:root {
      --bg-color: #f8fafc;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --neon-cyan: #06b6d4;
      --neon-purple: #8b5cf6;
      --neon-pink: #ec4899;
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --border-color: #e2e8f0;
      --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 -1px rgba(0,0,0,0.04);
      --shadow-neon: 0 0 20px rgba(139, 92, 246, 0.15);
      --max-width: 1200px;
    }

    * {
      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-color);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      color: var(--neon-purple);
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* Header & Navigation */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 0.5rem 0.85rem;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      background-color: rgba(139, 92, 246, 0.08);
      color: var(--neon-purple);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.6rem 1.4rem;
      font-weight: 600;
      font-size: 0.95rem;
      border-radius: 8px;
      cursor: pointer;
      border: none;
      transition: all 0.3s ease;
      text-decoration: none;
    }

    .btn-neon {
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
    }

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

    .btn-outline {
      background: transparent;
      border: 2px solid var(--neon-purple);
      color: var(--neon-purple);
    }

    .btn-outline:hover {
      background: var(--neon-purple);
      color: #ffffff;
    }

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

    /* Hero Section - Strict No Image Rule */
    .hero-section {
      padding: 5rem 0 4rem;
      background: radial-gradient(circle at 50% 20%, rgba(6, 182, 212, 0.08) 0%, rgba(139, 92, 246, 0.05) 50%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.4rem 1rem;
      background: #ffffff;
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: 50px;
      font-size: 0.875rem;
      color: var(--neon-purple);
      margin-bottom: 1.5rem;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 1.2rem;
      background: linear-gradient(135deg, #0f172a 0%, #4338ca 50%, #8b5cf6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 2.5rem;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1.2rem;
      flex-wrap: wrap;
    }

    /* Section Component Styles */
    section {
      padding: 4.5rem 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 3.5rem;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--neon-cyan);
      margin-bottom: 0.5rem;
      display: block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      margin-top: 0.5rem;
      max-width: 650px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Stats Grid */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-top: -2rem;
      margin-bottom: 3rem;
    }

    .stat-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.8rem 1rem;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-neon);
      border-color: rgba(139, 92, 246, 0.4);
    }

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 0.3rem;
    }

    /* Cards Grid System */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

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

    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.8rem;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-purple);
      box-shadow: var(--shadow-neon);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--neon-purple);
      margin-bottom: 1.2rem;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 0.6rem;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* Models Cloud Tag */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      justify-content: center;
      margin-top: 1.5rem;
    }

    .tag-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 0.5rem 1rem;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-purple);
      box-shadow: 0 2px 8px rgba(6, 182, 212, 0.15);
    }

    /* Comparison Table Component */
    .table-wrapper {
      overflow-x: auto;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
    }

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

    .comp-table th, .comp-table td {
      padding: 1.2rem;
      border-bottom: 1px solid var(--border-color);
    }

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

    .comp-table tr:hover {
      background: rgba(139, 92, 246, 0.02);
    }

    .highlight-col {
      background: rgba(6, 182, 212, 0.04);
      font-weight: 600;
      color: var(--primary);
    }

    .rating-banner {
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.1));
      border: 1px solid rgba(139, 92, 246, 0.2);
      border-radius: 12px;
      padding: 1.5rem;
      margin-bottom: 2rem;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 1rem;
      text-align: center;
    }

    .rating-score {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--neon-purple);
    }

    /* Workflow Steps */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }

    .step-item {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.8rem 1.2rem;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
    }

    /* Testimonials & Reviews */
    .review-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.8rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-style: italic;
      margin-bottom: 1.2rem;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }

    .avatar-circle {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 1.2rem 1.5rem;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question:hover {
      color: var(--neon-purple);
    }

    .faq-answer {
      padding: 0 1.5rem 1.2rem;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: none;
      border-top: 1px dashed var(--border-color);
      margin-top: 0.5rem;
      padding-top: 1rem;
    }

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

    /* Form Section */
    .form-container {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 2.5rem;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.2rem;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
    }

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

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

    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--neon-purple);
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
    }

    /* Article List */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.2rem;
    }

    .article-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 1.2rem;
      transition: all 0.2s ease;
    }

    .article-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-2px);
    }

    /* Footer & Friend Links */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 4rem 0 2rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 2.5rem;
      margin-bottom: 3rem;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 1.1rem;
      margin-bottom: 1.2rem;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
    }

    .footer-links a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

    .footer-links a:hover {
      color: var(--neon-cyan);
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 1.8rem;
      margin-top: 1.8rem;
    }

    .friend-links-box h5 {
      color: #cbd5e1;
      font-size: 0.95rem;
      margin-bottom: 0.8rem;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .friend-links-list a {
      color: #94a3b8;
      font-size: 0.88rem;
    }

    .friend-links-list a:hover {
      color: var(--neon-cyan);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 1.8rem;
      text-align: center;
      font-size: 0.88rem;
      color: #64748b;
    }

    /* Floating Contact Modal & Widgets */
    .floating-widget {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      cursor: pointer;
      border: none;
      font-size: 1.2rem;
    }

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

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .stats-grid, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }