:root {
  --bg: #fafafa;
  --paper: #ffffff;
  --paper-soft: #f4f7f7;
  --ink: #09090b;
  --ink-2: #18181b;
  --muted: #4b5563;
  --muted-2: #71717a;
  --line: #dde5eb;
  --line-strong: #c7d3dd;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --teal: #0f766e;
  --brass: #b7791f;
  --red: #dc2626;
  --shadow: 0 24px 68px rgba(15, 23, 42, 0.12);
  --max: 1180px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.04) 1px, transparent 1px) 0 0 / 96px 96px,
    linear-gradient(0deg, rgba(37, 99, 235, 0.035) 1px, transparent 1px) 0 0 / 96px 96px,
    var(--bg);
  font-family: "Public Sans", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: 0;
  font: inherit;
}

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--blue), var(--brass));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 26px;
  width: min(var(--max), calc(100% - 40px));
  margin: 14px auto 0;
  padding: 10px 12px;
  background: rgba(250, 250, 250, 0.9);
  border: 1px solid rgba(221, 229, 235, 0.92);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  transition: background 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(199, 211, 221, 0.95);
  box-shadow: 0 14px 42px rgba(15, 23, 42, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 40px;
  height: 40px;
  color: #fff;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 22px;
  font-weight: 900;
  background: linear-gradient(135deg, #18181b, #0f766e);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 7px;
}

.brand strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.15;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: var(--muted-2);
  font-size: 12px;
  line-height: 1.2;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.nav-links a,
.nav-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 12px;
  color: var(--muted);
  font-size: 14px;
  border-radius: 7px;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.nav-links a:hover,
.nav-action:hover {
  color: var(--ink);
  background: var(--paper-soft);
}

.nav-action {
  gap: 8px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.nav-action svg {
  width: 16px;
  height: 16px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.08fr);
  gap: 56px;
  align-items: center;
  width: min(var(--max), calc(100% - 40px));
  min-height: calc(100vh - 84px);
  margin: 0 auto;
  padding: 72px 0 56px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
}

.hero h1,
.section-heading h2,
.follow-inner h2 {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-weight: 900;
}

.hero h1 {
  max-width: 700px;
  font-size: 64px;
  line-height: 1.05;
}

.hero-statement {
  max-width: 640px;
  margin: 20px 0 0;
  color: var(--ink-2);
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.28;
}

.hero-lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 18px;
  font-weight: 700;
  border-radius: 7px;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.22);
}

.button.primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.button.secondary {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.button.secondary:hover {
  background: var(--paper-soft);
  transform: translateY(-1px);
}

.button:focus-visible,
.tab:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 3px;
}

.hero-board {
  position: relative;
  margin: 0;
  padding: 14px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-board::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -10px;
  width: 172px;
  height: 15px;
  background: repeating-linear-gradient(
    90deg,
    rgba(183, 121, 31, 0.72) 0 14px,
    rgba(183, 121, 31, 0.18) 14px 20px
  );
  border-radius: 2px;
  transform: rotate(1.5deg);
}

.board-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 4px 12px;
  color: var(--muted-2);
  font-size: 12px;
  font-weight: 700;
}

.market-map {
  display: block;
  width: 100%;
  height: auto;
  overflow: hidden;
  background: #f8fbff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.line-main {
  fill: none;
  stroke: var(--blue);
  stroke-width: 7;
}

.line-soft {
  fill: none;
  stroke: var(--teal);
  stroke-dasharray: 8 12;
  stroke-width: 3;
}

.map-node circle {
  fill: #fff;
  stroke: var(--ink-2);
  stroke-width: 2;
}

.map-node.main circle {
  fill: #eff6ff;
  stroke: var(--blue);
  stroke-width: 3;
}

.map-node text,
.board-note text {
  fill: var(--ink);
  font-family: "Public Sans", "PingFang SC", sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-anchor: middle;
  stroke: none;
}

.board-note rect {
  fill: rgba(255, 255, 255, 0.88);
  stroke: var(--line-strong);
}

.board-note text {
  font-size: 17px;
  text-anchor: start;
}

.hero-board figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(var(--max), calc(100% - 40px));
  margin: -10px auto 0;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.signal-strip article {
  padding: 22px 24px;
  border-right: 1px solid var(--line);
}

.signal-strip article:last-child {
  border-right: 0;
}

.signal-strip span {
  display: block;
  color: var(--ink);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.15;
}

.signal-strip p {
  margin: 7px 0 0;
  color: var(--muted-2);
  font-size: 14px;
}

.section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 104px 0 0;
  scroll-margin-top: 92px;
}

.section-heading {
  max-width: 790px;
}

.section-heading h2,
.follow-inner h2 {
  font-size: 44px;
  line-height: 1.16;
}

.about-section {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 70px;
  align-items: start;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}

.about-copy p + p {
  margin-top: 18px;
}

.trait-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.trait-row article,
.note-card,
.language-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.trait-row article {
  padding: 24px;
}

.trait-row strong {
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 28px;
}

.trait-row p {
  margin: 12px 0 0;
  color: var(--muted);
}

.system-board {
  display: grid;
  grid-template-columns: minmax(320px, 0.92fr) repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.system-lead,
.system-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.system-lead {
  min-height: 330px;
  padding: 30px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(0deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px) 0 0 / 42px 42px,
    #111827;
}

.system-lead span,
.system-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 30px;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 6px;
}

.system-lead span {
  color: #67e8f9;
  background: rgba(255, 255, 255, 0.1);
}

.system-lead h3,
.system-card h3,
.case-copy h2 {
  margin: 26px 0 0;
  color: inherit;
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-weight: 900;
  line-height: 1.22;
}

.system-lead h3 {
  max-width: 360px;
  font-size: 32px;
}

.system-lead p {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 16px;
  line-height: 1.85;
}

.system-card {
  min-height: 330px;
  padding: 26px;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.system-card:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.38);
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
}

.system-card span {
  color: var(--teal);
  background: rgba(15, 118, 110, 0.08);
}

.system-card h3 {
  font-size: 23px;
}

.system-card p {
  margin: 16px 0 0;
  color: var(--muted);
}

.system-card a {
  display: inline-flex;
  margin-top: 24px;
  color: var(--blue);
  font-weight: 700;
}

.case-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
  gap: 54px;
  align-items: start;
}

.case-copy {
  position: sticky;
  top: 110px;
}

.case-copy h2 {
  margin-top: 0;
  color: var(--ink);
  font-size: 42px;
}

.case-copy p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.case-rail {
  position: relative;
  display: grid;
  gap: 14px;
}

.case-rail::before {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 86px;
  width: 2px;
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.25), rgba(37, 99, 235, 0.36), rgba(183, 121, 31, 0.25));
}

.case-rail article {
  position: relative;
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.case-rail time {
  padding-top: 26px;
  color: var(--teal);
  font-weight: 700;
}

.case-rail article::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 78px;
  width: 16px;
  height: 16px;
  background: #fff;
  border: 4px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 7px rgba(37, 99, 235, 0.08);
}

.case-rail article > div {
  padding: 24px 26px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-left: 4px solid rgba(15, 118, 110, 0.72);
  border-radius: var(--radius);
}

.case-rail span {
  color: var(--brass);
  font-size: 13px;
  font-weight: 700;
}

.case-rail h3 {
  margin: 9px 0 0;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.35;
}

.case-rail p {
  margin: 12px 0 0;
  color: var(--muted);
}

.case-rail a {
  display: inline-flex;
  margin-top: 18px;
  color: var(--blue);
  font-weight: 700;
}

.method-shell {
  margin-top: 34px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 54px rgba(15, 23, 42, 0.08);
}

.tab-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--paper-soft);
  border-bottom: 1px solid var(--line);
}

.tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 58px;
  color: var(--muted);
  background: transparent;
  border-right: 1px solid var(--line);
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease;
}

.tab:last-child {
  border-right: 0;
}

.tab svg {
  width: 18px;
  height: 18px;
}

.tab.is-active {
  color: var(--ink);
  background: #fff;
}

.panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  min-height: 356px;
  padding: 42px;
}

.panel[hidden] {
  display: none;
}

.panel-label,
.note-meta {
  margin: 0 0 13px;
  color: var(--brass);
  font-size: 13px;
  font-weight: 700;
}

.panel h3 {
  max-width: 720px;
  margin: 0;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 32px;
  font-weight: 900;
  line-height: 1.25;
}

.panel p:not(.panel-label) {
  max-width: 690px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.source-link,
.note-card a,
.timeline a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue);
  font-weight: 700;
}

.source-link {
  margin-top: 28px;
}

.source-link svg {
  width: 17px;
  height: 17px;
}

.axis-visual,
.bar-visual,
.quote-visual,
.price-visual {
  min-height: 260px;
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.05) 1px, transparent 1px) 0 0 / 36px 36px,
    linear-gradient(0deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px) 0 0 / 36px 36px,
    #fbfdff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.axis-visual {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: center;
  padding: 34px;
}

.axis-visual::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 28px;
  right: 28px;
  height: 2px;
  background: var(--line-strong);
}

.axis-visual span,
.price-visual span {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 54px;
  color: var(--ink);
  font-weight: 700;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.bar-visual {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: 14px;
  padding: 28px 22px;
}

.bar-visual span {
  align-self: start;
  min-height: 42px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.bar-visual i {
  grid-row: 2;
  display: block;
  min-height: 50px;
  background: linear-gradient(180deg, var(--blue), rgba(15, 118, 110, 0.78));
  border-radius: 6px 6px 2px 2px;
}

.quote-visual {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 34px;
}

.quote-visual strong {
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.35;
}

.quote-visual p {
  margin: 18px 0 0;
  color: var(--muted);
}

.price-visual {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-content: center;
  padding: 36px;
}

.price-visual::after {
  content: "";
  position: absolute;
  inset: 48px;
  border: 1px dashed var(--line-strong);
  border-radius: 50%;
}

.note-grid,
.language-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.note-card {
  min-height: 290px;
  padding: 24px;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.note-card:hover,
.language-card:hover {
  border-color: rgba(37, 99, 235, 0.38);
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
  transform: translateY(-3px);
}

.note-card h3,
.language-card h3 {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 23px;
  font-weight: 900;
  line-height: 1.32;
}

.note-card p:not(.note-meta),
.language-card p {
  margin: 16px 0 0;
  color: var(--muted);
}

.note-card a {
  margin-top: 22px;
}

.language-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.language-card {
  min-height: 250px;
  padding: 26px;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.language-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 30px;
  margin-bottom: 34px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  background: rgba(15, 118, 110, 0.08);
  border-radius: 6px;
}

.timeline {
  position: relative;
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 78px;
  width: 2px;
  background: linear-gradient(180deg, rgba(15, 118, 110, 0.28), rgba(37, 99, 235, 0.34), rgba(183, 121, 31, 0.24));
}

.timeline article {
  position: relative;
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  min-height: 0;
}

.timeline-date {
  position: relative;
  padding-top: 24px;
}

.timeline-date::after {
  content: "";
  position: absolute;
  top: 48px;
  left: 70px;
  width: 18px;
  height: 18px;
  background: #fff;
  border: 4px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.08);
}

.timeline time {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  color: var(--teal);
  font-size: 18px;
  font-weight: 700;
}

.timeline-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 28px;
  align-items: center;
  min-height: 132px;
  padding: 22px 24px 22px 26px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-left: 4px solid rgba(15, 118, 110, 0.72);
  border-radius: var(--radius);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.timeline-card:hover {
  border-color: rgba(37, 99, 235, 0.36);
  box-shadow: 0 18px 44px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

.timeline-tag {
  grid-column: 1;
  margin: 0 0 8px;
  color: var(--brass);
  font-size: 13px;
  font-weight: 700;
}

.timeline h3 {
  grid-column: 1;
  margin: 0;
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.35;
}

.timeline p {
  grid-column: 1;
  margin: 0;
  color: var(--muted);
}

.timeline h3 + p {
  margin-top: 8px;
}

.timeline a {
  justify-content: center;
  grid-column: 2;
  grid-row: 1 / span 3;
  align-self: center;
  min-width: 112px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(37, 99, 235, 0.22);
  border-radius: 7px;
  background: #fff;
  transition: background 180ms ease, border-color 180ms ease;
}

.timeline a:hover {
  background: #eff6ff;
  border-color: rgba(37, 99, 235, 0.44);
}

.timeline a svg {
  width: 16px;
  height: 16px;
}

.follow-section {
  width: min(var(--max), calc(100% - 40px));
  margin: 104px auto 0;
  padding-bottom: 0;
}

.follow-inner {
  position: relative;
  overflow: hidden;
  padding: 48px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.09) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(0deg, rgba(255, 255, 255, 0.09) 1px, transparent 1px) 0 0 / 44px 44px,
    #111827;
  border-radius: var(--radius);
}

.follow-inner::after {
  content: "";
  position: absolute;
  right: 42px;
  bottom: 38px;
  width: 210px;
  height: 18px;
  background: repeating-linear-gradient(
    90deg,
    rgba(183, 121, 31, 0.85) 0 16px,
    rgba(255, 255, 255, 0.22) 16px 22px
  );
  border-radius: 3px;
}

.follow-inner .eyebrow {
  color: #67e8f9;
}

.follow-inner h2,
.follow-inner p,
.follow-inner .button {
  position: relative;
  z-index: 1;
}

.follow-inner h2 {
  max-width: 760px;
  color: #fff;
}

.follow-inner p {
  max-width: 650px;
  margin: 18px 0 28px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 32px 0 46px;
  color: var(--muted-2);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--ink);
  font-weight: 700;
}

.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .nav-links {
    display: none;
  }

  .nav-action {
    justify-self: end;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    min-height: 0;
    padding: 44px 0 30px;
  }

  .hero h1 {
    font-size: 58px;
  }

  .hero-statement {
    font-size: 30px;
  }

  .hero-board {
    justify-self: center;
    max-width: 760px;
  }

  .market-map {
    max-height: 360px;
  }

  .panel,
  .about-section {
    grid-template-columns: 1fr;
  }

  .system-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .system-lead,
  .system-card {
    min-height: 260px;
  }

  .system-lead {
    padding: 26px;
  }

  .system-card {
    padding: 22px;
  }

  .system-lead {
    grid-column: 1 / -1;
  }

  .case-section {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .case-copy {
    position: static;
  }

  .note-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    background-size: 64px 64px;
  }

  .site-header,
  .hero,
  .signal-strip,
  .section,
  .follow-section,
  .site-footer {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    gap: 12px;
    margin-top: 10px;
  }

  .brand small,
  .nav-action span {
    display: none;
  }

  .nav-action {
    width: 40px;
    padding: 0;
  }

  .hero {
    gap: 22px;
    padding: 24px 0 18px;
  }

  .hero h1 {
    font-size: 42px;
    line-height: 1.12;
  }

  .hero-statement {
    margin-top: 14px;
    font-size: 25px;
  }

  .hero-lead {
    margin-top: 14px;
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .hero-board {
    width: min(100%, 326px);
    padding: 10px;
  }

  .hero-board::before,
  .follow-inner::after {
    display: none;
  }

  .board-top {
    padding-bottom: 8px;
    font-size: 10px;
  }

  .market-map {
    aspect-ratio: 16 / 9;
    height: 100%;
    object-fit: cover;
  }

  .hero-board figcaption {
    font-size: 13px;
  }

  .signal-strip {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 10px;
  }

  .signal-strip article {
    padding: 18px;
    border-bottom: 1px solid var(--line);
  }

  .signal-strip article:nth-child(2n) {
    border-right: 0;
  }

  .signal-strip article:nth-child(n + 3) {
    border-bottom: 0;
  }

  .signal-strip span {
    font-size: 22px;
  }

  .section {
    padding-top: 78px;
  }

  .section-heading h2,
  .follow-inner h2 {
    font-size: 32px;
    line-height: 1.22;
  }

  .about-section {
    gap: 24px;
  }

  .about-copy p {
    font-size: 16px;
  }

  .trait-row,
  .system-board,
  .note-grid,
  .language-grid {
    grid-template-columns: 1fr;
  }

  .system-lead,
  .system-card {
    min-height: 0;
  }

  .system-lead {
    padding: 26px;
  }

  .system-lead h3,
  .case-copy h2 {
    font-size: 30px;
  }

  .case-rail::before {
    top: 10px;
    bottom: 10px;
    left: 16px;
  }

  .case-rail article {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-left: 42px;
  }

  .case-rail time {
    padding-top: 0;
  }

  .case-rail article::before {
    top: 8px;
    left: 8px;
    width: 16px;
    height: 16px;
    border-width: 4px;
  }

  .case-rail article > div {
    padding: 20px;
  }

  .case-rail h3 {
    font-size: 22px;
  }

  .tab-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .tab {
    min-height: 54px;
    border-bottom: 1px solid var(--line);
  }

  .tab:nth-child(2n) {
    border-right: 0;
  }

  .panel {
    gap: 28px;
    padding: 26px 20px;
  }

  .panel h3 {
    font-size: 25px;
  }

  .axis-visual,
  .bar-visual,
  .quote-visual,
  .price-visual {
    min-height: 230px;
  }

  .note-card,
  .language-card {
    min-height: 0;
  }

  .timeline::before {
    top: 10px;
    bottom: 10px;
    left: 16px;
  }

  .timeline article {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-left: 42px;
  }

  .timeline-date {
    padding-top: 0;
  }

  .timeline-date::after {
    top: 8px;
    left: -34px;
    width: 16px;
    height: 16px;
    border-width: 4px;
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.08);
  }

  .timeline time {
    font-size: 16px;
  }

  .timeline-card {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 18px 18px 20px;
  }

  .timeline a {
    justify-self: start;
    grid-column: 1;
    grid-row: auto;
    margin-top: 14px;
  }

  .follow-section {
    margin-top: 78px;
  }

  .follow-inner {
    padding: 34px 22px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}