/* Global Reset & Theme Variables */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    :root {
      --bg-main: #f1f4ff;
      --card-bg: #ffffff;
      --text-main: #1e2235;
      --text-muted: #5e6582;
      --accent-soft: #dce4ff;
      --border-color: #e2e8fa;
      --radius-lg: 16px;
      --radius-md: 12px;
      --shadow-soft: 0 10px 25px -5px rgba(30, 34, 53, 0.05), 0 8px 10px -6px rgba(30, 34, 53, 0.03);
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      padding: 24px 16px 64px;
    }

    .container {
      max-width: 960px;
      margin: 0 auto;
    }

    /* Header Section */
    .header-banner {
      text-align: center;
      padding: 32px 20px 40px;
    }

    .header-tag {
      display: inline-block;
      text-transform: uppercase;
      font-size: 0.75rem;
      letter-spacing: 0.15em;
      font-weight: 700;
      color: #3b5088;
      background: #e2e8fd;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
    }

    .header-title {
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: #171b2d;
      margin-bottom: 12px;
    }

    .header-subtitle {
      font-size: clamp(0.95rem, 2vw, 1.1rem);
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto;
    }

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

    .section-header {
      margin-bottom: 24px;
      text-align: center;
    }

    .section-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: #1a1e30;
      letter-spacing: -0.01em;
      margin-bottom: 6px;
    }

    .section-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Responsive Image Grids */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .grid-1 {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }

    @media (max-width: 640px) {
      .grid-2 {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      body {
        padding: 16px 12px 48px;
      }
      .header-banner {
        padding: 24px 12px 32px;
      }
    }

    /* Visual Showcase Card */
    .showcase-card {
      background-color: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
    }

    .showcase-media {
      position: relative;
      width: 100%;
      padding-top: 100%; /* Strict 1:1 Aspect Ratio Box */
      background-color: var(--bg-main);
      overflow: hidden;
    }

    .showcase-media img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .showcase-card:hover .showcase-media img {
      transform: scale(1.02);
    }

    .showcase-body {
      padding: 18px 20px 22px;
      background: #ffffff;
      flex-grow: 1;
    }

    .card-category {
      font-size: 0.75rem;
      text-transform: uppercase;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: #556799;
      margin-bottom: 4px;
    }

    .card-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #171b2d;
      margin-bottom: 6px;
      line-height: 1.3;
    }

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

    /* Specification Pill Bar */
    .spec-bar {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      margin-bottom: 56px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      text-align: center;
      box-shadow: var(--shadow-soft);
    }

    @media (max-width: 640px) {
      .spec-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px 12px;
      }
    }

    .spec-item-label {
      font-size: 0.75rem;
      text-transform: uppercase;
      color: var(--text-muted);
      letter-spacing: 0.05em;
      margin-bottom: 4px;
    }

    .spec-item-value {
      font-size: 1rem;
      font-weight: 700;
      color: #171b2d;
    }

    /* FAQ Section */
    .faq-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-soft);
    }

    .faq-title-wrap {
      text-align: center;
      margin-bottom: 28px;
    }

    .faq-main-title {
      font-size: 1.5rem;
      font-weight: 800;
      color: #171b2d;
      margin-bottom: 6px;
    }

    .faq-subtitle {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

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

    .faq-item:hover {
      border-color: #ccd7f5;
    }

    .faq-item summary {
      padding: 16px 20px;
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: #171b2d;
    }

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

    .faq-item summary::after {
      content: '+';
      font-size: 1.2rem;
      font-weight: 400;
      color: #556799;
      transition: transform 0.2s ease;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
      color: #171b2d;
    }

    .faq-answer {
      padding: 0 20px 18px 20px;
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid rgba(226, 232, 250, 0.5);
      margin-top: 4px;
      padding-top: 12px;
    }

    /* Footer Note */
    .page-footer {
      text-align: center;
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid #e1e7f8;
      font-size: 0.82rem;
      color: #79829e;
    }