/* Base Variables & Reset */
        :root {
            --primary: #8b5cf6;
            --primary-light: #a855f7;
            --primary-dark: #6d28d9;
            --secondary: #ec4899;
            --dark: #1e1b4b;
            --light: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border: #e2e8f0;
            --shadow: 0 10px 30px -10px rgba(139, 92, 246, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #ffffff;
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

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

        /* Typography */
        .section-title {
            text-align: center;
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 800;
            position: relative;
        }

        .section-title span {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 50px auto;
            font-size: 1.1rem;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
        }

        .btn-secondary {
            background-color: #ffffff;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

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

        /* Header Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

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

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

        .logo-text {
            font-weight: 800;
            font-size: 1.3rem;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            font-weight: 500;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

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

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

        /* Hero Section (No Images allowed) */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(168, 85, 247, 0.08) 0%, rgba(255, 255, 255, 0) 50%),
                        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.08) 0%, rgba(255, 255, 255, 0) 50%);
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background-color: rgba(139, 92, 246, 0.08);
            border: 1px solid rgba(139, 92, 246, 0.2);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            max-width: 900px;
            margin: 0 auto 20px auto;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 650px;
            margin: 0 auto 35px auto;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stats-card {
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 25px 20px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .stats-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-light);
        }

        .stats-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stats-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* About Section */
        .about-wrap {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .about-text {
            color: var(--text-muted);
            margin-bottom: 25px;
            font-size: 1rem;
            line-height: 1.8;
        }

        .about-features {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .about-features li {
            position: relative;
            padding-left: 25px;
            font-weight: 500;
            color: var(--text-main);
        }

        .about-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        /* Cards Design (Common Grid) */
        .card-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .card-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .card {
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: rgba(139, 92, 246, 0.3);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            background: rgba(139, 92, 246, 0.1);
            color: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

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

        /* Model Badge Cloud */
        .badge-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 1000px;
            margin: 0 auto;
        }

        .badge-item {
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            cursor: default;
        }

        .badge-item:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #ffffff;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* Compare Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background: #ffffff;
            text-align: left;
            min-width: 800px;
        }

        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border);
        }

        th {
            background-color: var(--light);
            color: var(--dark);
            font-weight: 700;
        }

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

        .highlight-col {
            background-color: rgba(139, 92, 246, 0.03);
            font-weight: 600;
        }

        .badge-rating {
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
            color: white;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
        }

        /* Process Steps */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            position: relative;
            background: var(--light);
            padding: 30px 20px;
            border-radius: 16px;
            text-align: center;
        }

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

        /* FAQ Accordion */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            background-color: #ffffff;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--dark);
            user-select: none;
        }

        .faq-icon {
            transition: transform 0.3s;
        }

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

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

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(139, 92, 246, 0.08);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

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

        .review-card {
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

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

        .avatar-placeholder {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }

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

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

        .review-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Form Design */
        .form-wrap {
            max-width: 600px;
            margin: 0 auto;
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--shadow);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
        }

        /* Footer & Links */
        footer {
            background-color: var(--dark);
            color: #ffffff;
            padding: 80px 0 20px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 50px;
            margin-bottom: 50px;
        }

        .footer-col h3 {
            color: #ffffff;
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col p {
            color: #94a3b8;
            font-size: 0.9rem;
            line-height: 1.8;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 5px;
        }

        .contact-info-list {
            list-style: none;
        }

        .contact-info-list li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: #94a3b8;
        }

        /* Friends Link Cloud */
        .friendship-links {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 25px 0;
            text-align: center;
        }

        .friendship-links a {
            color: #94a3b8;
            margin: 0 10px;
            font-size: 0.85rem;
            display: inline-block;
        }

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

        .copyright-bar {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            color: #64748b;
            font-size: 0.85rem;
        }

        /* Floating Sidebar */
        .floating-sidebar {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: #ffffff;
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary);
            color: #ffffff;
        }

        .float-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            width: 150px;
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 10px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

        .float-btn:hover .float-qr {
            opacity: 1;
            visibility: visible;
        }

        .float-qr img {
            width: 100%;
            height: auto;
        }

        /* Image Handling */
        .image-container {
            width: 100%;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

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

        /* Article List (SEO Section) */
        .article-section {
            background-color: var(--light);
        }
        
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
        }

        .article-card {
            background: #ffffff;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

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

        .article-card a {
            color: var(--primary);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            margin-top: 10px;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .stats-grid, .card-grid-3, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4, .step-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-wrap {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .stats-grid, .card-grid-3, .reviews-grid, .card-grid-4, .step-timeline, .article-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }