:root {
      --primary: #4f46e5;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
      --accent-pink: #ec4899;
      --accent-cyan: #06b6d4;
      --accent-yellow: #f59e0b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(79,70,229,0.08);
      --shadow-hover: 0 20px 35px -10px rgba(124,58,237,0.18);
      --radius: 16px;
    }

    * {
      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;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%);
    }

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

    /* Header & Navigation */
    .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);
    }

    .header-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 15px;
      padding: 8px 14px;
      border-radius: 8px;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

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

    .btn-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 999px;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(124, 58, 237, 0.45);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }

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

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

    /* Hero Section - NO IMAGES ALLOWED */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
      background: radial-gradient(circle at 50% 20%, rgba(236, 72, 153, 0.12) 0%, rgba(79, 70, 229, 0.05) 50%, transparent 80%);
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(79, 70, 229, 0.1);
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: 999px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--text-main);
    }

    .hero-title span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-buttons .btn-btn {
      padding: 14px 32px;
      font-size: 16px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

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

    .metric-number {
      font-size: 32px;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

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

    /* Shared Section Layouts */
    .section-block {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: linear-gradient(90deg, rgba(236, 72, 153, 0.15), rgba(79, 70, 229, 0.15));
      color: var(--accent-pink);
      font-size: 13px;
      font-weight: 700;
      border-radius: 6px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Grid & Cards */
    .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;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(124, 58, 237, 0.3);
    }

    .feature-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(236,72,153,0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 18px;
      color: var(--primary);
    }

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

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Models Cloud Pill */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

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

    /* Comparison Table */
    .comparison-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .rating-header {
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(236, 72, 153, 0.08));
      padding: 24px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }

    .stars {
      color: var(--accent-yellow);
      font-size: 24px;
      letter-spacing: 4px;
      margin-bottom: 6px;
    }

    .score-badge {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
    }

    .score-badge strong {
      color: var(--primary);
      font-size: 28px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .comp-table th, .comp-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .comp-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .comp-table tr:hover {
      background: rgba(79, 70, 229, 0.02);
    }

    .highlight-col {
      background: rgba(79, 70, 229, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

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

    .step-item {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    /* Gallery Grid */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .gallery-item {
      border-radius: var(--radius);
      overflow: hidden;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .gallery-item:hover .ai-page-image {
      transform: scale(1.04);
    }

    .gallery-content {
      padding: 16px 20px;
    }

    .gallery-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
    }

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

    /* Review Cards */
    .review-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .user-name {
      font-weight: 700;
      font-size: 15px;
    }

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

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

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

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 20px;
    }

    .faq-icon {
      transition: transform 0.3s ease;
      font-size: 18px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

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

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

    .form-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      background: #f8fafc;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      background: #ffffff;
    }

    .form-textarea {
      resize: vertical;
      min-height: 120px;
    }

    /* Contact & QR Side Box */
    .contact-card-box {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-card-box h3 {
      font-size: 24px;
      margin-bottom: 16px;
    }

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 15px;
    }

    .qr-container {
      margin-top: 24px;
      background: #ffffff;
      padding: 16px;
      border-radius: 12px;
      display: inline-block;
      width: 160px;
      text-align: center;
    }

    .qr-container img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

    .qr-label {
      font-size: 12px;
      color: var(--text-main);
      margin-top: 8px;
      font-weight: 600;
    }

    /* Articles Showcase */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .article-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

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

    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      margin-top: 14px;
    }

    .footer-heading {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s ease;
    }

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

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links-box a {
      color: #cbd5e1;
      text-decoration: none;
      font-size: 13px;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 6px;
      transition: background 0.2s ease;
    }

    .friend-links-box a:hover {
      background: var(--primary);
      color: #ffffff;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      font-size: 13px;
    }

    /* Floating Widget */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(0,0,0,0.2);
      cursor: pointer;
      text-decoration: none;
      font-size: 20px;
      transition: transform 0.2s ease;
    }

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

    /* Responsive Styles */
    @media (max-width: 992px) {
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
      .gallery-grid { grid-template-columns: repeat(2, 1fr); }
      .articles-grid { grid-template-columns: repeat(1, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 28px; }
      .hero-desc { font-size: 15px; }
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active { display: flex; }
      .hero-metrics { grid-template-columns: 1fr; }
      .grid-3, .grid-4, .steps-wrapper, .gallery-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group.full { grid-column: span 1; }
      .footer-grid { grid-template-columns: 1fr; }
    }