/* CSS Standard Reset & Base Vars - Rainbow Theme Colorway */
    :root {
      --primary-grad: linear-gradient(135deg, #ff5e62 0%, #ff9966 25%, #ffd97d 50%, #6bc5d2 75%, #a88beb 100%);
      --rainbow-accent-1: #ff4757;
      --rainbow-accent-2: #ffa502;
      --rainbow-accent-3: #2ed573;
      --rainbow-accent-4: #1e90ff;
      --rainbow-accent-5: #a55eea;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-dark: #1e293b;
      --text-muted: #64748b;
      --border-light: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --radius-lg: 16px;
      --radius-md: 10px;
    }

    * {
      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-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: #f8fafc;
    }

    /* Container Standard */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Typography & Utilities */
    h1, h2, h3, h4 {
      color: var(--text-dark);
      font-weight: 700;
      line-height: 1.3;
    }
    
    .rainbow-text {
      background: linear-gradient(120deg, #ff4757, #ffa502, #2ed573, #1e90ff, #a55eea);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .rainbow-border-top {
      position: relative;
    }
    .rainbow-border-top::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--primary-grad);
      border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 50px;
      background: #f1f5f9;
      color: #334155;
      margin-bottom: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 50px;
      text-decoration: none;
      transition: all 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .btn-rainbow {
      background: var(--primary-grad);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 100, 100, 0.3);
    }
    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 100, 100, 0.45);
      opacity: 0.95;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-dark);
      border: 2px solid #cbd5e1;
    }
    .btn-outline:hover {
      border-color: var(--rainbow-accent-4);
      color: var(--rainbow-accent-4);
      transform: translateY(-2px);
    }

    /* Section Styling Base */
    .section-padding {
      padding: 80px 0;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-title-wrap h2 {
      font-size: 2.2rem;
      margin-bottom: 15px;
    }
    .section-title-wrap p {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    /* Header Nav Rules */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }
    .brand-logo img.ai-page-logo {
      height: 40px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* Strictly required gap: 0 */
      list-style: none;
    }
    .nav-links li a {
      display: block;
      padding: 10px 14px;
      color: var(--text-dark);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: color 0.2s ease;
    }
    .nav-links li a:hover, .nav-links li a.ai-page-home-link {
      color: var(--rainbow-accent-1);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }

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

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 20%, rgba(255, 153, 102, 0.12), rgba(168, 139, 235, 0.08) 50%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
    }
    .hero-h1 {
      font-size: 2.8rem;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 35px;
    }
    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 20px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      max-width: 900px;
      margin: 0 auto;
    }
    .tag-pill {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #475569;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }
    .tag-pill:hover {
      border-color: var(--rainbow-accent-4);
      transform: translateY(-2px);
    }

    /* Metrics Section */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
    }
    .metric-card {
      background: #ffffff;
      padding: 30px 20px;
      border-radius: var(--radius-lg);
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.3s;
    }
    .metric-card:hover {
      transform: translateY(-50px);
    }
    .metric-num {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 5px;
    }
    .metric-label {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Cards Grid Systems */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(30, 144, 255, 0.4);
    }
    .service-icon-box {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(255,71,87,0.1), rgba(30,144,255,0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
    }
    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Table Styling */
    .table-wrapper {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
    }
    .custom-table th {
      background: #f8fafc;
      font-weight: 600;
      color: var(--text-dark);
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-row {
      background: rgba(255, 247, 237, 0.6);
    }

    /* Review Card */
    .review-card {
      background: #ffffff;
      padding: 25px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 15px;
    }
    .avatar-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-grad);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .review-author h4 {
      font-size: 1rem;
    }
    .review-author span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .stars {
      color: #ffa502;
      margin-bottom: 10px;
    }

    /* Accordion FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      padding: 20px;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #f8fafc;
    }
    .faq-answer-inner {
      padding: 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      border-top: 1px solid var(--border-light);
    }

    /* Form Section */
    .form-container {
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-light);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.95rem;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      font-size: 1rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--rainbow-accent-4);
    }

    /* Case Media Showcase */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }
    .case-img-wrap {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #e2e8f0;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .case-content {
      padding: 20px;
    }

    /* Article Area Links */
    .article-links-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-light);
    }
    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-links-list li a {
      color: var(--rainbow-accent-4);
      text-decoration: none;
      font-weight: 500;
      transition: color 0.2s;
    }
    .article-links-list li a:hover {
      color: var(--rainbow-accent-1);
    }

    /* Footer & System Footer */
    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
    }
    footer a {
      color: #cbd5e1;
      text-decoration: none;
      transition: color 0.2s;
    }
    footer a:hover {
      color: #ffffff;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.9rem;
    }
    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
    }
    .copyright-bar {
      border-top: 1px solid #1e293b;
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* Floating Customer Service */
    .float-service {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      border: 1px solid var(--border-light);
      text-align: center;
    }
    .float-service img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      display: block;
      margin: 0 auto 6px;
    }
    .float-service span {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--text-dark);
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-h1 {
        font-size: 2.2rem;
      }
    }
    @media (max-width: 768px) {
      .grid-3, .grid-4, .grid-2, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .float-service {
        display: none;
      }
    }