diff --git a/backend/download_app/download.php b/backend/download_app/download.php
new file mode 100644
index 0000000..b1809e6
--- /dev/null
+++ b/backend/download_app/download.php
@@ -0,0 +1,47 @@
+ false,
+ 'message' => '未找到 APK 文件'
+ ]);
+ exit;
+}
+
+// 解析 APK 文件名中的日期，格式: __UNI__8A0DE5E__20260424215857.apk
+// 日期部分: 20260424215857 (YYYYMMDDHHmmss)
+$latestFile = null;
+$latestDate = 0;
+
+foreach ($apkFiles as $file) {
+ $filename = basename($file);
+
+ // 提取日期部分 (文件名最后一段，移除 .apk 后缀)
+ if (preg_match('/(\d{14})\.apk$/i', $filename, $matches)) {
+ $date = intval($matches[1]);
+ if ($date > $latestDate) {
+ $latestDate = $date;
+ $latestFile = $file;
+ }
+ }
+}
+
+if ($latestFile && file_exists($latestFile)) {
+ // 返回当前目录下的 APK 文件路径
+ $relativePath = './' . basename($latestFile);
+
+ echo json_encode([
+ 'success' => true,
+ 'file' => $relativePath,
+ 'date' => substr($latestDate, 0, 8) . ' ' . substr($latestDate, 8, 2) . ':' . substr($latestDate, 10, 2) . ':' . substr($latestDate, 12, 2)
+ ]);
+} else {
+ echo json_encode([
+ 'success' => false,
+ 'message' => 'APK 文件不存在'
+ ]);
+}
diff --git a/backend/download_app/index.php b/backend/download_app/index.php
new file mode 100644
index 0000000..5af811a
--- /dev/null
+++ b/backend/download_app/index.php
@@ -0,0 +1,130 @@
+
+
+
+
+
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+
+
+
+
+
+
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+
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+
+
+
+
+