diff --git a/src/Api/TakeoutSaaS.AdminApi/Controllers/AuthController.cs b/src/Api/TakeoutSaaS.AdminApi/Controllers/AuthController.cs
index b12135c..22e9048 100644
--- a/src/Api/TakeoutSaaS.AdminApi/Controllers/AuthController.cs
+++ b/src/Api/TakeoutSaaS.AdminApi/Controllers/AuthController.cs
@@ -46,7 +46,7 @@ public sealed class AuthController(IAdminAuthService authService) : BaseApiContr
     [ProducesResponseType(typeof(ApiResponse<TokenResponse>), StatusCodes.Status200OK)]
     public async Task<ApiResponse<TokenResponse>> LoginSimple([FromBody] AdminLoginRequest request, CancellationToken cancellationToken)
     {
-        var response = await authService.LoginAsync(request, cancellationToken);
+        var response = await authService.LoginSimpleAsync(request, cancellationToken);
         return ApiResponse<TokenResponse>.Ok(response);
     }
 
diff --git a/src/Application/TakeoutSaaS.Application/Identity/Abstractions/IAdminAuthService.cs b/src/Application/TakeoutSaaS.Application/Identity/Abstractions/IAdminAuthService.cs
index f49464c..15365df 100644
--- a/src/Application/TakeoutSaaS.Application/Identity/Abstractions/IAdminAuthService.cs
+++ b/src/Application/TakeoutSaaS.Application/Identity/Abstractions/IAdminAuthService.cs
@@ -13,6 +13,11 @@ public interface IAdminAuthService
     /// </summary>
     Task<TokenResponse> LoginAsync(AdminLoginRequest request, CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// 简化登录：支持使用“账号@手机号”自动解析租户后登录。
+    /// </summary>
+    Task<TokenResponse> LoginSimpleAsync(AdminLoginRequest request, CancellationToken cancellationToken = default);
+
     /// <summary>
     /// 刷新 Token。
     /// </summary>
diff --git a/src/Application/TakeoutSaaS.Application/Identity/Services/AdminAuthService.cs b/src/Application/TakeoutSaaS.Application/Identity/Services/AdminAuthService.cs
index 5b00f57..845fd7d 100644
--- a/src/Application/TakeoutSaaS.Application/Identity/Services/AdminAuthService.cs
+++ b/src/Application/TakeoutSaaS.Application/Identity/Services/AdminAuthService.cs
@@ -3,6 +3,7 @@ using TakeoutSaaS.Application.Identity.Abstractions;
 using TakeoutSaaS.Application.Identity.Contracts;
 using TakeoutSaaS.Domain.Identity.Entities;
 using TakeoutSaaS.Domain.Identity.Repositories;
+using TakeoutSaaS.Domain.Tenants.Repositories;
 using TakeoutSaaS.Shared.Abstractions.Constants;
 using TakeoutSaaS.Shared.Abstractions.Exceptions;
 using TakeoutSaaS.Shared.Abstractions.Results;
@@ -23,9 +24,13 @@ public sealed class AdminAuthService(
     IPasswordHasher<IdentityUser> passwordHasher,
     IJwtTokenService jwtTokenService,
     IRefreshTokenStore refreshTokenStore,
-    ITenantProvider tenantProvider) : IAdminAuthService
+    ITenantProvider tenantProvider,
+    ITenantContextAccessor tenantContextAccessor,
+    ITenantRepository tenantRepository) : IAdminAuthService
 {
     private readonly ITenantProvider _tenantProvider = tenantProvider;
+    private readonly ITenantContextAccessor _tenantContextAccessor = tenantContextAccessor;
+    private readonly ITenantRepository _tenantRepository = tenantRepository;
     private readonly IUserRoleRepository _userRoleRepository = userRoleRepository;
     private readonly IRoleRepository _roleRepository = roleRepository;
     private readonly IPermissionRepository _permissionRepository = permissionRepository;
@@ -57,6 +62,60 @@ public sealed class AdminAuthService(
         return await jwtTokenService.CreateTokensAsync(profile, false, cancellationToken);
     }
 
+    /// <summary>
+    /// 简化登录：支持使用“账号@手机号”解析租户后登录。
+    /// </summary>
+    /// <param name="request">登录请求</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <returns>令牌响应</returns>
+    public async Task<TokenResponse> LoginSimpleAsync(AdminLoginRequest request, CancellationToken cancellationToken = default)
+    {
+        // 1. 标准化输入
+        var rawAccount = request.Account?.Trim() ?? string.Empty;
+
+        // 2. 尝试解析 “账号@手机号”
+        var atIndex = rawAccount.LastIndexOf('@');
+        if (atIndex > 0 && atIndex < rawAccount.Length - 1)
+        {
+            var accountPart = rawAccount[..atIndex].Trim();
+            var phonePart = rawAccount[(atIndex + 1)..].Trim();
+
+            if (IsLikelyPhone(phonePart))
+            {
+                if (string.IsNullOrWhiteSpace(accountPart))
+                {
+                    throw new BusinessException(ErrorCodes.BadRequest, "账号格式错误，应为 账号@手机号");
+                }
+
+                var tenantId = await _tenantRepository.FindTenantIdByContactPhoneAsync(phonePart, cancellationToken);
+                if (!tenantId.HasValue || tenantId.Value == 0)
+                {
+                    throw new BusinessException(ErrorCodes.Unauthorized, "账号或密码错误");
+                }
+
+                var originalTenant = _tenantContextAccessor.Current;
+                _tenantContextAccessor.Current = new TenantContext(tenantId.Value, null, "login:simple:contact_phone");
+                try
+                {
+                    return await LoginAsync(new AdminLoginRequest { Account = accountPart, Password = request.Password }, cancellationToken);
+                }
+                finally
+                {
+                    _tenantContextAccessor.Current = originalTenant;
+                }
+            }
+        }
+
+        // 3. 未携带手机号时，要求外部已解析租户（Header/Host 等）
+        if (_tenantProvider.GetCurrentTenantId() == 0)
+        {
+            throw new BusinessException(ErrorCodes.BadRequest, "缺少租户标识，请使用 账号@手机号 登录");
+        }
+
+        // 4. 走原有登录逻辑
+        return await LoginAsync(new AdminLoginRequest { Account = rawAccount, Password = request.Password }, cancellationToken);
+    }
+
     /// <summary>
     /// 刷新访问令牌：使用刷新令牌获取新的访问令牌和刷新令牌。
     /// </summary>
@@ -214,6 +273,35 @@ public sealed class AdminAuthService(
         };
     }
 
+    private static bool IsLikelyPhone(string value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return false;
+        }
+
+        var span = value.AsSpan();
+        if (span[0] == '+')
+        {
+            span = span[1..];
+        }
+
+        if (span.Length < 6 || span.Length > 32)
+        {
+            return false;
+        }
+
+        foreach (var ch in span)
+        {
+            if (!char.IsDigit(ch))
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     private static IReadOnlyList<MenuNodeDto> BuildMenuTree(
         IReadOnlyList<Domain.Identity.Entities.MenuDefinition> definitions,
         IReadOnlyList<string> permissions)
diff --git a/src/Domain/TakeoutSaaS.Domain/Tenants/Repositories/ITenantRepository.cs b/src/Domain/TakeoutSaaS.Domain/Tenants/Repositories/ITenantRepository.cs
index 41b9136..a6ebbc0 100644
--- a/src/Domain/TakeoutSaaS.Domain/Tenants/Repositories/ITenantRepository.cs
+++ b/src/Domain/TakeoutSaaS.Domain/Tenants/Repositories/ITenantRepository.cs
@@ -60,6 +60,14 @@ public interface ITenantRepository
     /// <returns>存在返回 true，否则 false。</returns>
     Task<bool> ExistsByContactPhoneAsync(string phone, CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// 依据联系人手机号查询租户 ID。
+    /// </summary>
+    /// <param name="phone">联系人手机号。</param>
+    /// <param name="cancellationToken">取消标记。</param>
+    /// <returns>租户 ID，未找到返回 null。</returns>
+    Task<long?> FindTenantIdByContactPhoneAsync(string phone, CancellationToken cancellationToken = default);
+
     /// <summary>
     /// 获取实名资料。
     /// </summary>
diff --git a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfTenantRepository.cs b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfTenantRepository.cs
index a1bd911..61e7ff0 100644
--- a/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfTenantRepository.cs
+++ b/src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfTenantRepository.cs
@@ -77,6 +77,18 @@ public sealed class EfTenantRepository(TakeoutAppDbContext context) : ITenantRep
         return context.Tenants.AnyAsync(x => x.ContactPhone == normalized, cancellationToken);
     }
 
+    /// <inheritdoc />
+    public Task<long?> FindTenantIdByContactPhoneAsync(string phone, CancellationToken cancellationToken = default)
+    {
+        // 1. 标准化手机号
+        var normalized = phone.Trim();
+        // 2. 查询租户 ID
+        return context.Tenants.AsNoTracking()
+            .Where(x => x.ContactPhone == normalized)
+            .Select(x => (long?)x.Id)
+            .FirstOrDefaultAsync(cancellationToken);
+    }
+
     /// <inheritdoc />
     public Task<TenantVerificationProfile?> GetVerificationProfileAsync(long tenantId, CancellationToken cancellationToken = default)
     {