:root {
            --primary: #10B981;
            --primary-dark: #059669;
            --primary-light: #E6F4EA;
            --dark: #111827;
            --gray-dark: #1F2937;
            --gray-light: #F3F4F6;
            --text-main: #374151;
            --text-muted: #6B7280;
            --white: #ffffff;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --border-radius: 12px;
        }

        * {
            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-main);
            background-color: #F9FAFB;
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

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

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            border-bottom: 1px solid #E5E7EB;
        }

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

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

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

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

        .nav-menu a {
            text-decoration: none;
            color: var(--gray-dark);
            font-weight: 500;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .nav-menu a:hover {
            color: var(--primary);
        }

        .nav-btn {
            background-color: var(--primary);
            color: var(--white) !important;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: none;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: var(--transition);
        }

        /* Hero Section (No Image) */
        .hero {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            color: var(--white);
            padding: 120px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            right: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            background-color: rgba(16, 185, 129, 0.2);
            color: var(--primary);
            border: 1px solid rgba(16, 185, 129, 0.3);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 25px;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .hero h1 {
            color: var(--white);
            font-size: 3rem;
            max-width: 900px;
            margin: 0 auto 25px;
            font-weight: 800;
        }

        .hero-desc {
            color: #94A3B8;
            font-size: 1.25rem;
            max-width: 700px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
        }

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

        .btn-outline {
            background-color: transparent;
            color: var(--white);
            border: 2px solid rgba(255, 255, 255, 0.2);
        }

        .btn-outline:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        /* Data Badges Grid */
        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 80px;
        }

        .hero-feat-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            backdrop-filter: blur(5px);
        }

        .hero-feat-card h4 {
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 5px;
        }

        .hero-feat-card p {
            color: #94A3B8;
            font-size: 0.9rem;
        }

        /* About Us & Software intro */
        .about {
            background-color: var(--white);
        }

        .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 {
            margin-bottom: 15px;
            color: var(--text-main);
        }

        .highlight-box {
            background-color: var(--primary-light);
            border-left: 4px solid var(--primary);
            padding: 15px 20px;
            margin: 20px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }

        .tech-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 25px;
        }

        .tech-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
        }

        .tech-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        /* Service Cards */
        .services {
            background-color: var(--gray-light);
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--white);
            padding: 35px 25px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            border-top: 4px solid var(--primary);
        }

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

        .service-card h3 {
            margin-bottom: 15px;
            font-size: 1.3rem;
        }

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

        /* Workflow Timeline */
        .workflow {
            background-color: var(--white);
        }

        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background-color: var(--gray-light);
            top: 0;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            background-color: inherit;
            width: 50%;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            right: -10px;
            background-color: var(--white);
            border: 4px solid var(--primary);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }

        .left {
            left: 0;
        }

        .right {
            left: 50%;
        }

        .right::after {
            left: -10px;
        }

        .timeline-content {
            padding: 20px 30px;
            background-color: var(--gray-light);
            position: relative;
            border-radius: var(--border-radius);
        }

        .timeline-content h3 {
            margin-bottom: 10px;
            font-size: 1.2rem;
            color: var(--primary-dark);
        }

        /* Solutions Tag Cloud */
        .solutions {
            background-color: var(--gray-light);
        }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
            max-width: 900px;
            margin: 0 auto;
        }

        .tag {
            background-color: var(--white);
            color: var(--gray-dark);
            padding: 12px 24px;
            border-radius: 30px;
            font-weight: 500;
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
            transition: var(--transition);
            border: 1px solid #E5E7EB;
        }

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

        /* Map Network */
        .network {
            background-color: var(--white);
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 40px;
            align-items: center;
        }

        .network-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .network-card {
            background-color: var(--gray-light);
            padding: 15px 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
        }

        .network-map-placeholder {
            background: linear-gradient(135deg, #1E293B, #0F172A);
            border-radius: var(--border-radius);
            aspect-ratio: 16/9;
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--white);
            font-weight: 600;
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* Standards */
        .standards {
            background-color: var(--gray-light);
        }

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

        .standard-card {
            background: var(--white);
            padding: 30px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
        }

        .standard-num {
            font-size: 2.5rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 15px;
        }

        /* Case Center */
        .cases {
            background-color: var(--white);
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .case-card {
            background: var(--white);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            border: 1px solid #E5E7EB;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0,0,0,0.08);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: var(--gray-light);
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-content {
            padding: 20px;
        }

        .case-content h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

        /* Evaluation Section */
        .evaluation {
            background-color: var(--gray-light);
        }

        .eval-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
        }

        .eval-score-card {
            background-color: var(--white);
            padding: 40px 30px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            border-top: 5px solid var(--primary);
        }

        .score-num {
            font-size: 4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
        }

        .stars {
            color: #FBBF24;
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .eval-table-container {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 20px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            overflow-x: auto;
        }

        .eval-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .eval-table th, .eval-table td {
            padding: 15px;
            border-bottom: 1px solid var(--gray-light);
        }

        .eval-table th {
            font-weight: 700;
            color: var(--dark);
        }

        .highlight-col {
            color: var(--primary);
            font-weight: 600;
        }

        /* Token Pricing */
        .pricing {
            background-color: var(--white);
        }

        .price-table-container {
            background-color: var(--white);
            border: 1px solid #E5E7EB;
            border-radius: var(--border-radius);
            overflow: hidden;
            margin-top: 30px;
        }

        .price-table {
            width: 100%;
            border-collapse: collapse;
        }

        .price-table th {
            background-color: var(--gray-light);
            font-weight: 700;
            padding: 15px 20px;
            text-align: left;
        }

        .price-table td {
            padding: 15px 20px;
            border-bottom: 1px solid #F3F4F6;
        }

        .price-badge {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* Training section */
        .training {
            background: linear-gradient(135deg, #0F172A 0%, #1F2937 100%);
            color: var(--white);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .training-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 25px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--primary);
        }

        .training-card h3 {
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 15px;
        }

        .training-card p {
            color: #94A3B8;
            font-size: 0.9rem;
        }

        /* User Feedback / Testimonials */
        .testimonials {
            background-color: var(--gray-light);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .testimonial-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            position: relative;
        }

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

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .author-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .author-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .author-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAQ Section */
        .faq {
            background-color: var(--white);
        }

        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid #E5E7EB;
            border-radius: var(--border-radius);
            overflow: hidden;
        }

        .faq-question {
            background-color: var(--white);
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
        }

        .faq-question:hover {
            background-color: var(--gray-light);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            background-color: var(--white);
            padding: 0 20px;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
            color: var(--text-muted);
            border-top: 0 solid var(--gray-light);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            max-height: 1000px;
            padding: 20px;
            border-top: 1px solid var(--gray-light);
            transition: max-height 0.5s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
        }

        .faq-icon::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: bold;
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        /* Self-Troubleshooting & Glossary */
        .troubleshoot {
            background-color: var(--gray-light);
        }

        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .glossary-card {
            background: var(--white);
            padding: 20px;
            border-radius: var(--border-radius);
            border-top: 3px solid var(--primary-dark);
        }

        .glossary-card h4 {
            margin-bottom: 10px;
            color: var(--dark);
        }

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

        /* News / Knowledge Base */
        .news {
            background-color: var(--white);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .news-card {
            background-color: var(--white);
            border: 1px solid #E5E7EB;
            border-radius: var(--border-radius);
            padding: 25px;
            transition: var(--transition);
        }

        .news-card:hover {
            box-shadow: 0 8px 16px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 10px;
        }

        .news-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .news-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .news-link {
            color: var(--primary-dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Forms & Interactive Matching */
        .form-section {
            background-color: var(--gray-light);
        }

        .form-container {
            max-width: 700px;
            margin: 0 auto;
            background-color: var(--white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #E5E7EB;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }

        textarea.form-control {
            resize: vertical;
            height: 120px;
        }

        /* Contact & Floating Widgets */
        .contact {
            background-color: var(--white);
        }

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

        .contact-info h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .contact-details {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-bottom: 30px;
        }

        .contact-details li {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qrcode-wrap {
            display: flex;
            align-items: center;
            gap: 20px;
            background-color: var(--gray-light);
            padding: 20px;
            border-radius: var(--border-radius);
            width: fit-content;
        }

        .qrcode-wrap img {
            width: 100px;
            height: 100px;
            border-radius: 6px;
        }

        .floating-kf {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background-color: var(--primary);
            color: var(--white);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.4);
            cursor: pointer;
            transition: var(--transition);
        }

        .floating-kf:hover {
            transform: scale(1.1);
            background-color: var(--primary-dark);
        }

        /* Footer */
        footer {
            background-color: #0F172A;
            color: #94A3B8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94A3B8;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

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

        .friend-links a {
            color: #64748B;
            text-decoration: none;
            transition: var(--transition);
        }

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

        /* Mobile Responsive */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-features {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .network-grid, .eval-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                padding: 20px;
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item::after {
                left: 21px;
            }
            .right {
                left: 0%;
            }
            .hero-features {
                grid-template-columns: 1fr;
            }
            .standards-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }