diff --git a/app/Models/CourseSign.php b/app/Models/CourseSign.php
index e7178c7..18150b4 100755
--- a/app/Models/CourseSign.php
+++ b/app/Models/CourseSign.php
@@ -152,17 +152,23 @@ class CourseSign extends SoftDeletesModel
      */
     public static function yhInvested($start_date = null, $end_date = null, $retList = false)
     {
-        $courseSignByTypeQuery = self::getStudentList($start_date, $end_date, 1, null);
-        $list = Company::whereHas('users', function ($query) use ($courseSignByTypeQuery) {
-            $query->whereIn('id', $courseSignByTypeQuery->get()->pluck('user_id'));
-        })->where('is_yh_invested', 1)->get();
-        if ($retList) {
-            // 返回列表
-            return $list;
-        } else {
-            // 返回统计数据
-            return $list->count();
+        $userIds = self::getStudentList($start_date, $end_date, 1, null)->get()->pluck('user_id');
+        $companies = Company::whereHas('users', fn($q) => $q->whereIn('id', $userIds))
+            ->where('is_yh_invested', 1)->get();
+
+        // 非默认时间：按 investDate 筛选
+        if ($start_date && $start_date != CourseType::START_DATE) {
+            $startDate = substr($start_date, 0, 10);
+            $endDate = substr($end_date, 0, 10);
+            $companies = $companies->filter(function ($company) use ($startDate, $endDate) {
+                return collect($company->project_users ?? [])->contains(function ($item) use ($startDate, $endDate) {
+                    $investDate = $item['investDate'] ?? null;
+                    return $investDate && $investDate >= $startDate && $investDate <= $endDate;
+                });
+            });
         }
+
+        return $retList ? $companies->values() : $companies->count();
     }
 
     /**
@@ -341,10 +347,21 @@ class CourseSign extends SoftDeletesModel
 
         // 检测关键词
         $companyNameKeyword = [
-            '元禾控股', '元禾原点', '元禾厚望', '元禾重元',
-            '元禾璞华', '元禾谷风', '元禾绿柳', '元禾辰坤', '元禾沙湖',
-            '禾裕集团', '苏州科服', '信诚管理咨询',
-            '集成电路公司', '常州团队', '国企元禾'
+            '元禾控股',
+            '元禾原点',
+            '元禾厚望',
+            '元禾重元',
+            '元禾璞华',
+            '元禾谷风',
+            '元禾绿柳',
+            '元禾辰坤',
+            '元禾沙湖',
+            '禾裕集团',
+            '苏州科服',
+            '信诚管理咨询',
+            '集成电路公司',
+            '常州团队',
+            '国企元禾'
         ];
         $company = Company::where(function ($query) use ($companyNameKeyword) {
             foreach ($companyNameKeyword as $item) {