diff --git a/app/Models/CourseSign.php b/app/Models/CourseSign.php
index 0105595..a522f58 100755
--- a/app/Models/CourseSign.php
+++ b/app/Models/CourseSign.php
@@ -296,15 +296,15 @@ class CourseSign extends SoftDeletesModel
         $years = [];
         if ($start_date && $end_date) {
             // 从开始和结束日期中提取年份范围
-            $startYear = (int)date('Y', strtotime($start_date));
-            $endYear = (int)date('Y', strtotime($end_date));
+            $startYear = (int) date('Y', strtotime($start_date));
+            $endYear = (int) date('Y', strtotime($end_date));
             // 生成所有年份的数组
             for ($year = $startYear; $year <= $endYear; $year++) {
                 $years[] = $year;
             }
         } else {
             // 如果没有提供日期，使用当前年份
-            $years[] = (int)date('Y');
+            $years[] = (int) date('Y');
         }
 
         // 获取这些公司中标记为被投的公司
@@ -320,7 +320,7 @@ class CourseSign extends SoftDeletesModel
             foreach ($projectUsers as $item) {
                 $investDate = $item['investDate'] ?? null;
                 if ($investDate) {
-                    $investYear = (int)date('Y', strtotime($investDate));
+                    $investYear = (int) date('Y', strtotime($investDate));
                     if (in_array($investYear, $years)) {
                         $hasInvestInYears = true;
                         break;
@@ -465,34 +465,50 @@ class CourseSign extends SoftDeletesModel
      * @param bool $retList 是否返回列表，false返回数量，true返回列表
      * @return int|array
      */
-    public static function companyInvestedAfterEnrollment($start_date, $end_date, $retList = false)
+    public static function companyInvestedAfterEnrollment($start_date, $end_date, $course_ids = null, $retList = false)
     {
-        $courseSignsQuery = self::getStudentList($start_date, $end_date, 1);
-        $courseSignsForInvest = $courseSignsQuery->with('user.company')->get();
-        dd($courseSignsForInvest->count());
+        $courseSignsQuery = self::getStudentList($start_date, $end_date, 1, $course_ids);
+        $courseSignsForInvest = $courseSignsQuery->with(['user.company', 'course'])->get();
         $companiesAfterEnrollment = [];
         foreach ($courseSignsForInvest as $sign) {
             if ($sign->user && $sign->user->company && $sign->user->company->is_yh_invested == 1) {
-                $signDate = \Carbon\Carbon::parse($sign->created_at)->format('Y-m-d');
-                // 从 project_users 中获取最早的被投时间
+                // 使用课程开课时间作为入学时间
+                $enrollmentDate = null;
+                if ($sign->course && $sign->course->start_date) {
+                    $enrollmentDate = \Carbon\Carbon::parse($sign->course->start_date)->format('Y-m-d');
+                }
+
+                // 如果没有开课时间，跳过这条记录
+                if (!$enrollmentDate) {
+                    continue;
+                }
+
+                // 从 project_users 中检查是否有任何一个被投时间 >= 课程开课时间
                 $projectUsers = $sign->user->company->project_users;
+                $hasInvestAfterEnrollment = false;
                 $investDate = null;
                 if (!empty($projectUsers) && is_array($projectUsers)) {
                     foreach ($projectUsers as $projectUser) {
                         if (!empty($projectUser['investDate'])) {
-                            if ($investDate === null || $projectUser['investDate'] < $investDate) {
-                                $investDate = $projectUser['investDate'];
+                            $currentInvestDate = $projectUser['investDate'];
+                            // 只要有一个被投时间 >= 课程开课时间，就满足条件
+                            if ($currentInvestDate >= $enrollmentDate) {
+                                $hasInvestAfterEnrollment = true;
+                                // 记录满足条件的被投时间（如果有多个，记录最早的）
+                                if ($investDate === null || $currentInvestDate < $investDate) {
+                                    $investDate = $currentInvestDate;
+                                }
                             }
                         }
                     }
                 }
-                // 被投时间 >= 报名时间，说明是入学后被投
-                if ($investDate && $investDate >= $signDate) {
+                // 只要有一个被投时间 >= 课程开课时间，说明是入学后被投
+                if ($hasInvestAfterEnrollment && $investDate) {
                     $companyId = $sign->user->company->id;
                     if (!isset($companiesAfterEnrollment[$companyId])) {
                         $companiesAfterEnrollment[$companyId] = [
                             'company' => $sign->user->company,
-                            'first_sign_date' => $signDate,
+                            'first_sign_date' => $enrollmentDate,
                             'invest_date' => $investDate,
                             'users' => [],
                         ];