:root {
            --primary: #E53E3E;
            --primary-hover: #C53030;
            --primary-light: #FFF5F5;
            --accent: #FF5722;
            --dark: #2D3748;
            --text: #4A5568;
            --text-dark: #1A202C;
            --bg-light: #FDF8F7;
            --border-color: #FEB2B2;
            --card-shadow: 0 10px 30px rgba(229, 62, 62, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
        }

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

        /* Common Section Layout */
        section {
            padding: 80px 0;
            border-bottom: 1px solid #F7D2C4;
        }

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

        .section-header h2 {
            font-size: 2rem;
            color: var(--text-dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
            font-weight: 800;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

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

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(229, 62, 62, 0.3);
        }

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

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

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

        /* Navigation */
        header {
            position: sticky;
            top: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            border-bottom: 2px solid var(--primary-light);
        }

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

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

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

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

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

        .nav-btn {
            font-size: 0.9rem;
            padding: 8px 20px;
        }

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

        /* Hero (No Image) */
        .hero-section {
            background: linear-gradient(135deg, #FFF5F5 0%, #FFFBFB 50%, #FFEBEB 100%);
            padding: 100px 0 80px 0;
            position: relative;
            overflow: hidden;
            border-bottom: 2px solid var(--border-color);
        }

        .hero-bg-shapes {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .hero-shape {
            position: absolute;
            background: linear-gradient(45deg, rgba(229, 62, 62, 0.05) 0%, rgba(255, 87, 34, 0.03) 100%);
            border-radius: 50%;
        }

        .hero-shape-1 { width: 400px; height: 400px; top: -100px; right: -100px; }
        .hero-shape-2 { width: 300px; height: 300px; bottom: -50px; left: -50px; }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 850px;
            margin: 0 auto;
        }

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

        h1.hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--text-dark);
            font-weight: 800;
            margin-bottom: 24px;
        }

        .hero-desc {
            font-size: 1.2rem;
            margin-bottom: 36px;
            color: var(--text);
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
        }

        /* 20 Sections Styles */

        /* 2. About us */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.6rem;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .about-features {
            margin-top: 24px;
            list-style: none;
        }

        .about-features li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
            color: var(--text-dark);
        }

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

        /* 3. Service System */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: #ffffff;
            border: 1px solid #FFE3E3;
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--card-shadow);
        }

        .service-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: 0 15px 35px rgba(229, 62, 62, 0.1);
        }

        .service-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        /* 4. Workflow */
        .workflow-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            flex-wrap: wrap;
            gap: 20px;
        }

        .workflow-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            background: #ffffff;
            border: 1px solid #FFE3E3;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--card-shadow);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            font-weight: 700;
        }

        /* 5. Solutions */
        .solutions-tabs {
            background-color: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
        }

        .tabs-header {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .tab-btn {
            background: none;
            border: 1px solid var(--border-color);
            padding: 10px 24px;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        .tab-pane {
            display: none;
        }

        .tab-pane.active {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: center;
        }

        /* 6. Network */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

        .network-list {
            list-style: none;
        }

        .network-list li {
            padding: 12px 16px;
            margin-bottom: 8px;
            background: #ffffff;
            border-left: 4px solid var(--primary);
            border-radius: 0 8px 8px 0;
            box-shadow: var(--card-shadow);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 7. Standard process */
        .process-timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline-item {
            display: flex;
            margin-bottom: 40px;
            position: relative;
        }

        .timeline-marker {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--primary);
            border: 4px solid #ffffff;
            box-shadow: 0 0 0 4px var(--primary-light);
            margin-right: 20px;
            flex-shrink: 0;
        }

        .timeline-content {
            background: #ffffff;
            padding: 20px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            width: 100%;
        }

        /* 8. Technical Standard */
        .standards-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .standard-card {
            background: #ffffff;
            border: 1px solid #FFE3E3;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--card-shadow);
            text-align: center;
        }

        /* 9. Case Center */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .case-card {
            background: #ffffff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-8px);
        }

        .case-info {
            padding: 24px;
        }

        .case-info h3 {
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        /* 10. Evaluation */
        .eval-section {
            background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 100%);
        }

        .eval-box {
            background: #ffffff;
            border: 2px solid var(--primary);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 15px 40px rgba(229, 62, 62, 0.08);
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .score-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            margin-bottom: 30px;
        }

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

        .score-stars {
            color: #FFB300;
            font-size: 2rem;
        }

        .eval-table-wrapper {
            margin-top: 30px;
            overflow-x: auto;
        }

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

        table.eval-table th, table.eval-table td {
            padding: 16px;
            border-bottom: 1px solid #FFE3E3;
        }

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

        /* 11. Matcher */
        .match-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            max-width: 800px;
            margin: 0 auto;
        }

        .match-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 15px;
            margin-bottom: 24px;
        }

        .match-opt {
            border: 1px solid var(--border-color);
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .match-opt.active {
            background-color: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: bold;
        }

        /* 12. Token comparison */
        .token-table-wrapper {
            background: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            overflow-x: auto;
        }

        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .model-badge {
            background: var(--bg-light);
            border: 1px solid #FFE3E3;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text-dark);
        }

        /* 13 & 14. Training */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .training-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        /* 15. Help Center */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .help-item {
            background: #ffffff;
            border: 1px solid #FFE3E3;
            padding: 24px;
            border-radius: 12px;
        }

        /* 16. FAQ Accordion */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid #FFE3E3;
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

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

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text);
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            padding: 18px 24px;
            max-height: 300px;
            border-top-color: #FFE3E3;
        }

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

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

        /* 17. Troubleshooting */
        .trouble-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .trouble-card {
            background: #ffffff;
            border-left: 4px solid var(--accent);
            padding: 20px;
            border-radius: 0 12px 12px 0;
            box-shadow: var(--card-shadow);
        }

        /* 18. Glossary */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .glossary-card {
            background: #ffffff;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid #FFE3E3;
        }

        /* 19. Articles */
        .articles-container {
            margin-bottom: 40px;
        }

        .articles-list-custom {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            list-style: none;
            margin-top: 30px;
        }

        .articles-list-custom li {
            background: #ffffff;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .articles-list-custom a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 12px;
            display: block;
            transition: var(--transition);
        }

        .articles-list-custom a:hover {
            color: var(--primary);
        }

        /* 11. Comments (6 testimonials) */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .comment-card {
            background-color: #ffffff;
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 20px;
        }

        .comment-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: bold;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .comment-meta span {
            font-size: 0.8rem;
            color: var(--text);
        }

        /* 20. Form & Contact */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info-panel {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
        }

        .contact-item-detail {
            display: flex;
            gap: 15px;
            margin-bottom: 24px;
        }

        .contact-icon-box {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .form-panel {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--card-shadow);
            border: 1px solid #FFE3E3;
        }

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

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

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

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
        }

        /* Float QR Button & Sidebar Widget */
        .float-qr {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            background: #ffffff;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border: 2px solid var(--primary);
            border-radius: 12px;
            padding: 12px;
            text-align: center;
            width: 130px;
            transition: var(--transition);
        }

        .float-qr img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .float-qr p {
            font-size: 0.75rem;
            font-weight: 700;
            margin-top: 6px;
            color: var(--primary);
        }

        /* Footer & Friend Links */
        footer {
            background-color: var(--dark);
            color: #E2E8F0;
            padding: 60px 0 30px 0;
        }

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

        .footer-info h3 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1.4rem;
        }

        .footer-links-col h4 {
            color: #ffffff;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }

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

        .footer-links-col ul li {
            margin-bottom: 8px;
        }

        .footer-links-col ul li a {
            color: #A0AEC0;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links-col ul li a:hover {
            color: #ffffff;
        }

        .friend-links-area {
            border-top: 1px solid #4A5568;
            padding-top: 20px;
            margin-top: 20px;
            font-size: 0.85rem;
            color: #A0AEC0;
        }

        .friend-links-area a {
            color: #A0AEC0;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
        }

        .friend-links-area a:hover {
            color: #ffffff;
        }

        .copyright-bar {
            text-align: center;
            border-top: 1px solid #4A5568;
            padding-top: 20px;
            margin-top: 30px;
            font-size: 0.85rem;
            color: #A0AEC0;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            h1.hero-title { font-size: 2.2rem; }
            .about-grid, .tab-pane.active, .network-grid, .training-grid, .contact-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #ffffff;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                padding: 20px;
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            section {
                padding: 60px 0;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
            }
            .float-qr {
                bottom: 20px;
                right: 20px;
                width: 90px;
                padding: 6px;
            }
            .float-qr p {
                font-size: 0.65rem;
            }
        }