:root {
      --primary-cyan: #0d9488;
      --primary-dark-cyan: #0f766e;
      --accent-teal: #14b8a6;
      --accent-light: #ccfbf1;
      --text-main: #134e48;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --bg-light: #f0fdfa;
      --bg-card: #ffffff;
      --bg-alt: #e6fffa;
      --border-color: #99f6e4;
      --shadow-sm: 0 4px 6px -1px rgba(13, 148, 136, 0.08), 0 2px 4px -2px rgba(13, 148, 136, 0.05);
      --shadow-md: 0 12px 24px -4px rgba(15, 118, 110, 0.12);
      --radius-base: 12px;
      --container-max: 1200px;
    }
    * {
      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-dark);
      line-height: 1.6;
    }
    body {
      background: linear-gradient(180deg, #f0fdfa 0%, #ffffff 35%, #f0fdfa 70%, #e6fffa 100%);
      min-height: 100vh;
      overflow-x: hidden;
      color: var(--text-dark);
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      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;
    }
    .brand-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark-cyan);
      letter-spacing: 0.5px;
    }
    .nav-container {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }
    .nav-links li a:hover {
      color: var(--primary-dark-cyan);
      background-color: var(--accent-light);
    }
    .header-cta {
      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: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--accent-teal) 0%, var(--primary-dark-cyan) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(13, 148, 136, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      color: var(--primary-dark-cyan);
      border-color: var(--primary-cyan);
    }
    .btn-outline:hover {
      background: var(--accent-light);
      transform: translateY(-2px);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      color: var(--primary-dark-cyan);
      cursor: pointer;
      padding: 4px 8px;
    }
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 5px 14px;
      background: var(--accent-light);
      color: var(--primary-dark-cyan);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.2rem;
      color: var(--text-dark);
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }
    .hero-section {
      padding: 100px 0 80px 0;
      background: radial-gradient(circle at 50% 10%, #ccfbf1 0%, #f0fdfa 60%, #ffffff 100%);
      text-align: center;
      position: relative;
    }
    .hero-container {
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 18px;
      background: rgba(13, 148, 136, 0.1);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      color: var(--primary-dark-cyan);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--primary-cyan);
      background: linear-gradient(120deg, #0d9488 0%, #0891b2 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-badge-row {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
      max-width: 820px;
      margin: 0 auto;
    }
    .hero-badge-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--primary-dark-cyan);
      font-weight: 500;
      box-shadow: var(--shadow-sm);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }
    .metric-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-base);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-cyan);
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .about-box {
      background: #ffffff;
      border-radius: var(--radius-base);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .about-lead {
      font-size: 1.15rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 20px;
      line-height: 1.8;
    }
    .about-content {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 30px;
    }
    .about-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .about-f-item {
      background: var(--bg-light);
      padding: 20px;
      border-radius: 8px;
      border-left: 4px solid var(--primary-cyan);
    }
    .about-f-item h4 {
      font-size: 1.05rem;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .about-f-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 28px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent-teal);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--accent-light);
      color: var(--primary-dark-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 18px;
    }
    .service-card h3 {
      font-size: 1.25rem;
      color: var(--text-dark);
      margin-bottom: 12px;
      font-weight: 700;
    }
    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }
    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .service-tag {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: #334155;
      padding: 3px 8px;
      border-radius: 4px;
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }
    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 24px 18px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-idx {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-cyan);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px auto;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .step-name {
      font-size: 1.1rem;
      color: var(--text-dark);
      margin-bottom: 8px;
      font-weight: 700;
    }
    .step-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-img-wrap {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
    }
    .case-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .case-cat {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary-dark-cyan);
      margin-bottom: 6px;
    }
    .case-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .case-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .review-score-banner {
      background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-alt) 100%);
      border: 2px solid var(--accent-teal);
      border-radius: var(--radius-base);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-left h3 {
      font-size: 1.4rem;
      color: var(--text-dark);
      margin-bottom: 6px;
    }
    .score-left p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }
    .score-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .star-badge {
      font-size: 1.5rem;
      color: #eab308;
      font-weight: 700;
      letter-spacing: 2px;
    }
    .score-number {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-dark-cyan);
      line-height: 1;
    }
    .score-total {
      font-size: 1.1rem;
      color: var(--text-muted);
      font-weight: 600;
    }
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-base);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 0.95rem;
    }
    .custom-table th {
      background: #f8fafc;
      color: var(--text-dark);
      font-weight: 700;
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .custom-table td.highlight {
      background: rgba(204, 251, 241, 0.4);
      color: var(--primary-dark-cyan);
      font-weight: 600;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .user-avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--accent-light);
      color: var(--primary-dark-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .user-meta h4 {
      font-size: 1rem;
      color: var(--text-dark);
      line-height: 1.3;
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-stars {
      color: #f59e0b;
      font-size: 0.9rem;
      margin-bottom: 10px;
    }
    .review-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .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: 8px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      width: 100%;
      padding: 18px 24px;
      background: #ffffff;
      border: none;
      outline: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      text-align: left;
    }
    .faq-header:hover {
      background: #f8fafc;
      color: var(--primary-dark-cyan);
    }
    .faq-arrow {
      font-size: 1rem;
      transition: transform 0.25s ease;
      color: var(--primary-cyan);
    }
    .faq-content {
      padding: 0 24px 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active .faq-content {
      display: block;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border-radius: var(--radius-base);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
      padding: 40px;
    }
    .contact-info h3 {
      font-size: 1.6rem;
      color: var(--text-dark);
      margin-bottom: 16px;
    }
    .contact-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }
    .contact-list li {
      font-size: 0.95rem;
      color: var(--text-dark);
    }
    .contact-list li strong {
      color: var(--primary-dark-cyan);
      margin-right: 8px;
    }
    .qr-box {
      text-align: center;
      max-width: 140px;
      padding: 10px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #f8fafc;
    }
    .qr-box img {
      width: 100%;
      height: auto;
      margin-bottom: 6px;
    }
    .qr-box span {
      font-size: 0.78rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      font-size: 0.95rem;
      color: var(--text-dark);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-control:focus {
      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;
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 20px;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }
    .article-item:hover {
      border-color: var(--accent-teal);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }
    .article-item a {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 8px;
      display: block;
    }
    .article-item a:hover {
      color: var(--primary-cyan);
    }
    .article-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 20px 0;
      color: var(--text-dark);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: var(--primary-dark-cyan);
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links li a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-links li a:hover {
      color: var(--primary-dark-cyan);
    }
    .friend-links {
      border-top: 1px dashed var(--border-color);
      padding-top: 20px;
      margin-bottom: 24px;
    }
    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .friend-links-wrap a {
      font-size: 0.85rem;
      color: var(--text-muted);
      background: var(--bg-light);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }
    .friend-links-wrap a:hover {
      color: var(--primary-dark-cyan);
      background: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #e2e8f0;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-item {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary-dark-cyan);
      font-size: 1.2rem;
      position: relative;
    }
    .float-item:hover {
      background: var(--accent-light);
    }
    .float-item .popover-qr {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 10px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: none;
      width: 140px;
      text-align: center;
    }
    .float-item:hover .popover-qr {
      display: block;
    }
    @media (max-width: 1024px) {
      .grid-4, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-container {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        padding: 16px 20px;
      }
      .nav-container.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        width: 100%;
        padding: 10px 0;
        border-bottom: 1px solid #f1f5f9;
      }
      .header-cta {
        display: none;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .cases-grid, .reviews-grid, .articles-grid, .about-features {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }