:root {
            --primary: #FFD200;
            --primary-hover: #E6BC00;
            --primary-light: #FFF9E6;
            --dark: #111111;
            --dark-gray: #2A2A2A;
            --light-gray: #F8F9FA;
            --border-color: #EAEAEA;
            --text-dark: #1F1F1F;
            --text-muted: #666666;
            --transition: all 0.3s ease;
        }

        /* Base styles */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            background-color: #ffffff;
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        /* Container grid */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--dark);
        }

        .brand-name span {
            background-color: var(--primary);
            padding: 2px 6px;
            border-radius: 4px;
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--dark-gray);
            padding: 5px 10px;
            border-radius: 4px;
        }

        .nav-links a:hover {
            background-color: var(--primary-light);
            color: var(--dark);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--dark);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--dark);
            color: var(--dark);
        }

        .btn-outline:hover {
            background-color: var(--dark);
            color: #ffffff;
            transform: translateY(-2px);
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section - NO IMAGES */
        .hero {
            background: linear-gradient(135deg, #111111 0%, #2A2A2A 100%);
            color: #ffffff;
            padding: 100px 0 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,210,0,0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-badge {
            background-color: rgba(255, 210, 0, 0.15);
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 25px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 25px;
            letter-spacing: -1px;
        }

        .hero h1 span {
            color: var(--primary);
            position: relative;
            display: inline-block;
        }

        .hero-desc {
            font-size: 1.15rem;
            max-width: 800px;
            margin: 0 auto 40px auto;
            color: #CCCCCC;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 40px;
        }

        .stat-item h3 {
            font-size: 2rem;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 5px;
        }

        .stat-item p {
            font-size: 0.85rem;
            color: #AAAAAA;
        }

        /* Section Layouts */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-light {
            background-color: var(--light-gray);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 55px auto;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background-color: var(--primary);
            margin: 10px auto 0 auto;
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
        }

        /* Grid layouts */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            align-items: center;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        /* About Us & Platform Intro */
        .about-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .about-content p {
            color: var(--text-dark);
            font-size: 1rem;
            line-height: 1.8;
        }

        .highlight-box {
            background-color: var(--primary-light);
            border-left: 5px solid var(--primary);
            padding: 20px;
            border-radius: 0 8px 8px 0;
        }

        .square-img-container {
            display: flex;
            justify-content: center;
            align-items: center;
            background: #ffffff;
            border: 2px solid var(--dark);
            box-shadow: 8px 8px 0px var(--dark);
            padding: 10px;
            border-radius: 8px;
            overflow: hidden;
        }

        .square-img-container img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            object-fit: cover;
        }

        /* AIGC Services Cards */
        .card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .card-icon {
            font-size: 2rem;
            background-color: var(--primary-light);
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            margin-bottom: 20px;
            color: var(--dark);
            font-weight: bold;
        }

        .card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* Model tags list */
        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }

        .model-tag {
            background-color: #F0F0F0;
            color: var(--dark-gray);
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        .model-tag.hot {
            background-color: var(--primary);
            color: var(--dark);
        }

        /* Horizontal Layout for Production section */
        .horizontal-media-box {
            margin-top: 40px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .horizontal-media-box img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        /* Process Steps */
        .step-container {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            position: relative;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 25px 15px;
            border-radius: 8px;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary);
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px auto;
            border: 2px solid var(--dark);
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Review and Comparison Table */
        .rating-box {
            text-align: center;
            background-color: var(--primary-light);
            padding: 30px;
            border-radius: 8px;
            border: 2px solid var(--primary);
            margin-bottom: 40px;
        }

        .rating-stars {
            font-size: 2.2rem;
            color: var(--primary-hover);
            margin-bottom: 10px;
        }

        .rating-num {
            font-size: 3rem;
            font-weight: 800;
            color: var(--dark);
        }

        .rating-num span {
            font-size: 1.2rem;
            color: var(--text-muted);
        }

        .comparison-table-wrapper {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: #ffffff;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        th, td {
            padding: 15px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: var(--dark);
            color: #ffffff;
            font-weight: 600;
        }

        tr:nth-child(even) {
            background-color: var(--light-gray);
        }

        tr.highlight-row {
            background-color: var(--primary-light);
            font-weight: 600;
        }

        /* Token Comparison Table Specific */
        .token-price {
            font-family: monospace;
            font-weight: bold;
            color: #2e7d32;
        }

        /* Case Studies images section */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .case-card {
            background: #ffffff;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .case-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }

        .case-info {
            padding: 15px;
        }

        .case-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .case-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .testimonial-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            position: relative;
        }

        .testimonial-text {
            font-size: 0.9rem;
            color: var(--text-dark);
            line-height: 1.6;
            margin-bottom: 20px;
            font-style: italic;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 0.9rem;
            color: var(--dark);
        }

        .user-meta h5 {
            font-size: 0.9rem;
            font-weight: 700;
        }

        .user-meta span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 18px 20px;
            font-size: 1rem;
            font-weight: 600;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--dark);
        }

        .faq-question::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: 700;
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light-gray);
        }

        .faq-answer-inner {
            padding: 20px;
            font-size: 0.9rem;
            color: var(--text-dark);
            line-height: 1.6;
        }

        /* Self Troubleshooting & AI Glossary */
        .tabs-container {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: #ffffff;
            overflow: hidden;
        }

        .tab-headers {
            display: flex;
            background-color: var(--light-gray);
            border-bottom: 1px solid var(--border-color);
        }

        .tab-btn {
            flex: 1;
            padding: 15px;
            border: none;
            background: none;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .tab-btn.active {
            background-color: #ffffff;
            border-bottom: 2px solid var(--primary);
            color: var(--dark);
        }

        .tab-pane {
            display: none;
            padding: 25px;
        }

        .tab-pane.active {
            display: block;
        }

        /* Articles section */
        .article-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .article-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .article-link {
            font-size: 0.85rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .article-link:hover {
            color: var(--primary-hover);
        }

        /* Form styling */
        .form-section {
            background: linear-gradient(135deg, #FFD200 0%, #FFA200 100%);
            padding: 60px 0;
            border: none;
        }

        .form-wrapper {
            background-color: #ffffff;
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
            padding: 40px;
            max-width: 700px;
            margin: 0 auto;
        }

        .form-wrapper h3 {
            font-size: 1.6rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 30px;
            color: var(--dark);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--dark-gray);
        }

        .form-control {
            border: 1.5px solid var(--border-color);
            padding: 12px 15px;
            border-radius: 6px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--dark);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        .form-submit-btn {
            width: 100%;
            background-color: var(--dark);
            color: #ffffff;
            font-size: 1rem;
            padding: 14px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 700;
            transition: var(--transition);
        }

        .form-submit-btn:hover {
            background-color: #222222;
            transform: translateY(-2px);
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: #ffffff;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            font-size: 1.4rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 15px;
        }

        .footer-brand p {
            color: #CCCCCC;
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .footer-links h5, .footer-contact h5 {
            font-size: 1.05rem;
            margin-bottom: 20px;
            color: #ffffff;
            border-left: 3px solid var(--primary);
            padding-left: 10px;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            color: #CCCCCC;
        }

        .footer-links ul li a:hover {
            color: var(--primary);
            padding-left: 5px;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            color: #CCCCCC;
        }

        .qrcode-container {
            display: flex;
            gap: 15px;
            margin-top: 15px;
        }

        .qrcode-item {
            text-align: center;
            font-size: 0.75rem;
            color: #AAAAAA;
        }

        .qrcode-item img {
            width: 80px;
            height: 80px;
            border-radius: 4px;
            margin-bottom: 5px;
            background: #ffffff;
            padding: 3px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            margin-bottom: 20px;
        }

        .friend-links h5 {
            width: 100%;
            margin-bottom: 10px;
            font-size: 0.85rem;
            color: #AAAAAA;
        }

        .friend-links a {
            color: #CCCCCC;
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #888888;
            font-size: 0.8rem;
        }

        /* Floating Widgets */
        .floating-widget {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .floating-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            border: 2px solid var(--dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            transition: var(--transition);
            position: relative;
        }

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

        .floating-btn svg {
            width: 24px;
            height: 24px;
            fill: var(--dark);
        }

        .qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #ffffff;
            border: 2px solid var(--dark);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            display: none;
            text-align: center;
            width: 150px;
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        .qr-popover p {
            font-size: 0.75rem;
            color: var(--dark);
            font-weight: 700;
        }

        .floating-btn:hover .qr-popover {
            display: block;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4, .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-container {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .step-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid, .article-list {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
            .horizontal-media-box {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .hero-buttons {
                flex-direction: column;
                padding: 0 20px;
            }
            .step-container {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-brand {
                grid-column: span 1;
            }
        }