:root {
      --primary: #4338ca;
      --primary-accent: #06b6d4;
      --secondary: #ec4899;
      --accent: #f59e0b;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --container-width: 1200px;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.03);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 20px 30px -10px rgba(67, 56, 202, 0.12);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .site-container {
      width: 100%;
      max-width: var(--container-width);
      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);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 700;
      background: linear-gradient(135deg, #4338ca 0%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s ease;
    }
    .nav-links li a:hover {
      color: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
      color: #ffffff;
      font-size: 14px;
      font-weight: 600;
      border-radius: 9999px;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .btn-portal:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.4);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 9999px;
      background: #eef2ff;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }
    .hero-stage {
      padding: 60px 0 70px 0;
      background: radial-gradient(circle at 10% 20%, rgba(236, 72, 153, 0.06) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 50% 50%, rgba(67, 56, 202, 0.05) 0%, transparent 60%);
      text-align: center;
      position: relative;
    }
    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #e0e7ff;
      border-radius: 9999px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
    }
    .hero-h1 {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: #0f172a;
      max-width: 860px;
      margin: 0 auto 20px auto;
      letter-spacing: -0.5px;
    }
    .hero-subtext {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto 32px auto;
    }
    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .btn-main-action {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #4338ca 0%, #ec4899 100%);
      border-radius: 9999px;
      box-shadow: 0 10px 25px rgba(236, 72, 153, 0.25);
      transition: all 0.25s ease;
    }
    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(236, 72, 153, 0.35);
    }
    .btn-outline-action {
      display: inline-flex;
      align-items: center;
      padding: 14px 30px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      transition: all 0.2s ease;
    }
    .btn-outline-action:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }
    .stat-tile {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: var(--shadow-sm);
    }
    .stat-val {
      font-size: 26px;
      font-weight: 800;
      color: #1e1b4b;
      margin-bottom: 4px;
    }
    .stat-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }
    .brand-chips-wrap {
      margin-top: 36px;
      padding-top: 24px;
      border-top: 1px dashed #cbd5e1;
    }
    .chip-title {
      font-size: 12px;
      font-weight: 600;
      color: #94a3b8;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }
    .chips-flex {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 900px;
      margin: 0 auto;
    }
    .model-chip {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 500;
      color: #475569;
    }
    .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: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      border-color: #c7d2fe;
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .service-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 20px;
      font-weight: 700;
    }
    .c-purple { background: #ede9fe; color: #6d28d9; }
    .c-pink { background: #fce7f3; color: #db2777; }
    .c-blue { background: #e0f2fe; color: #0284c7; }
    .c-cyan { background: #cffafe; color: #0891b2; }
    .c-amber { background: #fef3c7; color: #d97706; }
    .c-emerald { background: #d1fae5; color: #059669; }
    .service-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }
    .service-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .badge-pill {
      display: inline-block;
      align-self: flex-start;
      margin-top: 14px;
      font-size: 11px;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #475569;
    }
    .eval-container {
      background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #e2e8f0;
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-block {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }
    .score-large {
      font-size: 48px;
      font-weight: 900;
      color: #4338ca;
      line-height: 1;
    }
    .score-total {
      font-size: 18px;
      color: var(--text-muted);
      font-weight: 600;
    }
    .stars-render {
      color: #f59e0b;
      font-size: 20px;
    }
    .table-wrapper {
      width: 100%;
      overflow-x: auto;
    }
    .data-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .data-table th, .data-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
    }
    .data-table th {
      background: #f8fafc;
      color: #334155;
      font-weight: 700;
    }
    .data-table tr:hover td {
      background: #f8fafc;
    }
    .tag-pro {
      color: #059669;
      font-weight: 700;
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .gallery-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .gallery-thumb-container {
      width: 100%;
      background: #e2e8f0;
    }
    .gallery-thumb-container img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .gallery-info {
      padding: 18px;
    }
    .gallery-info h4 {
      font-size: 16px;
      margin-bottom: 6px;
      color: #0f172a;
    }
    .gallery-info p {
      font-size: 13px;
      color: var(--text-muted);
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0e7ff 0%, #fae8ff 100%);
      color: #4338ca;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }
    .user-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
    }
    .user-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-body {
      font-size: 13.5px;
      color: #475569;
      line-height: 1.5;
    }
    .faq-stack {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-node {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-node.active {
      border-color: #818cf8;
    }
    .faq-query {
      padding: 16px 20px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      font-size: 15px;
      color: #1e293b;
      user-select: none;
    }
    .faq-query::after {
      content: '+';
      font-size: 18px;
      font-weight: 400;
      color: #94a3b8;
      transition: transform 0.2s ease;
    }
    .faq-node.active .faq-query::after {
      content: '−';
      color: var(--primary);
    }
    .faq-reply {
      padding: 0 20px 18px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
    }
    .faq-node.active .faq-reply {
      display: block;
    }
    .action-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .panel-side-info h3 {
      font-size: 24px;
      margin-bottom: 12px;
      color: #0f172a;
    }
    .panel-side-info p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .info-list-group {
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 14px;
      color: #334155;
    }
    .qr-container {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px dashed #cbd5e1;
    }
    .qr-container img {
      width: 80px;
      height: 80px;
      object-fit: cover;
      border-radius: 4px;
    }
    .form-box form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-field-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-field-group label {
      font-size: 13px;
      font-weight: 600;
      color: #334155;
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: all 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
    }
    textarea.form-control {
      min-height: 90px;
      resize: vertical;
    }
    .btn-submit-req {
      padding: 13px;
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      background: #4338ca;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .btn-submit-req:hover {
      background: #3730a3;
    }
    .site-footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 60px 0 30px 0;
      font-size: 13.5px;
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      padding-bottom: 40px;
      border-bottom: 1px solid #1e293b;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-col p {
      color: #94a3b8;
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list a {
      color: #94a3b8;
      transition: color 0.2s ease;
    }
    .footer-links-list a:hover {
      color: #ffffff;
    }
    .footer-subline {
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: #64748b;
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      padding-top: 16px;
      border-top: 1px solid #1e293b;
      margin-top: 20px;
    }
    .friendly-links span {
      color: #64748b;
      font-weight: 600;
    }
    .friendly-links a {
      color: #94a3b8;
      font-size: 12px;
    }
    .friendly-links a:hover {
      color: #ffffff;
    }
    .float-assist {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .assist-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
      font-size: 18px;
    }
    .assist-btn:hover {
      transform: scale(1.05);
      background: #4338ca;
      color: #ffffff;
    }
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-row { grid-template-columns: repeat(2, 1fr); }
      .footer-top-grid { grid-template-columns: 1fr 1fr; }
      .action-panel { grid-template-columns: 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: 20px;
      }
      .nav-menu.active { display: block; }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }
      .nav-links li { width: 100%; }
      .nav-links li a { display: block; padding: 10px 0; }
      .hero-h1 { font-size: 28px; }
      .grid-3 { grid-template-columns: 1fr; }
      .grid-4 { grid-template-columns: 1fr; }
      .gallery-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .section-wrap { padding: 48px 0; }
    }