:root {
            --primary: #00a896;
            --primary-dark: #028090;
            --primary-light: #e6f4f8;
            --accent: #05668d;
            --gradient-start: #ebf6f7;
            --gradient-end: #d8eff2;
            --bg-main: #f8fafb;
            --card-bg: #ffffff;
            --text-dark: #1a2b3c;
            --text-body: #3a4d5f;
            --text-muted: #708294;
            --border-color: #dbe7ec;
            --shadow-sm: 0 2px 8px rgba(0, 168, 150, 0.06);
            --shadow-md: 0 6px 18px rgba(0, 168, 150, 0.1);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --transition: all 0.3s ease;
        }

        * {
            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;
            background-color: var(--bg-main);
            color: var(--text-body);
            line-height: 1.6;
        }

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

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

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

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

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

        .ai-page-logo {
            height: 42px;
            width: auto;
            display: block;
        }

        /* Required Specific CSS Rule */
        .nav-links {
            display: flex;
            gap: 0;
            align-items: center;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            border-radius: var(--radius-sm);
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 50px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 12px rgba(0, 168, 150, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(0, 168, 150, 0.35);
        }

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

        .btn-outline:hover {
            background-color: var(--primary-light);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-dark);
            cursor: pointer;
        }

        /* Section Layout Common Styles */
        section {
            padding: 70px 0;
            position: relative;
        }

        .section-bg-light {
            background-color: #ffffff;
        }

        .section-bg-gradient {
            background: linear-gradient(180deg, var(--gradient-start) 0%, var(--bg-main) 100%);
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-dark);
            background-color: var(--primary-light);
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 32px;
            color: var(--text-dark);
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
        }

        /* HERO SECTION - Strictly NO IMAGES */
        .hero-section {
            padding: 80px 0 60px 0;
            background: linear-gradient(135deg, #eef7f8 0%, #e0f2f5 50%, #f4fafb 100%);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .hero-content {
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #ffffff;
            border: 1px solid rgba(0, 168, 150, 0.3);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 14px;
            color: var(--primary-dark);
            margin-bottom: 24px;
            box-shadow: var(--shadow-sm);
        }

        .hero-badge span {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--primary);
            border-radius: 50%;
        }

        .hero-title {
            font-size: 38px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 20px;
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-body);
            margin-bottom: 36px;
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .hero-highlights {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 30px;
        }

        .highlight-item {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(5px);
            padding: 18px 12px;
            border-radius: var(--radius-md);
            border: 1px solid #d4e8ed;
            text-align: center;
        }

        .highlight-number {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .highlight-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Services Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .card {
            background-color: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .card-icon-box {
            width: 48px;
            height: 48px;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 16px;
        }

        .card-title {
            font-size: 18px;
            color: var(--text-dark);
            font-weight: 700;
            margin-bottom: 10px;
        }

        .card-desc {
            font-size: 14px;
            color: var(--text-body);
            flex-grow: 1;
            margin-bottom: 16px;
        }

        .card-tag {
            font-size: 12px;
            color: var(--primary-dark);
            background: var(--primary-light);
            padding: 2px 8px;
            border-radius: 4px;
            align-self: flex-start;
        }

        /* Timeline Process */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--card-bg);
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            position: relative;
            text-align: center;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 16px auto;
        }

        /* Comparison Section */
        .rating-box {
            background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
            border: 2px solid var(--primary);
            border-radius: var(--radius-lg);
            padding: 30px;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
            text-align: center;
        }

        .rating-score {
            font-size: 48px;
            font-weight: 900;
            color: var(--primary-dark);
        }

        .rating-stars {
            color: #f5a623;
            font-size: 24px;
            margin-bottom: 4px;
        }

        .comp-table-wrapper {
            overflow-x: auto;
        }

        .comp-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .comp-table th, .comp-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

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

        .comp-table tr.highlight-row {
            background-color: rgba(0, 168, 150, 0.04);
            font-weight: 600;
        }

        /* Case Studies Grid */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .case-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #eef2f5;
        }

        .ai-page-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .case-content {
            padding: 20px;
        }

        /* Supported Models Cloud */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }

        .tag-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary-dark);
            background-color: var(--primary-light);
        }

        /* FAQ Accordion */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-title {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            background: #ffffff;
        }

        .faq-title::after {
            content: '+';
            font-size: 20px;
            color: var(--primary-dark);
        }

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

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-body);
            font-size: 14px;
        }

        .faq-item.active .faq-content {
            padding: 0 24px 20px 24px;
            max-height: 300px;
        }

        /* Testimonials Grid */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }

        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

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

        .user-meta h4 {
            font-size: 15px;
            color: var(--text-dark);
        }

        .user-meta p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Contact & Form */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .contact-info {
            background: #ffffff;
            padding: 30px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .info-item {
            margin-bottom: 20px;
        }

        .info-item label {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }

        .info-item p {
            font-size: 16px;
            color: var(--text-dark);
            font-weight: 600;
        }

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

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 168, 150, 0.1);
        }

        /* Footer */
        footer {
            background-color: #142332;
            color: #d1dde8;
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

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

        .footer-col h3 {
            color: #ffffff;
            font-size: 16px;
            margin-bottom: 18px;
        }

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

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

        .footer-links a {
            color: #9ab0c4;
        }

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

        .qr-box {
            background: white;
            padding: 8px;
            display: inline-block;
            border-radius: var(--radius-sm);
            margin-top: 10px;
        }

        .qr-box img {
            width: 110px;
            height: 110px;
            display: block;
        }

        .friendship-links {
            border-top: 1px solid #24374a;
            padding-top: 20px;
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 13px;
        }

        .friendship-links a {
            color: #7f99b2;
        }

        .copyright-bar {
            border-top: 1px solid #24374a;
            padding-top: 20px;
            margin-top: 30px;
            text-align: center;
            color: #6a8298;
            font-size: 13px;
        }

        /* Articles list */
        .articles-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 12px;
            margin-top: 20px;
        }

        .articles-list li a {
            display: block;
            padding: 10px 14px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-dark);
            text-overflow: ellipsis;
            white-space: nowrap;
            overflow: hidden;
        }

        .articles-list li a:hover {
            border-color: var(--primary);
            color: var(--primary-dark);
        }

        /* Floating Widgets */
        .float-kefu {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 10px;
            box-shadow: var(--shadow-md);
            text-align: center;
        }

        .float-kefu img {
            width: 90px;
            height: 90px;
            display: block;
            margin-bottom: 4px;
        }

        .float-kefu span {
            font-size: 11px;
            color: var(--text-dark);
            font-weight: 600;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .hero-title { font-size: 30px; }
            .hero-highlights { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .contact-container { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px 0;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .nav-links.show { display: flex; }
            .mobile-menu-btn { display: block; }
            .hero-title { font-size: 24px; }
            .hero-highlights { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .rating-box { flex-direction: column; }
        }