* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Roboto', sans-serif;
            background-color: #f5f5f5;
            color: #333;
        }

        /* Header */
        .header {
            background-color: #2d2d2d;
            padding: 12px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, #4a9fd8 0%, #2b7eb8 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .logo::before {
            content: '';
            position: absolute;
            width: 20px;
            height: 3px;
            background: white;
            transform: rotate(-45deg);
        }

        .logo::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 3px;
            background: white;
            transform: rotate(45deg);
        }

        .site-title {
            color: white;
            font-size: 18px;
            font-weight: 400;
            letter-spacing: 0.3px;
        }

        .search-container {
            flex: 1;
            max-width: 400px;
            margin: 0 24px;
        }

        .search-box {
            width: 100%;
            padding: 10px 16px;
            background-color: #3d3d3d;
            border: none;
            border-radius: 20px;
            color: white;
            font-size: 14px;
        }

        .search-box::placeholder {
            color: white;
        }

        .header-icon {
            color: white;
            font-size: 20px;
            cursor: pointer;
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }

        /* Main Container */
        .container {
            display: flex;
            min-height: calc(100vh - 56px);
        }

        /* Sidebar */
        .sidebar {
            width: 256px;
            background-color: #3c8dbc;
            color: white;
            flex-shrink: 0;
            transition: transform 0.3s ease;
            position: fixed;
            left: 0;
            top: 56px;
            height: calc(100vh - 56px);
            overflow-y: auto;
        }
        
        /* Scrollbar styling for sidebar */
        .sidebar::-webkit-scrollbar {
            width: 6px;
        }
        
        .sidebar::-webkit-scrollbar-track {
            background: rgba(0,0,0,0.1);
        }
        
        .sidebar::-webkit-scrollbar-thumb {
            background: rgba(0,0,0,0.3);
            border-radius: 3px;
        }

        .sidebar-item {
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            transition: background-color 0.2s;
            border-left: 3px solid transparent;
            font-size: 14px;
            font-weight: 400;
        }

        .sidebar-item:hover {
            background-color: #1a79af;
        }

        .sidebar-item.active {
            background-color: #1a79af;
            border-left-color: rgba(0,0,0,0.1);
        }

        .sidebar-item i {
            width: 20px;
            font-size: 18px;
        }

        .sidebar-section {
            margin-top: 24px;
            padding: 0 20px 8px;
            font-size: 12px;
            opacity: 0.8;
            font-weight: 500;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            background-color: #f5f5f5;
            overflow-y: auto;
            margin-left: 256px;
        }

        .content-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0px 24px;
            margin-right: 280px;
        }

        .welcome-title {
            font-size: 28px;
            font-weight: 400;
            color: #4a4a4a;
            margin-bottom: 24px;
        }

        .intro-text {
            color: #555;
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .intro-text a {
            color: #3c8dbc;
            text-decoration: underline;
        }

        .help-methods {
            margin: 24px 0;
        }

        .help-method {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
            color: #555;
        }

        .help-method i {
            color: #f39c12;
            font-size: 18px;
            margin-top: 2px;
        }

        .help-method strong {
            color: #333;
        }

        .help-method a {
            color: #3c8dbc;
            text-decoration: underline;
        }

        .tagline {
            color: #777;
            font-style: italic;
            margin: 24px 0 32px;
        }

        /* Machines Section */
        .section-title {
            font-size: 24px;
            font-weight: 400;
            color: #4a4a4a;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 1px solid #ddd;
            scroll-margin-top: 80px;
        }

        .machines-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }

        .machine-card {
            background: white;
            border: 1px solid #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .machine-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            transform: translateY(-2px);
        }

        .machine-image {
            width: 100%;
            height: 180px;
            padding:36px;
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border-bottom: 1px solid #e0e0e0;
            position: relative;
            overflow: hidden;
        }

        .machine-image img {
            max-width: 90%;
            max-height: 90%;
            object-fit: contain;
        }

        .machine-placeholder {
            width: 140px;
            height: 100px;
            background: linear-gradient(135deg, #3c8dbc 0%, #2e7aa8 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(60, 141, 188, 0.3);
        }

        .machine-placeholder i {
            color: white;
            font-size: 48px;
        }

        .machine-name {
            padding: 16px;
            text-align: center;
            font-size: 18px;
            font-weight: 500;
            color: #333;
        }

        /* Right Sidebar */
        .right-sidebar {
            width: 280px;
            background: white;
            padding: 24px;
            border-left: 1px solid #e0e0e0;
            position: fixed;
            right: 0;
            top: 56px;
            height: calc(100vh - 56px);
            overflow-y: auto;
        }
        
        /* Scrollbar styling for right sidebar */
        .right-sidebar::-webkit-scrollbar {
            width: 6px;
        }
        
        .right-sidebar::-webkit-scrollbar-track {
            background: #f5f5f5;
        }
        
        .right-sidebar::-webkit-scrollbar-thumb {
            background: #ccc;
            border-radius: 3px;
        }
        
        .right-sidebar::-webkit-scrollbar-thumb:hover {
            background: #999;
        }

        .right-sidebar-title {
            font-size: 12px;
            color: #999;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
            font-weight: 500;
        }

        .sidebar-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 0;
            color: #333;
            text-decoration: none;
            border-bottom: 1px solid #f0f0f0;
            transition: color 0.2s;
        }

        .sidebar-link:hover {
            color: #3c8dbc;
        }

        .sidebar-link i {
            color: #3c8dbc;
            font-size: 12px;
        }

        .tags-section {
            margin-top: 32px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #e8f4f8;
            color: #3c8dbc;
            padding: 6px 12px;
            border-radius: 16px;
            font-size: 13px;
            margin: 4px;
            cursor: pointer;
            transition: all 0.2s;
        }

        .tag:hover {
            background: #3c8dbc;
            color: white;
        }

        .tag i {
            font-size: 11px;
        }

        /* Action Buttons */
        .action-buttons {
            display: flex;
            gap: 12px;
            margin: 24px 0;
        }

        .action-btn {
            background: white;
            border: 1px solid #e0e0e0;
            padding: 8px 12px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.2s;
            color: #666;
        }

        .action-btn:hover {
            background: #f5f5f5;
            color: #333;
        }

        /* Chat Button */
        .chat-button {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 56px;
            height: 56px;
            background: #3c8dbc;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(60, 141, 188, 0.4);
            transition: all 0.3s;
            z-index: 999;
        }

        .chat-button:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 16px rgba(60, 141, 188, 0.5);
        }

        .chat-button i {
            color: white;
            font-size: 24px;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .right-sidebar {
                display: none;
            }
            
            .content-wrapper {
                margin-right: 0;
            }
        }

        @media (max-width: 768px) {
            .header {
                padding: 12px 16px;
            }

            .menu-toggle {
                display: block;
                order: -1;
            }

            .site-title {
                font-size: 16px;
            }

            .search-container {
                max-width: none;
                margin: 0 12px;
            }

            .sidebar {
                transform: translateX(-100%);
                z-index: 999;
                box-shadow: 2px 0 8px rgba(0,0,0,0.2);
            }

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

            .container {
                flex-direction: column;
            }

            .main-content {
                width: 100%;
                margin-left: 0;
            }

            .content-wrapper {
                padding: 20px 16px;
                margin-right: 0;
            }

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

            .section-title {
                font-size: 20px;
            }

            .machines-grid {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
                gap: 16px;
            }

            .machine-image {
                height: 140px;
            }
        }

        @media (max-width: 480px) {
            .search-container {
                display: none;
            }

            .machines-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
                gap: 12px;
            }

            .chat-button {
                width: 48px;
                height: 48px;
                bottom: 16px;
                right: 16px;
            }

            .chat-button i {
                font-size: 20px;
            }
        }

        /* Overlay for mobile sidebar */
        .overlay {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            width: 100%;
            height: calc(100vh - 56px);
            background: rgba(0,0,0,0.5);
            z-index: 998;
        }

        .overlay.active {
            display: block;
        }