/* Base Styling & CSS Reset */
        :root {
            --primary: #7C3AED;
            --primary-hover: #6D28D9;
            --primary-light: #F3E8FF;
            --purple-accent: #C084FC;
            --purple-dark: #4C1D95;
            --pink-accent: #EC4899;
            --bg-main: #FBFBFE;
            --bg-card: #FFFFFF;
            --text-main: #1F2937;
            --text-muted: #4B5563;
            --border-color: #E9D5FF;
            --shadow: 0 10px 25px -5px rgba(124, 58, 237, 0.08), 0 8px 10px -6px rgba(124, 58, 237, 0.05);
            --shadow-hover: 0 20px 30px -10px rgba(124, 58, 237, 0.18);
            --radius-lg: 16px;
            --radius-md: 10px;
            --max-width: 1200px;
        }

        * {
            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-main);
            line-height: 1.6;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.2s ease;
        }

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

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

        /* Nav Section */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(124, 58, 237, 0.05);
        }

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

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

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

        /* MANDATORY gap: 0 for .nav-links */
        .nav-links {
            display: flex;
            gap: 0;
            align-items: center;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 6px;
        }

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

        .nav-cta {
            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: 30px;
            cursor: pointer;
            border: none;
            transition: all 0.25s ease;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #9333EA);
            color: #ffffff !important;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.5);
        }

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

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

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

        /* Hero Section - STRICTLY NO IMAGES */
        .hero-section {
            padding: 80px 0 60px 0;
            background: radial-gradient(circle at 50% 20%, rgba(192, 132, 252, 0.15), transparent 70%),
                        linear-gradient(180deg, #F5F3FF 0%, #FBFBFE 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: var(--primary-light);
            color: var(--primary-hover);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--purple-dark);
            background: linear-gradient(135deg, #4C1D95, #7C3AED, #EC4899);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 36px auto;
            line-height: 1.7;
        }

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

        .hero-metrics {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: #FFFFFF;
            padding: 30px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
        }

        .metric-card h3 {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 6px;
            font-weight: 800;
        }

        .metric-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Section Layouts */
        .section {
            padding: 80px 0;
            position: relative;
        }

        .section-alt {
            background: #F5F3FF;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px auto;
        }

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

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

        /* Cards Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--purple-accent);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 18px;
        }

        .card-title {
            font-size: 20px;
            color: var(--purple-dark);
            margin-bottom: 12px;
            font-weight: 700;
        }

        .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

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

        .tag-item {
            padding: 8px 16px;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--purple-dark);
            box-shadow: 0 2px 5px rgba(124, 58, 237, 0.05);
            transition: all 0.2s ease;
        }

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

        /* Comparison Table Section */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
        }

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

        .compare-table th,
        .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 15px;
        }

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

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

        .compare-highlight {
            background: rgba(243, 232, 255, 0.4);
            font-weight: 600;
            color: var(--primary-hover);
        }

        .badge-star {
            display: inline-block;
            background: #FEF3C7;
            color: #D97706;
            padding: 4px 12px;
            border-radius: 12px;
            font-weight: bold;
            font-size: 14px;
        }

        /* Cases Showcase */
        .case-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

        .case-img-wrap {
            width: 100%;
            overflow: hidden;
            background: #E5E7EB;
        }

        .case-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
            transition: transform 0.3s ease;
        }

        .case-card:hover img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 20px;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 2px 6px rgba(0,0,0,0.02);
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--purple-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question::after {
            content: "+";
            font-size: 20px;
            color: var(--primary);
            transition: transform 0.2s;
        }

        .faq-item.active .faq-question::after {
            content: "−";
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            transition: all 0.3s ease;
            background: #FAF8FF;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 16px 24px 20px 24px;
            border-top: 1px dashed var(--border-color);
        }

        /* Contact & Form */
        .contact-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

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

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--purple-dark);
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 14px;
            outline: none;
            transition: border 0.2s;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        .contact-info-list {
            list-style: none;
            margin-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-info-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
        }

        .qr-code-box {
            margin-top: 20px;
            padding: 16px;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            display: inline-block;
            text-align: center;
        }

        .qr-code-box img {
            width: 130px;
            height: 130px;
            border-radius: 8px;
        }

        /* Footer */
        .site-footer {
            background: #2D1552;
            color: #E9D5FF;
            padding: 60px 0 30px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-col p, .footer-col li {
            font-size: 14px;
            color: #C084FC;
            margin-bottom: 10px;
            list-style: none;
        }

        .footer-col a {
            color: #E9D5FF;
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .friendship-links a {
            background: rgba(255,255,255,0.08);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(233, 213, 255, 0.15);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: #A78BFA;
        }

        /* Floating Widget */
        .float-service {
            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(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: transform 0.2s;
            font-size: 20px;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        /* Article Links List */
        .article-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .article-item {
            background: #FFFFFF;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .grid-3, .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-metrics {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-box {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links li a {
                padding: 12px;
            }
            .hero-title {
                font-size: 28px;
            }
            .grid-2, .grid-3, .grid-4 {
                grid-template-columns: 1fr;
            }
            .hero-metrics {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }