Ok

templates/404.html

@@ -0,0 +1,12 @@
+{% extends "base.html" %}
+
+{% block title %}找不到頁面{% endblock %}
+
+{% block content %}
+<div class="container text-center py-5">
+  <h1 class="display-1">404</h1>
+  <h2 class="mb-4">找不到頁面 (Not Found)</h2>
+  <p class="lead">抱歉，您要找的頁面不存在。</p>
+  <a href="{{ url_for('temp_spec.spec_list') }}" class="btn btn-primary mt-3">返回總表</a>
+</div>
+{% endblock %}