diff --git a/resources/views/chat/partials/input-bar.blade.php b/resources/views/chat/partials/input-bar.blade.php
index 3f43a09..13f7481 100644
--- a/resources/views/chat/partials/input-bar.blade.php
+++ b/resources/views/chat/partials/input-bar.blade.php
@@ -42,6 +42,19 @@
                     style="width: 22px; height: 18px; padding: 0; border: 1px solid navy; cursor: pointer;">
             </label>
 
+            <label>字号:
+                <select id="font_size_select" style="color: #224466;" onchange="applyFontSize(this.value)">
+                    <option value="12">12</option>
+                    <option value="13">13</option>
+                    <option value="14" selected>14</option>
+                    <option value="15">15</option>
+                    <option value="16">16</option>
+                    <option value="18">18</option>
+                    <option value="20">20</option>
+                    <option value="22">22</option>
+                </select>
+            </label>
+
             <label title="仅对方和自己可见">
                 <input type="checkbox" id="is_secret" name="is_secret" value="1">
                 悄悄话
diff --git a/resources/views/chat/partials/scripts.blade.php b/resources/views/chat/partials/scripts.blade.php
index 24e716d..8f730ed 100644
--- a/resources/views/chat/partials/scripts.blade.php
+++ b/resources/views/chat/partials/scripts.blade.php
@@ -653,6 +653,40 @@
     }
     window.triggerEffect = triggerEffect;
 
+    // ── 字号设置（持久化到 localStorage）─────────────────
+    /**
+     * 应用字号到聊天消息窗口，并保存到 localStorage
+     *
+     * @param {string|number} size  字号大小（px 数字）
+     */
+    function applyFontSize(size) {
+        const px = parseInt(size, 10);
+        if (isNaN(px) || px < 10 || px > 30) return;
+
+        // 同时应用到公聊窗和包厢窗
+        const c1 = document.getElementById('chat-messages-container');
+        const c2 = document.getElementById('chat-messages-container2');
+        if (c1) c1.style.fontSize = px + 'px';
+        if (c2) c2.style.fontSize = px + 'px';
+
+        // 持久化（key 带房间 ID，不同房间各自记住）
+        const key = 'chat_font_size';
+        localStorage.setItem(key, px);
+
+        // 同步 select 显示
+        const sel = document.getElementById('font_size_select');
+        if (sel) sel.value = String(px);
+    }
+    window.applyFontSize = applyFontSize;
+
+    // 页面加载后从 localStorage 恢复之前保存的字号
+    document.addEventListener('DOMContentLoaded', () => {
+        const saved = localStorage.getItem('chat_font_size');
+        if (saved) {
+            applyFontSize(saved);
+        }
+    });
+
     // ── 发送消息（Enter 发送） ───────────────────────
     document.getElementById('content').addEventListener('keydown', function(e) {
         if (e.key === 'Enter' && !e.shiftKey) {