diff --git a/assets/style.css b/assets/style.css
index b642414..86a823f 100644
--- a/assets/style.css
+++ b/assets/style.css
@@ -123,7 +123,7 @@ hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }
     font-weight: 680; font-size: 16px; color: var(--text); letter-spacing: -.01em;
 }
 .brand:hover { text-decoration: none; color: var(--text); }
-.brand-mark { font-size: 18px; line-height: 1; }
+.brand-mark { width: 20px; height: 20px; display: block; }
 .brand-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 
 /* 右侧一整组（新建 + 菜单）整体不许被压缩：窄屏宁可省略名字，也别把菜单挤没 */
diff --git a/install.php b/install.php
index 4c0d824..2556371 100644
--- a/install.php
+++ b/install.php
@@ -347,7 +347,8 @@ foreach ($checks as $c) {
          background:#f4f6fa; color:#243041; font-size:14px; }
   .wrap { max-width:640px; margin:0 auto; padding:36px 16px 60px; }
   .head { text-align:center; margin-bottom:26px; }
-  .head .logo { font-size:40px; }
+  .head .logo { font-size:0; }
+  .head .logo img { width:44px; height:44px; display:inline-block; }
   .head h1 { font-size:22px; margin:8px 0 4px; }
   .head p { color:#6b7686; margin:0; }
   .card { background:#fff; border-radius:14px; padding:24px 26px; margin-bottom:18px;
@@ -382,7 +383,7 @@ foreach ($checks as $c) {
 <body>
 <div class="wrap">
   <div class="head">
-    <div class="logo">🧭</div>
+    <div class="logo"><img src="assets/icons/trip-log.svg" alt="" width="44" height="44"></div>
     <h1>TripLog 安装向导</h1>
     <p>家庭旅行日记 · 首次部署配置</p>
   </div>
diff --git a/templates/layout.php b/templates/layout.php
index 4a4a6d1..1d51095 100644
--- a/templates/layout.php
+++ b/templates/layout.php
@@ -42,7 +42,7 @@ $__initial    = $__name !== '' ? mb_substr($__name, 0, 1) : '·';
 <?php if ($__isLoggedIn): ?>
 <header class="topbar">
     <a href="<?= url('activities/index') ?>" class="brand">
-        <span class="brand-mark">🧭</span>
+        <img class="brand-mark" src="<?= e(asset('assets/icons/trip-log.svg')) ?>" alt="" width="20" height="20">
         <span class="brand-text">家庭出行记录</span>
     </a>