顶栏上下留白按 1.1 倍标题高度，标题、导航与页面内容间距统一。

Co-authored-by: Cursor <cursoragent@cursor.com>

templates/base.html

@@ -4,7 +4,7 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>{% block title %}加密货币｜OKX 期权中控{% endblock %}</title>
-  <link rel="stylesheet" href="{{ url_for('static', filename='hub.css') }}?v=27">
+  <link rel="stylesheet" href="{{ url_for('static', filename='hub.css') }}?v=29">
 </head>
 <body class="{% if request.path.startswith('/login') %}page-login{% elif request.path.startswith('/desk') %}page-desk{% elif request.path.startswith('/stats') %}page-stats{% elif request.path.startswith('/instances') %}page-instances{% elif request.path == '/' %}page-dashboard{% endif %}">
   {% if session.get('logged_in') %}