:root {
            --primary: #3b82f6;
            --primary-grad: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
            --secondary: #10b981;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --border: #e2e8f0;
            --white: #ffffff;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
        }

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

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

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

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.25;
        }

        .section-title {
            text-align: center;
            font-size: 2.25rem;
            margin-bottom: 1rem;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-subtitle {
            text-align: center;
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 3rem auto;
        }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

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

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

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

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

        .nav-menu a {
            color: var(--dark);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background: var(--primary-grad);
            color: var(--white);
            border: none;
            padding: 8px 18px;
            border-radius: 20px;
            cursor: pointer;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: transform 0.2s, opacity 0.2s;
        }

        .nav-btn:hover {
            transform: translateY(-1px);
            opacity: 0.9;
        }

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

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
        }

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

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

        /* Hero Section (No Image) */
        #hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(185deg, #eef2ff 0%, #fdf2f8 100%);
            text-align: center;
            position: relative;
        }

        #hero h1 {
            font-size: 3rem;
            max-width: 900px;
            margin: 0 auto 1.5rem auto;
            color: var(--dark);
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        #hero p {
            font-size: 1.25rem;
            color: var(--gray);
            max-width: 750px;
            margin: 0 auto 2.5rem auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 3.5rem;
        }

        .btn-large {
            padding: 14px 28px;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .btn-primary {
            background: var(--primary-grad);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
        }

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

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

        /* Stats Component */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 2rem;
        }

        .stat-card {
            background: var(--white);
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            transition: transform 0.3s;
        }

        .stat-card:hover {
            transform: translateY(-5px);
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--gray);
            font-weight: 500;
        }

        /* Platform Grid Component (Services) */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .feature-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 16px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: var(--primary-grad);
            opacity: 0;
            transition: opacity 0.3s;
        }

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

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            font-size: 2rem;
            margin-bottom: 15px;
        }

        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .feature-card p {
            color: var(--gray);
            font-size: 0.95rem;
        }

        /* Model List Badges (Tags Cloud) */
        .tags-wrapper {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border);
            margin-top: 40px;
        }

        .tags-title {
            font-size: 1.2rem;
            margin-bottom: 20px;
            text-align: center;
            font-weight: 600;
        }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-badge {
            background: var(--light);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.2s;
            cursor: default;
        }

        .tag-badge:hover {
            background: var(--primary-grad);
            color: var(--white);
            border-color: transparent;
            transform: scale(1.05);
        }

        /* Image Display Grid (Portfolio / Showcase) */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            align-items: center;
        }

        .showcase-text {
            padding-right: 20px;
        }

        .showcase-text h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
        }

        .showcase-text p {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .showcase-images {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .showcase-img-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            background: var(--light);
        }

        .showcase-img-container img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            transition: transform 0.3s;
        }

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

        /* Process Steps (Timeline) */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .step-item {
            background: var(--white);
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--border);
            text-align: center;
            position: relative;
        }

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

        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* Evaluation Table Component */
        .table-responsive {
            overflow-x: auto;
            background: var(--white);
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            margin-top: 30px;
        }

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

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

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

        .eval-table tr:last-child td {
            border-bottom: none;
        }

        .eval-highlight {
            background-color: rgba(59, 130, 246, 0.05);
            font-weight: 600;
        }

        .star-rating {
            color: #f59e0b;
            font-size: 1.2rem;
        }

        .score-badge {
            background: var(--primary-grad);
            color: var(--white);
            padding: 2px 8px;
            border-radius: 12px;
            font-size: 0.85rem;
            font-weight: bold;
        }

        /* Matching Form & Contact */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .form-card {
            background: var(--white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }

        .form-submit-btn {
            background: var(--primary-grad);
            color: var(--white);
            border: none;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            width: 100%;
            cursor: pointer;
            transition: opacity 0.3s;
        }

        .form-submit-btn:hover {
            opacity: 0.9;
        }

        .info-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 30px;
        }

        .info-item {
            margin-bottom: 25px;
        }

        .info-item h4 {
            font-size: 1rem;
            margin-bottom: 5px;
            color: var(--gray);
        }

        .info-item p {
            font-size: 1.1rem;
            font-weight: 600;
        }

        .qr-box {
            text-align: center;
            padding: 20px;
            background: var(--light);
            border-radius: 8px;
            border: 1px dashed var(--border);
            margin-top: 20px;
        }

        .qr-box img {
            max-width: 130px;
            height: auto;
            margin-bottom: 10px;
        }

        /* Testimonials (6 Comments) */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-top: 20px;
        }

        .testi-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s;
        }

        .testi-card:hover {
            transform: translateY(-3px);
        }

        .testi-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .testi-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-weight: bold;
        }

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

        .testi-info p {
            font-size: 0.8rem;
            color: var(--gray);
        }

        .testi-body {
            font-size: 0.9rem;
            color: var(--dark);
        }

        /* FAQ (Accordion) */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.2s;
        }

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

        .faq-q::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: bold;
            transition: transform 0.3s;
        }

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

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafbfe;
        }

        .faq-a-inner {
            padding: 20px 24px;
            border-top: 1px solid var(--border);
            font-size: 0.95rem;
            color: var(--gray);
        }

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

        .enc-card {
            background: var(--white);
            border: 1px solid var(--border);
            padding: 20px;
            border-radius: 8px;
            transition: border-color 0.3s;
        }

        .enc-card:hover {
            border-color: var(--primary);
        }

        .enc-card h4 {
            color: var(--primary);
            margin-bottom: 8px;
        }

        .enc-card p {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* Article List & Links */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .news-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .news-content {
            padding: 20px;
        }

        .news-meta {
            font-size: 0.8rem;
            color: var(--gray);
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 1.1rem;
            margin-bottom: 12px;
            display: block;
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
        }

        .news-title:hover {
            color: var(--primary);
        }

        /* Footer & Links */
        footer {
            background-color: var(--dark);
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: var(--white);
            margin-bottom: 15px;
        }

        .footer-brand p {
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-links h4 {
            color: var(--white);
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s;
        }

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

        .friend-links {
            border-top: 1px solid #334155;
            padding-top: 25px;
            margin-bottom: 25px;
        }

        .friend-links-title {
            color: var(--white);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

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

        .friend-links-list a {
            color: #94a3b8;
            text-decoration: none;
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* Float Widget */
        .float-widget {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--white);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.2rem;
            text-decoration: none;
            color: var(--dark);
            position: relative;
        }

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

        .float-btn-qr {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: var(--white);
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            display: none;
            text-align: center;
        }

        .float-btn-qr img {
            width: 100px;
            height: 100px;
        }

        .float-btn:hover .float-btn-qr {
            display: block;
        }

        /* Mobile Responsive */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-top: 1px solid var(--border);
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .showcase-grid {
                grid-template-columns: 1fr;
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .contact-grid {
                grid-template-columns: 1fr;
            }

            .testimonials-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            #hero h1 {
                font-size: 2.2rem;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .process-steps {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 1.75rem;
            }
        }