/* CSS Standard Reset & Colors */
    :root {
      --primary: #7c3aed;
      --primary-dark: #6d28d9;
      --primary-light: #f3e8ff;
      --primary-accent: #a855f7;
      --pink-accent: #ec4899;
      --text-main: #1e1b4b;
      --text-muted: #475569;
      --bg-main: #fcfaff;
      --bg-card: #ffffff;
      --border-color: #ede9fe;
      --shadow-sm: 0 4px 6px -1px rgba(124, 58, 237, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(124, 58, 237, 0.08), 0 8px 10px -6px rgba(124, 58, 237, 0.04);
      --shadow-lg: 0 20px 35px -10px rgba(124, 58, 237, 0.12);
      --radius: 12px;
      --max-width: 1240px;
    }

    * {
      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;
    }

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

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

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

    /* Layout Alignment Rules */
    header, main, footer {
      width: 100%;
    }

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

    .section-alt {
      background: linear-gradient(180deg, #f8f5ff 0%, #ffffff 100%);
    }

    /* 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);
      box-shadow: 0 2px 10px rgba(124, 58, 237, 0.03);
    }

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

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

    .ai-page-logo {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary-dark), var(--primary-accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* SPECIFIC REQUIREMENT: .nav-links gap set to 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      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);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-accent));
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--primary-dark) !important;
      border-color: var(--border-color);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero Section - STRICT NO IMAGES */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 0%, #f3e8ff 0%, #faf5ff 45%, #ffffff 80%);
      position: relative;
      overflow: hidden;
    }

    .hero-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 50px;
      background: rgba(124, 58, 237, 0.08);
      border: 1px solid rgba(124, 58, 237, 0.2);
      color: var(--primary-dark);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.8rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-desc {
      max-width: 820px;
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      gap: 16px;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-btn-main {
      padding: 14px 36px;
      font-size: 1.1rem;
      border-radius: 10px;
    }

    /* Hero Metrics Cards - Pure CSS layout, zero image */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 20px;
    }

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

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

    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section Component Styles */
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-subtitle {
      color: var(--primary);
      font-weight: 700;
      text-transform: uppercase;
      font-size: 0.85rem;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
    }

    /* Grid Layouts */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; align-items: center; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

    /* Cards Styling */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      border-color: rgba(124, 58, 237, 0.3);
      transform: translateY(-4px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .card-text {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* Image Container formatting */
    .img-box {
      width: 100%;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

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

    /* Tag Cloud for Supported Models */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .tag-item {
      background: #f3e8ff;
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 5px 14px;
      border-radius: 20px;
      border: 1px solid rgba(124, 58, 237, 0.15);
    }

    /* Comparison Table Styling */
    .review-score-banner {
      background: linear-gradient(135deg, #7c3aed, #a855f7);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }

    .score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-num {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-stars {
      font-size: 1.4rem;
      color: #fbbf24;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

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

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

    .highlight-cell {
      background: rgba(124, 58, 237, 0.03);
      font-weight: 600;
      color: var(--primary-dark);
    }

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

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #faf8fc;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* User Reviews */
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid var(--border-color);
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .user-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
    }

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

    /* Form Styling */
    .form-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

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

    .form-label {
      display: block;
      font-weight: 600;
      font-size: 0.9rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      outline: none;
      transition: border-color 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 Details Sidebar */
    .contact-info-card {
      background: linear-gradient(135deg, #1e1b4b, #312e81);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 36px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-item {
      margin-bottom: 20px;
    }

    .contact-info-item strong {
      display: block;
      color: var(--primary-light);
      font-size: 0.85rem;
      text-transform: uppercase;
      margin-bottom: 4px;
    }

    .qr-code-box {
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      display: inline-block;
      max-width: 140px;
      margin-top: 10px;
    }

    /* Links & Footer */
    .articles-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .articles-list li a {
      display: block;
      padding: 12px 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.9rem;
    }

    .articles-list li a:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateX(4px);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .friend-links a {
      font-size: 0.85rem;
      color: var(--text-muted);
      background: #f1f5f9;
      padding: 4px 12px;
      border-radius: 4px;
    }

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

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

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-col ul li {
      margin-bottom: 8px;
    }

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

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* Floating Widget */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 20px;
      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 16px rgba(124, 58, 237, 0.4);
      cursor: pointer;
      font-weight: 700;
      font-size: 0.85rem;
      transition: transform 0.2s;
    }

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

    /* Responsive Adjustments */
    @media (max-width: 1024px) {
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .footer-content { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .grid-2, .grid-3 { grid-template-columns: 1fr; }
      .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.show { display: flex; }
      .nav-links li { width: 100%; text-align: center; }
      .articles-list { grid-template-columns: 1fr; }
      .footer-content { grid-template-columns: 1fr; }
      .review-score-banner { flex-direction: column; text-align: center; gap: 16px; }
    }