/* Global Resets & Typography */
    :root {
      --primary-color: #1d4ed8;
      --primary-hover: #1e40af;
      --accent-color: #0284c7;
      --accent-light: #e0f2fe;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
      --hover-shadow: 0 12px 30px -4px rgba(29, 78, 216, 0.15);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

    * {
      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-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-light);
    }

    /* Standard Layout Container */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.25rem;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.75rem 1.75rem;
      font-size: 1rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.3s ease;
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(29, 78, 216, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(29, 78, 216, 0.4);
    }

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

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

    /* Section Styling */
    .section-padding {
      padding: 5rem 0;
    }

    .section-bg-white {
      background-color: var(--bg-white);
    }

    .section-bg-slate {
      background-color: var(--bg-light);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 3.5rem auto;
    }

    .section-badge {
      display: inline-block;
      padding: 0.35rem 1rem;
      background-color: var(--accent-light);
      color: var(--primary-color);
      font-size: 0.875rem;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 1rem;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
    }

    /* Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .ai-page-home-link {
      font-weight: 600;
      color: var(--text-main);
      padding: 4px 8px;
    }

    /* Mandatory gap: 0 rule */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links li a {
      padding: 0.5rem 0.75rem;
      color: var(--text-muted);
      font-size: 0.925rem;
      font-weight: 500;
      border-radius: var(--radius-sm);
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

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

    /* HERO SECTION (NO IMAGES AT ALL) */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #eff6ff 0%, #ffffff 50%, #f0f9ff 100%);
      padding: 5.5rem 0 4.5rem 0;
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-glow {
      position: absolute;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
      top: -100px;
      right: -100px;
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #dbeafe;
      border: 1px solid #bfdbfe;
      color: var(--primary-color);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 1.25rem;
      line-height: 1.25;
    }

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 2.25rem;
      line-height: 1.6;
    }

    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1.25rem;
      margin-bottom: 3.5rem;
      flex-wrap: wrap;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-top: 2rem;
    }

    .stat-card {
      background: #ffffff;
      padding: 1.5rem 1rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      text-align: center;
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 0.25rem;
    }

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

    /* General Grid Systems */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

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

    /* Cards & Features */
    .feature-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 2rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--hover-shadow);
      border-color: #bfdbfe;
    }

    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--accent-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: bold;
      margin-bottom: 1.25rem;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.975rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* Tags Cloud */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 1.5rem;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.875rem;
      color: var(--text-main);
      font-weight: 500;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }

    .model-tag.highlight {
      background: var(--primary-color);
      color: #ffffff;
      border-color: var(--primary-color);
    }

    /* Process Timeline */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }

    .process-step {
      background: var(--bg-white);
      padding: 1.75rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      font-size: 2.25rem;
      font-weight: 900;
      color: #cbd5e1;
      margin-bottom: 0.5rem;
      line-height: 1;
    }

    .process-step h4 {
      font-size: 1.1rem;
      margin-bottom: 0.5rem;
    }

    .process-step p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Comparison Table & Rating */
    .rating-banner {
      background: linear-gradient(90deg, #1e3a8a 0%, #1d4ed8 100%);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 2rem;
      margin-bottom: 2rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1.5rem;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }

    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: #fde047;
      line-height: 1;
    }

    .rating-details h3 {
      font-size: 1.5rem;
      color: #ffffff;
    }

    .rating-stars {
      color: #fde047;
      font-size: 1.25rem;
      margin-top: 4px;
    }

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .comp-table th, .comp-table td {
      padding: 1.1rem 1.5rem;
      border-bottom: 1px solid var(--border-color);
    }

    .comp-table th {
      background-color: #f1f5f9;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .comp-table .highlight-cell {
      background-color: #eff6ff;
      font-weight: 700;
      color: var(--primary-color);
    }

    /* Media Library Display */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
      margin-bottom: 2rem;
    }

    .media-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .media-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }

    .media-info {
      padding: 1.25rem;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

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

    .faq-question {
      width: 100%;
      padding: 1.25rem 1.5rem;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.5rem;
      color: var(--primary-color);
      transition: transform 0.2s;
    }

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

    .faq-answer {
      padding: 0 1.5rem 1.25rem 1.5rem;
      color: var(--text-muted);
      font-size: 0.95rem;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* Testimonials */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .review-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 1rem;
    }

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

    .author-info h4 {
      font-size: 1rem;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Form Section */
    .form-container-box {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 2.5rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.25rem;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

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

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
    }

    /* Footer & Friendship Links */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 4rem 0 2rem 0;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr repeat(3, 1fr);
      gap: 2.5rem;
      margin-bottom: 3rem;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 1.25rem;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.7;
    }

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

    .footer-links li {
      margin-bottom: 0.6rem;
    }

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

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

    .friendship-box {
      border-top: 1px solid #1e293b;
      padding-top: 2rem;
      margin-top: 2rem;
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 1.25rem;
      margin-top: 0.75rem;
    }

    .friendship-links a {
      color: #64748b;
      font-size: 0.875rem;
    }

    .friendship-links a:hover {
      color: #38bdf8;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      margin-top: 2rem;
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.875rem;
      color: #64748b;
    }

    /* Float Widget */
    .floating-widget {
      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);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      cursor: pointer;
      font-weight: bold;
      font-size: 0.85rem;
      text-decoration: none;
    }

    /* Article List Styling */
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .article-item {
      background: var(--bg-white);
      padding: 1.25rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-item a {
      font-weight: 600;
      color: var(--text-main);
    }

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

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

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .grid-3, .grid-2, .reviews-grid, .media-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }