:root {
      --primary: #0c7ac4;
      --primary-dark: #055489;
      --accent: #18c29c;
      --bg-light: #f7f9fc;
      --text-main: #222;
      --text-muted: #666;
      --border-color: #e1e5ee;
      --radius-lg: 14px;
      --shadow-soft: 0 12px 30px rgba(15, 35, 95, 0.08);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background-color: #ffffff;
      color: var(--text-main);
      line-height: 1.6;
    }

    img {
      max-width: 100%;
      display: block;
    }

    a {
      color: var(--primary);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    .page-wrapper {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px;
    }

    @media (min-width: 768px) {
      .page-wrapper {
        padding: 32px 24px 48px;
      }
    }

    /* HERO SECTION */
    .hero {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
      padding: 24px 18px;
      background: radial-gradient(circle at 0 0, #e0f2ff, #ffffff 50%) no-repeat;
      border-radius: 20px;
      box-shadow: var(--shadow-soft);
      margin-bottom: 32px;
    }

    @media (min-width: 900px) {
      .hero {
        grid-template-columns: 1.3fr 1fr;
        align-items: center;
        padding: 32px 32px 36px;
      }
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      padding: 6px 12px;
      border-radius: 999px;
      background: rgba(12, 122, 196, 0.06);
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 12px;
    }

    .hero-tag span.dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    .hero h1 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #111827;
    }

    @media (min-width: 768px) {
      .hero h1 {
        font-size: 32px;
      }
    }

    .hero-subtitle {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .hero-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 18px;
    }

    .hero-pill {
      font-size: 12px;
      padding: 6px 10px;
      border-radius: 999px;
      border: 1px solid rgba(12, 122, 196, 0.18);
      background: rgba(255, 255, 255, 0.95);
      color: #1f2933;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .hero-pill strong {
      font-weight: 700;
    }

    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
      margin-bottom: 14px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #fff;
      border: none;
      border-radius: 999px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 10px 25px rgba(12, 122, 196, 0.34);
      transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      filter: brightness(1.03);
      box-shadow: 0 16px 35px rgba(12, 122, 196, 0.4);
    }

    .btn-outline {
      background: #ffffff;
      border-radius: 999px;
      padding: 9px 18px;
      font-size: 13px;
      border: 1px solid var(--border-color);
      font-weight: 500;
      color: #111827;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }

    .hero-meta {
      font-size: 12px;
      color: var(--text-muted);
    }

    .hero-meta span {
      font-weight: 500;
      color: #111827;
    }

    .hero-image-wrapper {
      position: relative;
      border-radius: 18px;
      background: radial-gradient(circle at 20% 0, #e5f3ff, #ffffff 50%);
      padding: 16px;
      border: 1px solid rgba(12, 122, 196, 0.12);
    }

    @media (min-width: 900px) {
      .hero-image-wrapper {
        padding: 22px;
      }
    }

    .hero-image-placeholder {
      width: 100%;
      aspect-ratio: 4/3;
      border-radius: 16px;
      background: linear-gradient(135deg, #e9f3ff, #f7f9ff);
      border: 1px dashed rgba(12, 122, 196, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
      padding: 12px;
    }

    .hero-badge {
      position: absolute;
      right: 14px;
      top: 14px;
      background: rgba(12, 122, 196, 0.95);
      color: #fff;
      border-radius: 999px;
      font-size: 11px;
      padding: 6px 12px;
      box-shadow: 0 12px 30px rgba(12, 122, 196, 0.45);
    }

    .hero-stat-card {
      position: absolute;
      left: 14px;
      bottom: 14px;
      background: #ffffff;
      border-radius: 12px;
      padding: 8px 10px;
      font-size: 11px;
      color: var(--text-main);
      box-shadow: 0 12px 24px rgba(15, 23, 42, 0.18);
    }

    .hero-stat-card strong {
      display: block;
      font-size: 13px;
    }

    /* REUSABLE SECTION STYLES */
    .section {
      margin-bottom: 32px;
    }

    .section-header {
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #111827;
    }

    .section-subtitle {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Pain Points & Solutions */
    .grid {
      display: grid;
      gap: 16px;
    }

    @media (min-width: 768px) {
      .grid-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .grid-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }
    }

    .card {
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 16px 14px;
      background: #ffffff;
      box-shadow: 0 4px 18px rgba(15, 23, 42, 0.03);
    }

    .card-badge {
      font-size: 11px;
      font-weight: 600;
      color: var(--primary-dark);
      background: rgba(12, 122, 196, 0.07);
      padding: 3px 8px;
      border-radius: 999px;
      display: inline-block;
      margin-bottom: 8px;
    }

    .card h3 {
      font-size: 15px;
      margin-bottom: 6px;
      color: #111827;
    }

    .card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .card ul {
      list-style: none;
      padding-left: 0;
      margin-top: 6px;
    }

    .card ul li {
      font-size: 13px;
      color: var(--text-main);
      padding-left: 16px;
      position: relative;
      margin-bottom: 4px;
    }

    .card ul li::before {
      content: "•";
      position: absolute;
      left: 4px;
      color: var(--primary);
    }

    /* Working Principle */
    .principle-box {
      border-radius: var(--radius-lg);
      background: var(--bg-light);
      padding: 16px 14px;
      border: 1px solid rgba(12, 122, 196, 0.1);
      font-size: 13px;
      color: var(--text-main);
    }

    .principle-inline {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 999px;
      background: rgba(24, 194, 156, 0.08);
      font-size: 11px;
      margin-left: 4px;
      color: var(--accent);
      font-weight: 600;
    }

    /* Specs Table */
    .specs-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      margin-top: 8px;
    }

    .specs-table tr:nth-child(odd) {
      background: #f9fbff;
    }

    .specs-table td {
      padding: 8px 8px;
      border-bottom: 1px solid #edf0f7;
      vertical-align: top;
    }

    .specs-table td:first-child {
      width: 40%;
      font-weight: 600;
      color: #111827;
    }

    /* Wavelengths */
    .wavelength-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      border-radius: 999px;
      border: 1px solid rgba(24, 194, 156, 0.3);
      padding: 4px 8px;
      font-size: 11px;
      margin: 3px 4px 3px 0;
      background: #ffffff;
    }

    .wavelength-tag span {
      font-weight: 700;
    }

    /* Before / After */
    .before-after {
      display: grid;
      gap: 14px;
      font-size: 13px;
    }

    @media (min-width: 600px) {
      .before-after {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    .ba-label {
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 4px;
      color: #111827;
    }

    .placeholder-box {
      border-radius: 12px;
      border: 1px dashed #cbd5f5;
      background: #f5f7ff;
      padding: 12px;
      text-align: center;
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #e5e7f1;
      padding: 10px 0;
    }

    .faq-q {
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 4px;
      color: #111827;
    }

    .faq-a {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* FOOTER CTA */
    .footer-cta {
      border-radius: 18px;
      background: linear-gradient(135deg, #0c7ac4, #055489);
      padding: 18px 16px;
      color: #ffffff;
      display: grid;
      gap: 12px;
      margin-bottom: 12px;
    }

    @media (min-width: 768px) {
      .footer-cta {
        grid-template-columns: 2fr 1fr;
        align-items: center;
        padding: 20px 22px;
      }
    }

    .footer-cta h2 {
      font-size: 18px;
      margin-bottom: 4px;
    }

    .footer-cta p {
      font-size: 13px;
      opacity: 0.9;
    }

    .footer-cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: flex-start;
    }

    .footer-cta .btn-primary {
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
    }

    .footer-cta .btn-outline {
      border-color: rgba(255, 255, 255, 0.5);
      color: #ffffff;
      background: transparent;
    }

    .contact-mini {
      font-size: 12px;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 24px;
    }