diff --git a/app/common/service/UsedCarDetailService.php b/app/common/service/UsedCarDetailService.php
index 4f90c97..4b93076 100644
--- a/app/common/service/UsedCarDetailService.php
+++ b/app/common/service/UsedCarDetailService.php
@@ -10,6 +10,9 @@ use support\exception\BusinessException;
 use support\Log;
 use support\Request;
 use support\Redis;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\GuzzleException;
+use QL\QueryList;
 
 class UsedCarDetailService
 {
@@ -175,6 +178,21 @@ class UsedCarDetailService
             }
         }
 
+        // 如果提供了 crawl_car_id，自动抓取懂车帝车辆参数
+        if (!empty($data['crawl_car_id'])) {
+            try {
+                $params = $this->crawlParams($data['crawl_car_id']);
+                // 合并抓取的数据，手动提交的字段优先级更高
+                $data = array_merge($params, $data);
+            } catch (\Throwable $e) {
+                // 抓取失败不阻断创建，记录日志
+                Log::warning('抓取车辆参数失败', [
+                    'crawl_car_id' => $data['crawl_car_id'],
+                    'error' => $e->getMessage(),
+                ]);
+            }
+        }
+
         return $data;
     }
 
@@ -448,4 +466,374 @@ class UsedCarDetailService
             'total' => $query->count(),
         ];
     }
+
+    /**
+     * 抓取懂车帝车辆参数
+     *
+     * @param string $crawlCarId 车型ID
+     * @return array 格式化后的参数数据
+     * @throws BusinessException
+     */
+    public function crawlParams(string $crawlCarId): array
+    {
+        $url = 'https://www.dongchedi.com/auto/params-carIds-' . $crawlCarId;
+
+        // 请求头配置
+        $headers = [
+            'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+            'Accept-Language' => 'zh-CN,zh;q=0.9',
+            'Referer' => 'https://www.dongchedi.com/',
+        ];
+
+        try {
+            $client = new Client();
+            $response = $client->request('GET', $url, [
+                'headers' => $headers,
+                'timeout' => 10,
+                'verify' => false,  // 禁用SSL验证
+            ]);
+
+            $html = (string)$response->getBody();
+
+            if (empty($html)) {
+                throw new BusinessException('页面内容为空');
+            }
+
+            // 解析HTML获取JSON数据
+            $ql = QueryList::html($html);
+            $jsonText = $ql->find('#__NEXT_DATA__')->text();
+
+            if (empty($jsonText)) {
+                throw new BusinessException('未找到 __NEXT_DATA__ JSON');
+            }
+
+            $raw = json_decode($jsonText, true);
+            if (json_last_error() !== JSON_ERROR_NONE) {
+                throw new BusinessException('JSON解析失败: ' . json_last_error_msg());
+            }
+
+            // 提取数据
+            $properties = $raw['props']['pageProps']['rawData']['properties'] ?? [];
+            $carInfo = $raw['props']['pageProps']['rawData']['car_info'][0] ?? [];
+
+            if (empty($properties) || empty($carInfo)) {
+                throw new BusinessException('数据结构异常，无法提取参数');
+            }
+
+            // 构建值映射表和分组
+            $valuesMap = $this->buildValuesMap($carInfo);
+            $groups = $this->buildCarSpecGroups($properties, $valuesMap);
+
+            // 映射到数据库字段
+            return $this->mapParamsToDbFields($groups, $carInfo);
+
+        } catch (GuzzleException $e) {
+            Log::error('抓取懂车帝参数失败', [
+                'crawl_car_id' => $crawlCarId,
+                'error' => $e->getMessage(),
+            ]);
+            throw new BusinessException('抓取参数失败: ' . $e->getMessage());
+        } catch (\Throwable $e) {
+            Log::error('解析懂车帝参数失败', [
+                'crawl_car_id' => $crawlCarId,
+                'error' => $e->getMessage(),
+            ]);
+            throw new BusinessException('解析参数失败: ' . $e->getMessage());
+        }
+    }
+
+    /**
+     * 构建值映射表
+     */
+    private function buildValuesMap(array $carInfo): array
+    {
+        $valuesMap = [];
+
+        // 顶层字段
+        foreach ($carInfo as $k => $v) {
+            if ($k === 'info' || is_array($v)) {
+                continue;
+            }
+            $valuesMap[$k] = ['value' => $v];
+        }
+
+        // info中的配置项
+        if (!empty($carInfo['info']) && is_array($carInfo['info'])) {
+            foreach ($carInfo['info'] as $k => $v) {
+                if (is_array($v) && array_key_exists('value', $v)) {
+                    $valuesMap[$k] = $v;
+                }
+            }
+        }
+
+        return $valuesMap;
+    }
+
+    /**
+     * 构建车辆规格分组
+     */
+    private function buildCarSpecGroups(array $properties, array $valuesMap): array
+    {
+        $groups = [];
+        $currentKey = null;
+
+        foreach ($properties as $item) {
+            $type = (int)($item['type'] ?? 1);
+            $key = $item['key'] ?? '';
+            $text = $item['text'] ?? '';
+            $subList = $item['sub_list'] ?? null;
+
+            // 分类字段：type = 0 / 2
+            if (in_array($type, [0, 2], true)) {
+                $currentKey = $key ?: ($text ?: ('group_' . count($groups)));
+
+                if (!isset($groups[$currentKey])) {
+                    $groups[$currentKey] = [
+                        'group_key' => $currentKey,
+                        'group_text' => $text,
+                        'group_type' => $type,
+                        'items' => [],
+                    ];
+                }
+
+                continue;
+            }
+
+            // 普通字段：挂到最近的分类下
+            if ($currentKey === null) {
+                $currentKey = '_default';
+                $groups[$currentKey] = [
+                    'group_key' => '_default',
+                    'group_text' => '其他',
+                    'group_type' => -1,
+                    'items' => [],
+                ];
+            }
+
+            $value = '';
+            if ($key && isset($valuesMap[$key])) {
+                $value = trim((string)($valuesMap[$key]['value'] ?? ''));
+            }
+
+            $node = [
+                'key' => $key,
+                'text' => $text,
+                'value' => $value,
+            ];
+
+            if (is_array($subList) && !empty($subList)) {
+                $children = [];
+                foreach ($subList as $sub) {
+                    $subKey = $sub['key'] ?? '';
+                    $subText = $sub['text'] ?? '';
+                    $subValue = '';
+
+                    if ($subKey && isset($valuesMap[$subKey])) {
+                        $subValue = trim((string)($valuesMap[$subKey]['value'] ?? ''));
+                    }
+
+                    $children[] = [
+                        'key' => $subKey,
+                        'text' => $subText,
+                        'value' => $subValue,
+                    ];
+                }
+
+                $node['children'] = $children;
+            }
+
+            $groups[$currentKey]['items'][] = $node;
+        }
+
+        return array_values($groups);
+    }
+
+    /**
+     * 从分组数据中获取字段值
+     */
+    private function getFieldValue($groups, string $field): ?string
+    {
+        if (is_string($groups)) {
+            $groups = json_decode($groups, true);
+            if (json_last_error() !== JSON_ERROR_NONE) {
+                return null;
+            }
+        }
+
+        if (!is_array($groups)) {
+            return null;
+        }
+
+        foreach ($groups as $group) {
+            if (isset($group['items']) && is_array($group['items'])) {
+                foreach ($group['items'] as $item) {
+                    if (($item['key'] ?? null) === $field) {
+                        return $item['value'] ?? null;
+                    }
+
+                    if (!empty($item['children']) && is_array($item['children'])) {
+                        foreach ($item['children'] as $child) {
+                            if (($child['key'] ?? null) === $field) {
+                                return $child['value'] ?? null;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * 解析尺寸字符串 (如 "4890x1890x1680" 转为长宽高)
+     */
+    private function parseDimensions(string $dimensionStr): array
+    {
+        $result = ['body_length' => '', 'body_width' => '', 'body_height' => ''];
+
+        if (empty($dimensionStr)) {
+            return $result;
+        }
+
+        $parts = explode('x', strtolower(str_replace(['×', 'X', 'Ｘ'], 'x', $dimensionStr)));
+        if (count($parts) >= 3) {
+            $result['body_length'] = trim($parts[0]);
+            $result['body_width'] = trim($parts[1]);
+            $result['body_height'] = trim($parts[2]);
+        }
+
+        return $result;
+    }
+
+    /**
+     * 转换安全配置值 (●→标配, ○→选装, -→空)
+     */
+    private function convertSafetyValue(?string $value): string
+    {
+        if ($value === '●') {
+            return '标配';
+        } elseif ($value === '○') {
+            return '选装';
+        } elseif ($value === '-') {
+            return '';
+        }
+        return $value ?? '';
+    }
+
+    /**
+     * 映射参数到数据库字段
+     * DongChedi 字段 → 数据库字段
+     */
+    private function mapParamsToDbFields(array $groups, array $carInfo): array
+    {
+        $result = [];
+
+        // 从 car_info 直接获取的字段
+        $result['official_guide_price'] = $carInfo['official_price'] ?? '';
+
+        // 1. 基本信息
+        $result['manufacturer'] = $this->getFieldValue($groups, 'sub_brand_name') ?? '';
+        $result['level'] = $this->getFieldValue($groups, 'jb') ?? '';
+        $result['energy_type'] = $this->getFieldValue($groups, 'fuel_form') ?? '';
+        $result['listing_time'] = $this->getFieldValue($groups, 'market_time') ?? '';
+        $result['engine'] = $this->getFieldValue($groups, 'engine_description') ?? '';
+        $result['electric_motor'] = $this->getFieldValue($groups, 'electric_description') ?? '';
+        $result['nedc_range'] = $this->parseNumeric($this->getFieldValue($groups, 'nedc_range'));
+        $result['cltc_range'] = $this->parseNumeric($this->getFieldValue($groups, 'cltc_range'));
+        $result['fast_charge_platform'] = $this->getFieldValue($groups, 'fast_charge_platform') ?? '';
+        $result['charging_time'] = $this->parseDecimal($this->getFieldValue($groups, 'charging_time'));
+        $result['fast_charge_percent'] = $this->parseNumeric($this->getFieldValue($groups, 'fast_charge_percent'));
+        $result['max_power_kw'] = $this->parseNumeric($this->getFieldValue($groups, 'energy_elect_max_power'));
+        $result['max_torque_nm'] = $this->parseNumeric($this->getFieldValue($groups, 'energy_elect_max_torque'));
+        $result['transmission_desc'] = $this->getFieldValue($groups, 'gearbox_description') ?? '';
+        $result['dimensions'] = $this->getFieldValue($groups, 'length_width_height') ?? '';
+        $result['body_structure'] = $this->getFieldValue($groups, 'car_body_struct') ?? '';
+        $result['max_speed'] = $this->parseNumeric($this->getFieldValue($groups, 'max_speed'));
+        $result['acceleration_100'] = $this->parseDecimal($this->getFieldValue($groups, 'acceleration_time'));
+        $result['nedc_fuel_consumption'] = $this->parseDecimal($this->getFieldValue($groups, 'fuel_comprehensive'));
+        $result['power_consumption_100'] = $this->parseDecimal($this->getFieldValue($groups, 'power_consumption_100'));
+        $result['equivalent_fuel_consumption'] = $this->parseDecimal($this->getFieldValue($groups, 'equivalent_fuel_consumption'));
+        $result['maintenance_cost_60k'] = $this->parseDecimal($this->getFieldValue($groups, 'maintain_cost'));
+
+        // 2. 车身信息 (解析尺寸)
+        $dimensionStr = $this->getFieldValue($groups, 'length_width_height');
+        $dimensions = $this->parseDimensions($dimensionStr ?? '');
+        $result['body_length'] = $dimensions['body_length'];
+        $result['body_width'] = $dimensions['body_width'];
+        $result['body_height'] = $dimensions['body_height'];
+
+        $result['wheelbase'] = $this->parseNumeric($this->getFieldValue($groups, 'wheelbase'));
+        $result['door_count'] = $this->parseNumeric($this->getFieldValue($groups, 'door_nums'));
+        $result['door_open_type'] = $this->getFieldValue($groups, 'door_open_way') ?? '';
+        $result['seat_count'] = $this->parseNumeric($this->getFieldValue($groups, 'seat_count'));
+
+        // 3. 变速箱
+        $result['gear_count'] = $this->parseNumeric($this->getFieldValue($groups, 'stalls'));
+        $result['transmission_type'] = $this->getFieldValue($groups, 'gearbox_type') ?? '';
+
+        // 4. 底盘/转向
+        $result['drive_mode'] = $this->getFieldValue($groups, 'driver_form') ?? '';
+        $result['front_suspension'] = $this->getFieldValue($groups, 'front_suspension_form') ?? '';
+        $result['rear_suspension'] = $this->getFieldValue($groups, 'rear_suspension_form') ?? '';
+        $result['steering_type'] = $this->getFieldValue($groups, 'power_steering_type') ?? '';
+
+        // 5. 主动安全配置
+        $result['has_abs'] = $this->convertSafetyValue($this->getFieldValue($groups, 'abs_anti_lock'));
+        $result['has_ebd'] = $this->convertSafetyValue($this->getFieldValue($groups, 'brake_force'));
+        $result['has_bra'] = $this->convertSafetyValue($this->getFieldValue($groups, 'brake_assist'));
+        $result['has_tcs'] = $this->convertSafetyValue($this->getFieldValue($groups, 'traction_control'));
+        $result['has_esp'] = $this->convertSafetyValue($this->getFieldValue($groups, 'body_stability_system'));
+        $result['has_active_brake'] = $this->convertSafetyValue($this->getFieldValue($groups, 'active_brake'));
+        $result['has_lane_assist'] = $this->convertSafetyValue($this->getFieldValue($groups, 'line_support'));
+        $result['has_lka'] = $this->convertSafetyValue($this->getFieldValue($groups, 'lane_keeping_assist'));
+        $result['has_lane_centering'] = $this->convertSafetyValue($this->getFieldValue($groups, 'lane_center'));
+        $result['has_fatigue_remind'] = $this->convertSafetyValue($this->getFieldValue($groups, 'fatigue_driving_warning'));
+
+        // 6. 车轮/制动
+        $result['front_brake_type'] = $this->getFieldValue($groups, 'front_brake_type') ?? '';
+        $result['rear_brake_type'] = $this->getFieldValue($groups, 'rear_brake_type') ?? '';
+        $result['parking_brake_type'] = $this->getFieldValue($groups, 'park_brake_type') ?? '';
+        $result['front_tire_spec'] = $this->getFieldValue($groups, 'front_tire_size') ?? '';
+        $result['rear_tire_spec'] = $this->getFieldValue($groups, 'rear_tire_size') ?? '';
+
+        // 确保空字符串不被转为null
+        foreach ($result as $key => $value) {
+            if ($value === null) {
+                $result[$key] = '';
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * 解析数值字段
+     */
+    private function parseNumeric(?string $value): string
+    {
+        if ($value === null || $value === '') {
+            return '';
+        }
+        // 提取数字部分
+        if (preg_match('/\d+/', $value, $matches)) {
+            return $matches[0];
+        }
+        return '';
+    }
+
+    /**
+     * 解析小数
+     */
+    private function parseDecimal(?string $value): string
+    {
+        if ($value === null || $value === '') {
+            return '';
+        }
+        // 提取数字和小数点
+        if (preg_match('/[\d.]+/', $value, $matches)) {
+            return $matches[0];
+        }
+        return '';
+    }
 }
\ No newline at end of file