diff --git a/app/main.cpp b/app/main.cpp
index 81bb838..9f66cb6 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -10,6 +10,7 @@
 #include "monitor_task.h"
 #include "work_task.h"
 #include "lvgl_task.h"
+#include "debug_log.h"
 #include <cstdio>
 #include <cstring>
 #include <rthw.h>
@@ -159,6 +160,8 @@ extern "C" int main(void)
     printf("\r\n===== System Ready =====\r\n");
     printf("CPU: 168MHz, SDRAM: 32MB, Flash: 1MB\r\n\r\n");
 
+    log_init();
+
     Lcd::instance().clear(Lcd::BLACK);
 
     printf("Initializing RT-Thread...\r\n");
diff --git a/app/tasks/debug_log.cpp b/app/tasks/debug_log.cpp
new file mode 100644
index 0000000..54f0c78
--- /dev/null
+++ b/app/tasks/debug_log.cpp
@@ -0,0 +1,108 @@
+#include "debug_log.h"
+#include <rtthread.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+
+static log_entry_t log_buf[LOG_BUF_SIZE] __attribute__((section(".sdram")));
+static uint32_t write_idx = 0;
+static uint32_t total_count = 0;
+static bool initialized = false;
+
+void log_init(void)
+{
+    if (!initialized)
+    {
+        memset(log_buf, 0, sizeof(log_buf));
+        write_idx = 0;
+        total_count = 0;
+        initialized = true;
+        LOG_INFO("Debug log system initialized, %d entries buffer", LOG_BUF_SIZE);
+    }
+}
+
+void log_write(log_level_t level, const char *file, int line, const char *func, const char *fmt, ...)
+{
+    if (!initialized) return;
+
+    uint32_t idx = write_idx % LOG_BUF_SIZE;
+    log_entry_t *entry = &log_buf[idx];
+
+    entry->tick = rt_tick_get();
+    entry->level = level;
+
+    va_list args;
+    va_start(args, fmt);
+    rt_snprintf(entry->message, LOG_MSG_MAX, "[%s:%d] ", file, line);
+    uint32_t prefix_len = strlen(entry->message);
+    rt_vsnprintf(entry->message + prefix_len, LOG_MSG_MAX - prefix_len, fmt, args);
+    va_end(args);
+
+    write_idx++;
+    total_count++;
+
+    const char *level_str = "I";
+    if (level == LOG_LEVEL_WARN) level_str = "W";
+    else if (level == LOG_LEVEL_ERROR) level_str = "E";
+
+    printf("[%lu][%s] %s\r\n",
+           (unsigned long)entry->tick,
+           level_str,
+           entry->message);
+}
+
+void log_dump(void)
+{
+    printf("\r\n========== DEBUG LOG DUMP ==========\r\n");
+    printf("Total entries: %lu, Buffer slots: %d\r\n",
+           (unsigned long)total_count, LOG_BUF_SIZE);
+    printf("====================================\r\n");
+
+    if (total_count == 0)
+    {
+        printf("(no log entries)\r\n");
+        return;
+    }
+
+    uint32_t start = 0;
+    uint32_t count = LOG_BUF_SIZE;
+    if (total_count < LOG_BUF_SIZE)
+    {
+        start = 0;
+        count = total_count;
+    }
+    else
+    {
+        start = write_idx % LOG_BUF_SIZE;
+    }
+
+    for (uint32_t i = 0; i < count; i++)
+    {
+        uint32_t idx = (start + i) % LOG_BUF_SIZE;
+        const log_entry_t *entry = &log_buf[idx];
+        if (entry->tick == 0 && entry->message[0] == '\0')
+            continue;
+
+        const char *level_str = "INFO";
+        if (entry->level == LOG_LEVEL_WARN) level_str = "WARN";
+        else if (entry->level == LOG_LEVEL_ERROR) level_str = "ERROR";
+
+        printf("[%06lu][%s] %s\r\n",
+               (unsigned long)entry->tick,
+               level_str,
+               entry->message);
+    }
+
+    printf("========== DUMP END ==========\r\n");
+}
+
+uint32_t log_count(void)
+{
+    return total_count;
+}
+
+const log_entry_t *log_get_entry(uint32_t index)
+{
+    if (index >= LOG_BUF_SIZE) return NULL;
+    return &log_buf[index];
+}
diff --git a/app/tasks/debug_log.h b/app/tasks/debug_log.h
new file mode 100644
index 0000000..af271a1
--- /dev/null
+++ b/app/tasks/debug_log.h
@@ -0,0 +1,37 @@
+#ifndef __DEBUG_LOG_H__
+#define __DEBUG_LOG_H__
+
+#include <cstdint>
+#include <cstdio>
+
+#define LOG_BUF_SIZE 100
+#define LOG_MSG_MAX  100
+
+typedef enum {
+    LOG_LEVEL_INFO  = 0,
+    LOG_LEVEL_WARN  = 1,
+    LOG_LEVEL_ERROR = 2,
+} log_level_t;
+
+typedef struct {
+    uint32_t tick;
+    log_level_t level;
+    char message[LOG_MSG_MAX];
+} log_entry_t;
+
+void log_init(void);
+void log_write(log_level_t level, const char *file, int line, const char *func, const char *fmt, ...);
+void log_dump(void);
+uint32_t log_count(void);
+const log_entry_t *log_get_entry(uint32_t index);
+
+#define LOG_INFO(fmt, ...) \
+    log_write(LOG_LEVEL_INFO, __FILE__, __LINE__, __FUNCTION__, fmt, ##__VA_ARGS__)
+
+#define LOG_WARN(fmt, ...) \
+    log_write(LOG_LEVEL_WARN, __FILE__, __LINE__, __FUNCTION__, fmt, ##__VA_ARGS__)
+
+#define LOG_ERROR(fmt, ...) \
+    log_write(LOG_LEVEL_ERROR, __FILE__, __LINE__, __FUNCTION__, fmt, ##__VA_ARGS__)
+
+#endif
diff --git a/app/tasks/packer_ui.cpp b/app/tasks/packer_ui.cpp
index deef56b..44a60be 100644
--- a/app/tasks/packer_ui.cpp
+++ b/app/tasks/packer_ui.cpp
@@ -1,6 +1,8 @@
 #include "packer_ui.h"
+#include "debug_log.h"
 #include "lvgl/lvgl.h"
 #include <stdio.h>
+#include <string.h>
 
 LV_FONT_DECLARE(custom_cjk_16);
 LV_FONT_DECLARE(custom_cjk_20);
@@ -8,241 +10,319 @@ LV_FONT_DECLARE(custom_cjk_30);
 LV_FONT_DECLARE(custom_cjk_40);
 
 static lv_obj_t *packer_scr = NULL;
-static lv_obj_t *header = NULL;
-static lv_obj_t *weight_panel = NULL;
-static lv_obj_t *control_panel = NULL;
-static lv_obj_t *start_btn = NULL;
-static lv_obj_t *weight_label = NULL;
-static lv_obj_t *count_label = NULL;
-static lv_obj_t *status_label = NULL;
-static lv_obj_t *set_weight_label = NULL;
-static lv_obj_t *minus_btn = NULL;
-static lv_obj_t *plus_btn = NULL;
+static lv_obj_t *card_status = NULL;
+static lv_obj_t *card_target = NULL;
+static lv_obj_t *btn_minus = NULL;
+static lv_obj_t *btn_plus = NULL;
+static lv_obj_t *btn_start = NULL;
+static lv_obj_t *btn_reset = NULL;
+static lv_obj_t *label_target_val = NULL;
+static lv_obj_t *label_current_weight = NULL;
+static lv_obj_t *label_pack_count = NULL;
+static lv_obj_t *label_status = NULL;
+static lv_obj_t *status_dot = NULL;
+static volatile bool is_running = false;
+static volatile uint32_t target_weight = 190;
+static volatile uint32_t current_weight = 0;
+static volatile uint32_t pack_count = 0;
 
-static lv_color_t COLOR_HEADER_BG = lv_color_hex(0x153962);
-static lv_color_t COLOR_BG = lv_color_hex(0x0D1117);
-static lv_color_t COLOR_CARD = lv_color_hex(0x161B22);
-static lv_color_t COLOR_TEXT = lv_color_hex(0xFFFFFF);
-static lv_color_t COLOR_GREEN = lv_color_hex(0x3FB950);
-static lv_color_t COLOR_GREEN_BRIGHT = lv_color_hex(0x01EB9B);
-static lv_color_t COLOR_RED = lv_color_hex(0xF76F4A);
-static lv_color_t COLOR_BORDER = lv_color_hex(0x30363D);
-static lv_color_t COLOR_BUTTON_DARK = lv_color_hex(0x2A2828);
+static lv_color_t COLOR_BG;
+static lv_color_t COLOR_CARD;
+static lv_color_t COLOR_CARD_TARGET;
+static lv_color_t COLOR_BTN_START;
+static lv_color_t COLOR_BTN_DARK;
+static lv_color_t COLOR_BTN_ADJ;
+static lv_color_t COLOR_BORDER;
+static lv_color_t COLOR_TEXT_MAIN;
+static lv_color_t COLOR_TEXT_SEC;
+static lv_color_t COLOR_GREEN;
+static lv_color_t COLOR_ADJ_ICON;
 
-static bool is_running = false;
-static uint32_t target_weight = 200;
-static uint32_t pack_count = 200;
+static void start_cb(lv_event_t *e);
+static void reset_cb(lv_event_t *e);
+static void minus_cb(lv_event_t *e);
+static void plus_cb(lv_event_t *e);
+static void update_display(void);
 
-static void start_stop_cb(lv_event_t *e);
-static void weight_dec_cb(lv_event_t *e);
-static void weight_inc_cb(lv_event_t *e);
-static void update_status_display();
+static void set_colors(void)
+{
+    COLOR_BG = lv_color_hex(0x161b22);
+    COLOR_CARD = lv_color_hex(0x000000);
+    COLOR_CARD_TARGET = lv_color_hex(0x080a0e);
+    COLOR_BTN_START = lv_color_hex(0x06990c);
+    COLOR_BTN_DARK = lv_color_hex(0x000000);
+    COLOR_BTN_ADJ = lv_color_hex(0x1e3c28);
+    COLOR_BORDER = lv_color_hex(0x30363d);
+    COLOR_TEXT_MAIN = lv_color_hex(0xffffff);
+    COLOR_TEXT_SEC = lv_color_hex(0x9ab3a5);
+    COLOR_GREEN = lv_color_hex(0x06990c);
+    COLOR_ADJ_ICON = lv_color_hex(0xc4c4c4);
+}
+
+static lv_obj_t *create_card(lv_obj_t *parent, int x, int y, int w, int h, lv_color_t bg, int radius)
+{
+    lv_obj_t *card = lv_obj_create(parent);
+    lv_obj_set_size(card, w, h);
+    lv_obj_set_pos(card, x, y);
+    lv_obj_set_style_bg_color(card, bg, 0);
+    lv_obj_set_style_radius(card, radius, 0);
+    lv_obj_set_style_border_width(card, 0, 0);
+    lv_obj_clear_flag(card, LV_OBJ_FLAG_SCROLLABLE);
+    return card;
+}
 
 RetCode packer_ui_create(void)
 {
+    set_colors();
+
     packer_scr = lv_obj_create(NULL);
     lv_obj_set_style_bg_color(packer_scr, COLOR_BG, 0);
     lv_obj_set_size(packer_scr, 800, 480);
     lv_obj_clear_flag(packer_scr, LV_OBJ_FLAG_SCROLLABLE);
 
-    header = lv_obj_create(packer_scr);
-    lv_obj_set_size(header, 800, 60);
-    lv_obj_set_pos(header, 0, 0);
-    lv_obj_set_style_bg_color(header, COLOR_HEADER_BG, 0);
-    lv_obj_set_style_radius(header, 0, 0);
-    lv_obj_clear_flag(header, LV_OBJ_FLAG_SCROLLABLE);
+    card_status = create_card(packer_scr, 10, 10, 560, 330, COLOR_CARD, 20);
 
-    weight_panel = lv_obj_create(packer_scr);
-    lv_obj_set_size(weight_panel, 560, 400);
-    lv_obj_set_pos(weight_panel, 10, 70);
-    lv_obj_set_style_bg_color(weight_panel, COLOR_CARD, 0);
-    lv_obj_set_style_radius(weight_panel, 10, 0);
-    lv_obj_set_style_border_width(weight_panel, 2, 0);
-    lv_obj_set_style_border_color(weight_panel, COLOR_BORDER, 0);
-    lv_obj_clear_flag(weight_panel, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_t *w_title = lv_label_create(card_status);
+    lv_label_set_text(w_title, "当前重量");
+    lv_obj_set_style_text_font(w_title, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(w_title, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(w_title, 103, 14);
 
-    lv_obj_t *set_weight_title = lv_label_create(weight_panel);
-    lv_label_set_text(set_weight_title, "设置重量");
-    lv_obj_set_style_text_font(set_weight_title, &custom_cjk_40, 0);
-    lv_obj_set_style_text_color(set_weight_title, COLOR_TEXT, 0);
-    lv_obj_set_pos(set_weight_title, 39, 101);
+    label_current_weight = lv_label_create(card_status);
+    lv_label_set_text(label_current_weight, "0.0");
+    lv_obj_set_style_text_font(label_current_weight, &custom_cjk_40, 0);
+    lv_obj_set_style_text_color(label_current_weight, COLOR_TEXT_MAIN, 0);
+    lv_obj_set_pos(label_current_weight, 82, 64);
 
-    set_weight_label = lv_label_create(weight_panel);
-    char weight_str[20];
-    snprintf(weight_str, sizeof(weight_str), "%lug", target_weight / 10);
-    lv_label_set_text(set_weight_label, weight_str);
-    lv_obj_set_style_text_font(set_weight_label, &custom_cjk_40, 0);
-    lv_obj_set_style_text_color(set_weight_label, COLOR_GREEN_BRIGHT, 0);
-    lv_obj_set_pos(set_weight_label, 239, 101);
+    lv_obj_t *w_unit = lv_label_create(card_status);
+    lv_label_set_text(w_unit, "克");
+    lv_obj_set_style_text_font(w_unit, &custom_cjk_20, 0);
+    lv_obj_set_style_text_color(w_unit, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(w_unit, 140, 60);
 
-    minus_btn = lv_obj_create(weight_panel);
-    lv_obj_set_size(minus_btn, 80, 80);
-    lv_obj_set_pos(minus_btn, 350, 89);
-    lv_obj_set_style_bg_color(minus_btn, COLOR_BUTTON_DARK, 0);
-    lv_obj_set_style_radius(minus_btn, 20, 0);
-    lv_obj_add_event_cb(minus_btn, weight_dec_cb, LV_EVENT_CLICKED, NULL);
+    lv_obj_t *w_sub = lv_label_create(card_status);
+    lv_label_set_text(w_sub, "称重斗实时值");
+    lv_obj_set_style_text_font(w_sub, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(w_sub, lv_color_hex(0x6f9181), 0);
+    lv_obj_set_pos(w_sub, 25, 105);
 
-    lv_obj_t *minus_line = lv_obj_create(minus_btn);
-    lv_obj_set_size(minus_line, 40, 5);
-    lv_obj_set_style_bg_color(minus_line, COLOR_TEXT, 0);
-    lv_obj_align(minus_line, LV_ALIGN_CENTER, 0, 0);
+    lv_obj_t *div_line = lv_obj_create(card_status);
+    lv_obj_set_size(div_line, 500, 1);
+    lv_obj_set_pos(div_line, 25, 140);
+    lv_obj_set_style_bg_color(div_line, COLOR_BORDER, 0);
+    lv_obj_clear_flag(div_line, LV_OBJ_FLAG_SCROLLABLE);
 
-    plus_btn = lv_obj_create(weight_panel);
-    lv_obj_set_size(plus_btn, 80, 80);
-    lv_obj_set_pos(plus_btn, 470, 90);
-    lv_obj_set_style_bg_color(plus_btn, COLOR_BUTTON_DARK, 0);
-    lv_obj_set_style_radius(plus_btn, 20, 0);
-    lv_obj_add_event_cb(plus_btn, weight_inc_cb, LV_EVENT_CLICKED, NULL);
+    lv_obj_t *vertical_line = lv_obj_create(card_status);
+    lv_obj_set_size(vertical_line, 1, 287);
+    lv_obj_set_pos(vertical_line, 277, 22);
+    lv_obj_set_style_bg_color(vertical_line, COLOR_BORDER, 0);
+    lv_obj_clear_flag(vertical_line, LV_OBJ_FLAG_SCROLLABLE);
 
-    lv_obj_t *plus_h_line = lv_obj_create(plus_btn);
-    lv_obj_set_size(plus_h_line, 40, 5);
-    lv_obj_set_style_bg_color(plus_h_line, COLOR_TEXT, 0);
-    lv_obj_align(plus_h_line, LV_ALIGN_CENTER, 0, 0);
+    lv_obj_t *c_title = lv_label_create(card_status);
+    lv_label_set_text(c_title, "总包数");
+    lv_obj_set_style_text_font(c_title, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(c_title, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(c_title, 297, 22);
 
-    lv_obj_t *plus_v_line = lv_obj_create(plus_btn);
-    lv_obj_set_size(plus_v_line, 5, 40);
-    lv_obj_set_style_bg_color(plus_v_line, COLOR_TEXT, 0);
-    lv_obj_align(plus_v_line, LV_ALIGN_CENTER, 0, 0);
+    label_pack_count = lv_label_create(card_status);
+    lv_label_set_text(label_pack_count, "0");
+    lv_obj_set_style_text_font(label_pack_count, &custom_cjk_40, 0);
+    lv_obj_set_style_text_color(label_pack_count, COLOR_TEXT_MAIN, 0);
+    lv_obj_set_pos(label_pack_count, 297, 50);
 
-    control_panel = lv_obj_create(packer_scr);
-    lv_obj_set_size(control_panel, 200, 400);
-    lv_obj_set_pos(control_panel, 590, 70);
-    lv_obj_set_style_bg_color(control_panel, COLOR_CARD, 0);
-    lv_obj_set_style_radius(control_panel, 10, 0);
-    lv_obj_set_style_border_width(control_panel, 2, 0);
-    lv_obj_set_style_border_color(control_panel, COLOR_BORDER, 0);
-    lv_obj_clear_flag(control_panel, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_t *c_unit = lv_label_create(card_status);
+    lv_label_set_text(c_unit, "包");
+    lv_obj_set_style_text_font(c_unit, &custom_cjk_20, 0);
+    lv_obj_set_style_text_color(c_unit, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(c_unit, 390, 60);
 
-    start_btn = lv_obj_create(control_panel);
-    lv_obj_set_size(start_btn, 159, 190);
-    lv_obj_set_pos(start_btn, 20, 20);
-    lv_obj_set_style_bg_color(start_btn, COLOR_GREEN, 0);
-    lv_obj_set_style_radius(start_btn, 20, 0);
-    lv_obj_add_event_cb(start_btn, start_stop_cb, LV_EVENT_CLICKED, NULL);
+    lv_obj_t *c_sub = lv_label_create(card_status);
+    lv_label_set_text(c_sub, "累计成品");
+    lv_obj_set_style_text_font(c_sub, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(c_sub, lv_color_hex(0x6f9181), 0);
+    lv_obj_set_pos(c_sub, 297, 110);
 
-    lv_obj_t *btn_label = lv_label_create(start_btn);
-    lv_label_set_text(btn_label, "启动");
-    lv_obj_set_style_text_font(btn_label, &custom_cjk_30, 0);
-    lv_obj_set_style_text_color(btn_label, COLOR_TEXT, 0);
-    lv_obj_align(btn_label, LV_ALIGN_TOP_MID, 0, 73);
+    lv_obj_t *status_bg = create_card(card_status, 318, 196, 224, 71, COLOR_CARD, 30);
 
-    lv_obj_t *btn_hint = lv_label_create(start_btn);
-    lv_label_set_text(btn_hint, "按此启动");
-    lv_obj_set_style_text_font(btn_hint, &custom_cjk_16, 0);
-    lv_obj_set_style_text_color(btn_hint, COLOR_TEXT, 0);
-    lv_obj_align(btn_hint, LV_ALIGN_TOP_MID, 0, 160);
+    status_dot = lv_obj_create(status_bg);
+    lv_obj_set_size(status_dot, 34, 35);
+    lv_obj_set_style_radius(status_dot, 17, 0);
+    lv_obj_set_style_border_width(status_dot, 0, 0);
+    lv_obj_set_style_bg_color(status_dot, COLOR_GREEN, 0);
+    lv_obj_set_pos(status_dot, 22, 9);
 
-    lv_obj_t *weight_title = lv_label_create(control_panel);
-    lv_label_set_text(weight_title, "当前重量");
-    lv_obj_set_style_text_font(weight_title, &custom_cjk_16, 0);
-    lv_obj_set_style_text_color(weight_title, COLOR_TEXT, 0);
-    lv_obj_set_pos(weight_title, 30, 218);
+    label_status = lv_label_create(status_bg);
+    lv_label_set_text(label_status, "已停止");
+    lv_obj_set_style_text_font(label_status, &custom_cjk_30, 0);
+    lv_obj_set_style_text_color(label_status, COLOR_TEXT_SEC, 0);
+    lv_obj_align(label_status, LV_ALIGN_RIGHT_MID, -20, 0);
 
-    weight_label = lv_label_create(control_panel);
-    lv_label_set_text(weight_label, "0.0g");
-    lv_obj_set_style_text_font(weight_label, &custom_cjk_20, 0);
-    lv_obj_set_style_text_color(weight_label, COLOR_GREEN, 0);
-    lv_obj_set_pos(weight_label, 30, 244);
+    btn_start = lv_btn_create(packer_scr);
+    lv_obj_set_size(btn_start, 210, 330);
+    lv_obj_set_pos(btn_start, 580, 10);
+    lv_obj_set_style_bg_color(btn_start, COLOR_BTN_START, 0);
+    lv_obj_set_style_radius(btn_start, 20, 0);
+    lv_obj_clear_flag(btn_start, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_event_cb(btn_start, start_cb, LV_EVENT_CLICKED, NULL);
 
-    lv_obj_t *count_title = lv_label_create(control_panel);
-    lv_label_set_text(count_title, "包装计数");
-    lv_obj_set_style_text_font(count_title, &custom_cjk_16, 0);
-    lv_obj_set_style_text_color(count_title, COLOR_TEXT, 0);
-    lv_obj_set_pos(count_title, 30, 280);
+    lv_obj_t *start_lbl = lv_label_create(btn_start);
+    lv_label_set_text(start_lbl, "启动");
+    lv_obj_set_style_text_font(start_lbl, &custom_cjk_30, 0);
+    lv_obj_set_style_text_color(start_lbl, COLOR_TEXT_MAIN, 0);
+    lv_obj_align(start_lbl, LV_ALIGN_CENTER, 0, 0);
 
-    count_label = lv_label_create(control_panel);
-    char count_str[20];
-    snprintf(count_str, sizeof(count_str), "%lu", pack_count);
-    lv_label_set_text(count_label, count_str);
-    lv_obj_set_style_text_font(count_label, &custom_cjk_20, 0);
-    lv_obj_set_style_text_color(count_label, COLOR_GREEN, 0);
-    lv_obj_set_pos(count_label, 30, 300);
+    card_target = create_card(packer_scr, 10, 350, 560, 120, COLOR_CARD_TARGET, 20);
 
-    lv_obj_t *status_title = lv_label_create(control_panel);
-    lv_label_set_text(status_title, "运行状态");
-    lv_obj_set_style_text_font(status_title, &custom_cjk_16, 0);
-    lv_obj_set_style_text_color(status_title, COLOR_TEXT, 0);
-    lv_obj_set_pos(status_title, 30, 335);
+    lv_obj_t *t_title = lv_label_create(card_target);
+    lv_label_set_text(t_title, "设计重量");
+    lv_obj_set_style_text_font(t_title, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(t_title, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(t_title, 25, 15);
 
-    status_label = lv_label_create(control_panel);
-    lv_label_set_text(status_label, "已停止");
-    lv_obj_set_style_text_font(status_label, &custom_cjk_20, 0);
-    lv_obj_set_style_text_color(status_label, COLOR_RED, 0);
-    lv_obj_set_pos(status_label, 28, 361);
+    label_target_val = lv_label_create(card_target);
+    char tmp[20];
+    snprintf(tmp, sizeof(tmp), "%lu.%lu", (unsigned long)(target_weight / 10), (unsigned long)(target_weight % 10));
+    lv_label_set_text(label_target_val, tmp);
+    lv_obj_set_style_text_font(label_target_val, &custom_cjk_40, 0);
+    lv_obj_set_style_text_color(label_target_val, COLOR_TEXT_MAIN, 0);
+    lv_obj_set_pos(label_target_val, 25, 40);
+
+    lv_obj_t *t_unit = lv_label_create(card_target);
+    lv_label_set_text(t_unit, "克/包");
+    lv_obj_set_style_text_font(t_unit, &custom_cjk_16, 0);
+    lv_obj_set_style_text_color(t_unit, COLOR_TEXT_SEC, 0);
+    lv_obj_set_pos(t_unit, 130, 50);
+
+    btn_minus = lv_btn_create(card_target);
+    lv_obj_set_size(btn_minus, 60, 60);
+    lv_obj_set_pos(btn_minus, 331, 30);
+    lv_obj_set_style_bg_color(btn_minus, COLOR_BTN_ADJ, 0);
+    lv_obj_set_style_radius(btn_minus, 30, 0);
+    lv_obj_clear_flag(btn_minus, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_event_cb(btn_minus, minus_cb, LV_EVENT_CLICKED, NULL);
+
+    lv_obj_t *minus_lbl = lv_label_create(btn_minus);
+    lv_label_set_text(minus_lbl, "-");
+    lv_obj_set_style_text_font(minus_lbl, &custom_cjk_30, 0);
+    lv_obj_set_style_text_color(minus_lbl, COLOR_TEXT_MAIN, 0);
+    lv_obj_align(minus_lbl, LV_ALIGN_CENTER, 0, 0);
+
+    btn_plus = lv_btn_create(card_target);
+    lv_obj_set_size(btn_plus, 60, 60);
+    lv_obj_set_pos(btn_plus, 463, 30);
+    lv_obj_set_style_bg_color(btn_plus, COLOR_BTN_ADJ, 0);
+    lv_obj_set_style_radius(btn_plus, 30, 0);
+    lv_obj_clear_flag(btn_plus, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_event_cb(btn_plus, plus_cb, LV_EVENT_CLICKED, NULL);
+
+    lv_obj_t *plus_lbl = lv_label_create(btn_plus);
+    lv_label_set_text(plus_lbl, "+");
+    lv_obj_set_style_text_font(plus_lbl, &custom_cjk_30, 0);
+    lv_obj_set_style_text_color(plus_lbl, COLOR_TEXT_MAIN, 0);
+    lv_obj_align(plus_lbl, LV_ALIGN_CENTER, 0, 0);
+
+    btn_reset = lv_btn_create(packer_scr);
+    lv_obj_set_size(btn_reset, 210, 120);
+    lv_obj_set_pos(btn_reset, 580, 350);
+    lv_obj_set_style_bg_color(btn_reset, COLOR_BTN_DARK, 0);
+    lv_obj_set_style_radius(btn_reset, 20, 0);
+    lv_obj_clear_flag(btn_reset, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_event_cb(btn_reset, reset_cb, LV_EVENT_CLICKED, NULL);
+
+    lv_obj_t *reset_lbl = lv_label_create(btn_reset);
+    lv_label_set_text(reset_lbl, "复位");
+    lv_obj_set_style_text_font(reset_lbl, &custom_cjk_30, 0);
+    lv_obj_set_style_text_color(reset_lbl, COLOR_TEXT_SEC, 0);
+    lv_obj_align(reset_lbl, LV_ALIGN_CENTER, 0, 0);
 
     lv_scr_load(packer_scr);
+    update_display();
     return RET_OK;
 }
 
-static void start_stop_cb(lv_event_t *e)
+static void start_cb(lv_event_t *e)
 {
     (void)e;
-    is_running = !is_running;
-    update_status_display();
+    is_running = true;
+    current_weight = 0;
+    LOG_INFO("Start button pressed, target=%lu.%lug",
+             (unsigned long)(target_weight / 10), (unsigned long)(target_weight % 10));
+    update_display();
 }
 
-static void weight_dec_cb(lv_event_t *e)
+static void reset_cb(lv_event_t *e)
 {
     (void)e;
-    if (is_running) return;
-    if (target_weight > 10) {
+    LOG_INFO("Reset button pressed, total packs=%lu", (unsigned long)pack_count);
+    is_running = false;
+    current_weight = 0;
+    pack_count = 0;
+    update_display();
+}
+
+static void minus_cb(lv_event_t *e)
+{
+    (void)e;
+    if (is_running)
+        return;
+    if (target_weight > 10)
+    {
         target_weight -= 10;
-        char weight_str[20];
-        snprintf(weight_str, sizeof(weight_str), "%lug", target_weight / 10);
-        lv_label_set_text(set_weight_label, weight_str);
+        char tmp[20];
+        snprintf(tmp, sizeof(tmp), "%lu.%lu", (unsigned long)(target_weight / 10), (unsigned long)(target_weight % 10));
+        lv_label_set_text(label_target_val, tmp);
+        LOG_INFO("Target weight decreased to %s", tmp);
     }
 }
 
-static void weight_inc_cb(lv_event_t *e)
+static void plus_cb(lv_event_t *e)
 {
     (void)e;
-    if (is_running) return;
-    if (target_weight < 1000) {
+    if (is_running)
+        return;
+    if (target_weight < 2000)
+    {
         target_weight += 10;
-        char weight_str[20];
-        snprintf(weight_str, sizeof(weight_str), "%lug", target_weight / 10);
-        lv_label_set_text(set_weight_label, weight_str);
+        char tmp[20];
+        snprintf(tmp, sizeof(tmp), "%lu.%lu", (unsigned long)(target_weight / 10), (unsigned long)(target_weight % 10));
+        lv_label_set_text(label_target_val, tmp);
+        LOG_INFO("Target weight increased to %s", tmp);
     }
 }
 
-static void update_status_display()
+static void update_display(void)
 {
-    if (is_running) {
-        lv_label_set_text(status_label, "运行中");
-        lv_obj_set_style_text_color(status_label, COLOR_GREEN, 0);
-        lv_label_set_text(lv_obj_get_child(start_btn, 0), "停止");
-        lv_obj_set_style_bg_color(start_btn, COLOR_RED, 0);
-    } else {
-        lv_label_set_text(status_label, "已停止");
-        lv_obj_set_style_text_color(status_label, COLOR_RED, 0);
-        lv_label_set_text(lv_obj_get_child(start_btn, 0), "启动");
-        lv_obj_set_style_bg_color(start_btn, COLOR_GREEN, 0);
+    char tmp[32];
+
+    snprintf(tmp, sizeof(tmp), "%lu.%lu", (unsigned long)(current_weight / 10), (unsigned long)(current_weight % 10));
+    lv_label_set_text(label_current_weight, tmp);
+
+    snprintf(tmp, sizeof(tmp), "%lu", (unsigned long)pack_count);
+    lv_label_set_text(label_pack_count, tmp);
+
+    if (is_running)
+    {
+        lv_label_set_text(label_status, "运行中");
+        lv_obj_set_style_text_color(label_status, COLOR_GREEN, 0);
+        lv_obj_set_style_bg_color(status_dot, COLOR_GREEN, 0);
+    }
+    else
+    {
+        lv_label_set_text(label_status, "已停止");
+        lv_obj_set_style_text_color(label_status, COLOR_TEXT_SEC, 0);
+        lv_obj_set_style_bg_color(status_dot, COLOR_GREEN, 0);
     }
 }
 
 void packer_ui_update(void)
 {
-    if (is_running) {
-        static uint32_t current_weight = 0;
-        if (current_weight < target_weight) {
-            current_weight += 5;
-        } else {
-            current_weight = 0;
-            pack_count++;
-            char count_str[20];
-            snprintf(count_str, sizeof(count_str), "%lu", pack_count);
-            lv_label_set_text(count_label, count_str);
-        }
-
-        char weight_str[20];
-        snprintf(weight_str, sizeof(weight_str), "%lu.%lug", current_weight / 10, current_weight % 10);
-        lv_label_set_text(weight_label, weight_str);
-    }
+    update_display();
 }
 
 void packer_ui_destroy(void)
 {
-    if (packer_scr) {
+    if (packer_scr)
+    {
         lv_obj_del(packer_scr);
         packer_scr = NULL;
     }
diff --git a/tools/capture_log.py b/tools/capture_log.py
new file mode 100644
index 0000000..e7ba9de
--- /dev/null
+++ b/tools/capture_log.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""
+Serial log capture tool for LSPi Project.
+Captures device debug output and saves to timestamped log files.
+
+Usage:
+    python tools/capture_log.py                    # Auto-detect COM port
+    python tools/capture_log.py --port COM3        # Specify port
+    python tools/capture_log.py --port COM3 --baud 9600 --output logs/
+"""
+
+import serial
+import serial.tools.list_ports
+import datetime
+import argparse
+import os
+import sys
+import signal
+
+def find_device_port():
+    ports = serial.tools.list_ports.comports()
+    for p in ports:
+        if p.vid is not None:
+            return p.device
+    if ports:
+        return ports[0].device
+    return None
+
+def main():
+    parser = argparse.ArgumentParser(description="LSPi Serial Log Capture")
+    parser.add_argument("--port", "-p", default=None, help="Serial port (e.g. COM3)")
+    parser.add_argument("--baud", "-b", type=int, default=9600, help="Baud rate (default: 9600)")
+    parser.add_argument("--output", "-o", default="logs", help="Output directory (default: logs)")
+    args = parser.parse_args()
+
+    port = args.port
+    if port is None:
+        port = find_device_port()
+        if port is None:
+            print("ERROR: No serial port found. Specify with --port")
+            sys.exit(1)
+        print(f"Auto-detected port: {port}")
+
+    os.makedirs(args.output, exist_ok=True)
+
+    timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
+    log_file = os.path.join(args.output, f"device_log_{timestamp}.txt")
+    latest_link = os.path.join(args.output, "latest.txt")
+
+    print(f"Connecting to {port} @ {args.baud} baud...")
+    print(f"Saving to: {log_file}")
+    print("Press Ctrl+C to stop capture")
+    print("-" * 60)
+
+    ser = serial.Serial(port, args.baud, timeout=0.1)
+    running = True
+
+    def handle_exit(sig, frame):
+        nonlocal running
+        print("\nCapture stopped.")
+        running = False
+
+    signal.signal(signal.SIGINT, handle_exit)
+
+    with open(log_file, "w", encoding="utf-8") as f:
+        f.write(f"LSPi Device Log Capture\n")
+        f.write(f"Port: {port} @ {args.baud} baud\n")
+        f.write(f"Started: {datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}\n")
+        f.write("=" * 60 + "\n")
+
+        while running:
+            try:
+                line = ser.readline().decode("utf-8", errors="replace").rstrip()
+                if line:
+                    now = datetime.datetime.now().strftime("%H:%M:%S.%f")[:-3]
+                    output = f"[{now}] {line}"
+                    print(output)
+                    f.write(output + "\n")
+                    f.flush()
+            except serial.SerialException:
+                print("ERROR: Connection lost")
+                break
+
+    ser.close()
+
+    if os.path.exists(latest_link):
+        os.remove(latest_link)
+    try:
+        os.symlink(os.path.basename(log_file), latest_link)
+    except:
+        pass
+
+    print(f"\nLog saved to: {log_file}")
+
+if __name__ == "__main__":
+    main()