:root {
  color-scheme: dark;
  --void: #07090d;
  --bg: #0a0c11;
  --surface: #10131a;
  --surface-2: #151922;
  --surface-3: #1b202a;
  --ink: #f4f2ed;
  --ink-2: #c3c7d0;
  --ink-3: #8d939f;
  --ink-4: #656b77;
  --gold: #c9a55f;
  --gold-bright: #e0bd77;
  --gold-dim: rgba(201, 165, 95, 0.14);
  --gold-line: rgba(201, 165, 95, 0.32);
  --alert: #e0754f;
  --alert-dim: rgba(224, 117, 79, 0.12);
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --shell: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --section: clamp(76px, 9vw, 148px);
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
}
* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p, ul, ol, dl, dd, dt, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
dl { padding: 0; }
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}
::selection { background: var(--gold); color: #0a0c11; }
.shell {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 12px 20px;
  background: var(--gold);
  color: #0a0c11;
  font-size: 13px;
}
.skip-link:focus { left: 0; }
/* ---------- shared type ---------- */
.eyebrow {
  display: block;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.34em;
  text-transform: uppercase;
}
.section-title {
  margin-top: 22px;
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.005em;
}
.section-note {
  color: var(--ink-3);
  font-size: 15px;
  line-height: 2;
}
.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}
/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 12, 17, 0.78);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 76px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--gold-line);
  background: var(--gold-dim);
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.brand-text strong {
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.04em;
}
.brand-text small {
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.26em;
}
.brand-text small.cn {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
}
.site-nav a {
  position: relative;
  padding: 6px 0;
  color: var(--ink-2);
  font-size: 14px;
  white-space: nowrap;
  transition: color 200ms ease;
}
.site-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 260ms ease;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a:hover::after { width: 100%; }
.menu-link {
  display: none;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.1em;
}
/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 520px at 14% -8%, rgba(201, 165, 95, 0.09), transparent 62%),
    radial-gradient(760px 480px at 92% 8%, rgba(96, 124, 190, 0.10), transparent 60%),
    var(--void);
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 78px 100%;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(320px, 0.78fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
  padding-block: clamp(64px, 8vw, 132px);
}
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
  color: var(--ink-4);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.breadcrumbs a { transition: color 180ms ease; }
.breadcrumbs a:hover { color: var(--gold); }
.breadcrumbs strong { color: var(--ink-2); font-weight: 500; }
.hero h1 {
  margin-bottom: 24px;
  font-size: clamp(40px, 5.4vw, 72px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.01em;
}
.hero h1 span {
  display: block;
  margin-top: 20px;
  max-width: 16em;
  color: var(--ink-2);
  font-size: clamp(17px, 1.85vw, 25px);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.02em;
}
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  padding: 7px 16px 7px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.hero-kicker i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--gold-dim);
}
.byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-bottom: 26px;
  color: var(--ink-4);
  font-size: 12.5px;
  letter-spacing: 0.03em;
}
.byline span { display: inline-flex; align-items: center; gap: 8px; }
.byline span::before {
  content: '';
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--gold);
}
.hero-lead {
  max-width: 40em;
  margin-bottom: 42px;
  color: var(--ink-3);
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 2.05;
}
.hero-lead b { color: var(--ink-2); font-weight: 600; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  height: 54px;
  padding: 0 30px;
  border: 1px solid var(--gold);
  background: var(--gold);
  color: #0a0c11;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.05em;
  transition: background 200ms ease, color 200ms ease, transform 200ms ease;
}
.btn span { transition: transform 240ms ease; }
.btn:hover { background: var(--gold-bright); border-color: var(--gold-bright); }
.btn:hover span { transform: translateX(4px); }
.btn-ghost {
  background: transparent;
  border-color: var(--line-2);
  color: var(--ink-2);
}
.btn-ghost:hover {
  background: transparent;
  border-color: var(--gold-line);
  color: var(--gold-bright);
}
.hero-disclaimer {
  margin-top: 26px;
  color: var(--ink-4);
  font-size: 12.5px;
  letter-spacing: 0.03em;
}
/* ---------- answer panel ---------- */
.answer-panel {
  position: relative;
  padding: clamp(32px, 3.4vw, 46px);
  border: 1px solid var(--line-2);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012) 46%, transparent),
    var(--surface);
  scroll-margin-top: 96px;
}
.answer-panel::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 62px;
  height: 1px;
  background: var(--gold);
}
.answer-panel::after {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 1px;
  height: 62px;
  background: var(--gold);
}
.answer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.28em;
}
.answer-panel h2 {
  margin: 30px 0 18px;
  font-size: clamp(23px, 2.3vw, 31px);
  font-weight: 650;
  line-height: 1.42;
}
.answer-summary {
  margin-bottom: 32px;
  color: var(--ink-3);
  font-size: 14.5px;
  line-height: 2;
}
.answer-list li {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  padding: 17px 0;
  border-top: 1px solid var(--line);
}
.answer-list li span {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.18em;
}
.answer-list li p {
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.75;
}
/* ---------- attribute strip ---------- */
.strip {
  border-bottom: 1px solid var(--line);
  background: var(--void);
}
.strip ul {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.strip li {
  padding: 24px 20px;
  border-left: 1px solid var(--line);
  color: var(--ink-4);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-align: center;
}
.strip li:first-child { border-left: 0; }
.strip li b {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 550;
  letter-spacing: 0.04em;
}
/* ---------- section frame ---------- */
.section { padding-block: var(--section); }
.section[id] { scroll-margin-top: 88px; }
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.75fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: end;
  margin-bottom: clamp(48px, 5vw, 78px);
}
.section-head .section-note { padding-bottom: 8px; }
/* ---------- prose + glossary ---------- */
.prose p {
  max-width: 46em;
  margin-bottom: 22px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 2.1;
}
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.glossary {
  margin-top: 44px;
  border-top: 1px solid var(--line-2);
}
.glossary div {
  display: grid;
  grid-template-columns: minmax(150px, 0.34fr) minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.glossary dt {
  color: var(--gold-bright);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.glossary dd {
  color: var(--ink-3);
  font-size: 14px;
  line-height: 1.95;
}
/* ---------- platform records ---------- */
.records { border-top: 1px solid var(--line-2); }
.record {
  display: grid;
  grid-template-columns: 96px minmax(0, 0.85fr) minmax(0, 1.5fr) minmax(220px, 0.85fr);
  gap: clamp(20px, 3vw, 48px);
  align-items: center;
  padding: clamp(28px, 3vw, 42px) 0;
  border-bottom: 1px solid var(--line);
  transition: background 260ms ease;
}
.record:hover { background: rgba(255, 255, 255, 0.018); }
.record-index {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}
.record h3 {
  font-size: clamp(19px, 1.7vw, 24px);
  font-weight: 600;
  letter-spacing: 0.01em;
}
.record > p {
  color: var(--ink-3);
  font-size: 14.5px;
  line-height: 1.95;
}
.check-list {
  display: grid;
  gap: 12px;
}
.check-list li {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink-2);
  font-size: 13px;
}
.check-list li i {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-line);
  color: var(--gold);
  font-size: 8px;
  font-style: normal;
  line-height: 1;
}
/* ---------- poster ---------- */
.poster {
  border: 1px solid var(--line-2);
  background: var(--surface);
}
.poster img {
  width: 100%;
  height: auto;
  aspect-ratio: 1.921 / 1;
  object-fit: cover;
  opacity: 0.94;
}
.poster figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 32px;
  padding: 18px 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-4);
  font-size: 12px;
  letter-spacing: 0.04em;
}
/* ---------- verification ---------- */
.verify-section {
  border-block: 1px solid var(--line);
  background:
    radial-gradient(800px 460px at 80% 0%, rgba(96, 124, 190, 0.09), transparent 64%),
    var(--surface);
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.35fr);
  gap: clamp(44px, 6vw, 104px);
  align-items: start;
}
.split-aside { position: sticky; top: 116px; }
.split-aside .section-note { margin-top: 24px; }
.aside-stamp {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
  padding: 14px 20px;
  border: 1px solid var(--gold-line);
  background: var(--gold-dim);
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.7;
  letter-spacing: 0.2em;
}
.aside-stamp .cn {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.verify-list { border-top: 1px solid var(--line-2); }
.verify-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
  padding: clamp(30px, 3.2vw, 46px) 0;
  border-bottom: 1px solid var(--line);
}
.verify-item .verify-num {
  margin: 0;
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
  line-height: 1;
  color: var(--gold);
}
.verify-item .verify-num small {
  display: block;
  margin-top: 12px;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.22em;
}
.verify-item h3 {
  margin-bottom: 14px;
  font-size: clamp(19px, 1.7vw, 23px);
  font-weight: 600;
}
.verify-item p {
  margin-bottom: 18px;
  color: var(--ink-3);
  font-size: 14.5px;
  line-height: 2;
}
.verify-item strong {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line-2);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
}
/* ---------- ledger ---------- */
.ledger { border-top: 1px solid var(--line-2); }
.ledger-head,
.ledger-row {
  display: grid;
  grid-template-columns: 104px minmax(180px, 0.85fr) minmax(0, 1.05fr) minmax(0, 1.25fr);
  gap: clamp(18px, 2.6vw, 40px);
}
.ledger-head {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.22em;
}
.ledger-row {
  align-items: start;
  padding: clamp(24px, 2.6vw, 34px) 0;
  border-bottom: 1px solid var(--line);
  transition: background 260ms ease;
}
.ledger-row:hover { background: rgba(255, 255, 255, 0.018); }
.err-code {
  color: var(--alert);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.ledger-row h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}
.ledger-row p {
  color: var(--ink-3);
  font-size: 13.5px;
  line-height: 1.9;
}
.ledger-row p.action { color: var(--ink-2); }
/* ---------- risk ---------- */
.risk {
  border-block: 1px solid var(--line);
  background:
    radial-gradient(700px 400px at 12% 50%, rgba(224, 117, 79, 0.12), transparent 62%),
    var(--void);
}
.risk-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(36px, 5vw, 84px);
  align-items: center;
  padding-block: clamp(56px, 6vw, 92px);
}
.risk h2 {
  margin-top: 20px;
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.32;
}
.risk .eyebrow { color: var(--alert); }
.risk-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 15px;
}
.risk-list li:last-child { border-bottom: 1px solid var(--line); }
.risk-list i {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(224, 117, 79, 0.4);
  background: var(--alert-dim);
  color: var(--alert);
  font-size: 11px;
  font-style: normal;
  line-height: 1;
}
/* ---------- region note ---------- */
.region {
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.region-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr) auto;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding-block: clamp(48px, 5vw, 76px);
}
.region h2 {
  margin-top: 18px;
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 650;
  line-height: 1.4;
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gold-line);
  color: var(--gold-bright);
  font-size: 13px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: border-color 200ms ease, gap 200ms ease;
}
.link-arrow:hover { border-color: var(--gold); gap: 14px; }
/* ---------- faq ---------- */
.faq-list { border-top: 1px solid var(--line-2); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: block;
  cursor: pointer;
  list-style: none;
  transition: color 200ms ease;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { color: var(--gold-bright); }
.faq-list summary h3 {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 28px;
  gap: 16px;
  align-items: center;
  padding: 24px 0;
  font-size: 16px;
  font-weight: 550;
  line-height: 1.6;
}
.faq-num {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
}
.faq-toggle {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
  transition: transform 260ms ease;
}
.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold);
  transform: translate(-50%, -50%);
}
.faq-toggle::before { width: 14px; height: 1px; }
.faq-toggle::after { width: 1px; height: 14px; }
.faq-list details[open] .faq-toggle { transform: rotate(45deg); }
.faq-list details[open] summary { color: var(--ink); }
.faq-list details > p {
  max-width: 62em;
  margin: -4px 0 28px 68px;
  color: var(--ink-3);
  font-size: 14.5px;
  line-height: 2.05;
}
/* ---------- related links ---------- */
.related {
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}
.related-grid a {
  display: block;
  padding: clamp(24px, 2.6vw, 34px);
  background: var(--surface);
  transition: background 240ms ease;
}
.related-grid a:hover { background: var(--surface-3); }
.related-grid h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
}
.related-grid p {
  color: var(--ink-4);
  font-size: 13.5px;
  line-height: 1.85;
}
.related-grid span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
}
/* ---------- changelog ---------- */
.changelog { border-top: 1px solid var(--line-2); }
.changelog li {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.changelog time {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.changelog p { color: var(--ink-3); font-size: 14px; line-height: 1.9; }
/* ---------- sources ---------- */
.sources {
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.source-list { border-top: 1px solid var(--line-2); }
.source-list li { border-bottom: 1px solid var(--line); }
.source-list a {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 24px 0;
  color: var(--ink-2);
  font-size: 15px;
  transition: color 200ms ease, padding-left 240ms ease;
}
.source-list a:hover { color: var(--gold-bright); padding-left: 8px; }
.source-list a > span:first-child {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
}
.source-list a > span:last-child { color: var(--ink-4); font-size: 13px; }
/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--void);
  padding-block: clamp(44px, 5vw, 68px);
}
.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.4fr) auto;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.footer-inner > p {
  color: var(--ink-4);
  font-size: 12.5px;
  line-height: 1.95;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 32px;
  margin-top: 38px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--ink-4);
  font-size: 12px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}
.footer-links a { transition: color 180ms ease; }
.footer-links a:hover { color: var(--gold-bright); }
/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; }
  .answer-panel { max-width: 620px; }
  .section-head { grid-template-columns: 1fr; align-items: start; }
  .section-head .section-note { padding-bottom: 0; max-width: 46em; }
  .record { grid-template-columns: 88px minmax(0, 1fr) minmax(220px, 0.8fr); }
  .record > p { grid-column: 2; }
  .split { grid-template-columns: 1fr; gap: 48px; }
  .split-aside { position: static; max-width: 640px; }
  .risk-inner { grid-template-columns: 1fr; }
  .region-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .site-nav { display: none; }
  .menu-link { display: inline-flex; }
  .header-inner { min-height: 66px; }
  .ledger-head { display: none; }
  .ledger-row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px 20px;
  }
  .ledger-row p { grid-column: 1 / -1; }
  .strip ul { grid-template-columns: 1fr 1fr; }
  .strip li:nth-child(3) { border-left: 0; }
  .strip li:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .glossary div { grid-template-columns: 1fr; gap: 8px; }
  .changelog li { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 620px) {
  .hero h1 { font-size: 36px; }
  .hero-lead { margin-bottom: 34px; }
  .btn { width: 100%; justify-content: space-between; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-disclaimer { text-align: left; }
  .answer-list li { grid-template-columns: 1fr; gap: 8px; }
  .record { grid-template-columns: 1fr; gap: 16px; }
  .record > p { grid-column: 1; }
  .check-list { grid-template-columns: 1fr; }
  .verify-item { grid-template-columns: 1fr; gap: 16px; }
  .verify-item .verify-num { font-size: 36px; }
  .verify-item .verify-num small { display: inline-block; margin: 0 0 0 14px; }
  .faq-list summary h3 { grid-template-columns: 40px minmax(0, 1fr) 20px; gap: 12px; }
  .faq-list details > p { margin-left: 52px; }
  .source-list a { grid-template-columns: 40px minmax(0, 1fr); }
  .source-list a > span:last-child { grid-column: 2; }
  .poster figcaption { flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
  

/* ---------- bottom floating Binance CTA ---------- */
body {
  padding-bottom: calc(88px + env(safe-area-inset-bottom));
}

.binance-float-ad {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  border-top: 1px solid rgba(201, 165, 95, 0.36);
  background: rgba(7, 9, 13, 0.96);
  box-shadow: 0 -16px 40px rgba(0, 0, 0, 0.38);
  backdrop-filter: saturate(150%) blur(18px);
  -webkit-backdrop-filter: saturate(150%) blur(18px);
  padding-bottom: env(safe-area-inset-bottom);
}

.binance-float-ad__inner {
  width: min(var(--shell), 100%);
  min-height: 88px;
  margin-inline: auto;
  padding: 13px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.binance-float-ad__copy {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 14px;
}

.binance-float-ad__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--gold-line);
  background: var(--gold-dim);
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.binance-float-ad__text {
  min-width: 0;
}

.binance-float-ad__title {
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.binance-float-ad__title b {
  color: var(--gold-bright);
  font-weight: 750;
}

.binance-float-ad__note {
  margin-top: 4px;
  color: var(--ink-4);
  font-size: 11px;
  line-height: 1.5;
}

.binance-float-ad__actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.binance-float-ad__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 110px;
  height: 44px;
  padding: 0 20px;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold-bright);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.binance-float-ad__btn:hover {
  transform: translateY(-1px);
  background: var(--gold-dim);
}

.binance-float-ad__btn--primary {
  background: var(--gold);
  color: #0a0c11;
}

.binance-float-ad__btn--primary:hover {
  background: var(--gold-bright);
  color: #0a0c11;
}

@media (max-width: 620px) {
  body {
    padding-bottom: calc(82px + env(safe-area-inset-bottom));
  }

  .binance-float-ad__inner {
    min-height: 82px;
    padding: 10px 12px;
    gap: 10px;
  }

  .binance-float-ad__copy {
    gap: 9px;
  }

  .binance-float-ad__mark {
    width: 36px;
    height: 36px;
    font-size: 9px;
  }

  .binance-float-ad__title {
    font-size: 13px;
    line-height: 1.3;
  }

  .binance-float-ad__note {
    display: none;
  }

  .binance-float-ad__actions {
    gap: 6px;
  }

  .binance-float-ad__btn {
    min-width: 66px;
    height: 38px;
    padding: 0 9px;
    font-size: 12px;
    letter-spacing: 0;
  }
}