.container { max-width: 100%; }

*, *::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; }

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

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 60%, #1a6baa 100%);
  color: #fff;
  padding: 56px 40px 48px;
  border-radius: 16px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 280px; height: 280px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.hero-badge {
  display: inline-block;
  background: var(--gold);
  color: var(--blue-dark);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--sans);
  font-size: 36px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
}
.hero p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 0;
}
.hero-meta {
  display: flex;
  gap: 24px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.hero-meta span {
  font-family: var(--sans);
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── 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 { margin-bottom: 56px; }
hr.section-hr { border: none; border-top: 1px solid var(--gray-200); margin: 48px 0; }

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); }

/* ── Learn 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;
}

/* ── 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; }

/* ── Steps ── */
.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: 900;
  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: 16px; margin: 0; }

/* ── Trade Example ── */
.trade-example {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 24px 28px;
  margin: 24px 0;
}
.trade-example h4 { font-family: var(--sans); font-size: 16px; font-weight: 700; color: var(--blue-dark); margin-bottom: 16px; }
.trade-step { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 12px; }
.trade-step:last-child { margin-bottom: 0; }
.trade-arrow { color: var(--blue-mid); font-size: 20px; font-weight: 900; flex-shrink: 0; margin-top: 1px; }
.trade-text { font-size: 16px; line-height: 1.55; }

/* ── Pros/Cons ── */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 24px 0; }
.pros, .cons {
  background: #fff;
  border-radius: 12px;
  padding: 22px 24px;
  border: 1px solid var(--gray-200);
}
.pros { border-top: 4px solid var(--green); }
.cons { border-top: 4px solid var(--red); }
.pros h4, .cons h4 { font-family: var(--sans); font-size: 15px; font-weight: 800; margin-bottom: 14px; }
.pros h4 { color: var(--green-dark); }
.cons h4 { color: var(--red-dark); }
.pros ul, .cons ul { padding-left: 18px; }
.pros ul li, .cons ul li { font-size: 14px; line-height: 1.6; margin-bottom: 7px; }

/* ── CTA Box ── */
.cta-box {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
  border-radius: 16px;
  padding: 40px 36px;
  text-align: center;
  color: #fff;
  margin: 48px 0;
}
.cta-box h3 { font-family: var(--sans); font-size: 24px; font-weight: 800; margin-bottom: 12px; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,0.85); max-width: 520px; 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); }

/* ── Highlight Card ── */
.highlight-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-left: 5px solid var(--gold);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  margin: 24px 0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.highlight-card h4 { font-family: var(--sans); font-size: 16px; font-weight: 800; color: var(--gold-dark); margin-bottom: 8px; }
.highlight-card p { font-size: 15px; margin: 0; color: var(--gray-700); }

/* ── Strategy Box ── */
.strategy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 24px 0; }
.strategy-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 20px 22px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  transition: box-shadow 0.2s;
}
.strategy-card:hover { box-shadow: 0 4px 16px rgba(27,79,138,0.1); }
.strategy-card h4 { font-family: var(--sans); font-size: 15px; font-weight: 800; color: var(--blue-dark); margin-bottom: 10px; }
.strategy-card p { font-size: 14px; color: var(--gray-700); margin: 0; line-height: 1.6; }
.strategy-tag {
  display: inline-block;
  background: var(--blue-pale);
  color: var(--blue-mid);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

@media (max-width: 640px) {
  .hero { padding: 40px 20px 36px; }
  .hero h1 { font-size: 26px; }
  h2.section-title { font-size: 21px; }
  .step { flex-direction: column; gap: 12px; }
  .pros-cons { grid-template-columns: 1fr; }
  .strategy-grid { grid-template-columns: 1fr; }
}