:root {
      --primary-cyan: #0d9488;
      --primary-cyan-light: #14b8a6;
      --primary-cyan-dark: #0f766e;
      --accent-teal: #06b6d4;
      --gradient-main: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #06b6d4 100%);
      --gradient-subtle: linear-gradient(180deg, #f0fdfa 0%, #ffffff 100%);
      --gradient-card: linear-gradient(145deg, #ffffff 0%, #f0fdfa 100%);
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-muted: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #ccfbf1;
      --border-subtle: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(13, 148, 136, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(13, 148, 136, 0.08), 0 2px 4px -1px rgba(13, 148, 136, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(13, 148, 136, 0.1), 0 4px 6px -2px rgba(13, 148, 136, 0.05);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --max-width: 1240px;
      --transition: all 0.25s 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, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-cyan-dark);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--accent-teal);
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

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

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

    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-cyan-dark);
      background-color: #f0fdfa;
    }

    .nav-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: var(--radius-full);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }

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

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(13, 148, 136, 0.35);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background: #f0fdfa;
      border-color: var(--primary-cyan-dark);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    .hero-section {
      background: linear-gradient(180deg, #ecfdf5 0%, #f0fdfa 50%, var(--bg-page) 100%);
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: rgba(13, 148, 136, 0.1);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      color: var(--primary-cyan-dark);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

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

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-cyan-light);
    }

    .stat-value {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary-cyan-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-subtle);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

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

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

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

    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-text-block h3 {
      font-size: 1.6rem;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .intro-text-block p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 1rem;
    }

    .feature-check-list {
      list-style: none;
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .feature-check-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-main);
      font-size: 0.95rem;
      font-weight: 500;
    }

    .check-icon {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #ccfbf1;
      color: var(--primary-cyan-dark);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: bold;
    }

    .models-badge-cloud {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-tag {
      padding: 6px 14px;
      background: #f0fdfa;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--primary-cyan-dark);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary-cyan);
      color: #ffffff;
      transform: scale(1.05);
    }

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

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

    .card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, #ccfbf1 0%, #99f6e4 100%);
      color: var(--primary-cyan-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }

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

    .card-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .process-step {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--gradient-main);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(13, 148, 136, 0.3);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .custom-table th {
      background: #f0fdfa;
      color: var(--primary-cyan-dark);
      font-weight: 700;
      font-size: 0.95rem;
    }

    .custom-table tr:hover {
      background: #f8fafc;
    }

    .badge-recommend {
      background: var(--primary-cyan);
      color: #ffffff;
      padding: 4px 8px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .evaluation-score-box {
      background: linear-gradient(135deg, #0f766e 0%, #0d9488 100%);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
    }

    .score-left h3 {
      font-size: 1.5rem;
      margin-bottom: 8px;
    }

    .score-stars {
      color: #facc15;
      font-size: 1.2rem;
    }

    .score-right {
      text-align: right;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1;
    }

    .score-max {
      font-size: 1rem;
      opacity: 0.8;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #ffffff;
    }

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

    .faq-toggle-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary-cyan);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f0fdfa;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

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

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ccfbf1;
      color: var(--primary-cyan-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .reviewer-name {
      font-weight: 700;
      color: var(--text-main);
      font-size: 0.95rem;
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-stars {
      color: #f59e0b;
      font-size: 0.85rem;
      margin-bottom: 10px;
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .media-gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }

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

    .gallery-item img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
      object-fit: cover;
    }

    .gallery-item:hover img {
      transform: scale(1.02);
    }

    .gallery-caption {
      padding: 12px 16px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border-top: 1px solid var(--border-subtle);
    }

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

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

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

    .article-link {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 500;
    }

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

    .article-date {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-form-box {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

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

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

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

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

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .info-card {
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .info-icon {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #f0fdfa;
      color: var(--primary-cyan-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      flex-shrink: 0;
    }

    .info-text-title {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .info-text-value {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .qrcode-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      max-width: 220px;
    }

    .qrcode-box img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-sm);
      display: block;
      margin-bottom: 8px;
    }

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

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

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-links h5 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      font-size: 0.875rem;
    }

    .footer-links a:hover {
      color: var(--primary-cyan-light);
    }

    .friend-links-area {
      border-top: 1px solid #1e293b;
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-area span {
      font-size: 0.85rem;
      color: #64748b;
    }

    .friend-links-area a {
      color: #94a3b8;
      font-size: 0.85rem;
    }

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

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

    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary-cyan-dark);
      font-size: 1.2rem;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary-cyan);
      color: #ffffff;
      transform: scale(1.05);
    }

    .float-qr-popup {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      display: none;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
    }

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

    @media (max-width: 1024px) {
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 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: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 2rem;
      }
      .intro-grid,
      .contact-wrapper,
      .media-gallery-grid {
        grid-template-columns: 1fr;
      }
      .grid-3,
      .grid-4,
      .reviews-grid,
      .article-list {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .evaluation-score-box {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
      .score-right {
        text-align: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }