diff --git a/assets/admin/src/pages/users/UsersSignin.vue b/assets/admin/src/pages/users/UsersSignin.vue
index 4f8c0b9c..35599db1 100644
--- a/assets/admin/src/pages/users/UsersSignin.vue
+++ b/assets/admin/src/pages/users/UsersSignin.vue
@@ -249,8 +249,8 @@ async function load() {
     form.invite_register_field = authData.invite_register_field || 'optional'
     form.invite_reject_invalid = authData.invite_reject_invalid !== false
 
-    captchaSummary.register = !!captchaData.enabled && !disabledScenarios.includes('register')
-    captchaSummary.signin = !!captchaData.enabled && !disabledScenarios.includes('signin')
+    captchaSummary.register = !!captchaData.enabled && !!captchaData.active_provider && !disabledScenarios.includes('register')
+    captchaSummary.signin = !!captchaData.enabled && !!captchaData.active_provider && !disabledScenarios.includes('signin')
   } catch (error) {
     message.error(error.message || '加载签到奖励配置失败')
   } finally {
diff --git a/assets/js/sign-register.js b/assets/js/sign-register.js
index 14e9323c..b82cde6f 100644
--- a/assets/js/sign-register.js
+++ b/assets/js/sign-register.js
@@ -205,35 +205,53 @@
       submitBtn.textContent = '注册中...'
     }
 
-    const captchaData = collectCaptchaFields(form)
-
-    fetch(REST_BASE + '/auth/phone-register', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ phone, code, password, invite_code: inviteCode, ...captchaData }),
-    })
-      .then(r => r.json().then(data => ({ ok: r.ok, data })))
-      .then(({ ok, data }) => {
-        if (ok && data.success) {
-          showToast(data.message || '注册成功', 'success')
-          setTimeout(() => {
-            window.location.href = data.data?.redirect || '/'
-          }, 500)
-        } else {
-          showToast(data.message || '注册失败', 'error')
+    const captchaState = window.AKSRTCaptchaState
+    const doRegister = () => {
+      const captchaData = collectCaptchaFields(form)
+      fetch(REST_BASE + '/auth/phone-register', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ phone, code, password, invite_code: inviteCode, ...captchaData }),
+      })
+        .then(r => r.json().then(data => ({ ok: r.ok, data })))
+        .then(({ ok, data }) => {
+          if (ok && data.success) {
+            showToast(data.message || '注册成功', 'success')
+            setTimeout(() => {
+              window.location.href = data.data?.redirect || '/'
+            }, 500)
+          } else {
+            showToast(data.message || '注册失败', 'error')
+            try {
+              if (captchaState && captchaState.scenes && captchaState.scenes.register) {
+                captchaState.scenes.register.reset()
+              }
+            } catch (e) { /* ignore */ }
+            if (submitBtn) {
+              submitBtn.disabled = false
+              submitBtn.textContent = '注册'
+            }
+          }
+        })
+        .catch(() => {
+          showToast('网络错误', 'error')
+          try {
+            if (captchaState && captchaState.scenes && captchaState.scenes.register) {
+              captchaState.scenes.register.reset()
+            }
+          } catch (e) { /* ignore */ }
           if (submitBtn) {
             submitBtn.disabled = false
             submitBtn.textContent = '注册'
           }
-        }
-      })
-      .catch(() => {
-        showToast('网络错误', 'error')
-        if (submitBtn) {
-          submitBtn.disabled = false
-          submitBtn.textContent = '注册'
-        }
-      })
+        })
+    }
+
+    if (captchaState && captchaState.scenes && captchaState.scenes.register) {
+      captchaState.scenes.register.verify(doRegister)
+    } else {
+      doRegister()
+    }
   }
 
   function handlePhoneLogin(form) {
diff --git a/inc/classes/class-aksrt-moderation.php b/inc/classes/class-aksrt-moderation.php
index e1c4d880..4a274a0e 100644
--- a/inc/classes/class-aksrt-moderation.php
+++ b/inc/classes/class-aksrt-moderation.php
@@ -81,6 +81,24 @@ class AKSRT_Moderation {
      * Main moderation entry.
      */
     public function process(array $commentdata): array {
+
+        // 人机验证：覆盖 REST 与原生 wp-comments-post 两条提交合同（与审核开关无关）
+        if (function_exists('aksrt_require_captcha')) {
+            $payload = is_array($_POST ?? null) ? wp_unslash($_POST) : [];
+            if (isset($payload['captcha']) && is_array($payload['captcha'])) {
+                $payload = array_merge($payload, $payload['captcha']);
+            }
+            $captcha_result = aksrt_require_captcha('comment', $payload);
+            if ($captcha_result !== true) {
+                $msg = is_string($captcha_result) ? $captcha_result : __('人机验证失败', 'aksrt');
+                wp_die(
+                    esc_html($msg),
+                    esc_html__('评论提交失败', 'aksrt'),
+                    ['response' => 400, 'back_link' => true]
+                );
+            }
+        }
+
         $config = $this->get_config();
 
         if (empty($config['enabled'])) {
diff --git a/inc/core-hooks/part-3.php b/inc/core-hooks/part-3.php
index a1ddf8b4..a8105eb9 100644
--- a/inc/core-hooks/part-3.php
+++ b/inc/core-hooks/part-3.php
@@ -92,12 +92,9 @@ add_action('pre_get_posts', function ($query) {
 // ============================================================
 // 评论提交：单一合同
 // ------------------------------------------------------------
-// 评论提交统一走 WordPress 原生 wp-comments-post.php，由前端
-// main.js initCommentSystem() 以 AJAX 拦截：它负责人机验证、频率
-// 限制、审核管线，并在成功后通过 reloadCommentList() 重新拉取，
-// 列表仍由 aksrt_comment_callback 这一规范渲染器输出。
-// 不再保留并行的 aksrt_submit_comment 动作（避免绕过验证码的第二套提交合同）。
-// 详见 comment-contract.md。
+// 主路径：前端 comments.js → REST /comment/submit（aksrt_require_captcha）。
+// 兜底 / 原生 wp-comments-post.php 经 preprocess_comment 做人机验证，避免绕过。
+// 列表仍由 aksrt_comment_callback 统一渲染。
 // ============================================================
 
 // ============================================================