/* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            /*padding: 20px;*/
        }
        
        .cplist-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        /* header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 2px solid #eaeaea;
        }
        
        h1 {
            color: #2c3e50;
            font-size: 2.2rem;
            margin-bottom: 10px;
        }
         */
        .subtitle {
            color: #7f8c8d;
            font-size: 1rem;
        }
        
        /* 菜单主要样式 */
        .menu-container {
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            margin-bottom: 40px;
        }
        
        .menu-title {
            background: linear-gradient(135deg, #1756c5, #2b7fff);
            color: white;
            padding: 20px 25px;
            font-size: 1.2rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .menu-title i {
            font-size: 1.3rem;
        }
        
        /* 一级菜单项 */
        .menu-item {
            border-bottom: 1px solid #f0f0f0;
            position: relative;
        }
        
        .menu-item:last-child {
            border-bottom: none;
        }
        
        .menu-item > a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 25px;
            color: #2c3e50;
            font-size: 1.1rem;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        
        .menu-item > a:hover {
            background-color: #f8fafc;
            color: #2980b9;
            padding-left: 30px;
        }
        
        .menu-item.active > a {
            color: #2980b9;
            background-color: #f0f7ff;
            font-weight: 600;
        }
        
        /* 菜单图标 */
        .menu-icon {
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
            color: #0d50eb;
            background: #e8f4fc;
            border-radius: 6px;
            font-size: 0.9rem;
        }
        
        /* 展开/收起箭头 */
        .arrow {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        
        .menu-item.active .arrow {
            transform: rotate(90deg);
            color: #3498db;
        }
        
        /* 二级菜单 */
        .submenu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            background-color: #f9fbfd;
        }
        
        .menu-item.active .submenu {
            max-height: 1000px; /* 增加高度以适应三级菜单 */
        }
        
        .submenu-item {
            position: relative;
        }
        
        .submenu-item > a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 25px 15px 60px;
            color: #4a5568;
            text-decoration: none;
            transition: all 0.2s ease;
            position: relative;
            cursor: pointer;
        }
        
        .submenu-item > a:hover {
            background-color: #edf2f7;
            color: #2980b9;
            padding-left: 65px;
        }
        
        .submenu-item.active > a {
            color: #2980b9;
            background-color: #e8f4fc;
            font-weight: 500;
        }
        
        .submenu-item > a:before {
            content: "";
            position: absolute;
            left: 45px;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 6px;
            background-color: #a0aec0;
            border-radius: 50%;
        }
        
        .submenu-item > a:hover:before,
        .submenu-item.active > a:before {
            background-color: #2980b9;
        }
        
        /* 二级菜单箭头 */
        .submenu-item .arrow {
            width: 20px;
            height: 20px;
            font-size: 0.8rem;
        }
        
        .submenu-item.active .arrow {
            transform: rotate(90deg);
            color: #3498db;
        }
        
        /* 三级菜单 */
        .third-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background-color: #f5f9ff;
        }
        
        .submenu-item.active .third-menu {
            max-height: 500px;
        }
        
        .third-item {
            border-top: 1px solid #e2e8f0;
        }
        
        .third-item a {
            display: block;
            padding: 12px 25px 12px 85px;
            color: #718096;
            text-decoration: none;
            transition: all 0.2s ease;
            position: relative;
        }
        
        .third-item a:hover {
            background-color: #e2e8f0;
            color: #2980b9;
            padding-left: 90px;
        }
        
        .third-item a:before {
            content: "›";
            position: absolute;
            left: 70px;
            top: 50%;
            transform: translateY(-50%);
            color: #a0aec0;
            font-size: 1rem;
        }
        
        .third-item a:hover:before {
            color: #2980b9;
        }
        
        /* 响应式设计 - 电脑端竖排 */
        /* 移除原有的分列布局，保持竖排 */
        @media (min-width: 768px) {
            .menu-container {
                /* 保持单列布局，不分列 */
                display: block;
            }
            
            .menu-title {
                width: 100%;
            }
        }
        
        @media (max-width: 767px) {
            h1 {
                font-size: 1.8rem;
            }
            
            .menu-title {
                padding: 18px 20px;
                font-size: 1.3rem;
            }
            
            .menu-item > a {
                padding: 16px 20px;
            }
            
            .menu-item > a:hover {
                padding-left: 25px;
            }
            
            .submenu-item > a {
                padding: 14px 20px 14px 50px;
            }
            
            .submenu-item > a:hover {
                padding-left: 55px;
            }
            
            .submenu-item > a:before {
                left: 35px;
            }
            
            .third-item a {
                padding: 12px 20px 12px 65px;
            }
            
            .third-item a:hover {
                padding-left: 70px;
            }
            
            .third-item a:before {
                left: 50px;
            }
        }
        
        /* 演示内容样式 */
        .content {
            background: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
            margin-top: 20px;
        }
        
        .content h2 {
            color: #2c3e50;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .content p {
            margin-bottom: 15px;
            color: #555;
        }
        
        .menu-structure {
            background-color: #f8fafc;
            border-left: 4px solid #3498db;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        
        .menu-structure h3 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .menu-structure ul {
            padding-left: 20px;
        }
        
        .menu-structure li {
            margin-bottom: 5px;
            color: #4a5568;
        }
        
        .footer-note {
            text-align: center;
            margin-top: 30px;
            color: #7f8c8d;
            font-size: 0.9rem;
        }
        
        /* 选中状态样式 */
        .selected {
            font-weight: 600;
            color: #2980b9 !important;
        }
        
        /* 当前页面指示器 */
        .current-page {
            position: absolute;
            right: 25px;
            background-color: #3498db;
            color: white;
            padding: 2px 8px;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 500;
        }