diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59b556d..bec54ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,6 @@ project(new_kbd)
 
 zephyr_include_directories(${CMAKE_CURRENT_SOURCE_DIR}/inc)
 zephyr_include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/events)
-zephyr_include_directories(${CMAKE_CURRENT_SOURCE_DIR}/configuration/atguigu_mini_keyboard_nrf52840)
 
 target_compile_definitions(app PRIVATE
     APP_HID_KEYMAP_DEF_PATH=\"hid_keymap_def.h\"
@@ -22,12 +21,14 @@ target_sources(app PRIVATE
     src/events/config_event.c
     src/events/hid_protocol_event.c
     src/events/hid_report_event.c
+    src/events/keyboard_led_state_event.c
     src/events/mode_event.c
     src/events/usb_hid_event.c
     src/modules/battery_module.c
     src/modules/ble_adv_ctrl_module.c
     src/modules/ble_bond_module.c
     src/modules/keyboard_module.c
+    src/modules/led_state_module.c
     src/modules/mode_switch_module.c
     src/modules/usb_hid_module.c
     src/modules/ble_hid_module.c
diff --git a/app.overlay b/app.overlay
index a552a65..212a8e4 100644
--- a/app.overlay
+++ b/app.overlay
@@ -53,6 +53,10 @@
     status = "okay";
 };
 
+&led_1 {
+    status = "okay";
+};
+
 /* 使能 SAADC，mode_switch_module 使用 channel 7 采样模式拨码电压。 */
 &adc {
     status = "okay";
@@ -63,7 +67,6 @@
 
     ip5305: pmic@75 {
         status = "okay";
-        /* 试验项：调整 IP5305 KEY 保活周期，观察 I2C 失败窗口是否随周期移动。 */
         keepalive-interval-ms = <10000>;
     };
 };
diff --git a/configuration/atguigu_mini_keyboard_nrf52840/hid_keymap_def.h b/inc/hid_keymap_def.h
similarity index 100%
rename from configuration/atguigu_mini_keyboard_nrf52840/hid_keymap_def.h
rename to inc/hid_keymap_def.h
diff --git a/inc/led_state.h b/inc/led_state.h
new file mode 100644
index 0000000..0ada0b8
--- /dev/null
+++ b/inc/led_state.h
@@ -0,0 +1,29 @@
+#ifndef NEW_KBD_LED_STATE_H__
+#define NEW_KBD_LED_STATE_H__
+
+#include <zephyr/types.h>
+
+/* 模块内系统状态：只用于本项目的 LED 映射，不对外暴露协议语义。 */
+enum led_ble_state {
+	LED_BLE_STATE_OFF = 0,
+	LED_BLE_STATE_WAIT_RECONNECT,
+	LED_BLE_STATE_PAIRING,
+	LED_BLE_STATE_CONNECTED,
+	LED_BLE_STATE_COUNT,
+};
+
+enum led_num_lock_state {
+	LED_NUM_LOCK_STATE_OFF = 0,
+	LED_NUM_LOCK_STATE_ON,
+	LED_NUM_LOCK_STATE_COUNT,
+};
+
+enum led_id_new_kbd {
+	LED_ID_NUM_LOCK = 0,
+	LED_ID_BLE_STATE,
+	LED_ID_COUNT,
+};
+
+#define LED_UNAVAILABLE 0xFF
+
+#endif /* NEW_KBD_LED_STATE_H__ */
diff --git a/inc/led_state_def.h b/inc/led_state_def.h
new file mode 100644
index 0000000..42732da
--- /dev/null
+++ b/inc/led_state_def.h
@@ -0,0 +1,39 @@
+#include "led_state.h"
+#include <caf/led_effect.h>
+
+/*
+ * 该文件仅被 led_state_module.c 包含一次，用于定义：
+ * 1) 逻辑 LED 到 CAF LED 实例编号映射；
+ * 2) 每个逻辑状态对应的 LED 效果。
+ */
+const struct {} led_state_def_include_once;
+
+/*
+ * CAF LED 实例编号来源于 DTS 中 status=okay 的 gpio-leds 顺序：
+ * - led_0 -> 0（Num Lock）
+ * - led_1 -> 1（BLE 状态）
+ */
+static const uint8_t led_map[LED_ID_COUNT] = {
+	[LED_ID_NUM_LOCK] = 0,
+	[LED_ID_BLE_STATE] = 1,
+};
+
+/* Num Lock 指示：灭=关闭，常亮=开启。 */
+static const struct led_effect led_num_lock_state_effect[LED_NUM_LOCK_STATE_COUNT] = {
+	[LED_NUM_LOCK_STATE_OFF] = LED_EFFECT_LED_OFF(),
+	[LED_NUM_LOCK_STATE_ON] = LED_EFFECT_LED_ON(LED_COLOR(255, 255, 255)),
+};
+
+/*
+ * BLE 指示灯策略：
+ * - OFF: 熄灭（USB 连接或 BLE 非活动模式）
+ * - WAIT_RECONNECT: 慢闪（1s toggle）
+ * - PAIRING: 快闪（0.5s toggle）
+ * - CONNECTED: 常亮
+ */
+static const struct led_effect led_ble_state_effect[LED_BLE_STATE_COUNT] = {
+	[LED_BLE_STATE_OFF] = LED_EFFECT_LED_OFF(),
+	[LED_BLE_STATE_WAIT_RECONNECT] = LED_EFFECT_LED_BLINK(1000, LED_COLOR(255, 255, 255)),
+	[LED_BLE_STATE_PAIRING] = LED_EFFECT_LED_BLINK(500, LED_COLOR(255, 255, 255)),
+	[LED_BLE_STATE_CONNECTED] = LED_EFFECT_LED_ON(LED_COLOR(255, 255, 255)),
+};
diff --git a/src/events/keyboard_led_state_event.c b/src/events/keyboard_led_state_event.c
new file mode 100644
index 0000000..fcfac10
--- /dev/null
+++ b/src/events/keyboard_led_state_event.c
@@ -0,0 +1,31 @@
+#include "keyboard_led_state_event.h"
+
+static void log_keyboard_led_state_event(const struct app_event_header *aeh)
+{
+	const struct keyboard_led_state_event *event =
+		cast_keyboard_led_state_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "mask=0x%02x num_lock=%u",
+			      event->led_mask, event->num_lock);
+}
+
+static void profile_keyboard_led_state_event(struct log_event_buf *buf,
+					     const struct app_event_header *aeh)
+{
+	const struct keyboard_led_state_event *event =
+		cast_keyboard_led_state_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, event->led_mask);
+	nrf_profiler_log_encode_uint8(buf, event->num_lock);
+}
+
+APP_EVENT_INFO_DEFINE(keyboard_led_state_event,
+		      ENCODE(NRF_PROFILER_ARG_U8,
+			     NRF_PROFILER_ARG_U8),
+		      ENCODE("led_mask", "num_lock"),
+		      profile_keyboard_led_state_event);
+
+APP_EVENT_TYPE_DEFINE(keyboard_led_state_event,
+		      log_keyboard_led_state_event,
+		      &keyboard_led_state_event_info,
+		      APP_EVENT_FLAGS_CREATE(APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));
diff --git a/src/events/keyboard_led_state_event.h b/src/events/keyboard_led_state_event.h
new file mode 100644
index 0000000..5fc5fa2
--- /dev/null
+++ b/src/events/keyboard_led_state_event.h
@@ -0,0 +1,24 @@
+#ifndef KEYBOARD_LED_STATE_EVENT_H__
+#define KEYBOARD_LED_STATE_EVENT_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <app_event_manager.h>
+#include <app_event_manager_profiler_tracer.h>
+
+/*
+ * 键盘 LED 状态事件：
+ * - 由 USB/BLE HID 接收主机输出报告后上报；
+ * - 当前仅消费 Num Lock 位，保留 led_mask 便于后续扩展 Caps/Scroll。
+ */
+struct keyboard_led_state_event {
+	struct app_event_header header;
+
+	uint8_t led_mask;
+	bool num_lock;
+};
+
+APP_EVENT_TYPE_DECLARE(keyboard_led_state_event);
+
+#endif /* KEYBOARD_LED_STATE_EVENT_H__ */
diff --git a/src/modules/ble_hid_module.c b/src/modules/ble_hid_module.c
index 86aa6e3..db248b3 100644
--- a/src/modules/ble_hid_module.c
+++ b/src/modules/ble_hid_module.c
@@ -10,6 +10,7 @@
 #include "hid_protocol_event.h"
 #include "hid_report_event.h"
 #include "hid_report_descriptor.h"
+#include "keyboard_led_state_event.h"
 #include "mode_event.h"
 
 #include <zephyr/logging/log.h>
@@ -27,6 +28,8 @@ BT_HIDS_DEF(hids_obj, INPUT_REPORT_COUNT, OUTPUT_REPORT_COUNT, 0);
 static struct bt_conn *active_conn;
 static enum bt_hids_pm current_pm = BT_HIDS_PM_REPORT;
 static bool ble_mode_selected;
+static bool num_lock_known;
+static bool num_lock_on;
 
 static enum hid_protocol_type pm_to_protocol(enum bt_hids_pm pm)
 {
@@ -42,6 +45,25 @@ static void publish_hid_protocol_event(enum hid_protocol_type protocol)
 	APP_EVENT_SUBMIT(event);
 }
 
+/* BLE 输出报告的 bit0 对应 Num Lock。仅在状态变化时上报，避免重复通知。 */
+static void publish_num_lock_state_from_led_mask(uint8_t led_mask)
+{
+	bool new_num_lock = (led_mask & BIT(0)) != 0U;
+
+	if (num_lock_known && (num_lock_on == new_num_lock)) {
+		return;
+	}
+
+	num_lock_known = true;
+	num_lock_on = new_num_lock;
+
+	struct keyboard_led_state_event *event = new_keyboard_led_state_event();
+
+	event->led_mask = led_mask;
+	event->num_lock = new_num_lock;
+	APP_EVENT_SUBMIT(event);
+}
+
 static void pm_evt_handler(enum bt_hids_pm_evt evt, struct bt_conn *conn)
 {
 	ARG_UNUSED(conn);
@@ -86,6 +108,7 @@ static void boot_keyboard_output_report_handler(struct bt_hids_rep *rep,
 		return;
 	}
 
+	publish_num_lock_state_from_led_mask(rep->data[0]);
 	LOG_DBG("Boot KB out report 0x%02x", rep->data[0]);
 }
 
@@ -99,6 +122,7 @@ static void keyboard_output_report_handler(struct bt_hids_rep *rep,
 		return;
 	}
 
+	publish_num_lock_state_from_led_mask(rep->data[0]);
 	LOG_DBG("Report KB out report 0x%02x", rep->data[0]);
 }
 
diff --git a/src/modules/led_state_module.c b/src/modules/led_state_module.c
new file mode 100644
index 0000000..58bf563
--- /dev/null
+++ b/src/modules/led_state_module.c
@@ -0,0 +1,180 @@
+#include <zephyr/kernel.h>
+
+#include <app_event_manager.h>
+
+#define MODULE led_state
+#include <caf/events/module_state_event.h>
+#include <caf/events/ble_common_event.h>
+#include <caf/events/led_event.h>
+
+#include "keyboard_led_state_event.h"
+#include "led_state.h"
+#include "mode_event.h"
+#include "led_state_def.h"
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);
+
+static uint8_t connected_peer_count;
+static bool ble_mode_selected;
+static bool peer_search_active;
+static enum peer_operation peer_op = PEER_OPERATION_CANCEL;
+static bool num_lock_on;
+
+/* 根据当前聚合上下文决定 BLE 状态灯的逻辑状态。 */
+static enum led_ble_state resolve_ble_led_state(void)
+{
+	if (!ble_mode_selected)
+		return LED_BLE_STATE_OFF;
+
+	switch (peer_op) {
+	case PEER_OPERATION_SELECT:
+	case PEER_OPERATION_ERASE:
+	case PEER_OPERATION_ERASE_ADV:
+		return LED_BLE_STATE_PAIRING;
+
+	case PEER_OPERATION_SELECTED:
+	case PEER_OPERATION_ERASE_ADV_CANCEL:
+	case PEER_OPERATION_ERASED:
+	case PEER_OPERATION_CANCEL:
+	case PEER_OPERATION_SCAN_REQUEST:
+		if (peer_search_active)
+			return LED_BLE_STATE_PAIRING;
+
+		if (connected_peer_count > 0U)
+			return LED_BLE_STATE_CONNECTED;
+
+		return LED_BLE_STATE_WAIT_RECONNECT;
+
+	default:
+		__ASSERT_NO_MSG(false);
+		return LED_BLE_STATE_OFF;
+	}
+}
+
+/* 发布 Num Lock 灯效。 */
+static void submit_num_lock_led(void)
+{
+	if (led_map[LED_ID_NUM_LOCK] == LED_UNAVAILABLE)
+		return;
+
+	enum led_num_lock_state state =
+		num_lock_on ? LED_NUM_LOCK_STATE_ON : LED_NUM_LOCK_STATE_OFF;
+	struct led_event *event = new_led_event();
+
+	event->led_id = led_map[LED_ID_NUM_LOCK];
+	event->led_effect = &led_num_lock_state_effect[state];
+	APP_EVENT_SUBMIT(event);
+}
+
+/* 发布 BLE 状态灯效。 */
+static void submit_ble_led(void)
+{
+	if (led_map[LED_ID_BLE_STATE] == LED_UNAVAILABLE)
+		return;
+
+	enum led_ble_state state = resolve_ble_led_state();
+	struct led_event *event = new_led_event();
+
+	event->led_id = led_map[LED_ID_BLE_STATE];
+	event->led_effect = &led_ble_state_effect[state];
+	APP_EVENT_SUBMIT(event);
+}
+
+static bool handle_mode_event(const struct mode_event *event)
+{
+	ble_mode_selected = (event->mode_type == MODE_TYPE_BLE);
+	submit_ble_led();
+	return false;
+}
+
+static bool handle_ble_peer_event(const struct ble_peer_event *event)
+{
+	switch (event->state) {
+	case PEER_STATE_CONNECTED:
+		__ASSERT_NO_MSG(connected_peer_count < UINT8_MAX);
+		connected_peer_count++;
+		break;
+
+	case PEER_STATE_DISCONNECTED:
+		__ASSERT_NO_MSG(connected_peer_count > 0U);
+		connected_peer_count--;
+		break;
+
+	case PEER_STATE_SECURED:
+	case PEER_STATE_CONN_FAILED:
+	case PEER_STATE_DISCONNECTING:
+		break;
+
+	default:
+		__ASSERT_NO_MSG(false);
+		break;
+	}
+
+	submit_ble_led();
+	return false;
+}
+
+static bool handle_ble_peer_search_event(const struct ble_peer_search_event *event)
+{
+	peer_search_active = event->active;
+	submit_ble_led();
+	return false;
+}
+
+static bool handle_ble_peer_operation_event(const struct ble_peer_operation_event *event)
+{
+	peer_op = event->op;
+	submit_ble_led();
+	return false;
+}
+
+static bool handle_keyboard_led_state_event(const struct keyboard_led_state_event *event)
+{
+	num_lock_on = event->num_lock;
+	submit_num_lock_led();
+	return false;
+}
+
+static bool app_event_handler(const struct app_event_header *aeh)
+{
+	if (is_module_state_event(aeh)) {
+		const struct module_state_event *event = cast_module_state_event(aeh);
+
+		if (check_state(event, MODULE_ID(main), MODULE_STATE_READY)) {
+			submit_num_lock_led();
+			submit_ble_led();
+			module_set_state(MODULE_STATE_READY);
+		}
+
+		return false;
+	}
+
+	if (is_mode_event(aeh))
+		return handle_mode_event(cast_mode_event(aeh));
+
+	if (is_keyboard_led_state_event(aeh))
+		return handle_keyboard_led_state_event(cast_keyboard_led_state_event(aeh));
+
+	if (IS_ENABLED(CONFIG_CAF_BLE_COMMON_EVENTS) && is_ble_peer_event(aeh))
+		return handle_ble_peer_event(cast_ble_peer_event(aeh));
+
+	if (IS_ENABLED(CONFIG_CAF_BLE_COMMON_EVENTS) && is_ble_peer_search_event(aeh))
+		return handle_ble_peer_search_event(cast_ble_peer_search_event(aeh));
+
+	if (IS_ENABLED(CONFIG_CAF_BLE_COMMON_EVENTS) && is_ble_peer_operation_event(aeh))
+		return handle_ble_peer_operation_event(cast_ble_peer_operation_event(aeh));
+
+	__ASSERT_NO_MSG(false);
+	return false;
+}
+
+APP_EVENT_LISTENER(MODULE, app_event_handler);
+APP_EVENT_SUBSCRIBE(MODULE, module_state_event);
+APP_EVENT_SUBSCRIBE(MODULE, mode_event);
+APP_EVENT_SUBSCRIBE(MODULE, keyboard_led_state_event);
+#ifdef CONFIG_CAF_BLE_COMMON_EVENTS
+APP_EVENT_SUBSCRIBE(MODULE, ble_peer_event);
+APP_EVENT_SUBSCRIBE(MODULE, ble_peer_search_event);
+APP_EVENT_SUBSCRIBE(MODULE, ble_peer_operation_event);
+#endif
diff --git a/src/modules/usb_hid_module.c b/src/modules/usb_hid_module.c
index f1767c7..0aa122c 100644
--- a/src/modules/usb_hid_module.c
+++ b/src/modules/usb_hid_module.c
@@ -15,6 +15,7 @@
 #include "hid_report_descriptor.h"
 #include "hid_protocol_event.h"
 #include "hid_report_event.h"
+#include "keyboard_led_state_event.h"
 #include "mode_event.h"
 #include "usb_hid_event.h"
 
@@ -55,6 +56,8 @@ struct usb_hid_ctx {
 
 	enum usb_hid_usbd_state usbd_state;
 	enum hid_protocol_type current_protocol;
+	bool num_lock_known;
+	bool num_lock_on;
 };
 
 static struct usb_hid_ctx g_usb_hid = {
@@ -85,6 +88,25 @@ static void publish_usb_hid_state(void)
 	APP_EVENT_SUBMIT(event);
 }
 
+/* 从主机输出报告同步 Num Lock 位，并在状态变化时发布事件。 */
+static void publish_num_lock_state_from_led_mask(uint8_t led_mask)
+{
+	bool new_num_lock = (led_mask & BIT(0)) != 0U;
+
+	if (g_usb_hid.num_lock_known && (g_usb_hid.num_lock_on == new_num_lock)) {
+		return;
+	}
+
+	g_usb_hid.num_lock_known = true;
+	g_usb_hid.num_lock_on = new_num_lock;
+
+	struct keyboard_led_state_event *event = new_keyboard_led_state_event();
+
+	event->led_mask = led_mask;
+	event->num_lock = new_num_lock;
+	APP_EVENT_SUBMIT(event);
+}
+
 static void recompute_hid_state(void)
 {
 	/* 兼容现有调用点：对外仅发布 enable + usbd 状态。 */
@@ -118,8 +140,11 @@ static int hid_stub_set_report(const struct device *dev,
 	ARG_UNUSED(dev);
 	ARG_UNUSED(type);
 	ARG_UNUSED(id);
-	ARG_UNUSED(len);
-	ARG_UNUSED(buf);
+
+	if ((len > 0U) && (buf != NULL)) {
+		publish_num_lock_state_from_led_mask(buf[0]);
+	}
+
 	return 0;
 }
 
@@ -188,8 +213,10 @@ static void hid_stub_input_done(const struct device *dev, const uint8_t *report)
 static void hid_stub_output_report(const struct device *dev, uint16_t len, const uint8_t *buf)
 {
 	ARG_UNUSED(dev);
-	ARG_UNUSED(len);
-	ARG_UNUSED(buf);
+
+	if ((len > 0U) && (buf != NULL)) {
+		publish_num_lock_state_from_led_mask(buf[0]);
+	}
 }
 
 static void hid_iface_ready_cb(const struct device *dev, bool ready)