diff --git a/src/utils/jmap.ts b/src/utils/jmap.ts
index d8e8a1a..700c5b8 100644
--- a/src/utils/jmap.ts
+++ b/src/utils/jmap.ts
@@ -91,11 +91,13 @@ export class JmapClient {
     return payload.list || []
   }
 
-  /** 查询指定邮箱内的邮件 id（默认收件箱，按接收时间倒序） */
-  async queryEmailIds(mailboxId: string, limit = 50): Promise<string[]> {
+  /** 查询邮箱内邮件 id（mailboxId 为空时查全部；按接收时间倒序） */
+  async queryEmailIds(mailboxId: string | null = null, limit = 50): Promise<string[]> {
+    const filter: Record<string, unknown> = {}
+    if (mailboxId) filter.inMailbox = mailboxId
     const payload = await this.call<{ ids: string[] }>('Email/query', {
       accountId: this.accountId,
-      filter: { inMailbox: mailboxId },
+      filter,
       sort: [{ property: 'receivedAt', isAscending: false }],
       limit,
     })
@@ -132,6 +134,32 @@ export class JmapClient {
     })
   }
 
+  /** 批量标记已读/未读 */
+  async setSeenBatch(emailIds: string[], seen: boolean): Promise<void> {
+    if (!emailIds.length) return
+    const update: Record<string, unknown> = {}
+    for (const id of emailIds) {
+      update[id] = { keywords: seen ? { $seen: true } : { $seen: false } }
+    }
+    await this.call<unknown>('Email/set', { accountId: this.accountId, update })
+  }
+
+  /** 批量删除：传入 fromMailboxId 且有垃圾箱时移入垃圾箱；否则直接销毁 */
+  async deleteEmailBatch(emailIds: string[], fromMailboxId?: string): Promise<void> {
+    if (!emailIds.length) return
+    const mailboxes = await this.getMailboxes()
+    const trash = mailboxes.find((m) => m.role === 'trash')
+    if (!fromMailboxId || !trash) {
+      await this.call<unknown>('Email/set', { accountId: this.accountId, destroy: emailIds })
+      return
+    }
+    const update: Record<string, unknown> = {}
+    for (const id of emailIds) {
+      update[id] = { mailboxIds: { [trash.id]: true, [fromMailboxId]: false } }
+    }
+    await this.call<unknown>('Email/set', { accountId: this.accountId, update })
+  }
+
   /** 获取发信身份（Identity） */
   private async getIdentityId(): Promise<string> {
     const payload = await this.call<{ list: Array<{ id: string }> }>('Identity/get', { accountId: this.accountId, ids: null })
@@ -148,6 +176,8 @@ export class JmapClient {
     subject: string
     textBody?: string
     htmlBody?: string
+    inReplyTo?: string[]
+    references?: string[]
   }): Promise<void> {
     const mailboxes = await this.getMailboxes()
     const drafts = mailboxes.find((m) => m.role === 'drafts') || mailboxes[0]
@@ -160,6 +190,9 @@ export class JmapClient {
       to: opts.to.map((t) => ({ name: t.name || '', email: t.email })),
       subject: opts.subject,
     }
+    // 回复/转发时携带引用头，形成会话线程
+    if (opts.inReplyTo?.length) emailData.inReplyTo = opts.inReplyTo
+    if (opts.references?.length) emailData.references = opts.references
     // 正文必须用标准 JMAP bodyValues + partId 引用方式：
     // Stalwart v0.11 不允许在 textBody/htmlBody 数组里内联 value（报 invalidProperties "Cannot set property."）
     if (opts.htmlBody) {
diff --git a/src/views/mail/Mailbox.vue b/src/views/mail/Mailbox.vue
index fbde942..da3c981 100644
--- a/src/views/mail/Mailbox.vue
+++ b/src/views/mail/Mailbox.vue
@@ -1,20 +1,25 @@
 <script setup lang="ts">
 /**
- * 我的邮箱（Stalwart）
+ * 我的邮箱（Stalwart）—— 163/企业邮箱风格
  *
  * 流程：
  * - 未申请 → 申请表单（邮箱名 + 密码 + 确认密码）
  * - 已申请 → 输入邮箱密码登录 JMAP（凭据仅存内存）→ 收发邮件
- * - 支持：收件箱/全部/已发送查看、邮件详情（标记已读）、删除、写信发信、修改邮箱密码
+ * - 三栏布局：左侧文件夹树（未读数徽标）+ 中间邮件列表（多选/批量已读/删除）
+ *             + 右侧阅读窗格（回复/转发/删除）
+ * - 支持：收件箱/全部/草稿/已发送/垃圾箱查看、标记已读、删除（移入垃圾箱）、
+ *         写信/回复/转发、修改邮箱密码
  *
  * 接口：
  * - GET  /API/Mail/MyMailbox           → { Mailbox, Session }
  * - POST /API/Mail/Apply               → 申请（MailboxName/Password/QuotaMB）
  * - POST /API/Mail/ChangePassword      → 改密（NewPassword）
- * - 收发走浏览器直连 Stalwart JMAP（/jmap/），Basic 认证
+ * - POST /API/Mail/Login               → 校验密码并签发会话 token（密码仅传一次）
+ * - POST /API/Mail/Jmap                → JMAP 收发代理（携带 token，不传明文密码）
  */
 import { ref, computed, onMounted, nextTick } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
+import { Message, EditPen, Promotion, Delete, Folder, Warning, Refresh, RefreshLeft } from '@element-plus/icons-vue'
 import { mailApi, type MailboxInfo, type MailSessionConfig } from '@/api/mail'
 import { JmapClient, type JmapMailbox, type JmapEmail } from '@/utils/jmap'
 
@@ -35,17 +40,20 @@ const loginForm = ref({ Password: '' })
 const connecting = ref(false)
 
 // 邮件数据
+const ALL_ID = '__all__'
 const mailboxes = ref<JmapMailbox[]>([])
 const currentMailboxId = ref('')
 const emails = ref<JmapEmail[]>([])
 const emailsLoading = ref(false)
 const totalEmails = ref(0)
+const selectedIds = ref<string[]>([])
 
-// 详情 / 写信
-const detailVisible = ref(false)
+// 阅读 / 写信
 const currentEmail = ref<JmapEmail | null>(null)
 const composeVisible = ref(false)
 const composeForm = ref({ To: '', Subject: '', TextBody: '' })
+const composeInReplyTo = ref<string | undefined>()
+const composeReferences = ref<string[]>([])
 const sending = ref(false)
 
 // 改密
@@ -121,15 +129,59 @@ async function submitLogin(): Promise<void> {
   }
 }
 
+// === 左侧文件夹 ===
+
+const ROLE_LABELS: Record<string, string> = {
+  inbox: '收件箱',
+  drafts: '草稿箱',
+  sent: '已发送',
+  trash: '垃圾箱',
+  junk: '垃圾邮件',
+  archive: '存档',
+  outbox: '发件箱',
+}
+
+const FOLDER_ORDER = ['inbox', 'drafts', 'sent', 'trash', 'junk', 'archive']
+
+function folderIcon(f: JmapMailbox) {
+  switch (f.role) {
+    case 'inbox': return Message
+    case 'drafts': return EditPen
+    case 'sent': return Promotion
+    case 'trash': return Delete
+    case 'junk': return Warning
+    default: return Folder
+  }
+}
+
+function folderLabel(f: JmapMailbox): string {
+  if (f.id === ALL_ID) return '全部邮件'
+  if (f.role && ROLE_LABELS[f.role]) return ROLE_LABELS[f.role]
+  return f.name
+}
+
+const displayFolders = computed<JmapMailbox[]>(() => {
+  const all: JmapMailbox = { id: ALL_ID, name: '全部邮件', role: null, totalEmails: totalEmails.value, unreadEmails: 0 }
+  const sorted = [...mailboxes.value].sort((a, b) => {
+    const ia = a.role ? FOLDER_ORDER.indexOf(a.role) : -1
+    const ib = b.role ? FOLDER_ORDER.indexOf(b.role) : -1
+    return (ia === -1 ? 99 : ia) - (ib === -1 ? 99 : ib)
+  })
+  return [all, ...sorted]
+})
+
+const currentMailbox = computed(() => mailboxes.value.find((m) => m.id === currentMailboxId.value) || null)
+const currentFolderName = computed(() => displayFolders.value.find((x) => x.id === currentMailboxId.value)?.name || '')
+
 // === 邮件加载 ===
 
 async function loadMailboxes(): Promise<void> {
   if (!client.value) return
   try {
     mailboxes.value = await client.value.getMailboxes()
+    totalEmails.value = mailboxes.value.reduce((s, m) => s + (m.totalEmails || 0), 0)
     const inbox = mailboxes.value.find((m) => m.role === 'inbox') || mailboxes.value[0]
     currentMailboxId.value = inbox?.id || ''
-    totalEmails.value = inbox?.totalEmails || 0
     await loadEmails()
   } catch (e) {
     ElMessage.error((e as Error).message || '加载邮箱失败')
@@ -137,11 +189,12 @@ async function loadMailboxes(): Promise<void> {
 }
 
 async function loadEmails(): Promise<void> {
-  if (!client.value || !currentMailboxId.value) return
+  if (!client.value) return
   emailsLoading.value = true
   try {
-    const ids = await client.value.queryEmailIds(currentMailboxId.value, 50)
+    const ids = await client.value.queryEmailIds(currentMailboxId.value === ALL_ID ? null : currentMailboxId.value, 50)
     emails.value = ids.length ? await client.value.getEmails(ids) : []
+    selectedIds.value = []
   } catch (e) {
     ElMessage.error((e as Error).message || '加载邮件失败')
   } finally {
@@ -150,51 +203,137 @@ async function loadEmails(): Promise<void> {
 }
 
 async function switchMailbox(id: string): Promise<void> {
+  if (id === currentMailboxId.value) return
   currentMailboxId.value = id
+  currentEmail.value = null
   await loadEmails()
 }
 
-// === 邮件详情 / 操作 ===
+// === 选择 / 标记已读 ===
 
-function formatSender(e: JmapEmail): string {
-  const from = e.from?.[0]
-  if (!from) return '未知发件人'
-  return from.name ? `${from.name} <${from.email}>` : from.email
-}
+const allChecked = computed(() => emails.value.length > 0 && selectedIds.value.length === emails.value.length)
+const someChecked = computed(() => selectedIds.value.length > 0 && selectedIds.value.length < emails.value.length)
 
-async function openDetail(e: JmapEmail): Promise<void> {
-  currentEmail.value = e
-  detailVisible.value = true
-  if (!e.keywords?.$seen) {
-    await client.value?.setSeen(e.id, true)
-    e.keywords = { ...e.keywords, $seen: true }
+function toggleSelect(id: string, v: boolean): void {
+  if (v) {
+    if (!selectedIds.value.includes(id)) selectedIds.value.push(id)
+  } else {
+    selectedIds.value = selectedIds.value.filter((x) => x !== id)
   }
 }
 
-function formatDate(iso: string): string {
-  if (!iso) return ''
-  const d = new Date(iso)
-  return d.toLocaleString('zh-CN', { hour12: false })
+function toggleSelectAll(): void {
+  selectedIds.value = allChecked.value ? [] : emails.value.map((e) => e.id)
 }
 
-async function deleteEmail(e: JmapEmail): Promise<void> {
+async function selectEmail(e: JmapEmail): Promise<void> {
+  currentEmail.value = e
+  if (!e.keywords?.$seen) {
+    e.keywords = { ...e.keywords, $seen: true }
+    void client.value?.setSeen(e.id, true)
+  }
+}
+
+async function markSelected(seen: boolean): Promise<void> {
+  if (!selectedIds.value.length || !client.value) return
   try {
-    await ElMessageBox.confirm('确定删除这封邮件吗？', '删除确认', { type: 'warning' })
+    await client.value.setSeenBatch(selectedIds.value, seen)
+    for (const e of emails.value) {
+      if (selectedIds.value.includes(e.id)) e.keywords = { ...e.keywords, $seen: seen }
+    }
+    selectedIds.value = []
+    ElMessage.success(seen ? '已标记为已读' : '已标记为未读')
+  } catch (e) {
+    ElMessage.error((e as Error).message || '操作失败')
+  }
+}
+
+// === 删除 ===
+
+async function deleteSelected(): Promise<void> {
+  if (!selectedIds.value.length || !client.value) return
+  try {
+    await ElMessageBox.confirm(`确定删除选中的 ${selectedIds.value.length} 封邮件吗？`, '删除确认', { type: 'warning' })
   } catch {
     return
   }
   try {
-    await client.value?.deleteEmail(e.id)
+    const inTrash = currentMailbox.value?.role === 'trash'
+    await client.value.deleteEmailBatch(selectedIds.value, inTrash ? undefined : currentMailboxId.value)
+    const removed = new Set(selectedIds.value)
+    emails.value = emails.value.filter((x) => !removed.has(x.id))
+    if (currentEmail.value && removed.has(currentEmail.value.id)) currentEmail.value = null
+    selectedIds.value = []
+    ElMessage.success('已删除')
+  } catch (e) {
+    ElMessage.error((e as Error).message || '删除失败')
+  }
+}
+
+async function deleteCurrent(): Promise<void> {
+  const e = currentEmail.value
+  if (!e || !client.value) return
+  try {
+    const inTrash = currentMailbox.value?.role === 'trash'
+    await client.value.deleteEmailBatch([e.id], inTrash ? undefined : currentMailboxId.value)
     emails.value = emails.value.filter((x) => x.id !== e.id)
-    if (currentEmail.value?.id === e.id) detailVisible.value = false
+    currentEmail.value = null
     ElMessage.success('已删除')
   } catch (err) {
     ElMessage.error((err as Error).message || '删除失败')
   }
 }
 
+// === 写信 / 回复 / 转发 ===
+
 function openCompose(): void {
   composeForm.value = { To: '', Subject: '', TextBody: '' }
+  composeInReplyTo.value = undefined
+  composeReferences.value = []
+  composeVisible.value = true
+}
+
+function plainBody(e: JmapEmail | null): string {
+  if (!e) return ''
+  const textPart = e.textBody?.find((p) => p.value != null)
+  if (textPart?.value) return textPart.value
+  const htmlPart = e.htmlBody?.find((p) => p.value != null)
+  if (htmlPart?.value) return htmlPart.value.replace(/<[^>]+>/g, '').replace(/\s+/g, ' ')
+  return '(无正文内容)'
+}
+
+function buildQuote(e: JmapEmail): string {
+  return [
+    '',
+    '------ 原始邮件 ------',
+    `发件人: ${formatSender(e)}`,
+    `收件人: ${(e.to || []).map((t) => t.email).join(', ')}`,
+    `发送时间: ${formatDate(e.receivedAt || e.date)}`,
+    `主题: ${e.subject || '(无主题)'}`,
+    '',
+    plainBody(e),
+  ].join('\n')
+}
+
+function replyTo(e: JmapEmail): void {
+  composeForm.value = {
+    To: e.from?.[0]?.email || '',
+    Subject: /^Re:/i.test(e.subject) ? e.subject : `Re: ${e.subject || '(无主题)'}`,
+    TextBody: buildQuote(e),
+  }
+  composeInReplyTo.value = e.messageId?.[0]
+  composeReferences.value = [...(e.inReplyTo || []), ...(e.messageId || [])].filter((x): x is string => !!x)
+  composeVisible.value = true
+}
+
+function forwardTo(e: JmapEmail): void {
+  composeForm.value = {
+    To: '',
+    Subject: /^Fw:/i.test(e.subject) ? e.subject : `Fw: ${e.subject || '(无主题)'}`,
+    TextBody: buildQuote(e),
+  }
+  composeInReplyTo.value = undefined
+  composeReferences.value = []
   composeVisible.value = true
 }
 
@@ -220,9 +359,12 @@ async function submitCompose(): Promise<void> {
       to: toList,
       subject: composeForm.value.Subject.trim() || '(无主题)',
       textBody: composeForm.value.TextBody,
+      inReplyTo: composeInReplyTo.value ? [composeInReplyTo.value] : undefined,
+      references: composeReferences.value.length ? composeReferences.value : undefined,
     })
     ElMessage.success('发送成功')
     composeVisible.value = false
+    await loadEmails()
   } catch (e) {
     ElMessage.error((e as Error).message || '发送失败')
   } finally {
@@ -250,34 +392,82 @@ async function submitChangePassword(): Promise<void> {
     client.value = null
     mailboxes.value = []
     emails.value = []
+    currentEmail.value = null
   } catch {
     // 拦截器已提示
   }
 }
 
-function logoutMail(): void {
+async function logoutMail(): Promise<void> {
+  const c = client.value
   client.value = null
   mailboxes.value = []
   emails.value = []
+  currentEmail.value = null
+  currentMailboxId.value = ''
+  selectedIds.value = []
+  if (c) {
+    try { await mailApi.logout(c.token) } catch { /* 忽略 */ }
+  }
   ElMessage.success('已退出邮箱')
 }
 
+// 打开邮箱登录
+async function openMailbox(): Promise<void> {
+  loginVisible.value = true
+  await nextTick()
+}
+
 // === 渲染辅助 ===
 
-const emailBodyText = computed(() => {
-  const e = currentEmail.value
-  if (!e) return ''
-  const textPart = e.textBody?.find((p) => p.value != null)
-  if (textPart?.value) return textPart.value
-  const htmlPart = e.htmlBody?.find((p) => p.value != null)
-  if (htmlPart?.value) return htmlPart.value.replace(/<[^>]+>/g, '').replace(/\s+/g, ' ')
-  return '(无正文内容)'
-})
+const emailBodyText = computed(() => plainBody(currentEmail.value))
 
-// 打开邮箱详情页时挂载邮箱列表
-async function openMailbox(): Promise<void> {
-  loginVisible.value = true
-  await nextTick()
+function formatSender(e: JmapEmail): string {
+  const from = e.from?.[0]
+  if (!from) return '未知发件人'
+  return from.name ? `${from.name} <${from.email}>` : from.email
+}
+
+function senderLabel(e: JmapEmail): string {
+  const isSent = currentMailbox.value?.role === 'sent' || currentMailbox.value?.role === 'drafts'
+  const who = isSent ? e.to?.[0] : e.from?.[0]
+  if (!who) return '未知'
+  return who.name || who.email
+}
+
+function toList(e: JmapEmail): string {
+  return (e.to || []).map((t) => t.email).join(', ')
+}
+
+function formatDate(iso: string): string {
+  if (!iso) return ''
+  const d = new Date(iso)
+  return d.toLocaleString('zh-CN', { hour12: false })
+}
+
+function smartDate(iso: string): string {
+  if (!iso) return ''
+  const d = new Date(iso)
+  const now = new Date()
+  const startOfToday = new Date(now.getFullYear(), now.getMonth(), now.getDate()).getTime()
+  const t = d.getTime()
+  if (t >= startOfToday) {
+    return d.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit', hour12: false })
+  }
+  const startOfYear = new Date(now.getFullYear(), 0, 1).getTime()
+  if (t >= startOfYear) return `${d.getMonth() + 1}月${d.getDate()}日`
+  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
+}
+
+function rowClass(e: JmapEmail): string {
+  return [
+    !e.keywords?.$seen ? 'row-unread' : '',
+    currentEmail.value?.id === e.id ? 'row-active' : '',
+  ].filter(Boolean).join(' ')
+}
+
+function isSelected(id: string): boolean {
+  return selectedIds.value.includes(id)
 }
 </script>
 
@@ -291,74 +481,119 @@ async function openMailbox(): Promise<void> {
 
       <!-- 已申请：邮箱概览 -->
       <template v-else-if="mailbox && !client">
-        <el-card shadow="never" class="mailbox-card">
-          <template #header>
-            <div class="card-header">
-              <span>我的企业邮箱</span>
-              <el-button text type="primary" @click="changePwdVisible = true">修改密码</el-button>
-            </div>
-          </template>
-          <div class="mailbox-info">
+        <div class="mailbox-card">
+          <div class="mailbox-card-inner">
+            <el-icon :size="48" color="var(--el-color-primary)"><Message /></el-icon>
             <div class="mailbox-address">
-              <el-icon :size="40" color="var(--el-color-primary)"><Message /></el-icon>
-              <div>
-                <div class="address-text">{{ mailbox.MailboxName }}</div>
-                <div class="address-meta">
-                  配额 {{ mailbox.QuotaMB }} MB
-                  <el-tag size="small" :type="mailbox.Status === 1 ? 'success' : 'danger'">
-                    {{ mailbox.Status === 1 ? '启用' : '禁用' }}
-                  </el-tag>
-                </div>
+              <div class="address-text">{{ mailbox.MailboxName }}</div>
+              <div class="address-meta">
+                配额 {{ mailbox.QuotaMB }} MB
+                <el-tag size="small" :type="mailbox.Status === 1 ? 'success' : 'danger'">
+                  {{ mailbox.Status === 1 ? '启用' : '禁用' }}
+                </el-tag>
               </div>
             </div>
-            <el-button type="primary" size="large" @click="openMailbox">登录邮箱</el-button>
+            <div class="mailbox-actions">
+              <el-button @click="changePwdVisible = true">修改密码</el-button>
+              <el-button type="primary" size="large" @click="openMailbox">登录邮箱</el-button>
+            </div>
           </div>
-        </el-card>
+        </div>
       </template>
 
-      <!-- 已登录 JMAP：邮件工作台 -->
+      <!-- 已登录 JMAP：三栏工作台 -->
       <template v-else-if="mailbox && client">
-        <div class="mail-toolbar">
-          <el-select :model-value="currentMailboxId" style="width: 180px" @change="switchMailbox">
-            <el-option v-for="m in mailboxes" :key="m.id" :value="m.id" :label="`${m.name}（${m.totalEmails}）`" />
-          </el-select>
-          <el-button type="primary" :icon="'EditPen'" @click="openCompose">写信</el-button>
-          <el-button :icon="'Refresh'" @click="loadEmails">刷新</el-button>
-          <div class="spacer" />
-          <el-button text type="danger" @click="logoutMail">退出邮箱</el-button>
-        </div>
-
-        <el-table v-loading="emailsLoading" :data="emails" class="email-table" @row-click="(row: any) => openDetail(row as JmapEmail)">
-          <el-table-column width="50">
-            <template #default="{ row }">
-              <span v-if="!row.keywords?.$seen" class="unread-dot" />
-            </template>
-          </el-table-column>
-          <el-table-column prop="from" :width="260">
-            <template #default="{ row }">
-              <span :class="{ 'unread-text': !row.keywords?.$seen }">{{ formatSender(row as JmapEmail) }}</span>
-            </template>
-          </el-table-column>
-          <el-table-column prop="subject" min-width="240">
-            <template #default="{ row }">
-              <span :class="{ 'unread-text': !row.keywords?.$seen }">
-                {{ row.subject || '(无主题)' }}
-              </span>
-              <span v-if="row.preview" class="email-preview"> — {{ row.preview }}</span>
-            </template>
-          </el-table-column>
-          <el-table-column :width="180" align="right">
-            <template #default="{ row }">
-              <div class="email-date">
-                <span>{{ formatDate(row.receivedAt || row.date) }}</span>
-                <el-button text type="danger" size="small" @click.stop="deleteEmail(row as JmapEmail)">删除</el-button>
+        <div class="mail-shell">
+          <!-- 左栏：文件夹 -->
+          <aside class="mail-sidebar">
+            <div class="sidebar-account">
+              <div class="avatar">{{ (myAddress[0] || 'M').toUpperCase() }}</div>
+              <div class="account-name" :title="myAddress">{{ myAddress }}</div>
+            </div>
+            <el-button type="primary" class="compose-btn" :icon="EditPen" @click="openCompose">写信</el-button>
+            <div class="folder-list">
+              <div
+                v-for="f in displayFolders"
+                :key="f.id"
+                class="folder-item"
+                :class="{ active: currentMailboxId === f.id }"
+                @click="switchMailbox(f.id)"
+              >
+                <el-icon class="folder-icon"><component :is="folderIcon(f)" /></el-icon>
+                <span class="folder-name">{{ folderLabel(f) }}</span>
+                <span v-if="f.unreadEmails > 0" class="folder-badge">{{ f.unreadEmails > 99 ? '99+' : f.unreadEmails }}</span>
               </div>
+            </div>
+            <div class="sidebar-footer">
+              <el-button text size="small" @click="changePwdVisible = true">修改密码</el-button>
+              <el-button text size="small" type="danger" @click="logoutMail">退出邮箱</el-button>
+            </div>
+          </aside>
+
+          <!-- 中栏：邮件列表 -->
+          <section class="mail-list-pane">
+            <div class="list-toolbar">
+              <el-checkbox :model-value="allChecked" :indeterminate="someChecked" @change="toggleSelectAll" title="全选" />
+              <span class="toolbar-title">{{ currentFolderName }}</span>
+              <span v-if="selectedIds.length" class="toolbar-count">已选 {{ selectedIds.length }} 封</span>
+              <div class="spacer" />
+              <el-tooltip content="刷新">
+                <el-button text size="small" :icon="Refresh" @click="loadEmails" />
+              </el-tooltip>
+              <el-button text size="small" :disabled="!selectedIds.length" @click="markSelected(true)">已读</el-button>
+              <el-button text size="small" :disabled="!selectedIds.length" @click="markSelected(false)">未读</el-button>
+              <el-button text size="small" type="danger" :disabled="!selectedIds.length" @click="deleteSelected">删除</el-button>
+            </div>
+            <div v-loading="emailsLoading" class="email-list">
+              <div
+                v-for="e in emails"
+                :key="e.id"
+                class="email-row"
+                :class="rowClass(e)"
+                @click="selectEmail(e)"
+              >
+                <div class="row-check" @click.stop>
+                  <el-checkbox :model-value="isSelected(e.id)" @change="toggleSelect(e.id, !isSelected(e.id))" />
+                </div>
+                <div class="row-main">
+                  <div class="row-top">
+                    <span class="row-sender" :class="{ 'txt-unread': !e.keywords?.$seen }">{{ senderLabel(e) }}</span>
+                    <span class="row-date">{{ smartDate(e.receivedAt || e.date) }}</span>
+                  </div>
+                  <div class="row-subject" :class="{ 'txt-unread': !e.keywords?.$seen }">
+                    <span v-if="!e.keywords?.$seen" class="unread-dot" />
+                    <span class="subject-text">{{ e.subject || '(无主题)' }}</span>
+                  </div>
+                  <div v-if="e.preview" class="row-preview">{{ e.preview }}</div>
+                </div>
+              </div>
+              <el-empty v-if="!emailsLoading && !emails.length" description="暂无邮件" :image-size="80" />
+            </div>
+          </section>
+
+          <!-- 右栏：阅读窗格 -->
+          <section class="mail-read-pane">
+            <template v-if="currentEmail">
+              <div class="read-toolbar">
+                <el-button size="small" :icon="RefreshLeft" @click="replyTo(currentEmail)">回复</el-button>
+                <el-button size="small" :icon="Promotion" @click="forwardTo(currentEmail)">转发</el-button>
+                <div class="spacer" />
+                <el-button size="small" text type="danger" :icon="Delete" @click="deleteCurrent">删除</el-button>
+              </div>
+              <div class="read-subject">{{ currentEmail.subject || '(无主题)' }}</div>
+              <div class="read-meta">
+                <div class="read-line"><span class="meta-label">发件人</span><b>{{ formatSender(currentEmail) }}</b></div>
+                <div class="read-line"><span class="meta-label">收件人</span>{{ toList(currentEmail) }}</div>
+                <div class="read-line"><span class="meta-label">时间</span>{{ formatDate(currentEmail.receivedAt || currentEmail.date) }}</div>
+              </div>
+              <el-divider />
+              <div class="read-body">{{ emailBodyText }}</div>
             </template>
-          </el-table-column>
-          <template #empty>
-            <el-empty description="暂无邮件" :image-size="80" />
-          </template>
-        </el-table>
+            <div v-else class="read-empty">
+              <el-empty description="选择一封邮件阅读" :image-size="120" />
+            </div>
+          </section>
+        </div>
       </template>
 
       <el-empty v-else-if="!loading" description="暂无数据" />
@@ -395,25 +630,8 @@ async function openMailbox(): Promise<void> {
       </template>
     </el-dialog>
 
-    <!-- 邮件详情弹窗 -->
-    <el-dialog v-model="detailVisible" :title="currentEmail?.subject || '邮件详情'" width="640px">
-      <template v-if="currentEmail">
-        <div class="email-detail-meta">
-          <div><b>发件人：</b>{{ formatSender(currentEmail) }}</div>
-          <div><b>收件人：</b>{{ (currentEmail.to || []).map((t) => t.email).join(', ') }}</div>
-          <div><b>时间：</b>{{ formatDate(currentEmail.receivedAt || currentEmail.date) }}</div>
-        </div>
-        <el-divider />
-        <pre class="email-body">{{ emailBodyText }}</pre>
-      </template>
-      <template #footer>
-        <el-button @click="detailVisible = false">关闭</el-button>
-        <el-button type="danger" plain @click="deleteEmail(currentEmail!)">删除</el-button>
-      </template>
-    </el-dialog>
-
-    <!-- 写信弹窗 -->
-    <el-dialog v-model="composeVisible" title="写信" width="620px">
+    <!-- 写信弹窗（回复/转发复用） -->
+    <el-dialog v-model="composeVisible" title="写信" width="640px">
       <el-form label-width="70px">
         <el-form-item label="收件人">
           <el-input v-model="composeForm.To" placeholder="多个收件人用逗号或分号分隔" />
@@ -422,7 +640,7 @@ async function openMailbox(): Promise<void> {
           <el-input v-model="composeForm.Subject" maxlength="200" />
         </el-form-item>
         <el-form-item label="正文">
-          <el-input v-model="composeForm.TextBody" type="textarea" :rows="10" placeholder="请输入邮件正文" />
+          <el-input v-model="composeForm.TextBody" type="textarea" :rows="12" placeholder="请输入邮件正文" />
         </el-form-item>
       </el-form>
       <template #footer>
@@ -451,33 +669,33 @@ async function openMailbox(): Promise<void> {
 
 <style scoped>
 .mail-page {
-  padding: 16px;
   height: 100%;
+  padding: 16px;
   box-sizing: border-box;
+  background: var(--el-bg-color-page);
 }
 .mail-container {
   height: 100%;
   display: flex;
   flex-direction: column;
+  align-items: stretch;
 }
+
+/* 邮箱概览卡片 */
 .mailbox-card {
-  max-width: 560px;
-}
-.card-header {
   display: flex;
-  justify-content: space-between;
-  align-items: center;
+  justify-content: center;
+  padding-top: 10vh;
 }
-.mailbox-info {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  gap: 16px;
-}
-.mailbox-address {
+.mailbox-card-inner {
   display: flex;
   align-items: center;
-  gap: 12px;
+  gap: 20px;
+  background: var(--el-bg-color);
+  border: 1px solid var(--el-border-color-lighter);
+  border-radius: 8px;
+  padding: 32px 40px;
+  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
 }
 .address-text {
   font-size: 20px;
@@ -490,53 +708,309 @@ async function openMailbox(): Promise<void> {
   align-items: center;
   gap: 8px;
 }
-.mail-toolbar {
+.mailbox-actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+/* === 三栏布局 === */
+.mail-shell {
+  flex: 1;
+  display: flex;
+  min-height: 0;
+  background: var(--el-bg-color);
+  border: 1px solid var(--el-border-color-lighter);
+  border-radius: 6px;
+  overflow: hidden;
+}
+
+/* 左栏 */
+.mail-sidebar {
+  width: 200px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  background: var(--el-fill-color-light);
+  border-right: 1px solid var(--el-border-color-lighter);
+}
+.sidebar-account {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 16px 14px 8px;
+}
+.sidebar-account .avatar {
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, #409eff, #66b1ff);
+  color: #fff;
+  font-size: 16px;
+  font-weight: 600;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+}
+.account-name {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.compose-btn {
+  margin: 8px 14px 12px;
+  height: 40px;
+  font-size: 15px;
+  border-radius: 6px;
+  background: linear-gradient(135deg, #409eff, #337ecc);
+  border: none;
+}
+.compose-btn:hover {
+  background: linear-gradient(135deg, #337ecc, #409eff);
+}
+.folder-list {
+  flex: 1;
+  overflow-y: auto;
+  padding-bottom: 8px;
+}
+.folder-item {
   display: flex;
   align-items: center;
   gap: 8px;
-  margin-bottom: 12px;
+  padding: 9px 12px;
+  margin: 2px 10px;
+  border-radius: 6px;
+  cursor: pointer;
+  color: var(--el-text-color-regular);
+  font-size: 14px;
+  transition: background 0.15s;
 }
-.mail-toolbar .spacer {
+.folder-item:hover {
+  background: var(--el-fill-color-light);
+}
+.folder-item.active {
+  background: var(--el-color-primary-light-9);
+  color: var(--el-color-primary);
+  font-weight: 600;
+}
+.folder-icon {
+  font-size: 16px;
+  flex-shrink: 0;
+}
+.folder-name {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.folder-badge {
+  min-width: 18px;
+  height: 18px;
+  line-height: 18px;
+  padding: 0 5px;
+  border-radius: 9px;
+  background: var(--el-color-primary);
+  color: #fff;
+  font-size: 11px;
+  text-align: center;
+}
+.sidebar-footer {
+  display: flex;
+  justify-content: space-between;
+  padding: 8px 6px;
+  border-top: 1px solid var(--el-border-color-lighter);
+}
+
+/* 中栏 */
+.mail-list-pane {
+  width: 330px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  border-right: 1px solid var(--el-border-color-lighter);
+  min-width: 0;
+}
+.list-toolbar {
+  height: 44px;
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 0 10px;
+  border-bottom: 1px solid var(--el-border-color-lighter);
+}
+.list-toolbar .spacer {
   flex: 1;
 }
-.email-table {
+.toolbar-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+.toolbar-count {
+  font-size: 12px;
+  color: var(--el-color-primary);
+}
+.email-list {
+  flex: 1;
+  overflow-y: auto;
+  min-height: 0;
+}
+.email-row {
+  display: flex;
+  gap: 8px;
+  padding: 11px 12px;
+  border-bottom: 1px solid var(--el-border-color-lighter);
   cursor: pointer;
+  transition: background 0.12s;
 }
-.unread-dot {
-  display: inline-block;
-  width: 8px;
-  height: 8px;
-  border-radius: 50%;
-  background: var(--el-color-primary);
+.email-row:hover {
+  background: var(--el-fill-color-light);
 }
-.unread-text {
-  font-weight: 700;
+.email-row.row-active {
+  background: var(--el-color-primary-light-9);
 }
-.email-preview {
-  color: var(--el-text-color-secondary);
+.email-row.row-unread .row-main {
+  border-left: 3px solid var(--el-color-primary);
+  padding-left: 6px;
 }
-.email-date {
+.row-check {
+  display: flex;
+  align-items: flex-start;
+  padding-top: 2px;
+}
+.row-main {
+  flex: 1;
+  min-width: 0;
+}
+.row-top {
   display: flex;
   align-items: center;
-  justify-content: flex-end;
+  justify-content: space-between;
   gap: 8px;
+}
+.row-sender {
+  font-size: 13px;
   color: var(--el-text-color-secondary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.row-sender.txt-unread {
+  color: var(--el-text-color-primary);
+  font-weight: 600;
+}
+.row-date {
+  font-size: 12px;
+  color: var(--el-text-color-placeholder);
+  flex-shrink: 0;
+}
+.row-subject {
+  margin-top: 3px;
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 14px;
+  color: var(--el-text-color-regular);
+}
+.row-subject.txt-unread {
+  color: var(--el-text-color-primary);
+  font-weight: 600;
+}
+.unread-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--el-color-primary);
+  flex-shrink: 0;
+}
+.subject-text {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.row-preview {
+  margin-top: 3px;
+  font-size: 12px;
+  color: var(--el-text-color-placeholder);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+/* 右栏 */
+.mail-read-pane {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  background: var(--el-bg-color);
+}
+.read-toolbar {
+  height: 48px;
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 0 20px;
+  border-bottom: 1px solid var(--el-border-color-lighter);
+}
+.read-toolbar .spacer {
+  flex: 1;
+}
+.read-subject {
+  padding: 20px 24px 0;
+  font-size: 18px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+.read-meta {
+  padding: 12px 24px 0;
+  font-size: 13px;
+  color: var(--el-text-color-regular);
+  line-height: 1.9;
+}
+.read-line {
+  display: flex;
+  gap: 10px;
+}
+.meta-label {
+  color: var(--el-text-color-placeholder);
+  flex-shrink: 0;
+  width: 48px;
+}
+.read-body {
+  flex: 1;
+  overflow-y: auto;
+  padding: 8px 24px 24px;
+  white-space: pre-wrap;
+  word-break: break-word;
+  line-height: 1.8;
+  font-size: 14px;
+  color: var(--el-text-color-primary);
+}
+.read-empty {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 }
 .login-tip {
   color: var(--el-text-color-secondary);
   margin-bottom: 12px;
 }
-.email-detail-meta {
-  line-height: 1.9;
-  color: var(--el-text-color-regular);
-}
-.email-body {
-  white-space: pre-wrap;
-  word-break: break-word;
-  font-family: inherit;
-  line-height: 1.7;
-  max-height: 420px;
-  overflow-y: auto;
-  margin: 0;
+
+/* ===== 深色主题适配 ===== */
+/* 选中态：light-9 背景在深色下过亮，改用半透明主色（与全局 global.scss 约定一致） */
+html.dark {
+  .folder-item.active,
+  .email-row.row-active {
+    background: color-mix(in srgb, var(--el-color-primary) 16%, transparent);
+    color: var(--el-color-primary-light-3);
+  }
 }
 </style>