diff --git a/assets/css/kratos.css b/assets/css/kratos.css
index 9b54f6a..10a0918 100644
--- a/assets/css/kratos.css
+++ b/assets/css/kratos.css
@@ -2250,6 +2250,15 @@ button:focus {
   display: flex;
   align-items: center;
   justify-content: space-between;
+  /* 🔴 flex-wrap 是 3.2.56 支撑"任意层级"的关键：
+   *
+   *    有子级的 li 里除了 <a> + <span>，还多一个直接子元素
+   *    `<ul class="yang-cats-children">`。默认 nowrap 时它会挤进同一行，
+   *    把名字和数字挤扁；
+   *    这里允许换行，再让子级 ul `flex: 0 0 100%` 独占整行
+   *    ⇒ 子级自然落到父级名字下面，且**父级 li 的 padding-left
+   *      就成了下一层的缩进基准**（嵌套在内容盒里，缩进逐层累加）。 */
+  flex-wrap: wrap;
   margin-bottom: 0;
   padding: 0;
   list-style: none;
@@ -2305,34 +2314,73 @@ button:focus {
   color: #00a2ff;
 }
 
-/* ── 子分类（可选，默认关）──────────────────────────────────────────────
+/* ── 子分类：任意层级（3.2.56 从"只有两层"改成"有几层列几层"）──────────
  *
- * 缩进 + 字号轻一档。不加竖线：3.2.54 加过，但那是"常显树"的视觉语言；
- * 在浮层面板里加竖线会让本就不宽的面板更挤，缩进已经足够表达层级。 */
+ * 🔴 结构（每层都一样，嵌套在父级 li 内部）：
+ *
+ *     <ul class="yang-cats-list">
+ *       <li class="yang-cats-item">
+ *         <a/><span/>
+ *         <ul class="yang-cats-children">
+ *           <li class="yang-cats-item"> <a/><span/> … </li>
+ *         </ul>
+ *       </li>
+ *     </ul>
+ *
+ * 🔴 缩进与对齐是怎么同时成立的（这里的算式必须写清楚，改坏很难查）：
+ *
+ *     · 子级 ul 是 li 的 flex 子项，`flex: 0 0 100%` ⇒ 独占一行。
+ *     · 因嵌套在 li 的**内容盒**里，所有层共用一个右边界；
+ *     · 每层 li 只给 **padding-left**（缩进），**padding-right 一律 0**，
+ *       右侧内边距由最外层的 `.yang-cats-list > .yang-cats-item` 统一给 12px。
+ *
+ *     ⇒ 任意深度的数字右沿都在同一竖线上（数字要竖着比大小）。
+ *       3.2.55 就是子级又写了一遍 padding-right，叠成 24px、父子错开 12px。
+ *
+ * 🔴 缩进量取 12px/层：面板 250px 宽，减去右侧 12px、数字胶囊约 34px、
+ *    名字与数字间 8px，留给名字约 196px。三级时名字还剩 172px，
+ *    中文 15px 字号约能放 11 个字 —— 够用。到四五级会明显挤，
+ *    所以 CSS 里对超深层的缩进做了收敛（见下面的 `--cat-d` 规则）。
+ *
+ * 🔴🔴 缩进只能由一个地方给，不能 ul 和 li 各给一次（3.2.56 实测踩过）：
+ *    第一版 `.yang-cats-children { padding-left: 12px }` 加
+ *    `.yang-cats-children > .yang-cats-item { padding-left: 12px }`
+ *    ⇒ 每层实际缩进 **24px**，几何实测 stepPx=[24,24,18]，
+ *      第 3 层名字就只剩 148px，比设计预期少一半。
+ *    收敛规则也一起失效（12+6=18，看着像没收敛）。
+ *    ⇒ **子级 ul 的 padding-left 归零，缩进全部由子级 li 的 padding-left 给。**
+ *      这样一个数字管一件事，收敛规则也能精确生效。 */
 .w-cats .yang-cats-children {
-  /* 子级整段缩进 12px，与父级名字错开一档 */
-  padding: 0 0 6px 12px;
+  /* 独占一整行：父级名字在上，子级列表在下 */
+  flex: 0 0 100%;
+  width: 100%;
+  margin: 0;
+  /* 🔴 padding-left 必须 0：缩进由子级 li 独立给，两处都加会翻倍 */
+  padding: 0;
   background-color: #fcfcfc;
 }
 
-/* 🔴 子级 li 的**右侧**内边距必须是 0，不能跟着父级写 12px。
- *
- *    这是 3.2.55 几何实测抓出来的真缺陷（不是量法问题）：
- *
- *        父级数字右边界距面板内沿  12px
- *        子级数字右边界距面板内沿  24px   ← 多出整整 12px
- *
- *    原因：子级 `<ul>` 嵌在父级 `<li>` 里，而父级 li 已经有
- *    `padding: 0 12px`，那 12px 已经把子级 ul 的右边界推进去了；
- *    子级 li 再写一次 12px ⇒ 叠加成 24px。
- *
- *    后果很直观：**数字排不成一列**。面板里父级数字靠右、
- *    子级数字齐刷刷往左缩 12px，看着像两家不同的列表拼在一起。
- *    分类数字是要竖着比的（哪个分类文章多），错开一列就没法比。
- *
- *    ⇒ 子级只留左缩进（由 ul 的 padding-left 提供），右侧归零。 */
+/* 每层子级 li：只留左缩进，右侧归零（右侧由最外层统一给 12px） */
 .w-cats .yang-cats-children > .yang-cats-item {
-  padding: 0;
+  padding: 0 0 0 12px;
+}
+
+/* 🔴 第 4 层起缩进收敛：再往下每层只加 6px。
+ *
+ *    理由：面板宽度固定，缩进按 12px 线性累加的话，
+ *    第 5 层只剩 130px 出头，中文名字挤成两三个字一行，反而更难读。
+ *    分层收敛让深层"还能看出层级"但不至于把空间吃光。
+ *
+ *    用 `--cat-d`（渲染时写的真实深度）选层级，而不是靠选择器数嵌套层数 ——
+ *    后者写死了就只能支持固定层数，又回到 3.2.55 的老问题。 */
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:3"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:4"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:5"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:6"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:7"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:8"],
+.w-cats .yang-cats-children > .yang-cats-item[style*="--cat-d:9"] {
+  padding-left: 6px;
 }
 
 .w-cats .yang-cats-children > .yang-cats-item > .yang-cats-link {
@@ -2345,6 +2393,11 @@ button:focus {
   word-wrap: break-word;
 }
 
+/* 更深层再浅一档颜色：三级往下继续淡化，层级更明确（不影响可读性） */
+.w-cats .yang-cats-children .yang-cats-children > .yang-cats-item > .yang-cats-link {
+  color: #8f8f8f;
+}
+
 .w-cats .yang-cats-children > .yang-cats-item > .yang-cats-link:hover {
   color: #00a2ff;
 }
diff --git a/assets/css/kratos.min.css b/assets/css/kratos.min.css
index 43d0f1a..8467969 100644
--- a/assets/css/kratos.min.css
+++ b/assets/css/kratos.min.css
@@ -1 +1 @@
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li:hover{background-color:#eee}.nav-tabs .nav-item.show .nav-link,.nav-tabs .nav-link.active{border-bottom:2px solid #00a2ff;background-color:#fff;color:#333}.nav-tabs .nav-item{color:#333}.nav-tabs .nav-link{padding:8px 28px;border:0;border-bottom:2px solid #f2f2f2}.nav-tabs{border-bottom:none}.k-main .sidebar .widget_links ul{margin-bottom:0;padding-left:0}.k-main .sidebar .widget_links ul li a{color:#333}.k-main .sidebar #wp-calendar{width:100%}.k-main .sidebar caption,.k-main .sidebar tfoot{display:none}.k-main .sidebar tbody tr{font-weight:400;font-size:14px;font-family:arial}.k-main .sidebar tbody a{display:block;border:1px solid #00a2ff;background:#edf8ff}.k-main .sidebar tbody tr td,.k-main .sidebar thead tr th{text-align:center;cursor:default}.k-main .sidebar .widget_search .screen-reader-text{display:none}.btn-search{background-color:#00a2ff;border-color:#00a2ff}.btn-search:focus,.btn-search:hover,.btn-search:not(:disabled):not(.disabled):active{background-color:#0095ff;border-color:#0095ff}.btn-search:not(:disabled):not(.disabled):active:focus{box-shadow:none}.k-main .sidebar .widget_archive ul{margin:0;padding-left:0}.k-main .sidebar .widget_archive ul li{display:inline-block;overflow:hidden;margin:0 1px 4px 0;padding:4px 0;width:164px;border:1px solid #eee;list-style:none;text-align:center;text-overflow:ellipsis;font-size:14px;-webkit-transition:.3s;-o-transition:.3s;transition:.3s;-webkit-box-orient:vertical;-webkit-line-clamp:1}.k-main .sidebar .widget_archive ul li a{color:#333}.k-main .sidebar .w-search .btn,.k-main .sidebar .w-search .form-control{font-size:15px;border-radius:0}.k-main .sidebar .w-search .btn{padding-left:25px;padding-right:25px}@media screen and (max-width:1310px){.nav-tabs .nav-link{padding:8px 22px}.k-main .sidebar .widget_archive ul li{width:110px}}@media (min-width:992px){.navbar-expand-lg .navbar-nav .nav-link{padding-right:0;padding-left:32px}}.k-main .page404{padding:40px;text-align:center}.k-main .page404 .overlay{position:absolute;top:-1px;right:0;bottom:0;left:0;z-index:2;width:100%;height:101%;background:url(../img/404.svg) center center/cover no-repeat}.k-main .page404 .overlay:after,.k-main .page404 .overlay:before{position:absolute;top:0;z-index:10;width:20px;height:100%;background:#fff;content:""}.k-main .page404 .overlay:before{left:0}.k-main .page404 .overlay:after{right:0}.k-main .page404 .thumbnail{position:relative;width:100%;height:500px;background-position:center center;background-size:cover;background-repeat:no-repeat}.k-main .page404 .content{font-weight:500}.k-main .page404 .content .title{font-size:30px}.k-main .page404 .content .action,.k-main .page404 .content .subtitle{font-size:16px}.k-main .page404 .content .action .btn-outline-primary{width:110px;border-radius:2px;letter-spacing:2.4px}.k-main .page404 .content .action .back-prevpage{border-color:#00a2ff;background-color:#00a2ff;color:#fff}.k-main .page404 .content .action .back-prevpage:hover{border-color:#009ef9;background-color:#009ef9}.k-main .page404 .content .action .back-index{border-color:#d8dcdf;background-color:transparent;background-image:none;color:#666}.k-main .page404 .content .action .back-index:hover,.k-main .page404 .content .action .back-index:not(:disabled):not(.disabled):active{border-color:#d8dcdf;background-color:#f6f4f4;color:#666}@media screen and (max-width:768px){.k-main .page404 .thumbnail{height:315px}.k-main .page404 .content .title{font-size:21px}.k-main .page404 .content .subtitle{font-size:14px}}@media screen and (max-width:480px){.k-main .page404 .thumbnail{height:200px}}.k-footer{padding:40px 0;background:#23282d}.k-footer p{margin-bottom:0;color:#8e8e8e;text-transform:uppercase;letter-spacing:1px;font-size:14px;cursor:default}.k-footer p a{color:#8e8e8e}.k-footer p a:hover{color:#0097ee}.k-footer p .police-ico{display:inline-block;margin-top:-4px;margin-right:6px;width:14px;height:1pc;background:url(../img/police-ico.png) no-repeat;vertical-align:middle}.k-footer .f-toolbox>div{position:fixed;right:20px;z-index:999;text-align:center}.k-footer .f-toolbox .gotop .gotop-btn span,.k-footer .f-toolbox .search span{display:table-cell;width:40px;height:40px;color:#fff;vertical-align:middle;font-size:18px}.k-footer .f-toolbox .gotop{bottom:80px;visibility:hidden;cursor:pointer}.k-footer .f-toolbox .gotop .gotop-btn{display:table;width:40px;height:40px;color:#fff;text-align:center}.k-footer .f-toolbox .gotop.active{visibility:visible;background:rgba(132,132,132,.7)}.k-footer .f-toolbox .search{bottom:30px;display:table;background:rgba(132,132,132,.7);cursor:pointer}.k-footer .f-toolbox .search input{width:100%;height:40px;border:0;background:0 0;color:#fff;font-size:17px}.k-footer .social{line-height:45px}.k-footer .social a{display:inline-block;padding:0 7px}.k-footer .social a .kicon{font-size:40px}@media screen and (max-width:768px){.k-footer{padding:30px 0}.k-footer p{font-size:10px}.k-footer .social a .kicon{font-size:38px}}
\ No newline at end of file
diff --git a/inc/theme-widgets.php b/inc/theme-widgets.php
index ce6e652..7d1ea59 100644
--- a/inc/theme-widgets.php
+++ b/inc/theme-widgets.php
@@ -1284,8 +1284,8 @@ class widget_categories extends WP_Widget
         }
 
         /* get_categories 返回的是平铺数组（按 orderby 排好），
-         * 这里按 parent 归拢成树。不用 Walker，因为要输出 <details>，
-         * 而 Walker_Category 只认 <ul>/<li>。 */
+         * 这里按 parent 归拢成树。不用 Walker，因为要输出 <details> 面板，
+         * 而 Walker_Category 只认 <ul>/<li> 的固定形态。 */
         $by_parent = array();
         foreach ($cats as $c) {
             $pid = (int) $c->parent;
@@ -1295,25 +1295,55 @@ class widget_categories extends WP_Widget
             $by_parent[$pid][] = $c;
         }
 
-        // 只保留「根（parent=0）→ 直接子级」两层。实测本站最深就是 2 层；
-        // 若将来有第三层，递归会把 <details> 套娃，侧栏观感反而更差。
-        $tree = array();
         if (!isset($by_parent[0])) {
-            return $tree;
+            return array();
         }
 
-        foreach ($by_parent[0] as $root) {
-            $rid = (int) $root->term_id;
-            $children = isset($by_parent[$rid]) ? $by_parent[$rid] : array();
-            $tree[] = array(
-                'cat'      => $root,
-                'children' => $children,
-            );
-        }
+        /* 🔴 3.2.56 起改成**任意深度**递归（3.2.55 是写死两层）。
+         *
+         *    用户的诉求是「把多级目录也放进去，注意缩进」。本站实测最深
+         *    就 2 层（8 个一级 + 21 个二级，没有第三级），但"写死两层"
+         *    的代码在将来有人加第三级时会**静默丢掉**那一层 —— 页面上
+         *    看不出错，只是分类凭空少了。这种"少显示了但没人报错"的
+         *    缺陷最难发现，所以这里一次做成递归。
+         *
+         *    🔴 递归必须带**已访问集合 + 深度保护**：
+         *        · 数据库里 parent 指针理论上可以成环（手工改库、导入坏数据
+         *          都能造出来）。没有已访问集合的话，成环 ⇒ 无限递归 ⇒
+         *          PHP 直接栈溢出白屏。侧栏挂件白屏会把整站都带下去。
+         *        · 深度上限兜住其他意外（正常最多几级）。
+         *      两重保护都只用"跳过"处理，**不抛异常** —— 分类导航是
+         *      基础功能，宁可少显示一条也不能整站白屏。 */
+        $max_depth = 10;
 
-        /* 按文章数排序：在 PHP 里按「补过的 count」排，两边都排。
+        $build = function ($parent_id, $depth, $seen) use (&$build, $by_parent, $max_depth) {
+            if ($depth > $max_depth || !isset($by_parent[$parent_id])) {
+                return array();
+            }
+            $out = array();
+            foreach ($by_parent[$parent_id] as $c) {
+                $cid = (int) $c->term_id;
+                // 成环或重复：跳过，不进入下一层
+                if (isset($seen[$cid])) {
+                    continue;
+                }
+                $seen[$cid] = true;
+                $out[] = array(
+                    'cat'      => $c,
+                    'children' => $build($cid, $depth + 1, $seen),
+                );
+            }
+            return $out;
+        };
+
+        $tree = $build(0, 0, array());
+
+        /* 按文章数排序：在 PHP 里按「补过的 count」排，**每一层都排**。
          * 用 usort + 显式 tie-break（count 相同时按名称），
-         * 否则相等项的先后顺序取决于 usort 的实现，每次请求可能不同。 */
+         * 否则相等项的先后顺序取决于 usort 的实现，每次请求可能不同。
+         *
+         * 🔴 这里必须递归到所有层 —— 3.2.55 只排了前两层，第三层往后
+         *    永远保持 get_categories 给的顺序，与「按文章数排」不一致。 */
         if ($orderby === 'count') {
             $desc = ($order === 'DESC');
 
@@ -1327,33 +1357,148 @@ class widget_categories extends WP_Widget
                 return strnatcasecmp($a->name, $b->name);
             };
 
-            usort($tree, function ($x, $y) use ($cmp) {
-                return $cmp($x['cat'], $y['cat']);
-            });
-
-            foreach ($tree as $i => $node) {
-                if (count($node['children']) > 1) {
-                    usort($tree[$i]['children'], $cmp);
+            $sort_level = function (&$nodes) use (&$sort_level, $cmp) {
+                usort($nodes, function ($x, $y) use ($cmp) {
+                    return $cmp($x['cat'], $y['cat']);
+                });
+                foreach ($nodes as $i => $n) {
+                    if (!empty($n['children'])) {
+                        $sort_level($nodes[$i]['children']);
+                    }
                 }
-            }
+            };
+
+            $sort_level($tree);
         }
 
         return $tree;
     }
 
+    /**
+     * 在树里按 term_id 找分类名（任意深度）。
+     *
+     * 🔴 单独抽出来，是为了让「触发条文案」和「面板渲染」用**同一套**
+     *    遍历逻辑。3.2.55 那版是两段各自硬编码两层的循环 —— 一旦树的
+     *    层数变了，两处必须同时改，漏一处就会「面板里有、触发条上找不到」。
+     *
+     * 找不到返回空串（调用方据此显示占位文案「选择分类」）。
+     *
+     * @param array $tree  get_tree() 的返回值
+     * @param int   $cat_id
+     * @return string
+     */
+    private function find_name(array $tree, $cat_id)
+    {
+        foreach ($tree as $node) {
+            if ((int) $node['cat']->term_id === (int) $cat_id) {
+                return (string) $node['cat']->name;
+            }
+            if (!empty($node['children'])) {
+                $got = $this->find_name($node['children'], $cat_id);
+                if ($got !== '') {
+                    return $got;
+                }
+            }
+        }
+        return '';
+    }
+
+    /**
+     * 递归渲染一层分类（任意深度）。
+     *
+     * 每层的 DOM 完全一样：
+     *
+     *     <li class="yang-cats-item" style="--cat-d: N">
+     *         <a class="yang-cats-link">名字</a>
+     *         <span class="yang-cats-count">N</span>
+     *         <ul class="yang-cats-children"> …下一层… </ul>
+     *     </li>
+     *
+     * 🔴 下一层的 `<ul>` 必须放在**本层 li 里面**，不能放在 li 外面当兄弟：
+     *    HTML 里 `<ul>` 的直接子元素只能是 `<li>`，写成
+     *    `<ul><li/><ul/><li/></ul>` 是非法结构，浏览器容错行为不可依赖。
+     *
+     * 🔴 缩进靠**逐层累加的左内边距**：
+     *        li 是 `display:flex; flex-wrap:wrap`
+     *        下一层 ul 用 `flex: 0 0 100%` 独占一行（不进 flex 主轴）
+     *        ⇒ 嵌套 ul 落在父级 li 的**内容盒**内，天然右边界一致
+     *        ⇒ 所以每层 li 的 padding-left 相加就是缩进，且**数字右沿
+     *          始终对齐到面板右侧同一列**（数字要竖着比大小，不能错开）
+     *
+     *    3.2.55 只做两层，靠 `<ul padding-left>` 做缩进，导致子级数字比
+     *    父级多缩进 12px（那次修的是把子级 li 的 padding-right 归零）。
+     *    改成"逐层 li padding-left、padding-right 只在顶层给"之后，
+     *    这个对齐关系对**任意层数**都成立。
+     *
+     * @param array $nodes      本层节点
+     * @param int   $current_id 当前分类页的 term_id（0 = 不在分类页）
+     * @param array $ancestors  当前分类的祖先 id 链
+     * @param bool  $show_count 是否显示文章数
+     * @param int   $depth      当前层深度（0 = 顶级）
+     */
+    private function render_level(array $nodes, $current_id, array $ancestors, $show_count, $depth = 0)
+    {
+        if (count($nodes) === 0) {
+            return;
+        }
+
+        echo $depth === 0
+            ? '<ul class="yang-cats-list">'
+            : '<ul class="yang-cats-children">';
+
+        foreach ($nodes as $node) {
+            $cat  = $node['cat'];
+            $cid  = (int) $cat->term_id;
+            $kids = isset($node['children']) ? $node['children'] : array();
+
+            $cls = 'yang-cats-item';
+            if ($current_id === $cid) {
+                $cls .= ' current-cat';
+            } elseif (in_array($cid, $ancestors, true)) {
+                /* 当前在看这个父级底下的子分类 —— 父级挂 current-cat-parent，
+                 * 与核心 Walker_Category 的类名保持一致，便于写样式。
+                 * 这条要**对每一层都生效**（3.2.55 只对第一层生效）。 */
+                $cls .= ' current-cat-parent';
+            }
+            if (count($kids) > 0) {
+                $cls .= ' has-children';
+            }
+
+            echo '<li class="' . esc_attr($cls) . '" style="--cat-d:' . $depth . '">';
+            echo '<a class="yang-cats-link" href="' . esc_url(get_category_link($cid)) . '">'
+                . $this->name_html($cat->name) . '</a>';
+            if ($show_count) {
+                echo '<span class="yang-cats-count">' . (int) $cat->count . '</span>';
+            }
+
+            /* 下一层直接接在 li 内部（合法结构），由 CSS 的 flex-wrap 让它独占一行 */
+            if (count($kids) > 0) {
+                $this->render_level($kids, $current_id, $ancestors, $show_count, $depth + 1);
+            }
+
+            echo '</li>';
+        }
+
+        echo '</ul>';
+    }
+
     public function widget($args, $instance)
     {
         $show_count  = $this->pick($instance, 'count', true);
         $hide_empty  = $this->pick($instance, 'hide_empty', true);
-        /* 🔴 children 默认值 3.2.55 改成 **false**（3.2.54 是 true）。
+        /* 🔴 children 默认值 3.2.56 改回 **true**（3.2.55 是 false）。
          *
-         *    用户的诉求原话是「点击后把所有**一级**分类拉出来」—— 默认就该
-         *    只有一级。线上那个实例 `categories-3` 是核心老配置，压根没有
-         *    children 这个键 ⇒ 走 fallback ⇒ 改默认值就等于改线上呈现，
-         *    不需要用户去后台勾一下，也不用动数据库。
+         *    3.2.55 时用户的诉求是「点击后把所有**一级**分类拉出来」，
+         *    所以默认只列一级。2026-10-27 追加要求：「把多级目录也放进去，
+         *    现在只显示第一级，把其他的也放进去，注意缩进」⇒ 默认改成
+         *    列出**所有层级**（递归渲染，缩进表达层级）。
          *
-         *    想连子级一起看的人，在后台勾上即可（update() 会存成 1）。 */
-        $show_children = $this->pick($instance, 'children', false);
+         *    线上那个实例 `categories-3` 是核心老配置，压根没有 children
+         *    这个键 ⇒ 走 fallback ⇒ **改兜底值就等于改线上呈现**，用户
+         *    不用进后台勾一下，也不用动数据库。这是本挂件最省事的杠杆。
+         *
+         *    仍然保留开关：侧栏分类特别多时，可以在后台关掉只留一级。 */
+        $show_children = $this->pick($instance, 'children', true);
         $orderby     = $this->pick($instance, 'orderby', 'name');
         $order       = $this->pick($instance, 'order', 'ASC');
 
@@ -1410,18 +1555,7 @@ class widget_categories extends WP_Widget
          *    所以不必再往祖先链上找。 */
         $current_name = '';
         if ($current_id > 0) {
-            foreach ($tree as $node) {
-                if ((int) $node['cat']->term_id === $current_id) {
-                    $current_name = (string) $node['cat']->name;
-                    break;
-                }
-                foreach ($node['children'] as $kid) {
-                    if ((int) $kid->term_id === $current_id) {
-                        $current_name = (string) $kid->name;
-                        break 2;
-                    }
-                }
-            }
+            $current_name = $this->find_name($tree, $current_id);
         }
 
         /* 面板 DOM id：一页上可能有多个实例（虽然实际很少），必须唯一，
@@ -1450,63 +1584,42 @@ class widget_categories extends WP_Widget
         echo '</summary>';
 
         echo '<div class="yang-cats-panel" id="' . esc_attr($panel_id) . '">';
-        echo '<ul class="yang-cats-list">';
 
-        foreach ($tree as $node) {
-            $root  = $node['cat'];
-            $rid   = (int) $root->term_id;
-            $kids  = $node['children'];
-            $has_kids = ($show_children && count($kids) > 0);
-
-            $root_cls = 'yang-cats-item';
-            if ($has_kids) {
-                $root_cls .= ' has-children';
+        /* 🔴 3.2.56：子分类从「两层平铺」改成**递归渲染所有层级**。
+         *
+         *    用户 2026-10-27 的要求：「把多级目录也放进去，现在只显示第一级，
+         *    把其他的也放进去，注意缩进」。
+         *
+         *    ⇒ 面板里现在一次列全：一级 → 二级 → 三级（有几层列几层），
+         *      点开一次就能看到全部，不用逐层点。
+         *
+         *    🔴 缩进**不是**靠 `--cat-d` 变量算的（那样每层都要写一条
+         *       偏移量规则，层数一变就得改 CSS）。缩进靠**嵌套 + 逐层
+         *       padding-left** 自然累加：`.yang-cats-children` 用
+         *       `flex: 0 0 100%` 独占一行、嵌在父级 li 的内容盒里，
+         *       所以每层 li 的 padding-left 相加就是缩进，右边界还一致。
+         *       `--cat-d` 只用来做两件事：① 标记真实深度供第 4 层起
+         *       缩进收敛（`[style*="--cat-d:3"]` 起）；② 给测试读。
+         *       **它不参与算缩进**，写错了也不会导致布局错位。
+         *
+         *    🔴 仍然保留 `children` 开关（默认已改回 **true**）：
+         *       有人侧栏分类多，全列出来面板太长要滚很久，这时可以关掉
+         *       只留一级。关掉时不是"少一层"，而是**只列一级**。
+         *
+         *    🔴 关掉时的实现不是另写一份循环，而是把每个节点的 children
+         *       清空后交给同一个渲染函数 —— 两份循环必然会漂移（3.2.55
+         *       就是两段各自硬编码两层），一处改了另一处忘改就出怪现象。 */
+        if ($show_children) {
+            $this->render_level($tree, $current_id, $current_ancestors, $show_count);
+        } else {
+            $roots = array();
+            foreach ($tree as $node) {
+                $node['children'] = array();
+                $roots[] = $node;
             }
-            if ($current_id === $rid) {
-                $root_cls .= ' current-cat';
-            } elseif (in_array($rid, $current_ancestors, true)) {
-                /* 当前在看这个父级底下的子分类 —— 父级挂 current-cat-parent，
-                 * 与核心 Walker_Category 的类名保持一致，便于写样式。 */
-                $root_cls .= ' current-cat-parent';
-            }
-
-            echo '<li class="' . esc_attr($root_cls) . '">';
-            echo '<a class="yang-cats-link" href="' . esc_url(get_category_link($rid)) . '">'
-                . $this->name_html($root->name) . '</a>';
-            if ($show_count) {
-                echo '<span class="yang-cats-count">' . (int) $root->count . '</span>';
-            }
-
-            /* 子分类：只有用户显式勾了「显示子分类」才输出。
-             *
-             * 🔴 这里**不再用 <details> 嵌套**（3.2.54 是那样）。原因：
-             *    面板本身就是浮层，展开状态只由触发条一个开关管；
-             *    再套一层折叠，用户点开面板后仍要再点一次才能看见子级，
-             *    「点击后把所有的一级分类拉出来」这个诉求就没满足。
-             *    子级直接平铺在父级下面、缩进显示 —— 一目了然，少一次点击。 */
-            if ($has_kids) {
-                echo '<ul class="yang-cats-children">';
-                foreach ($kids as $kid) {
-                    $kid_id = (int) $kid->term_id;
-                    $kid_cls = 'yang-cats-item';
-                    if ($current_id === $kid_id) {
-                        $kid_cls .= ' current-cat';
-                    }
-                    echo '<li class="' . esc_attr($kid_cls) . '">';
-                    echo '<a class="yang-cats-link" href="' . esc_url(get_category_link($kid_id)) . '">'
-                        . $this->name_html($kid->name) . '</a>';
-                    if ($show_count) {
-                        echo '<span class="yang-cats-count">' . (int) $kid->count . '</span>';
-                    }
-                    echo '</li>';
-                }
-                echo '</ul>';
-            }
-
-            echo '</li>';
+            $this->render_level($roots, $current_id, $current_ancestors, $show_count);
         }
 
-        echo '</ul>';
         echo '</div>';
         echo '</details>';
         echo '</div>';
@@ -1594,7 +1707,7 @@ class widget_categories extends WP_Widget
         $show_count   = $this->pick($instance, 'count', true);
         $hide_empty   = $this->pick($instance, 'hide_empty', true);
         // 与 widget() 保持同一默认值（理由见 widget() 里的注释）
-        $show_children = $this->pick($instance, 'children', false);
+        $show_children = $this->pick($instance, 'children', true);
         $orderby      = $this->pick($instance, 'orderby', 'name');
         $order        = $this->pick($instance, 'order', 'ASC');
         if ($orderby !== 'count') {
@@ -1613,8 +1726,8 @@ class widget_categories extends WP_Widget
 
             <p>
                 <input class="checkbox" type="checkbox" id="<?php echo esc_attr($this->get_field_id('children')); ?>" name="<?php echo esc_attr($this->get_field_name('children')); ?>" <?php checked($show_children); ?>>
-                <label for="<?php echo esc_attr($this->get_field_id('children')); ?>"><?php _e('展开时同时列出子分类', 'kratos'); ?></label>
-                <span class="description"><?php _e('默认只列一级分类。勾上后，有子分类的父级下面会缩进列出它的子分类。', 'kratos'); ?></span>
+                <label for="<?php echo esc_attr($this->get_field_id('children')); ?>"><?php _e('列出子分类（含更多层级）', 'kratos'); ?></label>
+                <span class="description"><?php _e('默认列出全部层级，下级缩进显示。分类特别多、面板太长时，可以关掉只留一级分类。', 'kratos'); ?></span>
             </p>
 
             <p>
diff --git a/style.css b/style.css
index bd30d05..bc4dc46 100644
--- a/style.css
+++ b/style.css
@@ -1,7 +1,7 @@
 /*
 Theme Name: Kratos_Yang
 Text Domain: kratos_Yang
-Version: 3.2.55
+Version: 3.2.56
 Requires PHP: 7.0
 Description: 这是一个Kratos主题的分支版本，用来增加一些定制化功能。
 Tags: 博客, 双栏, 响应式, 自定义背景, 自定义颜色, 自定义图标, 自定义菜单, 特色图像, 收录优化, 邮件中心, 主题选项, 小工具, 文章置顶, 无障碍友好