diff --git a/db.sql b/db.sql
index c3e4e3f..3704730 100644
--- a/db.sql
+++ b/db.sql
@@ -908,7 +908,7 @@ CREATE TABLE `t_customer` (
   `WechatAvatar` VARCHAR(255) NULL COMMENT '微信头像URL',
   `WechatNickname` VARCHAR(64) NULL COMMENT '微信昵称',
   `Email` VARCHAR(64) NULL COMMENT '邮箱，用于登录/找回密码',
-  `Phone` VARCHAR(16) NOT NULL COMMENT '手机号，用于登录/验证',
+  `Phone` VARCHAR(16) NULL COMMENT '手机号，用于联系；可空，唯一（NULL 可多条）',
   `Balance` DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '账户余额',
   `TotalQuota` DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '总额度',
   `UsedQuota` DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '已用额度',
diff --git a/sql/20260727_customer_phone_nullable.sql b/sql/20260727_customer_phone_nullable.sql
new file mode 100644
index 0000000..1788f35
--- /dev/null
+++ b/sql/20260727_customer_phone_nullable.sql
@@ -0,0 +1,5 @@
+-- 微信注册简化：客户手机号改为可空（空值请用 NULL，勿存空字符串）
+-- 执行环境：生产库先备份；与 docs/微信注册简化与联系方式补全方案.md 一致
+
+ALTER TABLE `t_customer`
+  MODIFY COLUMN `Phone` VARCHAR(16) NULL COMMENT '手机号，用于联系；可空，唯一（NULL 可多条）';
diff --git a/src/Oms.Application/Dtos/Customers/CustomerContactDtos.cs b/src/Oms.Application/Dtos/Customers/CustomerContactDtos.cs
new file mode 100644
index 0000000..8e24fb6
--- /dev/null
+++ b/src/Oms.Application/Dtos/Customers/CustomerContactDtos.cs
@@ -0,0 +1,37 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Oms.Application.Dtos.Customers;
+
+/// <summary>
+/// 客户联系方式完整度。
+/// </summary>
+public class CustomerProfileCompletenessOutput
+{
+    public bool PhoneFilled { get; set; }
+
+    public bool EmailFilled { get; set; }
+
+    /// <summary>缺手机或邮箱时为 true。</summary>
+    public bool NeedContact { get; set; }
+
+    public string CustomerCode { get; set; } = string.Empty;
+
+    public string? Phone { get; set; }
+
+    public string? Email { get; set; }
+}
+
+/// <summary>
+/// 补全手机号与邮箱（下单前）。
+/// </summary>
+public class CompleteCustomerContactInput
+{
+    [Required]
+    [StringLength(16)]
+    public string Phone { get; set; } = string.Empty;
+
+    [Required]
+    [EmailAddress]
+    [StringLength(64)]
+    public string Email { get; set; } = string.Empty;
+}
diff --git a/src/Oms.Application/Services/Customers/CustomerService.cs b/src/Oms.Application/Services/Customers/CustomerService.cs
index f9172a4..8772f4f 100644
--- a/src/Oms.Application/Services/Customers/CustomerService.cs
+++ b/src/Oms.Application/Services/Customers/CustomerService.cs
@@ -141,6 +141,60 @@ public class CustomerService : ApplicationService
         return await ServiceAdvisorResolver.ResolveAsync(customer.CustomerService, cancellationToken);
     }
 
+    /// <summary>
+    /// 当前登录客户联系方式完整度（下单/揽收前校验）。
+    /// </summary>
+    [HttpGet("/customer/profile-completeness")]
+    public async Task<CustomerProfileCompletenessOutput> GetProfileCompletenessAsync(
+        CancellationToken cancellationToken = default)
+    {
+        var customer = await GetCurrentCustomerOrThrowAsync(cancellationToken);
+        var phoneFilled = CustomerContactHelper.HasPhone(customer);
+        var emailFilled = CustomerContactHelper.HasEmail(customer);
+        return new CustomerProfileCompletenessOutput
+        {
+            PhoneFilled = phoneFilled,
+            EmailFilled = emailFilled,
+            NeedContact = !phoneFilled || !emailFilled,
+            CustomerCode = customer.CustomerCode,
+            Phone = customer.Phone,
+            Email = customer.Email
+        };
+    }
+
+    /// <summary>
+    /// 补全手机号与邮箱（下单前）。
+    /// </summary>
+    [HttpPost("/customer/complete-contact")]
+    public async Task CompleteContactAsync(
+        [FromBody] CompleteCustomerContactInput input,
+        CancellationToken cancellationToken = default)
+    {
+        var customer = await GetCurrentCustomerOrThrowAsync(cancellationToken);
+        var phone = WeChatRegistrationFieldNormalizer.TruncateRequired(
+            NormalizeRequiredText(input.Phone, "手机号"),
+            WeChatRegistrationFieldNormalizer.PhoneMaxLength);
+        var email = WeChatRegistrationFieldNormalizer.TruncateRequired(
+            NormalizeRequiredText(input.Email, "邮箱"),
+            WeChatRegistrationFieldNormalizer.EmailMaxLength);
+
+        var duplicatedPhone = await CustomerRepository.GetByPhoneAsync(phone, cancellationToken);
+        if (duplicatedPhone != null && duplicatedPhone.Id != customer.Id)
+        {
+            throw new BusinessException("手机号已存在");
+        }
+
+        var duplicatedEmail = await CustomerRepository.GetByEmailAsync(email, cancellationToken);
+        if (duplicatedEmail != null && duplicatedEmail.Id != customer.Id)
+        {
+            throw new BusinessException("邮箱已存在");
+        }
+
+        customer.Phone = phone;
+        customer.Email = email;
+        await CustomerRepository.UpdateAsync(customer);
+    }
+
     /// <summary>
     /// 新增客户。
     /// </summary>
@@ -389,6 +443,23 @@ public class CustomerService : ApplicationService
         return role.Id;
     }
 
+    private async Task<Customer> GetCurrentCustomerOrThrowAsync(CancellationToken cancellationToken = default)
+    {
+        var userId = CurrentUser.GetId<int>();
+        if (userId <= 0)
+        {
+            throw new BusinessException("客户未登录");
+        }
+
+        var customer = await CustomerRepository.FirstOrDefaultAsync(x => x.UserId == userId, cancellationToken);
+        if (customer == null)
+        {
+            throw new BusinessException("客户不存在");
+        }
+
+        return customer;
+    }
+
     private async Task<Customer> GetCurrentMainCustomerOrThrowAsync()
     {
         var userId = CurrentUser.GetId<int>();
diff --git a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
index 0e87d98..734a773 100644
--- a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
@@ -311,6 +311,8 @@ public partial class OrderService
         {
             throw new BusinessException("客户不存在或状态不可用");
         }
+
+        CustomerContactHelper.EnsureContactComplete(customer);
     }
 
     private async Task<ProductSnapshotBinding> ResolveSnapshotBindingAsync(SalesProduct product, DateTime bindTime)
diff --git a/src/Oms.Application/Services/Orders/OrderService.Pickup.cs b/src/Oms.Application/Services/Orders/OrderService.Pickup.cs
index e31fe88..e8158d4 100644
--- a/src/Oms.Application/Services/Orders/OrderService.Pickup.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.Pickup.cs
@@ -49,6 +49,9 @@ public partial class OrderService
             CustomerRepository,
             CurrentUser,
             input.CustomerId);
+        var customer = await CustomerRepository.FirstOrDefaultAsync(x => x.Id == customerId);
+        CustomerContactHelper.EnsureContactComplete(customer);
+
         var senderAddress = await CustomerSenderAddressRepository.GetOwnedAsync(input.SenderAddressId, customerId);
         if (senderAddress == null)
         {
diff --git a/src/Oms.Application/Shared/CustomerContactHelper.cs b/src/Oms.Application/Shared/CustomerContactHelper.cs
new file mode 100644
index 0000000..e5f355c
--- /dev/null
+++ b/src/Oms.Application/Shared/CustomerContactHelper.cs
@@ -0,0 +1,35 @@
+using Fake.Application;
+using Oms.Domain.CustomersAggregate.Entities;
+
+namespace Oms.Application.Shared;
+
+/// <summary>
+/// 客户联系方式完整度（下单/揽收前必填手机+邮箱）。
+/// </summary>
+public static class CustomerContactHelper
+{
+    public const string ContactRequiredMessage = "请先完善手机号和邮箱后再下单";
+
+    public static bool HasPhone(Customer? customer) =>
+        !string.IsNullOrWhiteSpace(customer?.Phone);
+
+    public static bool HasEmail(Customer? customer) =>
+        !string.IsNullOrWhiteSpace(customer?.Email);
+
+    public static bool NeedsContact(Customer? customer) =>
+        customer == null || !HasPhone(customer) || !HasEmail(customer);
+
+    public static void EnsureContactComplete(Customer? customer)
+    {
+        if (NeedsContact(customer))
+        {
+            throw new BusinessException(ContactRequiredMessage);
+        }
+    }
+
+    public static string? NormalizeOptionalContact(string? value)
+    {
+        var trimmed = value?.Trim();
+        return string.IsNullOrWhiteSpace(trimmed) ? null : trimmed;
+    }
+}
diff --git a/src/Oms.Application/Shared/OmsRbacRegistrationGuard.cs b/src/Oms.Application/Shared/OmsRbacRegistrationGuard.cs
index 258c710..e726af9 100644
--- a/src/Oms.Application/Shared/OmsRbacRegistrationGuard.cs
+++ b/src/Oms.Application/Shared/OmsRbacRegistrationGuard.cs
@@ -20,7 +20,7 @@ public static class OmsRbacRegistrationGuard
 
         if (await ExistsActiveUserByAccountAsync(rbacDbContext, normalizedAccount, cancellationToken))
         {
-            throw new BusinessException("登录账号已存在，请直接绑定或使用其他手机号");
+            throw new BusinessException("登录账号已存在，请直接绑定或使用其他账号");
         }
 
         if (normalizedEmail != null
@@ -39,7 +39,7 @@ public static class OmsRbacRegistrationGuard
                 || message.Contains("uk_user_account", StringComparison.OrdinalIgnoreCase)
                 || message.Contains("IX_user_Account", StringComparison.OrdinalIgnoreCase))
             {
-                return new BusinessException("登录账号已存在，请直接绑定或使用其他手机号");
+                return new BusinessException("登录账号已存在，请直接绑定或使用其他账号");
             }
 
             if (message.Contains("Email", StringComparison.OrdinalIgnoreCase)
diff --git a/src/Oms.Domain/CustomersAggregate/Entities/Customer.cs b/src/Oms.Domain/CustomersAggregate/Entities/Customer.cs
index 830a41a..b97281f 100644
--- a/src/Oms.Domain/CustomersAggregate/Entities/Customer.cs
+++ b/src/Oms.Domain/CustomersAggregate/Entities/Customer.cs
@@ -21,7 +21,7 @@ public class Customer : OmsAuditedAggregateRoot
 
     public string? Email { get; set; }
 
-    public string Phone { get; set; } = string.Empty;
+    public string? Phone { get; set; }
 
     public decimal Balance { get; set; }
 
diff --git a/src/SimpleAdmin.Api/WeChat/Dtos/WeChatDtos.cs b/src/SimpleAdmin.Api/WeChat/Dtos/WeChatDtos.cs
index 2415f6e..d22a6d7 100644
--- a/src/SimpleAdmin.Api/WeChat/Dtos/WeChatDtos.cs
+++ b/src/SimpleAdmin.Api/WeChat/Dtos/WeChatDtos.cs
@@ -65,12 +65,14 @@ public class WeChatCustomerRegisterInput
     [Required]
     public string CustomerName { get; set; } = string.Empty;
 
-    [Required]
-    public string Phone { get; set; } = string.Empty;
+    /// <summary>可选；下单前再补全。</summary>
+    [StringLength(16)]
+    public string? Phone { get; set; }
 
-    [Required]
+    /// <summary>可选；下单前再补全。</summary>
     [EmailAddress]
-    public string Email { get; set; } = string.Empty;
+    [StringLength(64)]
+    public string? Email { get; set; }
 
     [Required]
     [MinLength(6)]
@@ -85,6 +87,11 @@ public class WeChatCustomerRegisterInput
     public WeChatProfileInput Wechat { get; set; } = new();
 }
 
+public class WeChatCustomerRegisterOutput
+{
+    public string CustomerCode { get; set; } = string.Empty;
+}
+
 public class WeChatCustomerBindInput
 {
     [Required]
diff --git a/src/SimpleAdmin.Api/WeChat/WeChatCustomerService.cs b/src/SimpleAdmin.Api/WeChat/WeChatCustomerService.cs
index 32e3613..e7eb8b2 100644
--- a/src/SimpleAdmin.Api/WeChat/WeChatCustomerService.cs
+++ b/src/SimpleAdmin.Api/WeChat/WeChatCustomerService.cs
@@ -76,10 +76,10 @@ public class WeChatCustomerService(
     }
 
     /// <summary>
-    /// 微信授权注册客户。
+    /// 微信授权注册客户（手机/邮箱可选，下单前补全）。
     /// </summary>
     [HttpPost("/wechat/customer/register")]
-    public async Task RegisterAsync(
+    public async Task<WeChatCustomerRegisterOutput> RegisterAsync(
         [FromBody] WeChatCustomerRegisterInput input,
         CancellationToken cancellationToken = default)
     {
@@ -88,11 +88,11 @@ public class WeChatCustomerService(
         var customerName = WeChatRegistrationFieldNormalizer.TruncateRequired(
             NormalizeRequired(input.CustomerName, "客户名称"),
             WeChatRegistrationFieldNormalizer.CustomerNameMaxLength);
-        var phone = WeChatRegistrationFieldNormalizer.TruncateRequired(
-            NormalizeRequired(input.Phone, "手机号"),
+        var phone = WeChatRegistrationFieldNormalizer.TruncateOptional(
+            CustomerContactHelper.NormalizeOptionalContact(input.Phone),
             WeChatRegistrationFieldNormalizer.PhoneMaxLength);
-        var email = WeChatRegistrationFieldNormalizer.TruncateRequired(
-            NormalizeRequired(input.Email, "邮箱"),
+        var email = WeChatRegistrationFieldNormalizer.TruncateOptional(
+            CustomerContactHelper.NormalizeOptionalContact(input.Email),
             WeChatRegistrationFieldNormalizer.EmailMaxLength);
         var password = NormalizeRequired(input.Password, "密码");
         var wechatOpenid = WeChatRegistrationFieldNormalizer.TruncateRequired(
@@ -115,7 +115,11 @@ public class WeChatCustomerService(
 
         var customerCode = await CustomerCodeGenerator.GenerateNextAsync(customerRepository, cancellationToken);
         await EnsureCustomerIdentityUniqueAsync(customerCode, phone, email, cancellationToken);
-        await OmsRbacRegistrationGuard.EnsureLoginIdentityAvailableAsync(rbacDbContext, phone, email, cancellationToken);
+        await OmsRbacRegistrationGuard.EnsureLoginIdentityAvailableAsync(
+            rbacDbContext,
+            customerCode,
+            email,
+            cancellationToken);
 
         var customerRoleId = await GetCustomerRoleIdOrThrowAsync(cancellationToken);
         UserDto? user = null;
@@ -124,9 +128,9 @@ public class WeChatCustomerService(
             user = await userService.CreateAsync(new UserCreateDto
             {
                 Name = customerName,
-                Account = phone,
+                Account = customerCode,
                 Password = password,
-                Email = email,
+                Email = email ?? string.Empty,
                 RoleIds = [customerRoleId]
             });
 
@@ -164,6 +168,8 @@ public class WeChatCustomerService(
             {
                 logger.LogWarning(grantEx, "新人券发放失败: customerId={CustomerId}", entity.Id);
             }
+
+            return new WeChatCustomerRegisterOutput { CustomerCode = customerCode };
         }
         catch (Exception ex)
         {
@@ -172,7 +178,13 @@ public class WeChatCustomerService(
                 await TryRollbackRbacUserAsync(user.Id);
             }
 
-            logger.LogWarning(ex, "微信客户注册失败: phone={Phone}, email={Email}, openid={Openid}", phone, email, wechatOpenid);
+            logger.LogWarning(
+                ex,
+                "微信客户注册失败: customerCode={CustomerCode}, phone={Phone}, email={Email}, openid={Openid}",
+                customerCode,
+                phone,
+                email,
+                wechatOpenid);
             throw ex is BusinessException ? ex : OmsRbacRegistrationGuard.ToSaveBusinessException(ex);
         }
     }
@@ -241,8 +253,8 @@ public class WeChatCustomerService(
 
     private async Task EnsureCustomerIdentityUniqueAsync(
         string customerCode,
-        string phone,
-        string email,
+        string? phone,
+        string? email,
         CancellationToken cancellationToken)
     {
         if (await customerRepository.GetByCustomerCodeAsync(customerCode, cancellationToken) != null)
@@ -250,12 +262,14 @@ public class WeChatCustomerService(
             throw new BusinessException("客户编号已存在");
         }
 
-        if (await customerRepository.ExistsPhoneAnyAsync(phone, cancellationToken))
+        if (!string.IsNullOrWhiteSpace(phone)
+            && await customerRepository.ExistsPhoneAnyAsync(phone, cancellationToken))
         {
             throw new BusinessException("手机号已存在");
         }
 
-        if (await customerRepository.ExistsEmailAnyAsync(email, cancellationToken))
+        if (!string.IsNullOrWhiteSpace(email)
+            && await customerRepository.ExistsEmailAnyAsync(email, cancellationToken))
         {
             throw new BusinessException("邮箱已存在");
         }