/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
        }
        
        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        .header {
            background-color: #F5F5F5;
            color: #000;
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo a {
            color: #000;
            text-decoration: none;
            font-size: 20px;
            font-weight: bold;
        }
        
        .main-nav ul {
            display: flex;
            list-style: none;
        }
        
        .main-nav a {
            color: #000;
            text-decoration: none;
            padding: 5px 15px;
            transition: background-color 0.3s;
        }
        
        .main-nav a:hover {
            background-color: #F5F5F5;
        }
        
        /* 主要内容区 */
        .main-container {
            display: flex;
            min-height: calc(100vh - 120px);
        }
        
        /* 侧边栏样式 */
        .sidebar {
            width: 250px;
            background-color: #E3E3E3;
            color: #000;
            height: calc(100vh - 90px);
            position: sticky;
            top: 0;
            overflow-y: auto;
        }
        
        .sidebar-header {
            padding: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #F5F5F5;
        }
        
        .sidebar-menu {
            list-style: none;
        }
        
        .sidebar-menu li {
            border-bottom: 1px solid #F5F5F5;
        }
        
        .sidebar-menu a {
            color: #000;
            text-decoration: none;
            display: block;
            padding: 12px 15px;
            transition: background-color 0.3s;
        }
        
        .sidebar-menu a:hover {
            background-color: #F5F5F5;
        }
        
        .sidebar-menu .active a {
            background-color: #F5F5F5;
        }
        
        .submenu {
            list-style: none;
            display: none;
            background-color: #E3E3E3;
        }
        
        .submenuy {
            list-style: none;
            display: block;
            background-color: #E3E3E3;
        }
        
        .sidebar-menu li:hover .submenu {
            display: block;
        }
        
        .submenu li a {
            padding-left: 30px;
            font-size: 0.9em;
        }
        
        .submenuy li a {
            padding-left: 30px;
            font-size: 0.9em;
        }
       .vb{font-weight: bold;}
        
        /* 内容区域样式 */
        .content {
            flex: 1;
            padding: 20px;
            background-color: white;
            margin: 15px;
            border-radius: 5px;
            box-shadow: 0 0 5px rgba(0,0,0,0.1);
        }
        
        .document-title {
            margin-bottom: 15px;
            color: #2c3e50;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }
        
        .document-meta {
            color: #7f8c8d;
            font-size: 0.9em;
            margin-bottom: 20px;
        }
        
        .document-meta span {
            margin-right: 15px;
        }
        
        .document-body h2 {
            margin: 25px 0 15px;
            color: #2c3e50;
            border-bottom: 1px solid #eee;
            padding-bottom: 5px;
        }
        
        .document-body h3 {
            margin: 20px 0 10px;
            color: #34495e;
        }
        
        .document-body p {
            margin-bottom: 15px;
        }
        
        .document-body ul {
            margin-left: 30px;
            margin-bottom: 15px;
        }
        
        .document-body pre {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: 5px;
            overflow-x: auto;
            margin: 15px 0;
        }
        
        /* 页脚样式 */
        .footer {
            background-color: #E3E3E3;
            color: #000;
            text-align: center;
            padding: 20px 0;
            margin-top: 30px;
        }