75rem;
            line-height: 1.4;
            max-height: 400px;
            overflow-y: auto;
        }
    </style>
    
    {% block extra_css %}{% endblock %}
</head>
<body>
    <!-- 导航栏 -->
    <nav class="navbar navbar-expand-lg navbar-dark bg-primary">
        <div class="container">
            <a class="navbar-brand" href="{{ url_for('main.index') }}">
                <i class="fas fa-network-wired me-2"></i>
                交换机配置生成平台
            </a>
            <button 