diff --git a/MongoDB/create_collections.js b/MongoDB/create_collections.js
index 3d60b54..2640ae1 100644
--- a/MongoDB/create_collections.js
+++ b/MongoDB/create_collections.js
@@ -88,4 +88,14 @@ if (!db.getCollectionNames().includes("site_users")) {
 }
 db.site_users.createIndex({ username: 1 }, { unique: true, name: "idx_username", background: true });
 
+// 12. yuheng_cloud_register_records（宇恒云 POST /register 本地留痕：username、password）
+if (!db.getCollectionNames().includes("yuheng_cloud_register_records")) {
+  db.createCollection("yuheng_cloud_register_records");
+  print("已创建集合: yuheng_cloud_register_records");
+}
+db.yuheng_cloud_register_records.createIndex(
+  { created_at: -1 },
+  { name: "idx_created_at", background: true }
+);
+
 print("集合与索引处理完成。");
diff --git a/admin/src/api/admin.js b/admin/src/api/admin.js
index cdbabf2..f4f3995 100644
--- a/admin/src/api/admin.js
+++ b/admin/src/api/admin.js
@@ -28,6 +28,11 @@ export const createUser = (data) => request.post('/admin/users', data)
 export const updateUser = (id, data) => request.put(`/admin/users/${id}`, data)
 export const deleteUser = (id) => request.delete(`/admin/users/${id}`)
 
+// 宇恒云账号（POST 云端 /register + 本地 Mongo 仅记 username/password）
+export const createYuhengCloudAccount = (data) =>
+  request.post('/admin/yuheng-cloud-accounts', data, { timeout: 60000 })
+export const listYuhengCloudAccounts = (params) => request.get('/admin/yuheng-cloud-accounts', { params })
+
 // 工作空间
 export const getWorkspaces = (params) => request.get('/admin/workspaces', { params })
 
@@ -46,6 +51,10 @@ export const updatePaymentConfig = (data) => request.put('/admin/payment-config'
 export const getOfficialSite = () => request.get('/admin/system/official-site')
 export const setOfficialSite = (siteId) => request.put('/admin/system/official-site', { site_id: siteId })
 
+/** 分片上传临时目录清理：保留时长、扫描间隔（需 site:manage） */
+export const getChunkUploadCleanup = () => request.get('/admin/system/chunk-upload-cleanup')
+export const updateChunkUploadCleanup = (data) => request.put('/admin/system/chunk-upload-cleanup', data)
+
 // 站点管理
 export const getSites = () => request.get('/admin/sites')
 export const getSiteById = (id) => request.get(`/admin/sites/${id}`)
@@ -79,8 +88,33 @@ export const uploadSiteAsset = (siteId, file, opts = {}) => {
   if (opts.folder != null) form.append('folder', opts.folder)
   form.append('downloadable', opts.downloadable ? 'true' : 'false')
   if (opts.preserveFilename) form.append('preserve_filename', 'true')
-  return request.post(`/admin/sites/${siteId}/assets`, form, { headers: { 'Content-Type': 'multipart/form-data' } })
+  // 大文件上传：timeout 0 = Axios 不设置请求超时（仍可能受浏览器/系统/代理断开影响）
+  // 超大文件请用分片 API（见 uploadSiteAssetWithResume）
+  return request.post(`/admin/sites/${siteId}/assets`, form, {
+    headers: { 'Content-Type': 'multipart/form-data' },
+    timeout: 0
+  })
 }
+
+/** 分片上传：创建会话（断点续传） */
+export const initMultipartUpload = (siteId, body) =>
+  request.post(`/admin/sites/${siteId}/assets/init-multipart`, body, { timeout: 60000 })
+
+export const getMultipartUploadStatus = (siteId, uploadId) =>
+  request.get(`/admin/sites/${siteId}/assets/multipart/${uploadId}/status`, { timeout: 60000 })
+
+export const putMultipartChunk = (siteId, uploadId, chunkIndex, blob) =>
+  request.put(`/admin/sites/${siteId}/assets/multipart/${uploadId}/chunk/${chunkIndex}`, blob, {
+    headers: { 'Content-Type': 'application/octet-stream' },
+    timeout: 180000
+  })
+
+export const completeMultipartUpload = (siteId, uploadId) =>
+  request.post(`/admin/sites/${siteId}/assets/multipart/${uploadId}/complete`, {}, { timeout: 600000 })
+
+export const abortMultipartUpload = (siteId, uploadId) =>
+  request.delete(`/admin/sites/${siteId}/assets/multipart/${uploadId}`, { timeout: 60000 })
+
 export const createSiteFolder = (siteId, path) => request.post(`/admin/sites/${siteId}/folders`, { path })
 export const deleteSiteAsset = (siteId, id) => request.delete(`/admin/sites/${siteId}/assets/${id}`)
 
diff --git a/admin/src/layouts/AdminLayout.vue b/admin/src/layouts/AdminLayout.vue
index 32f1830..a840e65 100644
--- a/admin/src/layouts/AdminLayout.vue
+++ b/admin/src/layouts/AdminLayout.vue
@@ -43,7 +43,7 @@
 <script setup>
 import { computed, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
-import { House, User, Folder, ChatDotRound, Setting, Wallet, Monitor, Document, EditPen, Upload, Key, VideoCamera } from '@element-plus/icons-vue'
+import { House, User, Folder, ChatDotRound, Setting, Wallet, Monitor, Document, EditPen, Upload, Key, VideoCamera, Timer, Link } from '@element-plus/icons-vue'
 import { useAuthStore } from '../stores/auth'
 import { getMyPermissions } from '../api/admin'
 
@@ -69,6 +69,8 @@ const menuItems = computed(() => {
     { index: '/sms-config', title: '短信配置', icon: Setting, permission: 'sms_config' },
     { index: '/payment-config', title: '支付配置', icon: Wallet, permission: 'payment_config' },
     { index: '/sites', title: '站点管理', icon: Monitor, permission: 'site:manage' },
+    { index: '/chunk-upload-cleanup', title: '分片上传清理', icon: Timer, permission: 'site:manage' },
+    { index: '/yuheng-cloud-accounts', title: '宇恒云账号', icon: Link, permission: 'yuheng_cloud:manage' },
     { index: '/pages', title: '网页管理', icon: Document, permission: 'page:manage' },
     { index: '/homepage-edit', title: '首页编辑', icon: EditPen, permission: 'homepage:edit' },
     { index: '/live-broadcast', title: '视频直播开播', icon: VideoCamera, permission: 'homepage:edit' },
diff --git a/admin/src/router/index.js b/admin/src/router/index.js
index fbcfdd9..baf8bfb 100644
--- a/admin/src/router/index.js
+++ b/admin/src/router/index.js
@@ -48,6 +48,18 @@ const routes = [
         component: () => import('../views/settings/PaymentConfig.vue'),
         meta: { title: '支付配置', permission: 'payment_config' }
       },
+      {
+        path: 'chunk-upload-cleanup',
+        name: 'ChunkUploadCleanup',
+        component: () => import('../views/settings/ChunkUploadCleanup.vue'),
+        meta: { title: '分片上传清理', permission: 'site:manage' }
+      },
+      {
+        path: 'yuheng-cloud-accounts',
+        name: 'YuhengCloudAccountManage',
+        component: () => import('../views/settings/YuhengCloudAccountManage.vue'),
+        meta: { title: '宇恒云账号', permission: 'yuheng_cloud:manage' }
+      },
       {
         path: 'sites',
         name: 'Sites',
diff --git a/admin/src/utils/siteAssetResumableUpload.js b/admin/src/utils/siteAssetResumableUpload.js
new file mode 100644
index 0000000..3612244
--- /dev/null
+++ b/admin/src/utils/siteAssetResumableUpload.js
@@ -0,0 +1,152 @@
+import {
+  abortMultipartUpload,
+  completeMultipartUpload,
+  getMultipartUploadStatus,
+  initMultipartUpload,
+  putMultipartChunk,
+  uploadSiteAsset
+} from '../api/admin'
+
+const CHUNK_THRESHOLD = 8 * 1024 * 1024
+const DEFAULT_CHUNK_SIZE = 4 * 1024 * 1024
+const UPLOAD_CONCURRENCY = 3
+
+function fileFingerprint(file) {
+  return `${file.name}\t${file.size}\t${file.lastModified}`
+}
+
+function storageKey(siteId) {
+  return `yh_resumable_asset_${siteId}`
+}
+
+/**
+ * 站点资源上传：小于阈值整包 POST；大于等于阈值走分片 + sessionStorage 断点续传（同文件同站点刷新后可续传）。
+ * @param {string} siteId
+ * @param {File|Blob} file
+ * @param {{ folder?: string, downloadable?: boolean, preserveFilename?: boolean }} opts
+ * @param {{ onProgress?: (p: { percent: number, loaded: number, total: number }) => void }} callbacks
+ */
+export async function uploadSiteAssetWithResume(siteId, file, opts = {}, callbacks = {}) {
+  const onProgress = typeof callbacks.onProgress === 'function' ? callbacks.onProgress : null
+  const total = file.size
+  if (total <= CHUNK_THRESHOLD) {
+    if (onProgress) onProgress({ percent: 0, loaded: 0, total })
+    const res = await uploadSiteAsset(siteId, file, opts)
+    if (onProgress) onProgress({ percent: 100, loaded: total, total })
+    return res
+  }
+
+  const fp = fileFingerprint(file)
+  const key = storageKey(siteId)
+  let uploadId = null
+  let chunkSize = DEFAULT_CHUNK_SIZE
+  let totalChunks = 0
+  const received = new Set()
+
+  let cached = null
+  try {
+    cached = JSON.parse(sessionStorage.getItem(key) || 'null')
+  } catch (_) {
+    cached = null
+  }
+
+  if (cached && cached.fingerprint === fp && cached.upload_id) {
+    try {
+      const st = await getMultipartUploadStatus(siteId, cached.upload_id)
+      if (
+        st.total_size === file.size &&
+        st.original_filename === file.name &&
+        typeof st.chunk_size === 'number' &&
+        st.chunk_size > 0
+      ) {
+        uploadId = cached.upload_id
+        chunkSize = st.chunk_size
+        totalChunks = st.total_chunks
+        for (const i of st.received_chunks || []) {
+          received.add(i)
+        }
+      }
+    } catch (_) {
+      uploadId = null
+      received.clear()
+    }
+  }
+
+  if (!uploadId) {
+    const init = await initMultipartUpload(siteId, {
+      filename: file.name,
+      total_size: file.size,
+      chunk_size: DEFAULT_CHUNK_SIZE,
+      folder: opts.folder || '',
+      downloadable: Boolean(opts.downloadable),
+      preserve_filename: Boolean(opts.preserveFilename)
+    })
+    uploadId = init.upload_id
+    chunkSize = init.chunk_size || DEFAULT_CHUNK_SIZE
+    totalChunks = init.total_chunks
+    sessionStorage.setItem(key, JSON.stringify({ fingerprint: fp, upload_id: uploadId, total_chunks: totalChunks }))
+  }
+
+  const missing = []
+  for (let i = 0; i < totalChunks; i++) {
+    if (!received.has(i)) missing.push(i)
+  }
+
+  const chunkByteLength = (idx) => {
+    const start = idx * chunkSize
+    const end = Math.min(start + chunkSize, file.size)
+    return end - start
+  }
+
+  let uploadedBytes = 0
+  for (let i = 0; i < totalChunks; i++) {
+    if (received.has(i)) uploadedBytes += chunkByteLength(i)
+  }
+
+  const reportProgress = () => {
+    if (!onProgress) return
+    const pct = total <= 0 ? 100 : Math.min(99, Math.round((uploadedBytes / total) * 100))
+    onProgress({ percent: pct, loaded: uploadedBytes, total })
+  }
+  reportProgress()
+
+  const queue = [...missing]
+  const worker = async () => {
+    while (queue.length) {
+      const idx = queue.shift()
+      if (idx === undefined) break
+      const start = idx * chunkSize
+      const end = Math.min(start + chunkSize, file.size)
+      const blob = file.slice(start, end)
+      await putMultipartChunk(siteId, uploadId, idx, blob)
+      uploadedBytes += end - start
+      reportProgress()
+    }
+  }
+  await Promise.all(Array.from({ length: Math.min(UPLOAD_CONCURRENCY, Math.max(1, missing.length)) }, () => worker()))
+
+  const done = await completeMultipartUpload(siteId, uploadId)
+  try {
+    sessionStorage.removeItem(key)
+  } catch (_) {}
+  if (onProgress) onProgress({ percent: 100, loaded: total, total })
+  return done
+}
+
+/** 放弃当前站点的分片会话（可选） */
+export async function abortSiteAssetResumable(siteId) {
+  const key = storageKey(siteId)
+  let cached = null
+  try {
+    cached = JSON.parse(sessionStorage.getItem(key) || 'null')
+  } catch (_) {
+    cached = null
+  }
+  if (!cached?.upload_id) return
+  try {
+    await abortMultipartUpload(siteId, cached.upload_id)
+  } catch (_) {}
+  try {
+    sessionStorage.removeItem(key)
+  } catch (_) {}
+}
diff --git a/admin/src/views/files/FileManage.vue b/admin/src/views/files/FileManage.vue
index 7405c9d..3a011ae 100644
--- a/admin/src/views/files/FileManage.vue
+++ b/admin/src/views/files/FileManage.vue
@@ -57,6 +57,7 @@
 
     <!-- 上传前选择是否可下载 -->
     <el-dialog v-model="uploadDialogVisible" title="上传文件" width="440px" :close-on-click-modal="false">
+      <p class="upload-resume-hint">≥8MB 将自动分片上传；中断后<strong>同一文件</strong>再次选择上传可续传（勿改文件名/大小）。</p>
       <el-form label-width="112px">
         <el-form-item label="当前目录">
           <span>{{ currentPath || '根目录' }}</span>
@@ -68,6 +69,9 @@
         <el-form-item label="允许下载">
           <el-switch v-model="uploadDownloadable" />
         </el-form-item>
+        <el-form-item v-if="uploading && uploadPercent > 0" label="进度">
+          <el-progress :percentage="uploadPercent" :stroke-width="16" />
+        </el-form-item>
       </el-form>
       <template #footer>
         <el-button @click="uploadDialogVisible = false">取消</el-button>
@@ -93,7 +97,8 @@
 <script setup>
 import { ref, computed, watch, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { getSites, getSiteAssets, uploadSiteAsset, deleteSiteAsset, createSiteFolder } from '../../api/admin'
+import { getSites, getSiteAssets, deleteSiteAsset, createSiteFolder } from '../../api/admin'
+import { uploadSiteAssetWithResume } from '../../utils/siteAssetResumableUpload'
 
 const activeTab = ref('module')
 const siteId = ref('')
@@ -103,6 +108,7 @@ const subDirs = ref([])
 const loading = ref(false)
 const currentPath = ref('')
 const uploading = ref(false)
+const uploadPercent = ref(0)
 const uploadDialogVisible = ref(false)
 const uploadDownloadable = ref(false)
 const uploadPreserveFilename = ref(false)
@@ -167,12 +173,22 @@ const beforeUpload = (file) => {
 const doUpload = async () => {
   if (!pendingFile.value || !siteId.value) return
   uploading.value = true
+  uploadPercent.value = 0
   try {
-    await uploadSiteAsset(siteId.value, pendingFile.value, {
-      folder: currentPath.value || undefined,
-      downloadable: uploadDownloadable.value,
-      preserveFilename: uploadPreserveFilename.value
-    })
+    await uploadSiteAssetWithResume(
+      siteId.value,
+      pendingFile.value,
+      {
+        folder: currentPath.value || undefined,
+        downloadable: uploadDownloadable.value,
+        preserveFilename: uploadPreserveFilename.value
+      },
+      {
+        onProgress: ({ percent }) => {
+          uploadPercent.value = percent
+        }
+      }
+    )
     ElMessage.success('上传成功')
     uploadDialogVisible.value = false
     pendingFile.value = null
@@ -181,6 +197,7 @@ const doUpload = async () => {
     ElMessage.error(e.response?.data?.error || e.message || '上传失败')
   } finally {
     uploading.value = false
+    uploadPercent.value = 0
   }
 }
 
@@ -230,4 +247,10 @@ onMounted(() => fetchSites().then(() => fetchList()))
 .breadcrumb-wrap { margin-top: 12px; }
 .subdirs { margin-top: 8px; font-size: 13px; color: #666; }
 .subdirs .label { margin-right: 8px; }
+.upload-resume-hint {
+  margin: 0 0 12px;
+  font-size: 12px;
+  color: #606266;
+  line-height: 1.5;
+}
 </style>
diff --git a/admin/src/views/settings/ChunkUploadCleanup.vue b/admin/src/views/settings/ChunkUploadCleanup.vue
new file mode 100644
index 0000000..a5d9e11
--- /dev/null
+++ b/admin/src/views/settings/ChunkUploadCleanup.vue
@@ -0,0 +1,91 @@
+<template>
+  <div class="chunk-upload-cleanup">
+    <el-card>
+      <template #header>
+        <span>分片上传临时目录清理</span>
+      </template>
+      <p class="hint">
+        大文件分片上传时，未完成合并的会话保存在上传目录下的 <code>.chunk-uploads</code>。超过下方「保留时长」的目录会被定期删除。未在后台保存时，可使用环境变量
+        <code>YH_CHUNK_UPLOAD_MAX_AGE_HOURS</code>、<code>YH_CHUNK_UPLOAD_SWEEP_MINUTES</code>（保存后台配置后优先生效）。
+      </p>
+      <el-form v-if="canEdit" :model="form" label-width="140px" style="max-width: 520px">
+        <el-form-item label="保留时长（小时）">
+          <el-input-number v-model="form.max_age_hours" :min="6" :max="336" :step="6" controls-position="right" />
+          <span class="form-tip">6～336，默认 72；超过此时长未合并的会话视为非活动</span>
+        </el-form-item>
+        <el-form-item label="扫描间隔（分钟）">
+          <el-input-number v-model="form.sweep_minutes" :min="5" :max="1440" :step="5" controls-position="right" />
+          <span class="form-tip">5～1440，默认 60；服务端按此频率检查是否需清扫</span>
+        </el-form-item>
+        <el-form-item>
+          <el-button type="primary" :loading="loading" @click="handleSave">保存</el-button>
+        </el-form-item>
+      </el-form>
+      <el-alert v-else type="warning" title="无权限" description="需要「站点管理」权限。" :closable="false" />
+    </el-card>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, onMounted, computed } from 'vue'
+import { ElMessage } from 'element-plus'
+import { getChunkUploadCleanup, updateChunkUploadCleanup } from '../../api/admin'
+import { useAuthStore } from '../../stores/auth'
+
+const authStore = useAuthStore()
+const loading = ref(false)
+const form = reactive({
+  max_age_hours: 72,
+  sweep_minutes: 60
+})
+
+const canEdit = computed(() => authStore.hasPermission('site:manage'))
+
+const fetchConfig = async () => {
+  if (!canEdit.value) return
+  try {
+    const res = await getChunkUploadCleanup()
+    form.max_age_hours = Number(res.max_age_hours) || 72
+    form.sweep_minutes = Number(res.sweep_minutes) || 60
+  } catch (e) {
+    ElMessage.error(e.message || '获取配置失败')
+  }
+}
+
+const handleSave = async () => {
+  loading.value = true
+  try {
+    await updateChunkUploadCleanup({
+      max_age_hours: form.max_age_hours,
+      sweep_minutes: form.sweep_minutes
+    })
+    ElMessage.success('保存成功，新参数在下次清扫周期生效')
+  } catch (e) {
+    ElMessage.error(e.response?.data?.error || e.message || '保存失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+onMounted(fetchConfig)
+</script>
+
+<style scoped>
+.chunk-upload-cleanup {
+  padding: 0;
+}
+.hint {
+  margin: 0 0 20px;
+  font-size: 13px;
+  color: #606266;
+  line-height: 1.65;
+  max-width: 720px;
+}
+.form-tip {
+  display: block;
+  margin-top: 6px;
+  font-size: 12px;
+  color: #909399;
+  line-height: 1.4;
+}
+</style>
diff --git a/admin/src/views/settings/YuhengCloudAccountManage.vue b/admin/src/views/settings/YuhengCloudAccountManage.vue
new file mode 100644
index 0000000..4c9377a
--- /dev/null
+++ b/admin/src/views/settings/YuhengCloudAccountManage.vue
@@ -0,0 +1,154 @@
+<template>
+  <div class="yh-cloud-accounts">
+    <el-card>
+      <template #header>
+        <span>宇恒云账号管理</span>
+      </template>
+      <p class="hint">
+        调用云端
+        <code>POST /register</code>（默认
+        <code>http://www.cloud.yuxindazhineng.com:3001/register</code>，可通过环境变量
+        <code>YH_CLOUD_REGISTER_URL</code> 覆盖）。成功后在 Mongo 集合
+        <code>yuheng_cloud_register_records</code> 写入一条记录，<strong>仅保存账号与密码</strong>；邮箱仅用于提交云端。
+      </p>
+
+      <el-form v-if="canEdit" :model="form" :rules="rules" ref="formRef" label-width="88px" class="add-form">
+        <el-form-item label="用户名" prop="username">
+          <el-input v-model="form.username" placeholder="云端 username" clearable style="max-width: 360px" />
+        </el-form-item>
+        <el-form-item label="密码" prop="password">
+          <el-input v-model="form.password" type="password" placeholder="云端 password" show-password clearable style="max-width: 360px" />
+        </el-form-item>
+        <el-form-item label="邮箱" prop="email">
+          <el-input v-model="form.email" placeholder="云端必填 email，不入库" clearable style="max-width: 360px" />
+        </el-form-item>
+        <el-form-item>
+          <el-button type="primary" :loading="submitting" @click="submit">提交注册</el-button>
+        </el-form-item>
+      </el-form>
+      <el-alert v-else type="warning" title="无权限" description="需要「宇恒云账号管理」权限，请在角色权限中为当前角色勾选。" :closable="false" />
+
+      <el-divider v-if="canEdit" />
+
+      <el-table v-if="canEdit" :data="list" v-loading="loading" stripe>
+        <el-table-column prop="username" label="账号" min-width="140" />
+        <el-table-column label="密码" min-width="160">
+          <template #default="{ row }">
+            <span class="pwd-mask">{{ row._showPwd ? row.password : '••••••••' }}</span>
+            <el-button link type="primary" size="small" @click="row._showPwd = !row._showPwd">
+              {{ row._showPwd ? '隐藏' : '显示' }}
+            </el-button>
+          </template>
+        </el-table-column>
+        <el-table-column prop="created_at" label="记录时间" width="200" />
+      </el-table>
+      <el-pagination
+        v-if="canEdit"
+        v-model:current-page="page"
+        v-model:page-size="pageSize"
+        :total="total"
+        :page-sizes="[10, 20, 50]"
+        layout="total, sizes, prev, pager, next"
+        style="margin-top: 16px"
+        @current-change="fetchList"
+        @size-change="fetchList"
+      />
+    </el-card>
+  </div>
+</template>
+
+<script setup>
+import { ref, reactive, computed, onMounted } from 'vue'
+import { ElMessage } from 'element-plus'
+import { createYuhengCloudAccount, listYuhengCloudAccounts } from '../../api/admin'
+import { useAuthStore } from '../../stores/auth'
+
+const authStore = useAuthStore()
+const canEdit = computed(() => authStore.hasPermission('yuheng_cloud:manage'))
+
+const formRef = ref(null)
+const submitting = ref(false)
+const loading = ref(false)
+const list = ref([])
+const total = ref(0)
+const page = ref(1)
+const pageSize = ref(20)
+
+const form = reactive({
+  username: '',
+  password: '',
+  email: ''
+})
+
+const rules = {
+  username: [{ required: true, message: '请输入用户名', trigger: 'blur' }],
+  password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
+  email: [{ required: true, message: '请输入邮箱（提交云端）', trigger: 'blur' }]
+}
+
+const fetchList = async () => {
+  if (!canEdit.value) return
+  loading.value = true
+  try {
+    const res = await listYuhengCloudAccounts({ page: page.value, page_size: pageSize.value })
+    const rows = (res.list || []).map((r) => ({ ...r, _showPwd: false }))
+    list.value = rows
+    total.value = res.total ?? 0
+  } catch (e) {
+    ElMessage.error(e.message || '加载失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const submit = async () => {
+  if (!formRef.value) return
+  try {
+    await formRef.value.validate()
+  } catch {
+    return
+  }
+  submitting.value = true
+  try {
+    await createYuhengCloudAccount({
+      username: form.username.trim(),
+      password: form.password,
+      email: form.email.trim()
+    })
+    ElMessage.success('云端注册成功，已写入本地记录')
+    form.username = ''
+    form.password = ''
+    form.email = ''
+    formRef.value?.resetFields()
+    fetchList()
+  } catch (e) {
+    ElMessage.error(e.response?.data?.error || e.message || '提交失败')
+  } finally {
+    submitting.value = false
+  }
+}
+
+onMounted(() => {
+  if (canEdit.value) fetchList()
+})
+</script>
+
+<style scoped>
+.yh-cloud-accounts {
+  padding: 0;
+}
+.hint {
+  margin: 0 0 16px;
+  font-size: 13px;
+  color: #606266;
+  line-height: 1.65;
+  max-width: 900px;
+}
+.add-form {
+  max-width: 520px;
+}
+.pwd-mask {
+  margin-right: 8px;
+  font-family: monospace;
+}
+</style>
diff --git a/admin/src/views/sites/ModuleUpload.vue b/admin/src/views/sites/ModuleUpload.vue
index 953576a..fd29814 100644
--- a/admin/src/views/sites/ModuleUpload.vue
+++ b/admin/src/views/sites/ModuleUpload.vue
@@ -43,7 +43,8 @@
 <script setup>
 import { ref, onMounted, watch } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { getSites, getSiteAssets, uploadSiteAsset, deleteSiteAsset } from '../../api/admin'
+import { getSites, getSiteAssets, deleteSiteAsset } from '../../api/admin'
+import { uploadSiteAssetWithResume } from '../../utils/siteAssetResumableUpload'
 
 const siteId = ref('')
 const sites = ref([])
@@ -87,7 +88,7 @@ watch(siteId, fetchList)
 const beforeUpload = async (file) => {
   uploading.value = true
   try {
-    await uploadSiteAsset(siteId.value, file)
+    await uploadSiteAssetWithResume(siteId.value, file, {})
     ElMessage.success('上传成功')
     fetchList()
   } catch (e) {
diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index f9efefa..f8e3789 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -1,6 +1,8 @@
 server {
     listen 80;
     server_name yuheng.yuxindazhineng.com;
+    # 与宿主机 yuheng.host.conf 一致，避免后台大文件上传被默认 1m 拒绝
+    client_max_body_size 800m;
     # 若使用 HTTPS，取消下面注释并挂载证书到 /etc/nginx/ssl/
     # listen 443 ssl;
     # ssl_certificate     /etc/nginx/ssl/fullchain.pem;
@@ -38,8 +40,9 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_connect_timeout 75s;
-        proxy_send_timeout 75s;
-        proxy_read_timeout 75s;
+        client_body_timeout 0;
+        proxy_send_timeout 86400s;
+        proxy_read_timeout 86400s;
         proxy_buffering off;
     }
 
diff --git a/nginx/yuheng.docker.conf.tpl b/nginx/yuheng.docker.conf.tpl
index c1a3d5f..2bd0429 100644
--- a/nginx/yuheng.docker.conf.tpl
+++ b/nginx/yuheng.docker.conf.tpl
@@ -71,6 +71,11 @@ server {
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_connect_timeout 75s;
+        client_body_timeout 0;
+        proxy_send_timeout 86400s;
+        proxy_read_timeout 86400s;
+        proxy_buffering off;
     }
 
     # 尾斜杠形式：proxy_pass 带 / 会去掉 /admin 前缀，上游收到 /assets/…、/index.html 等
diff --git a/nginx/yuheng.host.conf b/nginx/yuheng.host.conf
index f8f544f..a379584 100644
--- a/nginx/yuheng.host.conf
+++ b/nginx/yuheng.host.conf
@@ -77,8 +77,10 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_connect_timeout 75s;
-        proxy_send_timeout 300s;
-        proxy_read_timeout 300s;
+        # 大文件上传：client_body_timeout=0 表示不按时间切断读 body（见 ngx_http_core_module）；proxy_* 为反代到 Go 的读写等待上限
+        client_body_timeout 0;
+        proxy_send_timeout 86400s;
+        proxy_read_timeout 86400s;
         proxy_buffering off;
     }
 
diff --git a/server/handlers/chunk_upload_cleanup_config.go b/server/handlers/chunk_upload_cleanup_config.go
new file mode 100644
index 0000000..8dd78f5
--- /dev/null
+++ b/server/handlers/chunk_upload_cleanup_config.go
@@ -0,0 +1,163 @@
+package handlers
+
+import (
+	"context"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"yh_web/server/config"
+
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+const chunkCleanupConfigID = "chunk_upload_cleanup"
+
+type chunkCleanupConfigDoc struct {
+	MaxAgeHours  float64 `bson:"max_age_hours" json:"max_age_hours"`
+	SweepMinutes int     `bson:"sweep_minutes" json:"sweep_minutes"`
+}
+
+func maxAgeFromEnv() time.Duration {
+	h := strings.TrimSpace(os.Getenv("YH_CHUNK_UPLOAD_MAX_AGE_HOURS"))
+	if h == "" {
+		return 72 * time.Hour
+	}
+	v, err := strconv.ParseFloat(h, 64)
+	if err != nil || v < 6 {
+		return 72 * time.Hour
+	}
+	return time.Duration(v * float64(time.Hour))
+}
+
+func sweepFromEnv() time.Duration {
+	m := strings.TrimSpace(os.Getenv("YH_CHUNK_UPLOAD_SWEEP_MINUTES"))
+	if m == "" {
+		return time.Hour
+	}
+	v, err := strconv.Atoi(m)
+	if err != nil || v < 5 {
+		return time.Hour
+	}
+	return time.Duration(v) * time.Minute
+}
+
+func normalizeMaxAgeHours(h float64) time.Duration {
+	if h < 6 {
+		return 6 * time.Hour
+	}
+	if h > 336 {
+		return 336 * time.Hour
+	}
+	return time.Duration(h * float64(time.Hour))
+}
+
+func normalizeSweepMinutes(m int) time.Duration {
+	if m < 5 {
+		return 5 * time.Minute
+	}
+	if m > 1440 {
+		return 1440 * time.Minute
+	}
+	return time.Duration(m) * time.Minute
+}
+
+// loadChunkCleanupParameters 优先读 MongoDB system_config；无文档时用环境变量；用于定时清扫
+func loadChunkCleanupParameters() (maxAge time.Duration, sweepEvery time.Duration) {
+	db := config.GetDB(config.DBName)
+	if db != nil {
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		var doc chunkCleanupConfigDoc
+		err := db.Collection("system_config").FindOne(ctx, bson.M{"_id": chunkCleanupConfigID}).Decode(&doc)
+		if err == nil && doc.MaxAgeHours >= 6 && doc.SweepMinutes >= 5 {
+			return normalizeMaxAgeHours(doc.MaxAgeHours), normalizeSweepMinutes(doc.SweepMinutes)
+		}
+	}
+	return maxAgeFromEnv(), sweepFromEnv()
+}
+
+// GetChunkUploadCleanupConfig 后台读取当前保存的配置（无文档时返回默认值）
+func GetChunkUploadCleanupConfig(c *gin.Context) {
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusOK, chunkCleanupConfigDoc{
+			MaxAgeHours:  72,
+			SweepMinutes: 60,
+		})
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	var doc chunkCleanupConfigDoc
+	err := db.Collection("system_config").FindOne(ctx, bson.M{"_id": chunkCleanupConfigID}).Decode(&doc)
+	if err != nil {
+		if err == mongo.ErrNoDocuments {
+			c.JSON(http.StatusOK, chunkCleanupConfigDoc{
+				MaxAgeHours:  72,
+				SweepMinutes: 60,
+			})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if doc.MaxAgeHours < 6 {
+		doc.MaxAgeHours = 72
+	}
+	if doc.SweepMinutes < 5 {
+		doc.SweepMinutes = 60
+	}
+	c.JSON(http.StatusOK, doc)
+}
+
+// ChunkUploadCleanupUpdateInput 后台保存
+type ChunkUploadCleanupUpdateInput struct {
+	MaxAgeHours  float64 `json:"max_age_hours" binding:"required"`
+	SweepMinutes int     `json:"sweep_minutes" binding:"required"`
+}
+
+// UpdateChunkUploadCleanupConfig 保存分片临时目录保留时长与扫描间隔
+func UpdateChunkUploadCleanupConfig(c *gin.Context) {
+	var input ChunkUploadCleanupUpdateInput
+	if err := c.ShouldBindJSON(&input); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	if input.MaxAgeHours < 6 || input.MaxAgeHours > 336 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "保留时长须在 6～336 小时之间"})
+		return
+	}
+	if input.SweepMinutes < 5 || input.SweepMinutes > 1440 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "扫描间隔须在 5～1440 分钟之间"})
+		return
+	}
+
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "数据库未连接，无法保存"})
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 8*time.Second)
+	defer cancel()
+	coll := db.Collection("system_config")
+	set := bson.M{
+		"_id":             chunkCleanupConfigID,
+		"max_age_hours":   input.MaxAgeHours,
+		"sweep_minutes":   input.SweepMinutes,
+		"updated_at":      time.Now().Format(time.RFC3339),
+		"updated_by_hint": "admin",
+	}
+	opts := options.UpdateOne().SetUpsert(true)
+	_, err := coll.UpdateOne(ctx, bson.M{"_id": chunkCleanupConfigID}, bson.M{"$set": set}, opts)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "配置已保存"})
+}
diff --git a/server/handlers/module_upload.go b/server/handlers/module_upload.go
index cddb344..f346cab 100644
--- a/server/handlers/module_upload.go
+++ b/server/handlers/module_upload.go
@@ -207,6 +207,42 @@ func ServePromotionMedia(c *gin.Context) {
 	c.File(fullPath)
 }
 
+// computeSiteUploadDest 与整文件上传、分片合并完成时一致的目标路径（非 preserve 时 saveName 含当前时间戳）
+func computeSiteUploadDest(siteID, folder, originalFilename string, preserve bool) (relPath, destPath string, errMsg string) {
+	name := originalFilename
+	ext := filepath.Ext(name)
+	nameNoExt := strings.TrimSuffix(name, ext)
+	var saveName string
+	if preserve {
+		saveName = filepath.Base(name)
+		if saveName == "." || saveName == string(filepath.Separator) || saveName == "" {
+			return "", "", "无效的文件名"
+		}
+	} else {
+		if len(ext) == 0 {
+			saveName = nameNoExt + "_" + time.Now().Format("20060102150405")
+		} else {
+			saveName = nameNoExt + "_" + time.Now().Format("20060102150405") + ext
+		}
+	}
+
+	folderClean := ""
+	if folder != "" {
+		folderClean = filepath.ToSlash(filepath.Clean(folder))
+		if strings.HasPrefix(folderClean, "../") || strings.Contains(folderClean, "/../") {
+			return "", "", "无效的目录路径"
+		}
+	}
+
+	if folderClean != "" {
+		relPath = filepath.ToSlash(filepath.Join("sites", siteID, folderClean, saveName))
+	} else {
+		relPath = filepath.ToSlash(filepath.Join("sites", siteID, saveName))
+	}
+	destPath = filepath.Join(getUploadDir(), filepath.FromSlash(relPath))
+	return relPath, destPath, ""
+}
+
 // UploadSiteAsset 上传功能模块/文件；form 可选：folder（当前目录相对路径）、downloadable（true/false）、preserve_filename（true 时保持原名并覆盖同路径旧文件，用于首页推广视频固定 URL）
 func UploadSiteAsset(c *gin.Context) {
 	siteID := c.Param("site_id")
@@ -225,41 +261,12 @@ func UploadSiteAsset(c *gin.Context) {
 	downloadable := c.PostForm("downloadable") == "true" || c.PostForm("downloadable") == "1"
 	preserve := c.PostForm("preserve_filename") == "true" || c.PostForm("preserve_filename") == "1"
 
-	name := file.Filename
-	ext := filepath.Ext(name)
-	nameNoExt := strings.TrimSuffix(name, ext)
-	var saveName string
-	if preserve {
-		saveName = filepath.Base(name)
-		if saveName == "." || saveName == string(filepath.Separator) || saveName == "" {
-			c.JSON(http.StatusBadRequest, gin.H{"error": "无效的文件名"})
-			return
-		}
-	} else {
-		if len(ext) == 0 {
-			saveName = nameNoExt + "_" + time.Now().Format("20060102150405")
-		} else {
-			saveName = nameNoExt + "_" + time.Now().Format("20060102150405") + ext
-		}
+	relPath, destPath, errMsg := computeSiteUploadDest(siteID, folder, file.Filename, preserve)
+	if errMsg != "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": errMsg})
+		return
 	}
 
-	folderClean := ""
-	if folder != "" {
-		folderClean = filepath.ToSlash(filepath.Clean(folder))
-		if strings.HasPrefix(folderClean, "../") || strings.Contains(folderClean, "/../") {
-			c.JSON(http.StatusBadRequest, gin.H{"error": "无效的目录路径"})
-			return
-		}
-	}
-
-	var relPath string
-	if folderClean != "" {
-		relPath = filepath.ToSlash(filepath.Join("sites", siteID, folderClean, saveName))
-	} else {
-		relPath = filepath.ToSlash(filepath.Join("sites", siteID, saveName))
-	}
-	destPath := filepath.Join(getUploadDir(), filepath.FromSlash(relPath))
-
 	if preserve {
 		ctxDel, cancelDel := context.WithTimeout(context.Background(), 8*time.Second)
 		defer cancelDel()
diff --git a/server/handlers/multipart_upload.go b/server/handlers/multipart_upload.go
new file mode 100644
index 0000000..ba96dce
--- /dev/null
+++ b/server/handlers/multipart_upload.go
@@ -0,0 +1,501 @@
+package handlers
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"yh_web/server/config"
+	"yh_web/server/pkg/logger"
+
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// 与 Nginx client_max_body_size 对齐；分片单请求仅 chunk_size 字节量级
+const maxMultipartTotalSize = int64(800 << 20)
+const defaultChunkSize = int64(4 << 20)
+const minChunkSize = int64(1 << 20)
+const maxChunkSize = int64(32 << 20)
+
+type chunkSessionMeta struct {
+	SiteID           string `json:"site_id"`
+	OriginalFilename string `json:"original_filename"`
+	TotalSize        int64  `json:"total_size"`
+	ChunkSize        int64  `json:"chunk_size"`
+	TotalChunks      int    `json:"total_chunks"`
+	Folder           string `json:"folder"`
+	Downloadable     bool   `json:"downloadable"`
+	PreserveFilename bool   `json:"preserve_filename"`
+	CreatedUnix      int64  `json:"created_unix"`
+}
+
+func chunkSessionsRoot() string {
+	return filepath.Join(getUploadDir(), ".chunk-uploads")
+}
+
+func chunkSessionDir(uploadID string) string {
+	return filepath.Join(chunkSessionsRoot(), uploadID)
+}
+
+func metaPath(uploadID string) string {
+	return filepath.Join(chunkSessionDir(uploadID), "meta.json")
+}
+
+func validUploadID(uploadID string) bool {
+	if len(uploadID) != 24 {
+		return false
+	}
+	for _, c := range uploadID {
+		if (c < '0' || c > '9') && (c < 'a' || c > 'f') {
+			return false
+		}
+	}
+	_, err := bson.ObjectIDFromHex(uploadID)
+	return err == nil
+}
+
+func readChunkMeta(uploadID string) (*chunkSessionMeta, error) {
+	data, err := os.ReadFile(metaPath(uploadID))
+	if err != nil {
+		return nil, err
+	}
+	var m chunkSessionMeta
+	if err := json.Unmarshal(data, &m); err != nil {
+		return nil, err
+	}
+	return &m, nil
+}
+
+func chunkExpectedSize(meta *chunkSessionMeta, index int) int64 {
+	if index < 0 || index >= meta.TotalChunks {
+		return -1
+	}
+	start := int64(index) * meta.ChunkSize
+	end := start + meta.ChunkSize
+	if end > meta.TotalSize {
+		end = meta.TotalSize
+	}
+	return end - start
+}
+
+// InitMultipartUpload 创建分片会话（断点续传第一步）
+func InitMultipartUpload(c *gin.Context) {
+	siteID := c.Param("site_id")
+	if siteID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请提供 site_id"})
+		return
+	}
+	var body struct {
+		Filename         string `json:"filename" binding:"required"`
+		TotalSize        int64  `json:"total_size" binding:"required"`
+		ChunkSize        int64  `json:"chunk_size"`
+		Folder           string `json:"folder"`
+		Downloadable     bool   `json:"downloadable"`
+		PreserveFilename bool   `json:"preserve_filename"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请提供 filename、total_size"})
+		return
+	}
+	if body.TotalSize <= 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "文件大小无效"})
+		return
+	}
+	if body.TotalSize > maxMultipartTotalSize {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "文件超过当前站点允许的最大体积（800MB）"})
+		return
+	}
+	cs := body.ChunkSize
+	if cs <= 0 {
+		cs = defaultChunkSize
+	}
+	if cs < minChunkSize || cs > maxChunkSize {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "chunk_size 须在 1MB～32MB 之间"})
+		return
+	}
+	totalChunks := int((body.TotalSize + cs - 1) / cs)
+	if totalChunks <= 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "分片数无效"})
+		return
+	}
+
+	folder := strings.TrimSpace(body.Folder)
+	if folder != "" {
+		fc := filepath.ToSlash(filepath.Clean(folder))
+		if strings.HasPrefix(fc, "../") || strings.Contains(fc, "/../") {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "无效的目录路径"})
+			return
+		}
+	}
+
+	uploadID := bson.NewObjectID().Hex()
+	dir := chunkSessionDir(uploadID)
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建临时目录失败"})
+		return
+	}
+	meta := chunkSessionMeta{
+		SiteID:           siteID,
+		OriginalFilename: body.Filename,
+		TotalSize:        body.TotalSize,
+		ChunkSize:        cs,
+		TotalChunks:      totalChunks,
+		Folder:           folder,
+		Downloadable:     body.Downloadable,
+		PreserveFilename: body.PreserveFilename,
+		CreatedUnix:      time.Now().Unix(),
+	}
+	raw, _ := json.Marshal(meta)
+	if err := os.WriteFile(filepath.Join(dir, "meta.json"), raw, 0644); err != nil {
+		_ = os.RemoveAll(dir)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "写入会话失败"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"upload_id":     uploadID,
+		"chunk_size":    cs,
+		"total_chunks":  totalChunks,
+		"received_chunks": []int{},
+	})
+}
+
+// MultipartUploadStatus 返回已收到的分片下标（用于续传）
+func MultipartUploadStatus(c *gin.Context) {
+	siteID := c.Param("site_id")
+	uploadID := c.Param("upload_id")
+	if siteID == "" || !validUploadID(uploadID) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	meta, err := readChunkMeta(uploadID)
+	if err != nil || meta.SiteID != siteID {
+		c.JSON(http.StatusNotFound, gin.H{"error": "上传会话不存在或已过期"})
+		return
+	}
+	dir := chunkSessionDir(uploadID)
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "读取会话失败"})
+		return
+	}
+	received := make([]int, 0, meta.TotalChunks)
+	for _, e := range entries {
+		if e.IsDir() || e.Name() == "meta.json" {
+			continue
+		}
+		idx, err := strconv.Atoi(e.Name())
+		if err != nil || idx < 0 || idx >= meta.TotalChunks {
+			continue
+		}
+		info, err := e.Info()
+		if err != nil {
+			continue
+		}
+		exp := chunkExpectedSize(meta, idx)
+		if exp >= 0 && info.Size() == exp {
+			received = append(received, idx)
+		}
+	}
+	sort.Ints(received)
+	c.JSON(http.StatusOK, gin.H{
+		"upload_id":        uploadID,
+		"total_chunks":     meta.TotalChunks,
+		"total_size":       meta.TotalSize,
+		"chunk_size":       meta.ChunkSize,
+		"received_chunks":  received,
+		"original_filename": meta.OriginalFilename,
+	})
+}
+
+// PutMultipartChunk 上传单个分片（二进制 body，长度须与分片大小一致）
+func PutMultipartChunk(c *gin.Context) {
+	siteID := c.Param("site_id")
+	uploadID := c.Param("upload_id")
+	chunkStr := c.Param("chunk_index")
+	if siteID == "" || !validUploadID(uploadID) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	chunkIndex, err := strconv.Atoi(chunkStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的分片序号"})
+		return
+	}
+	meta, err := readChunkMeta(uploadID)
+	if err != nil || meta.SiteID != siteID {
+		c.JSON(http.StatusNotFound, gin.H{"error": "上传会话不存在"})
+		return
+	}
+	expected := chunkExpectedSize(meta, chunkIndex)
+	if expected < 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "分片序号越界"})
+		return
+	}
+
+	chunkFile := filepath.Join(chunkSessionDir(uploadID), strconv.Itoa(chunkIndex))
+	if fi, err := os.Stat(chunkFile); err == nil && fi.Size() == expected {
+		c.JSON(http.StatusOK, gin.H{"message": "分片已存在", "chunk_index": chunkIndex, "size": expected})
+		return
+	}
+
+	tmp := chunkFile + ".part"
+	f, err := os.Create(tmp)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建临时文件失败"})
+		return
+	}
+	n, err := io.Copy(f, io.LimitReader(c.Request.Body, expected+1))
+	_ = f.Close()
+	if err != nil {
+		_ = os.Remove(tmp)
+		c.JSON(http.StatusBadRequest, gin.H{"error": "读取分片失败"})
+		return
+	}
+	if n != expected {
+		_ = os.Remove(tmp)
+		c.JSON(http.StatusBadRequest, gin.H{"error": "分片大小不符"})
+		return
+	}
+	if err := os.Rename(tmp, chunkFile); err != nil {
+		_ = os.Remove(tmp)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "保存分片失败"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "分片已保存", "chunk_index": chunkIndex, "size": expected})
+}
+
+// CompleteMultipartUpload 合并分片并写入 site_assets
+func CompleteMultipartUpload(c *gin.Context) {
+	siteID := c.Param("site_id")
+	uploadID := c.Param("upload_id")
+	if siteID == "" || !validUploadID(uploadID) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	meta, err := readChunkMeta(uploadID)
+	if err != nil || meta.SiteID != siteID {
+		c.JSON(http.StatusNotFound, gin.H{"error": "上传会话不存在"})
+		return
+	}
+	dir := chunkSessionDir(uploadID)
+	for i := 0; i < meta.TotalChunks; i++ {
+		p := filepath.Join(dir, strconv.Itoa(i))
+		fi, err := os.Stat(p)
+		if err != nil || fi.IsDir() {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "分片未齐，无法合并", "missing_chunk": i})
+			return
+		}
+		if fi.Size() != chunkExpectedSize(meta, i) {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "分片大小异常", "chunk_index": i})
+			return
+		}
+	}
+
+	relPath, destPath, errMsg := computeSiteUploadDest(siteID, meta.Folder, meta.OriginalFilename, meta.PreserveFilename)
+	if errMsg != "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": errMsg})
+		return
+	}
+
+	if meta.PreserveFilename {
+		ctxDel, cancelDel := context.WithTimeout(c.Request.Context(), 8*time.Second)
+		defer cancelDel()
+		coll := config.GetDB(config.DBName).Collection("site_assets")
+		_, _ = coll.DeleteMany(ctxDel, bson.M{"site_id": siteID, "file_path": relPath})
+		_ = os.Remove(destPath)
+	}
+
+	baseDir := filepath.Dir(destPath)
+	if err := os.MkdirAll(baseDir, 0755); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建目录失败"})
+		return
+	}
+
+	dst, err := os.Create(destPath)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建目标文件失败"})
+		return
+	}
+	for i := 0; i < meta.TotalChunks; i++ {
+		srcPath := filepath.Join(dir, strconv.Itoa(i))
+		src, err := os.Open(srcPath)
+		if err != nil {
+			_ = dst.Close()
+			_ = os.Remove(destPath)
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "打开分片失败"})
+			return
+		}
+		_, err = io.Copy(dst, src)
+		_ = src.Close()
+		if err != nil {
+			_ = dst.Close()
+			_ = os.Remove(destPath)
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "合并分片失败"})
+			return
+		}
+	}
+	_ = dst.Close()
+
+	fi, err := os.Stat(destPath)
+	if err != nil || fi.Size() != meta.TotalSize {
+		_ = os.Remove(destPath)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "合并后大小与声明不符"})
+		return
+	}
+
+	buf := make([]byte, 512)
+	fh, err := os.Open(destPath)
+	var contentType string
+	if err == nil {
+		n, _ := fh.Read(buf)
+		_ = fh.Close()
+		contentType = http.DetectContentType(buf[:n])
+	}
+	if contentType == "" || contentType == "application/octet-stream" {
+		if x := promotionMimeType(filepath.Ext(meta.OriginalFilename)); x != "" {
+			contentType = x
+		}
+	}
+	if contentType == "" {
+		contentType = "application/octet-stream"
+	}
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 60*time.Second)
+	defer cancel()
+	res, err := config.GetDB(config.DBName).Collection("site_assets").InsertOne(ctx, bson.M{
+		"site_id":       siteID,
+		"name":          meta.OriginalFilename,
+		"file_path":     relPath,
+		"size":          meta.TotalSize,
+		"content_type":  contentType,
+		"downloadable":  meta.Downloadable,
+		"created_at":    time.Now().Format(time.RFC3339),
+	})
+	if err != nil {
+		_ = os.Remove(destPath)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	_ = os.RemoveAll(dir)
+
+	c.JSON(http.StatusOK, gin.H{"id": res.InsertedID, "file_path": relPath, "message": "上传成功"})
+	ScheduleTranscodeAfterUpload(siteID, relPath, destPath, res.InsertedID)
+}
+
+// AbortMultipartUpload 取消分片会话并删除临时文件
+func AbortMultipartUpload(c *gin.Context) {
+	siteID := c.Param("site_id")
+	uploadID := c.Param("upload_id")
+	if siteID == "" || !validUploadID(uploadID) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+	meta, err := readChunkMeta(uploadID)
+	if err != nil || meta.SiteID != siteID {
+		c.JSON(http.StatusNotFound, gin.H{"error": "会话不存在"})
+		return
+	}
+	_ = os.RemoveAll(chunkSessionDir(uploadID))
+	c.JSON(http.StatusOK, gin.H{"message": "已取消"})
+}
+
+func chunkSessionCreatedAt(uploadID string) time.Time {
+	meta, err := readChunkMeta(uploadID)
+	if err == nil && meta.CreatedUnix > 0 {
+		return time.Unix(meta.CreatedUnix, 0)
+	}
+	fi, err := os.Stat(chunkSessionDir(uploadID))
+	if err != nil {
+		return time.Time{}
+	}
+	return fi.ModTime()
+}
+
+// SweepStaleChunkUploadSessions 删除 {UPLOAD_DIR}/.chunk-uploads 下超过 staleChunkMaxAge 的会话目录
+func SweepStaleChunkUploadSessions() (removed int, err error) {
+	root := chunkSessionsRoot()
+	entries, err := os.ReadDir(root)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return 0, nil
+		}
+		return 0, err
+	}
+	maxAge, _ := loadChunkCleanupParameters()
+	now := time.Now()
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		name := e.Name()
+		if !validUploadID(name) {
+			continue
+		}
+		created := chunkSessionCreatedAt(name)
+		if created.IsZero() {
+			continue
+		}
+		if now.Sub(created) < maxAge {
+			continue
+		}
+		dir := filepath.Join(root, name)
+		if err := os.RemoveAll(dir); err != nil {
+			logger.Err("chunk_upload", "删除过期分片目录失败 %s: %v", dir, err)
+			continue
+		}
+		removed++
+	}
+	return removed, nil
+}
+
+// StartStaleChunkUploadSweep 启动后延迟执行一次，再按周期清扫非活动 .chunk-uploads
+func StartStaleChunkUploadSweep(ctx context.Context) {
+	go func() {
+		const bootDelay = 2 * time.Minute
+		t := time.NewTimer(bootDelay)
+		select {
+		case <-t.C:
+		case <-ctx.Done():
+			if !t.Stop() {
+				<-t.C
+			}
+			return
+		}
+
+		run := func() {
+			n, err := SweepStaleChunkUploadSessions()
+			if err != nil {
+				logger.Err("chunk_upload", "扫描 .chunk-uploads 失败: %v", err)
+				return
+			}
+			if n > 0 {
+				logger.Log("chunk_upload", "已删除 %d 个过期分片上传临时目录（超过后台或环境变量配置的保留时长）", n)
+			}
+		}
+		run()
+		lastSweep := time.Now()
+
+		tick := time.NewTicker(time.Minute)
+		defer tick.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-tick.C:
+				_, interval := loadChunkCleanupParameters()
+				if time.Since(lastSweep) >= interval {
+					run()
+					lastSweep = time.Now()
+				}
+			}
+		}
+	}()
+}
diff --git a/server/handlers/yuheng_cloud_register.go b/server/handlers/yuheng_cloud_register.go
new file mode 100644
index 0000000..f7812a9
--- /dev/null
+++ b/server/handlers/yuheng_cloud_register.go
@@ -0,0 +1,182 @@
+package handlers
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"yh_web/server/config"
+	"yh_web/server/models"
+
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+const yuhengCloudRegisterColl = "yuheng_cloud_register_records"
+
+func cloudRegisterURL() string {
+	u := strings.TrimSpace(os.Getenv("YH_CLOUD_REGISTER_URL"))
+	if u != "" {
+		return strings.TrimSuffix(u, "/")
+	}
+	return "http://www.cloud.yuxindazhineng.com:3001/register"
+}
+
+// YuhengCloudRegisterInput 与云端 POST /register 一致；email 仅用于调用云端，不写入 Mongo
+type YuhengCloudRegisterInput struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+	Email    string `json:"email" binding:"required"`
+}
+
+type cloudRegisterPayload struct {
+	Username string `json:"username"`
+	Password string `json:"password"`
+	Email    string `json:"email"`
+}
+
+func postCloudRegister(ctx context.Context, payload cloudRegisterPayload) (int, string, error) {
+	body, err := json.Marshal(payload)
+	if err != nil {
+		return 0, "", err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, cloudRegisterURL(), bytes.NewReader(body))
+	if err != nil {
+		return 0, "", err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	client := &http.Client{Timeout: 45 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return 0, "", err
+	}
+	defer resp.Body.Close()
+	b, _ := io.ReadAll(io.LimitReader(resp.Body, 4096))
+	return resp.StatusCode, strings.TrimSpace(string(b)), nil
+}
+
+// CreateYuhengCloudRegister 调用云端注册接口，成功后在 Mongo 写入一条记录（仅 username、password）
+func CreateYuhengCloudRegister(c *gin.Context) {
+	var in YuhengCloudRegisterInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "请填写用户名、密码与邮箱（邮箱仅提交云端）"})
+		return
+	}
+	in.Username = strings.TrimSpace(in.Username)
+	in.Password = strings.TrimSpace(in.Password)
+	in.Email = strings.TrimSpace(in.Email)
+	if in.Username == "" || in.Password == "" || in.Email == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "用户名、密码、邮箱不能为空"})
+		return
+	}
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Second)
+	defer cancel()
+
+	status, bodySnippet, err := postCloudRegister(ctx, cloudRegisterPayload{
+		Username: in.Username,
+		Password: in.Password,
+		Email:    in.Email,
+	})
+	if err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": "调用云端注册失败: " + err.Error()})
+		return
+	}
+	if status < 200 || status >= 300 {
+		msg := bodySnippet
+		if len(msg) > 500 {
+			msg = msg[:500] + "…"
+		}
+		if msg == "" {
+			msg = http.StatusText(status)
+		}
+		c.JSON(http.StatusBadGateway, gin.H{"error": fmt.Sprintf("云端返回 %d: %s", status, msg)})
+		return
+	}
+
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "数据库未连接，未写入本地记录"})
+		return
+	}
+	insCtx, insCancel := context.WithTimeout(context.Background(), 8*time.Second)
+	defer insCancel()
+	doc := bson.M{
+		"username":   in.Username,
+		"password":   in.Password,
+		"created_at": time.Now().UTC().Format(time.RFC3339),
+	}
+	res, err := db.Collection(yuhengCloudRegisterColl).InsertOne(insCtx, doc)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "云端已成功但本地记录失败: " + err.Error()})
+		return
+	}
+	idHex := ""
+	switch v := res.InsertedID.(type) {
+	case bson.ObjectID:
+		idHex = v.Hex()
+	}
+	c.JSON(http.StatusOK, gin.H{"id": idHex, "message": "已提交云端注册并写入本地记录"})
+}
+
+// ListYuhengCloudRegisterRecords 分页列出本地留痕（便于管理页展示）
+func ListYuhengCloudRegisterRecords(c *gin.Context) {
+	db := config.GetDB(config.DBName)
+	if db == nil {
+		c.JSON(http.StatusOK, gin.H{"list": []any{}, "total": 0})
+		return
+	}
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 || pageSize > 100 {
+		pageSize = 20
+	}
+	skip := int64((page - 1) * pageSize)
+	limit := int64(pageSize)
+
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 15*time.Second)
+	defer cancel()
+	coll := db.Collection(yuhengCloudRegisterColl)
+	total, err := coll.CountDocuments(ctx, bson.M{})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	opts := options.Find().SetSort(bson.D{{Key: "created_at", Value: -1}}).SetSkip(skip).SetLimit(limit)
+	cur, err := coll.Find(ctx, bson.M{}, opts)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	defer cur.Close(ctx)
+	var list []models.YuhengCloudRegisterRecord
+	for cur.Next(ctx) {
+		var row struct {
+			ID        bson.ObjectID `bson:"_id"`
+			Username  string        `bson:"username"`
+			Password  string        `bson:"password"`
+			CreatedAt string        `bson:"created_at"`
+		}
+		if err := cur.Decode(&row); err != nil {
+			continue
+		}
+		list = append(list, models.YuhengCloudRegisterRecord{
+			ID:        row.ID.Hex(),
+			Username:  row.Username,
+			Password:  row.Password,
+			CreatedAt: row.CreatedAt,
+		})
+	}
+	c.JSON(http.StatusOK, gin.H{"list": list, "total": total})
+}
diff --git a/server/main.go b/server/main.go
index 00dfa47..9d6e8dc 100644
--- a/server/main.go
+++ b/server/main.go
@@ -145,6 +145,8 @@ func main() {
 			c.JSON(http.StatusOK, structure)
 		})
 		admin.GET("/stats", handlers.GetStats)
+		admin.POST("/yuheng-cloud-accounts", handlers.RequirePermission(models.PermYuhengCloudManage), handlers.CreateYuhengCloudRegister)
+		admin.GET("/yuheng-cloud-accounts", handlers.RequirePermission(models.PermYuhengCloudManage), handlers.ListYuhengCloudRegisterRecords)
 		admin.GET("/live/moderation", handlers.RequirePermission(models.PermHomepageEdit), weblive.GetLiveModeration)
 		admin.PUT("/live/moderation/mute-all", handlers.RequirePermission(models.PermHomepageEdit), weblive.PutLiveMuteAll)
 		admin.PUT("/live/moderation/mute-ip", handlers.RequirePermission(models.PermHomepageEdit), weblive.PutLiveMuteIP)
@@ -170,6 +172,11 @@ func main() {
 		admin.GET("/sites/:site_id/assets/downloadable", handlers.RequirePermission(models.PermHomepageEdit), handlers.ListDownloadableAssets)
 		admin.GET("/sites/:site_id/assets", handlers.RequirePermission(models.PermSiteManage), handlers.ListSiteAssets)
 		admin.POST("/sites/:site_id/assets", handlers.RequirePermission(models.PermModuleUpload), handlers.UploadSiteAsset)
+		admin.POST("/sites/:site_id/assets/init-multipart", handlers.RequirePermission(models.PermModuleUpload), handlers.InitMultipartUpload)
+		admin.GET("/sites/:site_id/assets/multipart/:upload_id/status", handlers.RequirePermission(models.PermModuleUpload), handlers.MultipartUploadStatus)
+		admin.PUT("/sites/:site_id/assets/multipart/:upload_id/chunk/:chunk_index", handlers.RequirePermission(models.PermModuleUpload), handlers.PutMultipartChunk)
+		admin.POST("/sites/:site_id/assets/multipart/:upload_id/complete", handlers.RequirePermission(models.PermModuleUpload), handlers.CompleteMultipartUpload)
+		admin.DELETE("/sites/:site_id/assets/multipart/:upload_id", handlers.RequirePermission(models.PermModuleUpload), handlers.AbortMultipartUpload)
 		admin.POST("/sites/:site_id/folders", handlers.RequirePermission(models.PermModuleUpload), handlers.CreateSiteFolder)
 		admin.DELETE("/sites/:site_id/assets/:asset_id", handlers.RequirePermission(models.PermSiteManage), handlers.DeleteSiteAsset)
 		admin.GET("/sites", handlers.RequirePermission(models.PermSiteManage), handlers.GetSites)
@@ -179,6 +186,8 @@ func main() {
 		admin.DELETE("/sites/:site_id", handlers.RequirePermission(models.PermSiteManage), handlers.DeleteSite)
 		admin.GET("/system/official-site", handlers.RequirePermission(models.PermSiteManage), handlers.GetOfficialSite)
 		admin.PUT("/system/official-site", handlers.RequirePermission(models.PermSiteManage), handlers.SetOfficialSite)
+		admin.GET("/system/chunk-upload-cleanup", handlers.RequirePermission(models.PermSiteManage), handlers.GetChunkUploadCleanupConfig)
+		admin.PUT("/system/chunk-upload-cleanup", handlers.RequirePermission(models.PermSiteManage), handlers.UpdateChunkUploadCleanupConfig)
 
 		// 角色权限管理
 		admin.GET("/role-permissions", handlers.RequirePermission(models.PermRolePermission), handlers.GetRolePermissionsList)
@@ -240,6 +249,8 @@ func main() {
 
 	// 启动后扫描 uploads 下各站点 promotion 中遗留的 .mov 并补转码（与上传后异步转码逻辑一致）
 	go handlers.SweepPromotionTranscodeOnStartup()
+	// 定期删除未合并、超过保留期的分片临时目录（.chunk-uploads）
+	go handlers.StartStaleChunkUploadSweep(context.Background())
 
 	r.Run(":" + port)
 }
diff --git a/server/models/permission.go b/server/models/permission.go
index 7f4a0f0..13eaa06 100644
--- a/server/models/permission.go
+++ b/server/models/permission.go
@@ -12,6 +12,7 @@ const (
 	PermSMSConfig       = "sms_config"
 	PermPaymentConfig   = "payment_config"
 	PermRolePermission  = "role:permission" // 角色权限管理
+	PermYuhengCloudManage = "yuheng_cloud:manage" // 宇恒云账号（云端注册留痕）
 )
 
 // PermissionItem 单条权限定义（JSON 须用小写 key/name，供前端展示与勾选）
@@ -32,6 +33,7 @@ var AllPermissions = []PermissionItem{
 	{Key: PermSMSConfig, Name: "短信配置"},
 	{Key: PermPaymentConfig, Name: "支付配置"},
 	{Key: PermRolePermission, Name: "角色权限管理"},
+	{Key: PermYuhengCloudManage, Name: "宇恒云账号管理"},
 }
 
 // RolePermissionsDoc MongoDB 文档：角色 ID -> 名称与权限列表（支持自定义角色）
diff --git a/server/models/yuheng_cloud_register.go b/server/models/yuheng_cloud_register.go
new file mode 100644
index 0000000..e2a8d90
--- /dev/null
+++ b/server/models/yuheng_cloud_register.go
@@ -0,0 +1,9 @@
+package models
+
+// YuhengCloudRegisterRecord 宇恒云注册请求在本库的留痕（仅账号与密码；email 仅转发云端接口不落库）
+type YuhengCloudRegisterRecord struct {
+	ID        string `bson:"_id,omitempty" json:"id"`
+	Username  string `bson:"username" json:"username"`
+	Password  string `bson:"password" json:"password"`
+	CreatedAt string `bson:"created_at" json:"created_at"`
+}
diff --git a/server/pkg/schema/sync.go b/server/pkg/schema/sync.go
index 5053c26..8d928b3 100644
--- a/server/pkg/schema/sync.go
+++ b/server/pkg/schema/sync.go
@@ -29,6 +29,7 @@ var requiredCollections = map[string][]indexSpec{
 	"system_config":    {},
 	"role_permissions": {{Keys: bson.D{{Key: "role_id", Value: 1}}, Name: "idx_role_id", Unique: true}},
 	"site_users":       {{Keys: bson.D{{Key: "username", Value: 1}}, Name: "idx_username", Unique: true}},
+	"yuheng_cloud_register_records": {{Keys: bson.D{{Key: "created_at", Value: -1}}, Name: "idx_created_at"}},
 }
 
 type indexSpec struct {
@@ -50,6 +51,7 @@ var tableDDL = map[string]string{
 	"files": "CREATE TABLE IF NOT EXISTS \x60files\x60 (\n  \x60id\x60         VARCHAR(24)  NOT NULL COMMENT '主键',\n  \x60user_id\x60    VARCHAR(24)  NOT NULL DEFAULT '' COMMENT '用户ID',\n  \x60name\x60       VARCHAR(255) NOT NULL DEFAULT '' COMMENT '文件名',\n  \x60file_path\x60  VARCHAR(512) NOT NULL DEFAULT '' COMMENT '存储路径',\n  \x60size\x60       BIGINT       NOT NULL DEFAULT 0 COMMENT '字节数',\n  \x60created_at\x60 VARCHAR(32)  NOT NULL DEFAULT '' COMMENT '创建时间',\n  PRIMARY KEY (\x60id\x60),\n  KEY \x60idx_user_id\x60 (\x60user_id\x60)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='文件表';",
 	"system_config": "CREATE TABLE IF NOT EXISTS \x60system_config\x60 (\n  \x60id\x60        VARCHAR(64)  NOT NULL COMMENT '配置键 payment, sms_platform 等',\n  \x60payload\x60   JSON                  COMMENT '配置内容（支付/短信等）',\n  \x60updated_at\x60 VARCHAR(32) NOT NULL DEFAULT '' COMMENT '更新时间',\n  PRIMARY KEY (\x60id\x60)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='系统配置表';",
 	"site_users": "CREATE TABLE IF NOT EXISTS \x60site_users\x60 (\n  \x60id\x60            VARCHAR(24)  NOT NULL COMMENT '主键',\n  \x60username\x60      VARCHAR(64)  NOT NULL DEFAULT '' COMMENT '登录名',\n  \x60password_hash\x60 VARCHAR(128) NOT NULL DEFAULT '' COMMENT '密码哈希',\n  \x60created_at\x60    VARCHAR(32)  NOT NULL DEFAULT '' COMMENT '创建时间(UTC)',\n  PRIMARY KEY (\x60id\x60),\n  UNIQUE KEY \x60uk_username\x60 (\x60username\x60)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='前台用户(弹幕)';",
+	"yuheng_cloud_register_records": "CREATE TABLE IF NOT EXISTS \x60yuheng_cloud_register_records\x60 (\n  \x60id\x60         VARCHAR(24)  NOT NULL COMMENT '主键',\n  \x60username\x60   VARCHAR(255) NOT NULL DEFAULT '' COMMENT '账号',\n  \x60password\x60   VARCHAR(512) NOT NULL DEFAULT '' COMMENT '密码明文留痕',\n  \x60created_at\x60 VARCHAR(32)  NOT NULL DEFAULT '' COMMENT '创建时间',\n  PRIMARY KEY (\x60id\x60),\n  KEY \x60idx_created_at\x60 (\x60created_at\x60)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='宇恒云注册请求本地留痕';",
 }
 
 // CollectionInfo 线上集合信息（名称、文档数、索引）