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admin/404.php

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+<!-- start page title -->
+<div class="row">
+	<div class="col-12">
+		<div class="page-title-box">
+			<div class="page-title-right">
+				<ol class="breadcrumb m-0">
+					<li class="breadcrumb-item"><a href="./">首页</a></li>
+					<li class="breadcrumb-item active">错误</li>
+				</ol>
+			</div>
+			<h4 class="page-title">404</h4>
+		</div> <!-- end page-title-box -->
+	</div> <!-- end col-->
+</div>
+<!-- end page title -->
+
+<div class="row">
+	<div class="col-sm-12">
+		<div class="text-center">
+
+			<div class="text-center" style="margin-top:6.5rem!important;margin-bottom:8rem!important;">
+				<img src="../assets/images/maintenance.svg" height="120" alt="File not found Image">
+				<h4 class="text-uppercase mt-3">你遇到了一个错误的页面</h4>
+				<p class="text-muted mt-3"> 由于你当前访问的页面不存在，因此无法显示。请返回首页重试</p>
+				<a class="btn btn-success btn-sm mt-2" href="./">返回首页</a>
+			</div>
+
+		</div>
+	</div><!-- end col -->
+</div><!-- end row -->