:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-sub: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --primary: #06b6d4;
      --primary-neon: #00f0ff;
      --secondary: #8b5cf6;
      --accent: #ec4899;
      --border-neon: rgba(6, 182, 212, 0.3);
      --shadow-neon: 0 10px 25px -5px rgba(6, 182, 212, 0.15), 0 8px 10px -6px rgba(139, 92, 246, 0.1);
      --radius: 12px;
      --max-width: 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-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    }

    /* Container Standard */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Neon Accent Highlights */
    .neon-text {
      background: linear-gradient(135deg, #0284c7 0%, #7c3aed 50%, #db2777 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-weight: 800;
    }

    .neon-badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 50px;
      background: rgba(6, 182, 212, 0.1);
      color: #0891b2;
      border: 1px solid rgba(6, 182, 212, 0.4);
      box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
      margin-bottom: 12px;
    }

    /* Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(6, 182, 212, 0.2);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .nav-links {
      display: flex;
      gap: 0; /* Strictly set gap to 0 */
      list-style: none;
      align-items: center;
    }

    .nav-links li a {
      display: block;
      padding: 8px 10px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      text-decoration: none;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: #0891b2;
      text-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
    }

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

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
      border: none;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
      transition: all 0.3s ease;
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
      color: #ffffff;
    }

    .btn-outline {
      background: transparent;
      color: #0891b2;
      border: 1.5px solid #06b6d4;
    }

    .btn-outline:hover {
      background: rgba(6, 182, 212, 0.08);
      color: #0e7490;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 80px 0 60px 0;
      position: relative;
      background: radial-gradient(circle at 50% 20%, rgba(6, 182, 212, 0.12) 0%, rgba(139, 92, 246, 0.05) 50%, transparent 80%);
      text-align: center;
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 900;
      margin-bottom: 20px;
      color: var(--text-main);
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }

    .hero-stat-card {
      background: var(--bg-card);
      padding: 20px;
      border-radius: var(--radius);
      border: 1px solid rgba(6, 182, 212, 0.25);
      box-shadow: var(--shadow-neon);
      transition: transform 0.3s ease;
    }

    .hero-stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: #0891b2;
    }

    .stat-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .model-tags-bar {
      margin-top: 36px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .model-tag {
      font-size: 0.78rem;
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(139, 92, 246, 0.2);
      padding: 4px 10px;
      border-radius: 4px;
      color: #475569;
    }

    /* Common Section Base */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

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

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .section-sub {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Grid Layouts */
    .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;
    }

    /* Cards */
    .card-neon {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 28px;
      border: 1px solid rgba(6, 182, 212, 0.2);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      transition: all 0.3s ease;
      position: relative;
    }

    .card-neon:hover {
      border-color: rgba(139, 92, 246, 0.5);
      box-shadow: var(--shadow-neon);
      transform: translateY(-3px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: #0891b2;
      margin-bottom: 16px;
    }

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

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Comparison Table */
    .comparison-box {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid rgba(6, 182, 212, 0.3);
      overflow: hidden;
      box-shadow: var(--shadow-neon);
    }

    .rating-banner {
      background: linear-gradient(135deg, #0e7490 0%, #6d28d9 100%);
      color: #ffffff;
      padding: 20px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .comp-table th, .comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.95rem;
    }

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

    .comp-table tr:hover td {
      background: rgba(6, 182, 212, 0.03);
    }

    .highlight-col {
      background: rgba(6, 182, 212, 0.05);
      font-weight: 700;
      color: #0891b2;
    }

    /* Pricing Table */
    .price-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 30px;
      border: 1px solid rgba(139, 92, 246, 0.2);
      text-align: center;
      position: relative;
    }

    .price-card.featured {
      border: 2px solid #06b6d4;
      box-shadow: var(--shadow-neon);
    }

    .price-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: #0891b2;
      margin: 16px 0;
    }

    .price-list {
      list-style: none;
      margin: 20px 0;
      text-align: left;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .price-list li {
      padding: 6px 0;
      border-bottom: 1px dashed #e2e8f0;
    }

    /* FAQ Accordion */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card);
      border-radius: 8px;
      border: 1px solid #e2e8f0;
      padding: 18px 22px;
      transition: all 0.2s ease;
    }

    .faq-item:hover {
      border-color: #06b6d4;
    }

    .faq-question {
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

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

    /* User Reviews */
    .review-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid rgba(6, 182, 212, 0.2);
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .user-info h4 {
      font-size: 0.98rem;
      font-weight: 700;
    }

    .user-info span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* Form Design */
    .contact-form-box {
      background: var(--bg-card);
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid rgba(6, 182, 212, 0.3);
      box-shadow: var(--shadow-neon);
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: #06b6d4;
      box-shadow: 0 0 8px rgba(6, 182, 212, 0.2);
    }

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

    /* Footer */
    .footer-site {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid rgba(6, 182, 212, 0.3);
    }

    .footer-site a {
      color: #cbd5e1;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .footer-site a:hover {
      color: #00f0ff;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 18px;
    }

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.88rem;
    }

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

    /* Floating Customer Service Widget */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
      text-decoration: none;
      font-size: 1.2rem;
      cursor: pointer;
      position: relative;
    }

    .float-btn .qr-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #fff;
      padding: 10px;
      border-radius: 8px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      border: 1px solid #e2e8f0;
      width: 140px;
      text-align: center;
    }

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

    .qr-popover img {
      width: 120px;
      height: 120px;
      display: block;
      margin: 0 auto;
    }

    .qr-popover span {
      font-size: 0.75rem;
      color: #333;
      margin-top: 4px;
      display: block;
    }

    /* Responsive Adaptation */
    @media (max-width: 1024px) {
      .hero-stats-grid, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }

      .nav-links.active {
        display: flex;
      }

      .mobile-menu-btn {
        display: block;
      }

      .hero-title {
        font-size: 1.8rem;
      }

      .grid-3, .grid-2, .faq-grid, .hero-stats-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
    }