:root {
  --color-surface: #fefefe;
  --color-surface-alt: #f5f5f5;
  --color-surface-deep: #e8e9e9;
  --color-ink: #444d50;
  --color-ink-soft: #657176;
  --color-ink-muted: #778388;
  --color-line: #dddedf;
  --color-primary: #347d98;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e2ecf0;
  --color-accent: #d42b77;
  --color-accent-ink: #ffffff;
  --color-highlight: #f6d8e6;
  --color-focus: #dc1e73;
  --color-contrast-surface: #11181b;
  --color-contrast-ink: #e4e6e7;
  --color-contrast-line: #3f4548;
  --color-contrast-accent: #da498a;
  --overlay-scrim: linear-gradient(180deg, rgba(17, 24, 27, 0.35) 0%, rgba(17, 24, 27, 0.72) 55%, rgba(17, 24, 27, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 10.7px;
  --text-sm: 13.4px;
  --text-base: 15px;
  --text-lg: 18.8px;
  --text-xl: 23.4px;
  --text-2xl: 29.3px;
  --text-3xl: 36.6px;
  --text-4xl: 45.8px;
  --text-display: clamp(34px, 5.7vw, 73px);
  --text-figure: clamp(28px, 4.1vw, 53px);
  --weight-heading: 657;
  --weight-body: 400;
  --leading-body: 1.8;
  --leading-heading: 1.18;
  --tracking-heading: -0.007em;
  --radius-sm: 5px;
  --radius-md: 7px;
  --radius-lg: 9px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: 0 1px 0 rgba(68, 77, 80, 0.12);
  --shadow-2: 0 2px 0 rgba(68, 77, 80, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1200px;
  --measure: 70ch;
  --gutter: 16px;
  --section-y: 73px;
  --section-y-lg: 102px;
}

/* ============ reset ============ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 128px;
}

body {
  margin: 0;
  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;
  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);
  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); }

p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-primary);
  text-decoration-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
  text-underline-offset: 3px;
}

a:hover { text-decoration-color: var(--color-accent); }

ul, ol { margin: 0 0 var(--space-2); padding-left: 1.2em; }

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

button { font: inherit; color: inherit; }

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

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.measure { max-width: var(--measure); }

.label-mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.header-status .label-mono,
.site-footer .label-mono {
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, var(--color-contrast-surface));
}

.rule-dotted {
  border: 0;
  border-top: var(--border-thin) dotted var(--color-line);
  margin-block: var(--space-3);
}

/* ============ 跳过链接 ============ */
.skip-link {
  position: absolute;
  top: -120px;
  left: var(--space-2);
  z-index: 300;
  display: inline-block;
  padding: 10px 16px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: top 180ms ease;
}

.skip-link:focus { top: var(--space-2); }

/* ============ 头部 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.header-status {
  position: relative;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.header-status__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-3);
  min-height: 36px;
  padding-block: 6px;
}

.header-status__tail { margin-left: auto; }

.scroll-meter {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-contrast-line);
}

.scroll-meter__fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--color-primary);
}

.header-main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-ink);
}

.brand__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1;
}

.brand__text { display: block; }

.brand__name {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.brand__strapline {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.nav-toggle {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 13px;
  background: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}

.nav-toggle:hover { border-color: var(--color-primary); color: var(--color-primary); }

.nav-toggle[aria-expanded="true"] {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
  color: var(--color-primary);
}

.nav-toggle__bars {
  display: block;
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 5px 0 currentColor, 0 -5px 0 currentColor;
}

/* ============ 导航 ============ */
.site-nav {
  background: var(--color-surface-deep);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.nav-axis-label {
  margin: 0;
  padding-top: var(--space-2);
  text-align: center;
}

.nav-list {
  display: flex;
  align-items: stretch;
  gap: var(--space-1);
  margin: 0;
  padding: 0 0 var(--space-2);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.nav-list__item { flex: none; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 14px 9px 12px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.nav-link::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border: var(--border-thin) solid var(--color-ink-muted);
  border-radius: var(--radius-pill);
  background: transparent;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.nav-link:hover {
  background: var(--color-surface);
  border-color: var(--color-line);
}

.nav-link[aria-current="page"] {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 34%, transparent);
  color: var(--color-primary);
}

.nav-link[aria-current="page"]::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* ============ 页脚 ============ */
.site-footer {
  margin-top: var(--section-y-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 1.15fr 1fr;
  gap: var(--space-6);
  padding-block: var(--section-y) var(--space-6);
}

.footer-block { min-width: 0; }

.footer-block__title {
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-contrast-ink);
}

.footer-axis {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--space-3);
  list-style: none;
}

.footer-axis::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  bottom: 0.5em;
  width: 2px;
  background: var(--color-contrast-line);
}

.footer-axis__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.footer-axis__item + .footer-axis__item { margin-top: var(--space-2); }

.footer-axis__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3) + 1px);
  top: 0.62em;
  width: 9px;
  height: 9px;
  transform: translate(-50%, -50%);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
}

.footer-axis__time {
  flex: none;
  min-width: 2.4em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: color-mix(in srgb, var(--color-contrast-ink) 56%, var(--color-contrast-surface));
}

.footer-axis__link {
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 180ms ease, color 180ms ease;
}

.footer-axis__link:hover {
  border-bottom-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.footer-spec {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-spec__row {
  display: grid;
  grid-template-columns: 4.4em 1fr;
  gap: var(--space-2);
  padding-block: var(--space-1);
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, var(--color-contrast-surface));
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1) var(--space-2);
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
}

.footer-links a {
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  transition: border-color 180ms ease, color 180ms ease;
}

.footer-links a:hover {
  border-bottom-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.footer-contact,
.footer-address,
.footer-icp {
  margin: 0 0 var(--space-1);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

.footer-contact { font-family: var(--font-mono); letter-spacing: 0.02em; }

.footer-icp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface));
}

.footer-mega {
  overflow: hidden;
  padding-block: var(--space-6) var(--space-4);
  border-top: var(--border-thin) dotted var(--color-contrast-line);
}

.footer-mega__line {
  max-width: 32ch;
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 3.2vw, var(--text-2xl));
  line-height: 1.28;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.footer-mega__brand {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-4xl), 8.6vw, calc(var(--text-4xl) * 1.9));
  line-height: 0.94;
  letter-spacing: -0.02em;
  white-space: nowrap;
  color: color-mix(in srgb, var(--color-primary) 58%, var(--color-contrast-surface));
}

.footer-base {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-1) var(--space-4);
  padding-block: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface));
}

.footer-base__inner p { margin: 0; }

.to-top {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 11px 16px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 200ms ease, transform 200ms ease, visibility 200ms ease, border-color 160ms ease;
}

.to-top::before {
  content: "\2191";
  font-size: var(--text-sm);
  line-height: 1;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover { border-color: var(--color-primary); }

/* ============ 通用组件 ============ */
.panel {
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-line), var(--shadow-1);
}

.panel--tint { background: var(--color-surface-alt); }

.panel--deep {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-contrast-line);
}

.panel--deep h2,
.panel--deep h3,
.panel--deep h4 { color: var(--color-contrast-ink); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  background: var(--color-highlight);
  color: color-mix(in srgb, var(--color-accent) 62%, var(--color-ink));
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.keymark {
  background: var(--color-highlight);
  box-shadow: inset 0 -0.42em 0 var(--color-highlight);
  color: var(--color-ink);
}

.u-accent {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--border-thick);
  text-underline-offset: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 11px 20px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.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-contrast-surface));
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--accent:hover {
  background: color-mix(in srgb, var(--color-accent) 84%, var(--color-contrast-surface));
}

.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.stat {
  padding: var(--space-2);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-line);
}

.stat__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.stat__label {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.stat--hero .stat__value {
  font-size: var(--text-figure);
  color: var(--color-contrast-ink);
}

.stat--hero {
  background: transparent;
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-contrast-line);
}

.stat--hero .stat__label {
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-deep);
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-line);
}

.media-frame > img,
.media-frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame > img {
  filter: grayscale(1) contrast(1.06);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: color-mix(in srgb, var(--color-primary) 44%, transparent);
  mix-blend-mode: multiply;
}

.media-frame--accent::after { background: color-mix(in srgb, var(--color-accent) 40%, transparent); }
.media-frame--night::after { background: color-mix(in srgb, var(--color-contrast-surface) 62%, transparent); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  padding: var(--space-2);
  background: var(--overlay-scrim);
}

.media-frame__caption {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
}

.toc {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc__link {
  display: block;
  padding: 6px 0 6px var(--space-2);
  border-left: var(--border-thick) solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease;
}

.toc__link:hover { color: var(--color-primary); }

.toc__link[aria-current="true"] {
  border-left-color: var(--color-accent);
  color: var(--color-ink);
}

.tl-axis {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--space-4);
  list-style: none;
}

.tl-axis::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-line);
}

.tl-axis__item { position: relative; }

.tl-axis__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4) + 6px);
  top: 0.6em;
  width: 12px;
  height: 12px;
  transform: translate(-50%, -50%);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  box-shadow: 0 0 0 3px var(--color-surface);
}

.tl-axis__item--square::before {
  border-radius: 2px;
  background: var(--color-accent);
}

.tl-axis__time {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

/* ============ 显现 ============ */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-6) var(--space-4); }
  .footer-block:first-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 96px; }

  .header-main {
    justify-content: space-between;
    padding-block: var(--space-2);
  }

  .nav-toggle {
    position: static;
    transform: none;
    display: inline-flex;
  }

  .site-nav { display: none; }
  .site-nav[data-open] { display: block; }

  .nav-axis-label {
    padding-top: var(--space-2);
    text-align: left;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding-bottom: var(--space-2);
    overflow-x: visible;
  }

  .nav-list__item + .nav-list__item { border-top: var(--border-thin) dotted var(--color-line); }

  .nav-link {
    display: flex;
    width: 100%;
    padding: 13px 2px;
    border-radius: 0;
    border-color: transparent;
    font-size: var(--text-base);
  }

  .nav-link:hover { background: transparent; border-color: transparent; }
  .nav-link[aria-current="page"] { background: transparent; }

  .nav-link::before { width: 9px; height: 9px; }

  .footer-mega__brand { white-space: normal; }
}

@media (max-width: 640px) {
  .shell { padding-inline: var(--space-2); }

  .header-status__inner { gap: var(--space-1) var(--space-2); }
  .header-status__tail { display: none; }

  .brand__mark { width: 34px; height: 34px; font-size: var(--text-base); }
  .brand__name { font-size: var(--text-lg); }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr; }
  .footer-spec__row { grid-template-columns: 3.6em 1fr; }

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

  .to-top { right: var(--space-2); bottom: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}