/* 重置样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html, body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: #ffffff;
            color: #333333;
            line-height: 1.6;
            overflow-x: hidden;
            overflow-y: auto;
            position: relative;
            height: 100%;
        }

        /* 侧边栏 */
        .sidebar {
            position: absolute;
            left: 0;
            top: 0;
            width: 240px;
            min-height: 100%;
            background: #ffffff;
            border-right: 1px solid #e5e7eb;
            z-index: 1000;
        }

        .sidebar-panel {
            display: flex;
            flex-direction: column;
            min-height: 100%;
        }

        .sidebar-header {
            padding: 24px 20px;
            border-bottom: 1px solid #e5e7eb;
            flex-shrink: 0;
        }

        .sidebar-title {
            font-size: 24px;
            font-weight: 600;
            color: #1f2937;
            margin-bottom: 6px;
        }

        .sidebar-subtitle {
            font-size: 16px;
            color: #6b7280;
        }

        .sidebar-nav {
            padding: 20px 0;
            flex: 1 1 auto;
        }

        .nav-group {
            margin-bottom: 24px;
        }

        .nav-group-account .nav-item {
            margin: 0;
            border-radius: 0;
            background: transparent;
            border: none;
            color: #6b7280;
            font-weight: 400;
            transition: all 0.2s ease;
        }

        .nav-group-account .nav-item:hover {
            background: #f3f4f6;
            border-color: transparent;
            color: #374151;
        }

        .nav-group-account .nav-item.active {
            background: #f3f4f6;
            border-right: 3px solid #667eea;
            color: #1f2937;
            font-weight: 500;
            box-shadow: none;
        }

        .nav-group-title {
            font-size: 14px;
            font-weight: 500;
            color: #9ca3af;
            margin-bottom: 12px;
            padding: 0 20px;
            text-transform: uppercase;
            letter-spacing: 0.6px;
        }

        .nav-group-account .nav-item i {
            color: #2563eb;
        }

        .nav-group-categories .nav-item i {
            color: #6b7280;
        }

        .nav-group-title {
            font-size: 14px;
            font-weight: 500;
            color: #9ca3af;
            margin-bottom: 8px;
            padding: 0 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 15px 20px;
            color: #6b7280;
            text-decoration: none;
            transition: all 0.2s;
            font-size: 17px;
            cursor: pointer;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
        }
        
        .nav-item i {
            font-size: 22px;
            flex-shrink: 0;
        }

        .nav-item .nav-item-label {
            flex: 1;
            line-height: 1.5;
        }

        .nav-item:hover {
            background: #f3f4f6;
            color: #374151;
        }

        .nav-item.active {
            background: #f3f4f6;
            color: #1f2937;
            font-weight: 500;
            border-right: 3px solid #667eea;
        }

        .sidebar-qa-link {
            display: inline-block;
            color: #667eea;
            text-decoration: none;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 12px;
        }

        .sidebar-qa-link:hover {
            color: #5a67d8;
            text-decoration: underline;
        }

        /* 主内容区 */
        .main-content {
            margin-left: 240px;
            background: #ffffff;
            padding: 32px;
            position: relative;
        }

        .page-header {
            margin-bottom: 32px;
        }

        .page-title {
            font-size: 32px;
            font-weight: 600;
            color: #333333;
            margin-bottom: 8px;
        }

        .page-subtitle {
            font-size: 18px;
            color: #666666;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            z-index: 1001;
            background: #ffffff;
            border: none;
            border-left: 1px solid #e5e7eb;
            border-bottom: 1px solid #e5e7eb;
            border-radius: 0 0 0 8px;
            padding: 12px 16px;
            font-size: 16px;
            font-weight: 500;
            color: #374151;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            align-items: center;
            justify-content: center;
            gap: 6px;
            width: auto;
            height: 48px;
            padding: 0 16px;
            font-size: 16px;
        }

        .mobile-menu-btn:hover {
            background: #f9fafb;
            border-color: #667eea;
            color: #667eea;
        }

        .mobile-menu-btn i {
            font-size: 20px;
        }

        /* 移动端遮罩层 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.15);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .sidebar-overlay.show {
            opacity: 1;
        }

        /* 移动端响应式 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
            }

            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: auto;
                background: transparent;
                padding: 0;
                box-sizing: border-box;
                transform: translateY(-100%);
                transition: transform 0.3s ease;
                display: flex;
                justify-content: center;
                pointer-events: none;
            }

            .sidebar.open {
                transform: translateY(0);
                pointer-events: auto;
            }

            .sidebar-panel {
                background: #ffffff;
                width: calc(100% - 24px);
                max-width: 560px;
                border-radius: 0 0 22px 22px;
                padding: 26px 20px 28px;
                box-shadow: 0 14px 32px rgba(15, 23, 42, 0.12);
                max-height: calc(100vh - 60px);
                overflow-y: auto;
                -webkit-overflow-scrolling: touch;
            }

            .sidebar-panel::-webkit-scrollbar {
                display: none;
            }

            .sidebar-close {
                display: flex;
            }

            .sidebar-header {
                border-bottom: 1px solid #eef2f7;
                padding: 4px 0 16px;
                text-align: left;
            }

            .sidebar-title {
                font-size: 20px;
                font-weight: 700;
                color: #0f172a;
            }

            .sidebar-subtitle {
                font-size: 13px;
                color: #97a0af;
            }

            .sidebar-nav {
                padding: 20px 0 12px;
                display: flex;
                flex-direction: column;
                gap: 22px;
            }

            .nav-group {
                margin-bottom: 0;
            }

            .nav-group-title {
                padding: 0;
                font-size: 11px;
                letter-spacing: 1.1px;
                text-transform: uppercase;
                color: #a1a9b8;
                margin-bottom: 12px;
            }

            .nav-group-account .nav-item {
                padding: 15px 16px;
                border-radius: 14px;
                background: #f8fafc;
                border: 1px solid #eef2f6;
                box-shadow: none;
                font-size: 15px;
                color: #1f2937;
                font-weight: 500;
                transition: all 0.2s ease;
            }

            .nav-group-account .nav-item i {
                font-size: 20px;
                color: #2563eb;
            }

            .nav-group-account .nav-item:hover {
                background: #eff4ff;
                border-color: rgba(37, 99, 235, 0.3);
                transform: translateY(-2px);
                box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
            }

            .nav-group-categories {
                display: grid;
                grid-template-columns: repeat(2, minmax(0, 1fr));
                gap: 14px;
            }

            .nav-group-categories .nav-group-title {
                grid-column: 1 / -1;
                margin-bottom: 6px;
            }

            .nav-group-categories .nav-item {
                background: #f8fafc;
                border-radius: 16px;
                padding: 16px;
                border: 1px solid #eef2f6;
                display: flex;
                flex-direction: column;
                align-items: flex-start;
                font-size: 15px;
                gap: 12px;
                box-shadow: none;
                transition: all 0.2s ease;
            }

            .nav-group-categories .nav-item i {
                font-size: 22px;
                margin-right: 0;
                color: #2563eb;
            }

            .nav-group-categories .nav-item .nav-item-label {
                color: #1f2937;
                font-size: 15px;
                line-height: 1.4;
            }

            .nav-group-categories .nav-item:hover {
                background: #eff4ff;
                border-color: rgba(37, 99, 235, 0.3);
                transform: translateY(-2px);
                color: #1f2937;
                box-shadow: 0 6px 16px rgba(37, 99, 235, 0.12);
            }

            .nav-group-categories .nav-item:hover i {
                color: #1d4ed8;
            }

            .nav-group-categories .nav-item.active {
                background: #eaf2ff;
                border-color: rgba(37, 99, 235, 0.4);
                box-shadow: 0 8px 18px rgba(37, 99, 235, 0.15);
                color: #1f2937;
            }

            .nav-group-categories .nav-item.active i {
                color: #1d4ed8;
            }

            .sidebar-overlay.show {
                display: block;
                background: transparent;
            }

            .main-content {
                margin-left: 0;
                padding: 20px;
                padding-top: 70px;
            }

            .page-title {
                font-size: 24px;
            }

            .page-subtitle {
                font-size: 16px;
            }

            .sidebar-icp-block {
                padding: 16px 20px !important;
                font-size: 11px;
            }
        }