diff --git a/api/scene.js b/api/scene.js
index a7484e9..d0e40aa 100644
--- a/api/scene.js
+++ b/api/scene.js
@@ -1,9 +1,23 @@
 import request from '@/api/http/client'
 
+// 后端就绪后置为 false 即可恢复真实请求。
+const USE_MOCK = true
+
+// 模拟场景列表数据（后端 /scene/list 就绪后删除）。
+const MOCK_SCENES = [
+  { id: 1, name: '家里' },
+  { id: 2, name: '养老院' },
+  { id: 3, name: '社区中心' }
+]
+
 /**
  * 获取场景列表。
  * 约定：data 为数组，每项至少含 { id, name }，多余字段不影响前端。
  */
 export function getSceneList() {
+  if (USE_MOCK) {
+    // 模拟网络延迟，让 loading 态可见。
+    return new Promise((resolve) => setTimeout(() => resolve(MOCK_SCENES), 500))
+  }
   return request.get('/scene/list')
 }
diff --git a/pages/index/index.vue b/pages/index/index.vue
index ff16903..9a45e31 100644
--- a/pages/index/index.vue
+++ b/pages/index/index.vue
@@ -33,8 +33,8 @@
       <up-empty mode="list" text="暂无数据" />
     </view>
 
-    <view class="fab-wrap">
-      <up-button type="success" shape="circle" text="添加设备" @click="goAdd" />
+    <view class="fab-wrap" @click="goAdd">
+      <up-icon name="plus" color="#ffffff" size="28" />
     </view>
   </view>
 </template>
@@ -81,7 +81,6 @@ export default {
 
 .page {
   position: relative;
-  padding-bottom: 180rpx;
 }
 
 .banner {
@@ -153,8 +152,19 @@ export default {
 
 .fab-wrap {
   position: fixed;
-  right: 32rpx;
-  bottom: 220rpx;
-  width: 240rpx;
+  right: 40rpx;
+  bottom: 60rpx;
+  width: 112rpx;
+  height: 112rpx;
+  border-radius: 50%;
+  background: linear-gradient(135deg, #1fca97 0%, #2dbf9c 100%);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: 0 8rpx 24rpx rgba(31, 202, 151, 0.4);
+  /* 点击态缩放反馈 */
+  &:active {
+    transform: scale(0.92);
+  }
 }
 </style>