diff --git a/comments.php b/comments.php
index de88c1a..93fe1c2 100644
--- a/comments.php
+++ b/comments.php
@@ -7,7 +7,6 @@ if (post_password_required()) return;
 
 <div id="comments" class="comments-section">
 
-
     <?php if (have_comments()) : ?>
     <h3 class="comment-reply-title">笺下留言</h3>
         <ol class="comment-list">
@@ -28,11 +27,7 @@ if (post_password_required()) return;
                     </div>
                     <div class="comment-item__text"><?php echo esc_html($c->comment_content); ?></div>
                     <div class="comment-item__reply">
-                        <?php if (is_user_logged_in()) : ?>
-                            <a href="<?php echo esc_url(add_query_arg('replytocom', $c->comment_ID, get_permalink() . '#respond')); ?>">回复</a>
-                        <?php else : ?>
-                            <a href="javascript:void(0)" onclick="goLogin()">回复</a>
-                        <?php endif; ?>
+                        <a href="javascript:void(0)" onclick="replyTo(<?php echo $c->comment_ID; ?>)">回复</a>
                     </div>
                 </li>
             <?php endforeach; ?>
@@ -40,40 +35,53 @@ if (post_password_required()) return;
     <?php endif; ?>
 
     <?php if (is_user_logged_in()) : ?>
-        <?php
-        comment_form(array(
+        <?php comment_form(array(
             'title_reply'          => '',
             'comment_notes_before' => '',
             'comment_notes_after'  => '',
             'logged_in_as'         => '',
             'fields'               => array(),
-            'comment_field'        => '<textarea id="comment" name="comment" rows="4" placeholder="写点什么..." required></textarea>',
+            'comment_field'        => '<textarea id="comment" name="comment" rows="3" placeholder="写点什么..." required></textarea>',
             'submit_button'        => '<button type="submit" class="submit">落笔留痕</button>',
             'submit_field'         => '<div class="form-submit">%1$s %2$s</div>',
             'label_submit'         => '落笔留痕',
-        ));
-        ?>
+        )); ?>
     <?php else : ?>
         <form id="commentform-guest" class="comment-form" novalidate>
-            <textarea id="comment" name="comment" rows="4" placeholder="写点什么..." required></textarea>
+            <textarea id="comment" name="comment" rows="3" placeholder="写点什么..." required></textarea>
+            <input type="hidden" id="comment_parent" name="comment_parent" value="0">
             <div class="form-submit">
                 <button type="submit" class="submit">落笔留痕</button>
             </div>
         </form>
-        <script>
-        document.getElementById('commentform-guest').addEventListener('submit', function(e) {
-            e.preventDefault();
-            var m = document.getElementById('login-modal');
-            if (m) m.classList.add('active');
-        });
-        function closeLoginModal() {
-            var m = document.getElementById('login-modal');
-            if (m) m.classList.remove('active');
-        }
-        function goLogin() {
-            window.location.href = '/wp-login.php?redirect_to=' + encodeURIComponent(window.location.href);
-        }
-        </script>
+    <?php endif; ?>
+
+    <?php if (!is_user_logged_in()) : ?>
+    <div id="login-modal" class="login-modal" style="display:none">
+        <div class="login-modal__content">
+            <p>登录后才能留言</p>
+            <button onclick="goLogin()" class="submit">去登录</button>
+            <button onclick="closeLoginModal()" class="cancel-btn">取消</button>
+        </div>
+    </div>
+    <script>
+    function replyTo(cid) {
+        document.getElementById('comment_parent').value = cid;
+        document.getElementById('comment').focus();
+    }
+    function goLogin() {
+        window.location.href = '/wp-login.php?redirect_to=' + encodeURIComponent(window.location.href);
+    }
+    function closeLoginModal() {
+        var m = document.getElementById('login-modal');
+        if (m) m.style.display = 'none';
+    }
+    document.getElementById('commentform-guest').addEventListener('submit', function(e) {
+        e.preventDefault();
+        var m = document.getElementById('login-modal');
+        if (m) m.style.display = 'flex';
+    });
+    </script>
     <?php endif; ?>
 
 </div>
diff --git a/style.css b/style.css
index 6673459..2822a87 100644
--- a/style.css
+++ b/style.css
@@ -1,6 +1,6 @@
 /*
 Theme Name: 空笺未寄
-Version: 0.16.4
+Version: 0.16.5
 Requires at least: 6.0
 Requires PHP: 7.4
 License: MIT
@@ -147,8 +147,14 @@ Text Domain: kj-weji
         
         .comment-form { margin-top:24px; display:flex; flex-direction:column; gap:12px; }
         .comment-form textarea { width:100%; padding:14px; border:1px solid var(--border); border-radius:var(--radius); background:var(--white); font-family:inherit; font-size:14px; color:var(--ink); resize:vertical; min-height:80px; }
+.comment-respond h3, #reply-title { font-size:14px !important; font-weight:600; margin-bottom:12px; }
         .comment-form button { align-self:flex-end; background:var(--cinnabar); color:#fff; border:none; padding:8px 24px; border-radius:20px; cursor:pointer; font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif; font-size:13px; transition:background 0.2s; }
         .comment-form button:hover { background:#a03a32; }
+        .cancel-btn { font-size:13px; color:var(--ink-lighter); background:none; border:1px solid var(--border); padding:8px 24px; border-radius:20px; cursor:pointer; }
+        .login-modal { display:none; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.4); z-index:300; align-items:center; justify-content:center; }
+        .login-modal__content { background:var(--white); padding:32px; border-radius:var(--radius-lg); text-align:center; box-shadow:0 4px 24px rgba(0,0,0,0.2); }
+        .login-modal__content p { margin-bottom:16px; font-size:15px; color:var(--ink); }
+        .login-modal__content button { margin:0 6px; }
 
         /* 吐槽 */
         .tucao-item { padding:15px 0; border-bottom:1px solid var(--border-light); }