diff --git a/web-admin/scripts/quota-mobile-state.test.ts b/web-admin/scripts/quota-mobile-state.test.ts
index 2851ed2b6..79daf5b37 100644
--- a/web-admin/scripts/quota-mobile-state.test.ts
+++ b/web-admin/scripts/quota-mobile-state.test.ts
@@ -350,3 +350,28 @@ test('plan expansion loads on demand, preserves total during refresh and ignores
   assert.deepEqual(Object.keys(s.details), [])
   h.stop()
 })
+
+for (const status of [403, 404, 500, undefined])
+  test(`plan expansion reports ${status || 'network'} failure without showing partial usage`, async () => {
+    const h = pageHarness('quota', { mobile: false }),
+      s = h.state
+    const pending = s.loadDetail('plan')
+    h.gets[0].reject(status ? { response: { status } } : new Error('network'))
+    await pending
+    assert.equal(
+      s.details.plan.error,
+      [403, 404].includes(status as number)
+        ? '计划或证件不可读取，无法展示完整用证详情'
+        : '段次用证加载失败，请重试'
+    )
+    assert.equal(s.details.plan.data, undefined)
+    assert.equal(s.details.plan.loading, false)
+    if (status === 500) {
+      const retry = s.loadDetail('plan')
+      h.gets[1].resolve({ planId: 'plan', sourceOptions: [], usages: [] })
+      await retry
+      assert.equal(s.details.plan.error, undefined)
+      assert.equal(s.details.plan.data.planId, 'plan')
+    }
+    h.stop()
+  })
diff --git a/web-admin/src/views/pl/plan-quota/index.vue b/web-admin/src/views/pl/plan-quota/index.vue
index 9f0adc7e7..51761d6c1 100644
--- a/web-admin/src/views/pl/plan-quota/index.vue
+++ b/web-admin/src/views/pl/plan-quota/index.vue
@@ -78,7 +78,7 @@
                 >
                   <el-alert
                     v-if="details[row.id]?.error"
-                    title="段次用证加载失败"
+                    :title="details[row.id]?.error"
                     type="error"
                     :closable="false"
                     ><el-button @click="loadDetail(row.id)"
@@ -221,7 +221,7 @@
     rows = ref<(Plan & { quotaStatus: string })[]>([])
   const dialog = ref<InstanceType<typeof PlPlanQuotaDialog>>()
   const expandedIds = ref<string[]>([])
-  const details = reactive<Record<string, { loading: boolean; data?: PlanQuota; error?: boolean }>>(
+  const details = reactive<Record<string, { loading: boolean; data?: PlanQuota; error?: string }>>(
     {}
   )
   function clearDetails() {
@@ -230,15 +230,21 @@
   }
   async function loadDetail(id: string) {
     const current = epoch
-    const state = reactive<{ loading: boolean; data?: PlanQuota; error?: boolean }>({
+    const state = reactive<{ loading: boolean; data?: PlanQuota; error?: string }>({
       loading: true
     })
     details[id] = state
     try {
       const value = await planQuotaApi.get(id)
       if (current === epoch && details[id] === state) state.data = value
-    } catch {
-      if (current === epoch && details[id] === state) state.error = true
+    } catch (error) {
+      if (current === epoch && details[id] === state) {
+        const status = (error as { response?: { status?: number } })?.response?.status
+        state.error =
+          status === 403 || status === 404
+            ? '计划或证件不可读取，无法展示完整用证详情'
+            : '段次用证加载失败，请重试'
+      }
     } finally {
       if (current === epoch && details[id] === state) state.loading = false
     }