:root {
      --primary-blue: #0052D4;
      --royal-blue: #165DFF;
      --dark-blue: #0A192F;
      --accent-cyan: #00F0FF;
      --accent-orange: #FF6B00;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --container-max-width: 1240px;
    }

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

    a {
      color: var(--royal-blue);
      text-decoration: none;
      transition: color 0.3s ease;
    }
    a:hover {
      color: var(--primary-blue);
    }

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

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }

    .nav-container {
      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;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-main);
      font-size: 14px;
      font-weight: 500;
      border-radius: 6px;
      transition: all 0.25s ease;
    }

    .nav-links li a:hover {
      color: var(--royal-blue);
      background-color: rgba(22, 93, 255, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-blue), var(--royal-blue));
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(22, 93, 255, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(22, 93, 255, 0.4);
      color: #FFFFFF;
    }

    .btn-outline {
      background: transparent;
      color: var(--royal-blue);
      border: 1px solid var(--royal-blue);
    }

    .btn-outline:hover {
      background: rgba(22, 93, 255, 0.05);
    }

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

    /* Section Styling Base */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(22, 93, 255, 0.08);
      color: var(--royal-blue);
      font-size: 13px;
      font-weight: 700;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      background: radial-gradient(120% 100% at 50% 0%, #0A192F 0%, #001E50 60%, #001030 100%);
      color: #FFFFFF;
      padding: 100px 0 90px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: -20%;
      left: 50%;
      transform: translateX(-50%);
      width: 800px;
      height: 400px;
      background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, rgba(22, 93, 255, 0) 70%);
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: 30px;
      font-size: 13px;
      color: var(--accent-cyan);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(180deg, #FFFFFF 0%, #D0E1FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: #A0AEC0;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
    }

    .btn-hero-visit {
      background: linear-gradient(135deg, #00F0FF, #0052D4);
      color: #001030;
      font-weight: 700;
      padding: 14px 36px;
      font-size: 16px;
      border-radius: 10px;
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
    }
    .btn-hero-visit:hover {
      color: #001030;
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
    }

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

    .stat-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 24px 16px;
      border-radius: 12px;
      text-align: center;
      backdrop-filter: blur(10px);
      transition: transform 0.3s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      background: rgba(255, 255, 255, 0.07);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 13px;
      color: #94A3B8;
    }

    /* Cards & Grid Utilities */
    .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;
    }

    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      transition: all 0.3s ease;
      position: relative;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 30px rgba(0, 82, 212, 0.08);
      border-color: rgba(22, 93, 255, 0.3);
    }

    /* Feature Badge Cloud */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }
    .model-tag:hover {
      background: var(--royal-blue);
      color: #FFFFFF;
      border-color: var(--royal-blue);
    }

    /* Comparison Section */
    .rating-box {
      background: linear-gradient(135deg, #0A192F, #002A66);
      color: #FFFFFF;
      border-radius: 16px;
      padding: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 0 10px 30px rgba(0, 51, 153, 0.15);
    }

    .rating-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .rating-big-num {
      font-size: 56px;
      font-weight: 900;
      color: #FFD700;
      line-height: 1;
    }

    .rating-stars {
      color: #FFD700;
      font-size: 24px;
      margin-bottom: 4px;
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--card-bg);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }

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

    .comparison-table th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-col {
      background: rgba(22, 93, 255, 0.03);
      font-weight: 700;
      color: var(--royal-blue);
    }

    /* Media Grid for Cases */
    .case-card {
      background: var(--card-bg);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      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;
      flex: 1;
    }

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

    .process-step {
      background: var(--card-bg);
      padding: 24px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--royal-blue);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

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

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

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      transition: background 0.2s ease;
    }
    .faq-question:hover {
      background: rgba(22, 93, 255, 0.02);
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      color: var(--text-muted);
      font-size: 14px;
      display: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }

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

    .faq-toggle {
      font-weight: 400;
      font-size: 20px;
      color: var(--royal-blue);
    }

    /* Testimonials */
    .testimonial-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue), var(--royal-blue));
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    /* Form Section */
    .form-container {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.04);
      max-width: 800px;
      margin: 0 auto;
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--royal-blue);
      box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* Article List */
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      padding: 16px;
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* Contact Details Grid */
    .contact-info-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 40px;
    }

    .contact-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
    }

    .qr-img {
      max-width: 160px;
      height: auto;
      border-radius: 8px;
      margin: 12px auto;
      border: 1px solid var(--border-color);
    }

    /* Footer */
    .footer {
      background: var(--dark-blue);
      color: #94A3B8;
      padding: 60px 0 30px 0;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

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

    .footer-brand {
      color: #FFFFFF;
    }

    .footer-title {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

    .footer-links a {
      color: #94A3B8;
      font-size: 14px;
    }

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

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-bottom: 20px;
    }

    .friendship-links a {
      color: #64748B;
      font-size: 13px;
    }

    .friendship-links a:hover {
      color: var(--accent-cyan);
    }

    .copyright {
      text-align: center;
      font-size: 13px;
      color: #64748B;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,0.05);
    }

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

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--royal-blue);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      cursor: pointer;
      font-size: 12px;
      font-weight: bold;
      text-decoration: none;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .hero-title { font-size: 28px; }
      .hero-desc { font-size: 15px; }
      .grid-3, .grid-4, .grid-2, .hero-stats-grid, .process-timeline, .contact-info-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .rating-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
      }
      .comparison-table {
        display: block;
        overflow-x: auto;
      }
    }