diff --git a/web/admin-spa/src/components/accounts/AccountForm.vue b/web/admin-spa/src/components/accounts/AccountForm.vue
index eb252e55..10d469aa 100644
--- a/web/admin-spa/src/components/accounts/AccountForm.vue
+++ b/web/admin-spa/src/components/accounts/AccountForm.vue
@@ -870,7 +870,19 @@ const form = ref({
   apiUrl: props.account?.apiUrl || '',
   apiKey: props.account?.apiKey || '',
   priority: props.account?.priority || 50,
-  supportedModels: props.account?.supportedModels?.join('\n') || '',
+  supportedModels: (() => {
+    const models = props.account?.supportedModels;
+    if (!models) return '';
+    // 处理对象格式（Claude Console 的新格式）
+    if (typeof models === 'object' && !Array.isArray(models)) {
+      return Object.keys(models).join('\n');
+    }
+    // 处理数组格式（向后兼容）
+    if (Array.isArray(models)) {
+      return models.join('\n');
+    }
+    return '';
+  })(),
   userAgent: props.account?.userAgent || '',
   rateLimitDuration: props.account?.rateLimitDuration || 60
 })
@@ -1362,7 +1374,19 @@ watch(() => props.account, (newAccount) => {
       apiUrl: newAccount.apiUrl || '',
       apiKey: '',  // 编辑模式不显示现有的 API Key
       priority: newAccount.priority || 50,
-      supportedModels: newAccount.supportedModels?.join('\n') || '',
+      supportedModels: (() => {
+        const models = newAccount.supportedModels;
+        if (!models) return '';
+        // 处理对象格式（Claude Console 的新格式）
+        if (typeof models === 'object' && !Array.isArray(models)) {
+          return Object.keys(models).join('\n');
+        }
+        // 处理数组格式（向后兼容）
+        if (Array.isArray(models)) {
+          return models.join('\n');
+        }
+        return '';
+      })(),
       userAgent: newAccount.userAgent || '',
       rateLimitDuration: newAccount.rateLimitDuration || 60
     }
diff --git a/web/admin-spa/src/components/apikeys/CreateApiKeyModal.vue b/web/admin-spa/src/components/apikeys/CreateApiKeyModal.vue
index 4044b689..2020f74a 100644
--- a/web/admin-spa/src/components/apikeys/CreateApiKeyModal.vue
+++ b/web/admin-spa/src/components/apikeys/CreateApiKeyModal.vue
@@ -425,87 +425,27 @@
             <div class="grid grid-cols-1 gap-3">
               <div>
                 <label class="block text-sm font-medium text-gray-600 mb-1">Claude 专属账号</label>
-                <select 
-                  v-model="form.claudeAccountId" 
-                  class="form-input w-full"
+                <AccountSelector
+                  v-model="form.claudeAccountId"
+                  platform="claude"
+                  :accounts="localAccounts.claude"
+                  :groups="localAccounts.claudeGroups"
                   :disabled="form.permissions === 'gemini'"
-                >
-                  <option value="">
-                    使用共享账号池
-                  </option>
-                  <optgroup
-                    v-if="localAccounts.claudeGroups && localAccounts.claudeGroups.length > 0"
-                    label="调度分组"
-                  >
-                    <option 
-                      v-for="group in localAccounts.claudeGroups" 
-                      :key="`group:${group.id}`" 
-                      :value="`group:${group.id}`"
-                    >
-                      {{ group.name }} ({{ group.memberCount || 0 }} 个成员)
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-oauth').length > 0"
-                    label="Claude OAuth 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-oauth')" 
-                      :key="account.id" 
-                      :value="account.id"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-console').length > 0"
-                    label="Claude Console 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-console')" 
-                      :key="account.id" 
-                      :value="`console:${account.id}`"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                </select>
+                  placeholder="请选择Claude账号"
+                  default-option-text="使用共享账号池"
+                />
               </div>
               <div>
                 <label class="block text-sm font-medium text-gray-600 mb-1">Gemini 专属账号</label>
-                <select 
-                  v-model="form.geminiAccountId" 
-                  class="form-input w-full"
+                <AccountSelector
+                  v-model="form.geminiAccountId"
+                  platform="gemini"
+                  :accounts="localAccounts.gemini"
+                  :groups="localAccounts.geminiGroups"
                   :disabled="form.permissions === 'claude'"
-                >
-                  <option value="">
-                    使用共享账号池
-                  </option>
-                  <optgroup
-                    v-if="localAccounts.geminiGroups && localAccounts.geminiGroups.length > 0"
-                    label="调度分组"
-                  >
-                    <option 
-                      v-for="group in localAccounts.geminiGroups" 
-                      :key="`group:${group.id}`" 
-                      :value="`group:${group.id}`"
-                    >
-                      {{ group.name }} ({{ group.memberCount || 0 }} 个成员)
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.gemini.filter(a => a.accountType === 'dedicated').length > 0"
-                    label="Gemini 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.gemini.filter(a => a.accountType === 'dedicated')" 
-                      :key="account.id" 
-                      :value="account.id"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                </select>
+                  placeholder="请选择Gemini账号"
+                  default-option-text="使用共享账号池"
+                />
               </div>
             </div>
             <p class="text-xs text-gray-500 mt-2">
@@ -665,6 +605,7 @@ import { showToast } from '@/utils/toast'
 import { useClientsStore } from '@/stores/clients'
 import { useApiKeysStore } from '@/stores/apiKeys'
 import { apiClient } from '@/config/api'
+import AccountSelector from '@/components/common/AccountSelector.vue'
 
 const props = defineProps({
   accounts: {
diff --git a/web/admin-spa/src/components/apikeys/EditApiKeyModal.vue b/web/admin-spa/src/components/apikeys/EditApiKeyModal.vue
index 87a42f6a..9b23dbb6 100644
--- a/web/admin-spa/src/components/apikeys/EditApiKeyModal.vue
+++ b/web/admin-spa/src/components/apikeys/EditApiKeyModal.vue
@@ -294,87 +294,27 @@
             <div class="grid grid-cols-1 gap-3">
               <div>
                 <label class="block text-sm font-medium text-gray-600 mb-1">Claude 专属账号</label>
-                <select 
-                  v-model="form.claudeAccountId" 
-                  class="form-input w-full"
+                <AccountSelector
+                  v-model="form.claudeAccountId"
+                  platform="claude"
+                  :accounts="localAccounts.claude"
+                  :groups="localAccounts.claudeGroups"
                   :disabled="form.permissions === 'gemini'"
-                >
-                  <option value="">
-                    使用共享账号池
-                  </option>
-                  <optgroup
-                    v-if="localAccounts.claudeGroups && localAccounts.claudeGroups.length > 0"
-                    label="调度分组"
-                  >
-                    <option 
-                      v-for="group in localAccounts.claudeGroups" 
-                      :key="`group:${group.id}`" 
-                      :value="`group:${group.id}`"
-                    >
-                      {{ group.name }} ({{ group.memberCount || 0 }} 个成员)
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-oauth').length > 0"
-                    label="Claude OAuth 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-oauth')" 
-                      :key="account.id" 
-                      :value="account.id"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-console').length > 0"
-                    label="Claude Console 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.claude.filter(a => a.accountType === 'dedicated' && a.platform === 'claude-console')" 
-                      :key="account.id" 
-                      :value="`console:${account.id}`"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                </select>
+                  placeholder="请选择Claude账号"
+                  default-option-text="使用共享账号池"
+                />
               </div>
               <div>
                 <label class="block text-sm font-medium text-gray-600 mb-1">Gemini 专属账号</label>
-                <select 
-                  v-model="form.geminiAccountId" 
-                  class="form-input w-full"
+                <AccountSelector
+                  v-model="form.geminiAccountId"
+                  platform="gemini"
+                  :accounts="localAccounts.gemini"
+                  :groups="localAccounts.geminiGroups"
                   :disabled="form.permissions === 'claude'"
-                >
-                  <option value="">
-                    使用共享账号池
-                  </option>
-                  <optgroup
-                    v-if="localAccounts.geminiGroups && localAccounts.geminiGroups.length > 0"
-                    label="调度分组"
-                  >
-                    <option 
-                      v-for="group in localAccounts.geminiGroups" 
-                      :key="`group:${group.id}`" 
-                      :value="`group:${group.id}`"
-                    >
-                      {{ group.name }} ({{ group.memberCount || 0 }} 个成员)
-                    </option>
-                  </optgroup>
-                  <optgroup
-                    v-if="localAccounts.gemini.filter(a => a.accountType === 'dedicated').length > 0"
-                    label="Gemini 专属账号"
-                  >
-                    <option 
-                      v-for="account in localAccounts.gemini.filter(a => a.accountType === 'dedicated')" 
-                      :key="account.id" 
-                      :value="account.id"
-                    >
-                      {{ account.name }} ({{ account.status === 'active' ? '正常' : '异常' }})
-                    </option>
-                  </optgroup>
-                </select>
+                  placeholder="请选择Gemini账号"
+                  default-option-text="使用共享账号池"
+                />
               </div>
             </div>
             <p class="text-xs text-gray-500 mt-2">
@@ -538,6 +478,7 @@ import { useAuthStore } from '@/stores/auth'
 import { useClientsStore } from '@/stores/clients'
 import { useApiKeysStore } from '@/stores/apiKeys'
 import { apiClient } from '@/config/api'
+import AccountSelector from '@/components/common/AccountSelector.vue'
 
 const props = defineProps({
   apiKey: {
@@ -638,11 +579,32 @@ const updateApiKey = async () => {
       concurrencyLimit: form.concurrencyLimit !== '' && form.concurrencyLimit !== null ? parseInt(form.concurrencyLimit) : 0,
       dailyCostLimit: form.dailyCostLimit !== '' && form.dailyCostLimit !== null ? parseFloat(form.dailyCostLimit) : 0,
       permissions: form.permissions,
-      claudeAccountId: form.claudeAccountId || null,
-      geminiAccountId: form.geminiAccountId || null,
       tags: form.tags
     }
     
+    // 处理Claude账户绑定（区分OAuth和Console）
+    if (form.claudeAccountId) {
+      if (form.claudeAccountId.startsWith('console:')) {
+        // Claude Console账户
+        data.claudeConsoleAccountId = form.claudeAccountId.substring(8);
+      } else if (!form.claudeAccountId.startsWith('group:')) {
+        // Claude OAuth账户（非分组）
+        data.claudeAccountId = form.claudeAccountId;
+      } else {
+        // 分组
+        data.claudeAccountId = form.claudeAccountId;
+      }
+    } else {
+      data.claudeAccountId = null;
+    }
+    
+    // Gemini账户绑定
+    if (form.geminiAccountId) {
+      data.geminiAccountId = form.geminiAccountId;
+    } else {
+      data.geminiAccountId = null;
+    }
+    
     // 模型限制 - 始终提交这些字段
     data.enableModelRestriction = form.enableModelRestriction
     data.restrictedModels = form.restrictedModels
@@ -747,7 +709,12 @@ onMounted(async () => {
   form.concurrencyLimit = props.apiKey.concurrencyLimit || ''
   form.dailyCostLimit = props.apiKey.dailyCostLimit || ''
   form.permissions = props.apiKey.permissions || 'all'
-  form.claudeAccountId = props.apiKey.claudeAccountId || ''
+  // 处理 Claude 账号（区分 OAuth 和 Console）
+  if (props.apiKey.claudeConsoleAccountId) {
+    form.claudeAccountId = `console:${props.apiKey.claudeConsoleAccountId}`
+  } else {
+    form.claudeAccountId = props.apiKey.claudeAccountId || ''
+  }
   form.geminiAccountId = props.apiKey.geminiAccountId || ''
   form.restrictedModels = props.apiKey.restrictedModels || []
   form.allowedClients = props.apiKey.allowedClients || []
diff --git a/web/admin-spa/src/components/common/AccountSelector.vue b/web/admin-spa/src/components/common/AccountSelector.vue
new file mode 100644
index 00000000..da8ab6e8
--- /dev/null
+++ b/web/admin-spa/src/components/common/AccountSelector.vue
@@ -0,0 +1,468 @@
+<template>
+  <div ref="triggerRef" class="relative">
+    <!-- 选择器主体 -->
+    <div
+      class="form-input w-full cursor-pointer flex items-center justify-between"
+      :class="{ 'opacity-50': disabled }"
+      @click="!disabled && toggleDropdown()"
+    >
+      <span :class="modelValue ? 'text-gray-900' : 'text-gray-500'">{{ selectedLabel }}</span>
+      <i class="fas fa-chevron-down text-gray-400 transition-transform duration-200" :class="{ 'rotate-180': showDropdown }" />
+    </div>
+
+    <!-- 下拉菜单 -->
+    <Teleport to="body">
+      <Transition
+        enter-active-class="transition ease-out duration-100"
+        enter-from-class="transform opacity-0 scale-95"
+        enter-to-class="transform opacity-100 scale-100"
+        leave-active-class="transition ease-in duration-75"
+        leave-from-class="transform opacity-100 scale-100"
+        leave-to-class="transform opacity-0 scale-95"
+      >
+        <div
+          v-if="showDropdown"
+          ref="dropdownRef"
+          class="absolute z-50 bg-white rounded-lg shadow-lg border border-gray-200 flex flex-col"
+          :style="dropdownStyle"
+        >
+          <!-- 搜索框 -->
+          <div class="p-3 border-b border-gray-200 flex-shrink-0">
+            <div class="relative">
+              <input
+                ref="searchInput"
+                v-model="searchQuery"
+                type="text"
+                placeholder="搜索账号名称..."
+                class="form-input w-full text-sm"
+                style="padding-left: 40px; padding-right: 36px;"
+                @input="handleSearch"
+              >
+              <i class="fas fa-search absolute left-3 top-1/2 -translate-y-1/2 text-gray-400 text-sm pointer-events-none" />
+              <button
+                v-if="searchQuery"
+                type="button"
+                class="absolute right-3 top-1/2 -translate-y-1/2 text-gray-400 hover:text-gray-600"
+                @click="clearSearch"
+              >
+                <i class="fas fa-times text-sm" />
+              </button>
+            </div>
+          </div>
+
+          <!-- 选项列表 -->
+          <div class="flex-1 overflow-y-auto custom-scrollbar">
+            <!-- 默认选项 -->
+            <div
+              class="px-4 py-2 cursor-pointer hover:bg-gray-50 transition-colors"
+              :class="{ 'bg-blue-50': !modelValue }"
+              @click="selectAccount(null)"
+            >
+              <span class="text-gray-700">{{ defaultOptionText }}</span>
+            </div>
+
+            <!-- 分组选项 -->
+            <div v-if="filteredGroups.length > 0">
+              <div class="px-4 py-2 text-xs font-semibold text-gray-500 bg-gray-50">
+                调度分组
+              </div>
+              <div
+                v-for="group in filteredGroups"
+                :key="`group:${group.id}`"
+                class="px-4 py-2 cursor-pointer hover:bg-gray-50 transition-colors"
+                :class="{ 'bg-blue-50': modelValue === `group:${group.id}` }"
+                @click="selectAccount(`group:${group.id}`)"
+              >
+                <div class="flex items-center justify-between">
+                  <span class="text-gray-700">{{ group.name }}</span>
+                  <span class="text-xs text-gray-500">{{ group.memberCount || 0 }} 个成员</span>
+                </div>
+              </div>
+            </div>
+
+            <!-- OAuth 账号 -->
+            <div v-if="filteredOAuthAccounts.length > 0">
+              <div class="px-4 py-2 text-xs font-semibold text-gray-500 bg-gray-50">
+                {{ platform === 'claude' ? 'Claude OAuth 专属账号' : 'OAuth 专属账号' }}
+              </div>
+              <div
+                v-for="account in filteredOAuthAccounts"
+                :key="account.id"
+                class="px-4 py-2 cursor-pointer hover:bg-gray-50 transition-colors"
+                :class="{ 'bg-blue-50': modelValue === account.id }"
+                @click="selectAccount(account.id)"
+              >
+                <div class="flex items-center justify-between">
+                  <div>
+                    <span class="text-gray-700">{{ account.name }}</span>
+                    <span
+                      class="ml-2 text-xs px-2 py-0.5 rounded-full"
+                      :class="account.status === 'active' ? 'bg-green-100 text-green-700' : 'bg-red-100 text-red-700'"
+                    >
+                      {{ account.status === 'active' ? '正常' : '异常' }}
+                    </span>
+                  </div>
+                  <span class="text-xs text-gray-400">
+                    {{ formatDate(account.createdAt) }}
+                  </span>
+                </div>
+              </div>
+            </div>
+
+            <!-- Console 账号（仅 Claude） -->
+            <div v-if="platform === 'claude' && filteredConsoleAccounts.length > 0">
+              <div class="px-4 py-2 text-xs font-semibold text-gray-500 bg-gray-50">
+                Claude Console 专属账号
+              </div>
+              <div
+                v-for="account in filteredConsoleAccounts"
+                :key="account.id"
+                class="px-4 py-2 cursor-pointer hover:bg-gray-50 transition-colors"
+                :class="{ 'bg-blue-50': modelValue === `console:${account.id}` }"
+                @click="selectAccount(`console:${account.id}`)"
+              >
+                <div class="flex items-center justify-between">
+                  <div>
+                    <span class="text-gray-700">{{ account.name }}</span>
+                    <span
+                      class="ml-2 text-xs px-2 py-0.5 rounded-full"
+                      :class="account.status === 'active' ? 'bg-green-100 text-green-700' : 'bg-red-100 text-red-700'"
+                    >
+                      {{ account.status === 'active' ? '正常' : '异常' }}
+                    </span>
+                  </div>
+                  <span class="text-xs text-gray-400">
+                    {{ formatDate(account.createdAt) }}
+                  </span>
+                </div>
+              </div>
+            </div>
+
+            <!-- 无搜索结果 -->
+            <div v-if="searchQuery && !hasResults" class="px-4 py-8 text-center text-gray-500">
+              <i class="fas fa-search text-2xl mb-2" />
+              <p class="text-sm">没有找到匹配的账号</p>
+            </div>
+          </div>
+        </div>
+      </Transition>
+    </Teleport>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, watch, nextTick, onMounted, onUnmounted } from 'vue'
+
+const props = defineProps({
+  modelValue: {
+    type: String,
+    default: ''
+  },
+  platform: {
+    type: String,
+    required: true,
+    validator: (value) => ['claude', 'gemini'].includes(value)
+  },
+  accounts: {
+    type: Array,
+    default: () => []
+  },
+  groups: {
+    type: Array,
+    default: () => []
+  },
+  disabled: {
+    type: Boolean,
+    default: false
+  },
+  placeholder: {
+    type: String,
+    default: '请选择账号'
+  },
+  defaultOptionText: {
+    type: String,
+    default: '使用共享账号池'
+  }
+})
+
+const emit = defineEmits(['update:modelValue'])
+
+const showDropdown = ref(false)
+const searchQuery = ref('')
+const searchInput = ref(null)
+const dropdownRef = ref(null)
+const dropdownStyle = ref({})
+const triggerRef = ref(null)
+const lastDirection = ref('') // 记住上次的显示方向
+
+// 获取选中的标签
+const selectedLabel = computed(() => {
+  // 如果没有选中值，显示默认选项文本
+  if (!props.modelValue) return props.defaultOptionText
+  
+  // 分组
+  if (props.modelValue.startsWith('group:')) {
+    const groupId = props.modelValue.substring(6)
+    const group = props.groups.find(g => g.id === groupId)
+    return group ? `${group.name} (${group.memberCount || 0} 个成员)` : ''
+  }
+  
+  // Console 账号
+  if (props.modelValue.startsWith('console:')) {
+    const accountId = props.modelValue.substring(8)
+    const account = props.accounts.find(a => a.id === accountId && a.platform === 'claude-console')
+    return account ? `${account.name} (${account.status === 'active' ? '正常' : '异常'})` : ''
+  }
+  
+  // OAuth 账号
+  const account = props.accounts.find(a => a.id === props.modelValue)
+  return account ? `${account.name} (${account.status === 'active' ? '正常' : '异常'})` : ''
+})
+
+// 按创建时间倒序排序账号
+const sortedAccounts = computed(() => {
+  return [...props.accounts].sort((a, b) => {
+    const dateA = new Date(a.createdAt || 0)
+    const dateB = new Date(b.createdAt || 0)
+    return dateB - dateA // 倒序排序
+  })
+})
+
+// 过滤的分组
+const filteredGroups = computed(() => {
+  if (!searchQuery.value) return props.groups
+  const query = searchQuery.value.toLowerCase()
+  return props.groups.filter(group => 
+    group.name.toLowerCase().includes(query)
+  )
+})
+
+// 过滤的 OAuth 账号
+const filteredOAuthAccounts = computed(() => {
+  let accounts = sortedAccounts.value.filter(a => 
+    a.accountType === 'dedicated' && 
+    (props.platform === 'claude' ? a.platform === 'claude-oauth' : a.platform !== 'claude-console')
+  )
+  
+  if (searchQuery.value) {
+    const query = searchQuery.value.toLowerCase()
+    accounts = accounts.filter(account => 
+      account.name.toLowerCase().includes(query)
+    )
+  }
+  
+  return accounts
+})
+
+// 过滤的 Console 账号
+const filteredConsoleAccounts = computed(() => {
+  if (props.platform !== 'claude') return []
+  
+  let accounts = sortedAccounts.value.filter(a => 
+    a.accountType === 'dedicated' && a.platform === 'claude-console'
+  )
+  
+  if (searchQuery.value) {
+    const query = searchQuery.value.toLowerCase()
+    accounts = accounts.filter(account => 
+      account.name.toLowerCase().includes(query)
+    )
+  }
+  
+  return accounts
+})
+
+// 是否有搜索结果
+const hasResults = computed(() => {
+  return filteredGroups.value.length > 0 || 
+         filteredOAuthAccounts.value.length > 0 || 
+         filteredConsoleAccounts.value.length > 0
+})
+
+// 格式化日期
+const formatDate = (dateString) => {
+  if (!dateString) return ''
+  const date = new Date(dateString)
+  const now = new Date()
+  const diffInHours = (now - date) / (1000 * 60 * 60)
+  
+  if (diffInHours < 24) {
+    return '今天创建'
+  } else if (diffInHours < 48) {
+    return '昨天创建'
+  } else if (diffInHours < 168) { // 7天内
+    return `${Math.floor(diffInHours / 24)} 天前`
+  } else {
+    return date.toLocaleDateString('zh-CN', { month: '2-digit', day: '2-digit' })
+  }
+}
+
+// 更新下拉菜单位置
+const updateDropdownPosition = () => {
+  if (!showDropdown.value || !dropdownRef.value || !triggerRef.value) return
+  
+  const trigger = triggerRef.value
+  if (!trigger) return
+  
+  const rect = trigger.getBoundingClientRect()
+  const windowHeight = window.innerHeight
+  const windowWidth = window.innerWidth
+  const spaceBelow = windowHeight - rect.bottom
+  const spaceAbove = rect.top
+  const margin = 8 // 边距
+  
+  // 获取下拉框的高度
+  const dropdownHeight = dropdownRef.value.offsetHeight
+  
+  // 计算最大可用高度
+  const maxHeightBelow = spaceBelow - margin
+  const maxHeightAbove = spaceAbove - margin
+  
+  // 决定显示方向和最大高度
+  let showAbove = false
+  let maxHeight = maxHeightBelow
+  
+  // 优先使用上次的方向，除非空间不足
+  if (lastDirection.value === 'above' && maxHeightAbove >= 150) {
+    showAbove = true
+    maxHeight = maxHeightAbove
+  } else if (lastDirection.value === 'below' && maxHeightBelow >= 150) {
+    showAbove = false
+    maxHeight = maxHeightBelow
+  } else {
+    // 如果没有历史方向或空间不足，选择空间更大的方向
+    if (maxHeightAbove > maxHeightBelow && maxHeightBelow < 200) {
+      showAbove = true
+      maxHeight = maxHeightAbove
+    }
+  }
+  
+  // 记住这次的方向
+  lastDirection.value = showAbove ? 'above' : 'below'
+  
+  // 确保下拉框不超出视窗左右边界
+  let left = rect.left
+  const dropdownWidth = rect.width
+  if (left + dropdownWidth > windowWidth - margin) {
+    left = windowWidth - dropdownWidth - margin
+  }
+  if (left < margin) {
+    left = margin
+  }
+  
+  dropdownStyle.value = {
+    position: 'fixed',
+    left: `${left}px`,
+    width: `${rect.width}px`,
+    maxHeight: `${Math.min(maxHeight, 400)}px`, // 限制最大高度为400px
+    ...(showAbove
+      ? { bottom: `${windowHeight - rect.top}px` }
+      : { top: `${rect.bottom}px` }
+    )
+  }
+}
+
+// 切换下拉菜单
+const toggleDropdown = () => {
+  if (!showDropdown.value && triggerRef.value) {
+    // 在显示前就设置初始样式，避免闪烁
+    const rect = triggerRef.value.getBoundingClientRect()
+    const windowHeight = window.innerHeight
+    const spaceBelow = windowHeight - rect.bottom
+    const margin = 8
+    
+    // 预先设置一个合理的初始位置
+    dropdownStyle.value = {
+      position: 'fixed',
+      left: `${rect.left}px`,
+      width: `${rect.width}px`,
+      maxHeight: `${Math.min(spaceBelow - margin, 400)}px`,
+      top: `${rect.bottom}px`
+    }
+  }
+  showDropdown.value = !showDropdown.value
+  if (showDropdown.value) {
+    nextTick(() => {
+      updateDropdownPosition()
+      searchInput.value?.focus()
+    })
+  }
+}
+
+// 选择账号
+const selectAccount = (value) => {
+  emit('update:modelValue', value || '')
+  showDropdown.value = false
+  searchQuery.value = ''
+}
+
+// 处理搜索
+const handleSearch = () => {
+  // 搜索时自动触发
+}
+
+// 清除搜索
+const clearSearch = () => {
+  searchQuery.value = ''
+  searchInput.value?.focus()
+}
+
+// 点击外部关闭
+const handleClickOutside = (event) => {
+  if (!triggerRef.value?.contains(event.target) && !dropdownRef.value?.contains(event.target)) {
+    showDropdown.value = false
+  }
+}
+
+// 监听滚动更新位置
+const handleScroll = () => {
+  if (showDropdown.value) {
+    updateDropdownPosition()
+  }
+}
+
+onMounted(() => {
+  document.addEventListener('click', handleClickOutside)
+  window.addEventListener('scroll', handleScroll, true)
+  window.addEventListener('resize', updateDropdownPosition)
+})
+
+onUnmounted(() => {
+  document.removeEventListener('click', handleClickOutside)
+  window.removeEventListener('scroll', handleScroll, true)
+  window.removeEventListener('resize', updateDropdownPosition)
+})
+
+// 监听下拉菜单状态变化
+watch(showDropdown, (newVal) => {
+  if (!newVal) {
+    searchQuery.value = ''
+    // 关闭时重置方向，下次打开重新计算
+    lastDirection.value = ''
+  }
+})
+</script>
+
+<style scoped>
+.custom-scrollbar {
+  scrollbar-width: thin;
+  scrollbar-color: #cbd5e0 #f7fafc;
+}
+
+.custom-scrollbar::-webkit-scrollbar {
+  width: 6px;
+}
+
+.custom-scrollbar::-webkit-scrollbar-track {
+  background: #f7fafc;
+}
+
+.custom-scrollbar::-webkit-scrollbar-thumb {
+  background-color: #cbd5e0;
+  border-radius: 3px;
+}
+
+.custom-scrollbar::-webkit-scrollbar-thumb:hover {
+  background-color: #a0aec0;
+}
+</style>
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