/* Reset & Base Variable */
    :root {
      --primary: #0062ff;
      --primary-light: #e6f0ff;
      --secondary: #7c3aed;
      --accent: #10b981;
      --dark: #0f172a;
      --gray-light: #f8fafc;
      --gray-border: #e2e8f0;
      --text-muted: #64748b;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      --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: var(--font-family);
      color: var(--dark);
      background-color: var(--gray-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* Container System */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    section {
      padding: 96px 0;
      position: relative;
    }

    /* Typography */
    h1, h2, h3, h4 {
      font-weight: 800;
      line-height: 1.25;
      color: var(--dark);
    }
    
    h1 {
      font-size: 2.75rem;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 24px;
    }

    h2 {
      font-size: 2.25rem;
      text-align: center;
      margin-bottom: 16px;
    }

    .section-subtitle {
      text-align: center;
      color: var(--text-muted);
      font-size: 1.125rem;
      max-width: 600px;
      margin: 0 auto 56px;
    }

    /* Common Components */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 9999px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      font-size: 0.95rem;
      border: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      box-shadow: 0 10px 25px -5px rgba(0, 98, 255, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 15px 30px -5px rgba(0, 98, 255, 0.5);
    }

    .btn-secondary {
      background-color: var(--primary-light);
      color: var(--primary);
    }

    .btn-secondary:hover {
      background-color: #dbeafe;
      transform: translateY(-2px);
    }

    .badge {
      display: inline-block;
      padding: 6px 16px;
      background: linear-gradient(135deg, rgba(0, 98, 255, 0.1), rgba(124, 58, 237, 0.1));
      color: var(--primary);
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    /* Header & Navigation */
    header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--gray-border);
      transition: var(--transition);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 80px;
    }

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

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

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-menu {
      display: flex;
      gap: 24px;
      list-style: none;
    }

    .nav-link {
      color: var(--dark);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
    }

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

    .nav-btn-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 25px;
      height: 3px;
      background-color: var(--dark);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* Hero Section (No Image) */
    .hero-section {
      padding-top: 180px;
      padding-bottom: 110px;
      background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 10% 80%, rgba(0, 98, 255, 0.08) 0%, transparent 40%),
                  #ffffff;
      text-align: center;
    }

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

    .hero-title-h1 {
      font-size: 3.5rem;
      margin-bottom: 24px;
      letter-spacing: -0.02em;
    }

    .hero-desc {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 40px;
      line-height: 1.8;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 48px;
    }

    /* Data Counter Card */
    .data-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }

    .stat-card {
      background-color: #ffffff;
      padding: 32px 24px;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08);
      border-color: var(--primary-light);
    }

    .stat-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .stat-label {
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
    }

    /* About Section */
    .about-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 64px;
      align-items: center;
    }

    .about-info {
      padding-right: 20px;
    }

    .about-p {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.8;
    }

    .about-details {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 32px;
    }

    .detail-item h4 {
      margin-bottom: 8px;
      font-size: 1.1rem;
      color: var(--dark);
    }

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

    .about-img-box {
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    }

    .about-img-box img {
      width: 100%;
      display: block;
      transition: var(--transition);
    }

    .about-img-box:hover img {
      transform: scale(1.05);
    }

    /* Service Models & Actions Area */
    .services-section {
      background-color: #ffffff;
    }

    .model-tags-wrap {
      margin-top: 32px;
      margin-bottom: 56px;
      text-align: center;
    }

    .model-tags-title {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      font-weight: 600;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }

    .model-tag {
      background-color: var(--gray-light);
      padding: 8px 18px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--dark);
      border: 1px solid var(--gray-border);
      transition: var(--transition);
    }

    .model-tag:hover {
      background-color: var(--primary-light);
      color: var(--primary);
      border-color: var(--primary);
      transform: translateY(-1px);
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .service-card {
      background-color: var(--gray-light);
      padding: 40px 32px;
      border-radius: 20px;
      border: 1px solid var(--gray-border);
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-5px);
      background-color: #ffffff;
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
      border-color: var(--primary);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 1.35rem;
      margin-bottom: 16px;
    }

    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

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

    .service-features-list li {
      font-size: 0.9rem;
      color: var(--dark);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-features-list li::before {
      content: "✓";
      color: var(--accent);
      font-weight: bold;
    }

    /* Solutions Section */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .solution-card {
      background-color: #ffffff;
      padding: 32px 24px;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
      transition: var(--transition);
    }

    .solution-card:hover {
      box-shadow: 0 15px 30px rgba(0,0,0,0.05);
      border-color: var(--secondary);
    }

    .solution-card h4 {
      font-size: 1.15rem;
      margin-bottom: 12px;
      color: var(--primary);
    }

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

    /* Process Flow */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .process-step {
      background-color: #ffffff;
      padding: 32px 24px;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
      position: relative;
    }

    .step-num {
      position: absolute;
      top: -20px;
      left: 24px;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    }

    .process-step h4 {
      margin-top: 12px;
      margin-bottom: 12px;
      font-size: 1.15rem;
    }

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

    /* Comparison Table / Token Pricing */
    .pricing-table-wrapper {
      overflow-x: auto;
      background-color: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
      box-shadow: 0 10px 25px -5px rgba(0,0,0,0.02);
      margin-top: 40px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 800px;
    }

    th, td {
      padding: 20px 24px;
      border-bottom: 1px solid var(--gray-border);
      font-size: 0.95rem;
    }

    th {
      background-color: var(--gray-light);
      font-weight: 700;
      color: var(--dark);
    }

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

    .highlight-row {
      background-color: var(--primary-light);
    }

    .compare-section {
      background-color: #ffffff;
    }

    .rating-banner {
      background: linear-gradient(135deg, var(--dark), #1e293b);
      color: #ffffff;
      padding: 40px;
      border-radius: 20px;
      margin-bottom: 56px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 32px;
    }

    .rating-info h3 {
      color: #ffffff;
      font-size: 1.75rem;
      margin-bottom: 8px;
    }

    .rating-info p {
      color: var(--gray-border);
      font-size: 0.95rem;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .stars {
      color: #fbbf24;
      font-size: 1.5rem;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--accent);
    }

    /* Training Section */
    .training-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .training-card {
      background-color: var(--gray-light);
      padding: 32px 20px;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
      text-align: center;
      transition: var(--transition);
    }

    .training-card:hover {
      background-color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: 0 15px 30px rgba(0,0,0,0.05);
    }

    .training-card h4 {
      font-size: 1.05rem;
      margin-bottom: 12px;
      color: var(--dark);
    }

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

    /* Cases & Banners */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 40px;
    }

    .case-card {
      background-color: #ffffff;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--gray-border);
    }

    .case-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
    }

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

    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 32px;
    }

    .case-body h4 {
      font-size: 1.35rem;
      margin-bottom: 12px;
    }

    .case-body p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    /* Reviews Section */
    .reviews-section {
      background-color: #ffffff;
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .review-card {
      background-color: var(--gray-light);
      padding: 32px;
      border-radius: 20px;
      border: 1px solid var(--gray-border);
      position: relative;
    }

    .review-text {
      font-style: italic;
      color: var(--dark);
      font-size: 0.95rem;
      margin-bottom: 24px;
      position: relative;
    }

    .review-text::before {
      content: "“";
      font-size: 4rem;
      color: rgba(0, 98, 255, 0.1);
      position: absolute;
      top: -30px;
      left: -10px;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .reviewer-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .reviewer-meta h5 {
      font-size: 0.95rem;
      margin-bottom: 2px;
    }

    .reviewer-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Help & Knowledge Base */
    .help-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
    }

    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-trigger {
      width: 100%;
      padding: 20px 24px;
      background: none;
      border: none;
      text-align: left;
      font-weight: 600;
      font-size: 1rem;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: var(--transition);
    }

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.925rem;
    }

    .faq-item.active .faq-content {
      padding-bottom: 20px;
    }

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

    .sidebar-help {
      display: flex;
      flex-direction: column;
      gap: 32px;
    }

    .help-box {
      background-color: #ffffff;
      padding: 32px;
      border-radius: 16px;
      border: 1px solid var(--gray-border);
    }

    .help-box h3 {
      font-size: 1.25rem;
      margin-bottom: 16px;
    }

    .term-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .term-list li {
      font-size: 0.9rem;
    }

    .term-list strong {
      color: var(--primary);
    }

    .articles-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .articles-list li a {
      font-size: 0.925rem;
      color: var(--dark);
      text-decoration: none;
      font-weight: 500;
      transition: var(--transition);
    }

    .articles-list li a:hover {
      color: var(--primary);
    }

    /* Contact Section (with Form) */
    .contact-section {
      background-color: #ffffff;
    }

    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
    }

    .form-box {
      background-color: var(--gray-light);
      padding: 40px;
      border-radius: 24px;
      border: 1px solid var(--gray-border);
    }

    .form-box h3 {
      font-size: 1.5rem;
      margin-bottom: 24px;
    }

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

    .form-label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--gray-border);
      font-family: var(--font-family);
      font-size: 0.95rem;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 98, 255, 0.15);
    }

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

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .info-item h4 {
      font-size: 1.1rem;
      margin-bottom: 4px;
    }

    .info-item p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .info-img-box {
      margin-top: 32px;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--gray-border);
    }

    .info-img-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* Footer & Partners */
    footer {
      background-color: var(--dark);
      color: #94a3b8;
      padding: 80px 0 32px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      margin-bottom: 56px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 24px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

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

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friendship-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.85rem;
      transition: var(--transition);
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .ai-page-home-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }

    .ai-page-home-link:hover {
      text-decoration: underline;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background-color: #ffffff;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      position: relative;
      transition: var(--transition);
      border: 1px solid var(--gray-border);
    }

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

    .float-qr {
      position: absolute;
      bottom: 60px;
      right: 0;
      background-color: #ffffff;
      padding: 16px;
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      display: none;
      border: 1px solid var(--gray-border);
      width: 160px;
      text-align: center;
    }

    .float-qr img {
      width: 128px;
      height: 128px;
      margin-bottom: 8px;
    }

    .float-qr span {
      font-size: 0.75rem;
      color: var(--dark);
      display: block;
      font-weight: 600;
    }

    .float-btn:hover .float-qr {
      display: block;
    }

    /* Responsive Styles */
    @media (max-width: 1024px) {
      .service-grid, .data-stats-grid, .solutions-grid, .process-timeline, .training-grid, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-wrapper, .contact-wrapper, .help-grid {
        grid-template-columns: 1fr;
      }
      .hero-title-h1 {
        font-size: 2.75rem;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: #ffffff;
        flex-direction: column;
        align-items: center;
        padding: 40px 0;
        transition: 0.4s ease;
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
      }

      .nav-menu.active {
        left: 0;
      }

      .menu-toggle {
        display: block;
      }

      .nav-btn-group {
        display: none;
      }

      .service-grid, .data-stats-grid, .solutions-grid, .process-timeline, .training-grid, .footer-grid, .cases-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }

      .hero-title-h1 {
        font-size: 2.25rem;
      }

      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }