/* CSS Reset & Variables */
        :root {
            --primary: #0d9488;
            --primary-light: #ccfbf1;
            --primary-dark: #115e59;
            --secondary: #0ea5e9;
            --accent: #22d3ee;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --gradient-tech: linear-gradient(135deg, #0d9488 0%, #0ea5e9 100%);
            --gradient-soft: linear-gradient(180deg, #f0fdfa 0%, #f8fafc 100%);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 20px -2px rgba(13, 148, 136, 0.08);
            --shadow-lg: 0 10px 30px -3px rgba(13, 148, 136, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary-dark);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

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

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: none;
            gap: 8px;
        }

        .btn-primary {
            background: var(--gradient-tech);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
        }

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

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

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

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

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

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 6px 12px;
            border-radius: 4px;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--primary-dark);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Hero Section (No Image Allowed) */
        .hero {
            background: var(--gradient-soft);
            padding: 160px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 120%;
            height: 120%;
            background: radial-gradient(circle, rgba(13,148,136,0.05) 0%, rgba(255,255,255,0) 70%);
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 24px;
            color: var(--text-dark);
            background: linear-gradient(135deg, #115e59 30%, #0ea5e9 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        /* Highlight feature tags inside Hero container */
        .hero-features-list {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border-color);
            padding-top: 40px;
        }

        .hero-feature-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .hero-feature-item svg {
            width: 20px;
            height: 20px;
            color: var(--primary);
        }

        /* Stats Cards */
        .stats-section {
            background-color: #ffffff;
            padding: 60px 0;
            margin-top: -50px;
            z-index: 10;
            position: relative;
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-card h3 {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .stat-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* About & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .about-points {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .about-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }

        .about-points li::before {
            content: '✓';
            color: var(--primary);
            font-weight: bold;
        }

        .about-visual {
            background: var(--gradient-tech);
            border-radius: 20px;
            padding: 40px;
            color: #ffffff;
            box-shadow: var(--shadow-lg);
        }

        .about-visual h4 {
            color: #ffffff;
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .about-visual-tagline {
            opacity: 0.9;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* Services & Models Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* Tag Cloud for Supported Platforms */
        .platforms-box {
            margin-top: 60px;
            background-color: #ffffff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .platforms-box h3 {
            text-align: center;
            font-size: 1.4rem;
            margin-bottom: 24px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .tag-cloud span {
            background-color: var(--bg-light);
            color: var(--text-dark);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .tag-cloud span:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        /* AIGC Standard Flow & Network */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .flow-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-color);
            position: relative;
            z-index: 2;
        }

        .flow-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-light);
            position: absolute;
            top: 15px;
            right: 20px;
            line-height: 1;
        }

        .flow-card h3 {
            font-size: 1.15rem;
            margin-top: 15px;
            margin-bottom: 10px;
        }

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

        /* Cases Section (With actual images allowed here) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .case-img-container {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: #e2e8f0;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-body {
            padding: 24px;
        }

        .case-tag {
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-body h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .case-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Comparison and API Token Pricing */
        .pricing-section {
            background: var(--gradient-soft);
        }

        .comparison-card {
            background-color: #ffffff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            margin-bottom: 50px;
        }

        .comparison-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-box {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .rating-stars {
            color: #f59e0b;
            font-size: 1.5rem;
        }

        .rating-score {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-dark);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .comparison-table th, 
        .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--bg-light);
            color: var(--text-dark);
            font-weight: 600;
        }

        .comparison-table tr:hover {
            background-color: rgba(13, 148, 136, 0.02);
        }

        .badge-check {
            color: var(--primary);
            font-weight: bold;
        }

        .badge-cross {
            color: #ef4444;
        }

        /* Training section (工信部) */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .training-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .training-item {
            background-color: #ffffff;
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            border-radius: 0 8px 8px 0;
            box-shadow: var(--shadow-sm);
        }

        .training-item h4 {
            font-size: 1.1rem;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }

        .training-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .testimonial-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-content {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

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

        .author-avatar {
            width: 44px;
            height: 44px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .author-info h4 {
            font-size: 0.95rem;
            color: var(--text-dark);
        }

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

        /* FAQ accordion */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
            max-width: 900px;
            margin: 0 auto;
        }

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

        .faq-btn {
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 15px;
        }

        .faq-btn::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-btn::after {
            content: '−';
            transform: rotate(180deg);
        }

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

        .faq-content p {
            padding: 20px 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }

        /* Self troubleshoot & Encyclopedia */
        .kb-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 60px;
        }

        .kb-box {
            background-color: #ffffff;
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .kb-box h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            border-left: 4px solid var(--primary);
            padding-left: 12px;
        }

        .kb-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .kb-list li strong {
            color: var(--primary-dark);
            display: block;
            margin-bottom: 4px;
        }

        .kb-list li span {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Articles & Knowledgebase */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .article-card {
            background-color: #ffffff;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 24px;
            transition: var(--transition);
        }

        .article-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .article-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .article-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .article-card h3 a {
            color: var(--text-dark);
            text-decoration: none;
            transition: var(--transition);
        }

        .article-card h3 a:hover {
            color: var(--primary);
        }

        .article-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        /* Contact & Form Section */
        .contact-section {
            background: var(--gradient-soft);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info-panel {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .contact-info-panel h3 {
            font-size: 1.5rem;
            margin-bottom: 24px;
        }

        .contact-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 30px;
        }

        .contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .contact-icon {
            width: 40px;
            height: 40px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .contact-text h4 {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        .contact-text p {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
        }

        .qr-codes {
            display: flex;
            gap: 24px;
            border-top: 1px solid var(--border-color);
            padding-top: 30px;
            flex-wrap: wrap;
        }

        .qr-item {
            text-align: center;
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 4px;
            background: #ffffff;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Submission Form */
        .form-panel {
            background-color: #ffffff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .form-panel h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }

        .form-panel p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 30px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
            background-color: var(--bg-light);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
        }

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

        /* Footer & Friend Links */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: #ffffff;
            margin-bottom: 16px;
            font-size: 1.25rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .friend-links-box {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            margin-bottom: 30px;
        }

        .friend-links-box h5 {
            color: #ffffff;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .friend-links-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links-wrapper a {
            color: #64748b;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
        }

        /* Floating customer service widget */
        .floating-widget {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .widget-item {
            width: 50px;
            height: 50px;
            background-color: #ffffff;
            border-radius: 50%;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }

        .widget-item:hover {
            transform: scale(1.1);
            background-color: var(--primary-light);
        }

        .widget-item svg {
            width: 24px;
            height: 24px;
            color: var(--primary);
        }

        .widget-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 16px;
            box-shadow: var(--shadow-lg);
            display: none;
            text-align: center;
            min-width: 150px;
        }

        .widget-popover img {
            width: 110px;
            height: 110px;
            margin-bottom: 8px;
        }

        .widget-popover p {
            font-size: 0.8rem;
            color: var(--text-dark);
            font-weight: 600;
        }

        .widget-item:hover .widget-popover {
            display: block;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid,
            .testimonial-grid,
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid,
            .training-grid,
            .contact-grid,
            .kb-grid {
                grid-template-columns: 1fr;
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-actions {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1.1rem;
            }
            .case-grid,
            .testimonial-grid,
            .articles-grid,
            .flow-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .floating-widget {
                bottom: 20px;
                right: 20px;
            }
        }

        /* Mobile Nav overlay */
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            background: #ffffff;
            border-bottom: 1px solid var(--border-color);
            padding: 20px;
            z-index: 999;
            display: none;
            flex-direction: column;
            gap: 15px;
            box-shadow: var(--shadow-lg);
        }

        .mobile-nav a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            padding: 10px;
            border-radius: 4px;
        }

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