:root {
  --color-surface: #fefefe;
  --color-surface-alt: #f4f4f4;
  --color-surface-deep: #e6e6e5;
  --color-ink: #34342d;
  --color-ink-soft: #616256;
  --color-ink-muted: #7e7e71;
  --color-line: #dadad8;
  --color-primary: #737817;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #ebebde;
  --color-accent: #2b53d4;
  --color-accent-ink: #ffffff;
  --color-highlight: #d8dff6;
  --color-focus: #1f4de0;
  --color-contrast-surface: #272815;
  --color-contrast-ink: #e7e7e4;
  --color-contrast-line: #515243;
  --color-contrast-accent: #6f8ae1;
  --overlay-scrim: linear-gradient(180deg, rgba(39, 40, 21, 0.35) 0%, rgba(39, 40, 21, 0.72) 55%, rgba(39, 40, 21, 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: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(47px, 9.7vw, 124px);
  --text-figure: clamp(39px, 7.0vw, 89px);
  --weight-heading: 742;
  --weight-body: 400;
  --leading-body: 1.74;
  --leading-heading: 1.16;
  --tracking-heading: 0.006em;
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-pill: 4px;
  --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: 1200px;
  --measure: 73ch;
  --gutter: 32px;
  --section-y: 75px;
  --section-y-lg: 105px;
}

/* ============================================================
   RESET & 中文排版基底
   ============================================================ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-left: 200px;
  background: 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);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg,
video { display: block; max-width: 100%; height: auto; }

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 150ms ease, border-color 150ms ease, background-color 150ms ease;
}
a:hover { color: color-mix(in srgb, var(--color-accent) 76%, var(--color-ink)); }

p { margin: 0 0 var(--space-3); max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 var(--space-3); padding-left: 1.25em; }
li { margin-bottom: 6px; }

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);
  text-wrap: balance;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

strong, b { font-weight: 700; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.94em; }

hr {
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  margin: var(--space-6) 0;
}

::selection {
  background: var(--color-highlight);
  color: var(--color-ink);
}

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
.section--contrast :focus-visible,
.site-header :focus-visible,
.footer-brand :focus-visible { outline-color: var(--color-contrast-accent); }

/* ============================================================
   布局基元
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background: var(--color-surface-alt); }
.section--deep { background: var(--color-surface-deep); }

.section--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--contrast h1,
.section--contrast h2,
.section--contrast h3,
.section--contrast h4 { color: var(--color-contrast-ink); }
.section--contrast p,
.section--contrast li { color: var(--color-contrast-ink); }
.section--contrast a { color: var(--color-contrast-accent); }
.section--contrast a:hover { color: color-mix(in srgb, var(--color-contrast-accent) 70%, var(--color-contrast-ink)); }
.section--contrast hr { border-top-color: var(--color-contrast-line); }
.section--contrast .eyebrow { color: var(--color-contrast-accent); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.26em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.eyebrow::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
}
.section--contrast .eyebrow::before { background: var(--color-contrast-accent); }

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.3;
  text-decoration: none;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  cursor: pointer;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover {
  background: color-mix(in srgb, var(--color-primary) 82%, var(--color-ink));
  color: var(--color-primary-ink);
}
.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover {
  background: color-mix(in srgb, var(--color-accent) 82%, var(--color-ink));
  color: var(--color-accent-ink);
}
.btn--ghost {
  background: transparent;
  border-color: var(--color-line);
  color: var(--color-ink);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn--contrast {
  background: transparent;
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.btn--contrast:hover {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb { margin-bottom: var(--space-3); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}
.breadcrumb__item { margin: 0; display: flex; align-items: center; gap: var(--space-1); }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-line);
}
.breadcrumb__item a { color: var(--color-accent); text-decoration: none; }
.breadcrumb__item a:hover { text-decoration: underline; }
.breadcrumb__item[aria-current="page"] { color: var(--color-ink-soft); }

/* ============================================================
   行式对照条 / 口径表
   ============================================================ */
.ledger {
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}
.ledger__row {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--space-3);
  align-items: baseline;
  margin: 0;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.ledger__key {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}
.ledger__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}
.ledger__val--text { font-family: var(--font-body); letter-spacing: 0.02em; }
.section--contrast .ledger { border-top-color: var(--color-contrast-line); }
.section--contrast .ledger__row { border-bottom-color: var(--color-contrast-line); }
.section--contrast .ledger__key { color: var(--color-contrast-accent); }
.section--contrast .ledger__val { color: var(--color-contrast-ink); }

/* ============================================================
   图片容器（页面阶段放置 <img>）
   ============================================================ */
.figure {
  margin: 0;
  padding: var(--space-2);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}
.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
}
.figure__frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}
.figure__label {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  right: var(--space-2);
  z-index: 2;
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-contrast-ink);
}
.figure__caption {
  margin: var(--space-2) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.figure--contrast {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
}
.figure--contrast .figure__frame {
  background: color-mix(in srgb, var(--color-contrast-surface) 72%, var(--color-ink));
}
.figure--contrast .figure__caption { color: var(--color-contrast-accent); }
.figure--tall .figure__frame { aspect-ratio: 4 / 5; }

/* ============================================================
   可展开内容组
   ============================================================ */
.group {
  border-top: var(--border-thin) solid var(--color-line);
}
.group-toggle {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  background: transparent;
  border: 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  border-radius: 0;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-align: left;
  cursor: pointer;
}
.group-toggle::before {
  content: "+";
  flex: none;
  width: 1.2em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  transition: color 150ms ease;
}
.group-toggle[aria-expanded="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.group-toggle[aria-expanded="true"]::before { content: "−"; }
.group-toggle:hover { color: var(--color-accent); }
.group-toggle:hover::before { color: var(--color-accent); }

.group-panel:not([hidden]) { animation: sf-panel-in 180ms ease both; }
.group-panel__inner {
  padding: var(--space-3) var(--space-2) var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.group-panel__inner > :last-child { margin-bottom: 0; }

@keyframes sf-panel-in {
  from { opacity: 0; transform: translateY(-2px); }
  to { opacity: 1; transform: none; }
}

/* ============================================================
   HEADER —— 左侧深色轨道
   ============================================================ */
.skip-link {
  position: absolute;
  top: -120px;
  left: var(--space-2);
  z-index: 300;
  padding: 8px var(--space-2);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-decoration: none;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  top: var(--space-2);
  color: var(--color-accent-ink);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  width: 200px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3) var(--space-6);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-right: var(--border-thin) solid var(--color-contrast-line);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.wordmark {
  display: block;
  flex: none;
  padding-bottom: var(--space-2);
  text-decoration: none;
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.wordmark__name {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: 0.16em;
  color: var(--color-contrast-ink);
}
.wordmark__sub {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}
.wordmark:hover .wordmark__name { color: var(--color-contrast-accent); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  flex: none;
  padding: 9px 12px;
  background: transparent;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  color: var(--color-contrast-ink);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  cursor: pointer;
}
.nav-toggle__mark {
  position: relative;
  display: inline-block;
  width: 14px;
  height: 10px;
}
.nav-toggle__mark::before,
.nav-toggle__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: currentColor;
  transition: transform 160ms ease;
}
.nav-toggle__mark::before { top: 0; }
.nav-toggle__mark::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__mark::before { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__mark::after { transform: translateY(-4.5px) rotate(-45deg); }

.site-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-1);
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__item { margin: 0; }
.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 11px var(--space-2) 11px var(--space-2);
  border-left: 2px solid transparent;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-decoration: none;
}
.site-nav__link:hover {
  color: var(--color-contrast-accent);
  border-left-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
  background: color-mix(in srgb, var(--color-contrast-ink) 6%, transparent);
}
.site-nav__link[aria-current="page"] {
  color: var(--color-contrast-accent);
  font-weight: 700;
  border-left-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 16%, transparent);
}
.site-nav__index {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--color-contrast-accent);
}
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--color-primary); }
.site-nav__label { display: block; }

.site-nav__tail {
  margin-top: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.nav-utility {
  display: block;
  padding: 12px var(--space-2);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-align: center;
  text-decoration: none;
}
.nav-utility:hover {
  background: color-mix(in srgb, var(--color-accent) 80%, var(--color-contrast-surface));
  color: var(--color-accent-ink);
}
.nav-utility__key { display: block; }

.scroll-meter {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  overflow: hidden;
  background: color-mix(in srgb, var(--color-contrast-line) 55%, transparent);
}
.scroll-meter__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
}

/* ============================================================
   FOOTER —— 边框式收口
   ============================================================ */
.site-footer {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.footer-brand {
  position: relative;
  padding: var(--space-6) var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-right: var(--border-thin) solid var(--color-contrast-line);
}
.footer-scale {
  display: block;
  height: 14px;
  margin-bottom: var(--space-4);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-contrast-line) 0 1px,
    transparent 1px 20px
  );
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.footer-brand__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: 0.18em;
  color: var(--color-contrast-ink);
}
.footer-brand__sub {
  margin: var(--space-1) 0 0;
  max-width: none;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
}
.footer-brand__region {
  margin: var(--space-4) 0 0;
  max-width: none;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-ink);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface-alt);
}
.footer-col__title {
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--color-ink-muted);
}
.footer-col__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col__list li { margin: 0; }
.footer-col__list a {
  display: inline-block;
  color: var(--color-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.footer-col__list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  padding: var(--space-4);
  background: var(--color-surface-deep);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  min-width: 190px;
  max-width: none;
}
.footer-contact__item--wide {
  flex: 1 1 320px;
}
.footer-contact__key {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--color-ink-muted);
}
.footer-contact__val {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}
.footer-contact__item--wide .footer-contact__val {
  font-family: var(--font-body);
  letter-spacing: 0.04em;
}
.footer-note {
  flex: 1 1 100%;
  margin: 0;
  max-width: none;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4) var(--space-4);
  background: var(--color-surface-alt);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}
.footer-base::before {
  content: "";
  flex: 1 1 100%;
  height: 10px;
  margin-bottom: var(--space-2);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 1px,
    transparent 1px 16px
  );
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-base__icp,
.footer-base__copy {
  margin: 0;
  max-width: none;
}
.footer-base__icp { font-family: var(--font-mono); letter-spacing: 0.04em; }

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 720px) {
  .container { padding-inline: var(--space-4); }
}

@media (max-width: 1080px) {
  body { padding-left: 176px; }
  .site-header { width: 176px; padding-inline: var(--space-2); }
  .site-nav__link { letter-spacing: 0.1em; }
}

@media (max-width: 980px) {
  body {
    padding-left: 0;
    padding-top: 64px;
  }

  .site-header {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 64px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: 0 var(--space-3);
    border-right: 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
    overflow: visible;
  }

  .wordmark {
    padding-bottom: 0;
    border-bottom: 0;
    min-width: 0;
  }
  .wordmark__name { font-size: var(--text-lg); letter-spacing: 0.14em; }
  .wordmark__sub { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    display: block;
    margin: 0;
    max-height: calc(100vh - 64px);
    padding: var(--space-3) var(--space-3) var(--space-6);
    background: var(--color-contrast-surface);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
    overflow-y: auto;
    overscroll-behavior: contain;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 0s linear 180ms;
  }
  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 0s linear 0s;
  }

  .site-nav__link {
    padding: 14px var(--space-2);
    font-size: var(--text-base);
    letter-spacing: 0.12em;
  }
  .site-nav__index { font-size: var(--text-sm); }

  .scroll-meter {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    height: 2px;
  }
  .scroll-meter__fill {
    transform: scaleX(var(--p, 0));
    transform-origin: left center;
  }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-brand {
    padding: var(--space-4) var(--space-3);
    border-right: 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }
  .footer-scale { margin-bottom: var(--space-3); }
  .footer-brand__region { margin-top: var(--space-3); }
  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: var(--space-4) var(--space-3);
  }
  .footer-contact { padding: var(--space-3); gap: var(--space-3); }
  .footer-base { padding: var(--space-3); }
}

@media (max-width: 560px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); gap: var(--space-3); }
  .footer-contact__item { min-width: 0; flex: 1 1 100%; }
  .ledger__row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
}

@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;
    scroll-behavior: auto !important;
  }
}