:root {
      --bg-color: #f1f4ff;
      --card-bg: #ffffff;
      --text-main: #1a1c24;
      --text-muted: #5e6478;
      --accent: #2c324a;
      --border-color: rgba(44, 50, 74, 0.08);
      --shadow-sm: 0 4px 12px rgba(26, 28, 36, 0.04);
      --shadow-md: 0 8px 24px rgba(26, 28, 36, 0.06);
      --radius-lg: 16px;
      --radius-md: 12px;
    }

    * {
      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: 0;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 40px 20px 80px;
    }

    /* Hero / Header Section */
    .header-section {
      text-align: center;
      margin-bottom: 50px;
    }

    .tag-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(44, 50, 74, 0.06);
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      border-radius: 20px;
      margin-bottom: 16px;
    }

    .main-title {
      font-size: 2.5rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.2;
    }

    .sub-title {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto;
      font-weight: 400;
    }

    /* Section Title */
    .section-header {
      margin-top: 60px;
      margin-bottom: 24px;
      text-align: left;
    }

    .section-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* Image Gallery Grid (3 columns on desktop, responsive) */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

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

    .image-wrapper {
      position: relative;
      width: 100%;
      padding-top: 100%; /* 1:1 Aspect Ratio */
      background: #f7f9ff;
      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 22px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .card-category {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    .card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
    }

    .card-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Feature Specs Grid */
    .specs-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin: 40px 0;
    }

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

    .spec-num {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .spec-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* FAQ Section */
    .faq-container {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 50px;
    }

    .faq-heading {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 24px;
      color: var(--text-main);
      text-align: center;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .faq-item {
      padding: 20px 24px;
      background: #fafbff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .faq-question {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .faq-answer {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Footer Note */
    .footer-note {
      text-align: center;
      margin-top: 60px;
      font-size: 0.85rem;
      color: var(--text-muted);
      letter-spacing: 0.02em;
    }

    /* Responsive Breakpoints */
    @media (max-width: 992px) {
      .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .specs-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .main-title {
        font-size: 2.1rem;
      }
    }

    @media (max-width: 600px) {
      .container {
        padding: 24px 14px 60px;
      }
      .gallery-grid {
        grid-template-columns: 1fr;
        gap: 18px;
      }
      .specs-grid {
        grid-template-columns: 1fr;
        gap: 12px;
      }
      .faq-container {
        padding: 24px 18px;
      }
      .main-title {
        font-size: 1.7rem;
      }
      .sub-title {
        font-size: 0.95rem;
      }
    }