/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", "微软雅黑", Arial, sans-serif;
        }

        body {
            display: flex;
            height: 100vh;
            overflow: hidden;
            background-color: #f5f7fa;
        }

        /* 侧边栏样式 */
        .sidebar {
            width: 210px;
            background-color: #ffffff;
            border-right: 1px solid #e6e9ec;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
            box-shadow: 0 0 8px rgba(0,0,0,0.02);
        }

        .sidebar-header {
            padding: 18px 20px;
            border-bottom: 1px solid #e6e9ec;
            font-size: 16px;
            font-weight: 600;
            color: #1d2129;
            background-color: #f9fafc;
        }

        .sidebar-menu {
            flex: 1;
            overflow-y: auto;
            padding: 5px 0;
        }

        /* 父菜单样式 */
        .menu-item {
            padding: 12px 20px;
            color: #4e5969;
            cursor: pointer;
            font-size: 14px;
            line-height: 1.5;
            position: relative;
        }

        .menu-item:hover {
            background-color: #f5f7fa;
        }

        .menu-item.active {
            color: #0066cc;
            background-color: #e6f0ff;
            border-left: 3px solid #0066cc;
        }

        .menu-item .arrow {
            position: absolute;
            right: 20px;
            top: 14px;
            font-size: 12px;
            color: #86909c;
            cursor: pointer;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 子菜单容器 */
        .submenu-container {
            display: none;
        }

        /* 子菜单样式 */
        .menu-subitem {
            padding: 10px 20px 10px 30px;
            color: #4e5969;
            font-size: 13px;
            cursor: pointer;
            line-height: 1.5;
        }

        .menu-subitem:hover {
            background-color: #f5f7fa;
        }

        .menu-subitem.active {
            color: #0066cc;
            font-weight: 500;
            background-color: #f0f7ff;
        }

        /* 主内容区 */
        .main {
            flex: 1;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        /* 顶部栏 */
        .topbar {
            height: 50px;
            border-bottom: 1px solid #e6e9ec;
            display: flex;
            align-items: center;
            padding: 0 20px;
            background-color: #ffffff;
            box-shadow: 0 1px 2px rgba(0,0,0,0.03);
        }

        .topbar-path {
            font-size: 14px;
            color: #86909c;
        }

        .topbar-path span {
            color: #4e5969;
            font-weight: 500;
        }

        .topbar-actions {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .topbar-search {
            display: flex;
            align-items: center;
            position: relative;
        }

        .topbar-search input {
            padding: 7px 12px 7px 30px;
            border: 1px solid #dcdfe6;
            border-radius: 4px;
            font-size: 13px;
            width: 220px;
            outline: none;
            transition: border-color 0.2s;
        }

        .topbar-search input:focus {
            border-color: #0066cc;
        }

        .topbar-search .icon-search {
            position: absolute;
            left: 10px;
            top: 8px;
            font-size: 14px;
            color: #86909c;
        }

        .topbar-user {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #4e5969;
            font-size: 13px;
            cursor: pointer;
        }

        .topbar-user .avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: #e6f0ff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0066cc;
            font-size: 12px;
        }

        /* iframe内容区 */
        .content {
            flex: 1;
            overflow: hidden;
            background-color: #ffffff;
            margin: 10px;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }

        .content iframe {
            width: 100%;
            height: 100%;
            border: none;
        }

        /* 移动端适配 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: #4e5969;
            margin-right: 10px;
        }

        @media (max-width: 768px) {
            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                height: 100%;
                z-index: 1000;
                transform: translateX(-100%);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .mobile-toggle {
                display: block;
            }

            .topbar-search input {
                width: 150px;
            }

            .content {
                margin: 5px;
            }

            .topbar-user {
                display: none;
            }

            /* 手机端隐藏面包屑 */
            .topbar-path {
                display: none !important;
            }
        }

        /* 遮罩层 */
        .mask {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.3);
            z-index: 999;
        }

        .mask.show {
            display: block;
        }