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

    :root {
      --silver: #6B7280;
      --silver-light: #F3F4F6;
      --silver-mid: #E5E7EB;
      --blue: #1D4ED8;
      --blue-light: #EFF6FF;
      --blue-mid: #BFDBFE;
      --ink: #111827;
      --ink-mid: #374151;
      --ink-muted: #6B7280;
      --surface: #FFFFFF;
      --surface-alt: #F9FAFB;
      --border: #E5E7EB;
      --border-strong: #D1D5DB;
      --green: #166534;
      --green-light: #F0FDF4;
      --radius: 8px;
    }

    html { font-size: 16px; scroll-behavior: smooth; }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
      color: var(--ink);
      background: var(--surface);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    /* ── Layout ── */
    .container { max-width: 880px; margin: 0 auto; padding: 0 1.5rem; }
    .section { padding: 3.5rem 0; }
    .section + .section { border-top: 1px solid var(--border); }

    /* ── Breadcrumb ── */
    .breadcrumb {
      background: var(--surface-alt);
      border-bottom: 1px solid var(--border);
      padding: 0.6rem 0;
      font-size: 0.78rem;
      color: var(--ink-muted);
    }
    .breadcrumb a { color: var(--ink-muted); text-decoration: none; }
    .breadcrumb a:hover { color: var(--blue); text-decoration: underline; }
    .breadcrumb span { margin: 0 0.4rem; }

    /* ── Hero ── */
    .hero { padding: 3rem 0 2.5rem; border-bottom: 1px solid var(--border); }

    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--blue);
      background: var(--blue-light);
      border: 1px solid var(--blue-mid);
      padding: 0.28rem 0.75rem;
      border-radius: 99px;
      margin-bottom: 1.1rem;
    }

    .hero h1 {
      font-size: clamp(1.7rem, 4vw, 2.5rem);
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.025em;
      color: var(--ink);
      margin-bottom: 0.9rem;
    }
    .hero h1 em { font-style: normal; color: var(--blue); }

    .hero-sub {
      font-size: 1.02rem;
      color: var(--ink-mid);
      max-width: 640px;
      margin-bottom: 1.8rem;
      line-height: 1.75;
    }

    /* Trust bar */
    .trust-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem 1.4rem;
      font-size: 0.81rem;
      color: var(--ink-mid);
      margin-bottom: 2rem;
    }
    .trust-item { display: flex; align-items: center; gap: 0.35rem; }
    .trust-dot {
      width: 6px; height: 6px;
      border-radius: 50%;
      background: var(--green);
      flex-shrink: 0;
    }

    /* CTA row */
    .btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
    .btn-primary {
      display: inline-block;
      background: var(--blue);
      color: #fff;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 0.7rem 1.6rem;
      border-radius: var(--radius);
      text-decoration: none;
      transition: background 0.15s;
    }
    .btn-primary:hover { background: #1e40af; }
    .btn-secondary {
      display: inline-block;
      background: transparent;
      color: var(--ink);
      font-weight: 500;
      font-size: 0.9rem;
      padding: 0.7rem 1.5rem;
      border-radius: var(--radius);
      border: 1.5px solid var(--border-strong);
      text-decoration: none;
      transition: border-color 0.15s;
    }
    .btn-secondary:hover { border-color: var(--ink-muted); }

    /* ── Spec grid ── */
    .specs-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
      gap: 1px;
      background: var(--border);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .spec-cell { background: var(--surface); padding: 1rem 1.25rem; }
    .spec-label {
      font-size: 0.7rem;
      font-weight: 600;
      letter-spacing: 0.09em;
      text-transform: uppercase;
      color: var(--ink-muted);
      margin-bottom: 0.3rem;
    }
    .spec-val { font-size: 0.95rem; font-weight: 600; color: var(--ink); }

    /* ── Section headings ── */
    .section-heading {
      font-size: 1.4rem;
      font-weight: 700;
      letter-spacing: -0.015em;
      color: var(--ink);
      margin-bottom: 0.45rem;
    }
    .section-sub {
      font-size: 0.9rem;
      color: var(--ink-muted);
      margin-bottom: 1.75rem;
    }

    /* ── Feature cards ── */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
    }
    .feature-card {
      background: var(--surface-alt);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.25rem 1.3rem;
    }
    .feature-card h3 {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 0.4rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .feature-icon {
      width: 28px; height: 28px;
      background: var(--silver-light);
      border-radius: 6px;
      display: flex; align-items: center; justify-content: center;
      font-size: 0.85rem;
      flex-shrink: 0;
    }
    .feature-card p { font-size: 0.83rem; color: var(--ink-mid); line-height: 1.6; }

    /* ── Application use case strip ── */
    .use-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 1rem;
    }
    .use-pill {
      background: var(--silver-light);
      border: 1px solid var(--silver-mid);
      color: var(--ink-mid);
      font-size: 0.8rem;
      font-weight: 500;
      padding: 0.3rem 0.85rem;
      border-radius: 99px;
    }

    /* ── QC process ── */
    .qc-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1rem;
    }
    .qc-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.1rem 1.25rem;
    }
    .qc-step {
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--blue);
      margin-bottom: 0.35rem;
    }
    .qc-card h3 { font-size: 0.88rem; font-weight: 600; color: var(--ink); margin-bottom: 0.3rem; }
    .qc-card p { font-size: 0.8rem; color: var(--ink-mid); line-height: 1.55; }

    /* ── Ordering process ── */
    .order-steps { display: flex; flex-direction: column; }
    .order-step {
      display: flex;
      gap: 1.2rem;
      padding: 1.2rem 0;
      border-bottom: 1px solid var(--border);
    }
    .order-step:last-child { border-bottom: none; }
    .order-num {
      flex-shrink: 0;
      width: 30px; height: 30px;
      background: var(--ink);
      color: #fff;
      border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      font-size: 0.78rem;
      font-weight: 700;
      margin-top: 2px;
    }
    .order-body h3 { font-size: 0.93rem; font-weight: 600; color: var(--ink); margin-bottom: 0.25rem; }
    .order-body p { font-size: 0.83rem; color: var(--ink-mid); line-height: 1.6; }

    /* ── Compatibility table ── */
    .compat-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
    .compat-table th {
      text-align: left;
      font-size: 0.69rem;
      font-weight: 700;
      letter-spacing: 0.09em;
      text-transform: uppercase;
      color: var(--ink-muted);
      padding: 0.65rem 1rem;
      background: var(--surface-alt);
      border-bottom: 1px solid var(--border);
    }
    .compat-table td {
      padding: 0.72rem 1rem;
      border-bottom: 1px solid var(--border);
      color: var(--ink-mid);
      vertical-align: top;
    }
    .compat-table td:first-child { font-weight: 600; color: var(--ink); }
    .compat-table tr:last-child td { border-bottom: none; }
    .compat-wrap {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
    }

    /* ── Color options ── */
    .color-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1rem; }
    .color-swatch {
      display: flex;
      align-items: center;
      gap: 0.55rem;
      background: var(--surface-alt);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 0.55rem 0.9rem;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--ink-mid);
    }
    .dot {
      width: 14px; height: 14px;
      border-radius: 50%;
      border: 1px solid rgba(0,0,0,0.15);
      flex-shrink: 0;
    }

    /* ── Payment & shipping ── */
    .info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
    .info-box {
      background: var(--surface-alt);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.2rem 1.3rem;
    }
    .info-box h3 { font-size: 0.88rem; font-weight: 700; color: var(--ink); margin-bottom: 0.6rem; }
    .info-box p, .info-box li {
      font-size: 0.82rem;
      color: var(--ink-mid);
      line-height: 1.65;
    }
    .info-box ul { list-style: none; }
    .info-box li { display: flex; align-items: flex-start; gap: 0.4rem; padding: 2px 0; }
    .info-box li::before { content: "–"; color: var(--ink-muted); flex-shrink: 0; }

    /* ── FAQ ── */
    details { border-bottom: 1px solid var(--border); }
    details:first-of-type { border-top: 1px solid var(--border); }
    summary {
      font-size: 0.93rem;
      font-weight: 600;
      color: var(--ink);
      padding: 1.1rem 0;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
    }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: '+'; font-size: 1rem; font-weight: 400; color: var(--ink-muted); flex-shrink: 0; }
    details[open] summary::after { content: '−'; }
    .faq-answer { font-size: 0.86rem; color: var(--ink-mid); line-height: 1.8; padding-bottom: 1.1rem; max-width: 700px; }

    /* ── CTA block ── */
    .cta-block {
      background: var(--ink);
      color: #fff;
      border-radius: 12px;
      padding: 2.5rem 2rem;
      text-align: center;
    }
    .cta-block h2 { font-size: 1.35rem; font-weight: 700; margin-bottom: 0.6rem; }
    .cta-block p { font-size: 0.88rem; color: rgba(255,255,255,0.6); margin-bottom: 1.5rem; max-width: 500px; margin-left: auto; margin-right: auto; }
    .btn-cta {
      display: inline-block;
      background: #fff;
      color: var(--ink);
      font-weight: 700;
      font-size: 0.9rem;
      padding: 0.75rem 1.8rem;
      border-radius: var(--radius);
      text-decoration: none;
      transition: background 0.15s;
    }
    .btn-cta:hover { background: #F3F4F6; }
    .cta-sub { margin-top: 1rem; font-size: 0.8rem; color: rgba(255,255,255,0.45); margin-bottom: 0 !important; }

    /* ── Prose ── */
    .prose p { font-size: 0.9rem; color: var(--ink-mid); line-height: 1.8; margin-bottom: 0.85rem; }
    .prose p:last-child { margin-bottom: 0; }
    .prose h3 { font-size: 1.02rem; font-weight: 700; color: var(--ink); margin: 1.4rem 0 0.5rem; }

    /* ── Industry statistics ── */
    .stat-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 1rem;
    }
    .stat-card {
      background: var(--blue-light);
      border: 1px solid var(--blue-mid);
      border-radius: var(--radius);
      padding: 1.4rem 1.3rem;
    }
    .stat-num { font-size: 1.85rem; font-weight: 800; color: var(--blue); line-height: 1.1; letter-spacing: -0.02em; }
    .stat-label { font-size: 0.82rem; color: var(--ink-mid); line-height: 1.55; margin-top: 0.4rem; }

    /* ── Manufacturing process flow ── */
    .flow {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      align-items: stretch;
    }
    .flow-step {
      flex: 1 1 140px;
      background: var(--surface-alt);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 0.9rem 1rem;
      position: relative;
    }
    .flow-step .flow-n {
      font-size: 0.65rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--blue);
      display: block;
      margin-bottom: 0.3rem;
    }
    .flow-step h3 { font-size: 0.85rem; font-weight: 600; color: var(--ink); margin-bottom: 0.2rem; }
    .flow-step p { font-size: 0.76rem; color: var(--ink-mid); line-height: 1.5; }

    /* ── Comparison table ── */
    .vs-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
    .vs-table th {
      text-align: left;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 0.7rem 1rem;
      background: var(--surface-alt);
      border-bottom: 1px solid var(--border);
      color: var(--ink-muted);
    }
    .vs-table th:nth-child(2) { color: var(--blue); }
    .vs-table td {
      padding: 0.72rem 1rem;
      border-bottom: 1px solid var(--border);
      color: var(--ink-mid);
      vertical-align: top;
    }
    .vs-table td:first-child { font-weight: 600; color: var(--ink); }
    .vs-table tr:last-child td { border-bottom: none; }
    .vs-wrap { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }

    /* ── Buyer guide checklist ── */
    .guide-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 1rem;
    }
    .guide-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-left: 3px solid var(--blue);
      border-radius: var(--radius);
      padding: 1.1rem 1.25rem;
    }
    .guide-card h3 { font-size: 0.9rem; font-weight: 700; color: var(--ink); margin-bottom: 0.3rem; }
    .guide-card p { font-size: 0.82rem; color: var(--ink-mid); line-height: 1.6; }

    /* ── Internal link cluster ── */
    .link-cluster { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }
    .link-pill {
      display: inline-block;
      background: var(--surface-alt);
      border: 1px solid var(--border);
      color: var(--blue);
      font-size: 0.82rem;
      font-weight: 500;
      padding: 0.4rem 0.9rem;
      border-radius: 99px;
      text-decoration: none;
      transition: border-color 0.15s, background 0.15s;
    }
    .link-pill:hover { border-color: var(--blue-mid); background: var(--blue-light); }

    /* ── Responsive ── */
    @media (max-width: 600px) {
      .section { padding: 2.5rem 0; }
      .hero { padding: 2rem 0 2rem; }
      .hero h1 { font-size: 1.6rem; }
      .specs-grid { grid-template-columns: 1fr 1fr; }
      .info-grid { grid-template-columns: 1fr; }
      .flow-step { flex: 1 1 100%; }
      .cta-block { padding: 2rem 1.25rem; }
    }