:root {
  --color-surface: #fcfcfc;
  --color-surface-alt: #f2f2f2;
  --color-surface-deep: #e5e4e4;
  --color-ink: #3a3133;
  --color-ink-soft: #6a5d5f;
  --color-ink-muted: #87787b;
  --color-line: #d9d7d8;
  --color-primary: #c23d55;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #f4e1e5;
  --color-accent: #1c8387;
  --color-accent-ink: #ffffff;
  --color-highlight: #d4e6e7;
  --color-focus: #127e82;
  --color-contrast-surface: #191012;
  --color-contrast-ink: #e7e4e5;
  --color-contrast-line: #463f40;
  --color-contrast-accent: #2ccdd3;
  --overlay-scrim: linear-gradient(180deg, rgba(25, 16, 18, 0.35) 0%, rgba(25, 16, 18, 0.72) 55%, rgba(25, 16, 18, 0.92) 100%);
  --font-heading: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 10.4px;
  --text-sm: 13.9px;
  --text-base: 16px;
  --text-lg: 21.3px;
  --text-xl: 28.4px;
  --text-2xl: 37.9px;
  --text-3xl: 50.5px;
  --text-4xl: 67.3px;
  --text-display: clamp(44px, 9.1vw, 116px);
  --text-figure: clamp(37px, 6.6vw, 84px);
  --weight-heading: 749;
  --weight-body: 400;
  --leading-body: 1.72;
  --leading-heading: 1.19;
  --tracking-heading: -0.002em;
  --radius-sm: 1px;
  --radius-md: 1px;
  --radius-lg: 1px;
  --radius-pill: 1px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1320px;
  --measure: 67ch;
  --gutter: 24px;
  --section-y: 85px;
  --section-y-lg: 119px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 var(--space-2); padding-left: 1.15em; }
li { margin-bottom: 4px; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-focus); text-decoration: underline; }
img, svg, video { max-width: 100%; height: auto; display: block; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; }
hr { border: 0; border-top: var(--border-thin) solid var(--color-line); margin: var(--space-6) 0; }
code, kbd { font-family: var(--font-mono); font-size: 0.94em; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
::selection { background-color: var(--color-highlight); color: var(--color-ink); }

/* ---------- utilities ---------- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: var(--space-2); left: var(--space-2); z-index: 200;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm); font-weight: 600;
  transform: translateY(-220%);
  transition: transform 160ms ease-out;
}
.skip-link:focus { transform: translateY(0); color: var(--color-contrast-ink); text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--space-8); }
.prose { max-width: var(--measure); }
.lede { max-width: var(--measure); font-size: var(--text-lg); line-height: 1.5; color: var(--color-ink-soft); }
.eyebrow {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.display-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.92;
  letter-spacing: var(--tracking-heading);
}
.display-figure {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.94;
  font-variant-numeric: tabular-nums;
}
.accent-rule { border-left: 2px solid var(--color-primary); padding-left: var(--space-3); }
.section-head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.section-head__title { margin: 0; font-size: var(--text-2xl); }
.section-head__meta {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.06em; color: var(--color-ink-muted);
}

/* ---------- split screen skeleton ---------- */
.split { display: grid; grid-template-columns: minmax(0, 1fr); }
.split__aside {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y) var(--gutter);
}
.split__aside h1, .split__aside h2, .split__aside h3, .split__aside h4 { color: var(--color-contrast-ink); }
.split__aside a { color: var(--color-contrast-accent); }
.split__main {
  background-color: var(--color-surface);
  padding: var(--section-y) var(--gutter);
}
.grid--2 { display: grid; gap: var(--gutter); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--auto { display: grid; gap: var(--gutter); grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

@media (min-width: 961px) {
  .split--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
  .split--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .split__aside {
    padding-left: max(var(--space-3), calc((100vw - var(--container)) / 2));
    padding-right: var(--space-6);
    padding-block: var(--section-y-lg);
  }
  .split__main {
    padding-left: var(--space-6);
    padding-right: max(var(--space-3), calc((100vw - var(--container)) / 2));
    padding-block: var(--section-y-lg);
  }
}

/* ---------- dark-side components ---------- */
.data-strip { display: flex; flex-direction: column; gap: var(--space-3); margin: 0; padding: 0; list-style: none; }
.data-strip li { margin: 0; }
.data-strip__item { padding-left: var(--space-2); border-left: 2px solid var(--color-contrast-line); }
.data-strip__item--live { border-left-color: var(--color-contrast-accent); }
.data-strip__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1.1;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}
.data-strip__label {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}
.data-strip--sticky { position: sticky; top: calc(72px + var(--space-3)); }

.anchor-index { display: flex; flex-direction: column; gap: 2px; margin: 0; padding: 0; list-style: none; }
.anchor-index li { margin: 0; }
.anchor-index__link {
  display: flex; align-items: baseline; gap: var(--space-2);
  padding: 8px var(--space-2);
  border-left: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color 150ms ease-out, border-color 150ms ease-out, background-color 150ms ease-out;
}
.anchor-index__link:hover { color: var(--color-accent); border-left-color: var(--color-accent); text-decoration: none; }
.anchor-index__link.is-active {
  color: var(--color-ink);
  border-left-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}
.anchor-index__num { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-muted); }
.anchor-index--dark .anchor-index__link { color: var(--color-contrast-ink); border-left-color: var(--color-contrast-line); }
.anchor-index--dark .anchor-index__link:hover { color: var(--color-contrast-accent); border-left-color: var(--color-contrast-accent); }
.anchor-index--dark .anchor-index__link.is-active {
  color: var(--color-contrast-accent);
  border-left-color: var(--color-contrast-accent);
  background-color: transparent;
}
.anchor-index--dark .anchor-index__num { color: var(--color-contrast-ink); opacity: 0.6; }

/* ---------- light-side components ---------- */
.stat-grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.stat { padding-left: var(--space-3); border-left: 2px solid var(--color-primary); }
.stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1.05;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}
.stat__value--display { font-size: var(--text-figure); line-height: 0.94; }
.stat__label { display: block; margin-top: var(--space-1); font-size: var(--text-sm); color: var(--color-ink-soft); }

.band { background-color: var(--color-surface-alt); padding-block: var(--space-6); }
.band__list { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-8); margin: 0; padding: 0; list-style: none; }
.band__list li { margin: 0; }
.band__item { display: flex; flex-direction: column; gap: 2px; min-width: 132px; }
.band__label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent);
}
.band__value { font-size: var(--text-lg); color: var(--color-ink); }
.band--dark { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.band--dark .band__value { color: var(--color-contrast-ink); }
.band--dark .band__label { color: var(--color-contrast-accent); }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
}
.tag--accent { background-color: var(--color-highlight); border-color: transparent; color: var(--color-accent); }
.tag--primary { background-color: var(--color-primary-soft); border-color: transparent; color: var(--color-primary); }
.tag--dark { background-color: transparent; border-color: var(--color-contrast-line); color: var(--color-contrast-ink); }

.notice {
  border-left: 2px solid var(--color-primary);
  background-color: var(--color-surface-alt);
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.notice--accent { border-left-color: var(--color-accent); background-color: var(--color-highlight); color: var(--color-ink); }

.entry-list { margin: 0; padding: 0; list-style: none; }
.entry-list li { margin: 0; }
.entry {
  display: grid;
  gap: var(--space-1) var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.entry__title { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: var(--weight-heading); line-height: var(--leading-heading); }
.entry__meta { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-ink-muted); letter-spacing: 0.04em; }
.entry__text { color: var(--color-ink-soft); max-width: var(--measure); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-1);
  padding: 12px var(--space-3);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease-out, color 150ms ease-out, border-color 150ms ease-out;
}
.btn:hover { text-decoration: none; }
.btn--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.btn--primary:hover {
  background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-contrast-surface));
  color: var(--color-primary-ink);
}
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 84%, var(--color-contrast-surface));
  color: var(--color-accent-ink);
}
.btn--ghost { border-color: var(--color-line); color: var(--color-ink); }
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--sm { padding: 8px 14px; font-size: var(--text-xs); letter-spacing: 0.04em; }
.btn--block { width: 100%; }

/* ---------- breadcrumb ---------- */
.breadcrumb { padding-block: var(--space-3); font-size: var(--text-sm); color: var(--color-ink-muted); }
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 0 var(--space-1); margin: 0; padding: 0; list-style: none; }
.breadcrumb__list li { margin: 0; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb__item + .breadcrumb__item::before { content: "／"; color: var(--color-line); }
.breadcrumb__link { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb__link:hover { color: var(--color-accent); }
.breadcrumb__current { color: var(--color-ink); }

/* ---------- expandable panels ---------- */
.panel-group { border-top: var(--border-thin) solid var(--color-line); }
.panel { border-bottom: var(--border-thin) solid var(--color-line); }
.panel__summary {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  transition: color 150ms ease-out;
}
.panel__summary::-webkit-details-marker { display: none; }
.panel__summary::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-accent);
}
.panel[open] > .panel__summary { color: var(--color-accent); }
.panel[open] > .panel__summary::after { content: "－"; }
.panel__body { padding-bottom: var(--space-4); max-width: var(--measure); color: var(--color-ink-soft); }
@keyframes panel-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: no-preference) {
  .panel[open] > .panel__body { animation: panel-in 220ms ease-out; }
}

/* ---------- image containers ---------- */
.media-frame {
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-1);
}
.media-frame__media { position: relative; display: block; overflow: hidden; background-color: var(--color-surface-deep); }
.media-frame__img { width: 100%; height: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.media-frame--portrait .media-frame__img { aspect-ratio: 3 / 4; }
.media-frame--square .media-frame__img { aspect-ratio: 1 / 1; }
.media-frame--wide .media-frame__img { aspect-ratio: 21 / 9; }
.media-frame__scrim { position: absolute; inset: 0; background-image: var(--overlay-scrim); pointer-events: none; }
.media-frame__label {
  position: absolute; left: var(--space-2); right: var(--space-2); bottom: var(--space-2);
  z-index: 1;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
}
.media-frame__caption { padding: var(--space-1) var(--space-1) 0; font-size: var(--text-xs); color: var(--color-ink-muted); }

/* ---------- tables ---------- */
.table-basic { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.table-basic caption { padding-bottom: var(--space-2); text-align: left; font-size: var(--text-xs); color: var(--color-ink-muted); }
.table-basic th, .table-basic td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.table-basic thead th {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 600;
  border-bottom-color: transparent;
}
.table-basic tbody tr:nth-child(even) { background-color: var(--color-surface-deep); }
.table-basic td.is-key { font-family: var(--font-mono); color: var(--color-ink); font-variant-numeric: tabular-nums; }

/* ---------- reveal ---------- */
html[data-reveal-ready] [data-reveal] { opacity: 0; transform: translateY(10px); }
html[data-reveal-ready] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.site-header[data-scrolled="true"] { border-bottom-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-line)); }
.site-header__split {
  display: grid;
  grid-template-columns: minmax(240px, 34fr) minmax(0, 66fr);
  align-items: stretch;
  min-height: 76px;
}
.site-header__brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-2) var(--space-4) var(--space-2) max(var(--space-3), calc((100vw - var(--container)) / 2));
}
.brand { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2); text-decoration: none; }
.brand:hover { color: var(--color-contrast-ink); text-decoration: none; }
.brand__mark {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.01em;
  color: var(--color-contrast-ink);
}
.brand__version {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}
.site-header__note {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
  opacity: 0.62;
}
.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  background-color: var(--color-surface);
  padding: var(--space-2) max(var(--space-3), calc((100vw - var(--container)) / 2)) var(--space-2) var(--space-4);
}
.nav { display: flex; align-items: center; gap: var(--space-6); }
.nav__list { display: flex; align-items: center; gap: var(--space-4); margin: 0; padding: 0; list-style: none; }
.nav__list li { margin: 0; }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-1) 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 150ms ease-out;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background-color: transparent;
  transition: background-color 150ms ease-out;
}
.nav__link:hover { color: var(--color-ink); text-decoration: none; }
.nav__link:hover::after { background-color: var(--color-accent); }
.nav__link[aria-current="page"] { color: var(--color-ink); }
.nav__link[aria-current="page"]::before {
  content: "";
  width: 2px;
  align-self: stretch;
  min-height: 14px;
  background-color: var(--color-primary);
}
.nav__link[aria-current="page"]::after { background-color: var(--color-primary); }
.nav__cta { flex: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 10px var(--space-3);
  background-color: transparent;
  color: var(--color-ink);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  transition: color 150ms ease-out, border-color 150ms ease-out;
}
.nav-toggle:hover { color: var(--color-accent); border-color: var(--color-accent); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 1px;
  width: 100%;
  background-color: currentColor;
  transition: transform 160ms ease-out;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(2.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-2.5px) rotate(-45deg); }
.nav-toggle__text { letter-spacing: 0.04em; }

.scroll-meter { height: 2px; background-color: var(--color-surface-alt); }
.scroll-meter__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: left center;
  transform: scaleX(var(--scroll, 0));
  background-color: var(--color-primary);
}

@media (max-width: 1024px) {
  .site-header__split { grid-template-columns: minmax(0, 1fr) auto; min-height: 0; }
  .site-header__brand { padding: var(--space-2) var(--space-2) var(--space-2) var(--gutter); }
  .site-header__nav { padding: var(--space-2) var(--gutter) var(--space-2) var(--space-2); }
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    max-height: 70vh;
    overflow-y: auto;
    padding: var(--space-3) var(--gutter) var(--space-6);
    background-color: var(--color-contrast-surface);
    color: var(--color-contrast-ink);
    border-top: var(--border-thin) solid var(--color-contrast-line);
  }
  .nav[data-open] { display: flex; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link {
    color: var(--color-contrast-ink);
    font-size: var(--text-base);
    padding: var(--space-2) 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }
  .nav__link:hover { color: var(--color-contrast-accent); }
  .nav__link[aria-current="page"] { color: var(--color-contrast-accent); }
  .nav__link[aria-current="page"]::after { background-color: transparent; }
  .nav__cta { align-self: flex-start; margin-top: var(--space-2); }
}

/* ---------- footer ---------- */
.site-footer {
  background-color: var(--color-surface);
  border-top: var(--border-thin) solid var(--color-line);
  padding: var(--section-y) 0 var(--space-6);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}
.site-footer__inner { display: flex; flex-direction: column; gap: var(--space-6); }
.site-footer__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
}
.footer-brand {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.footer-scope { margin: 0; max-width: var(--measure); color: var(--color-ink-soft); }
.footer-links {
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding-block: var(--space-3);
}
.footer-links__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-links__list li { margin: 0; }
.footer-links__link { color: var(--color-ink-soft); font-size: var(--text-sm); text-decoration: none; }
.footer-links__link:hover { color: var(--color-accent); }
.footer-legal { display: flex; flex-direction: column; gap: var(--space-1); font-size: var(--text-sm); color: var(--color-ink-muted); }
.footer-legal p { margin: 0; }
.footer-legal__contact { color: var(--color-ink-soft); font-variant-numeric: tabular-nums; }
.footer-legal__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.footer-legal__note { max-width: var(--measure); font-size: var(--text-xs); color: var(--color-ink-muted); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
  .stat-grid { grid-template-columns: minmax(0, 1fr); }
  .section { padding-block: var(--space-8); }
  .section--lg { padding-block: var(--space-8); }
  .split__aside, .split__main { padding-block: var(--space-8); }
  .site-footer { padding-top: var(--space-8); }
  .brand { gap: var(--space-1); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html[data-reveal-ready] [data-reveal] { opacity: 1; transform: none; }
}