/* ==========================================================================
       CSS Design System & Variables
       Theme Base Canvas Color: #f1f4ff (Strictly Implemented)
       Aesthetic: Clean Fresh Editorial, Pastel Macaron Harmony, Minimalist Typography
       ========================================================================== */
    :root {
      --bg-canvas: #f1f4ff;
      --bg-surface: #ffffff;
      --bg-surface-subtle: #f8faff;
      --text-headline: #1a2438;
      --text-body: #3d4a60;
      --text-secondary: #6b7a90;
      --text-muted: #8e9bb0;
      --border-subtle: #dbe3f3;
      --border-focus: #c2d2ee;
      --accent-pastel-blue: #7ba3d8;
      --accent-pastel-mint: #7fcbb0;
      --accent-pastel-rose: #e898aa;
      --accent-navy: #1f304f;
      --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      --shadow-soft: 0 6px 24px rgba(31, 48, 79, 0.05);
      --shadow-hover: 0 12px 36px rgba(31, 48, 79, 0.09);
      --radius-card: 16px;
      --radius-sm: 8px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      background-color: var(--bg-canvas);
      color: var(--text-body);
      font-family: var(--font-stack);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1180px;
      margin: 0 auto;
      padding: 48px 20px 80px;
    }

    /* ==========================================================================
       Header & Hero Presentation
       ========================================================================== */
    .hero-header {
      text-align: center;
      margin-bottom: 52px;
      padding: 10px 16px 0;
    }

    .hero-tag {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--accent-pastel-blue);
      background: #ffffff;
      border: 1px solid var(--border-subtle);
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 18px;
      box-shadow: 0 2px 8px rgba(123, 163, 216, 0.12);
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: var(--text-headline);
      letter-spacing: -0.8px;
      line-height: 1.25;
      margin-bottom: 16px;
    }

    .hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 800px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    /* Feature Highlights Bar */
    .feature-strip {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-bottom: 56px;
    }

    .feature-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 18px 20px;
      text-align: center;
      box-shadow: var(--shadow-soft);
      transition: transform 0.25s ease;
    }

    .feature-item:hover {
      transform: translateY(-3px);
    }

    .feature-item h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-headline);
      margin-bottom: 4px;
    }

    .feature-item p {
      font-size: 12px;
      color: var(--text-secondary);
    }

    /* Section Headings */
    .section-head {
      text-align: center;
      margin: 64px 0 36px;
    }

    .section-head h2 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-headline);
      letter-spacing: -0.5px;
      margin-bottom: 8px;
    }

    .section-head p {
      font-size: 14px;
      color: var(--text-secondary);
    }

    /* ==========================================================================
       Two-Column Responsive Image Grid
       ========================================================================== */
    .image-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
      margin-bottom: 48px;
    }

    @media (max-width: 768px) {
      .image-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
    }

    .image-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .image-wrap {
      position: relative;
      width: 100%;
      padding-top: 100%; /* 1:1 Aspect Ratio */
      background: #f1f4ff;
      overflow: hidden;
    }

    .image-wrap img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: contain;
      transition: transform 0.4s ease;
    }

    .image-card:hover .image-wrap img {
      transform: scale(1.02);
    }

    .card-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(4px);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-navy);
      border: 1px solid rgba(219, 227, 243, 0.8);
      z-index: 2;
    }

    .card-body {
      padding: 20px 22px;
      background: var(--bg-surface);
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      border-top: 1px solid var(--border-subtle);
    }

    .card-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-headline);
      margin-bottom: 6px;
    }

    .card-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.55;
    }

    /* Full-width Card for Key Highlights */
    .image-card.full-width {
      grid-column: 1 / -1;
    }

    /* ==========================================================================
       Specifications Table
       ========================================================================== */
    .specs-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      margin-bottom: 60px;
      box-shadow: var(--shadow-soft);
    }

    .specs-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-headline);
      margin-bottom: 22px;
      text-align: center;
    }

    .specs-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }

    .specs-table tr {
      border-bottom: 1px solid var(--border-subtle);
    }

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

    .specs-table td {
      padding: 14px 16px;
    }

    .specs-table td:first-child {
      font-weight: 700;
      color: var(--text-headline);
      width: 32%;
      background: var(--bg-surface-subtle);
    }

    .specs-table td:last-child {
      color: var(--text-body);
    }

    /* ==========================================================================
       Interactive FAQ Accordion
       ========================================================================== */
    .faq-section {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-card);
      padding: 36px 32px;
      margin-bottom: 60px;
      box-shadow: var(--shadow-soft);
    }

    .faq-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-headline);
      margin-bottom: 24px;
      text-align: center;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-subtle);
    }

    .faq-item:last-child {
      border-bottom: none;
    }

    .faq-question {
      padding: 18px 0;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-headline);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--accent-pastel-blue);
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent-pastel-blue);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding-bottom: 18px;
    }

    /* Footer Note */
    .footer-note {
      text-align: center;
      font-size: 12px;
      color: var(--text-muted);
      padding-top: 24px;
    }