diff --git a/src/views/study-tours/StudyTourList.vue b/src/views/study-tours/StudyTourList.vue
index 552126b..be2d85f 100644
--- a/src/views/study-tours/StudyTourList.vue
+++ b/src/views/study-tours/StudyTourList.vue
@@ -32,7 +32,7 @@ type StudyTour = {
   org_name?: string
   seasons?: string[]
   suitable_count?: string
-  grade_levels?: string[]
+  suitable_audience?: string
   duration?: string
   contact_person?: string
   contact_phones?: string
@@ -54,13 +54,12 @@ const editId = ref<number | null>(null)
 const rows = ref<StudyTour[]>([])
 const venues = ref<Venue[]>([])
 const seasonOptions = ref<DictOption[]>([])
-const gradeOptions = ref<DictOption[]>([])
 const currentUser = ref<{ role: string } | null>(null)
 const filterKeyword = ref('')
 const filterVenueId = ref<number | undefined>(undefined)
 const filterOnShelf = ref<string | undefined>(undefined)
 const filterSeason = ref<string | undefined>(undefined)
-const filterGradeLevel = ref<string | undefined>(undefined)
+const filterSuitableAudience = ref('')
 const filterOrgName = ref('')
 const listPagination = reactive({ current: 1, pageSize: 10 })
 const MODAL_BODY_HEIGHT = '72vh'
@@ -86,7 +85,7 @@ const form = reactive({
   org_name: '',
   seasons: [] as string[],
   suitable_count: '',
-  grade_levels: [] as string[],
+  suitable_audience: '',
   duration: '',
   contact_person: '',
   contact_phones: '',
@@ -114,7 +113,7 @@ function formSignature() {
     org_name: form.org_name,
     seasons: form.seasons,
     suitable_count: form.suitable_count,
-    grade_levels: form.grade_levels,
+    suitable_audience: form.suitable_audience,
     duration: form.duration,
     contact_person: form.contact_person,
     contact_phones: form.contact_phones,
@@ -288,6 +287,16 @@ const introEditorOptions = buildEditorOptions('请输入线路简介')
 const feeEditorOptions = buildEditorOptions('请输入线路收费标准')
 const implEditorOptions = buildEditorOptions('请输入线路计划实施情况')
 
+function suitableAudienceFromRow(row: StudyTour): string {
+  const text = String(row.suitable_audience || '').trim()
+  if (text) return text
+  const legacy = (row as StudyTour & { grade_levels?: string[] }).grade_levels
+  if (Array.isArray(legacy) && legacy.length) {
+    return legacy.join('，')
+  }
+  return ''
+}
+
 function resetForm() {
   form.name = ''
   form.tags = []
@@ -295,7 +304,7 @@ function resetForm() {
   form.org_name = ''
   form.seasons = []
   form.suitable_count = ''
-  form.grade_levels = []
+  form.suitable_audience = ''
   form.duration = ''
   form.contact_person = ''
   form.contact_phones = ''
@@ -321,7 +330,7 @@ function fillFormFromRow(row: StudyTour) {
   form.org_name = row.org_name || ''
   form.seasons = Array.isArray(row.seasons) ? [...row.seasons] : []
   form.suitable_count = row.suitable_count || ''
-  form.grade_levels = Array.isArray(row.grade_levels) ? [...row.grade_levels] : []
+  form.suitable_audience = suitableAudienceFromRow(row)
   form.duration = row.duration || ''
   form.contact_person = row.contact_person || ''
   form.contact_phones = row.contact_phones || ''
@@ -537,12 +546,8 @@ function isVenueAdmin() {
 }
 
 async function loadDicts() {
-  const [seasonRes, gradeRes] = await Promise.all([
-    http.get('/dict-items', { params: { dict_type: 'study_tour_season', active_only: 1 } }),
-    http.get('/dict-items', { params: { dict_type: 'study_tour_grade_level', active_only: 1 } }),
-  ])
+  const seasonRes = await http.get('/dict-items', { params: { dict_type: 'study_tour_season', active_only: 1 } })
   seasonOptions.value = seasonRes.data || []
-  gradeOptions.value = gradeRes.data || []
 }
 
 async function loadMe() {
@@ -559,7 +564,8 @@ async function loadData(keepCurrentPage = false) {
     if (filterVenueId.value != null && filterVenueId.value > 0) params.venue_id = filterVenueId.value
     if (filterOnShelf.value === '0' || filterOnShelf.value === '1') params.is_on_shelf = filterOnShelf.value
     if (filterSeason.value) params.season = filterSeason.value
-    if (filterGradeLevel.value) params.grade_level = filterGradeLevel.value
+    const audience = filterSuitableAudience.value.trim()
+    if (audience) params.suitable_audience = audience
     const org = filterOrgName.value.trim()
     if (org) params.org_name = org
 
@@ -723,7 +729,7 @@ function buildPayload() {
     org_name: form.org_name.trim(),
     seasons: [...form.seasons],
     suitable_count: form.suitable_count.trim(),
-    grade_levels: [...form.grade_levels],
+    suitable_audience: form.suitable_audience.trim(),
     duration: form.duration.trim(),
     contact_person: form.contact_person.trim(),
     contact_phones: form.contact_phones.trim(),
@@ -852,9 +858,14 @@ onMounted(async () => {
       <a-select v-model="filterSeason" placeholder="季节" allow-clear style="width: 120px" @change="loadData">
         <a-option v-for="item in seasonOptions" :key="item.item_value" :value="item.item_value">{{ item.item_label }}</a-option>
       </a-select>
-      <a-select v-model="filterGradeLevel" placeholder="学段" allow-clear style="width: 120px" @change="loadData">
-        <a-option v-for="item in gradeOptions" :key="item.item_value" :value="item.item_value">{{ item.item_label }}</a-option>
-      </a-select>
+      <a-input
+        v-model="filterSuitableAudience"
+        placeholder="适配人群"
+        style="width: 140px"
+        allow-clear
+        @press-enter="loadData"
+        @clear="loadData"
+      />
       <a-select v-model="filterOnShelf" placeholder="上架状态" allow-clear style="width: 120px" @change="loadData">
         <a-option value="1">上架</a-option>
         <a-option value="0">下架</a-option>
@@ -963,10 +974,8 @@ onMounted(async () => {
                   <a-option v-for="item in seasonOptions" :key="item.item_value" :value="item.item_value">{{ item.item_label }}</a-option>
                 </a-select>
               </a-form-item>
-              <a-form-item label="适配学段（多选）">
-                <a-select v-model="form.grade_levels" multiple allow-clear placeholder="请选择">
-                  <a-option v-for="item in gradeOptions" :key="item.item_value" :value="item.item_value">{{ item.item_label }}</a-option>
-                </a-select>
+              <a-form-item label="适配人群">
+                <a-input v-model="form.suitable_audience" placeholder="如 小学，初中；多个以逗号分隔" />
               </a-form-item>
               <a-form-item label="研学时长"><a-input v-model="form.duration" placeholder="如 3天2晚、单日6小时" /></a-form-item>
               <a-form-item label="线路联络人"><a-input v-model="form.contact_person" /></a-form-item>