:root {
            --bg-main: #0a0616;
            --bg-card: #130f26;
            --bg-card-hover: #1e183a;
            --primary: #ff007f;
            --secondary: #8a2be2;
            --cyan: #00f0ff;
            --text-main: #ffffff;
            --text-muted: #a5a1be;
            --border: rgba(255, 0, 127, 0.25);
            --border-hover: rgba(0, 240, 255, 0.5);
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }

        /* Cyberpunk Neon Glow Utilities */
        .text-glow {
            text-shadow: 0 0 10px var(--primary), 0 0 20px var(--secondary);
        }

        .border-glow {
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.15);
            border: 1px solid var(--border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
            letter-spacing: 0.5px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 0, 127, 0.6);
        }

        .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover {
            background: rgba(255, 0, 127, 0.1);
            border-color: var(--cyan);
            color: var(--cyan);
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 6, 22, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .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;
        }

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

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

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

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-main);
            transition: var(--transition);
        }

        /* Hero Section (No Images) */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(138, 43, 226, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(255, 0, 127, 0.1) 0%, transparent 50%);
            text-align: center;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--cyan) 70%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 35px;
        }

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 60px;
        }

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

        .metric-card {
            background: var(--bg-card);
            border-radius: 12px;
            padding: 25px 20px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .metric-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--cyan);
            margin-bottom: 5px;
        }

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

        /* Section Header */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-tag {
            color: var(--primary);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 10px;
            display: block;
            font-weight: 700;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .section-desc {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Grid layouts */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

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

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

        /* Cards Style */
        .interactive-card {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .interactive-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-5px);
        }

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

        .card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

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

        /* Model Badges Grid */
        .model-list-wrapper {
            background: rgba(20, 15, 38, 0.6);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
        }

        .model-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .model-badge {
            background: rgba(255, 255, 255, 0.05);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }

        .model-badge:hover {
            background: var(--primary);
            border-color: var(--primary);
            transform: scale(1.05);
        }

        /* Process Steps */
        .steps-container {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 40px;
        }

        .steps-container::before {
            content: '';
            position: absolute;
            top: 35px;
            left: 5%;
            right: 5%;
            height: 2px;
            background: rgba(255, 255, 255, 0.1);
            z-index: 1;
        }

        .step-item {
            width: 18%;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 20px;
            color: var(--cyan);
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.3);
        }

        .step-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Evaluation Table */
        .table-responsive {
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--border);
        }

        .evaluation-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: var(--bg-card);
        }

        .evaluation-table th, .evaluation-table td {
            padding: 18px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .evaluation-table th {
            background: rgba(138, 43, 226, 0.2);
            color: #fff;
            font-weight: 600;
        }

        .evaluation-table tr:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .score-highlight {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.2rem;
        }

        /* Showcase Grid */
        .showcase-item {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .showcase-img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .showcase-info {
            padding: 15px;
            background: var(--bg-card);
        }

        /* Testimonials */
        .testimonial-card {
            background: var(--bg-card);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border);
            position: relative;
        }

        .testimonial-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        /* Form styling */
        .form-wrapper {
            background: var(--bg-card);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border);
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

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

        .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 14px;
            border-radius: 8px;
            color: #fff;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.3);
        }

        /* FAQ Accordion */
        .faq-item {
            background: var(--bg-card);
            border-radius: 8px;
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
        }

        .faq-header {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            transition: var(--transition);
        }

        .faq-header:hover {
            background: var(--bg-card-hover);
        }

        .faq-question {
            font-weight: 600;
        }

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

        .faq-body {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-body {
            padding: 0 24px 20px;
            max-height: 500px;
        }

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

        /* Articles list */
        .article-card {
            background: var(--bg-card);
            border-radius: 12px;
            padding: 20px;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
        }

        .article-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .article-link {
            color: var(--cyan);
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 15px;
        }

        /* Footer & Links */
        footer {
            background: #06030e;
            padding: 60px 0 30px;
            border-top: 2px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 45px;
        }

        .footer-logo-desc {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-title {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--cyan);
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .contact-info-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .friend-links-box {
            padding: 25px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            margin-bottom: 30px;
        }

        .friend-links-title {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

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

        .friend-links-container a {
            color: var(--text-muted);
            font-size: 0.85rem;
            background: rgba(255, 255, 255, 0.03);
            padding: 5px 12px;
            border-radius: 4px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .friend-links-container a:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Sticky Service Button */
        .sticky-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sticky-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
            cursor: pointer;
            transition: var(--transition);
        }

        .sticky-btn:hover {
            transform: scale(1.1);
            background: var(--primary);
        }

        .sticky-qrcode-panel {
            position: absolute;
            bottom: 60px;
            right: 0;
            width: 200px;
            background: var(--bg-card);
            border: 1px solid var(--primary);
            border-radius: 8px;
            padding: 15px;
            text-align: center;
            display: none;
            box-shadow: 0 0 20px rgba(0,0,0,0.8);
        }

        .sticky-qrcode-panel img {
            width: 100%;
            margin-bottom: 10px;
        }

        .sticky-qrcode-panel span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Tags Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-pill {
            background: rgba(255, 0, 127, 0.1);
            border: 1px solid rgba(255, 0, 127, 0.2);
            color: var(--text-main);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
        }

        /* Time line style */
        .timeline {
            position: relative;
            padding-left: 30px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 5px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--primary);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--cyan);
            border: 2px solid var(--bg-main);
        }

        .timeline-date {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 5px;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .grid-4, .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-h1 {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--bg-main);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .grid-2, .grid-3, .grid-4 {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-container {
                flex-direction: column;
                gap: 30px;
            }
            .steps-container::before {
                display: none;
            }
            .step-item {
                width: 100%;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
            .hero-h1 {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }
        }