diff --git a/admin/backend_settings.php b/admin/backend_settings.php
index cea83db..e0c3c66 100644
--- a/admin/backend_settings.php
+++ b/admin/backend_settings.php
@@ -23,6 +23,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         'rate_MYR' => $_POST['rate_MYR'] ?? '',
         'rate_CNY' => $_POST['rate_CNY'] ?? '',
         'rate_EUR' => $_POST['rate_EUR'] ?? '',
+        'ios_download_url' => $_POST['ios_download_url'] ?? '#',
+        'android_download_url' => $_POST['android_download_url'] ?? '#',
+        'apk_download_url' => $_POST['apk_download_url'] ?? '/downloads/byro.apk'
     ];
     
     foreach ($settings as $key => $val) {
@@ -103,6 +106,9 @@ $erc20_addr = getSetting('usdt_erc20_address', '');
 $bep20_addr = getSetting('usdt_bep20_address', '');
 $service_link = getSetting('service_link', '');
 $site_name = getSetting('site_name', 'Byro');
+$ios_url = getSetting('ios_download_url', '#');
+$android_url = getSetting('android_download_url', '#');
+$apk_url = getSetting('apk_download_url', '/downloads/byro.apk');
 
 $title = '后台设置';
 ob_start();
@@ -196,6 +202,21 @@ ob_start();
                     <input type="text" name="usdt_bep20_address" class="form-control" value="<?= htmlspecialchars($bep20_addr) ?>" placeholder="请输入 BEP20 钱包地址">
                 </div>
 
+                <hr class="my-4">
+                <h6 class="fw-bold mb-3 text-primary"><i class="bi bi-phone me-2"></i>APP 下载设置</h6>
+                <div class="mb-3">
+                    <label class="form-label fw-bold">iOS 下载/描述链接</label>
+                    <input type="text" name="ios_download_url" class="form-control" value="<?= htmlspecialchars($ios_url) ?>" placeholder="https://...">
+                </div>
+                <div class="mb-3">
+                    <label class="form-label fw-bold">Android 下载链接 (Google Play)</label>
+                    <input type="text" name="android_download_url" class="form-control" value="<?= htmlspecialchars($android_url) ?>" placeholder="https://...">
+                </div>
+                <div class="mb-3">
+                    <label class="form-label fw-bold">Android APK 直接下载链接</label>
+                    <input type="text" name="apk_download_url" class="form-control" value="<?= htmlspecialchars($apk_url) ?>" placeholder="/downloads/byro.apk">
+                </div>
+
                 <hr class="my-4">
                 <h6 class="fw-bold mb-3 text-primary"><i class="bi bi-currency-exchange me-2"></i>法币汇率配置 (1 USDT = ?)</h6>
                 <div class="row g-3">
@@ -329,4 +350,4 @@ ob_start();
 <?php
 $content = ob_get_clean();
 renderAdminPage($content, $title);
-?>
+?>
\ No newline at end of file
diff --git a/admin/settings.php b/admin/settings.php
deleted file mode 100644
index b39751c..0000000
--- a/admin/settings.php
+++ /dev/null
@@ -1,172 +0,0 @@
-<?php
-require_once __DIR__ . '/../includes/lang.php';
-require_once __DIR__ . '/../db/config.php';
-
-// Simple admin check (in real app, use roles)
-if (!isset($_SESSION['user_id'])) {
-    header('Location: /auth/login.php');
-    exit;
-}
-
-$message = '';
-if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-    $email_verify = isset($_POST['email_verification_enabled']) ? '1' : '0';
-    
-    $settings_to_update = [
-        'email_verification_enabled' => $email_verify,
-        'verification_api_config' => $_POST['verification_api_config'] ?? '',
-        'smtp_host' => $_POST['smtp_host'] ?? '',
-        'smtp_port' => $_POST['smtp_port'] ?? '587',
-        'smtp_user' => $_POST['smtp_user'] ?? '',
-        'smtp_pass' => $_POST['smtp_pass'] ?? '',
-        'smtp_secure' => $_POST['smtp_secure'] ?? 'tls',
-        'mail_from_email' => $_POST['mail_from_email'] ?? '',
-        'mail_from_name' => $_POST['mail_from_name'] ?? 'Byro Exchange',
-        'ios_download_url' => $_POST['ios_download_url'] ?? '#',
-        'android_download_url' => $_POST['android_download_url'] ?? '#',
-        'apk_download_url' => $_POST['apk_download_url'] ?? '/downloads/byro.apk'
-    ];
-
-    foreach ($settings_to_update as $key => $value) {
-        $stmt = db()->prepare("INSERT INTO system_settings (setting_key, setting_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE setting_value = VALUES(setting_value)");
-        $stmt->execute([$key, $value]);
-    }
-    
-    $message = '设置已更新';
-}
-
-$email_verify_enabled = getSetting('email_verification_enabled', '0') === '1';
-$smtp_host = getSetting('smtp_host', '');
-$smtp_port = getSetting('smtp_port', '587');
-$smtp_user = getSetting('smtp_user', '');
-$smtp_pass = getSetting('smtp_pass', '');
-$smtp_secure = getSetting('smtp_secure', 'tls');
-$mail_from_email = getSetting('mail_from_email', '');
-$mail_from_name = getSetting('mail_from_name', 'Byro Exchange');
-
-function getSetting($key, $default = null) {
-    $stmt = db()->prepare("SELECT setting_value FROM system_settings WHERE setting_key = ?");
-    $stmt->execute([$key]);
-    $row = $stmt->fetch();
-    return $row ? $row['setting_value'] : $default;
-}
-
-ob_start();
-?>
-
-<div class="row">
-    <div class="col-md-8 mx-auto">
-        <div class="card shadow-sm border-0">
-            <div class="card-header bg-white py-3">
-                <h5 class="mb-0 fw-bold"><i class="bi bi-gear-fill me-2 text-primary"></i> 注册与邮件设置</h5>
-            </div>
-            <div class="card-body p-4">
-                <?php if ($message): ?>
-                    <div class="alert alert-success alert-dismissible fade show" role="alert">
-                        <i class="bi bi-check-circle-fill me-2"></i><?= $message ?>
-                        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-                    </div>
-                <?php endif; ?>
-
-                <form method="POST">
-                    <div class="mb-4">
-                        <label class="form-label fw-bold">注册验证</label>
-                        <div class="form-check form-switch p-3 bg-light rounded-3 border">
-                            <input class="form-check-input ms-0 me-3" type="checkbox" name="email_verification_enabled" id="email_verify" <?= $email_verify_enabled ? 'checked' : '' ?>>
-                            <label class="form-check-label" for="email_verify">开启邮箱/手机验证码 (注册时必须填写)</label>
-                        </div>
-                        <div class="mt-3">
-                            <label class="form-label small fw-bold text-muted">验证码接口/配置内容 (可在此填写 API Key 或提示信息)</label>
-                            <textarea name="verification_api_config" class="form-control" rows="3" placeholder="例如：接入第三方短信接口的配置信息..."><?= htmlspecialchars(getSetting('verification_api_config', '')) ?></textarea>
-                        </div>
-                        <div class="form-text text-muted mt-2 small">开启后，用户在注册页面必须通过验证码验证。测试环境默认验证码：123456</div>
-                    </div>
-
-                    <hr class="my-4">
-
-                    <h6 class="fw-bold mb-3"><i class="bi bi-envelope-at me-2 text-primary"></i> SMTP 邮件服务设置</h6>
-                    
-                    <div class="row g-3">
-                        <div class="col-md-9">
-                            <label class="form-label small text-muted">SMTP 主机</label>
-                            <input type="text" name="smtp_host" class="form-control" value="<?= htmlspecialchars($smtp_host) ?>" placeholder="例如: smtp.gmail.com">
-                        </div>
-                        <div class="col-md-3">
-                            <label class="form-label small text-muted">端口</label>
-                            <input type="text" name="smtp_port" class="form-control" value="<?= htmlspecialchars($smtp_port) ?>" placeholder="587">
-                        </div>
-                        
-                        <div class="col-md-6">
-                            <label class="form-label small text-muted">账号 / 邮箱</label>
-                            <input type="text" name="smtp_user" class="form-control" value="<?= htmlspecialchars($smtp_user) ?>" placeholder="your-email@example.com">
-                        </div>
-                        <div class="col-md-6">
-                            <label class="form-label small text-muted">授权码 / 密码</label>
-                            <input type="password" name="smtp_pass" class="form-control" value="<?= htmlspecialchars($smtp_pass) ?>" placeholder="********">
-                        </div>
-
-                        <div class="col-md-6">
-                            <label class="form-label small text-muted">安全协议</label>
-                            <select name="smtp_secure" class="form-select">
-                                <option value="tls" <?= $smtp_secure === 'tls' ? 'selected' : '' ?>>TLS (推荐)</option>
-                                <option value="ssl" <?= $smtp_secure === 'ssl' ? 'selected' : '' ?>>SSL</option>
-                                <option value="none" <?= $smtp_secure === 'none' ? 'selected' : '' ?>>无</option>
-                            </select>
-                        </div>
-                        
-                        <div class="col-md-6">
-                            <label class="form-label small text-muted">发件人姓名</label>
-                            <input type="text" name="mail_from_name" class="form-control" value="<?= htmlspecialchars($mail_from_name) ?>" placeholder="Byro Exchange">
-                        </div>
-
-                        <div class="col-md-12">
-                            <label class="form-label small text-muted">发件人邮箱</label>
-                            <input type="email" name="mail_from_email" class="form-control" value="<?= htmlspecialchars($mail_from_email) ?>" placeholder="no-reply@yourdomain.com">
-                        </div>
-                    </div>
-
-                    <hr class="my-4">
-
-                    <h6 class="fw-bold mb-3"><i class="bi bi-phone me-2 text-primary"></i> APP 下载设置</h6>
-                    
-                    <div class="row g-3">
-                        <div class="col-md-12">
-                            <label class="form-label small text-muted">iOS 下载链接 (App Store)</label>
-                            <input type="text" name="ios_download_url" class="form-control" value="<?= htmlspecialchars(getSetting('ios_download_url', '#')) ?>" placeholder="https://apps.apple.com/app/...">
-                        </div>
-                        <div class="col-md-12">
-                            <label class="form-label small text-muted">Android 下载链接 (Google Play)</label>
-                            <input type="text" name="android_download_url" class="form-control" value="<?= htmlspecialchars(getSetting('android_download_url', '#')) ?>" placeholder="https://play.google.com/store/apps/...">
-                        </div>
-                        <div class="col-md-12">
-                            <label class="form-label small text-muted">Android APK 直接下载链接</label>
-                            <div class="input-group">
-                                <input type="text" name="apk_download_url" class="form-control" value="<?= htmlspecialchars(getSetting('apk_download_url', '/downloads/byro.apk')) ?>" placeholder="/downloads/byro.apk">
-                                <span class="input-group-text bg-light"><i class="bi bi-info-circle" title="建议将 APK 文件上传到 /downloads/ 目录下并在此填入路径"></i></span>
-                            </div>
-                        </div>
-                    </div>
-
-                    <div class="mt-5 text-end">
-                        <button type="submit" class="btn btn-primary px-5 py-2 fw-bold rounded-pill shadow-sm">
-                            保存所有设置
-                        </button>
-                    </div>
-                </form>
-            </div>
-        </div>
-        
-        <div class="mt-4 p-4 bg-info bg-opacity-10 border border-info border-opacity-20 rounded-4">
-            <h6 class="fw-bold text-info mb-2"><i class="bi bi-info-circle-fill me-2"></i> 关于短信验证</h6>
-            <p class="small text-muted mb-0">
-                目前系统通过邮件服务发送验证码。手机号注册将同样通过绑定的邮件或系统预设通道发送。如需接入特定短信网关，请联系技术支持对接 API。
-            </p>
-        </div>
-    </div>
-</div>
-
-<?php 
-$content = ob_get_clean();
-require_once __DIR__ . '/layout.php';
-renderAdminPage($content, '注册与邮件设置');
-?>