName">
-                <el-select v-model="driverForm.organizationName" clearable filterable>
-                  <el-option
-                    v-for="item in organizationOptions"
-                    :key="item.value"
-                    :label="item.label"
-                    :value="item.value"
-                  />
-                </el-select>
+                <el-cascader
+                  v-model="organizationCascaderValue"
+                  :options="organizationTreeOptions"
+                  :props="organizationCascaderProps"
+                  filterable
+                  clearable
+                  placeholder="请选择 所属组织"
+                />
               </el-form-item>
             </el-col>
           </el-row>
@@ -815,6 +815,15 @@ export default {
   },
   computed: {
     ...mapGetters(['permission', 'userInfo']),
+    // 所属组织级联：表单存组织名称，级联控件用 id 路径，两者在此双向转换
+    organizationCascaderValue: {
+      get() {
+        return this.resolveOrgPath(this.driverForm.organizationName);
+      },
+      set(path) {
+        this.driverForm.organizationName = this.resolveOrgName(path);
+      },
+    },
     isAdmin() {
       const authority = this.userInfo.authority || '';
       return authority.includes('admin');
@@ -1613,6 +1622,8 @@ export default {
       this.onLoad(this.page);
     },
     searchChange(params, done) {
+      // 所属组织级联返回的是 id 路径，转成组织名称传给后端
+      this.normalizeOrganizationSearch(params);
       this.searchForm = params;
       this.page.currentPage = 1;
       this.onLoad(this.page, params);
diff --git a/src/views/transportCapacity/ship.vue b/src/views/transportCapacity/ship.vue
index 255570f..07b1912 100644
--- a/src/views/transportCapacity/ship.vue
+++ b/src/views/transportCapacity/ship.vue
@@ -145,19 +145,14 @@
           <el-row :gutter="18">
             <el-col :span="6">
               <el-form-item label="船舶所属组织" prop="organizationName">
-                <el-select
-                  v-model="shipForm.organizationName"
+                <el-cascader
+                  v-model="organizationCascaderValue"
+                  :options="organizationTreeOptions"
+                  :props="organizationCascaderProps"
                   filterable
                   clearable
-                  placeholder="请选择"
-                >
-                  <el-option
-                    v-for="item in organizationOptions"
-                    :key="item.value"
-                    :label="item.label"
-                    :value="item.value"
-                  />
-                </el-select>
+                  placeholder="请选择 船舶所属组织"
+                />
               </el-form-item>
             </el-col>
             <el-col :span="6">
@@ -707,6 +702,15 @@ export default {
   },
   computed: {
     ...mapGetters(['permission', 'userInfo']),
+    // 船舶所属组织级联：表单存组织名称，级联控件用 id 路径，两者在此双向转换
+    organizationCascaderValue: {
+      get() {
+        return this.resolveOrgPath(this.shipForm.organizationName);
+      },
+      set(path) {
+        this.shipForm.organizationName = this.resolveOrgName(path);
+      },
+    },
     isAdmin() {
       const authority = this.userInfo.authority || '';
       return authority.includes('admin');
@@ -1100,6 +1104,8 @@ export default {
       this.onLoad(this.page);
     },
     searchChange(params, done) {
+      // 所属组织级联返回的是 id 路径，转成组织名称传给后端
+      this.normalizeOrganizationSearch(params);
       this.searchForm = params;
       this.page.currentPage = 1;
       this.onLoad(this.page, params);
diff --git a/src/views/transportCapacity/vehicle.vue b/src/views/transportCapacity/vehicle.vue
index 6c8dbca..8026573 100644
--- a/src/views/transportCapacity/vehicle.vue
+++ b/src/views/transportCapacity/vehicle.vue
@@ -159,19 +159,14 @@
           <el-row :gutter="18">
             <el-col :span="24">
               <el-form-item label="所有组织" prop="organizationName">
-                <el-select
-                  v-model="vehicleForm.organizationName"
+                <el-cascader
+                  v-model="organizationCascaderValue"
+                  :options="organizationTreeOptions"
+                  :props="organizationCascaderProps"
                   filterable
                   clearable
-                  placeholder="请选择"
-                >
-                  <el-option
-                    v-for="item in organizationOptions"
-                    :key="item.value"
-                    :label="item.label"
-                    :value="item.value"
-                  />
-                </el-select>
+                  placeholder="请选择 所属组织"
+                />
               </el-form-item>
             </el-col>
           </el-row>
@@ -709,6 +704,15 @@ export default {
   },
   computed: {
     ...mapGetters(['permission', 'userInfo']),
+    // 所属组织级联：表单存组织名称，级联控件用 id 路径，两者在此双向转换
+    organizationCascaderValue: {
+      get() {
+        return this.resolveOrgPath(this.vehicleForm.organizationName);
+      },
+      set(path) {
+        this.vehicleForm.organizationName = this.resolveOrgName(path);
+      },
+    },
     isAdmin() {
       const authority = this.userInfo.authority || '';
       return authority.includes('admin');
@@ -1275,6 +1279,8 @@ export default {
       this.onLoad(this.page);
     },
     searchChange(params, done) {
+      // 所属组织级联返回的是 id 路径，转成组织名称传给后端
+      this.normalizeOrganizationSearch(params);
       this.searchForm = params;
       this.page.currentPage = 1;
       this.onLoad(this.page, params);
diff --git a/src/views/vehicle/customer-archive.vue b/src/views/vehicle/customer-archive.vue
index 4211c7b..aad44d4 100644
--- a/src/views/vehicle/customer-archive.vue
+++ b/src/views/vehicle/customer-archive.vue
@@ -335,17 +335,13 @@
             </el-col>
             <el-col :span="6">
               <el-form-item label="所属组织" prop="deptName">
-                <el-tree-select
-                  v-model="archiveForm.deptId"
-                  :data="deptTree"
-                  :props="{ label: 'label', value: 'value', children: 'children' }"
-                  multiple
-                  node-key="value"
-                  check-strictly
-                  filterable
+                <el-cascader
+                  v-model="deptCascaderValue"
+                  :options="deptTree"
+                  :props="deptCascaderProps"
                   clearable
-                  :render-after-expand="false"
-                  @change="onDeptChange"
+                  filterable
+                  placeholder="请选择 所属组织"
                 />
               </el-form-item>
             </el-col>
@@ -1367,7 +1363,7 @@
 
 <script>
 import { h } from 'vue';
-import { ElTreeSelect } from 'element-plus';
+import { ElCascader } from 'element-plus';
 import {
   getList,
   getDetail,
@@ -1875,6 +1871,34 @@ export default {
         emitPath: true,
       };
     },
+    deptCascaderProps() {
+      return {
+        value: 'value',
+        label: 'label',
+        children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
+      };
+    },
+    // 所属组织级联值：archiveForm.deptId 只存选中的部门 ID（单选），
+    // 级联控件需要根到选中节点的完整路径，两者在此做双向转换——
+    // 部门树是异步加载的，依赖 deptTree 可保证树加载完成后回显自动刷新。
+    deptCascaderValue: {
+      get() {
+        const ids = Array.isArray(this.archiveForm.deptId)
+          ? this.archiveForm.deptId
+          : this.archiveForm.deptId
+            ? [this.archiveForm.deptId]
+            : [];
+        const currentId = ids.length ? String(ids[ids.length - 1]) : '';
+        if (!currentId) return [];
+        return this.findDeptPath(currentId) || [currentId];
+      },
+      set(path) {
+        this.onDeptChange(path);
+      },
+    },
     ids() {
       let ids = [];
       this.selectionList.forEach(ele => {
@@ -2645,38 +2669,57 @@ export default {
       this.onDeptChange([firstTopLevelDept.value]);
     },
     onDeptChange(value) {
-      const deptIds = Array.isArray(value) ? value : value ? [value] : [];
-      const deptNames = deptIds
-        .map(id => this.deptOptions.find(item => String(item.value) === String(id))?.rawLabel)
-        .filter(Boolean);
-      this.archiveForm.deptId = deptIds;
-      this.archiveForm.deptIds = deptIds.join(',');
-      this.archiveForm.deptName = deptNames.join(',');
+      // 级联单选：value 为根到选中节点的 ID 路径，取末级作为客商所属组织
+      const path = Array.isArray(value)
+        ? value.filter(item => item !== undefined && item !== null && item !== '')
+        : [];
+      const deptId = path.length ? String(path[path.length - 1]) : '';
+      this.archiveForm.deptId = deptId ? [deptId] : [];
+      this.archiveForm.deptIds = deptId;
+      this.archiveForm.deptName = deptId ? this.findDeptLabel(deptId) : '';
       this.$refs.archiveForm?.validateField('deptName');
     },
+    findDeptPath(id, tree = this.deptTree, parents = []) {
+      for (const node of tree || []) {
+        const path = [...parents, String(node.value)];
+        if (String(node.value) === String(id)) return path;
+        const children = node.children || [];
+        if (children.length) {
+          const matched = this.findDeptPath(id, children, path);
+          if (matched) return matched;
+        }
+      }
+      return null;
+    },
+    findDeptLabel(id, tree = this.deptTree) {
+      for (const node of tree || []) {
+        if (String(node.value) === String(id)) return node.label;
+        const matched = this.findDeptLabel(id, node.children || []);
+        if (matched) return matched;
+      }
+      return '';
+    },
     renderDeptSearch(scope) {
-      // 搜索区所属组织：多选树形下拉（与新增/编辑表单一致）
-      // 多选返回 ID 数组，转换为部门名称按逗号拼接写入 searchForm.deptName
-      return h(ElTreeSelect, {
+      // 搜索区所属组织：单选级联（与新增/编辑表单一致）
+      // 级联返回的是根到选中节点的 ID 路径数组，提交时取末级 ID 转部门名称
+      return h(ElCascader, {
         modelValue: Array.isArray(scope.row?.deptName) ? scope.row.deptName : [],
         'onUpdate:modelValue': value => {
-          // 多选模式：modelValue 必须是 ID 数组，否则 el-tree-select 内部状态会错乱导致无法再次选中
-          const ids = Array.isArray(value) ? value : value ? [value] : [];
-          if (scope.row) scope.row.deptName = ids;
+          // 级联单选：modelValue 必须是 ID 路径数组，否则控件内部状态会错乱导致无法再次选中
+          if (scope.row) scope.row.deptName = Array.isArray(value) ? value : [];
+        },
+        options: this.deptTree,
+        props: {
+          label: 'label',
+          value: 'value',
+          children: 'children',
+          checkStrictly: true,
+          expandTrigger: 'click',
         },
-        data: this.deptTree,
-        'node-key': 'value',
-        'check-strictly': true,
-        multiple: true,
         filterable: true,
         clearable: true,
-        'render-after-expand': false,
-        collapseTags: true,
-        'collapse-tags-tooltip': true,
-        'default-expand-all': false,
         style: 'width: 100%',
         placeholder: '请选择 所属组织',
-        props: { label: 'label', value: 'value', children: 'children' },
       });
     },
     handleNoFixedTermChange(checked) {
@@ -2717,13 +2760,15 @@ export default {
         : [];
     },
     normalizeDeptIds(detail) {
+      // 所属组织为单选级联，只保留第一个部门 ID（历史多选数据自动收敛）
       const value = detail.deptIds || detail.deptId;
-      return value
+      const ids = value
         ? String(value)
             .split(',')
             .map(item => item.trim())
             .filter(item => item !== '')
         : [];
+      return ids.length ? [ids[0]] : [];
     },
     formatArchiveAddress(archive = {}) {
       return [archive.registeredRegionName, archive.registeredDetailAddress]
@@ -4539,12 +4584,15 @@ export default {
       this.onLoad(this.page);
     },
     searchChange(params, done) {
-      // 搜索区所属组织多选返回的是部门 ID 数组，需转成部门名称逗号串传给后端（与列表接口 deptName 字段一致）
+      // 搜索区所属组织级联返回的是 ID 路径数组，取末级 ID 转成部门名称传给后端（与列表接口 deptName 字段一致）
       if (Array.isArray(params.deptName)) {
-        params.deptName = params.deptName
-          .map(id => this.deptOptions.find(item => String(item.value) === String(id))?.rawLabel)
-          .filter(Boolean)
-          .join(',');
+        const path = params.deptName.filter(
+          item => item !== undefined && item !== null && item !== ''
+        );
+        const deptId = path.length ? path[path.length - 1] : '';
+        params.deptName = deptId
+          ? this.deptOptions.find(item => String(item.value) === String(deptId))?.rawLabel || ''
+          : '';
       }
       this.query = this.buildQuery(params);
       this.page.currentPage = 1;
diff --git a/vite.config.mjs b/vite.config.mjs
index 1726a3c..45a377c 100644
--- a/vite.config.mjs
+++ b/vite.config.mjs
@@ -47,26 +47,26 @@ export default ({ mode, command }) => {
       __VUE_I18N_LEGACY_API__: true,
       __INTLIFY_PROD_DEVTOOLS__: false,
     },
-    server: {
-      port: 2888,
-      proxy: {
-        '/api': {
-          target: 'http://localhost',
-          //target: 'https://saber3.bladex.cn/api',
-          changeOrigin: true,
-          rewrite: path => path.replace(/^\/api/, ''),
-        },
-      },
-    },
     // server: {
-    //   port: 2889,
+    //   port: 2888,
     //   proxy: {
     //     '/api': {
-    //       target: 'http://172.16.203.228:8000',
+    //       target: 'http://localhost',
+    //       //target: 'https://saber3.bladex.cn/api',
     //       changeOrigin: true,
+    //       rewrite: path => path.replace(/^\/api/, ''),
     //     },
     //   },
     // },
+    server: {
+      port: 2889,
+      proxy: {
+        '/api': {
+          target: 'http://172.16.203.228:8000',
+          changeOrigin: true,
+        },
+      },
+    },
     resolve: {
       alias: {
         '~': resolve(__dirname, './'),