diff --git a/common/templates/partial/_navbar.html b/common/templates/partial/_navbar.html
index 180c6ca2..21db07e6 100644
--- a/common/templates/partial/_navbar.html
+++ b/common/templates/partial/_navbar.html
@@ -12,7 +12,7 @@
                 <div class="navbar__search-box">
                     <!-- <input type="search" class="" name="q" id="searchInput" required="true" value="{% for v in request.GET.values %}{{ v }}{% endfor %}" -->
                     <input type="search" class="" name="q" id="searchInput" required="true" value="{% if request.GET.q %}{{ request.GET.q }}{% endif %}"
-                        placeholder="搜索书影音游戏，或输入豆瓣/Goodreads/Steam/Spotify/Bandcamp/TMDB/IMDB/Bangumi等条目链接">
+                        placeholder="搜索书影音游戏，或输入站外条目链接如 https://movie.douban.com/subject/1297880/ 支持站点列表见页底公告栏">
                     <select class="navbar__search-dropdown" id="searchCategory">
                         <option value="all" {% if request.GET.c and request.GET.c == 'all' or not request.GET.c %}selected{% endif %}>{% trans '任意' %}</option>
                         <option value="book" {% if request.GET.c and request.GET.c == 'book' or '/books/' in request.path %}selected{% endif %}>{% trans '书籍' %}</option>
diff --git a/common/templatetags/neo.py b/common/templatetags/neo.py
index cb57e5e4..ea74fef7 100644
--- a/common/templatetags/neo.py
+++ b/common/templatetags/neo.py
@@ -6,4 +6,6 @@ register = template.Library()
 
 @register.simple_tag(takes_context=True)
 def current_user_marked_item(context, item):
-    return context['request'].user.get_mark_for_item(item)
+    if context['request'].user and context['request'].user.is_authenticated:
+        return context['request'].user.get_mark_for_item(item)
+    return None