.container {
        max-width: 90%;
    }
  /* ── Reset & Base ── */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --blue-dark:  #0A2540;
    --blue-mid:   #1B4F8A;
    --blue-light: #2E6DB4;
    --blue-pale:  #EFF6FF;
    --gold:       #F59E0B;
    --gold-dark:  #B45309;
    --green:      #22C55E;
    --green-dark: #15803D;
    --green-pale: #F0FDF4;
    --red:        #EF4444;
    --red-dark:   #B91C1C;
    --red-pale:   #FFF1F2;
    --yellow-pale:#FFFBEB;
    --gray-100:   #F8FAFC;
    --gray-200:   #E2E8F0;
    --gray-500:   #64748B;
    --gray-700:   #334155;
    --gray-900:   #0F172A;
    --text:       #1E293B;
    --serif:      Georgia, 'Times New Roman', serif;
    --sans:       'Segoe UI', system-ui, -apple-system, sans-serif;
  }

  html { scroll-behavior: smooth; }

  body {
    font-size: 17px;
    color: var(--text);
    background: #FAFBFC;
  }

  /* ── Layout ── */
  .page-wrap {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px 14px 30px;
    line-height: 1.8;
  }

    /* ── TOC ── */
  .toc {
    background: var(--blue-pale);
    border: 1px solid #BFDBFE;
    border-left: 4px solid var(--blue-mid);
    border-radius: 0 10px 10px 0;
    padding: 24px 28px;
    margin: 40px 0;
  }
  .toc h2 {
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--blue-mid);
    margin-bottom: 14px;
  }
  .toc ol { padding-left: 20px; }
  .toc li { margin-bottom: 6px; }
  .toc a {
    color: var(--blue-light);
    text-decoration: none;
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.15s;
  }
  .toc a:hover { color: var(--blue-dark); text-decoration: underline; }

  /* ── Article Body ── */
  .article-body { padding-top: 12px; }

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

  h2.section-title {
    font-family: var(--sans);
    font-size: 26px;
    font-weight: 800;
    color: var(--blue-dark);
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: 10px;
    margin-bottom: 22px;
    line-height: 1.3;
  }
  h2.section-title .num {
    color: var(--blue-mid);
    font-size: 20px;
    margin-right: 6px;
  }

  h3.sub-title {
    font-family: var(--sans);
    font-size: 19px;
    font-weight: 700;
    color: var(--blue-light);
    margin: 28px 0 12px;
  }

  p { margin-bottom: 18px; }
  p:last-child { margin-bottom: 0; }

  strong { color: var(--blue-dark); }

  /* ── Callout Boxes ── */
  .callout {
    display: flex;
    gap: 14px;
    padding: 18px 20px;
    border-radius: 10px;
    margin: 28px 0;
    border-left: 5px solid;
  }
  .callout-icon { font-size: 22px; flex-shrink: 0; line-height: 1; margin-top: 2px; }
  .callout-body { flex: 1; }
  .callout-label {
    font-family: var(--sans);
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 5px;
  }
  .callout p { font-size: 15px; line-height: 1.65; margin: 0; color: var(--gray-700); }

  .callout.tip   { background: var(--yellow-pale); border-color: var(--gold); }
  .callout.tip   .callout-label { color: var(--gold-dark); }
  .callout.info  { background: var(--blue-pale); border-color: var(--blue-mid); }
  .callout.info  .callout-label { color: var(--blue-mid); }
  .callout.warn  { background: var(--red-pale); border-color: var(--red); }
  .callout.warn  .callout-label { color: var(--red-dark); }
  .callout.success { background: var(--green-pale); border-color: var(--green); }
  .callout.success .callout-label { color: var(--green-dark); }

  /* ── Highlight intro box ── */
  .learn-box {
    background: var(--green-pale);
    border: 1px solid #BBF7D0;
    border-left: 5px solid var(--green);
    border-radius: 0 10px 10px 0;
    padding: 18px 22px;
    margin: 32px 0 40px;
    font-family: var(--sans);
    font-size: 14px;
    color: var(--gray-700);
  }
  .learn-box strong { color: var(--green-dark); }

  /* ── Lists ── */
  ul.styled, ol.styled {
    padding-left: 0;
    list-style: none;
    margin-bottom: 18px;
  }
  ul.styled li, ol.styled li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-200);
    font-size: 16px;
    line-height: 1.6;
  }
  ul.styled li:last-child, ol.styled li:last-child { border-bottom: none; }
  ul.styled li::before {
    content: '•';
    color: var(--blue-mid);
    font-size: 20px;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
  }
  ol.styled { counter-reset: item; }
  ol.styled li { counter-increment: item; }
  ol.styled li::before {
    content: counter(item);
    background: var(--blue-mid);
    color: #fff;
    font-family: var(--sans);
    font-size: 12px;
    font-weight: 800;
    width: 24px; height: 24px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    margin-top: 3px;
  }

  /* ── Glossary Table ── */
  .table-wrap {
    overflow-x: auto;
    margin: 24px 0 32px;
    border-radius: 12px;
    box-shadow: 0 1px 8px rgba(0,0,0,0.07);
  }
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    font-family: var(--sans);
  }
  thead tr {
    background: var(--blue-mid);
    color: #fff ;
  }
  thead th {
    padding: 13px 18px;
    text-align: left;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    color: #fff ! important;
  }
  tbody tr { background: #fff; transition: background 0.12s; }
  tbody tr:nth-child(even) { background: var(--gray-100); }
  tbody tr:hover { background: var(--blue-pale); }
  td { padding: 12px 18px; border-bottom: 1px solid var(--gray-200); line-height: 1.5; }
  td:first-child { font-weight: 700; color: var(--blue-dark); white-space: nowrap; }

  /* ── Step cards ── */
  .steps { margin: 24px 0; }
  .step {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 22px 24px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    transition: box-shadow 0.2s;
  }
  .step:hover { box-shadow: 0 4px 16px rgba(27,79,138,0.1); }
  .step-num {
    background: var(--blue-mid);
    color: #fff;
    font-family: var(--sans);
    font-size: 18px;
    font-weight: 800;
    width: 44px; height: 44px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
  }
  .step-body h3 {
    font-family: var(--sans);
    font-size: 17px;
    font-weight: 700;
    color: var(--blue-dark);
    margin-bottom: 8px;
  }
  .step-body p { font-size: 15px; line-height: 1.65; margin: 0; color: var(--gray-700); }

  /* ── Trade Example ── */
  .trade-example {
    background: var(--gray-900);
    color: #E2E8F0;
    border-radius: 12px;
    padding: 28px 30px;
    margin: 28px 0;
    font-family: var(--sans);
    font-size: 15px;
  }
  .trade-example h4 {
    color: #FCD34D;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 18px;
    font-weight: 700;
  }
  .trade-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }
  .trade-step:last-child { border-bottom: none; }
  .trade-arrow { color: #FCD34D; font-size: 16px; flex-shrink: 0; margin-top: 2px; }
  .trade-text strong { color: #93C5FD; }

  /* ── Pros Cons ── */
  .pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 20px 0;
  }
  @media (max-width: 600px) { .pros-cons { grid-template-columns: 1fr; } }
  .pros, .cons {
    border-radius: 12px;
    padding: 20px 22px;
  }
  .pros { background: var(--green-pale); border: 1px solid #BBF7D0; }
  .cons { background: var(--red-pale); border: 1px solid #FECACA; }
  .pros h4, .cons h4 {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 14px;
  }
  .pros h4 { color: var(--green-dark); }
  .cons h4 { color: var(--red-dark); }
  .pros li, .cons li {
    font-family: var(--sans);
    font-size: 14px;
    padding: 5px 0;
    list-style: none;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    display: flex; gap: 8px;
    line-height: 1.5;
  }
  .pros li:last-child, .cons li:last-child { border-bottom: none; }
  .pros li::before { content: '✓'; color: var(--green-dark); font-weight: 800; flex-shrink: 0; }
  .cons li::before { content: '✗'; color: var(--red-dark); font-weight: 800; flex-shrink: 0; }

  /* ── Divider ── */
  hr.section-hr { border: none; border-top: 1px solid var(--gray-200); margin: 48px 0; }

  /* ── CTA ── */
  .cta-box {
    background: linear-gradient(135deg, var(--blue-dark), #0D3461);
    border-radius: 16px;
    padding: 40px 36px;
    text-align: center;
    margin: 48px 0 0;
    color: #fff;
  }
  .cta-box h2 {
    font-family: var(--sans);
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
    color: #fff;
  }
  .cta-box p {
    color: rgba(255,255,255,0.75);
    font-size: 16px;
    max-width: 500px;
    margin: 0 auto 24px;
  }
  .cta-btn {
    display: inline-block;
    background: var(--gold);
    color: var(--blue-dark);
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 800;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.15s, transform 0.1s;
  }
  .cta-btn:hover { background: #FBBF24; transform: translateY(-1px); }

  /* ── FAQ ── */
  .faq { margin: 48px 0 0; }
  .faq-title {
    font-family: var(--sans);
    font-size: 26px;
    font-weight: 800;
    color: var(--blue-dark);
    border-bottom: 2px solid var(--gray-200);
    padding-bottom: 10px;
    margin-bottom: 24px;
  }
  .faq-item {
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  }
  .faq-q {
    width: 100%;
    background: none;
    border: none;
    padding: 18px 22px;
    text-align: left;
    font-family: var(--sans);
    font-size: 16px;
    font-weight: 700;
    color: var(--blue-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    transition: background 0.15s;
  }
  .faq-q:hover { background: var(--blue-pale); }
  .faq-q.open { background: var(--blue-pale); color: var(--blue-mid); }
  .faq-icon {
    font-size: 20px;
    color: var(--blue-mid);
    flex-shrink: 0;
    transition: transform 0.25s;
    font-style: normal;
  }
  .faq-q.open .faq-icon { transform: rotate(45deg); }
  .faq-a {
    display: none;
    padding: 0 22px 18px;
    font-size: 16px;
    line-height: 1.75;
    color: var(--gray-700);
    border-top: 1px solid var(--gray-200);
    padding-top: 16px;
  }
  .faq-a.open { display: block; }
  .faq-a strong { color: var(--blue-dark); }

  /* ── Responsive ── */
  @media (max-width: 640px) {
    .hero { padding: 40px 20px 36px; }
    h2.section-title { font-size: 21px; }
    .step { flex-direction: column; gap: 12px; }
  }