:root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --primary-light: #ccfbf1;
      --accent: #0284c7;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --bg-cyan-soft: #f0fdfa;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(13, 148, 136, 0.1), 0 4px 6px -4px rgba(0,0,0,0.05);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      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;
      overflow-x: hidden;
      background-image: radial-gradient(#ccfbf1 1px, transparent 1px), radial-gradient(#e0f2fe 1px, #f8fafc 1px);
      background-size: 40px 40px;
      background-position: 0 0, 20px 20px;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 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);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-wrap img.ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 6px;
      transition: var(--transition);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-dark), #0369a1);
      box-shadow: 0 6px 16px rgba(13, 148, 136, 0.35);
      transform: translateY(-1px);
      color: #ffffff;
    }

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* Section Global Styles */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-dark);
      background: var(--primary-light);
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 90px 0 70px;
      background: linear-gradient(180deg, rgba(240, 253, 250, 0.8) 0%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge-group {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: 30px;
      border: 1px solid #99f6e4;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #0d9488, #0284c7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-md);
    }

    .metric-card {
      text-align: center;
    }

    .metric-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    /* Card Components */
    .card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #5eead4;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
      font-weight: bold;
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* Models Ecosystem Bar */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: var(--transition);
    }

    .model-pill:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: var(--primary-light);
    }

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

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

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

    .eval-table th {
      background: #f1f5f9;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.95rem;
    }

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

    .eval-highlight {
      background: #f0fdfa;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 4px 10px;
      background: #fef3c7;
      color: #b45309;
      border-radius: 6px;
      font-weight: 700;
      font-size: 0.85rem;
    }

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

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

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 16px;
    }

    /* Media Showcase with allowed images */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #f1f5f9;
    }

    .media-card-img-wrap.square {
      aspect-ratio: 1/1;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 20px;
    }

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .review-avatar {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary), #38bdf8);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .review-user {
      font-weight: 700;
      color: var(--text-main);
    }

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

    .review-stars {
      color: #f59e0b;
      font-size: 0.9rem;
      margin-bottom: 8px;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Accordion FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-toggle {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      border-top: 1px solid #f8fafc;
    }

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

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

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 720px;
      margin: 0 auto;
    }

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

    .form-label {
      display: block;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      font-family: inherit;
      color: var(--text-main);
      background-color: #ffffff;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* Articles & Links Component */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      text-decoration: none;
      color: var(--text-main);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      background: var(--bg-cyan-soft);
      transform: translateX(4px);
    }

    .article-title {
      font-weight: 600;
      font-size: 0.95rem;
    }

    .article-arrow {
      color: var(--primary);
      font-weight: bold;
    }

    /* Contact Info Panel */
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .contact-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
    }

    .contact-card .qr-wrap {
      max-width: 140px;
      margin: 12px auto;
    }

    .contact-card .qr-wrap img {
      width: 100%;
      height: auto;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-title {
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-links li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links li a:hover {
      color: #2dd4bf;
    }

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

    .friendship-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.85rem;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      transition: var(--transition);
    }

    .friendship-links a:hover {
      color: #2dd4bf;
      background: #334155;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* Floating Widget */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      transition: var(--transition);
      font-size: 1.2rem;
      border: none;
      cursor: pointer;
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.08);
    }

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

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 16px;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .workflow-steps {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }