:root {
      --bg-color: #f1f4ff;
      --card-bg: #ffffff;
      --text-main: #1f2438;
      --text-muted: #5e6582;
      --accent: #4361ee;
      --accent-light: #e0e7ff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 12px rgba(31, 36, 56, 0.04);
      --shadow-md: 0 8px 24px rgba(31, 36, 56, 0.08);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 8px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    }

    body {
      background-color: var(--bg-color);
      color: var(--text-main);
      line-height: 1.6;
      padding: 0;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 24px 20px 60px;
    }

    /* Header & Hero */
    .hero-section {
      text-align: center;
      padding: 40px 20px 30px;
      margin-bottom: 30px;
    }

    .category-badge {
      display: inline-block;
      background: #e0e7ff;
      color: #3b52d4;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1.2px;
      text-transform: uppercase;
      padding: 6px 18px;
      border-radius: 30px;
      margin-bottom: 16px;
    }

    .hero-title {
      font-size: clamp(28px, 4.5vw, 44px);
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: clamp(15px, 2vw, 18px);
      color: var(--text-muted);
      max-width: 720px;
      margin: 0 auto 28px;
    }

    .feature-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-bottom: 36px;
    }

    .feature-tag {
      background: #ffffff;
      border: 1px solid #dbe2fb;
      color: #41496b;
      font-size: 13px;
      font-weight: 600;
      padding: 8px 16px;
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
    }

    /* Master Showcase Banner */
    .master-banner {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 20px;
      box-shadow: var(--shadow-md);
      margin-bottom: 50px;
      border: 1px solid #e2e8f8;
      text-align: center;
    }

    .master-banner img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      display: block;
      object-fit: cover;
    }

    .master-caption {
      margin-top: 16px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
    }

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

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

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

    .section-title {
      font-size: clamp(22px, 3vw, 30px);
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* Grids */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    /* Cards */
    .product-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 16px;
      box-shadow: var(--shadow-sm);
      border: 1px solid #e4eafc;
      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);
    }

    .img-wrapper {
      position: relative;
      width: 100%;
      padding-top: 100%;
      background: #f8faff;
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 14px;
    }

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

    .card-info {
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .card-tag {
      font-size: 11px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.8px;
      color: #4a64e8;
      margin-bottom: 4px;
    }

    .card-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
      line-height: 1.35;
    }

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

    /* Specifications Table */
    .spec-box {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid #e4eafc;
      box-shadow: var(--shadow-sm);
      margin-bottom: 56px;
    }

    .spec-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 16px;
    }

    .spec-table th, .spec-table td {
      padding: 14px 18px;
      text-align: left;
      font-size: 14px;
      border-bottom: 1px solid #edf2f7;
    }

    .spec-table th {
      width: 32%;
      font-weight: 700;
      color: var(--text-main);
      background: #f9faff;
      border-radius: var(--radius-sm);
    }

    .spec-table td {
      color: #475467;
    }

    /* FAQ Section */
    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .faq-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      border: 1px solid #e4eafc;
      box-shadow: var(--shadow-sm);
    }

    .faq-q {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .faq-q-icon {
      color: var(--accent);
      font-weight: 800;
      flex-shrink: 0;
    }

    .faq-a {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      padding-left: 24px;
    }

    /* Footer Banner */
    .footer-bar {
      margin-top: 60px;
      text-align: center;
      padding: 30px 20px;
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      border: 1px solid #e2e8f8;
      box-shadow: var(--shadow-sm);
    }

    .footer-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .footer-desc {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .container {
        padding: 16px 14px 40px;
      }
      .hero-section {
        padding: 24px 10px 20px;
      }
      .grid-4, .grid-3, .grid-2 {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .spec-box {
        padding: 18px;
      }
      .spec-table th, .spec-table td {
        padding: 10px 12px;
        font-size: 13px;
      }
      .spec-table th {
        width: 40%;
      }
    }