:root {
      --primary: #0d9488;
      --primary-dark: #0f766e;
      --primary-light: #ccfbf1;
      --accent: #0284c7;
      --accent-gradient: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }

    * {
      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, "Noto Sans", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .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);
      transition: all 0.3s ease;
    }

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

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      max-height: 42px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

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

    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      line-height: 1.4;
      text-align: center;
    }

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

    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(13, 148, 136, 0.35);
    }

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

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

    .btn-xl {
      padding: 14px 32px;
      font-size: 17px;
      border-radius: var(--radius-lg);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }

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

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

    .section-muted {
      background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    }

    .section-cyan {
      background: linear-gradient(180deg, #f0fdfa 0%, #e0f2fe 100%);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .hero-section {
      padding: 90px 0 80px;
      background: radial-gradient(circle at 80% 20%, #ccfbf1 0%, rgba(248, 250, 252, 0) 50%),
                  radial-gradient(circle at 10% 80%, #e0f2fe 0%, rgba(248, 250, 252, 0) 50%),
                  #f8fafc;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .hero-content h1 span {
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.6;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }

    .highlight-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .highlight-icon {
      width: 20px;
      height: 20px;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .hero-card-panel {
      background: #ffffff;
      border: 1px solid #ccfbf1;
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: 0 20px 30px -10px rgba(13, 148, 136, 0.12);
      display: flex;
      flex-direction: column;
      gap: 20px;
      position: relative;
    }

    .hero-card-panel::before {
      content: "";
      position: absolute;
      top: -2px;
      left: -2px;
      right: -2px;
      bottom: -2px;
      background: var(--accent-gradient);
      border-radius: calc(var(--radius-xl) + 2px);
      z-index: -1;
      opacity: 0.15;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
    }

    .panel-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: 6px;
    }

    .panel-metrics {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .metric-card {
      background: var(--bg-base);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .metric-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    .models-stream {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 6px;
    }

    .model-chip {
      font-size: 12px;
      font-weight: 500;
      padding: 4px 8px;
      background: #f1f5f9;
      color: var(--text-muted);
      border-radius: 4px;
    }

    .stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: -36px;
      position: relative;
      z-index: 10;
    }

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

    .stats-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .stats-num em {
      font-style: normal;
      font-size: 20px;
      color: var(--primary);
    }

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

    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

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

    .cards-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #99f6e4;
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    .feature-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px dashed var(--border-color);
    }

    .tag-sm {
      font-size: 12px;
      padding: 2px 8px;
      background: #f1f5f9;
      color: var(--text-muted);
      border-radius: 4px;
    }

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

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

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

    .process-card h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .process-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

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

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

    .col-highlight {
      background-color: rgba(204, 251, 241, 0.25);
      color: var(--primary-dark);
      font-weight: 600;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: #fef08a;
      color: #854d0e;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 700;
      font-size: 12px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      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: 14px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent-gradient);
      color: #ffffff;
      font-weight: 700;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .review-user-name {
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
    }

    .review-user-role {
      font-size: 13px;
      color: var(--text-light);
    }

    .review-rating {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 14px;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

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

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
    }

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

    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 40px;
      box-shadow: var(--shadow-lg);
      max-width: 800px;
      margin: 0 auto;
    }

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

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 14px;
      color: var(--text-main);
      background-color: #f8fafc;
      transition: all 0.2s ease;
    }

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

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

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

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }

    .article-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .article-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 10px;
    }

    .article-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .article-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .article-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 32px;
    }

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

    .gallery-item img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
    }

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

    .gallery-info h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 4px;
    }

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

    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 64px 0 28px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-links a {
      font-size: 14px;
      color: #94a3b8;
      transition: color 0.2s ease;
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .footer-qr-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-top: 16px;
    }

    .qr-box {
      background: #ffffff;
      padding: 6px;
      border-radius: var(--radius-sm);
      width: 88px;
      height: 88px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .qr-desc {
      font-size: 12px;
      color: #cbd5e1;
      line-height: 1.5;
    }

    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid #1e293b;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 13px;
    }

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .footer-friend-links a {
      color: #94a3b8;
    }

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

    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 32px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      transition: all 0.25s ease;
      text-decoration: none;
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 12px 16px;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .cards-grid-3,
      .cards-grid-2,
      .cards-grid-4,
      .gallery-grid,
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .stats-bar {
        grid-template-columns: 1fr;
        margin-top: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }