:root {
      --primary: #0284c7;
      --primary-neon: #00f2fe;
      --accent-neon: #10b981;
      --purple-neon: #8b5cf6;
      --bg-light: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --glow-shadow: 0 10px 30px rgba(0, 242, 254, 0.15);
      --container-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-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 20% 10%, rgba(0, 242, 254, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 80% 60%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
                  var(--bg-light);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

    /* Header & Nav */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 242, 254, 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 {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      max-height: 40px;
      width: auto;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.92rem;
      padding: 8px 12px;
      transition: all 0.25s ease;
      display: block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      text-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: none;
      font-size: 0.95rem;
    }

    .btn-neon {
      background: linear-gradient(135deg, #0284c7 0%, #00f2fe 100%);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(0, 242, 254, 0.35);
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 242, 254, 0.5);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 2px solid transparent;
      background-image: linear-gradient(#fff, #fff), linear-gradient(135deg, #00f2fe, #8b5cf6);
      background-origin: border-box;
      background-clip: padding-box, border-box;
    }

    .btn-outline:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.2);
    }

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

    /* Hero Section - NO IMAGES PER SPECIFICATION */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.4);
      border-radius: 30px;
      color: #0284c7;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

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

    .hero-title span {
      background: linear-gradient(135deg, #0284c7 0%, #8b5cf6 50%, #10b981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

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

    .stat-card {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 24px 16px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
      transition: transform 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, #00f2fe, #8b5cf6);
    }

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

    .stat-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* Section Styling */
    section {
      padding: 70px 0;
      border-bottom: 1px dashed rgba(226, 232, 240, 0.8);
    }

    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #0284c7;
      margin-bottom: 8px;
      display: block;
    }

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

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 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: 30px;
    }

    /* Cards */
    .feature-card {
      background: var(--card-bg);
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      border-color: rgba(0, 242, 254, 0.6);
      box-shadow: var(--glow-shadow);
      transform: translateY(-5px);
    }

    .icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(139, 92, 246, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #0284c7;
      margin-bottom: 18px;
      font-size: 1.2rem;
    }

    .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);
      flex-grow: 1;
    }

    /* Tag Cloud for Models */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 20px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 5px rgba(0,0,0,0.02);
      transition: all 0.25s ease;
    }

    .model-tag:hover {
      border-color: #00f2fe;
      background: linear-gradient(135deg, rgba(0,242,254,0.05), rgba(139,92,246,0.05));
      transform: translateY(-2px);
    }

    /* Comparison Table */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #fff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

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

    .eval-table th {
      background: #f1f5f9;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table tr:hover {
      background: rgba(0, 242, 254, 0.02);
    }

    .badge-star {
      display: inline-block;
      padding: 4px 12px;
      background: linear-gradient(135deg, #10b981, #059669);
      color: #fff;
      border-radius: 20px;
      font-weight: bold;
      font-size: 0.85rem;
    }

    /* Step Timeline */
    .timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: #fff;
      padding: 24px;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(2, 132, 199, 0.2);
      position: absolute;
      top: 15px;
      right: 20px;
    }

    /* Form Styles */
    .form-wrapper {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--glow-shadow);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-group label {
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: #0284c7;
      box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.2);
    }

    /* FAQ Accordion */
    .faq-accordion {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-icon {
      transition: transform 0.3s ease;
    }

    /* Media Library Cards */
    .media-card {
      background: #fff;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    .media-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .media-body {
      padding: 20px;
    }

    /* Articles & Links */
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      background: #fff;
      padding: 16px 20px;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-item a {
      color: var(--text-main);
      text-decoration: none;
      font-weight: 600;
    }

    .article-item a:hover {
      color: #0284c7;
    }

    /* Footer */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: auto;
    }

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

    .footer-title {
      color: #fff;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: #00f2fe;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      align-items: center;
    }

    .friend-links a {
      color: #94a3b8;
      text-decoration: none;
    }

    .friend-links a:hover {
      color: #00f2fe;
    }

    /* Floating Customer Service */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
      cursor: pointer;
      text-decoration: none;
      font-size: 1.2rem;
    }

    .qr-tooltip {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #fff;
      padding: 10px;
      border-radius: 12px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
      width: 140px;
      text-align: center;
    }

    .qr-tooltip img {
      width: 100%;
      height: auto;
      border-radius: 6px;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .timeline { grid-template-columns: repeat(2, 1fr); }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }

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

      .menu-toggle {
        display: block;
      }

      .grid-3, .grid-2, .grid-4, .timeline {
        grid-template-columns: 1fr;
      }

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

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

      .form-group.full {
        grid-column: span 1;
      }

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