/* CSS Variables & Global Resets */
    :root {
      --bg-color: #f1f4ff;
      --card-bg: #ffffff;
      --text-main: #2b3144;
      --text-muted: #647087;
      --accent: #4a6fa5;
      --accent-soft: #e3ebfc;
      --border-color: rgba(90, 114, 160, 0.14);
      --shadow-sm: 0 4px 14px rgba(43, 49, 68, 0.05);
      --shadow-md: 0 10px 28px rgba(43, 49, 68, 0.08);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --max-width: 1120px;
    }

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

    body {
      background-color: var(--bg-color);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      padding-bottom: 60px;
    }

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

    /* Header / Hero Section */
    .hero {
      text-align: center;
      padding: 48px 20px 32px;
    }

    .badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--accent);
      background: var(--accent-soft);
      padding: 6px 16px;
      border-radius: 30px;
      margin-bottom: 16px;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto 32px;
    }

    /* Key Specs Highlights */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-bottom: 48px;
    }

    .highlight-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .highlight-card h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* Section Styling */
    .section {
      margin-bottom: 56px;
    }

    .section-header {
      text-align: center;
      margin-bottom: 28px;
    }

    .section-tag {
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .section-title {
      font-size: 26px;
      font-weight: 750;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 580px;
      margin: 0 auto;
    }

    /* Image Gallery Grid - Responsive Two-Column Layout */
    .image-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 22px;
    }

    /* Image Gallery Grid - 3 Column Layout */
    .image-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    /* Image Card Component */
    .product-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .image-wrapper {
      position: relative;
      width: 100%;
      padding-top: 100%; /* 1:1 Aspect Ratio Box */
      background: #f7f9fe;
      overflow: hidden;
    }

    .image-wrapper img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .card-info {
      padding: 18px 20px;
      background: var(--card-bg);
      border-top: 1px solid rgba(90, 114, 160, 0.08);
      flex-grow: 1;
    }

    .card-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .card-caption {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Feature Banner (Side-by-Side Story Box) */
    .story-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 48px;
      box-shadow: var(--shadow-sm);
    }

    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .story-content h3 {
      font-size: 24px;
      font-weight: 750;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .story-content p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .story-list {
      list-style: none;
    }

    .story-list li {
      position: relative;
      padding-left: 24px;
      margin-bottom: 10px;
      font-size: 14px;
      color: var(--text-main);
      font-weight: 500;
    }

    .story-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--accent);
      font-weight: 800;
    }

    /* FAQ Section */
    .faq-section {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px 36px;
      margin-top: 48px;
      box-shadow: var(--shadow-sm);
    }

    .faq-list {
      margin-top: 28px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      background: #fafbff;
      transition: background-color 0.2s ease;
    }

    .faq-item details {
      width: 100%;
    }

    .faq-item summary {
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 650;
      color: var(--text-main);
      cursor: pointer;
      list-style: none;
      position: relative;
      padding-right: 48px;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 20px;
      font-weight: 400;
      color: var(--accent);
      transition: transform 0.2s ease;
    }

    .faq-item details[open] summary::after {
      content: "−";
      transform: translateY(-50%);
    }

    .faq-answer {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Footer Note (Static & Non-Interactive) */
    .footer-note {
      text-align: center;
      padding: 36px 20px 16px;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid rgba(90, 114, 160, 0.12);
      margin-top: 48px;
    }

    /* Mobile Responsive Optimizations */
    @media (max-width: 900px) {
      .hero-title {
        font-size: 30px;
      }
      .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .image-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .story-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
    }

    @media (max-width: 640px) {
      .hero {
        padding: 36px 12px 24px;
      }
      .hero-title {
        font-size: 25px;
      }
      .hero-subtitle {
        font-size: 14px;
      }
      .highlights-grid {
        grid-template-columns: 1fr;
      }
      .image-grid-2 {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .image-grid-3 {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .faq-section {
        padding: 28px 18px;
      }
      .card-info {
        padding: 14px 16px;
      }
    }