fix margin space

Author: wxiaoguang

templates/status/404.tmpl

@@ -5,7 +5,7 @@
 		<div class="status-page-error">
 			<div class="status-page-error-title">404 Not Found</div>
 			<div class="tw-text-center">
-				<div>{{if .NotFoundPrompt}}{{.NotFoundPrompt}}{{else}}{{ctx.Locale.Tr "error404"}}{{end}}</div>
+				<div class="tw-my-4">{{if .NotFoundPrompt}}{{.NotFoundPrompt}}{{else}}{{ctx.Locale.Tr "error404"}}{{end}}</div>
 				{{if .NotFoundGoBackURL}}
 					<a class="tw-block tw-my-4" href="{{.NotFoundGoBackURL}}">{{ctx.Locale.Tr "go_back"}}</a>
 				{{end}}

web_src/css/base.css

@@ -483,7 +483,7 @@ img.ui.avatar,
 
 .status-page-error-title {
   font-size: 48px;
-  margin-bottom: 24px;
+  margin-bottom: 14px; /* some elements below may use tw-my-4 or tw-my-8, so use 14px as a minimal margin */
   line-height: initial;
   text-align: center;
   font-weight: var(--font-weight-bold);