diff --git a/gateway/src/IntegrationGateway.Adapters.Kms/KmsAdapter.cs b/gateway/src/IntegrationGateway.Adapters.Kms/KmsAdapter.cs
new file mode 100644
index 0000000..5cdf835
--- /dev/null
+++ b/gateway/src/IntegrationGateway.Adapters.Kms/KmsAdapter.cs
@@ -0,0 +1,171 @@
+using IntegrationGateway.Core.Abstractions;
+using IntegrationGateway.Core.Infrastructure;
+using IntegrationGateway.Core.Models;
+using System.Net.Http.Json;
+using System.Text;
+using System.Text.Json;
+
+namespace IntegrationGateway.Adapters.Kms;
+
+/// <summary>
+/// KMS 智能钥匙柜适配器。
+/// 实现: IHasFlatDevices + IHasAlarms。
+/// 
+/// 设备模型：柜体为父设备(IsParent=是)，锁孔为子设备(ParentSourceId=柜体SourceId)。
+/// AdapterCode: "KMS:{InstanceName}"。
+/// 限流：5 QPS。
+/// 
+/// 按设计文档 §6 KmsAdapter 完整实现。
+/// </summary>
+public class KmsAdapter : IHasFlatDevices, IHasAlarms
+{
+    private readonly HttpClient _http;
+    private readonly KmsAuthHelper _auth;
+    private readonly RateLimiter _limiter = new(5);
+
+    /// <summary>适配器编码，格式 "KMS:{实例名}"</summary>
+    public string AdapterCode { get; }
+
+    /// <summary>人类可读的适配器名称</summary>
+    public string DisplayName => $"KMS ({AdapterCode})";
+
+    /// <summary>适配器能力声明</summary>
+    public AdapterCapabilities Capabilities => new() { HasFlatDevices = true, HasAlarms = true };
+
+    /// <summary>创建 KmsAdapter 实例</summary>
+    /// <param name="adapterCode">适配器编码</param>
+    /// <param name="http">HttpClient 实例</param>
+    /// <param name="baseUrl">KMS 服务地址</param>
+    /// <param name="clientId">KMS 客户端 ID</param>
+    /// <param name="clientSecret">KMS 客户端密钥</param>
+    public KmsAdapter(string adapterCode, HttpClient http, string baseUrl, string clientId, string clientSecret)
+    {
+        AdapterCode = adapterCode;
+        _http = http;
+        _auth = new KmsAuthHelper(http, baseUrl, clientId, clientSecret);
+    }
+
+    /// <summary>初始化适配器：获取 KMS Token</summary>
+    public async Task InitializeAsync() => await _auth.GetTokenAsync();
+
+    // ═══════════════════════════════════════════
+    // IGatewayAdapter — 健康检查（2.18.1 心跳）
+    // ═══════════════════════════════════════════
+
+    /// <summary>调用 KMS 心跳接口确认可达性</summary>
+    public async Task<bool> HealthCheckAsync()
+    {
+        try
+        {
+            var client = await _auth.GetAuthenticatedClientAsync();
+            var resp = await client.GetAsync("/prod-api/heartBeat");
+            return resp.IsSuccessStatusCode;
+        }
+        catch { return false; }
+    }
+
+    // ═══════════════════════════════════════════
+    // IHasFlatDevices — 设备列表（2.18.4 柜体+钥匙）
+    // ═══════════════════════════════════════════
+
+    /// <summary>
+    /// 获取 KMS 所有柜体及其锁孔，映射为 StandardDevice 列表。
+    /// 柜体为父设备（IsParent=是），锁孔为子设备（ParentSourceId=柜体SourceId）。
+    /// </summary>
+    public async Task<PagedResult<StandardDevice>> GetDevicesAsync(int page, int size, string? keyword = null)
+    {
+        await _limiter.WaitAsync();
+        var client = await _auth.GetAuthenticatedClientAsync();
+        var resp = await client.PostAsync("/prod-api/getOpenerList",
+            new StringContent("{}", Encoding.UTF8, "application/json"));
+        resp.EnsureSuccessStatusCode();
+        var data = await resp.Content.ReadFromJsonAsync<KmsOpenerListResponse>()!;
+
+        var devices = new List<StandardDevice>();
+        foreach (var locker in data.Rows ?? new())
+        {
+            devices.Add(MapLockerToDevice(locker));
+            if (locker.LockholeList != null)
+                devices.AddRange(locker.LockholeList.Select(h => MapLockholeToDevice(h, locker.LockerId)));
+        }
+        return new PagedResult<StandardDevice> { Items = devices, Total = devices.Count };
+    }
+
+    /// <summary>KMS 柜体 → StandardDevice（父设备）</summary>
+    private static StandardDevice MapLockerToDevice(KmsLocker locker) => new()
+    {
+        SourceId = $"locker_{locker.LockerId}",
+        Name = locker.LockerName ?? $"柜体{locker.LockerId}",
+        Category = "智能钥匙柜",
+        Group = "门禁设备",
+        IsParent = true,
+        IsOnline = true,
+        Extra = new Dictionary<string, object?>
+        {
+            ["lockerCode"] = locker.LockerCode,
+            ["lockholeCount"] = locker.LockholeList?.Count ?? 0
+        }
+    };
+
+    /// <summary>KMS 锁孔 → StandardDevice（子设备）</summary>
+    private static StandardDevice MapLockholeToDevice(KmsLockhole hole, int lockerId) => new()
+    {
+        SourceId = $"lockhole_{lockerId}_{hole.LockholeSort}",
+        Name = hole.OpenerName ?? $"锁孔{hole.LockholeSort}",
+        Category = "钥匙位",
+        Group = "门禁设备",
+        IsParent = false,
+        IsOnline = hole.OpenerState == "在位",
+        ParentSourceId = $"locker_{lockerId}",
+        Extra = new Dictionary<string, object?>
+        {
+            ["openerId"] = hole.OpenerId,
+            ["openerType"] = hole.OpenerType,
+            ["openerState"] = hole.OpenerState
+        }
+    };
+
+    // ═══════════════════════════════════════════
+    // IHasAlarms — 告警（2.18.7 告警列表）
+    // ═══════════════════════════════════════════
+
+    /// <summary>分页查询 KMS 告警列表，映射到 StandardAlarm</summary>
+    public async Task<PagedResult<StandardAlarm>> GetAlarmsAsync(
+        int page, int size, DateTime from, DateTime to, string? level = null, string? state = null)
+    {
+        await _limiter.WaitAsync();
+        var client = await _auth.GetAuthenticatedClientAsync();
+        var resp = await client.PostAsync("/prod-api/getWarningList",
+            new StringContent("{}", Encoding.UTF8, "application/json"));
+        resp.EnsureSuccessStatusCode();
+        var data = await resp.Content.ReadFromJsonAsync<KmsWarningListResponse>()!;
+
+        var alarms = (data.Rows ?? new()).Select(w => new StandardAlarm
+        {
+            AlarmId = w.Uuid ?? "",
+            AdapterCode = AdapterCode,
+            Level = "普通", // KMS 不区分告警等级，统一"普通"
+            Title = $"{w.LockerName} 锁孔{w.LockholeSort}: {w.OpenerName}",
+            Content = w.Remark,
+            OccurTime = DateTime.TryParse(w.WarningTime, out var t) ? t : DateTime.MinValue,
+            Status = w.Type == 1 ? "未确认" : "已结束"
+        }).ToList();
+
+        return new PagedResult<StandardAlarm> { Items = alarms, Total = data.Total };
+    }
+
+    /// <summary>确认告警（调 KMS 标准告警确认接口）</summary>
+    public async Task ConfirmAlarmAsync(string alarmId)
+    {
+        await _limiter.WaitAsync();
+        var client = await _auth.GetAuthenticatedClientAsync();
+        await client.PostAsync($"/prod-api/kms/warning/confirm/{alarmId}", null);
+    }
+
+    /// <summary>结束告警（KMS 第三方接口不提供，留空实现）</summary>
+    public Task EndAlarmAsync(string alarmId)
+    {
+        // KMS 第三方接口 (2.18.7) 不提供告警结束 API
+        return Task.CompletedTask;
+    }
+}