diff --git a/src/views/cms/SchoolWorkbench.vue b/src/views/cms/SchoolWorkbench.vue
index 3a2e098..d783d8d 100644
--- a/src/views/cms/SchoolWorkbench.vue
+++ b/src/views/cms/SchoolWorkbench.vue
@@ -198,7 +198,7 @@ onMounted(run);
         <div class="wb-body">
             <div class="wb-title">
                 <h3>我的学校</h3>
-                <p class="wb-sub">选择学校进入内容管理；学校与站点由平台管理员在「添加学校」中绑定创建。</p>
+                <p class="wb-sub">选择学校进入内容管理；学校由平台管理员接入，院系子站可在「站点管理」自助创建。</p>
             </div>
 
             <Spin v-if="loading" size="large" fix />
diff --git a/src/views/cms/SiteManage.vue b/src/views/cms/SiteManage.vue
index 6faefaa..c289777 100644
--- a/src/views/cms/SiteManage.vue
+++ b/src/views/cms/SiteManage.vue
@@ -32,6 +32,10 @@ const router = useRouter();
 /** 超管全局视图（工作台入口带入 scope=all） */
 const scopeAll = computed(() => route.query.scope === "all" && store.isSuperAdmin);
 
+/** B1 建站权限拆分：校级（学校上下文内）可自助创建院系子站；超管向导行为不变 */
+const isSchoolAdmin = computed(() => !store.isSuperAdmin && !!store.currentSchool);
+const canCreateSite = computed(() => store.isSuperAdmin || isSchoolAdmin.value);
+
 const rows = ref<SiteVo[]>([]);
 const loading = ref(false);
 const tableHeight = Utils.useTableHeight({ isOperat: true });
@@ -214,8 +218,9 @@ async function save() {
                 id: form.id,
                 code: form.code,
                 parentSiteId: form.parentSiteId || 0,
-                schId: form.schId,
-                schName: form.schName || undefined,
+                // B1：校级角色隐藏学校信息字段，留空由服务端继承主站（防伪造通道）
+                schId: isSchoolAdmin.value ? undefined : form.schId,
+                schName: isSchoolAdmin.value ? undefined : form.schName || undefined,
                 name: form.name,
                 theme: form.theme || undefined,
                 configJson: t ? mergeThemeParamsIntoConfigJson(form.configJson || "", t, themeParams) : form.configJson || undefined,
@@ -285,10 +290,10 @@ watch(() => store.currentSchool?.schId, () => run());
                 <a href="javascript:void(0);" @click="goBackWorkbench">返回学校工作台</a>
             </Alert>
         </div>
-        <div class="fix">
+        <div class="fix" v-if="canCreateSite">
             <Button class="fl" type="primary" size="large" @click="openWizard">
                 <Icon type="ios-add" />
-                新建站点（向导）
+                {{ isSchoolAdmin ? "新建院系子站" : "新建站点（向导）" }}
             </Button>
         </div>
         <Table :columns="columns" :data="rows" :height="tableHeight" :loading="loading" no-data-text="暂无站点" />
@@ -303,15 +308,15 @@ watch(() => store.currentSchool?.schId, () => run());
                     <Input v-model="form.name" :maxlength="128" placeholder="如 XX学校门户网站" />
                 </FormItem>
                 <FormItem label="上级站点">
-                    <Select v-model="form.parentSiteId" clearable placeholder="空=顶层校站点；选主站则为院系子站" style="width: 320px">
+                    <Select v-model="form.parentSiteId" :clearable="!isSchoolAdmin" placeholder="空=顶层校站点；选主站则为院系子站" style="width: 320px">
                         <Option v-for="s in parentOptions" :key="s.id" :value="s.id">{{ s.name }}（{{ s.code }}）</Option>
                     </Select>
-                    <p class="form-tip">院系子站挂在主站下，门户 header 右上出现"专业院系"下拉；层级固定两层。</p>
+                    <p class="form-tip">院系子站挂在主站下，门户 header 右上出现"专业院系"下拉；层级固定两层。{{ isSchoolAdmin ? "校级角色仅可在本校主站之间改挂。" : "" }}</p>
                 </FormItem>
-                <FormItem label="学校ID">
+                <FormItem v-if="store.isSuperAdmin" label="学校ID">
                     <InputNumber v-model="form.schId" :min="1" placeholder="UserBase sys_group.id" style="width: 200px" />
                 </FormItem>
-                <FormItem label="学校名称">
+                <FormItem v-if="store.isSuperAdmin" label="学校名称">
                     <Input v-model="form.schName" :maxlength="128" />
                 </FormItem>
                 <FormItem label="皮肤包">
@@ -340,8 +345,8 @@ watch(() => store.currentSchool?.schId, () => run());
             <ThemePreviewFrame v-if="previewVisible && editTheme" :site-code="form.code" :theme="form.theme" :theme-params="editThemeParams" />
         </Modal>
 
-        <!-- 新建站点三步向导 -->
-        <SiteWizard v-model:visible="wizardVisible" :sites="rows" @created="onWizardCreated" />
+        <!-- 新建站点三步向导（B1：校级锁定为本校主站下建院系子站） -->
+        <SiteWizard v-model:visible="wizardVisible" :sites="rows" :lock-parent-id="isSchoolAdmin ? store.currentSchool?.mainSiteId : undefined" @created="onWizardCreated" />
         </div>
     </div>
 </template>
diff --git a/src/views/cms/SiteWizard.vue b/src/views/cms/SiteWizard.vue
index a13087a..5d247b0 100644
--- a/src/views/cms/SiteWizard.vue
+++ b/src/views/cms/SiteWizard.vue
@@ -17,6 +17,8 @@ import SiteConfigForm from "@/views/cms/components/SiteConfigForm.vue";
 const props = defineProps<{
     visible: boolean;
     sites: SiteVo[];
+    /** B1 建站权限拆分：校级锁定在本校主站下建院系子站（上级禁改、学校信息由服务端继承） */
+    lockParentId?: number;
 }>();
 
 const emit = defineEmits<{
@@ -51,7 +53,12 @@ const canPreview = computed(() => !!sourceSiteCode.value && !!themeName.value);
 const previewTick = ref(0);
 const previewParams = ref<FormModelValue>({});
 
-const parentOptions = computed(() => props.sites.filter(s => !s.parentSiteId));
+/** 锁定模式：上级仅本校主站；否则全部顶层站可选 */
+const parentOptions = computed(() =>
+    props.lockParentId
+        ? props.sites.filter(s => s.id === props.lockParentId && !s.parentSiteId)
+        : props.sites.filter(s => !s.parentSiteId)
+);
 
 function debouncePreview() {
     previewParams.value = { ...themeParams.value };
@@ -71,7 +78,7 @@ watch(
     async v => {
         if (!v) return;
         step.value = 1;
-        Object.assign(form, { code: "", parentSiteId: undefined, schId: undefined, schName: "", name: "", status: 1, configJson: "" });
+        Object.assign(form, { code: "", parentSiteId: props.lockParentId, schId: undefined, schName: "", name: "", status: 1, configJson: "" });
         sourceSiteCode.value = sourceSites.value[0]?.code || "";
         if (!themes.value.length) await loadThemes();
         themeName.value = "default";
@@ -128,8 +135,9 @@ async function createSite() {
             .save({
                 code: form.code,
                 parentSiteId: form.parentSiteId || 0,
-                schId: form.schId,
-                schName: form.schName || undefined,
+                // B1：校级锁定模式学校信息留空，服务端校验后继承主站（防伪造）
+                schId: props.lockParentId ? undefined : form.schId,
+                schName: props.lockParentId ? undefined : form.schName || undefined,
                 name: form.name,
                 theme: themeName.value,
                 configJson,
@@ -148,7 +156,7 @@ async function createSite() {
 <template>
     <Modal
         :model-value="visible"
-        :title="`新建站点向导 · 第 ${step} / 3 步`"
+        :title="`${props.lockParentId ? '新建院系子站' : '新建站点'}向导 · 第 ${step} / 3 步`"
         :mask-closable="false"
         width="980px"
         @update:model-value="emit('update:visible', $event)"
@@ -200,18 +208,19 @@ async function createSite() {
                         <Input v-model="form.name" :maxlength="128" placeholder="如 XX学校门户网站" style="width: 320px" />
                     </FormItem>
                     <FormItem label="上级站点">
-                        <Select v-model="form.parentSiteId" clearable placeholder="空=顶层校站点；选主站则为院系子站" style="width: 320px">
+                        <Select v-model="form.parentSiteId" :disabled="!!props.lockParentId" placeholder="空=顶层校站点；选主站则为院系子站" style="width: 320px">
                             <Option v-for="s in parentOptions" :key="s.id" :value="s.id">{{ s.name }}（{{ s.code }}）</Option>
                         </Select>
+                        <div v-if="props.lockParentId" class="pbu-tip">校级角色仅可在本校主站下创建院系子站，学校信息自动继承主站。</div>
                     </FormItem>
-                    <FormItem label="学校ID">
+                    <FormItem v-if="!props.lockParentId" label="学校ID">
                         <InputNumber v-model="form.schId" :min="1" placeholder="UserBase sys_group.id" style="width: 200px" />
                         <!-- B-8：顶层站 schId 必填（校级角色按此匹配管理权限）；院系子站留空自动继承主站 -->
                         <div class="pbu-tip">
                             顶层站点必填（否则建成即校级角色不可管理）；选了上级站点的院系子站可留空，自动继承主站。
                         </div>
                     </FormItem>
-                    <FormItem label="学校名称">
+                    <FormItem v-if="!props.lockParentId" label="学校名称">
                         <Input v-model="form.schName" :maxlength="128" style="width: 320px" />
                     </FormItem>
                     <FormItem label="状态">