feat(ui): redesign all miniprogram pages

- 全局样式改为粉色(#E6508C)/金色(#DCB982)/绿色(#52c41a)配色
- 所有非tab页使用自定义导航栏，带彩色头部+标题+副标题
- login页: 粉色头部+🌸图标+微信授权登录
- scan页: 粉色头部+虚线扫码框+手动输入按钮
- ble-connect页: 蓝牙提示+搜索中/已发现设备卡片
- bind-success页: 绿色头部+成功图标+7天试用提示卡
- wear-check页: 设备信息行+佩戴指引卡片
- index首页: 粉色设备卡片+开始护理/设备管理按钮
- treatment-setup页: 模式选择+面部地图选区域
- auto-scan页: 面部轮廓+扫描线动画+检测标签
- treating页: 蓝色头部+大倒计时+渐变进度条+放松提示
- treatment-done页: 绿色头部+统计卡片+已记录提示
- subscribe-prompt页: 普通/智能模式对比+试用提示+金色订阅按钮
- subscribe-plans页: 金色头部+服务卡片+月卡/年卡选择
- subscribe-success页: 绿色头部+订阅详情卡+金色按钮
- profile页: 渐变头部+用户行+订阅卡+菜单列表
- history页: 粉色统计行+模式标签记录列表

miniprogram/pages/login/login.wxss

@@ -1,86 +1,54 @@
-.login-page {
-  height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  padding: 0 60rpx;
-  padding-top: 200rpx;
-  padding-bottom: calc(80rpx + env(safe-area-inset-bottom));
-  box-sizing: border-box;
-  background: linear-gradient(180deg, #ffffff 0%, #f5f5f5 100%);
+.page {
+  min-height: 100vh;
+  background: #ffffff;
 }
 
-.logo-area {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-}
-
-.logo-circle {
-  width: 160rpx;
-  height: 160rpx;
-  border-radius: 50%;
-  background-color: #333333;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  margin-bottom: 32rpx;
-}
-
-.logo-text {
-  font-size: 72rpx;
-  color: #ffffff;
-  font-weight: 700;
-}
-
-.app-name {
+.welcome-text {
   font-size: 40rpx;
   font-weight: 600;
   color: #333333;
-  margin-bottom: 12rpx;
-}
-
-.app-desc {
-  font-size: 26rpx;
-  color: #999999;
-}
-
-.btn-area {
-  width: 100%;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  position: fixed;
-  bottom: 0;
-  left: 0;
-  padding: 40rpx 60rpx calc(60rpx + env(safe-area-inset-bottom));
-  box-sizing: border-box;
-  background: linear-gradient(180deg, rgba(245,245,245,0) 0%, #f5f5f5 30%);
-}
-
-.btn-wechat {
-  width: 100%;
-  height: 88rpx;
-  line-height: 88rpx;
-  background-color: #07c160;
-  color: #ffffff;
-  font-size: 32rpx;
-  border-radius: 12rpx;
-  border: none;
-  padding: 0;
-  margin: 0;
   text-align: center;
-  display: flex;
-  align-items: center;
-  justify-content: center;
+  margin-bottom: 40rpx;
 }
 
-.btn-wechat::after {
+.flower-area {
+  text-align: center;
+  padding: 40rpx 0;
+}
+
+.flower {
+  font-size: 140rpx;
+  display: block;
+  margin-bottom: 40rpx;
+}
+
+.desc {
+  color: #666666;
+  font-size: 30rpx;
+  line-height: 1.8;
+}
+
+.login-btn {
+  display: block;
+  width: 100%;
+  padding: 32rpx;
+  background: #E6508C;
+  color: #ffffff;
+  border: none;
+  border-radius: 20rpx;
+  font-size: 32rpx;
+  font-weight: 600;
+  text-align: center;
+  margin-top: 40rpx;
+}
+
+.login-btn::after {
   border: none;
 }
 
 .agreement {
-  font-size: 22rpx;
+  text-align: center;
+  font-size: 24rpx;
   color: #999999;
-  margin-top: 24rpx;
+  margin-top: 32rpx;
 }