:root {
      --brand-primary: #10b981;
      --brand-primary-hover: #059669;
      --brand-secondary: #047857;
      --brand-accent: #34d399;
      --brand-light: #ecfdf5;
      --brand-subtle: #f0fdf4;
      --text-main: #0f172a;
      --text-regular: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
      --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(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.03);
      --shadow-hover: 0 20px 25px -5px rgba(16,185,129,0.15), 0 8px 10px -6px rgba(16,185,129,0.1);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-regular);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      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;
    }

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

    .logo-wrap .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-title span {
      color: var(--brand-primary);
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      gap: 0;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-regular);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
      display: block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: var(--brand-primary);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }

    .btn-primary:hover {
      background: var(--brand-primary-hover);
      color: #ffffff;
      box-shadow: var(--shadow-hover);
      transform: translateY(-1px);
    }

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

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

    .btn-portal {
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #ffffff !important;
      border: none;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
      padding: 10px 22px;
    }

    .btn-portal:hover {
      opacity: 0.95;
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    .hero-section {
      background: radial-gradient(circle at 80% 20%, #d1fae5 0%, #f0fdf4 35%, #f8fafc 70%);
      padding: 70px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #d1fae5;
      color: #065f46;
      padding: 6px 14px;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
      border: 1px solid #a7f3d0;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title mark {
      background: transparent;
      color: var(--brand-primary);
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-regular);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .h-feature-item {
      text-align: left;
      border-left: 3px solid var(--brand-primary);
      padding-left: 14px;
    }

    .h-feature-item strong {
      display: block;
      color: var(--text-main);
      font-size: 16px;
      margin-bottom: 4px;
    }

    .h-feature-item span {
      font-size: 13px;
      color: var(--text-muted);
    }

    .section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--brand-secondary);
      text-transform: uppercase;
      margin-bottom: 8px;
      display: inline-block;
      background: var(--brand-light);
      padding: 4px 10px;
      border-radius: 4px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--brand-accent);
      transform: translateY(-3px);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      background: var(--brand-light);
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-primary);
      margin-bottom: 16px;
      font-weight: 700;
      font-size: 18px;
    }

    .card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card p {
      font-size: 14px;
      color: var(--text-regular);
      line-height: 1.6;
    }

    .model-tags-container {
      background: var(--brand-subtle);
      border: 1px dashed var(--brand-primary);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-top: 30px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 16px;
    }

    .model-pill {
      background: #ffffff;
      color: var(--text-main);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 9999px;
      border: 1px solid var(--border-color);
      box-shadow: 0 1px 2px rgba(0,0,0,0.03);
    }

    .model-pill.highlight {
      background: var(--brand-light);
      color: var(--brand-secondary);
      border-color: var(--brand-accent);
    }

    .step-timeline {
      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-md);
      padding: 24px 20px;
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      background: var(--brand-primary);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      font-size: 14px;
    }

    .step-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

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

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

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

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

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

    .comp-table .highlight-col {
      background: rgba(16, 185, 129, 0.04);
      font-weight: 600;
      color: var(--brand-secondary);
    }

    .score-badge {
      display: inline-block;
      background: #fef3c7;
      color: #b45309;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 13px;
    }

    .faq-list {
      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: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

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

    .faq-toggle-icon {
      font-size: 18px;
      font-weight: normal;
      color: var(--brand-primary);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafbfc;
      border-top: 1px solid transparent;
    }

    .faq-answer-inner {
      padding: 16px 22px 20px;
      font-size: 14px;
      color: var(--text-regular);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      border-top-color: var(--border-color);
    }

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

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

    .t-quote {
      font-size: 14px;
      color: var(--text-regular);
      margin-bottom: 20px;
      font-style: italic;
      line-height: 1.6;
    }

    .t-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .t-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--brand-light);
      color: var(--brand-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .t-info strong {
      display: block;
      font-size: 14px;
      color: var(--text-main);
    }

    .t-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }

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

    .gallery-card .ai-page-image {
      width: 100%;
      aspect-ratio: 16/10;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .gallery-card:hover .ai-page-image {
      transform: scale(1.03);
    }

    .gallery-info {
      padding: 12px 14px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }

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

    .form-group {
      margin-bottom: 18px;
    }

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

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #ffffff;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--brand-primary);
      box-shadow: 0 0 0 3px rgba(16,185,129,0.15);
    }

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

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

    .contact-info-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 14px;
      color: var(--text-regular);
    }

    .contact-info-list strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-card {
      display: inline-block;
      padding: 12px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-top: 14px;
      text-align: center;
    }

    .qr-card img {
      width: 130px;
      height: 130px;
      margin: 0 auto 6px;
      object-fit: contain;
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item:hover {
      border-color: var(--brand-primary);
      transform: translateY(-2px);
    }

    .article-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .article-item p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.5;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 24px;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.7;
    }

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

    .footer-links li a {
      font-size: 13px;
      color: #94a3b8;
    }

    .footer-links li a:hover {
      color: var(--brand-accent);
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 13px;
      color: #cbd5e1;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-list a {
      font-size: 12px;
      color: #94a3b8;
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #64748b;
    }

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

    .floating-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-primary);
      cursor: pointer;
      font-size: 18px;
      transition: var(--transition);
      position: relative;
    }

    .floating-btn:hover {
      background: var(--brand-primary);
      color: #ffffff;
    }

    .floating-qr-popover {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .floating-btn:hover .floating-qr-popover {
      display: block;
    }

    @media (max-width: 992px) {
      .grid-4, .hero-features-bar, .step-timeline, .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        flex-direction: column;
        align-items: stretch;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.is-active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 4px;
        margin-bottom: 14px;
      }
      .hero-title {
        font-size: 26px;
      }
      .grid-2, .grid-3, .grid-4, .hero-features-bar, .step-timeline, .gallery-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }