:root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --accent-rainbow: linear-gradient(135deg, #ff4b72 0%, #ff8f3d 25%, #ffc83b 45%, #00c9a7 70%, #4d8af0 100%);
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-body: #f8fafc;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 12px 24px -4px rgba(79, 70, 229, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

    .rainbow-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 9999px;
      background: #eef2ff;
      color: #4f46e5;
      margin-bottom: 12px;
      border: 1px solid #c7d2fe;
    }

    .rainbow-border {
      position: relative;
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }
    .rainbow-border::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      border-radius: var(--radius) var(--radius) 0 0;
      background: var(--accent-rainbow);
    }

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

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

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

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

    .brand-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: #f1f5f9;
    }

    .nav-cta-btn {
      display: inline-block;
      padding: 8px 18px;
      background: var(--primary);
      color: #fff !important;
      font-weight: 600;
      font-size: 14px;
      border-radius: 6px;
      box-shadow: 0 2px 4px rgba(79, 70, 229, 0.25);
    }

    .nav-cta-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
    }

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

    .hero-section {
      padding: 64px 0 54px;
      background: radial-gradient(circle at 50% 0%, #e0e7ff 0%, #f8fafc 65%);
      text-align: center;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 44px;
      flex-wrap: wrap;
    }

    .btn-rainbow-main {
      padding: 12px 28px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
      border-radius: 8px;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
      border: none;
      cursor: pointer;
    }

    .btn-rainbow-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
    }

    .btn-secondary {
      padding: 12px 26px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
    }

    .btn-secondary:hover {
      background: #f1f5f9;
      border-color: #cbd5e1;
    }

    .model-pills-bar {
      max-width: 980px;
      margin: 0 auto;
      padding: 18px 24px;
      background: #ffffff;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .pills-title {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
      font-weight: 600;
      text-transform: uppercase;
    }

    .pills-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-pill {
      font-size: 12px;
      padding: 3px 10px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #334155;
      font-weight: 500;
      border: 1px solid #e2e8f0;
    }

    .section-wrap {
      padding: 60px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 42px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 10px;
    }

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

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

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

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

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

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #c7d2fe;
    }

    .feature-icon-bar {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      background: #eff6ff;
      color: var(--primary);
      font-weight: bold;
      font-size: 20px;
    }

    .feature-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }

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

    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 36px;
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      border-radius: var(--radius);
      display: block;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .ai-page-image:hover {
      box-shadow: var(--shadow-hover);
      transform: scale(1.01);
    }

    .platform-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .platform-specs-list {
      list-style: none;
      margin-top: 18px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .platform-specs-list li {
      font-size: 14px;
      color: #334155;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .platform-specs-list li::before {
      content: '✓';
      color: #10b981;
      font-weight: bold;
    }

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

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .custom-table th {
      background: #f8fafc;
      padding: 16px;
      color: #334155;
      font-weight: 700;
      border-bottom: 2px solid var(--border-color);
    }

    .custom-table td {
      padding: 16px;
      color: #475569;
      border-bottom: 1px solid var(--border-color);
    }

    .custom-table tr:hover td {
      background-color: #faf5ff;
    }

    .badge-highlight {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      background: #dcfce7;
      color: #15803d;
      font-weight: 600;
    }

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

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .step-box h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #0f172a;
    }

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

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

    .review-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }

    .user-info h4 {
      font-size: 15px;
      color: #0f172a;
      font-weight: 700;
    }

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

    .review-stars {
      color: #f59e0b;
      font-size: 14px;
    }

    .review-content {
      font-size: 14px;
      color: #334155;
      line-height: 1.6;
    }

    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: #1e293b;
    }

    .faq-question::after {
      content: '+';
      font-size: 18px;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #f8fafc;
      padding: 0 20px;
      color: #475569;
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 16px 20px;
      max-height: 300px;
    }

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

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      background: #fff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

    .contact-card-box {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: #334155;
    }

    .contact-row strong {
      color: #0f172a;
      min-width: 80px;
    }

    .qr-container {
      text-align: center;
      margin-top: 12px;
      padding: 16px;
      background: #f8fafc;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .qr-container img {
      max-width: 140px;
      height: auto;
      margin-bottom: 8px;
      border-radius: 4px;
    }

    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: #475569;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 32px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 14px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-muted);
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
    }

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

    .friend-links-area {
      padding: 16px 0;
      border-top: 1px dashed var(--border-color);
      border-bottom: 1px dashed var(--border-color);
      margin-bottom: 24px;
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links-area a {
      color: #475569;
    }

    .friend-links-area a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      text-align: center;
      font-size: 13px;
      color: #94a3b8;
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      font-size: 18px;
      transition: var(--transition);
    }

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

    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 30px; }
      .banner-gallery { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .grid-4, .grid-3 {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 24px;
      }
      .hero-btn-group {
        flex-direction: column;
        align-items: stretch;
      }
    }