diff --git a/src/Oms.Application/Dtos/System/NoticeCreateInput.cs b/src/Oms.Application/Dtos/System/NoticeCreateInput.cs
index f7b4503..c9742ac 100644
--- a/src/Oms.Application/Dtos/System/NoticeCreateInput.cs
+++ b/src/Oms.Application/Dtos/System/NoticeCreateInput.cs
@@ -15,11 +15,10 @@ public class NoticeCreateInput
     public string NoticeType { get; set; } = string.Empty;
 
     /// <summary>
-    /// 标题。
+    /// 标题（公告必填；站内信可空）。
     /// </summary>
-    [Required]
     [StringLength(128)]
-    public string Title { get; set; } = string.Empty;
+    public string? Title { get; set; }
 
     /// <summary>
     /// 正文内容。
diff --git a/src/Oms.Application/Services/Customers/CustomerService.cs b/src/Oms.Application/Services/Customers/CustomerService.cs
index a4c8cb3..5af5acc 100644
--- a/src/Oms.Application/Services/Customers/CustomerService.cs
+++ b/src/Oms.Application/Services/Customers/CustomerService.cs
@@ -227,7 +227,54 @@ public class CustomerService : ApplicationService
     public async Task DeleteAsync(IdInput input)
     {
         var entity = await GetCustomerOrThrowAsync(input.Id);
+
+        if (!entity.ParentCustomerId.HasValue
+            && await CustomerRepository.AnyAsync(x => x.ParentCustomerId == entity.Id))
+        {
+            throw new BusinessException("存在子客户，请先删除子客户");
+        }
+
         await CustomerRepository.DeleteAsync(entity);
+        await DeleteLinkedRbacUserAsync(entity);
+    }
+
+    private async Task DeleteLinkedRbacUserAsync(Customer entity)
+    {
+        var userGuid = await GetRbacUserGuidByMapIdAsync(entity.UserId);
+        if (userGuid.HasValue && userGuid.Value != Guid.Empty)
+        {
+            await UserService.DeleteAsync(userGuid.Value);
+        }
+
+        if (entity.ParentCustomerId.HasValue)
+        {
+            await TryDeleteSubCustomerRoleAsync(entity.UserId);
+        }
+    }
+
+    private async Task<Guid?> GetRbacUserGuidByMapIdAsync(int mapId)
+    {
+        return await RbacDbContext.Database.SqlQuery<Guid?>(
+                $"select `Id` as `Value` from `user` where `userid` = {mapId} and `IsDeleted` = 0")
+            .FirstOrDefaultAsync();
+    }
+
+    private async Task TryDeleteSubCustomerRoleAsync(int userId)
+    {
+        try
+        {
+            var roles = await RoleService.GetAllRolesAsync();
+            var role = roles.FirstOrDefault(x =>
+                string.Equals(x.Code, $"CustomerSub_{userId}", StringComparison.OrdinalIgnoreCase));
+            if (role != null)
+            {
+                await RoleService.DeleteAsync(role.Id);
+            }
+        }
+        catch
+        {
+            // 子客户角色清理失败不阻断客户删除
+        }
     }
 
     /// <summary>
diff --git a/src/Oms.Application/Services/System/NoticeService.cs b/src/Oms.Application/Services/System/NoticeService.cs
index 9393413..5b50b99 100644
--- a/src/Oms.Application/Services/System/NoticeService.cs
+++ b/src/Oms.Application/Services/System/NoticeService.cs
@@ -49,7 +49,17 @@ public class NoticeService : ApplicationService
     [HttpGet("/system/notice/list")]
     public async Task<OmsPageResult<NoticeOutput>> GetListAsync([FromQuery] NoticeListInput input)
     {
-        var predicate = BuildListPredicate(input);
+        var receiverUserId = CurrentUser.GetId<int>();
+        if (receiverUserId <= 0)
+        {
+            return new OmsPageResult<NoticeOutput> { Items = [], Total = 0 };
+        }
+
+        var expectedReceiverType = OmsSessionHelper.IsCustomerLogin(CurrentUser)
+            ? ReceiverTypeCustomer
+            : ReceiverTypeUser;
+
+        var predicate = BuildListPredicate(input, receiverUserId, expectedReceiverType);
         var pageIndex = OmsDocHelper.NormalizePage(input.Page);
         var pageSize = OmsDocHelper.NormalizePageSize(input.PageSize);
         var notices = await NoticeRepository.GetPagedListAsync(
@@ -106,12 +116,13 @@ public class NoticeService : ApplicationService
     [HttpPost("/system/notice/create")]
     public async Task CreateAsync(NoticeCreateInput input)
     {
-        ValidateNoticeText(input.Title, input.Content);
+        var noticeType = NormalizeNoticeType(input.NoticeType);
+        ValidateNoticeText(noticeType, input.Title, input.Content);
         var receiverIds = await NormalizeAndValidateReceiverIdsAsync(input.ReceiverType, input.ReceiverIds);
         await NoticeRepository.InsertAsync(new Notice
         {
-            NoticeType = NormalizeNoticeType(input.NoticeType),
-            Title = input.Title.Trim(),
+            NoticeType = noticeType,
+            Title = NormalizeTitle(input.Title),
             Content = input.Content.Trim(),
             IsPopup = NormalizePopupValue(input.IsPopup),
             ReceiverType = NormalizeReceiverType(input.ReceiverType),
@@ -126,10 +137,11 @@ public class NoticeService : ApplicationService
     public async Task UpdateAsync(NoticeUpdateInput input)
     {
         var entity = await GetNoticeOrThrowAsync(input.Id);
-        ValidateNoticeText(input.Title, input.Content);
+        var noticeType = NormalizeNoticeType(input.NoticeType);
+        ValidateNoticeText(noticeType, input.Title, input.Content);
         var receiverIds = await NormalizeAndValidateReceiverIdsAsync(input.ReceiverType, input.ReceiverIds);
-        entity.NoticeType = NormalizeNoticeType(input.NoticeType);
-        entity.Title = input.Title.Trim();
+        entity.NoticeType = noticeType;
+        entity.Title = NormalizeTitle(input.Title);
         entity.Content = input.Content.Trim();
         entity.IsPopup = NormalizePopupValue(input.IsPopup);
         entity.ReceiverType = NormalizeReceiverType(input.ReceiverType);
@@ -162,7 +174,7 @@ public class NoticeService : ApplicationService
     {
         var notice = await GetNoticeOrThrowAsync(input.Id);
         var receiverIds = OmsDocHelper.DeserializeJson<List<int>>(notice.ReceiverIds) ?? [];
-        var currentReceiverType = ReceiverTypeUser;
+        var currentReceiverType = NormalizeReceiverType(notice.ReceiverType);
         var currentReceiverId = CurrentUser.GetId<int>();
         if (currentReceiverId <= 0)
         {
@@ -314,17 +326,26 @@ public class NoticeService : ApplicationService
         return result;
     }
 
-    private static Expression<Func<Notice, bool>> BuildListPredicate(NoticeListInput input)
+    private static Expression<Func<Notice, bool>> BuildListPredicate(
+        NoticeListInput input,
+        int receiverUserId,
+        string expectedReceiverType)
     {
         var noticeType = input.NoticeType?.Trim();
         var receiverType = input.ReceiverType?.Trim();
         var keyword = input.Keyword?.Trim();
+        var receiverIdToken = receiverUserId.ToString();
         return x =>
             (string.IsNullOrWhiteSpace(noticeType) || x.NoticeType == noticeType) &&
             (string.IsNullOrWhiteSpace(receiverType) || x.ReceiverType == receiverType) &&
             (string.IsNullOrWhiteSpace(keyword) ||
              x.Title.Contains(keyword) ||
-             x.Content.Contains(keyword));
+             x.Content.Contains(keyword)) &&
+            x.ReceiverType == expectedReceiverType &&
+            (x.ReceiverIds == $"[{receiverIdToken}]" ||
+             x.ReceiverIds.StartsWith($"[{receiverIdToken},") ||
+             x.ReceiverIds.Contains($",{receiverIdToken},") ||
+             x.ReceiverIds.EndsWith($",{receiverIdToken}]"));
     }
 
     private async Task<Notice> GetNoticeOrThrowAsync(int id)
@@ -397,9 +418,9 @@ public class NoticeService : ApplicationService
             .ToListAsync();
     }
 
-    private static void ValidateNoticeText(string title, string content)
+    private static void ValidateNoticeText(string noticeType, string? title, string content)
     {
-        if (string.IsNullOrWhiteSpace(title))
+        if (noticeType == NoticeTypeNotice && string.IsNullOrWhiteSpace(title))
         {
             throw new BusinessException("通知标题不能为空");
         }
@@ -410,6 +431,9 @@ public class NoticeService : ApplicationService
         }
     }
 
+    private static string NormalizeTitle(string? title) =>
+        string.IsNullOrWhiteSpace(title) ? string.Empty : title.Trim();
+
     private static NoticeOutput MapNoticeOutput(Notice entity, int readCount, List<int> receiverSelectionIds)
     {
         var receiverIds = OmsDocHelper.DeserializeJson<List<int>>(entity.ReceiverIds) ?? [];