diff --git a/backend/src/api/domain.js b/backend/src/api/domain.js
index 1df1d21..87d5444 100644
--- a/backend/src/api/domain.js
+++ b/backend/src/api/domain.js
@@ -83,6 +83,32 @@ export function applyTenantDomain(data) {
   })
 }
 
+// 绑定自有域名（提交后需按提示配置解析，再调 checkCustomDns）
+export function bindCustomDomain(data) {
+  return request({
+    url: '/backend/domain/tenant/bindCustom',
+    method: 'post',
+    data
+  })
+}
+
+// 检测自有域名解析，通过后后端自动申请 HTTPS 证书
+export function checkCustomDomainDns(id) {
+  return request({
+    url: '/backend/domain/tenant/checkCustomDns',
+    method: 'post',
+    data: { id }
+  })
+}
+
+// 获取自有域名解析配置指引（CNAME 目标 / A 记录 IP）
+export function getCustomDomainGuide() {
+  return request({
+    url: '/backend/domain/tenant/customDomainGuide',
+    method: 'get'
+  })
+}
+
 // 审核租户域名
 export function auditTenantDomain(data) {
   return request({
diff --git a/backend/src/views/apps/cms/domain/audit.vue b/backend/src/views/apps/cms/domain/audit.vue
index b43b1a9..970b897 100644
--- a/backend/src/views/apps/cms/domain/audit.vue
+++ b/backend/src/views/apps/cms/domain/audit.vue
@@ -14,13 +14,17 @@
     <div class="search-box">
       <el-input
         v-model="searchForm.sub_domain"
-        placeholder="搜索二级域名"
+        placeholder="搜索二级前缀或完整域名"
         clearable
-        style="width: 200px; margin-right: 10px;"
+        style="width: 220px; margin-right: 10px;"
         @keyup.enter="handleSearch"
       />
+      <el-select v-model="searchForm.domain_type" placeholder="类型" clearable style="width: 150px; margin-right: 10px;">
+        <el-option label="平台二级域名" :value="1" />
+        <el-option label="自有域名" :value="2" />
+      </el-select>
       <el-select v-model="searchForm.status" placeholder="状态" clearable style="width: 120px; margin-right: 10px;">
-        <el-option label="审核中" :value="0" />
+        <el-option label="待生效/审核中" :value="0" />
         <el-option label="已生效" :value="1" />
         <el-option label="已禁用" :value="2" />
       </el-select>
@@ -37,20 +41,63 @@
     >
       <el-table-column type="index" label="序号" width="60" align="center" />
       <el-table-column prop="tenant_name" label="租户名称" min-width="150" />
-      <el-table-column prop="sub_domain" label="二级域名前缀" width="150" />
-      <el-table-column prop="main_domain" label="主域名" min-width="150" />
-      <el-table-column prop="full_domain" label="完整域名" min-width="200" />
-      <el-table-column prop="status" label="状态" width="100" align="center">
+      <el-table-column label="类型" width="130" align="center">
         <template #default="scope">
-          <el-tag v-if="scope.row.status === 0" type="warning">审核中</el-tag>
-          <el-tag v-else-if="scope.row.status === 1" type="success">已生效</el-tag>
-          <el-tag v-else type="danger">已禁用</el-tag>
+          <el-tag v-if="isCustom(scope.row)" type="warning">自有域名</el-tag>
+          <el-tag v-else type="info">平台二级域名</el-tag>
         </template>
       </el-table-column>
-      <el-table-column prop="create_time" label="申请时间" width="180" />
-      <el-table-column label="操作" width="200" fixed="right" align="center">
+      <el-table-column prop="full_domain" label="完整域名" min-width="200" />
+      <el-table-column prop="status" label="状态" width="120" align="center">
         <template #default="scope">
-          <template v-if="scope.row.status === 0">
+          <el-tag v-if="scope.row.status === 1" type="success">已生效</el-tag>
+          <el-tag v-else-if="scope.row.status === 2" type="danger">已禁用</el-tag>
+          <el-tag v-else type="warning">{{ isCustom(scope.row) ? '待生效' : '审核中' }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="解析检测" width="120" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">—</span>
+          <el-tooltip v-else-if="scope.row.verify_msg" :content="scope.row.verify_msg" placement="top">
+            <el-tag :type="verifyTagType(scope.row.verify_status)">{{ verifyText(scope.row.verify_status) }}</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="verifyTagType(scope.row.verify_status)">{{ verifyText(scope.row.verify_status) }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="HTTPS 证书" width="130" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">平台证书</span>
+          <el-tooltip v-else-if="scope.row.ssl_status === 3 && scope.row.ssl_error" :content="scope.row.ssl_error" placement="top">
+            <el-tag type="danger">签发失败</el-tag>
+          </el-tooltip>
+          <el-tooltip v-else-if="scope.row.ssl_status === 2 && scope.row.ssl_expire_at" :content="'到期时间：' + scope.row.ssl_expire_at" placement="top">
+            <el-tag type="success">已签发</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="sslTagType(scope.row.ssl_status)">{{ sslText(scope.row.ssl_status) }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="create_time" label="申请时间" width="170" />
+      <el-table-column label="操作" width="230" fixed="right" align="center">
+        <template #default="scope">
+          <!-- 自有域名无人工审核：解析与证书就绪后自动生效，这里只提供重新检测与禁用 -->
+          <template v-if="isCustom(scope.row)">
+            <el-button
+              size="small"
+              text
+              type="primary"
+              :loading="checkingId === scope.row.id"
+              @click="handleCheckDns(scope.row)"
+            >
+              检测解析
+            </el-button>
+            <el-button v-if="scope.row.status === 1" size="small" text type="danger" @click="handleDisable(scope.row)">
+              禁用
+            </el-button>
+            <el-button v-else-if="scope.row.status === 2" size="small" text type="success" @click="handleEnable(scope.row)">
+              启用
+            </el-button>
+          </template>
+          <template v-else-if="scope.row.status === 0">
             <el-button size="small" type="success" @click="handleAudit(scope.row, 'approve')">
               通过
             </el-button>
@@ -87,13 +134,23 @@
 import { ref, reactive, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { Refresh } from '@element-plus/icons-vue'
-import { getTenantDomainList, auditTenantDomain, toggleTenantDomainStatus } from '@/api/domain'
+import {
+  getTenantDomainList,
+  auditTenantDomain,
+  toggleTenantDomainStatus,
+  checkCustomDomainDns
+} from '@/api/domain'
+
+// 域名类型：与后端 models.DomainTypeCustom 对应
+const DOMAIN_TYPE_CUSTOM = 2
 
 const loading = ref(false)
+const checkingId = ref<number | null>(null)
 
 const searchForm = reactive({
   sub_domain: '',
-  status: ''
+  status: '',
+  domain_type: ''
 })
 
 const pagination = reactive({
@@ -104,6 +161,20 @@ const pagination = reactive({
 
 const tableData = ref<any[]>([])
 
+const isCustom = (row: any) => row.domain_type === DOMAIN_TYPE_CUSTOM
+
+const verifyText = (status: number) =>
+  status === 1 ? '已通过' : status === 2 ? '未通过' : '未检测'
+
+const verifyTagType = (status: number) =>
+  status === 1 ? 'success' : status === 2 ? 'danger' : 'info'
+
+const sslText = (status: number) =>
+  status === 2 ? '已签发' : status === 1 ? '签发中' : status === 3 ? '签发失败' : '待处理'
+
+const sslTagType = (status: number) =>
+  status === 2 ? 'success' : status === 1 ? 'warning' : status === 3 ? 'danger' : 'info'
+
 const fetchData = async () => {
   loading.value = true
   try {
@@ -129,7 +200,7 @@ const handleSearch = () => {
 const handleAudit = async (row: any, action: string) => {
   const msg = action === 'approve' ? '确定要通过该域名申请吗？' : '确定要拒绝该域名申请吗？'
   await ElMessageBox.confirm(msg, '提示', { type: 'warning' })
-  
+
   const res = await auditTenantDomain({ id: row.id, action })
   if (res.code === 200) {
     ElMessage.success(res.msg)
@@ -140,8 +211,8 @@ const handleAudit = async (row: any, action: string) => {
 }
 
 const handleDisable = async (row: any) => {
-  await ElMessageBox.confirm('确定要禁用该域名吗？', '提示', { type: 'warning' })
-  
+  await ElMessageBox.confirm('确定要禁用该域名吗？禁用后该域名将无法访问官网。', '提示', { type: 'warning' })
+
   const res = await toggleTenantDomainStatus(row.id)
   if (res.code === 200) {
     ElMessage.success(res.msg)
@@ -151,6 +222,39 @@ const handleDisable = async (row: any) => {
   }
 }
 
+const handleEnable = async (row: any) => {
+  await ElMessageBox.confirm('确定要重新启用该域名吗？', '提示', { type: 'warning' })
+
+  const res = await toggleTenantDomainStatus(row.id)
+  if (res.code === 200) {
+    ElMessage.success(res.msg)
+    fetchData()
+  } else {
+    ElMessage.error(res.msg || '操作失败')
+  }
+}
+
+// 自有域名：重新检测解析，通过后后端自动申请证书
+const handleCheckDns = async (row: any) => {
+  checkingId.value = row.id
+  try {
+    const res = await checkCustomDomainDns(row.id)
+    if (res.code === 200) {
+      const data = res.data || {}
+      if (data.verify_status === 1) {
+        ElMessage.success(data.ssl_message || data.verify_msg || '解析检测通过')
+      } else {
+        ElMessage.warning(data.verify_msg || '解析尚未生效')
+      }
+      fetchData()
+    } else {
+      ElMessage.error(res.msg || '检测失败')
+    }
+  } finally {
+    checkingId.value = null
+  }
+}
+
 onMounted(() => {
   fetchData()
 })
@@ -177,6 +281,10 @@ onMounted(() => {
   margin-bottom: 20px;
 }
 
+.text-muted {
+  color: #999;
+}
+
 .pagination-wrap {
   margin-top: 20px;
   display: flex;
diff --git a/backend/src/views/basicSettings/tenants/domain.vue b/backend/src/views/basicSettings/tenants/domain.vue
index 43d259a..c16d340 100644
--- a/backend/src/views/basicSettings/tenants/domain.vue
+++ b/backend/src/views/basicSettings/tenants/domain.vue
@@ -2,10 +2,16 @@
   <div class="container-box">
     <div class="header-bar">
       <h2>我的域名</h2>
-      <el-button type="primary" @click="dialogVisible = true">
-        <el-icon><Plus /></el-icon>
-        申请二级域名
-      </el-button>
+      <div class="header-actions">
+        <el-button type="primary" @click="applyDialogVisible = true">
+          <el-icon><Plus /></el-icon>
+          申请二级域名
+        </el-button>
+        <el-button type="success" @click="openBindDialog">
+          <el-icon><Link /></el-icon>
+          绑定自有域名
+        </el-button>
+      </div>
     </div>
 
     <el-divider></el-divider>
@@ -19,36 +25,89 @@
       element-loading-text="正在加载..."
     >
       <el-table-column type="index" label="序号" width="60" align="center" />
-      <el-table-column prop="sub_domain" label="二级域名前缀" width="150" />
-      <el-table-column prop="main_domain" label="主域名" min-width="150" />
-      <el-table-column prop="full_domain" label="完整域名" min-width="200">
+      <el-table-column label="类型" width="130" align="center">
+        <template #default="scope">
+          <el-tag v-if="isCustom(scope.row)" type="warning">自有域名</el-tag>
+          <el-tag v-else type="info">平台二级域名</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="full_domain" label="完整域名" min-width="220">
         <template #default="scope">
           <el-link
             type="primary"
-            :href="'http://' + scope.row.full_domain"
+            :href="domainUrl(scope.row)"
             target="_blank"
           >
             {{ scope.row.full_domain }}
           </el-link>
         </template>
       </el-table-column>
-      <el-table-column prop="status" label="状态" width="100" align="center">
+      <el-table-column prop="status" label="状态" width="110" align="center">
         <template #default="scope">
-          <el-tag v-if="scope.row.status === 0" type="warning">审核中</el-tag>
-          <el-tag v-else-if="scope.row.status === 1" type="success"
-            >已生效</el-tag
-          >
-          <el-tag v-else type="danger">已禁用</el-tag>
+          <el-tag v-if="scope.row.status === 1" type="success">已生效</el-tag>
+          <el-tag v-else-if="scope.row.status === 2" type="danger">已禁用</el-tag>
+          <el-tag v-else type="warning">{{
+            isCustom(scope.row) ? "待生效" : "审核中"
+          }}</el-tag>
         </template>
       </el-table-column>
-      <el-table-column prop="create_time" label="申请时间" width="180" />
-      <el-table-column label="操作" width="180" fixed="right" align="center">
+      <el-table-column label="解析检测" width="120" align="center">
         <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">—</span>
+          <el-tooltip
+            v-else-if="scope.row.verify_msg"
+            :content="scope.row.verify_msg"
+            placement="top"
+          >
+            <el-tag :type="verifyTagType(scope.row.verify_status)">
+              {{ verifyText(scope.row.verify_status) }}
+            </el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="verifyTagType(scope.row.verify_status)">
+            {{ verifyText(scope.row.verify_status) }}
+          </el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="HTTPS 证书" width="130" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">平台证书</span>
+          <el-tooltip
+            v-else-if="scope.row.ssl_status === 3 && scope.row.ssl_error"
+            :content="scope.row.ssl_error"
+            placement="top"
+          >
+            <el-tag type="danger">签发失败</el-tag>
+          </el-tooltip>
+          <el-tooltip
+            v-else-if="scope.row.ssl_status === 2 && scope.row.ssl_expire_at"
+            :content="'到期时间：' + scope.row.ssl_expire_at"
+            placement="top"
+          >
+            <el-tag type="success">已签发</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="sslTagType(scope.row.ssl_status)">
+            {{ sslText(scope.row.ssl_status) }}
+          </el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="create_time" label="申请时间" width="170" />
+      <el-table-column label="操作" width="230" fixed="right" align="center">
+        <template #default="scope">
+          <el-button
+            v-if="isCustom(scope.row)"
+            size="small"
+            text
+            type="primary"
+            :loading="checkingId === scope.row.id"
+            @click="handleCheckDns(scope.row)"
+          >
+            检测解析
+          </el-button>
           <el-button
             size="small"
             text
             type="primary"
-            @click="handleCopy(scope.row.full_domain)"
+            @click="handleCopy(scope.row)"
           >
             复制
           </el-button>
@@ -63,13 +122,21 @@
         </template>
       </el-table-column>
     </el-table>
-
-    <!-- 申请域名弹窗 -->
-    <el-dialog v-model="dialogVisible" title="申请二级域名" width="500px">
-      <el-form :model="form" :rules="rules" ref="formRef" label-width="100px">
+    <!-- 申请二级域名弹窗 -->
+    <el-dialog
+      v-model="applyDialogVisible"
+      title="申请二级域名"
+      width="500px"
+    >
+      <el-form
+        :model="applyForm"
+        :rules="applyRules"
+        ref="applyFormRef"
+        label-width="100px"
+      >
         <el-form-item label="选择主域名" prop="main_domain">
           <el-select
-            v-model="form.main_domain"
+            v-model="applyForm.main_domain"
             placeholder="请选择主域名"
             style="width: 100%"
           >
@@ -82,9 +149,12 @@
           </el-select>
         </el-form-item>
         <el-form-item label="二级前缀" prop="sub_domain">
-          <el-input v-model="form.sub_domain" placeholder="请输入二级域名前缀">
+          <el-input
+            v-model="applyForm.sub_domain"
+            placeholder="请输入二级域名前缀"
+          >
             <template #append>{{
-              form.main_domain ? "." + form.main_domain : ""
+              applyForm.main_domain ? "." + applyForm.main_domain : ""
             }}</template>
           </el-input>
           <div class="form-tip">
@@ -94,50 +164,120 @@
         <el-form-item label="预览">
           <div class="domain-preview">
             {{
-              form.sub_domain
-                ? form.sub_domain + "." + (form.main_domain || "example.com")
+              applyForm.sub_domain
+                ? applyForm.sub_domain +
+                  "." +
+                  (applyForm.main_domain || "example.com")
                 : "请填写上方信息"
             }}
           </div>
         </el-form-item>
       </el-form>
       <template #footer>
-        <el-button @click="dialogVisible = false">取消</el-button>
-        <el-button type="primary" @click="handleSubmit" :loading="submitLoading"
+        <el-button @click="applyDialogVisible = false">取消</el-button>
+        <el-button
+          type="primary"
+          @click="handleApplySubmit"
+          :loading="applyLoading"
           >提交申请</el-button
         >
       </template>
     </el-dialog>
+
+    <!-- 绑定自有域名弹窗 -->
+    <el-dialog v-model="bindDialogVisible" title="绑定自有域名" width="620px">
+      <el-form
+        :model="bindForm"
+        :rules="bindRules"
+        ref="bindFormRef"
+        label-width="90px"
+      >
+        <el-form-item label="域名" prop="domain">
+          <el-input
+            v-model="bindForm.domain"
+            placeholder="请输入完整域名，如 www.example.com"
+          />
+          <div class="form-tip">
+            不要带 http:// 与路径。根域名（example.com）与 www
+            视为两个域名，需分别绑定。
+          </div>
+        </el-form-item>
+      </el-form>
+
+      <el-alert type="info" :closable="false" class="guide-box">
+        <template #title>绑定后请到域名服务商处添加解析</template>
+        <div v-if="guide.configured" class="guide-body">
+          <p v-if="guide.cname_target">
+            <strong>子域名（如 www）</strong>：添加 CNAME 记录，记录值
+            <code>{{ guide.cname_target }}</code>
+          </p>
+          <p v-if="guide.a_ips && guide.a_ips.length">
+            <strong>根域名（如 example.com）</strong>：添加 A 记录，记录值
+            <code>{{ guide.a_ips.join(" 或 ") }}</code>
+          </p>
+          <p class="guide-note">
+            解析生效后回到本页点击「检测解析」，系统会自动申请 HTTPS
+            证书，签发成功后域名即生效。
+          </p>
+        </div>
+        <div v-else class="guide-body">
+          平台尚未配置解析目标，请联系平台管理员补全后再绑定。
+        </div>
+      </el-alert>
+
+      <template #footer>
+        <el-button @click="bindDialogVisible = false">取消</el-button>
+        <el-button type="primary" @click="handleBindSubmit" :loading="bindLoading"
+          >确认绑定</el-button
+        >
+      </template>
+    </el-dialog>
   </div>
 </template>
-
 <script lang="ts" setup>
 import { ref, reactive, onMounted } from "vue";
 import { ElMessage, ElMessageBox } from "element-plus";
-import { Plus } from "@element-plus/icons-vue";
+import { Plus, Link } from "@element-plus/icons-vue";
 import {
   getMyDomains,
   applyTenantDomain,
   getEnabledDomains,
   deleteTenantDomain,
+  bindCustomDomain,
+  checkCustomDomainDns,
+  getCustomDomainGuide,
 } from "@/api/domain";
-import { useAuthStore } from "@/stores/auth";
 
-const authStore = useAuthStore();
+// 域名类型：与后端 models.DomainTypeCustom 对应
+const DOMAIN_TYPE_CUSTOM = 2;
+
 const loading = ref(false);
-const submitLoading = ref(false);
-const dialogVisible = ref(false);
-const formRef = ref();
+const applyLoading = ref(false);
+const bindLoading = ref(false);
+const checkingId = ref<number | null>(null);
+const applyDialogVisible = ref(false);
+const bindDialogVisible = ref(false);
+const applyFormRef = ref();
+const bindFormRef = ref();
 
 const tableData = ref<any[]>([]);
 const domainList = ref<any[]>([]);
+const guide = reactive<{
+  cname_target: string;
+  a_ips: string[];
+  configured: boolean;
+}>({ cname_target: "", a_ips: [], configured: false });
 
-const form = reactive({
+const applyForm = reactive({
   main_domain: "",
   sub_domain: "",
 });
 
-const rules = {
+const bindForm = reactive({
+  domain: "",
+});
+
+const applyRules = {
   main_domain: [{ required: true, message: "请选择主域名", trigger: "change" }],
   sub_domain: [
     { required: true, message: "请输入二级域名前缀", trigger: "blur" },
@@ -149,16 +289,58 @@ const rules = {
   ],
 };
 
+const bindRules = {
+  domain: [
+    { required: true, message: "请输入要绑定的域名", trigger: "blur" },
+    {
+      pattern: /^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/,
+      message: "请输入合法的完整域名，如 www.example.com",
+      trigger: "blur",
+    },
+  ],
+};
+
+const isCustom = (row: any) => row.domain_type === DOMAIN_TYPE_CUSTOM;
+
+// 已签发证书的自有域名用 https 打开，其余用 http 避免证书告警
+const domainUrl = (row: any) => {
+  const scheme = !isCustom(row) || row.ssl_status === 2 ? "https" : "http";
+  return `${scheme}://${row.full_domain}`;
+};
+
+const verifyText = (status: number) =>
+  status === 1 ? "已通过" : status === 2 ? "未通过" : "未检测";
+
+const verifyTagType = (status: number) =>
+  status === 1 ? "success" : status === 2 ? "danger" : "info";
+
+const sslText = (status: number) =>
+  status === 2
+    ? "已签发"
+    : status === 1
+    ? "签发中"
+    : status === 3
+    ? "签发失败"
+    : "待处理";
+
+const sslTagType = (status: number) =>
+  status === 2
+    ? "success"
+    : status === 1
+    ? "warning"
+    : status === 3
+    ? "danger"
+    : "info";
+
 const fetchDomains = async () => {
   loading.value = true;
   try {
-    // 获取我的域名列表
-    const res = await getMyDomains({ tid: authStore.user.tid });
+    // 我的域名列表：租户 ID 由后端从登录态取，前端不再传 tid
+    const res = await getMyDomains();
     if (res.code === 200) {
       tableData.value = res.data || [];
     }
 
-    // 获取可选主域名
     const domainRes = await getEnabledDomains();
     if (domainRes.code === 200) {
       domainList.value = domainRes.data || [];
@@ -168,37 +350,92 @@ const fetchDomains = async () => {
   }
 };
 
-const handleSubmit = async () => {
-  await formRef.value.validate();
-  submitLoading.value = true;
+const fetchGuide = async () => {
+  const res = await getCustomDomainGuide();
+  if (res.code === 200 && res.data) {
+    guide.cname_target = res.data.cname_target || "";
+    guide.a_ips = res.data.a_ips || [];
+    guide.configured = !!res.data.configured;
+  }
+};
+
+const openBindDialog = async () => {
+  bindForm.domain = "";
+  bindDialogVisible.value = true;
+  await fetchGuide();
+};
+
+const handleApplySubmit = async () => {
+  await applyFormRef.value.validate();
+  applyLoading.value = true;
   try {
     const res = await applyTenantDomain({
-      tid: authStore.user.tid,
-      main_domain: form.main_domain,
-      sub_domain: form.sub_domain,
+      main_domain: applyForm.main_domain,
+      sub_domain: applyForm.sub_domain,
     });
     if (res.code === 200) {
       ElMessage.success(res.msg);
-      dialogVisible.value = false;
-      form.sub_domain = "";
+      applyDialogVisible.value = false;
+      applyForm.sub_domain = "";
       fetchDomains();
     } else {
       ElMessage.error(res.msg || "申请失败");
     }
   } finally {
-    submitLoading.value = false;
+    applyLoading.value = false;
   }
 };
 
-const handleCopy = (domain: string) => {
-  navigator.clipboard.writeText("http://" + domain);
+const handleBindSubmit = async () => {
+  await bindFormRef.value.validate();
+  bindLoading.value = true;
+  try {
+    const res = await bindCustomDomain({ domain: bindForm.domain });
+    if (res.code === 200) {
+      ElMessage.success(res.msg || "绑定成功");
+      bindDialogVisible.value = false;
+      bindForm.domain = "";
+      fetchDomains();
+    } else {
+      ElMessage.error(res.msg || "绑定失败");
+    }
+  } finally {
+    bindLoading.value = false;
+  }
+};
+
+const handleCheckDns = async (row: any) => {
+  checkingId.value = row.id;
+  try {
+    const res = await checkCustomDomainDns(row.id);
+    if (res.code === 200) {
+      const data = res.data || {};
+      if (data.verify_status === 1) {
+        ElMessage.success(data.ssl_message || data.verify_msg || "解析检测通过");
+      } else {
+        ElMessage.warning(data.verify_msg || "解析尚未生效，请稍后重试");
+      }
+      fetchDomains();
+    } else {
+      ElMessage.error(res.msg || "检测失败");
+    }
+  } finally {
+    checkingId.value = null;
+  }
+};
+
+const handleCopy = (row: any) => {
+  navigator.clipboard.writeText(domainUrl(row));
   ElMessage.success("链接已复制到剪贴板");
 };
 
 const handleDelete = async (row: any) => {
   try {
+    const extra = isCustom(row)
+      ? "删除后该域名将无法访问，已签发的证书也不再续期。"
+      : "";
     await ElMessageBox.confirm(
-      `确定要删除域名 "${row.full_domain}" 吗？`,
+      `确定要删除域名 "${row.full_domain}" 吗？${extra}`,
       "提示",
       {
         confirmButtonText: "确定",
@@ -222,6 +459,7 @@ const handleDelete = async (row: any) => {
 
 onMounted(() => {
   fetchDomains();
+  fetchGuide();
 });
 </script>
 
@@ -242,10 +480,16 @@ onMounted(() => {
   }
 }
 
+.header-actions {
+  display: flex;
+  gap: 10px;
+}
+
 .form-tip {
   font-size: 12px;
   color: #999;
   margin-top: 5px;
+  line-height: 1.6;
 }
 
 .domain-preview {
@@ -255,4 +499,34 @@ onMounted(() => {
   font-size: 14px;
   color: #409eff;
 }
+
+.text-muted {
+  color: #999;
+}
+
+.guide-box {
+  margin-top: 4px;
+}
+
+.guide-body {
+  font-size: 13px;
+  line-height: 1.9;
+
+  p {
+    margin: 0;
+  }
+
+  code {
+    padding: 1px 6px;
+    background: #fff;
+    border: 1px solid #dcdfe6;
+    border-radius: 3px;
+    color: #409eff;
+  }
+}
+
+.guide-note {
+  color: #909399;
+}
 </style>
+
diff --git a/docs/关于租户官网服务器端nginx的配置.md b/docs/关于租户官网服务器端nginx的配置.md
index d5dfd41..076c32f 100644
--- a/docs/关于租户官网服务器端nginx的配置.md
+++ b/docs/关于租户官网服务器端nginx的配置.md
@@ -461,7 +461,154 @@ server {
 
 ---
 
-## 五、重要注意事项
+## 五、租户自有域名（扑底站点 + 自动 HTTPS）
+
+> 前面两节的站点只匹配 `yunzer.com.cn` / `*.yunzer.com.cn` / `dh2.fun` / `*.dh2.fun`。租户绑定自己的域名（如 `www.客户公司.com`）后，解析过来会落到 nginx 的默认站点，命中不了上面的任何 `server_name`。本节的扑底站点解决两件事：**让未知域名也能进 Go**，以及**为这些域名提供 HTTPS 证书**。
+
+### 5.1 工作流程
+
+1. 租户在后台「我的域名」点「绑定自有域名」，填写完整域名；
+2. 系统返回 CNAME 目标 / A 记录 IP（来自 `app.conf` 的 `customdomain_cname_target`、`customdomain_a_ips`）；
+3. 租户到域名服务商添加解析，回来点「检测解析」；
+4. Go 用 `net.LookupCNAME` / `net.LookupHost` 校验解析是否指向平台；
+5. 校验通过后 Go 异步向 Let's Encrypt 发起 HTTP-01 申请，CA 回访 `http://域名/.well-known/acme-challenge/<token>`；
+6. nginx 扑底站点把该路径**明文**反代给 Go，Go 应答 token；
+7. 签发成功后证书写入 `{ssl_cert_dir}/{域名}/fullchain.pem` 与 `privkey.pem`，记录置 `ssl_status=2`、`status=1`，域名生效；
+8. 每 12 小时扫一次，到期前 30 天自动续期。
+
+### 5.2 app.conf 需要填的五项
+
+```ini
+# 租户子域名 CNAME 到这个主机名（该主机名需已 A 记录指向本服务器）
+customdomain_cname_target = sites.yunzer.com.cn
+
+# 根域名只能用 A 记录，这里写本服务器公网 IP（多个用英文逗号分隔）
+customdomain_a_ips = 1.2.3.4
+
+# Let's Encrypt 账号邮箱
+acme_email = ops@yunzer.com.cn
+
+# 留空使用正式环境；联调先填 staging，避免打满正式环境频控
+# acme_directory = https://acme-staging-v02.api.letsencrypt.org/directory
+acme_directory =
+
+# 证书落盘目录，Go 进程必须可写，nginx 必须可读
+ssl_cert_dir = /www/wwwroot/ssl-certs
+```
+
+`customdomain_cname_target` 建议单独用一个平台子域（如 `sites.yunzer.com.cn`），指向服务器 IP。以后换服务器只改这条 A 记录，所有租户的 CNAME 都跟着走，不用逐个通知租户改解析。
+
+### 5.3 扑底站点配置
+
+新建一个宝塔站点（域名可随便填一个不用的，例如 `custom-domains.local`），或直接在任一站点配置文件里追加下面内容。**注意 upstream 名字不能与 `go_backend_dh2` / `go_backend_yunzer` 重复。**
+
+```nginx
+upstream go_backend_custom {
+    server 127.0.0.1:8081;
+}
+
+# SNI 决定用哪个域名的证书目录；无 SNI 的请求回落到 _default
+map $ssl_server_name $cert_host {
+    ""      _default;
+    default $ssl_server_name;
+}
+
+# ---------- HTTP：只负责 ACME 验证与明文访问，不做整站跳转 ----------
+server {
+    listen 80 default_server;
+    server_name _;
+
+    # 关键：ACME 验证不能 301 到 HTTPS。首次签发时还没有证书，
+    # 跳过去 CA 会因为证书不可信而验证失败。
+    location /.well-known/acme-challenge/ {
+        proxy_pass http://go_backend_custom;
+        proxy_set_header Host $host;
+    }
+
+    location / {
+        proxy_pass http://go_backend_custom;
+        proxy_set_header Host $host;
+        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 $scheme;
+    }
+
+    access_log  /www/wwwlogs/custom-domain.log;
+    error_log   /www/wwwlogs/custom-domain.error.log;
+}
+
+# ---------- HTTPS：按 SNI 从证书目录取对应域名的证书 ----------
+server {
+    listen 443 ssl default_server;
+    http2 on;
+    server_name _;
+
+    ssl_certificate     /www/wwwroot/ssl-certs/$cert_host/fullchain.pem;
+    ssl_certificate_key /www/wwwroot/ssl-certs/$cert_host/privkey.pem;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_session_cache shared:SSL:10m;
+    ssl_session_timeout 10m;
+
+    # 这里不要加 HSTS：证书是自动签的，一旦某个域名签发失败又被浏览器记住 HSTS，
+    # 租户连 HTTP 兜底访问都用不了。
+
+    location / {
+        proxy_pass http://go_backend_custom;
+        proxy_set_header Host $host;
+        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;
+    }
+
+    access_log  /www/wwwlogs/custom-domain.ssl.log;
+    error_log   /www/wwwlogs/custom-domain.ssl.error.log;
+}
+```
+
+### 5.4 上线前必做的四件事
+
+1. **放一份 `_default` 兜底证书**。`ssl_certificate` 用了变量，nginx 启动时不校验文件是否存在，但握手时找不到文件会直接失败。没有 SNI 的客户端（老设备、直接用 IP 访问）会落到 `_default`：
+
+   ```bash
+   mkdir -p /www/wwwroot/ssl-certs/_default
+   openssl req -x509 -nodes -days 3650 -newkey rsa:2048 \
+     -keyout /www/wwwroot/ssl-certs/_default/privkey.pem \
+     -out   /www/wwwroot/ssl-certs/_default/fullchain.pem \
+     -subj "/CN=invalid"
+   ```
+
+2. **nginx 版本 ≥ 1.15.9**。`ssl_certificate` 支持变量是从这个版本开始的，宝塔默认的 1.2x 都满足。低版本会报 `invalid number of arguments` 或直接不生效。
+
+3. **证书目录权限**。Go 进程要能创建子目录与写文件，nginx 要能读：
+
+   ```bash
+   mkdir -p /www/wwwroot/ssl-certs
+   chown -R <go进程用户>:www /www/wwwroot/ssl-certs
+   chmod 755 /www/wwwroot/ssl-certs
+   ```
+
+4. **公网 80 与 443 都要可达**。HTTP-01 验证走 80 端口，被防火墙或安全组挡住会签发失败。
+
+### 5.5 default_server 的影响范围
+
+`listen 80 default_server` 会把「所有没匹配到具体 server_name 的请求」都吃掉。原来这类请求落到宝塔默认站点（通常是一个空白页或宝塔欢迎页）。如果服务器上还有其他靠默认站点兜底的业务，先确认它们都有精确的 `server_name`，否则会被这个扑底站点抢走。nginx 的匹配优先级是：精确 `server_name` > 前导通配 > 尾随通配 > 正则 > `default_server`，前面两节的配置都是精确匹配或正则，不受影响。
+
+### 5.6 排查
+
+| 现象 | 原因 | 处理 |
+|---|---|---|
+| 「解析检测」提示当前解析到别的 IP | 解析没生效或填错 | 等 TTL 过期；`dig +short 域名` 核对 |
+| 「解析检测」提示平台尚未配置解析目标 | `app.conf` 两项为空 | 填 `customdomain_cname_target` / `customdomain_a_ips` 后重启 Go |
+| 证书状态一直「签发中」 | CA 回访拿不到 token | `curl http://域名/.well-known/acme-challenge/test` 应到 Go 而非 301 |
+| 证书「签发失败」，原因含 403/404 | 80 端口不可达或被 HTTPS 跳转拦了 | 检查安全组、确认 challenge 的 location 在跳转规则之前 |
+| 浏览器提示证书名称不匹配 | 落到了 `_default` 自签证书 | 说明 SNI 对应目录没有证书，看该域名的 `ssl_status` 与 `ssl_error` |
+| 签发失败后短时间点不动 | 失败冷却 30 分钟 | 等冷却结束再点，或先用 staging 联调 |
+
+> 签发失败原因会写进 `yz_system_tenant_domain.ssl_error`，前端「证书」列悬浮即可看到。Let's Encrypt 对同一账号每小时失败次数有限制，所以代码里加了 30 分钟冷却，避免租户反复点击把额度打满。
+
+---
+
+## 六、重要注意事项
 
 1. **子域名必须用泛域名证书**。租户域名是二级域名（`ceshi.yunzer.com.cn`），单域名证书会导致 HTTPS 证书错误。需在宝塔为 `*.yunzer.com.cn`、`*.dh2.fun` 申请泛域名证书（DNS 验证），并替换配置中的证书路径。
 2. **upstream 不能重名**。两个站点配置都在同一 http 上下文，本文分别用 `go_backend_dh2`、`go_backend_yunzer`；重名会 `duplicate upstream` 启动失败。
@@ -480,9 +627,9 @@ server {
 
 ---
 
-## 六、验证与排查
+## 七、验证与排查
 
-### 6.1 部署后验证顺序
+### 7.1 部署后验证顺序
 
 ```bash
 # 1. 绕过 nginx 直接验证 Go（在服务器上执行）
@@ -494,10 +641,16 @@ curl -k -H "Host: ceshi.yunzer.com.cn" https://127.0.0.1/
 # 3. 验证七牛代理：应返回图片内容或 200/304，而不是 Go 的 404 页面
 curl -I https://yunzer.com.cn/qiniu/2026/06/02/1780371759517804300.png
 
-# 4. 浏览器访问 https://ceshi.yunzer.com.cn
+# 4. 自有域名：先确认扑底站点能把 challenge 明文送到 Go（不应返回 301）
+curl -i -H "Host: 待绑域名" http://127.0.0.1/.well-known/acme-challenge/probe
+
+# 5. 自有域名：确认 Go 能按 Host 命中租户
+curl -H "Host: 待绑域名" http://127.0.0.1:8081/
+
+# 6. 浏览器访问 https://ceshi.yunzer.com.cn
 ```
 
-### 6.2 常见现象对照表
+### 7.2 常见现象对照表
 
 | 现象 | 原因 | 处理 |
 |---|---|---|
@@ -510,18 +663,18 @@ curl -I https://yunzer.com.cn/qiniu/2026/06/02/1780371759517804300.png
 
 ---
 
-## 七、迁移服务器清单（以迁移到 192.168.1.101 为例）
+## 八、迁移服务器清单（以迁移到 192.168.1.101 为例）
 
 1. **新机器部署 Go**：复制 `go/` 目录（含 `themes/`、`conf/app.conf`），修改 `app.conf` 数据库连接为新库地址，启动服务；
-2. **新库初始化**：导入业务数据，执行 `sql/` 下全部建表/变更 SQL（尤其 `yz_cms_frontend_tables.sql`）；
+2. **新库初始化**：导入业务数据，执行 `sql/` 下全部建表/变更 SQL（尤其 `yz_cms_frontend_tables.sql`、`alter_tenant_domain_add_custom.sql`）；
 3. **nginx**：
    - nginx 与 Go 同机 → upstream 用 `127.0.0.1:8081`，配置零改动；
-   - 跨机 → 只改两个 upstream 块中的 `server` 一行；
-4. **证书**：新机器宝塔上为两个域名重新申请/导入证书（含泛域名），路径与配置保持一致；
-5. **DNS**：将 `dh2.fun`、`yunzer.com.cn` 及泛解析 `*` 的 A 记录改指向新服务器 IP；
-6. **验证**：按第六节顺序逐一验证；
+   - 跨机 → 只改三个 upstream 块中的 `server` 一行（含扑底站点的 `go_backend_custom`）；
+4. **证书**：新机器宝塔上为两个域名重新申请/导入证书（含泛域名），路径与配置保持一致；自有域名的证书目录 `/www/wwwroot/ssl-certs` 整个复制过去（含 `_account/key.pem`——换了账号私钥等于换 ACME 账号，历史签发记录与频控额度都会重置）；
+5. **DNS**：将 `dh2.fun`、`yunzer.com.cn` 及泛解析 `*` 的 A 记录改指向新服务器 IP；`customdomain_cname_target` 对应子域的 A 记录也要改，租户侧的 CNAME 不用动；
+6. **验证**：按第七节顺序逐一验证；
 7. 确认无误后到域名服务商处调低旧解析 TTL、观察切换。
 
 ---
 
-*本文档对应代码：`go/controllers/tenant_site.go`（Host 识别与渲染）、`go/pkg/tagengine/`（标签引擎）、`go/themes/default/`（内置默认模板）、`sql/yz_cms_frontend_tables.sql`（建站数据表）。*
+*本文档对应代码：`go/controllers/tenant_site.go`（Host 识别与渲染）、`go/services/acme_cert.go`（自动签发与续期）、`go/services/domain_verify.go`（解析检测）、`go/controllers/acme_challenge.go`（HTTP-01 应答）、`go/pkg/tagengine/`（标签引擎）、`go/themes/default/`（内置默认模板）、`sql/yz_cms_frontend_tables.sql`（建站数据表）、`sql/alter_tenant_domain_add_custom.sql`（自有域名字段）。*
diff --git a/docs/自有域名绑定说明.md b/docs/自有域名绑定说明.md
new file mode 100644
index 0000000..287f553
--- /dev/null
+++ b/docs/自有域名绑定说明.md
@@ -0,0 +1,117 @@
+# 绑定自有域名操作说明（给租户看的版本）
+
+把你自己的域名（例如 `www.你的公司.com`）指向平台，访客访问时打开的还是你在后台配置的那套官网内容，与平台分配的二级域名完全一致。HTTPS 证书由系统自动申请与续期，你不需要买证书、不需要上传证书。
+
+整个过程三步：**填域名 → 加解析 → 点检测**。
+
+---
+
+## 一、填域名
+
+后台 →「我的域名」→ 右上角「绑定自有域名」。
+
+填写规则：
+
+- 填完整域名，例如 `www.example.com`；
+- 不要带 `http://`、`https://`，不要带路径和端口；
+- 根域名（`example.com`）和 `www.example.com` 是两个不同的域名。想两个都能访问，就绑两次；
+- 域名必须已完成实名认证与备案（国内服务器要求），否则解析能通但访问会被拦。
+
+提交后会看到一条记录，状态是「待生效」，这是正常的——还没加解析。
+
+---
+
+## 二、加解析
+
+弹窗里会显示平台给你的解析目标。到你买域名的地方（阿里云、腾讯云、DNSPod 等）的「域名解析」里添加记录：
+
+### 子域名（如 www、cn、shop）
+
+| 记录类型 | 主机记录 | 记录值 |
+|---|---|---|
+| CNAME | www | 弹窗里显示的 CNAME 目标 |
+
+### 根域名（如 example.com 本身）
+
+根域名在 DNS 标准里不能用 CNAME，只能用 A 记录：
+
+| 记录类型 | 主机记录 | 记录值 |
+|---|---|---|
+| A | @ | 弹窗里显示的 IP |
+
+几个容易踩的点：
+
+- **主机记录填 `www`，不要填 `www.example.com`**。解析商会自动补上域名后缀，填全了会变成 `www.example.com.example.com`。
+- **同一个主机记录下不能既有 CNAME 又有 A/MX 记录**。如果 `www` 已经有 A 记录指向别处，先删掉再加 CNAME。
+- **有 CDN 的先关掉**。域名挂在 CDN 上时解析指向的是 CDN 节点，系统检测不到平台地址，证书也签不下来。
+- **TTL 用默认值就行**。修改解析后需要等 TTL 时间生效，通常 10 分钟内，最长可能要几小时。
+
+---
+
+## 三、点检测
+
+回到「我的域名」，在这条自有域名记录上点「检测解析」。
+
+- 解析已生效 → 提示「正在申请 HTTPS 证书」。等 1～2 分钟刷新页面，「证书」列变成「已签发」、状态变成「已生效」，域名就能用了；
+- 解析没生效 → 提示当前解析到了哪里，对照第二步核对记录值，等一会儿再点。
+
+生效后用 `https://你的域名` 访问，看到的就是你的官网。
+
+---
+
+## 四、状态怎么看
+
+「我的域名」列表里有三列状态：
+
+| 列 | 取值 | 含义 |
+|---|---|---|
+| 状态 | 待生效 | 解析或证书还没就绪，暂时不能访问 |
+| 状态 | 已生效 | 可以正常访问 |
+| 状态 | 已禁用 | 被平台停用，联系平台管理员 |
+| 解析检测 | 未检测 / 已通过 / 未通过 | 鼠标悬浮看具体原因 |
+| 证书 | 待处理 / 签发中 / 已签发 / 签发失败 | 悬浮「已签发」看到期时间，悬浮「签发失败」看失败原因 |
+
+证书到期前系统会自动续期，你不用管。
+
+---
+
+## 五、常见问题
+
+**点了检测一直提示解析未生效**
+
+用命令行确认解析实际指向哪里（Windows 用 `nslookup`，Mac/Linux 用 `dig`）：
+
+```bash
+nslookup www.example.com
+dig +short www.example.com
+```
+
+看返回的结果是不是弹窗里给的目标。如果不是，说明记录没加对或者还没生效。
+
+**证书显示「签发失败」**
+
+悬浮在「签发失败」上看原因，常见两种：
+
+- 提到 80 端口或验证失败：你的域名可能开了强制 HTTPS 跳转，或者解析被 CDN 拦了。证书颁发机构需要通过 80 端口访问 `http://你的域名/.well-known/acme-challenge/...` 来验证域名归属；
+- 提到频率限制：短时间内失败次数太多。系统有 30 分钟冷却，等半小时再试。
+
+**能不能同时用平台二级域名和自己的域名**
+
+可以，两个都能访问同一套官网内容，互不影响。
+
+**换域名怎么办**
+
+先删掉旧的那条记录，再绑新域名。删除后旧域名立即无法访问，已签发的证书也不再续期。
+
+**一个租户能绑几个自有域名**
+
+一个。需要多绑（比如根域名和 www 都要）请联系平台管理员。
+
+---
+
+## 六、需要联系平台的情况
+
+- 弹窗提示「平台尚未配置解析目标」；
+- 提示「该域名已被绑定」但你确认没绑过；
+- 提示「该域名属于平台域名」——这种情况请改用「申请二级域名」；
+- 检测通过但证书连续失败超过一天。
diff --git a/go/conf/app.conf b/go/conf/app.conf
index 8d09288..039e47f 100644
--- a/go/conf/app.conf
+++ b/go/conf/app.conf
@@ -30,4 +30,25 @@ orm = mysql
 # StaticDir = /static:../front/dist
 
 # 映射 /uploads 路径到上传文件目录（项目根目录下的 uploads 文件夹） 
-StaticDir = /uploads:../uploads  
\ No newline at end of file
+StaticDir = /uploads:../uploads  
+
+# ==================== 租户自有域名绑定 / 自动 HTTPS ====================
+# 租户把自己的子域名 CNAME 到这个主机名（该主机名需先 A 记录指向本服务器）
+# 例：customdomain_cname_target = sites.yunzer.com.cn
+customdomain_cname_target =
+
+# 允许的 A 记录目标 IP（多个用英文逗号分隔）。根域通常不能用 CNAME，只能 A 记录。
+# 例：customdomain_a_ips = 1.2.3.4,5.6.7.8
+customdomain_a_ips =
+
+# Let's Encrypt 账号邮箱（证书到期提醒、账号注册用）
+acme_email =
+
+# ACME 目录地址。留空使用 Let's Encrypt 正式环境。
+# 联调时建议先填 staging 避免触发正式环境频控：
+# acme_directory = https://acme-staging-v02.api.letsencrypt.org/directory
+acme_directory =
+
+# 证书落盘根目录。签发后生成 {ssl_cert_dir}/{域名}/fullchain.pem 与 privkey.pem，
+# Nginx 扑底站点按 SNI 读取该目录。Go 进程需要对此目录有写权限。
+ssl_cert_dir = /www/wwwroot/ssl-certs
\ No newline at end of file
diff --git a/go/controllers/acme_challenge.go b/go/controllers/acme_challenge.go
new file mode 100644
index 0000000..28c5343
--- /dev/null
+++ b/go/controllers/acme_challenge.go
@@ -0,0 +1,35 @@
+package controllers
+
+import (
+	"strings"
+
+	"server/services"
+
+	beego "github.com/beego/beego/v2/server/web"
+)
+
+// AcmeChallengeController 处理 Let's Encrypt 的 HTTP-01 验证回访。
+//
+// 路由：GET /.well-known/acme-challenge/:token
+//
+// 该路由在 routers/router.go 中无条件注册，不受 APP_MODE 影响——证书颁发机构
+// 什么时候来验证与本服务以哪种模式启动无关。Nginx 扑底站点必须把这个路径按
+// 明文 HTTP 反代过来，不能 301 跳转到 HTTPS（首次签发时还没有证书）。
+type AcmeChallengeController struct {
+	beego.Controller
+}
+
+// Serve 返回 token 对应的 keyAuthorization（纯文本）
+func (c *AcmeChallengeController) Serve() {
+	token := strings.TrimSpace(c.Ctx.Input.Param(":token"))
+	keyAuth, ok := services.GetHTTP01Challenge(token)
+	if !ok {
+		c.Ctx.Output.SetStatus(404)
+		_ = c.Ctx.Output.Body([]byte("not found"))
+		return
+	}
+	c.Ctx.Output.Header("Content-Type", "text/plain; charset=utf-8")
+	// challenge 是一次性的，不能被任何中间层缓存
+	c.Ctx.Output.Header("Cache-Control", "no-store")
+	_ = c.Ctx.Output.Body([]byte(keyAuth))
+}
diff --git a/go/controllers/backend_domain.go b/go/controllers/backend_domain.go
index 1d70e1e..e32085f 100644
--- a/go/controllers/backend_domain.go
+++ b/go/controllers/backend_domain.go
@@ -323,20 +323,31 @@ func (c *BackendTenantDomainController) Index() {
 
 	tid, _ := c.GetUint64("tid")
 	statusStr := strings.TrimSpace(c.GetString("status"))
-	subDomain := strings.TrimSpace(c.GetString("sub_domain"))
+	keyword := strings.TrimSpace(c.GetString("sub_domain"))
+	domainTypeStr := strings.TrimSpace(c.GetString("domain_type"))
 
-	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).Filter("delete_time__isnull", true)
+	// 条件一次性拼好：SetCond 会覆盖 Filter 累积的条件，不能混用
+	cond := orm.NewCondition().And("delete_time__isnull", true)
 	if tid > 0 {
-		qs = qs.Filter("tid", tid)
+		cond = cond.And("tid", tid)
 	}
 	if statusStr != "" {
 		if st, err := strconv.Atoi(statusStr); err == nil {
-			qs = qs.Filter("status", st)
+			cond = cond.And("status", st)
 		}
 	}
-	if subDomain != "" {
-		qs = qs.Filter("sub_domain__icontains", subDomain)
+	if domainTypeStr != "" {
+		if dt, err := strconv.Atoi(domainTypeStr); err == nil {
+			cond = cond.And("domain_type", dt)
+		}
 	}
+	// 关键字同时匹配二级前缀与完整域名：自有域名没有 sub_domain，只能靠 full_domain 命中
+	if keyword != "" {
+		cond = cond.AndCond(orm.NewCondition().
+			Or("sub_domain__icontains", keyword).
+			Or("full_domain__icontains", keyword))
+	}
+	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).SetCond(cond)
 
 	total, err := qs.Count()
 	if err != nil {
@@ -349,8 +360,7 @@ func (c *BackendTenantDomainController) Index() {
 		jsonErr(&c.Controller, 500, 500, "获取租户域名失败: "+err.Error())
 		return
 	}
-	list := make([]models.SystemTenantDomain, 0, len(rows))
-	list = append(list, rows...)
+	list := tenantDomainList(rows)
 	c.Data["json"] = map[string]interface{}{
 		"code": 200,
 		"msg":  "success",
@@ -359,20 +369,21 @@ func (c *BackendTenantDomainController) Index() {
 	_ = c.ServeJSON()
 }
 
-// MyDomains GET /backend/domain/tenant/myDomains?tid=1
+// MyDomains GET /backend/domain/tenant/myDomains
+// 租户 ID 取登录态，忽略请求参数里的 tid，避免越权查看其他租户域名。
 func (c *BackendTenantDomainController) MyDomains() {
-	if _, err := requireBackend(&c.Controller); err != nil {
+	claims, err := requireBackend(&c.Controller)
+	if err != nil {
 		jsonErr(&c.Controller, 401, 401, err.Error())
 		return
 	}
-	tid, _ := c.GetUint64("tid")
-	if tid == 0 {
-		jsonErr(&c.Controller, 400, 400, "租户ID不能为空")
+	if claims.TenantId <= 0 {
+		jsonErr(&c.Controller, 400, 400, "当前登录账号未归属租户")
 		return
 	}
 	var rows []models.SystemTenantDomain
-	_, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
-		Filter("tid", tid).
+	_, err = models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("tid", claims.TenantId).
 		Filter("delete_time__isnull", true).
 		OrderBy("-id").
 		All(&rows)
@@ -380,23 +391,101 @@ func (c *BackendTenantDomainController) MyDomains() {
 		jsonErr(&c.Controller, 500, 500, "获取失败: "+err.Error())
 		return
 	}
-	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": rows}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": tenantDomainList(rows)}
 	_ = c.ServeJSON()
 }
 
-// Apply POST /backend/domain/tenant/apply  body:{tid,sub_domain,main_domain}
-func (c *BackendTenantDomainController) Apply() {
+// BindCustom POST /backend/domain/tenant/bindCustom  body:{domain}
+// 绑定租户自有域名。租户 ID 取登录态。
+func (c *BackendTenantDomainController) BindCustom() {
+	claims, err := requireBackend(&c.Controller)
+	if err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
+	if claims.TenantId <= 0 {
+		jsonErr(&c.Controller, 400, 400, "当前登录账号未归属租户")
+		return
+	}
+	raw, err := io.ReadAll(c.Ctx.Request.Body)
+	if err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	var p customDomainPayload
+	if err := json.Unmarshal(raw, &p); err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	id, status, errMsg := bindCustomDomain(uint64(claims.TenantId), p.Domain)
+	if errMsg != "" {
+		jsonErr(&c.Controller, status, status, errMsg)
+		return
+	}
+	c.Data["json"] = map[string]interface{}{
+		"code": 200,
+		"msg":  "绑定成功，请按提示配置解析后点击「检测解析」",
+		"data": map[string]interface{}{"id": id},
+	}
+	_ = c.ServeJSON()
+}
+
+// CheckCustomDns POST /backend/domain/tenant/checkCustomDns  body:{id}
+// 检测自有域名解析，通过后异步申请 HTTPS 证书。
+func (c *BackendTenantDomainController) CheckCustomDns() {
+	claims, err := requireBackend(&c.Controller)
+	if err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
+	if claims.TenantId <= 0 {
+		jsonErr(&c.Controller, 400, 400, "当前登录账号未归属租户")
+		return
+	}
+	raw, err := io.ReadAll(c.Ctx.Request.Body)
+	if err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	var p domainIDPayload
+	if err := json.Unmarshal(raw, &p); err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	data, status, errMsg := checkCustomDomainDNS(p.ID, uint64(claims.TenantId))
+	if errMsg != "" {
+		jsonErr(&c.Controller, status, status, errMsg)
+		return
+	}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": data}
+	_ = c.ServeJSON()
+}
+
+// CustomDomainGuide GET /backend/domain/tenant/customDomainGuide
+// 返回租户该怎么配解析（CNAME 目标 / A 记录 IP），前端不硬编码。
+func (c *BackendTenantDomainController) CustomDomainGuide() {
 	if _, err := requireBackend(&c.Controller); err != nil {
 		jsonErr(&c.Controller, 401, 401, err.Error())
 		return
 	}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": customDomainGuideData()}
+	_ = c.ServeJSON()
+}
+
+// Apply POST /backend/domain/tenant/apply  body:{sub_domain,main_domain}
+// 租户 ID 取登录态，不信请求体，避免替其他租户申请。
+func (c *BackendTenantDomainController) Apply() {
+	claims, err := requireBackend(&c.Controller)
+	if err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
 	raw, err := io.ReadAll(c.Ctx.Request.Body)
 	if err != nil {
 		jsonErr(&c.Controller, 400, 400, "参数错误")
 		return
 	}
 	var p struct {
-		Tid        uint64 `json:"tid"`
 		SubDomain  string `json:"sub_domain"`
 		MainDomain string `json:"main_domain"`
 	}
@@ -404,10 +493,11 @@ func (c *BackendTenantDomainController) Apply() {
 		jsonErr(&c.Controller, 400, 400, "参数错误")
 		return
 	}
-	if p.Tid == 0 {
-		jsonErr(&c.Controller, 400, 400, "租户ID不能为空")
+	if claims.TenantId <= 0 {
+		jsonErr(&c.Controller, 400, 400, "当前登录账号未归属租户")
 		return
 	}
+	tenantID := uint64(claims.TenantId)
 	sub := strings.TrimSpace(p.SubDomain)
 	main := strings.TrimSpace(p.MainDomain)
 	if sub == "" {
@@ -423,13 +513,14 @@ func (c *BackendTenantDomainController) Apply() {
 		return
 	}
 
-	// 该租户是否已有域名
+	// 该租户是否已申请过平台二级域名（自有域名单独计数，两者可以共存）
 	cnt, _ := models.Orm.QueryTable(new(models.SystemTenantDomain)).
-		Filter("tid", p.Tid).
+		Filter("tid", tenantID).
+		Filter("domain_type", models.DomainTypePlatformSub).
 		Filter("delete_time__isnull", true).
 		Count()
 	if cnt > 0 {
-		jsonErr(&c.Controller, 400, 400, "该租户已有域名，请删除后再次申请")
+		jsonErr(&c.Controller, 400, 400, "该租户已有二级域名，请删除后再次申请")
 		return
 	}
 
@@ -457,9 +548,10 @@ func (c *BackendTenantDomainController) Apply() {
 
 	full := sub + "." + main
 	now := time.Now()
-	tid := p.Tid
+	tid := tenantID
 	row := &models.SystemTenantDomain{
 		Tid:        &tid,
+		DomainType: models.DomainTypePlatformSub,
 		SubDomain:  &sub,
 		MainDomain: &main,
 		FullDomain: &full,
@@ -500,6 +592,10 @@ func (c *BackendTenantDomainController) Audit() {
 		jsonErr(&c.Controller, 404, 404, "域名不存在")
 		return
 	}
+	if row.DomainType == models.DomainTypeCustom {
+		jsonErr(&c.Controller, 400, 400, "自有域名无需人工审核，解析检测与证书签发通过后自动生效")
+		return
+	}
 	if row.Status != 0 {
 		jsonErr(&c.Controller, 400, 400, "该域名已审核过了")
 		return
@@ -547,11 +643,20 @@ func (c *BackendTenantDomainController) ToggleStatus() {
 		return
 	}
 	if row.Status == 0 {
-		jsonErr(&c.Controller, 400, 400, "审核中不可操作")
+		if row.DomainType == models.DomainTypeCustom {
+			jsonErr(&c.Controller, 400, 400, "该域名尚未生效（解析或证书未就绪），无需禁用")
+		} else {
+			jsonErr(&c.Controller, 400, 400, "审核中不可操作")
+		}
 		return
 	}
 	newStatus := 2
 	if row.Status == 2 {
+		// 自有域名重新启用要求证书还在，否则启用后访问会报证书错误
+		if row.DomainType == models.DomainTypeCustom && row.SSLStatus != models.SSLStatusIssued {
+			jsonErr(&c.Controller, 400, 400, "该域名的 HTTPS 证书未就绪，请先检测解析并等待证书签发")
+			return
+		}
 		newStatus = 1
 	}
 	now := time.Now()
@@ -568,8 +673,10 @@ func (c *BackendTenantDomainController) ToggleStatus() {
 }
 
 // Delete DELETE /backend/domain/tenant/delete/:id
+// 只能删除本租户的域名记录。
 func (c *BackendTenantDomainController) Delete() {
-	if _, err := requireBackend(&c.Controller); err != nil {
+	claims, err := requireBackend(&c.Controller)
+	if err != nil {
 		jsonErr(&c.Controller, 401, 401, err.Error())
 		return
 	}
@@ -579,11 +686,14 @@ func (c *BackendTenantDomainController) Delete() {
 		jsonErr(&c.Controller, 400, 400, "参数错误")
 		return
 	}
-	now := time.Now()
-	n, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).
 		Filter("id", id).
-		Filter("delete_time__isnull", true).
-		Update(map[string]interface{}{"delete_time": now, "update_time": now})
+		Filter("delete_time__isnull", true)
+	if claims.TenantId > 0 {
+		qs = qs.Filter("tid", claims.TenantId)
+	}
+	now := time.Now()
+	n, err := qs.Update(map[string]interface{}{"delete_time": now, "update_time": now})
 	if err != nil {
 		jsonErr(&c.Controller, 500, 500, "删除失败: "+err.Error())
 		return
diff --git a/go/controllers/domain_common.go b/go/controllers/domain_common.go
index 370aefd..9158589 100644
--- a/go/controllers/domain_common.go
+++ b/go/controllers/domain_common.go
@@ -2,6 +2,11 @@ package controllers
 
 import (
 	"regexp"
+	"strings"
+	"time"
+
+	"server/models"
+	"server/services"
 
 	beego "github.com/beego/beego/v2/server/web"
 )
@@ -19,3 +24,278 @@ type domainPoolPayload struct {
 }
 
 var subDomainRe = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9-]{0,61}[a-zA-Z0-9]$`)
+
+// customDomainPayload 绑定自有域名的请求体。
+// tid 仅平台端（运营代操作）使用；租户端一律以登录态里的租户 ID 为准。
+type customDomainPayload struct {
+	Tid    uint64 `json:"tid"`
+	Domain string `json:"domain"`
+}
+
+// domainIDPayload 仅带域名记录 ID 的请求体
+type domainIDPayload struct {
+	ID uint64 `json:"id"`
+}
+
+// ===== 列表输出 =====
+
+// tenantDomainDTO 把域名记录转成前端需要的结构。
+// 直接把 ORM 结构体丢给前端会让时间字段变成 RFC3339，且拿不到租户名称，
+// 因此列表统一走这里：时间格式化，租户名按 tid 批量补齐。
+func tenantDomainDTO(row models.SystemTenantDomain, tenantNames map[uint64]string) map[string]interface{} {
+	item := map[string]interface{}{
+		"id":             row.ID,
+		"tid":            row.Tid,
+		"domain_type":    row.DomainType,
+		"sub_domain":     strPtrVal(row.SubDomain),
+		"main_domain":    strPtrVal(row.MainDomain),
+		"full_domain":    strPtrVal(row.FullDomain),
+		"status":         row.Status,
+		"ssl_status":     row.SSLStatus,
+		"ssl_error":      strPtrVal(row.SSLError),
+		"verify_status":  row.VerifyStatus,
+		"verify_msg":     strPtrVal(row.VerifyMsg),
+		"tenant_name":    "",
+		"ssl_expire_at":  "",
+		"last_verify_at": "",
+		"create_time":    row.CreateTime.Format("2006-01-02 15:04:05"),
+	}
+	if row.Tid != nil && tenantNames != nil {
+		item["tenant_name"] = tenantNames[*row.Tid]
+	}
+	if row.SSLExpireAt != nil {
+		item["ssl_expire_at"] = row.SSLExpireAt.Format("2006-01-02 15:04:05")
+	}
+	if row.LastVerifyAt != nil {
+		item["last_verify_at"] = row.LastVerifyAt.Format("2006-01-02 15:04:05")
+	}
+	return item
+}
+
+// tenantDomainList 批量转换，顺带一次性查出涉及的租户名称
+func tenantDomainList(rows []models.SystemTenantDomain) []map[string]interface{} {
+	tenantNames := lookupTenantNames(rows)
+	list := make([]map[string]interface{}, 0, len(rows))
+	for i := range rows {
+		list = append(list, tenantDomainDTO(rows[i], tenantNames))
+	}
+	return list
+}
+
+// lookupTenantNames 按 tid 查租户名称，避免列表里逐行查库
+func lookupTenantNames(rows []models.SystemTenantDomain) map[uint64]string {
+	ids := make([]uint64, 0, len(rows))
+	seen := make(map[uint64]bool, len(rows))
+	for i := range rows {
+		if rows[i].Tid == nil || *rows[i].Tid == 0 || seen[*rows[i].Tid] {
+			continue
+		}
+		seen[*rows[i].Tid] = true
+		ids = append(ids, *rows[i].Tid)
+	}
+	names := make(map[uint64]string, len(ids))
+	if len(ids) == 0 {
+		return names
+	}
+	var tenants []models.SystemTenant
+	if _, err := models.Orm.QueryTable(new(models.SystemTenant)).
+		Filter("id__in", ids).
+		All(&tenants, "ID", "TenantName", "TenantShortName"); err != nil {
+		return names
+	}
+	for i := range tenants {
+		name := strings.TrimSpace(tenants[i].TenantName)
+		if name == "" && tenants[i].TenantShortName != nil {
+			name = strings.TrimSpace(*tenants[i].TenantShortName)
+		}
+		names[tenants[i].ID] = name
+	}
+	return names
+}
+
+func strPtrVal(p *string) string {
+	if p == nil {
+		return ""
+	}
+	return *p
+}
+
+// ===== 以下逻辑被 backend / platform 两套控制器共用 =====
+
+// bindCustomDomain 为租户绑定自有域名。
+// 返回 (记录ID, HTTP状态码, 错误信息)；错误信息为空表示成功。
+func bindCustomDomain(tid uint64, rawDomain string) (uint64, int, string) {
+	if tid == 0 {
+		return 0, 400, "租户ID不能为空"
+	}
+
+	host := services.NormalizeHost(rawDomain)
+	if host == "" {
+		return 0, 400, "域名格式不正确，请填写完整域名（如 www.example.com）"
+	}
+
+	// 通配符只在平台域名池里有意义：自有域名一条记录对应一个精确 Host，
+	// 悄悄把 *.example.com 收成 example.com 会绑到用户没想绑的域名上。
+	if strings.HasPrefix(strings.TrimSpace(rawDomain), "*.") {
+		return 0, 400, "暂不支持通配符域名，请填写要绑定的具体域名（如 www.example.com）"
+	}
+
+	// 租户必须存在且未停用（平台端可以传任意 tid，这里兜住手误）
+	tenantOK, _ := models.Orm.QueryTable(new(models.SystemTenant)).
+		Filter("id", tid).
+		Filter("delete_time__isnull", true).
+		Count()
+	if tenantOK == 0 {
+		return 0, 400, "租户不存在"
+	}
+
+	// 不允许绑定平台自己的域名：平台主域及其任意子域都由域名池统一发放
+	msg, err := checkNotPlatformDomain(host)
+	if err != nil {
+		return 0, 500, "域名校验失败，请稍后重试"
+	}
+	if msg != "" {
+		return 0, 400, msg
+	}
+
+	// 全局唯一：同一个域名只能指向一个租户官网
+	used, _ := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("full_domain", host).
+		Filter("delete_time__isnull", true).
+		Count()
+	if used > 0 {
+		return 0, 400, "该域名已被绑定"
+	}
+
+	// 每个租户一个自有域名（平台二级域名不受此限制，两者可以同时存在）
+	exists, _ := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("tid", tid).
+		Filter("domain_type", models.DomainTypeCustom).
+		Filter("delete_time__isnull", true).
+		Count()
+	if exists > 0 {
+		return 0, 400, "该租户已绑定自有域名，请先删除后再绑定新域名"
+	}
+
+	now := time.Now()
+	tidCopy := tid
+	row := &models.SystemTenantDomain{
+		Tid:          &tidCopy,
+		DomainType:   models.DomainTypeCustom,
+		FullDomain:   &host,
+		Status:       0, // DNS 检测通过且证书签发成功后自动置 1
+		SSLStatus:    models.SSLStatusPending,
+		VerifyStatus: models.VerifyStatusNone,
+		CreateTime:   now,
+		UpdateTime:   &now,
+	}
+	id, err := models.Orm.Insert(row)
+	if err != nil {
+		return 0, 500, "绑定失败: " + err.Error()
+	}
+	return uint64(id), 200, ""
+}
+
+// checkNotPlatformDomain 校验域名不属于平台域名池（含子域）。
+// 平台域名的解析与证书由平台统一维护，租户只能通过「申请二级域名」获得。
+// 返回 (拒绝原因, 查询错误)。查询出错时必须由调用方拒绝，
+// 否则一次数据库抖动就能让租户把平台主域绑走。
+func checkNotPlatformDomain(host string) (string, error) {
+	var pools []models.SystemDomainPool
+	if _, err := models.Orm.QueryTable(new(models.SystemDomainPool)).
+		Filter("delete_time__isnull", true).
+		All(&pools); err != nil {
+		return "", err
+	}
+	for i := range pools {
+		main := services.NormalizeHost(pools[i].MainDomain)
+		if main == "" {
+			continue
+		}
+		if host == main || strings.HasSuffix(host, "."+main) {
+			return "该域名属于平台域名 " + main + "，请改用「申请二级域名」功能", nil
+		}
+	}
+	return "", nil
+}
+
+// checkCustomDomainDNS 检测自有域名解析，通过则异步触发证书签发。
+// tid 传 0 表示不限制归属（平台端运营场景）。
+// 返回 (给前端的数据, HTTP状态码, 错误信息)。
+func checkCustomDomainDNS(id, tid uint64) (map[string]interface{}, int, string) {
+	if id == 0 {
+		return nil, 400, "参数错误"
+	}
+
+	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("id", id).
+		Filter("delete_time__isnull", true)
+	if tid > 0 {
+		qs = qs.Filter("tid", tid)
+	}
+	var row models.SystemTenantDomain
+	if err := qs.One(&row); err != nil {
+		return nil, 404, "域名不存在"
+	}
+	if row.DomainType != models.DomainTypeCustom {
+		return nil, 400, "平台二级域名无需检测解析"
+	}
+	if row.FullDomain == nil || *row.FullDomain == "" {
+		return nil, 400, "域名数据异常，请删除后重新绑定"
+	}
+
+	host := *row.FullDomain
+	passed, msg := services.VerifyCustomDomainDNS(host)
+	// verify_msg 字段 varchar(500)，解析出的 IP 列表可能很长，截断避免写库失败
+	if len(msg) > 480 {
+		msg = msg[:480]
+	}
+
+	verifyStatus := models.VerifyStatusFailed
+	if passed {
+		verifyStatus = models.VerifyStatusPassed
+	}
+	now := time.Now()
+	if _, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("id", id).
+		Update(map[string]interface{}{
+			"verify_status":  verifyStatus,
+			"verify_msg":     msg,
+			"last_verify_at": now,
+			"update_time":    now,
+		}); err != nil {
+		return nil, 500, "保存检测结果失败: " + err.Error()
+	}
+
+	data := map[string]interface{}{
+		"verify_status": verifyStatus,
+		"verify_msg":    msg,
+		"ssl_status":    row.SSLStatus,
+	}
+	if !passed {
+		return data, 200, ""
+	}
+
+	// 解析已通过：证书没签好就发起签发
+	if row.SSLStatus == models.SSLStatusIssued {
+		data["ssl_message"] = "解析正常，证书已就绪"
+		return data, 200, ""
+	}
+	if ok, reason := services.IssueCertificateAsync(id, host); ok {
+		data["ssl_status"] = models.SSLStatusIssuing
+		data["ssl_message"] = "解析已通过，正在申请 HTTPS 证书，请稍后刷新查看"
+	} else {
+		data["ssl_message"] = reason
+	}
+	return data, 200, ""
+}
+
+// customDomainGuideData 返回租户配置解析所需的信息
+func customDomainGuideData() map[string]interface{} {
+	guide := services.GetCustomDomainGuide()
+	return map[string]interface{}{
+		"cname_target": guide.CnameTarget,
+		"a_ips":        guide.AIPs,
+		"configured":   guide.CnameTarget != "" || len(guide.AIPs) > 0,
+	}
+}
diff --git a/go/controllers/platform_domain.go b/go/controllers/platform_domain.go
index 8839874..aef4cc7 100644
--- a/go/controllers/platform_domain.go
+++ b/go/controllers/platform_domain.go
@@ -323,20 +323,31 @@ func (c *PlatformTenantDomainController) Index() {
 
 	tid, _ := c.GetUint64("tid")
 	statusStr := strings.TrimSpace(c.GetString("status"))
-	subDomain := strings.TrimSpace(c.GetString("sub_domain"))
+	keyword := strings.TrimSpace(c.GetString("sub_domain"))
+	domainTypeStr := strings.TrimSpace(c.GetString("domain_type"))
 
-	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).Filter("delete_time__isnull", true)
+	// 条件一次性拼好：SetCond 会覆盖 Filter 累积的条件，不能混用
+	cond := orm.NewCondition().And("delete_time__isnull", true)
 	if tid > 0 {
-		qs = qs.Filter("tid", tid)
+		cond = cond.And("tid", tid)
 	}
 	if statusStr != "" {
 		if st, err := strconv.Atoi(statusStr); err == nil {
-			qs = qs.Filter("status", st)
+			cond = cond.And("status", st)
 		}
 	}
-	if subDomain != "" {
-		qs = qs.Filter("sub_domain__icontains", subDomain)
+	if domainTypeStr != "" {
+		if dt, err := strconv.Atoi(domainTypeStr); err == nil {
+			cond = cond.And("domain_type", dt)
+		}
 	}
+	// 关键字同时匹配二级前缀与完整域名：自有域名没有 sub_domain，只能靠 full_domain 命中
+	if keyword != "" {
+		cond = cond.AndCond(orm.NewCondition().
+			Or("sub_domain__icontains", keyword).
+			Or("full_domain__icontains", keyword))
+	}
+	qs := models.Orm.QueryTable(new(models.SystemTenantDomain)).SetCond(cond)
 
 	total, err := qs.Count()
 	if err != nil {
@@ -349,8 +360,7 @@ func (c *PlatformTenantDomainController) Index() {
 		jsonErr(&c.Controller, 500, 500, "获取租户域名失败: "+err.Error())
 		return
 	}
-	list := make([]models.SystemTenantDomain, 0, len(rows))
-	list = append(list, rows...)
+	list := tenantDomainList(rows)
 	c.Data["json"] = map[string]interface{}{
 		"code": 200,
 		"msg":  "success",
@@ -360,6 +370,7 @@ func (c *PlatformTenantDomainController) Index() {
 }
 
 // MyDomains GET /platform/domain/tenant/myDomains?tid=1
+// 平台端账号不归属租户，tid 必须显式传入（运营代租户查看）。
 func (c *PlatformTenantDomainController) MyDomains() {
 	if _, err := requirePlatform(&c.Controller); err != nil {
 		jsonErr(&c.Controller, 401, 401, err.Error())
@@ -380,7 +391,73 @@ func (c *PlatformTenantDomainController) MyDomains() {
 		jsonErr(&c.Controller, 500, 500, "获取失败: "+err.Error())
 		return
 	}
-	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": rows}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": tenantDomainList(rows)}
+	_ = c.ServeJSON()
+}
+
+// BindCustom POST /platform/domain/tenant/bindCustom  body:{tid,domain}
+// 平台端代租户绑定自有域名，tid 必传。
+func (c *PlatformTenantDomainController) BindCustom() {
+	if _, err := requirePlatform(&c.Controller); err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
+	raw, err := io.ReadAll(c.Ctx.Request.Body)
+	if err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	var p customDomainPayload
+	if err := json.Unmarshal(raw, &p); err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	id, status, errMsg := bindCustomDomain(p.Tid, p.Domain)
+	if errMsg != "" {
+		jsonErr(&c.Controller, status, status, errMsg)
+		return
+	}
+	c.Data["json"] = map[string]interface{}{
+		"code": 200,
+		"msg":  "绑定成功，请按提示配置解析后点击「检测解析」",
+		"data": map[string]interface{}{"id": id},
+	}
+	_ = c.ServeJSON()
+}
+
+// CheckCustomDns POST /platform/domain/tenant/checkCustomDns  body:{id}
+// 平台端不限制域名归属，可为任意租户触发检测与签发。
+func (c *PlatformTenantDomainController) CheckCustomDns() {
+	if _, err := requirePlatform(&c.Controller); err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
+	raw, err := io.ReadAll(c.Ctx.Request.Body)
+	if err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	var p domainIDPayload
+	if err := json.Unmarshal(raw, &p); err != nil {
+		jsonErr(&c.Controller, 400, 400, "参数错误")
+		return
+	}
+	data, status, errMsg := checkCustomDomainDNS(p.ID, 0)
+	if errMsg != "" {
+		jsonErr(&c.Controller, status, status, errMsg)
+		return
+	}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": data}
+	_ = c.ServeJSON()
+}
+
+// CustomDomainGuide GET /platform/domain/tenant/customDomainGuide
+func (c *PlatformTenantDomainController) CustomDomainGuide() {
+	if _, err := requirePlatform(&c.Controller); err != nil {
+		jsonErr(&c.Controller, 401, 401, err.Error())
+		return
+	}
+	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": customDomainGuideData()}
 	_ = c.ServeJSON()
 }
 
@@ -423,13 +500,14 @@ func (c *PlatformTenantDomainController) Apply() {
 		return
 	}
 
-	// 该租户是否已有域名
+	// 该租户是否已申请过平台二级域名（自有域名单独计数，两者可以共存）
 	cnt, _ := models.Orm.QueryTable(new(models.SystemTenantDomain)).
 		Filter("tid", p.Tid).
+		Filter("domain_type", models.DomainTypePlatformSub).
 		Filter("delete_time__isnull", true).
 		Count()
 	if cnt > 0 {
-		jsonErr(&c.Controller, 400, 400, "该租户已有域名，请删除后再次申请")
+		jsonErr(&c.Controller, 400, 400, "该租户已有二级域名，请删除后再次申请")
 		return
 	}
 
@@ -460,6 +538,7 @@ func (c *PlatformTenantDomainController) Apply() {
 	tid := p.Tid
 	row := &models.SystemTenantDomain{
 		Tid:        &tid,
+		DomainType: models.DomainTypePlatformSub,
 		SubDomain:  &sub,
 		MainDomain: &main,
 		FullDomain: &full,
@@ -500,6 +579,10 @@ func (c *PlatformTenantDomainController) Audit() {
 		jsonErr(&c.Controller, 404, 404, "域名不存在")
 		return
 	}
+	if row.DomainType == models.DomainTypeCustom {
+		jsonErr(&c.Controller, 400, 400, "自有域名无需人工审核，解析检测与证书签发通过后自动生效")
+		return
+	}
 	if row.Status != 0 {
 		jsonErr(&c.Controller, 400, 400, "该域名已审核过了")
 		return
@@ -547,11 +630,20 @@ func (c *PlatformTenantDomainController) ToggleStatus() {
 		return
 	}
 	if row.Status == 0 {
-		jsonErr(&c.Controller, 400, 400, "审核中不可操作")
+		if row.DomainType == models.DomainTypeCustom {
+			jsonErr(&c.Controller, 400, 400, "该域名尚未生效（解析或证书未就绪），无需禁用")
+		} else {
+			jsonErr(&c.Controller, 400, 400, "审核中不可操作")
+		}
 		return
 	}
 	newStatus := 2
 	if row.Status == 2 {
+		// 自有域名重新启用要求证书还在，否则启用后访问会报证书错误
+		if row.DomainType == models.DomainTypeCustom && row.SSLStatus != models.SSLStatusIssued {
+			jsonErr(&c.Controller, 400, 400, "该域名的 HTTPS 证书未就绪，请先检测解析并等待证书签发")
+			return
+		}
 		newStatus = 1
 	}
 	now := time.Now()
diff --git a/go/go.mod b/go/go.mod
index 591d3ea..42ea363 100644
--- a/go/go.mod
+++ b/go/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/beego/beego/v2 v2.1.0
 	github.com/golang-jwt/jwt/v5 v5.2.1
 	github.com/qiniu/go-sdk/v7 v7.18.2
-	golang.org/x/crypto v0.1.0 // indirect
+	golang.org/x/crypto v0.1.0
 )
 
 require (
diff --git a/go/main.go b/go/main.go
index 6a86842..4251303 100644
--- a/go/main.go
+++ b/go/main.go
@@ -2,8 +2,8 @@ package main
 
 import (
 	"server/models"
-	"server/services"
 	_ "server/routers"
+	"server/services"
 	"server/version"
 
 	beego "github.com/beego/beego/v2/server/web"
@@ -27,5 +27,8 @@ func main() {
 	// 启动日程提醒定时任务
 	services.StartReminderScheduler(make(chan struct{}))
 
+	// 启动自有域名证书续期任务（到期前 30 天自动续签 Let's Encrypt 证书）
+	services.StartCertRenewScheduler(make(chan struct{}))
+
 	beego.Run()
 }
diff --git a/go/models/system_tenant_domain.go b/go/models/system_tenant_domain.go
index e19b85c..3d27347 100644
--- a/go/models/system_tenant_domain.go
+++ b/go/models/system_tenant_domain.go
@@ -2,14 +2,50 @@ package models
 
 import "time"
 
-// SystemTenantDomain 租户域名表 yz_tenant_domain
+// 域名类型
+const (
+	DomainTypePlatformSub = 1 // 平台二级域名（从主域名池申请）
+	DomainTypeCustom      = 2 // 租户自有域名（绑定后自动签发证书）
+)
+
+// 证书状态
+const (
+	SSLStatusPending = 0 // 待处理
+	SSLStatusIssuing = 1 // 签发中
+	SSLStatusIssued  = 2 // 已签发
+	SSLStatusFailed  = 3 // 签发失败
+)
+
+// DNS 解析校验状态
+const (
+	VerifyStatusNone   = 0 // 未检测
+	VerifyStatusPassed = 1 // 已通过
+	VerifyStatusFailed = 2 // 未通过
+)
+
+// SystemTenantDomain 租户域名表 yz_system_tenant_domain
+//
+// 一条记录代表一个可访问租户官网的域名。两类来源：
+//   - domain_type=1 平台二级域名：sub_domain + main_domain 组成 full_domain，走人工审核，
+//     HTTPS 由平台泛域名证书覆盖，ssl_status 不参与判断。
+//   - domain_type=2 租户自有域名：full_domain 为租户自己的完整主机名，sub_domain / main_domain 留空，
+//     DNS 检测通过后自动签发 Let's Encrypt 证书，签发成功才置 status=1。
 type SystemTenantDomain struct {
-	ID         uint64     `orm:"column(id);pk;auto" json:"id"`
-	Tid        *uint64    `orm:"column(tid);null" json:"tid"`
-	SubDomain  *string    `orm:"column(sub_domain);size(50);null" json:"sub_domain"`
-	MainDomain *string    `orm:"column(main_domain);size(255);null" json:"main_domain"`
-	FullDomain *string    `orm:"column(full_domain);size(255);null" json:"full_domain"`
-	Status     int        `orm:"column(status);null" json:"status"` // 1已生效 / 0审核中 / 2禁用
+	ID         uint64  `orm:"column(id);pk;auto" json:"id"`
+	Tid        *uint64 `orm:"column(tid);null" json:"tid"`
+	DomainType int     `orm:"column(domain_type);default(1)" json:"domain_type"`
+	SubDomain  *string `orm:"column(sub_domain);size(50);null" json:"sub_domain"`
+	MainDomain *string `orm:"column(main_domain);size(255);null" json:"main_domain"`
+	FullDomain *string `orm:"column(full_domain);size(255);null" json:"full_domain"`
+	Status     int     `orm:"column(status);null" json:"status"` // 1已生效 / 0审核中 / 2禁用
+
+	SSLStatus    int        `orm:"column(ssl_status);default(0)" json:"ssl_status"`
+	SSLExpireAt  *time.Time `orm:"column(ssl_expire_at);type(datetime);null" json:"ssl_expire_at"`
+	SSLError     *string    `orm:"column(ssl_error);size(500);null" json:"ssl_error"`
+	VerifyStatus int        `orm:"column(verify_status);default(0)" json:"verify_status"`
+	VerifyMsg    *string    `orm:"column(verify_msg);size(500);null" json:"verify_msg"`
+	LastVerifyAt *time.Time `orm:"column(last_verify_at);type(datetime);null" json:"last_verify_at"`
+
 	CreateTime time.Time  `orm:"column(create_time);type(datetime);auto_now_add" json:"create_time"`
 	UpdateTime *time.Time `orm:"column(update_time);type(datetime);auto_now;null" json:"update_time"`
 	DeleteTime *time.Time `orm:"column(delete_time);type(datetime);null" json:"delete_time"`
diff --git a/go/routers/backend/backend.go b/go/routers/backend/backend.go
index acfb9e4..d6c3f5f 100644
--- a/go/routers/backend/backend.go
+++ b/go/routers/backend/backend.go
@@ -201,6 +201,9 @@ func RegisterAuthRoutes() {
 	beego.Router("/backend/domain/tenant/index", &controllers.BackendTenantDomainController{}, "get:Index")
 	beego.Router("/backend/domain/tenant/myDomains", &controllers.BackendTenantDomainController{}, "get:MyDomains")
 	beego.Router("/backend/domain/tenant/apply", &controllers.BackendTenantDomainController{}, "post:Apply")
+	beego.Router("/backend/domain/tenant/bindCustom", &controllers.BackendTenantDomainController{}, "post:BindCustom")
+	beego.Router("/backend/domain/tenant/checkCustomDns", &controllers.BackendTenantDomainController{}, "post:CheckCustomDns")
+	beego.Router("/backend/domain/tenant/customDomainGuide", &controllers.BackendTenantDomainController{}, "get:CustomDomainGuide")
 	beego.Router("/backend/domain/tenant/audit", &controllers.BackendTenantDomainController{}, "post:Audit")
 	beego.Router("/backend/domain/tenant/toggleStatus", &controllers.BackendTenantDomainController{}, "post:ToggleStatus")
 	beego.Router("/backend/domain/tenant/delete/:id", &controllers.BackendTenantDomainController{}, "delete:Delete")
diff --git a/go/routers/platform/platform.go b/go/routers/platform/platform.go
index 6ebadf1..0440cbe 100644
--- a/go/routers/platform/platform.go
+++ b/go/routers/platform/platform.go
@@ -95,6 +95,9 @@ func Register() {
 	beego.Router("/platform/domain/tenant/index", &controllers.PlatformTenantDomainController{}, "get:Index")
 	beego.Router("/platform/domain/tenant/myDomains", &controllers.PlatformTenantDomainController{}, "get:MyDomains")
 	beego.Router("/platform/domain/tenant/apply", &controllers.PlatformTenantDomainController{}, "post:Apply")
+	beego.Router("/platform/domain/tenant/bindCustom", &controllers.PlatformTenantDomainController{}, "post:BindCustom")
+	beego.Router("/platform/domain/tenant/checkCustomDns", &controllers.PlatformTenantDomainController{}, "post:CheckCustomDns")
+	beego.Router("/platform/domain/tenant/customDomainGuide", &controllers.PlatformTenantDomainController{}, "get:CustomDomainGuide")
 	beego.Router("/platform/domain/tenant/audit", &controllers.PlatformTenantDomainController{}, "post:Audit")
 	beego.Router("/platform/domain/tenant/toggleStatus", &controllers.PlatformTenantDomainController{}, "post:ToggleStatus")
 	beego.Router("/platform/domain/tenant/delete/:id", &controllers.PlatformTenantDomainController{}, "delete:Delete")
diff --git a/go/routers/router.go b/go/routers/router.go
index 6ce9aef..5f0a062 100644
--- a/go/routers/router.go
+++ b/go/routers/router.go
@@ -3,6 +3,7 @@ package routers
 import (
 	"os"
 
+	"server/controllers"
 	"server/middleware"
 	"server/routers/api"
 	"server/routers/app"
@@ -35,6 +36,10 @@ func init() {
 	// 全局操作日志：请求开始采集并异步写入
 	beego.InsertFilter("*", beego.BeforeRouter, middleware.BeginOperationLog)
 
+	// Let's Encrypt HTTP-01 验证回访。
+	// 无条件注册：证书颁发机构何时来验证与 APP_MODE 无关，任何启动模式都必须能应答。
+	beego.Router("/.well-known/acme-challenge/:token", &controllers.AcmeChallengeController{}, "get:Serve")
+
 	// 根据运行模式选择要注册的路由组
 	// 优先读取环境变量 APP_MODE，其次读取配置 app_mode，默认 all
 	mode := os.Getenv("APP_MODE")
diff --git a/go/services/acme_cert.go b/go/services/acme_cert.go
new file mode 100644
index 0000000..fcfffa8
--- /dev/null
+++ b/go/services/acme_cert.go
@@ -0,0 +1,528 @@
+package services
+
+import (
+	"context"
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+
+	"server/models"
+
+	"github.com/beego/beego/v2/core/logs"
+	beego "github.com/beego/beego/v2/server/web"
+	"golang.org/x/crypto/acme"
+)
+
+const (
+	acmeAccountDir     = "_account"
+	acmeAccountKeyFile = "key.pem"
+	acmeChallengeDir   = "_challenges"
+	certFileName       = "fullchain.pem"
+	keyFileName        = "privkey.pem"
+
+	// 签发失败后的冷却时间。Let's Encrypt 对同一账号的验证失败次数有频控
+	// （每小时 5 次），冷却可避免租户反复点击把额度打满。
+	issueFailureCooldown = 30 * time.Minute
+
+	// 单次签发的整体超时。HTTP-01 需要等 CA 回访，给足时间但不能无限等。
+	issueTimeout = 3 * time.Minute
+
+	// 证书到期前多少天开始续期
+	renewBeforeDays = 30
+)
+
+var (
+	challengeMu    sync.RWMutex
+	challengeStore = make(map[string]string) // token -> keyAuthorization
+
+	issueMu       sync.Mutex
+	issuing       = make(map[string]bool)      // host -> 是否正在签发
+	lastFailureAt = make(map[string]time.Time) // host -> 最近一次签发失败时间
+)
+
+// ===== challenge 存取（供 /.well-known/acme-challenge/:token 路由使用）=====
+
+// challengeTokenRe ACME token 的合法字符集（base64url）。
+// token 会被拼进文件名，必须先校验，避免路径穿越。
+var challengeTokenRe = regexp.MustCompile(`^[A-Za-z0-9_-]{16,128}$`)
+
+func challengeFilePath(token string) string {
+	return filepath.Join(SSLCertDir(), acmeChallengeDir, token)
+}
+
+// GetHTTP01Challenge 返回 token 对应的 keyAuthorization。
+//
+// 先查内存，再查磁盘。磁盘这层是为拆进程部署准备的：签发是由 backend/platform
+// 接口触发的，而 CA 的回访只会落到 Nginx 扑底站点指向的那个进程，两者可能不是
+// 同一个进程，只靠内存会验证失败。
+func GetHTTP01Challenge(token string) (string, bool) {
+	challengeMu.RLock()
+	v, ok := challengeStore[token]
+	challengeMu.RUnlock()
+	if ok {
+		return v, true
+	}
+
+	if !challengeTokenRe.MatchString(token) {
+		return "", false
+	}
+	raw, err := os.ReadFile(challengeFilePath(token))
+	if err != nil {
+		return "", false
+	}
+	return strings.TrimSpace(string(raw)), true
+}
+
+func putHTTP01Challenge(token, keyAuth string) {
+	challengeMu.Lock()
+	challengeStore[token] = keyAuth
+	challengeMu.Unlock()
+
+	if !challengeTokenRe.MatchString(token) {
+		return
+	}
+	dir := filepath.Join(SSLCertDir(), acmeChallengeDir)
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		logs.Warn("[acme] 创建 challenge 目录失败（将只依赖内存）: %v", err)
+		return
+	}
+	if err := os.WriteFile(challengeFilePath(token), []byte(keyAuth), 0o644); err != nil {
+		logs.Warn("[acme] 写入 challenge 文件失败（将只依赖内存）: %v", err)
+	}
+}
+
+func deleteHTTP01Challenge(token string) {
+	challengeMu.Lock()
+	delete(challengeStore, token)
+	challengeMu.Unlock()
+
+	if challengeTokenRe.MatchString(token) {
+		_ = os.Remove(challengeFilePath(token))
+	}
+}
+
+// ===== 配置 =====
+
+// SSLCertDir 证书落盘根目录
+func SSLCertDir() string {
+	dir, _ := beego.AppConfig.String("ssl_cert_dir")
+	dir = strings.TrimSpace(dir)
+	if dir == "" {
+		dir = "/www/wwwroot/ssl-certs"
+	}
+	return dir
+}
+
+func acmeDirectoryURL() string {
+	u, _ := beego.AppConfig.String("acme_directory")
+	return strings.TrimSpace(u)
+}
+
+func acmeContactEmail() string {
+	e, _ := beego.AppConfig.String("acme_email")
+	return strings.TrimSpace(e)
+}
+
+// CertPaths 返回某域名的证书与私钥落盘路径。
+// host 会先做归一化：域名来自数据库，归一化可避免脏数据里的 ../ 之类写法拼出目录外的路径。
+func CertPaths(host string) (certPath, keyPath string) {
+	h := NormalizeHost(host)
+	if h == "" {
+		h = "_invalid"
+	}
+	base := filepath.Join(SSLCertDir(), h)
+	return filepath.Join(base, certFileName), filepath.Join(base, keyFileName)
+}
+
+// ===== ACME 账号 =====
+
+// loadOrCreateAccountKey 读取（或首次生成）ACME 账号私钥。
+// 账号私钥必须持久化：换了 key 等于换账号，历史签发记录和频控额度都会重置。
+func loadOrCreateAccountKey() (crypto.Signer, error) {
+	dir := filepath.Join(SSLCertDir(), acmeAccountDir)
+	path := filepath.Join(dir, acmeAccountKeyFile)
+
+	if raw, err := os.ReadFile(path); err == nil {
+		block, _ := pem.Decode(raw)
+		if block == nil {
+			return nil, fmt.Errorf("账号私钥格式错误: %s", path)
+		}
+		key, err := x509.ParseECPrivateKey(block.Bytes)
+		if err != nil {
+			return nil, fmt.Errorf("解析账号私钥失败: %v", err)
+		}
+		return key, nil
+	}
+
+	if err := os.MkdirAll(dir, 0o700); err != nil {
+		return nil, fmt.Errorf("创建账号目录失败: %v", err)
+	}
+	key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		return nil, fmt.Errorf("生成账号私钥失败: %v", err)
+	}
+	der, err := x509.MarshalECPrivateKey(key)
+	if err != nil {
+		return nil, fmt.Errorf("序列化账号私钥失败: %v", err)
+	}
+	pemBytes := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: der})
+	if err := os.WriteFile(path, pemBytes, 0o600); err != nil {
+		return nil, fmt.Errorf("写入账号私钥失败: %v", err)
+	}
+	return key, nil
+}
+
+// newACMEClient 构造 ACME 客户端并确保账号已注册
+func newACMEClient(ctx context.Context) (*acme.Client, error) {
+	key, err := loadOrCreateAccountKey()
+	if err != nil {
+		return nil, err
+	}
+	client := &acme.Client{
+		Key:          key,
+		DirectoryURL: acmeDirectoryURL(), // 留空则 acme 包默认使用 Let's Encrypt 正式环境
+	}
+
+	acct := &acme.Account{}
+	if email := acmeContactEmail(); email != "" {
+		acct.Contact = []string{"mailto:" + email}
+	}
+	// 已注册过会返回 ErrAccountAlreadyExists，属于正常情况
+	if _, err := client.Register(ctx, acct, acme.AcceptTOS); err != nil && err != acme.ErrAccountAlreadyExists {
+		return nil, fmt.Errorf("注册 ACME 账号失败: %v", err)
+	}
+	return client, nil
+}
+
+// ===== 证书签发 =====
+
+// obtainCertificate 走完整的 HTTP-01 流程拿到证书并落盘，返回证书到期时间。
+func obtainCertificate(ctx context.Context, host string) (time.Time, error) {
+	client, err := newACMEClient(ctx)
+	if err != nil {
+		return time.Time{}, err
+	}
+
+	order, err := client.AuthorizeOrder(ctx, acme.DomainIDs(host))
+	if err != nil {
+		return time.Time{}, fmt.Errorf("创建证书订单失败: %v", err)
+	}
+
+	// 逐个完成 pending 的授权
+	for _, authzURL := range order.AuthzURLs {
+		authz, err := client.GetAuthorization(ctx, authzURL)
+		if err != nil {
+			return time.Time{}, fmt.Errorf("获取授权信息失败: %v", err)
+		}
+		if authz.Status != acme.StatusPending {
+			continue
+		}
+
+		var chal *acme.Challenge
+		for _, c := range authz.Challenges {
+			if c.Type == "http-01" {
+				chal = c
+				break
+			}
+		}
+		if chal == nil {
+			return time.Time{}, fmt.Errorf("证书颁发机构未提供 http-01 验证方式")
+		}
+
+		keyAuth, err := client.HTTP01ChallengeResponse(chal.Token)
+		if err != nil {
+			return time.Time{}, fmt.Errorf("生成验证响应失败: %v", err)
+		}
+		putHTTP01Challenge(chal.Token, keyAuth)
+
+		if _, err := client.Accept(ctx, chal); err != nil {
+			deleteHTTP01Challenge(chal.Token)
+			return time.Time{}, fmt.Errorf("提交验证失败: %v", err)
+		}
+		_, err = client.WaitAuthorization(ctx, authz.URI)
+		deleteHTTP01Challenge(chal.Token)
+		if err != nil {
+			return time.Time{}, fmt.Errorf("域名验证未通过（请确认 80 端口可从公网访问且未强制跳转 HTTPS）: %v", err)
+		}
+	}
+
+	if _, err := client.WaitOrder(ctx, order.URI); err != nil {
+		return time.Time{}, fmt.Errorf("订单未就绪: %v", err)
+	}
+
+	// 生成证书私钥与 CSR
+	certKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("生成证书私钥失败: %v", err)
+	}
+	csrDER, err := x509.CreateCertificateRequest(rand.Reader, &x509.CertificateRequest{
+		Subject:  pkix.Name{CommonName: host},
+		DNSNames: []string{host},
+	}, certKey)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("生成 CSR 失败: %v", err)
+	}
+
+	chainDER, _, err := client.CreateOrderCert(ctx, order.FinalizeURL, csrDER, true)
+	if err != nil {
+		return time.Time{}, fmt.Errorf("签发证书失败: %v", err)
+	}
+	if len(chainDER) == 0 {
+		return time.Time{}, fmt.Errorf("证书颁发机构返回了空证书链")
+	}
+
+	leaf, err := x509.ParseCertificate(chainDER[0])
+	if err != nil {
+		return time.Time{}, fmt.Errorf("解析证书失败: %v", err)
+	}
+
+	if err := writeCertFiles(host, chainDER, certKey); err != nil {
+		return time.Time{}, err
+	}
+	return leaf.NotAfter, nil
+}
+
+// writeCertFiles 把证书链与私钥写入 {ssl_cert_dir}/{host}/。
+// 先写临时文件再 rename，避免 nginx 读到写了一半的文件。
+func writeCertFiles(host string, chainDER [][]byte, key *ecdsa.PrivateKey) error {
+	certPath, keyPath := CertPaths(host)
+	dir := filepath.Dir(certPath)
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return fmt.Errorf("创建证书目录失败: %v", err)
+	}
+
+	var chainPEM strings.Builder
+	for _, der := range chainDER {
+		if err := pem.Encode(&chainPEM, &pem.Block{Type: "CERTIFICATE", Bytes: der}); err != nil {
+			return fmt.Errorf("编码证书失败: %v", err)
+		}
+	}
+	if err := writeFileAtomic(certPath, []byte(chainPEM.String()), 0o644); err != nil {
+		return fmt.Errorf("写入证书失败: %v", err)
+	}
+
+	keyDER, err := x509.MarshalECPrivateKey(key)
+	if err != nil {
+		return fmt.Errorf("序列化证书私钥失败: %v", err)
+	}
+	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "EC PRIVATE KEY", Bytes: keyDER})
+	if err := writeFileAtomic(keyPath, keyPEM, 0o600); err != nil {
+		return fmt.Errorf("写入证书私钥失败: %v", err)
+	}
+	return nil
+}
+
+func writeFileAtomic(path string, data []byte, perm os.FileMode) error {
+	tmp := path + ".tmp"
+	if err := os.WriteFile(tmp, data, perm); err != nil {
+		return err
+	}
+	// Linux 上 rename 覆盖同名文件是原子的，nginx 不会读到半个文件。
+	// Windows 上 rename 到已存在文件会失败，才退回「先删再改名」。
+	if err := os.Rename(tmp, path); err != nil {
+		_ = os.Remove(path)
+		if err2 := os.Rename(tmp, path); err2 != nil {
+			_ = os.Remove(tmp)
+			return err2
+		}
+	}
+	return nil
+}
+
+// ===== 与域名记录联动 =====
+
+// tryLockIssue 抢占某域名的签发权。返回 false 表示正在签发或处于失败冷却期。
+func tryLockIssue(host string) (bool, string) {
+	issueMu.Lock()
+	defer issueMu.Unlock()
+
+	if issuing[host] {
+		return false, "该域名正在签发证书，请稍后查看结果"
+	}
+	if at, ok := lastFailureAt[host]; ok {
+		if wait := issueFailureCooldown - time.Since(at); wait > 0 {
+			return false, fmt.Sprintf("上次签发失败，请在 %d 分钟后重试", int(wait.Minutes())+1)
+		}
+	}
+	issuing[host] = true
+	return true, ""
+}
+
+func unlockIssue(host string, failed bool) {
+	issueMu.Lock()
+	defer issueMu.Unlock()
+	delete(issuing, host)
+	if failed {
+		lastFailureAt[host] = time.Now()
+	} else {
+		delete(lastFailureAt, host)
+	}
+}
+
+// IssueCertificateAsync 异步为域名记录签发证书。
+// 立即返回；成功后把记录置为 ssl_status=2 且 status=1（已生效）。
+// 返回 false 表示当前不可发起（正在签发或冷却中），第二个返回值为原因。
+func IssueCertificateAsync(domainID uint64, host string) (bool, string) {
+	host = NormalizeHost(host)
+	if host == "" {
+		return false, "域名格式不正确"
+	}
+	ok, reason := tryLockIssue(host)
+	if !ok {
+		return false, reason
+	}
+
+	updateSSLState(domainID, models.SSLStatusIssuing, nil, nil)
+
+	go func() {
+		ctx, cancel := context.WithTimeout(context.Background(), issueTimeout)
+		defer cancel()
+
+		expireAt, err := obtainCertificate(ctx, host)
+		if err != nil {
+			logs.Error("[acme] 签发证书失败 host=%s: %v", host, err)
+			msg := err.Error()
+			updateSSLState(domainID, models.SSLStatusFailed, nil, &msg)
+			unlockIssue(host, true)
+			return
+		}
+
+		logs.Info("[acme] 签发证书成功 host=%s 到期=%s", host, expireAt.Format("2006-01-02"))
+		updateSSLState(domainID, models.SSLStatusIssued, &expireAt, nil)
+		// 证书就绪，域名正式生效。
+		// 只把「待生效(0)」推到「已生效(1)」：被平台禁用(2)的记录不能靠续期自己复活。
+		now := time.Now()
+		if _, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+			Filter("id", domainID).
+			Filter("status", 0).
+			Filter("delete_time__isnull", true).
+			Update(map[string]interface{}{"status": 1, "update_time": now}); err != nil {
+			logs.Error("[acme] 更新域名生效状态失败 id=%d: %v", domainID, err)
+		}
+		unlockIssue(host, false)
+	}()
+
+	return true, ""
+}
+
+// updateSSLState 更新证书状态字段。
+// 注意：beego ORM 的 Update 会对参数做 reflect 解引用，直接塞 nil 的 *string 会 panic，
+// 因此这里统一转成空字符串 / 显式值。
+func updateSSLState(domainID uint64, sslStatus int, expireAt *time.Time, errMsg *string) {
+	msg := ""
+	if errMsg != nil {
+		msg = *errMsg
+		// ssl_error 字段 varchar(500)，超长会被 MySQL 严格模式拒绝
+		if len(msg) > 480 {
+			msg = msg[:480]
+		}
+	}
+	values := map[string]interface{}{
+		"ssl_status":  sslStatus,
+		"ssl_error":   msg,
+		"update_time": time.Now(),
+	}
+	if expireAt != nil {
+		values["ssl_expire_at"] = *expireAt
+	}
+	if _, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("id", domainID).
+		Filter("delete_time__isnull", true).
+		Update(values); err != nil {
+		logs.Error("[acme] 更新证书状态失败 id=%d: %v", domainID, err)
+	}
+}
+
+// ===== 续期调度 =====
+
+// StartCertRenewScheduler 启动证书续期调度：启动 1 分钟后跑一次，之后每 12 小时扫一次。
+func StartCertRenewScheduler(stopChan chan struct{}) {
+	go func() {
+		// 启动稍等，避开数据库初始化与首屏请求高峰
+		firstRun := time.NewTimer(1 * time.Minute)
+		defer firstRun.Stop()
+		select {
+		case <-firstRun.C:
+			renewExpiringCertificates()
+		case <-stopChan:
+			return
+		}
+
+		ticker := time.NewTicker(12 * time.Hour)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				renewExpiringCertificates()
+			case <-stopChan:
+				return
+			}
+		}
+	}()
+}
+
+// renewExpiringCertificates 扫描自有域名，为「即将到期」「证书文件缺失」「之前失败」的记录重新签发。
+// 已生效域名续期失败不会下线站点，只写 ssl_error 等下一轮重试。
+func renewExpiringCertificates() {
+	var rows []models.SystemTenantDomain
+	_, err := models.Orm.QueryTable(new(models.SystemTenantDomain)).
+		Filter("domain_type", models.DomainTypeCustom).
+		Filter("delete_time__isnull", true).
+		Exclude("status", 2). // 已禁用的不续
+		All(&rows)
+	if err != nil {
+		logs.Error("[acme] 扫描待续期域名失败: %v", err)
+		return
+	}
+
+	deadline := time.Now().AddDate(0, 0, renewBeforeDays)
+	for i := range rows {
+		row := rows[i]
+		if row.FullDomain == nil || *row.FullDomain == "" {
+			continue
+		}
+		// DNS 还没通过的不去打 CA，避免浪费频控额度
+		if row.VerifyStatus != models.VerifyStatusPassed {
+			continue
+		}
+		if !needsRenew(row, deadline) {
+			continue
+		}
+		if ok, reason := IssueCertificateAsync(row.ID, *row.FullDomain); !ok {
+			logs.Info("[acme] 跳过续期 host=%s: %s", *row.FullDomain, reason)
+		}
+	}
+}
+
+// needsRenew 判断一条记录是否需要（重新）签发
+func needsRenew(row models.SystemTenantDomain, deadline time.Time) bool {
+	if row.SSLStatus == models.SSLStatusIssuing {
+		return false
+	}
+	if row.SSLStatus != models.SSLStatusIssued {
+		// 待处理或曾失败：重试（失败冷却由 tryLockIssue 兜住）
+		return true
+	}
+	// 证书文件被误删也要补签
+	certPath, keyPath := CertPaths(*row.FullDomain)
+	if !fileExists(certPath) || !fileExists(keyPath) {
+		return true
+	}
+	return row.SSLExpireAt == nil || row.SSLExpireAt.Before(deadline)
+}
+
+func fileExists(path string) bool {
+	info, err := os.Stat(path)
+	return err == nil && !info.IsDir()
+}
diff --git a/go/services/domain_verify.go b/go/services/domain_verify.go
new file mode 100644
index 0000000..c2d5e60
--- /dev/null
+++ b/go/services/domain_verify.go
@@ -0,0 +1,159 @@
+package services
+
+import (
+	"fmt"
+	"net"
+	"regexp"
+	"strings"
+
+	beego "github.com/beego/beego/v2/server/web"
+)
+
+// hostnameRe 合法主机名：多段标签，每段字母数字或连字符，末段为字母（顶级域）
+var hostnameRe = regexp.MustCompile(`^([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z]{2,}$`)
+
+// NormalizeHost 归一化用户输入的域名：去协议、去路径、去端口、去尾点、转小写。
+// 返回空字符串表示输入不是合法主机名。
+func NormalizeHost(raw string) string {
+	h := strings.TrimSpace(strings.ToLower(raw))
+	if h == "" {
+		return ""
+	}
+	// 去掉协议前缀
+	if idx := strings.Index(h, "://"); idx >= 0 {
+		h = h[idx+3:]
+	}
+	// 去掉路径与查询
+	if idx := strings.IndexAny(h, "/?#"); idx >= 0 {
+		h = h[:idx]
+	}
+	// 去掉可能的 user@ 前缀
+	if idx := strings.LastIndex(h, "@"); idx >= 0 {
+		h = h[idx+1:]
+	}
+	// 去掉端口
+	if idx := strings.Index(h, ":"); idx >= 0 {
+		h = h[:idx]
+	}
+	// 去掉 FQDN 末尾的点
+	h = strings.TrimSuffix(h, ".")
+	// 去掉通配符写法
+	h = strings.TrimPrefix(h, "*.")
+
+	if len(h) > 253 || !hostnameRe.MatchString(h) {
+		return ""
+	}
+	return h
+}
+
+// CustomDomainGuide 自有域名的解析配置指引，供前端展示。
+type CustomDomainGuide struct {
+	CnameTarget string   `json:"cname_target"`
+	AIPs        []string `json:"a_ips"`
+}
+
+// GetCustomDomainGuide 读取配置中的 CNAME 目标与 A 记录 IP。
+func GetCustomDomainGuide() CustomDomainGuide {
+	target, _ := beego.AppConfig.String("customdomain_cname_target")
+	target = NormalizeHost(target)
+
+	ipsRaw, _ := beego.AppConfig.String("customdomain_a_ips")
+	ips := make([]string, 0, 2)
+	for _, item := range strings.Split(ipsRaw, ",") {
+		item = strings.TrimSpace(item)
+		if item == "" {
+			continue
+		}
+		if net.ParseIP(item) == nil {
+			continue
+		}
+		ips = append(ips, item)
+	}
+	return CustomDomainGuide{CnameTarget: target, AIPs: ips}
+}
+
+// VerifyCustomDomainDNS 检测域名是否已解析到本平台。
+// 命中任一条件即通过：
+//  1. CNAME 链最终指向配置的 cname_target（或其本身）；
+//  2. A/AAAA 记录中出现配置的任一 IP；
+//  3. cname_target 自身解析出的 IP 与域名解析出的 IP 有交集（兼容 CNAME 被 DNS 服务商拍平的情况）。
+//
+// 返回 (是否通过, 说明文案)。说明文案会写入 verify_msg 展示给租户。
+func VerifyCustomDomainDNS(host string) (bool, string) {
+	host = NormalizeHost(host)
+	if host == "" {
+		return false, "域名格式不正确"
+	}
+
+	guide := GetCustomDomainGuide()
+	if guide.CnameTarget == "" && len(guide.AIPs) == 0 {
+		return false, "平台尚未配置解析目标（customdomain_cname_target / customdomain_a_ips），请联系平台管理员"
+	}
+
+	// 1. CNAME 校验
+	if guide.CnameTarget != "" {
+		if cname, err := net.LookupCNAME(host); err == nil {
+			actual := NormalizeHost(cname)
+			if actual != "" && actual != host && actual == guide.CnameTarget {
+				return true, "CNAME 已指向 " + guide.CnameTarget
+			}
+		}
+	}
+
+	// 2/3. 解析出的 IP 与允许列表或 cname_target 的 IP 比对
+	addrs, err := net.LookupHost(host)
+	if err != nil {
+		return false, "域名无法解析，请确认解析记录已添加并等待生效：" + trimDNSError(err)
+	}
+	if len(addrs) == 0 {
+		return false, "域名未解析到任何 IP，请确认解析记录已添加并等待生效"
+	}
+
+	got := make(map[string]bool, len(addrs))
+	for _, a := range addrs {
+		got[a] = true
+	}
+
+	for _, want := range guide.AIPs {
+		if got[want] {
+			return true, "解析已指向 " + want
+		}
+	}
+
+	if guide.CnameTarget != "" {
+		if targetAddrs, err := net.LookupHost(guide.CnameTarget); err == nil {
+			for _, want := range targetAddrs {
+				if got[want] {
+					return true, "解析已指向平台服务器（" + want + "）"
+				}
+			}
+		}
+	}
+
+	expect := describeExpectedTarget(guide)
+	return false, fmt.Sprintf("当前解析到 %s，与平台地址不一致。%s", strings.Join(addrs, ", "), expect)
+}
+
+// describeExpectedTarget 生成「应该怎么配」的提示文案
+func describeExpectedTarget(guide CustomDomainGuide) string {
+	parts := make([]string, 0, 2)
+	if guide.CnameTarget != "" {
+		parts = append(parts, "子域名请添加 CNAME 记录指向 "+guide.CnameTarget)
+	}
+	if len(guide.AIPs) > 0 {
+		parts = append(parts, "根域名请添加 A 记录指向 "+strings.Join(guide.AIPs, " 或 "))
+	}
+	if len(parts) == 0 {
+		return ""
+	}
+	return strings.Join(parts, "；") + "。"
+}
+
+// trimDNSError 精简 DNS 错误信息，避免把内部解析器地址写进给租户看的文案
+func trimDNSError(err error) string {
+	msg := err.Error()
+	if idx := strings.LastIndex(msg, ": "); idx >= 0 && idx+2 < len(msg) {
+		msg = msg[idx+2:]
+	}
+	return msg
+}
diff --git a/go/services/domain_verify_test.go b/go/services/domain_verify_test.go
new file mode 100644
index 0000000..da72452
--- /dev/null
+++ b/go/services/domain_verify_test.go
@@ -0,0 +1,321 @@
+package services
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	beego "github.com/beego/beego/v2/server/web"
+)
+
+// TestNormalizeHost 覆盖用户在绑定框里可能输入的各种写法。
+// 归一化结果直接写进 yz_system_tenant_domain.full_domain，
+// 而官网渲染是按 Host 精确等值查这张表，所以这里一旦放宽就会出现「绑了但打不开」。
+func TestNormalizeHost(t *testing.T) {
+	cases := []struct {
+		name string
+		in   string
+		want string
+	}{
+		{"普通子域名", "www.example.com", "www.example.com"},
+		{"大写转小写", "WWW.Example.COM", "www.example.com"},
+		{"两端空格", "  www.example.com  ", "www.example.com"},
+		{"带 http 协议", "http://www.example.com", "www.example.com"},
+		{"带 https 与路径", "https://www.example.com/news/1", "www.example.com"},
+		{"带端口", "www.example.com:8080", "www.example.com"},
+		{"带协议端口路径", "https://www.example.com:443/a/b?c=1", "www.example.com"},
+		{"FQDN 末尾点", "www.example.com.", "www.example.com"},
+		{"通配符写法", "*.example.com", "example.com"},
+		{"根域名", "example.com", "example.com"},
+		{"多级子域名", "a.b.c.example.com", "a.b.c.example.com"},
+		{"含连字符", "my-site.example.com", "my-site.example.com"},
+		{"新顶级域", "example.technology", "example.technology"},
+
+		{"空字符串", "", ""},
+		{"纯空格", "   ", ""},
+		{"无顶级域", "localhost", ""},
+		{"纯 IP", "1.2.3.4", ""},
+		{"顶级域含数字", "example.c0m", ""},
+		{"标签以连字符开头", "-bad.example.com", ""},
+		{"标签以连字符结尾", "bad-.example.com", ""},
+		{"含下划线", "bad_name.example.com", ""},
+		{"连续点", "www..example.com", ""},
+		{"以点开头", ".example.com", ""},
+		{"含空格", "www .example.com", ""},
+		{"路径穿越写法", "../../etc/passwd", ""},
+		{"单标签顶级域太短", "example.c", ""},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			if got := NormalizeHost(c.in); got != c.want {
+				t.Errorf("NormalizeHost(%q) = %q, 期望 %q", c.in, got, c.want)
+			}
+		})
+	}
+}
+
+// TestNormalizeHostTooLong 超过 253 字节的主机名不合法，必须拒绝。
+func TestNormalizeHostTooLong(t *testing.T) {
+	long := strings.Repeat("a.", 130) + "com" // 远超 253
+	if got := NormalizeHost(long); got != "" {
+		t.Errorf("超长域名应被拒绝，实际返回 %q", got)
+	}
+}
+
+// TestCertPathsStaysInsideCertDir 证书目录名来自数据库里的域名，
+// 必须保证拼出来的路径落在 ssl_cert_dir 内，不能被 ../ 之类的脏数据带出去。
+func TestCertPathsStaysInsideCertDir(t *testing.T) {
+	root := filepath.Clean(SSLCertDir())
+
+	for _, host := range []string{
+		"www.example.com",
+		"../../etc/ssl",
+		"..",
+		"",
+		"/absolute/path",
+	} {
+		certPath, keyPath := CertPaths(host)
+		for _, p := range []string{certPath, keyPath} {
+			cleaned := filepath.Clean(p)
+			if !strings.HasPrefix(cleaned, root+string(filepath.Separator)) {
+				t.Errorf("host=%q 生成的路径 %q 逃出了证书目录 %q", host, cleaned, root)
+			}
+		}
+	}
+}
+
+// TestCertPathsFileNames 落盘文件名必须与 Nginx 配置里引用的名字一致。
+func TestCertPathsFileNames(t *testing.T) {
+	certPath, keyPath := CertPaths("www.example.com")
+	if filepath.Base(certPath) != "fullchain.pem" {
+		t.Errorf("证书文件名应为 fullchain.pem，实际 %q", filepath.Base(certPath))
+	}
+	if filepath.Base(keyPath) != "privkey.pem" {
+		t.Errorf("私钥文件名应为 privkey.pem，实际 %q", filepath.Base(keyPath))
+	}
+	if filepath.Base(filepath.Dir(certPath)) != "www.example.com" {
+		t.Errorf("证书应放在以域名命名的目录下，实际 %q", filepath.Dir(certPath))
+	}
+}
+
+// TestVerifyCustomDomainDNSWithoutConfig 平台没配解析目标时，
+// 不能去打 DNS 也不能误判通过，要直接给出「联系管理员」的提示。
+func TestVerifyCustomDomainDNSWithoutConfig(t *testing.T) {
+	// 测试环境没有加载 app.conf，GetCustomDomainGuide 返回空配置
+	guide := GetCustomDomainGuide()
+	if guide.CnameTarget != "" || len(guide.AIPs) > 0 {
+		t.Skip("当前环境读到了解析目标配置，跳过空配置分支")
+	}
+
+	passed, msg := VerifyCustomDomainDNS("www.example.com")
+	if passed {
+		t.Error("平台未配置解析目标时不应判定通过")
+	}
+	if !strings.Contains(msg, "平台管理员") {
+		t.Errorf("提示文案应引导联系平台管理员，实际 %q", msg)
+	}
+}
+
+// TestVerifyCustomDomainDNSRejectsBadHost 非法域名在检测入口就要拦住。
+func TestVerifyCustomDomainDNSRejectsBadHost(t *testing.T) {
+	passed, msg := VerifyCustomDomainDNS("not a domain")
+	if passed {
+		t.Error("非法域名不应判定通过")
+	}
+	if msg == "" {
+		t.Error("非法域名应给出说明文案")
+	}
+}
+
+// withTempCertDir 把 ssl_cert_dir 指到临时目录。
+// 默认值是 /www/wwwroot/ssl-certs，在 Windows 上会落到当前盘根目录，
+// 跑测试不该在仓库外面留文件。
+func withTempCertDir(t *testing.T) string {
+	t.Helper()
+	dir := t.TempDir()
+	old, _ := beego.AppConfig.String("ssl_cert_dir")
+	if err := beego.AppConfig.Set("ssl_cert_dir", dir); err != nil {
+		t.Skipf("当前环境不支持运行时改配置: %v", err)
+	}
+	t.Cleanup(func() {
+		_ = beego.AppConfig.Set("ssl_cert_dir", old)
+	})
+	return dir
+}
+
+// TestChallengeTokenValidation token 会被拼进文件名，
+// 必须先过正则；否则 `../../` 这类 token 能让 Go 读写证书目录外的文件。
+func TestChallengeTokenValidation(t *testing.T) {
+	// 合法：base64url，长度 16-128
+	valid := []string{
+		strings.Repeat("a", 16),
+		strings.Repeat("a", 128),
+		"abcABC012_-abcABC012_-",
+	}
+	for _, tok := range valid {
+		if !challengeTokenRe.MatchString(tok) {
+			t.Errorf("token %q 应被接受", tok)
+		}
+	}
+
+	invalid := []string{
+		"",
+		"short",
+		strings.Repeat("a", 129),
+		"../../etc/passwd",
+		"has/slash1234567890",
+		"has\\backslash12345678",
+		"has.dot1234567890",
+		"has space1234567890",
+	}
+	for _, tok := range invalid {
+		if challengeTokenRe.MatchString(tok) {
+			t.Errorf("token %q 应被拒绝", tok)
+		}
+	}
+}
+
+// TestGetHTTP01ChallengeRejectsBadToken 未命中内存时，
+// 非法 token 不能进到读文件那一步。
+func TestGetHTTP01ChallengeRejectsBadToken(t *testing.T) {
+	if _, ok := GetHTTP01Challenge("../../etc/passwd"); ok {
+		t.Error("非法 token 不应返回内容")
+	}
+	if _, ok := GetHTTP01Challenge(""); ok {
+		t.Error("空 token 不应返回内容")
+	}
+}
+
+// TestChallengeStoreRoundTrip 内存与磁盘两层的存取与删除。
+// 磁盘那层是给「签发进程」与「应答 CA 回访的进程」不是同一个的部署方式兜底的。
+func TestChallengeStoreRoundTrip(t *testing.T) {
+	dir := withTempCertDir(t)
+
+	token := strings.Repeat("t", 32)
+	keyAuth := token + ".someThumbprint"
+
+	putHTTP01Challenge(token, keyAuth)
+	t.Cleanup(func() { deleteHTTP01Challenge(token) })
+
+	got, ok := GetHTTP01Challenge(token)
+	if !ok || got != keyAuth {
+		t.Fatalf("取回的 keyAuth = %q ok=%v，期望 %q true", got, ok, keyAuth)
+	}
+
+	// 磁盘兜底：清掉内存后仍要能读到
+	challengeMu.Lock()
+	delete(challengeStore, token)
+	challengeMu.Unlock()
+
+	fromDisk, ok := GetHTTP01Challenge(token)
+	if !ok || fromDisk != keyAuth {
+		t.Errorf("应能从磁盘读回 keyAuth，实际 %q ok=%v（目录 %s）", fromDisk, ok, dir)
+	}
+
+	deleteHTTP01Challenge(token)
+	if _, ok := GetHTTP01Challenge(token); ok {
+		t.Error("删除后内存与磁盘都不应再返回内容")
+	}
+}
+
+// TestTryLockIssueSerializes 同一域名不能并发签发，
+// 否则会向 CA 重复下单，白白消耗频控额度。
+func TestTryLockIssueSerializes(t *testing.T) {
+	host := "lock-test.example.com"
+	// 清掉可能残留的状态
+	t.Cleanup(func() { unlockIssue(host, false) })
+
+	ok, _ := tryLockIssue(host)
+	if !ok {
+		t.Fatal("首次抢锁应成功")
+	}
+
+	ok2, reason := tryLockIssue(host)
+	if ok2 {
+		t.Error("已在签发中时不应再次拿到锁")
+	}
+	if reason == "" {
+		t.Error("拒绝时应返回原因")
+	}
+
+	unlockIssue(host, false)
+	if ok3, _ := tryLockIssue(host); !ok3 {
+		t.Error("解锁后应能重新抢到")
+	}
+	unlockIssue(host, false)
+}
+
+// TestTryLockIssueCooldown 失败后进入冷却期，避免租户连点把 CA 额度打满。
+func TestTryLockIssueCooldown(t *testing.T) {
+	host := "cooldown-test.example.com"
+	t.Cleanup(func() { unlockIssue(host, false) })
+
+	ok, _ := tryLockIssue(host)
+	if !ok {
+		t.Fatal("首次抢锁应成功")
+	}
+	unlockIssue(host, true) // 标记失败
+
+	ok2, reason := tryLockIssue(host)
+	if ok2 {
+		t.Error("冷却期内不应放行")
+	}
+	if !strings.Contains(reason, "分钟") {
+		t.Errorf("冷却提示应包含等待时间，实际 %q", reason)
+	}
+
+	// 成功一次要把冷却清掉
+	unlockIssue(host, false)
+	if ok3, reason3 := tryLockIssue(host); !ok3 {
+		t.Errorf("成功后应清除冷却，实际被拒: %s", reason3)
+	}
+	unlockIssue(host, false)
+}
+
+// TestIssueCertificateAsyncRejectsBadHost 非法域名不该发起签发流程。
+func TestIssueCertificateAsyncRejectsBadHost(t *testing.T) {
+	if ok, _ := IssueCertificateAsync(0, "not a domain"); ok {
+		t.Error("非法域名不应发起签发")
+	}
+	if ok, _ := IssueCertificateAsync(0, ""); ok {
+		t.Error("空域名不应发起签发")
+	}
+}
+
+// TestGetCustomDomainGuideParsing 配置里的 A 记录是逗号分隔的自由文本，
+// 非法 IP 必须被丢掉，否则会把错误的地址当成期望值展示给租户。
+func TestGetCustomDomainGuideParsing(t *testing.T) {
+	restore := func(key, val string) {
+		if err := beego.AppConfig.Set(key, val); err != nil {
+			t.Fatalf("恢复配置 %s 失败: %v", key, err)
+		}
+	}
+	oldTarget, _ := beego.AppConfig.String("customdomain_cname_target")
+	oldIPs, _ := beego.AppConfig.String("customdomain_a_ips")
+	t.Cleanup(func() {
+		restore("customdomain_cname_target", oldTarget)
+		restore("customdomain_a_ips", oldIPs)
+	})
+
+	if err := beego.AppConfig.Set("customdomain_cname_target", " Sites.Example.COM. "); err != nil {
+		t.Skipf("当前环境不支持运行时改配置: %v", err)
+	}
+	if err := beego.AppConfig.Set("customdomain_a_ips", "1.2.3.4, , not-an-ip ,5.6.7.8,999.1.1.1"); err != nil {
+		t.Skipf("当前环境不支持运行时改配置: %v", err)
+	}
+
+	guide := GetCustomDomainGuide()
+	if guide.CnameTarget != "sites.example.com" {
+		t.Errorf("CNAME 目标应被归一化为 sites.example.com，实际 %q", guide.CnameTarget)
+	}
+	want := []string{"1.2.3.4", "5.6.7.8"}
+	if len(guide.AIPs) != len(want) {
+		t.Fatalf("应只保留 %d 个合法 IP，实际 %v", len(want), guide.AIPs)
+	}
+	for i := range want {
+		if guide.AIPs[i] != want[i] {
+			t.Errorf("第 %d 个 IP = %q，期望 %q", i, guide.AIPs[i], want[i])
+		}
+	}
+}
diff --git a/platform/src/api/domain.js b/platform/src/api/domain.js
index 08d4c3a..6e69f6b 100644
--- a/platform/src/api/domain.js
+++ b/platform/src/api/domain.js
@@ -83,6 +83,32 @@ export function applyTenantDomain(data) {
   })
 }
 
+// 绑定自有域名（提交后需按提示配置解析，再调 checkCustomDns）
+export function bindCustomDomain(data) {
+  return request({
+    url: '/platform/domain/tenant/bindCustom',
+    method: 'post',
+    data
+  })
+}
+
+// 检测自有域名解析，通过后后端自动申请 HTTPS 证书
+export function checkCustomDomainDns(id) {
+  return request({
+    url: '/platform/domain/tenant/checkCustomDns',
+    method: 'post',
+    data: { id }
+  })
+}
+
+// 获取自有域名解析配置指引（CNAME 目标 / A 记录 IP）
+export function getCustomDomainGuide() {
+  return request({
+    url: '/platform/domain/tenant/customDomainGuide',
+    method: 'get'
+  })
+}
+
 // 审核租户域名
 export function auditTenantDomain(data) {
   return request({
diff --git a/platform/src/views/apps/cms/domain/audit.vue b/platform/src/views/apps/cms/domain/audit.vue
index 918193f..5e921d2 100644
--- a/platform/src/views/apps/cms/domain/audit.vue
+++ b/platform/src/views/apps/cms/domain/audit.vue
@@ -14,13 +14,17 @@
     <div class="search-box">
       <el-input
         v-model="searchForm.sub_domain"
-        placeholder="搜索二级域名"
+        placeholder="搜索二级前缀或完整域名"
         clearable
-        style="width: 200px; margin-right: 10px;"
+        style="width: 220px; margin-right: 10px;"
         @keyup.enter="handleSearch"
       />
+      <el-select v-model="searchForm.domain_type" placeholder="类型" clearable style="width: 150px; margin-right: 10px;">
+        <el-option label="平台二级域名" :value="1" />
+        <el-option label="自有域名" :value="2" />
+      </el-select>
       <el-select v-model="searchForm.status" placeholder="状态" clearable style="width: 120px; margin-right: 10px;">
-        <el-option label="审核中" :value="0" />
+        <el-option label="待生效/审核中" :value="0" />
         <el-option label="已生效" :value="1" />
         <el-option label="已禁用" :value="2" />
       </el-select>
@@ -37,20 +41,63 @@
     >
       <el-table-column type="index" label="序号" width="60" align="center" />
       <el-table-column prop="tenant_name" label="租户名称" min-width="150" />
-      <el-table-column prop="sub_domain" label="二级域名前缀" width="150" />
-      <el-table-column prop="main_domain" label="主域名" min-width="150" />
-      <el-table-column prop="full_domain" label="完整域名" min-width="200" />
-      <el-table-column prop="status" label="状态" width="100" align="center">
+      <el-table-column label="类型" width="130" align="center">
         <template #default="scope">
-          <el-tag v-if="scope.row.status === 0" type="warning">审核中</el-tag>
-          <el-tag v-else-if="scope.row.status === 1" type="success">已生效</el-tag>
-          <el-tag v-else type="danger">已禁用</el-tag>
+          <el-tag v-if="isCustom(scope.row)" type="warning">自有域名</el-tag>
+          <el-tag v-else type="info">平台二级域名</el-tag>
         </template>
       </el-table-column>
-      <el-table-column prop="create_time" label="申请时间" width="180" />
-      <el-table-column label="操作" width="200" fixed="right" align="center">
+      <el-table-column prop="full_domain" label="完整域名" min-width="200" />
+      <el-table-column prop="status" label="状态" width="120" align="center">
         <template #default="scope">
-          <template v-if="scope.row.status === 0">
+          <el-tag v-if="scope.row.status === 1" type="success">已生效</el-tag>
+          <el-tag v-else-if="scope.row.status === 2" type="danger">已禁用</el-tag>
+          <el-tag v-else type="warning">{{ isCustom(scope.row) ? '待生效' : '审核中' }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="解析检测" width="120" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">—</span>
+          <el-tooltip v-else-if="scope.row.verify_msg" :content="scope.row.verify_msg" placement="top">
+            <el-tag :type="verifyTagType(scope.row.verify_status)">{{ verifyText(scope.row.verify_status) }}</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="verifyTagType(scope.row.verify_status)">{{ verifyText(scope.row.verify_status) }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="HTTPS 证书" width="130" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">平台证书</span>
+          <el-tooltip v-else-if="scope.row.ssl_status === 3 && scope.row.ssl_error" :content="scope.row.ssl_error" placement="top">
+            <el-tag type="danger">签发失败</el-tag>
+          </el-tooltip>
+          <el-tooltip v-else-if="scope.row.ssl_status === 2 && scope.row.ssl_expire_at" :content="'到期时间：' + scope.row.ssl_expire_at" placement="top">
+            <el-tag type="success">已签发</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="sslTagType(scope.row.ssl_status)">{{ sslText(scope.row.ssl_status) }}</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="create_time" label="申请时间" width="170" />
+      <el-table-column label="操作" width="230" fixed="right" align="center">
+        <template #default="scope">
+          <!-- 自有域名无人工审核：解析与证书就绪后自动生效，这里只提供重新检测与禁用 -->
+          <template v-if="isCustom(scope.row)">
+            <el-button
+              size="small"
+              text
+              type="primary"
+              :loading="checkingId === scope.row.id"
+              @click="handleCheckDns(scope.row)"
+            >
+              检测解析
+            </el-button>
+            <el-button v-if="scope.row.status === 1" size="small" text type="danger" @click="handleDisable(scope.row)">
+              禁用
+            </el-button>
+            <el-button v-else-if="scope.row.status === 2" size="small" text type="success" @click="handleEnable(scope.row)">
+              启用
+            </el-button>
+          </template>
+          <template v-else-if="scope.row.status === 0">
             <el-button size="small" type="success" @click="handleAudit(scope.row, 'approve')">
               通过
             </el-button>
@@ -87,13 +134,23 @@
 import { ref, reactive, onMounted } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { Refresh } from '@element-plus/icons-vue'
-import { getTenantDomainList, auditTenantDomain, toggleTenantDomainStatus } from '@/api/domain'
+import {
+  getTenantDomainList,
+  auditTenantDomain,
+  toggleTenantDomainStatus,
+  checkCustomDomainDns
+} from '@/api/domain'
+
+// 域名类型：与后端 models.DomainTypeCustom 对应
+const DOMAIN_TYPE_CUSTOM = 2
 
 const loading = ref(false)
+const checkingId = ref<number | null>(null)
 
 const searchForm = reactive({
   sub_domain: '',
-  status: ''
+  status: '',
+  domain_type: ''
 })
 
 const pagination = reactive({
@@ -104,6 +161,20 @@ const pagination = reactive({
 
 const tableData = ref<any[]>([])
 
+const isCustom = (row: any) => row.domain_type === DOMAIN_TYPE_CUSTOM
+
+const verifyText = (status: number) =>
+  status === 1 ? '已通过' : status === 2 ? '未通过' : '未检测'
+
+const verifyTagType = (status: number) =>
+  status === 1 ? 'success' : status === 2 ? 'danger' : 'info'
+
+const sslText = (status: number) =>
+  status === 2 ? '已签发' : status === 1 ? '签发中' : status === 3 ? '签发失败' : '待处理'
+
+const sslTagType = (status: number) =>
+  status === 2 ? 'success' : status === 1 ? 'warning' : status === 3 ? 'danger' : 'info'
+
 const fetchData = async () => {
   loading.value = true
   try {
@@ -129,7 +200,7 @@ const handleSearch = () => {
 const handleAudit = async (row: any, action: string) => {
   const msg = action === 'approve' ? '确定要通过该域名申请吗？' : '确定要拒绝该域名申请吗？'
   await ElMessageBox.confirm(msg, '提示', { type: 'warning' })
-  
+
   const res = await auditTenantDomain({ id: row.id, action })
   if (res.code === 200) {
     ElMessage.success(res.msg)
@@ -140,8 +211,8 @@ const handleAudit = async (row: any, action: string) => {
 }
 
 const handleDisable = async (row: any) => {
-  await ElMessageBox.confirm('确定要禁用该域名吗？', '提示', { type: 'warning' })
-  
+  await ElMessageBox.confirm('确定要禁用该域名吗？禁用后该域名将无法访问官网。', '提示', { type: 'warning' })
+
   const res = await toggleTenantDomainStatus(row.id)
   if (res.code === 200) {
     ElMessage.success(res.msg)
@@ -151,6 +222,39 @@ const handleDisable = async (row: any) => {
   }
 }
 
+const handleEnable = async (row: any) => {
+  await ElMessageBox.confirm('确定要重新启用该域名吗？', '提示', { type: 'warning' })
+
+  const res = await toggleTenantDomainStatus(row.id)
+  if (res.code === 200) {
+    ElMessage.success(res.msg)
+    fetchData()
+  } else {
+    ElMessage.error(res.msg || '操作失败')
+  }
+}
+
+// 自有域名：重新检测解析，通过后后端自动申请证书
+const handleCheckDns = async (row: any) => {
+  checkingId.value = row.id
+  try {
+    const res = await checkCustomDomainDns(row.id)
+    if (res.code === 200) {
+      const data = res.data || {}
+      if (data.verify_status === 1) {
+        ElMessage.success(data.ssl_message || data.verify_msg || '解析检测通过')
+      } else {
+        ElMessage.warning(data.verify_msg || '解析尚未生效')
+      }
+      fetchData()
+    } else {
+      ElMessage.error(res.msg || '检测失败')
+    }
+  } finally {
+    checkingId.value = null
+  }
+}
+
 onMounted(() => {
   fetchData()
 })
@@ -177,6 +281,10 @@ onMounted(() => {
   margin-bottom: 20px;
 }
 
+.text-muted {
+  color: #999;
+}
+
 .pagination-wrap {
   margin-top: 20px;
   display: flex;
diff --git a/platform/src/views/basicSettings/tenants/domain.vue b/platform/src/views/basicSettings/tenants/domain.vue
index 43d259a..975cd1b 100644
--- a/platform/src/views/basicSettings/tenants/domain.vue
+++ b/platform/src/views/basicSettings/tenants/domain.vue
@@ -1,17 +1,41 @@
 <template>
   <div class="container-box">
     <div class="header-bar">
-      <h2>我的域名</h2>
-      <el-button type="primary" @click="dialogVisible = true">
-        <el-icon><Plus /></el-icon>
-        申请二级域名
-      </el-button>
+      <h2>租户域名</h2>
+      <div class="header-actions">
+        <el-select
+          v-model="currentTid"
+          placeholder="请选择租户"
+          filterable
+          clearable
+          style="width: 240px"
+          @change="fetchDomains"
+        >
+          <el-option
+            v-for="item in tenantOptions"
+            :key="item.id"
+            :label="item.tenant_name || item.tenant_short_name"
+            :value="item.id"
+          />
+        </el-select>
+        <el-button type="primary" :disabled="!currentTid" @click="applyDialogVisible = true">
+          <el-icon><Plus /></el-icon>
+          申请二级域名
+        </el-button>
+        <el-button type="success" :disabled="!currentTid" @click="openBindDialog">
+          <el-icon><Link /></el-icon>
+          绑定自有域名
+        </el-button>
+      </div>
     </div>
 
     <el-divider></el-divider>
 
-    <!-- 我的域名列表 -->
+    <el-empty v-if="!currentTid" description="请先在上方选择要管理的租户" />
+
+    <!-- 该租户的域名列表 -->
     <el-table
+      v-else
       :data="tableData"
       style="width: 100%"
       border
@@ -19,36 +43,85 @@
       element-loading-text="正在加载..."
     >
       <el-table-column type="index" label="序号" width="60" align="center" />
-      <el-table-column prop="sub_domain" label="二级域名前缀" width="150" />
-      <el-table-column prop="main_domain" label="主域名" min-width="150" />
-      <el-table-column prop="full_domain" label="完整域名" min-width="200">
+      <el-table-column label="类型" width="130" align="center">
         <template #default="scope">
-          <el-link
-            type="primary"
-            :href="'http://' + scope.row.full_domain"
-            target="_blank"
-          >
+          <el-tag v-if="isCustom(scope.row)" type="warning">自有域名</el-tag>
+          <el-tag v-else type="info">平台二级域名</el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="full_domain" label="完整域名" min-width="220">
+        <template #default="scope">
+          <el-link type="primary" :href="domainUrl(scope.row)" target="_blank">
             {{ scope.row.full_domain }}
           </el-link>
         </template>
       </el-table-column>
-      <el-table-column prop="status" label="状态" width="100" align="center">
+      <el-table-column prop="status" label="状态" width="110" align="center">
         <template #default="scope">
-          <el-tag v-if="scope.row.status === 0" type="warning">审核中</el-tag>
-          <el-tag v-else-if="scope.row.status === 1" type="success"
-            >已生效</el-tag
-          >
-          <el-tag v-else type="danger">已禁用</el-tag>
+          <el-tag v-if="scope.row.status === 1" type="success">已生效</el-tag>
+          <el-tag v-else-if="scope.row.status === 2" type="danger">已禁用</el-tag>
+          <el-tag v-else type="warning">{{
+            isCustom(scope.row) ? "待生效" : "审核中"
+          }}</el-tag>
         </template>
       </el-table-column>
-      <el-table-column prop="create_time" label="申请时间" width="180" />
-      <el-table-column label="操作" width="180" fixed="right" align="center">
+      <el-table-column label="解析检测" width="120" align="center">
         <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">—</span>
+          <el-tooltip
+            v-else-if="scope.row.verify_msg"
+            :content="scope.row.verify_msg"
+            placement="top"
+          >
+            <el-tag :type="verifyTagType(scope.row.verify_status)">
+              {{ verifyText(scope.row.verify_status) }}
+            </el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="verifyTagType(scope.row.verify_status)">
+            {{ verifyText(scope.row.verify_status) }}
+          </el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="HTTPS 证书" width="130" align="center">
+        <template #default="scope">
+          <span v-if="!isCustom(scope.row)" class="text-muted">平台证书</span>
+          <el-tooltip
+            v-else-if="scope.row.ssl_status === 3 && scope.row.ssl_error"
+            :content="scope.row.ssl_error"
+            placement="top"
+          >
+            <el-tag type="danger">签发失败</el-tag>
+          </el-tooltip>
+          <el-tooltip
+            v-else-if="scope.row.ssl_status === 2 && scope.row.ssl_expire_at"
+            :content="'到期时间：' + scope.row.ssl_expire_at"
+            placement="top"
+          >
+            <el-tag type="success">已签发</el-tag>
+          </el-tooltip>
+          <el-tag v-else :type="sslTagType(scope.row.ssl_status)">
+            {{ sslText(scope.row.ssl_status) }}
+          </el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column prop="create_time" label="申请时间" width="170" />
+      <el-table-column label="操作" width="230" fixed="right" align="center">
+        <template #default="scope">
+          <el-button
+            v-if="isCustom(scope.row)"
+            size="small"
+            text
+            type="primary"
+            :loading="checkingId === scope.row.id"
+            @click="handleCheckDns(scope.row)"
+          >
+            检测解析
+          </el-button>
           <el-button
             size="small"
             text
             type="primary"
-            @click="handleCopy(scope.row.full_domain)"
+            @click="handleCopy(scope.row)"
           >
             复制
           </el-button>
@@ -63,13 +136,17 @@
         </template>
       </el-table-column>
     </el-table>
-
-    <!-- 申请域名弹窗 -->
-    <el-dialog v-model="dialogVisible" title="申请二级域名" width="500px">
-      <el-form :model="form" :rules="rules" ref="formRef" label-width="100px">
+    <!-- 申请二级域名弹窗 -->
+    <el-dialog v-model="applyDialogVisible" title="申请二级域名" width="500px">
+      <el-form
+        :model="applyForm"
+        :rules="applyRules"
+        ref="applyFormRef"
+        label-width="100px"
+      >
         <el-form-item label="选择主域名" prop="main_domain">
           <el-select
-            v-model="form.main_domain"
+            v-model="applyForm.main_domain"
             placeholder="请选择主域名"
             style="width: 100%"
           >
@@ -82,9 +159,12 @@
           </el-select>
         </el-form-item>
         <el-form-item label="二级前缀" prop="sub_domain">
-          <el-input v-model="form.sub_domain" placeholder="请输入二级域名前缀">
+          <el-input
+            v-model="applyForm.sub_domain"
+            placeholder="请输入二级域名前缀"
+          >
             <template #append>{{
-              form.main_domain ? "." + form.main_domain : ""
+              applyForm.main_domain ? "." + applyForm.main_domain : ""
             }}</template>
           </el-input>
           <div class="form-tip">
@@ -94,50 +174,128 @@
         <el-form-item label="预览">
           <div class="domain-preview">
             {{
-              form.sub_domain
-                ? form.sub_domain + "." + (form.main_domain || "example.com")
+              applyForm.sub_domain
+                ? applyForm.sub_domain +
+                  "." +
+                  (applyForm.main_domain || "example.com")
                 : "请填写上方信息"
             }}
           </div>
         </el-form-item>
       </el-form>
       <template #footer>
-        <el-button @click="dialogVisible = false">取消</el-button>
-        <el-button type="primary" @click="handleSubmit" :loading="submitLoading"
+        <el-button @click="applyDialogVisible = false">取消</el-button>
+        <el-button
+          type="primary"
+          @click="handleApplySubmit"
+          :loading="applyLoading"
           >提交申请</el-button
         >
       </template>
     </el-dialog>
+
+    <!-- 绑定自有域名弹窗 -->
+    <el-dialog v-model="bindDialogVisible" title="绑定自有域名" width="620px">
+      <el-form
+        :model="bindForm"
+        :rules="bindRules"
+        ref="bindFormRef"
+        label-width="90px"
+      >
+        <el-form-item label="域名" prop="domain">
+          <el-input
+            v-model="bindForm.domain"
+            placeholder="请输入完整域名，如 www.example.com"
+          />
+          <div class="form-tip">
+            不要带 http:// 与路径。根域名（example.com）与 www
+            视为两个域名，需分别绑定。
+          </div>
+        </el-form-item>
+      </el-form>
+
+      <el-alert type="info" :closable="false" class="guide-box">
+        <template #title>绑定后请让租户到域名服务商处添加解析</template>
+        <div v-if="guide.configured" class="guide-body">
+          <p v-if="guide.cname_target">
+            <strong>子域名（如 www）</strong>：添加 CNAME 记录，记录值
+            <code>{{ guide.cname_target }}</code>
+          </p>
+          <p v-if="guide.a_ips && guide.a_ips.length">
+            <strong>根域名（如 example.com）</strong>：添加 A 记录，记录值
+            <code>{{ guide.a_ips.join(" 或 ") }}</code>
+          </p>
+          <p class="guide-note">
+            解析生效后点击「检测解析」，系统会自动申请 HTTPS
+            证书，签发成功后域名即生效。
+          </p>
+        </div>
+        <div v-else class="guide-body">
+          平台尚未配置解析目标，请先在 app.conf 中填写
+          customdomain_cname_target / customdomain_a_ips。
+        </div>
+      </el-alert>
+
+      <template #footer>
+        <el-button @click="bindDialogVisible = false">取消</el-button>
+        <el-button
+          type="primary"
+          @click="handleBindSubmit"
+          :loading="bindLoading"
+          >确认绑定</el-button
+        >
+      </template>
+    </el-dialog>
   </div>
 </template>
-
 <script lang="ts" setup>
 import { ref, reactive, onMounted } from "vue";
 import { ElMessage, ElMessageBox } from "element-plus";
-import { Plus } from "@element-plus/icons-vue";
+import { Plus, Link } from "@element-plus/icons-vue";
 import {
   getMyDomains,
   applyTenantDomain,
   getEnabledDomains,
   deleteTenantDomain,
+  bindCustomDomain,
+  checkCustomDomainDns,
+  getCustomDomainGuide,
 } from "@/api/domain";
-import { useAuthStore } from "@/stores/auth";
+import { getTenantList } from "@/api/tenant";
+
+// 域名类型：与后端 models.DomainTypeCustom 对应
+const DOMAIN_TYPE_CUSTOM = 2;
 
-const authStore = useAuthStore();
 const loading = ref(false);
-const submitLoading = ref(false);
-const dialogVisible = ref(false);
-const formRef = ref();
+const applyLoading = ref(false);
+const bindLoading = ref(false);
+const checkingId = ref<number | null>(null);
+const applyDialogVisible = ref(false);
+const bindDialogVisible = ref(false);
+const applyFormRef = ref();
+const bindFormRef = ref();
 
+// 平台端账号不归属租户，域名操作必须显式指定租户
+const currentTid = ref<number | null>(null);
+const tenantOptions = ref<any[]>([]);
 const tableData = ref<any[]>([]);
 const domainList = ref<any[]>([]);
+const guide = reactive<{
+  cname_target: string;
+  a_ips: string[];
+  configured: boolean;
+}>({ cname_target: "", a_ips: [], configured: false });
 
-const form = reactive({
+const applyForm = reactive({
   main_domain: "",
   sub_domain: "",
 });
 
-const rules = {
+const bindForm = reactive({
+  domain: "",
+});
+
+const applyRules = {
   main_domain: [{ required: true, message: "请选择主域名", trigger: "change" }],
   sub_domain: [
     { required: true, message: "请输入二级域名前缀", trigger: "blur" },
@@ -149,16 +307,68 @@ const rules = {
   ],
 };
 
+const bindRules = {
+  domain: [
+    { required: true, message: "请输入要绑定的域名", trigger: "blur" },
+    {
+      pattern: /^([a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/,
+      message: "请输入合法的完整域名，如 www.example.com",
+      trigger: "blur",
+    },
+  ],
+};
+
+const isCustom = (row: any) => row.domain_type === DOMAIN_TYPE_CUSTOM;
+
+// 已签发证书的自有域名用 https 打开，其余用 http 避免证书告警
+const domainUrl = (row: any) => {
+  const scheme = !isCustom(row) || row.ssl_status === 2 ? "https" : "http";
+  return `${scheme}://${row.full_domain}`;
+};
+
+const verifyText = (status: number) =>
+  status === 1 ? "已通过" : status === 2 ? "未通过" : "未检测";
+
+const verifyTagType = (status: number) =>
+  status === 1 ? "success" : status === 2 ? "danger" : "info";
+
+const sslText = (status: number) =>
+  status === 2
+    ? "已签发"
+    : status === 1
+    ? "签发中"
+    : status === 3
+    ? "签发失败"
+    : "待处理";
+
+const sslTagType = (status: number) =>
+  status === 2
+    ? "success"
+    : status === 1
+    ? "warning"
+    : status === 3
+    ? "danger"
+    : "info";
+
+const fetchTenants = async () => {
+  const res = await getTenantList({ page: 1, pageSize: 1000 });
+  if (res.code === 200) {
+    tenantOptions.value = res.data?.list || res.data || [];
+  }
+};
+
 const fetchDomains = async () => {
+  if (!currentTid.value) {
+    tableData.value = [];
+    return;
+  }
   loading.value = true;
   try {
-    // 获取我的域名列表
-    const res = await getMyDomains({ tid: authStore.user.tid });
+    const res = await getMyDomains({ tid: currentTid.value });
     if (res.code === 200) {
       tableData.value = res.data || [];
     }
 
-    // 获取可选主域名
     const domainRes = await getEnabledDomains();
     if (domainRes.code === 200) {
       domainList.value = domainRes.data || [];
@@ -168,37 +378,96 @@ const fetchDomains = async () => {
   }
 };
 
-const handleSubmit = async () => {
-  await formRef.value.validate();
-  submitLoading.value = true;
+const fetchGuide = async () => {
+  const res = await getCustomDomainGuide();
+  if (res.code === 200 && res.data) {
+    guide.cname_target = res.data.cname_target || "";
+    guide.a_ips = res.data.a_ips || [];
+    guide.configured = !!res.data.configured;
+  }
+};
+
+const openBindDialog = async () => {
+  bindForm.domain = "";
+  bindDialogVisible.value = true;
+  await fetchGuide();
+};
+
+const handleApplySubmit = async () => {
+  await applyFormRef.value.validate();
+  applyLoading.value = true;
   try {
     const res = await applyTenantDomain({
-      tid: authStore.user.tid,
-      main_domain: form.main_domain,
-      sub_domain: form.sub_domain,
+      tid: currentTid.value,
+      main_domain: applyForm.main_domain,
+      sub_domain: applyForm.sub_domain,
     });
     if (res.code === 200) {
       ElMessage.success(res.msg);
-      dialogVisible.value = false;
-      form.sub_domain = "";
+      applyDialogVisible.value = false;
+      applyForm.sub_domain = "";
       fetchDomains();
     } else {
       ElMessage.error(res.msg || "申请失败");
     }
   } finally {
-    submitLoading.value = false;
+    applyLoading.value = false;
   }
 };
 
-const handleCopy = (domain: string) => {
-  navigator.clipboard.writeText("http://" + domain);
+const handleBindSubmit = async () => {
+  await bindFormRef.value.validate();
+  bindLoading.value = true;
+  try {
+    const res = await bindCustomDomain({
+      tid: currentTid.value,
+      domain: bindForm.domain,
+    });
+    if (res.code === 200) {
+      ElMessage.success(res.msg || "绑定成功");
+      bindDialogVisible.value = false;
+      bindForm.domain = "";
+      fetchDomains();
+    } else {
+      ElMessage.error(res.msg || "绑定失败");
+    }
+  } finally {
+    bindLoading.value = false;
+  }
+};
+
+const handleCheckDns = async (row: any) => {
+  checkingId.value = row.id;
+  try {
+    const res = await checkCustomDomainDns(row.id);
+    if (res.code === 200) {
+      const data = res.data || {};
+      if (data.verify_status === 1) {
+        ElMessage.success(data.ssl_message || data.verify_msg || "解析检测通过");
+      } else {
+        ElMessage.warning(data.verify_msg || "解析尚未生效，请稍后重试");
+      }
+      fetchDomains();
+    } else {
+      ElMessage.error(res.msg || "检测失败");
+    }
+  } finally {
+    checkingId.value = null;
+  }
+};
+
+const handleCopy = (row: any) => {
+  navigator.clipboard.writeText(domainUrl(row));
   ElMessage.success("链接已复制到剪贴板");
 };
 
 const handleDelete = async (row: any) => {
   try {
+    const extra = isCustom(row)
+      ? "删除后该域名将无法访问，已签发的证书也不再续期。"
+      : "";
     await ElMessageBox.confirm(
-      `确定要删除域名 "${row.full_domain}" 吗？`,
+      `确定要删除域名 "${row.full_domain}" 吗？${extra}`,
       "提示",
       {
         confirmButtonText: "确定",
@@ -221,7 +490,8 @@ const handleDelete = async (row: any) => {
 };
 
 onMounted(() => {
-  fetchDomains();
+  fetchTenants();
+  fetchGuide();
 });
 </script>
 
@@ -242,10 +512,17 @@ onMounted(() => {
   }
 }
 
+.header-actions {
+  display: flex;
+  gap: 10px;
+  align-items: center;
+}
+
 .form-tip {
   font-size: 12px;
   color: #999;
   margin-top: 5px;
+  line-height: 1.6;
 }
 
 .domain-preview {
@@ -255,4 +532,34 @@ onMounted(() => {
   font-size: 14px;
   color: #409eff;
 }
+
+.text-muted {
+  color: #999;
+}
+
+.guide-box {
+  margin-top: 4px;
+}
+
+.guide-body {
+  font-size: 13px;
+  line-height: 1.9;
+
+  p {
+    margin: 0;
+  }
+
+  code {
+    padding: 1px 6px;
+    background: #fff;
+    border: 1px solid #dcdfe6;
+    border-radius: 3px;
+    color: #409eff;
+  }
+}
+
+.guide-note {
+  color: #909399;
+}
 </style>
+
diff --git a/sql/alter_tenant_domain_add_custom.sql b/sql/alter_tenant_domain_add_custom.sql
new file mode 100644
index 0000000..6605d63
--- /dev/null
+++ b/sql/alter_tenant_domain_add_custom.sql
@@ -0,0 +1,39 @@
+-- 租户域名表增加「自有域名绑定 + 自动 HTTPS」所需字段（兼容已有数据库）
+-- 已存在字段时请跳过对应 ALTER 语句。
+-- 对应模型：go/models/system_tenant_domain.go
+
+-- 域名类型：1-平台二级域名（历史数据默认值即为 1）2-租户自有域名
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `domain_type` tinyint(1) NOT NULL DEFAULT '1' COMMENT '域名类型 1-平台二级域名 2-自有域名' AFTER `tid`;
+
+-- 证书状态：0-待处理 1-签发中 2-已签发 3-签发失败
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `ssl_status` tinyint(1) NOT NULL DEFAULT '0' COMMENT '证书状态 0-待处理 1-签发中 2-已签发 3-失败' AFTER `status`;
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `ssl_expire_at` datetime DEFAULT NULL COMMENT '证书到期时间' AFTER `ssl_status`;
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `ssl_error` varchar(500) DEFAULT NULL COMMENT '最近一次签发失败原因' AFTER `ssl_expire_at`;
+
+-- DNS 解析校验：0-未检测 1-已通过 2-未通过
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `verify_status` tinyint(1) NOT NULL DEFAULT '0' COMMENT 'DNS校验 0-未检测 1-已通过 2-未通过' AFTER `ssl_error`;
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `verify_msg` varchar(500) DEFAULT NULL COMMENT '最近一次DNS检测说明' AFTER `verify_status`;
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD COLUMN `last_verify_at` datetime DEFAULT NULL COMMENT '最近一次DNS检测时间' AFTER `verify_msg`;
+
+-- 索引：按 Host 查租户是官网渲染的热路径；域名类型用于「同类型只能一条」的判断
+-- 注意：这里用普通索引而非唯一索引，避免历史脏数据（含软删重复域名）导致 ALTER 失败；
+-- 域名唯一性由应用层 bindCustom / apply 接口校验。
+ALTER TABLE `yz_system_tenant_domain`
+  ADD KEY `idx_full_domain` (`full_domain`);
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD KEY `idx_tid_domain_type` (`tid`, `domain_type`);
+
+ALTER TABLE `yz_system_tenant_domain`
+  ADD KEY `idx_ssl_status` (`ssl_status`);