diff --git a/admin/package-lock.json b/admin/package-lock.json
index 74c6947..2a8401e 100644
--- a/admin/package-lock.json
+++ b/admin/package-lock.json
@@ -12,7 +12,8 @@
         "axios": "^1.6.2",
         "element-plus": "^2.4.4",
         "vue": "^3.4.0",
-        "vue-router": "^4.2.5"
+        "vue-router": "^4.2.5",
+        "vuedraggable": "^4.1.0"
       },
       "devDependencies": {
         "@vitejs/plugin-vue": "^4.5.2",
@@ -1585,6 +1586,12 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/sortablejs": {
+      "version": "1.14.0",
+      "resolved": "https://registry.npmjs.org/sortablejs/-/sortablejs-1.14.0.tgz",
+      "integrity": "sha512-pBXvQCs5/33fdN1/39pPL0NZF20LeRbLQ5jtnheIPN9JQAaufGjKdWduZn4U7wCtVuzKhmRkI0DFYHYRbB2H1w==",
+      "license": "MIT"
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -1689,6 +1696,18 @@
       "peerDependencies": {
         "vue": "^3.5.0"
       }
+    },
+    "node_modules/vuedraggable": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/vuedraggable/-/vuedraggable-4.1.0.tgz",
+      "integrity": "sha512-FU5HCWBmsf20GpP3eudURW3WdWTKIbEIQxh9/8GE806hydR9qZqRRxRE3RjqX7PkuLuMQG/A7n3cfj9rCEchww==",
+      "license": "MIT",
+      "dependencies": {
+        "sortablejs": "1.14.0"
+      },
+      "peerDependencies": {
+        "vue": "^3.0.1"
+      }
     }
   }
 }
diff --git a/admin/package.json b/admin/package.json
index ff99822..6d1fca8 100644
--- a/admin/package.json
+++ b/admin/package.json
@@ -9,11 +9,12 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@element-plus/icons-vue": "^2.3.1",
+    "axios": "^1.6.2",
+    "element-plus": "^2.4.4",
     "vue": "^3.4.0",
     "vue-router": "^4.2.5",
-    "element-plus": "^2.4.4",
-    "@element-plus/icons-vue": "^2.3.1",
-    "axios": "^1.6.2"
+    "vuedraggable": "^4.1.0"
   },
   "devDependencies": {
     "@vitejs/plugin-vue": "^4.5.2",
diff --git a/admin/src/components/PageBuilderBlocks.vue b/admin/src/components/PageBuilderBlocks.vue
index 34e3321..cd2d488 100644
--- a/admin/src/components/PageBuilderBlocks.vue
+++ b/admin/src/components/PageBuilderBlocks.vue
@@ -1,14 +1,28 @@
 <template>
   <div class="page-builder-blocks">
-    <div v-for="(block, idx) in modelBlocks" :key="block.id || idx" class="block-card">
-      <div class="block-head">
-        <span class="block-type">{{ typeLabel(block.type) }}</span>
-        <div class="block-actions">
-          <el-button link type="primary" :disabled="idx === 0" @click="move(idx, -1)">上移</el-button>
-          <el-button link type="primary" :disabled="idx >= modelBlocks.length - 1" @click="move(idx, 1)">下移</el-button>
-          <el-button link type="danger" @click="remove(idx)">删除</el-button>
-        </div>
-      </div>
+    <Draggable
+      v-model="blocksWritable"
+      item-key="id"
+      handle=".drag-handle"
+      :animation="220"
+      ghost-class="block-ghost"
+      chosen-class="block-chosen"
+      drag-class="block-dragging"
+      class="blocks-drag-list"
+    >
+      <template #item="{ element: block, index: idx }">
+        <div class="block-card">
+          <div class="block-head">
+            <span class="block-head-left">
+              <span class="drag-handle" title="按住拖拽排序">
+                <el-icon><Rank /></el-icon>
+              </span>
+              <span class="block-type">{{ typeLabel(block.type) }}</span>
+            </span>
+            <div class="block-actions">
+              <el-button link type="danger" @click="remove(idx)">删除</el-button>
+            </div>
+          </div>
 
       <template v-if="block.type === 'heading'">
         <el-form label-width="88px" size="small">
@@ -118,7 +132,9 @@
       <template v-else>
         <span class="muted">未知类型 {{ block.type }}</span>
       </template>
-    </div>
+        </div>
+      </template>
+    </Draggable>
 
     <div class="add-bar">
       <el-dropdown trigger="click" @command="addBlock">
@@ -146,7 +162,8 @@
 
 <script setup>
 import { computed, ref } from 'vue'
-import { ArrowDown } from '@element-plus/icons-vue'
+import { ArrowDown, Rank } from '@element-plus/icons-vue'
+import Draggable from 'vuedraggable'
 import LinkPickerDialog from './LinkPickerDialog.vue'
 import PageBuilderAnimFields from './PageBuilderAnimFields.vue'
 
@@ -158,7 +175,14 @@ const props = defineProps({
 })
 const emit = defineEmits(['update:blocks'])
 
-const modelBlocks = computed(() => props.blocks)
+const blocksWritable = computed({
+  get() {
+    return props.blocks
+  },
+  set(val) {
+    emit('update:blocks', val)
+  }
+})
 
 function typeLabel(t) {
   const m = {
@@ -225,16 +249,6 @@ function remove(idx) {
   emit('update:blocks', list)
 }
 
-function move(idx, delta) {
-  const list = [...props.blocks]
-  const j = idx + delta
-  if (j < 0 || j >= list.length) return
-  const t = list[idx]
-  list[idx] = list[j]
-  list[j] = t
-  emit('update:blocks', list)
-}
-
 const pickerVisible = ref(false)
 const pickTarget = ref(null)
 
@@ -317,4 +331,41 @@ function patchSectionChildren(idx, children) {
   color: #909399;
   font-size: 13px;
 }
+.blocks-drag-list {
+  min-height: 4px;
+}
+.block-head-left {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+}
+.drag-handle {
+  cursor: grab;
+  display: inline-flex;
+  align-items: center;
+  padding: 4px 6px;
+  margin-right: 4px;
+  color: #909399;
+  border-radius: 4px;
+  user-select: none;
+  touch-action: none;
+}
+.drag-handle:hover {
+  color: #409eff;
+  background: #ecf5ff;
+}
+.drag-handle:active {
+  cursor: grabbing;
+}
+:deep(.block-ghost) {
+  opacity: 0.55;
+  background: #ecf5ff !important;
+  border: 1px dashed #409eff !important;
+}
+:deep(.block-chosen) {
+  box-shadow: 0 2px 12px rgba(64, 158, 255, 0.25);
+}
+:deep(.block-dragging) {
+  opacity: 0.95;
+}
 </style>
diff --git a/admin/src/components/PageBuilderEditor.vue b/admin/src/components/PageBuilderEditor.vue
index 917b7cb..6edf251 100644
--- a/admin/src/components/PageBuilderEditor.vue
+++ b/admin/src/components/PageBuilderEditor.vue
@@ -30,7 +30,12 @@ const blocks = ref([])
 const jsonDraft = ref('')
 let syncingFromParent = false
 
+function newBlockId() {
+  return 'b-' + Date.now() + '-' + Math.random().toString(36).slice(2, 10)
+}
+
 function normalizeBlock(b) {
+  if (!b.id) b.id = newBlockId()
   if (!b.props) b.props = {}
   if (!b.animation) b.animation = { enter: 'fadeIn', delay_ms: 0, duration_ms: 600 }
   if (b.type === 'link_list' && !Array.isArray(b.props.items)) b.props.items = []
@@ -86,6 +91,7 @@ function applyJsonDraft() {
     }
     syncingFromParent = true
     blocks.value = JSON.parse(JSON.stringify(j.blocks))
+    blocks.value.forEach(normalizeBlock)
     syncingFromParent = false
     emit('update:modelValue', stringify())
     ElMessage.success('已应用')
diff --git a/docs/PAGE_BUILDER.md b/docs/PAGE_BUILDER.md
index d0c5893..6a6a499 100644
--- a/docs/PAGE_BUILDER.md
+++ b/docs/PAGE_BUILDER.md
@@ -4,7 +4,7 @@
 
 - 在 **网页管理** 中创建页面，设置 **前台路径**（`route_path` 或默认 `/{slug}`）、**发布**、**内容模式**。
 - **HTML**：`content` 为 HTML 字符串，前台用 `v-html` 渲染（仅信任后台内容）。
-- **积木（builder）**：后台使用 **可视化编辑器**（添加模块、拖拽顺序、配置动画）；链接可在弹窗中选择 **站内页面**、**可下载文件** 或 **自定义地址**。亦可展开「高级」直接改 JSON。
+- **积木（builder）**：后台使用 **可视化编辑器**（添加模块、**按住左侧手柄拖拽**调整顺序、配置动画）；链接可在弹窗中选择 **站内页面**、**可下载文件** 或 **自定义地址**。亦可展开「高级」直接改 JSON。
 - 存储仍为 JSON，结构如下，前台按模块渲染并支持入场动画。
 
 ## 动态路由
diff --git a/nginx/README.md b/nginx/README.md
index 2d21d1f..c09921f 100644
--- a/nginx/README.md
+++ b/nginx/README.md
@@ -72,3 +72,10 @@ sudo systemctl start nginx
 ```
 
 然后再按上面步骤创建证书目录、放入证书、复制 conf 并重载。
+
+## 5. 前台动态路由与 404（SPA）
+
+- **现象**：浏览器直接打开 `https://你的域名/some-page` 出现 **nginx** 的 `404 Not Found`（页脚带 `nginx/x.x.x`），而不是网站自己的页面。
+- **原因**：提供静态文件的 `server` 未把「不存在的路径」交给 `index.html`，Nginx 在磁盘上找不到 `some-page` 文件就返回 404。
+- **要求**：托管 **web 前台** 的站点必须使用 **`try_files $uri $uri/ /index.html;`**（见仓库 `nginx/web.conf` 与 `web/Dockerfile` 内嵌配置）。若你自建 Nginx，请对照修改后再 `nginx -t` 并重载。
+- **应用内 404**：在 SPA 已正确回退的前提下，未在后台发布的路径会由前端路由进入 **「页面不存在」** 页（`NotFound.vue`），与上述 nginx 404 不同。
diff --git a/nginx/web.conf b/nginx/web.conf
index 950dd69..439f2f2 100644
--- a/nginx/web.conf
+++ b/nginx/web.conf
@@ -11,6 +11,7 @@ server {
     location = / {
         try_files /index.html =404;
     }
+    # 前台为 Vue SPA：任意路径须回退到 index.html，否则直接访问 /xxx 会得到 nginx 404
     location / {
         try_files $uri $uri/ /index.html;
     }
diff --git a/web/Dockerfile b/web/Dockerfile
index a521460..c8593d3 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -25,6 +25,7 @@ RUN printf '%s\n' \
 '  location = / {' \
 '    try_files /index.html =404;' \
 '  }' \
+'  # SPA: 避免直接访问 /path 时 nginx 404' \
 '  location / {' \
 '    try_files $uri $uri/ /index.html;' \
 '  }' \
diff --git a/web/src/main.js b/web/src/main.js
index abf474d..bdb32f7 100644
--- a/web/src/main.js
+++ b/web/src/main.js
@@ -25,6 +25,13 @@ async function bootstrap() {
   } catch (_) {
     /* 动态路由失败时仍展示首页 */
   }
+  // 通配路由须最后注册，避免盖住已发布的动态页面
+  router.addRoute({
+    path: '/:pathMatch(.*)*',
+    name: 'NotFound',
+    meta: { title: '页面未找到' },
+    component: () => import('./views/NotFound.vue')
+  })
   app.mount('#app')
 }
 
diff --git a/web/src/views/NotFound.vue b/web/src/views/NotFound.vue
new file mode 100644
index 0000000..265dd39
--- /dev/null
+++ b/web/src/views/NotFound.vue
@@ -0,0 +1,76 @@
+<template>
+  <div class="not-found">
+    <div class="not-found-inner">
+      <p class="code">404</p>
+      <h1>页面不存在</h1>
+      <p class="desc">该地址没有对应页面，或页面已下线。请从首页重新进入。</p>
+      <div class="actions">
+        <router-link to="/" class="btn-primary">返回首页</router-link>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { onMounted } from 'vue'
+
+onMounted(() => {
+  document.title = '页面未找到'
+})
+</script>
+
+<style scoped>
+.not-found {
+  min-height: 60vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48px 16px;
+}
+.not-found-inner {
+  text-align: center;
+  max-width: 420px;
+}
+.code {
+  margin: 0;
+  font-size: 4rem;
+  font-weight: 800;
+  line-height: 1;
+  letter-spacing: 0.08em;
+  color: rgba(255, 255, 255, 0.12);
+}
+h1 {
+  margin: 8px 0 16px;
+  font-size: 1.5rem;
+  font-weight: 600;
+  color: #e8e8ef;
+}
+.desc {
+  margin: 0 0 28px;
+  font-size: 0.95rem;
+  line-height: 1.6;
+  color: rgba(255, 255, 255, 0.55);
+}
+.actions {
+  display: flex;
+  justify-content: center;
+  gap: 12px;
+}
+.btn-primary {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 10px 24px;
+  border-radius: 8px;
+  font-size: 0.95rem;
+  font-weight: 500;
+  text-decoration: none;
+  color: #0a0a12;
+  background: linear-gradient(135deg, #7eb8ff 0%, #4d8fff 100%);
+  transition: opacity 0.2s, transform 0.15s;
+}
+.btn-primary:hover {
+  opacity: 0.92;
+  transform: translateY(-1px);
+}
+</style>