/* 添加移动端导航的CSS样式 */
        /* 移动端导航样式 */
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 9998;
            display: none;
        }

        .mobile-nav-overlay.active {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        .mobile-nav-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: white;
            z-index: 9999;
            overflow-y: auto;
            display: none;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
        }

        .mobile-nav-container.active {
            display: block;
            transform: translateX(0);
        }

        /* 移动端导航头部 */
        .mobile-nav-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
            background-color: #1a5fb4;
            color: white;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            position: sticky;
            top: 0;
            z-index: 10;
        }

        .mobile-nav-title {
            font-size: 18px;
            font-weight: bold;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-close-btn {
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s;
        }

        .mobile-close-btn:hover {
            transform: scale(1.1);
        }

        /* 移动端导航菜单 */
        .mobile-nav {
            padding: 0;
            margin: 0;
        }

        /* 一级菜单 */
        .mobile-nav-item {
            border-bottom: 1px solid #eee;
            position: relative;
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            color: #333;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            cursor: pointer;
        }

        .mobile-nav-link:hover {
            background-color: #f5f5f5;
        }

        .mobile-nav-link.active {
            background-color: #f0f7ff;
            color: #1a5fb4;
            font-weight: bold;
        }

        .mobile-nav-link .text {
            flex: 1;
        }

        .mobile-nav-link .arrow {
            color: #666;
            font-size: 14px;
            transition: transform 0.3s;
        }

        .mobile-nav-link.active .arrow {
            color: #1a5fb4;
            transform: rotate(90deg);
        }

        /* 二级菜单 */
        .mobile-submenu {
            max-height: 0;
            overflow: hidden;
            background-color: #f9f9f9;
            transition: max-height 0.4s ease;
            padding-left: 0;
            margin: 0;
        }

        .mobile-submenu.active {
            max-height: 500px;
        }

        .mobile-submenu li {
            border-bottom: 1px solid #eee;
        }

        .mobile-submenu li:last-child {
            border-bottom: none;
        }

        .mobile-submenu a {
            display: flex;
            align-items: center;
            padding: 15px 20px 15px 40px;
            color: #555;
            font-size: 14px;
            transition: all 0.3s;
            text-decoration: none;
        }

        .mobile-submenu a:hover {
            background-color: #f0f7ff;
            color: #1a5fb4;
            padding-left: 45px;
        }

        /* 当前活动菜单样式 */
        .mobile-submenu a.active {
            background-color: #e6f0ff;
            color: #1a5fb4;
            font-weight: 500;
        }

        /* 在PC端隐藏移动端导航按钮和相关容器 */
        @media (min-width: 769px) {
            .mobile-header-controls {
                display: none !important;
            }
            
            .mobile-nav-overlay,
            .mobile-nav-container {
                display: none !important;
            }
        }

        /* 在移动端显示移动端导航按钮 */
        @media (max-width: 768px) {
            .mobile-header-controls {
                display: flex !important;
            }
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }