:root {
  --color-surface: #fafafa;
  --color-surface-alt: #f0f0f0;
  --color-surface-deep: #e1e2e2;
  --color-ink: #2d3430;
  --color-ink-soft: #57615c;
  --color-ink-muted: #737d78;
  --color-line: #d5d6d6;
  --color-primary: #0e864a;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #d9eae1;
  --color-accent: #e40180;
  --color-accent-ink: #ffffff;
  --color-highlight: #f6cde4;
  --color-focus: #db007a;
  --color-contrast-surface: #142b20;
  --color-contrast-ink: #e4e7e5;
  --color-contrast-line: #42544b;
  --color-contrast-accent: #fe39a7;
  --overlay-scrim: linear-gradient(180deg, rgba(20, 43, 32, 0.35) 0%, rgba(20, 43, 32, 0.72) 55%, rgba(20, 43, 32, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 9.8px;
  --text-sm: 14.7px;
  --text-base: 18px;
  --text-lg: 27.0px;
  --text-xl: 40.5px;
  --text-2xl: 60.8px;
  --text-3xl: 91.1px;
  --text-4xl: 136.7px;
  --text-display: clamp(65px, 13.4vw, 171px);
  --text-figure: clamp(54px, 9.6vw, 123px);
  --weight-heading: 846;
  --weight-body: 400;
  --leading-body: 1.68;
  --leading-heading: 1.17;
  --tracking-heading: -0.035em;
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 4px;
  --radius-pill: 4px;
  --border-thin: 1px;
  --border-thick: 3px;
  --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: 1160px;
  --measure: 67ch;
  --gutter: 24px;
  --section-y: 100px;
  --section-y-lg: 140px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  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);
  word-break: break-word;
  overflow-wrap: anywhere;
}

body > main { display: block; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

p { margin: 0 0 var(--space-3); }

ul, ol { margin: 0; padding: 0; list-style: none; }

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

button, input, select, textarea { font: inherit; color: inherit; }

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

table { border-collapse: collapse; width: 100%; }

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

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ============ 工具 ============ */
.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); }

.stack > * + * { margin-top: var(--space-3); }

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

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

.grid > * { grid-column: span 12; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }

/* ============ skip link ============ */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 120;
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  transform: translateY(-260%);
  transition: transform 160ms ease;
  margin: 0;
}

.skip-link:focus { transform: translateY(0); }

/* ============ header ============ */
.site-header {
  position: relative;
  z-index: 40;
  background-color: var(--color-surface);
}

.site-header__status {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.site-header__status-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  padding-block: var(--space-1);
}

.site-header__status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background-color: var(--color-contrast-accent);
  border-radius: var(--radius-sm);
}

.site-header__status-text {
  flex: 1 1 auto;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
}

.site-header__status-meta {
  flex: 0 0 auto;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  line-height: 1.6;
  color: var(--color-contrast-accent);
}

.site-header__masthead {
  position: relative;
  padding-block: var(--space-6) var(--space-4);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.masthead__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.44em;
  text-indent: 0.44em;
  color: var(--color-ink-muted);
}

.masthead__brand {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(calc(var(--text-lg) * 0.9), 6.4vw, var(--text-xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thick) solid var(--color-primary);
  transition: color 160ms ease, border-color 160ms ease;
}

.masthead__brand:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.masthead__sub {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-surface);
  color: var(--color-ink);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

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

.nav-toggle[aria-expanded="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}

.nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle__label { line-height: 1; }

.site-nav {
  background-color: var(--color-surface-alt);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
}

.site-nav__item { display: flex; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  transition: color 180ms ease, background-color 180ms ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 0;
  height: var(--border-thick);
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms ease;
}

.site-nav__link:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-deep);
}

.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--color-primary); }

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background-color: var(--color-accent);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--border-thick);
  z-index: 90;
  background-color: transparent;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 80ms linear;
}

/* ============ 通用组件 ============ */
.section-head {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-6);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.section-head__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  color: var(--color-ink-muted);
}

.section-head__title {
  margin: 0;
  font-size: clamp(calc(var(--text-lg) * 1.1), 4vw, var(--text-xl));
}

.section-head__note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

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

.prose p {
  margin: 0 0 var(--space-3);
  color: var(--color-ink-soft);
}

.prose h2 {
  font-size: var(--text-lg);
  margin: var(--space-6) 0 var(--space-2);
  color: var(--color-ink);
}

.prose h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-base);
  margin: var(--space-4) 0 var(--space-1);
  color: var(--color-ink);
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.prose strong { color: var(--color-ink); font-weight: 700; }

.prose ul, .prose ol {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-4);
  color: var(--color-ink-soft);
}

.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: var(--space-1); }

.prose code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-surface-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.mark-bar {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-3);
}

.mark-bar--accent { border-left-color: var(--color-accent); }
.mark-bar--on-dark { border-left-color: var(--color-contrast-accent); }

.rule-dotted,
.rule-dashed {
  border: 0;
  margin-block: var(--space-6);
}

.rule-dotted { border-top: var(--border-thin) dotted var(--color-line); }
.rule-dashed { border-top: var(--border-thin) dashed var(--color-line); }
.rule-dotted--on-dark { border-top-color: var(--color-contrast-line); }

.slab {
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.slab--surface { background-color: var(--color-surface-alt); color: var(--color-ink); }
.slab--soft { background-color: var(--color-primary-soft); color: var(--color-ink); }
.slab--highlight { background-color: var(--color-highlight); color: var(--color-ink); }
.slab--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.slab--deep { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }

.slab--deep :is(p, li, dt, dd, span, h2, h3, h4, strong, a) { color: inherit; }
.slab--primary :is(p, li, dt, dd, span, h2, h3, h4, strong, a) { color: inherit; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.btn:hover { transform: translateX(2px); }

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

.btn--primary:hover { background-color: var(--color-contrast-surface); }

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

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

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

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

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

.btn--on-dark:hover {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.breadcrumb {
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.breadcrumb__item { display: 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);
  border-bottom: var(--border-thin) dotted var(--color-line);
  transition: color 160ms ease, border-color 160ms ease;
}

.breadcrumb__link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.breadcrumb__current { color: var(--color-ink); }

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0 0 var(--space-3);
}

.tag {
  display: inline-block;
  padding: 4px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  background-color: var(--color-surface);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-sm);
}

.tag--active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  border-style: solid;
  color: var(--color-accent-ink);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  margin-bottom: var(--space-4);
  background-color: var(--color-surface-alt);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.filter-btn {
  padding: 6px var(--space-2);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

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

.filter-btn[aria-pressed="true"] {
  background-color: var(--color-accent);
  border-color: var(--color-focus);
  color: var(--color-accent-ink);
}

.filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

[data-filter-item][hidden] { display: none; }

.stat-figure {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--color-ink);
}

.stat-figure--accent { color: var(--color-accent); }
.stat-figure--on-dark { color: var(--color-contrast-accent); }

.stat-unit {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.figure-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
}

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

.figure-frame--wide { aspect-ratio: 16 / 9; }
.figure-frame--tall { aspect-ratio: 3 / 4; }
.figure-frame--square { aspect-ratio: 1 / 1; }

.figure-frame--tint > img { filter: grayscale(1) contrast(1.08); }

.figure-frame--tint::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 1;
}

.figure-frame__overlay {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}

.figure-frame__overlay :is(p, span, h2, h3, strong) { color: inherit; }

.figure-frame__caption {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 200ms ease, transform 200ms ease;
}

/* ============ footer ============ */
.site-footer {
  margin-top: var(--section-y);
  padding-block: var(--space-8) var(--space-6);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-accent);
}

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

.foot-panel {
  padding: var(--space-4);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 78%, #ffffff);
  border: var(--border-thin) dotted var(--color-contrast-line);
  border-radius: var(--radius-md);
  color: var(--color-contrast-ink);
}

.foot-panel p { margin: 0; }

.foot-panel--brand { grid-column: span 7; }
.foot-panel--contact { grid-column: span 5; }
.foot-panel--spec { grid-column: span 5; }
.foot-panel--nav { grid-column: span 4; }
.foot-panel--legal { grid-column: span 3; }

.foot-panel__label,
.foot-panel__summary {
  display: block;
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.26em;
  line-height: 1.6;
  color: var(--color-contrast-accent);
}

.foot-panel__year {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.foot-panel__year-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(calc(var(--text-xl) * 1.2), 6.6vw, var(--text-3xl));
  line-height: 0.95;
  letter-spacing: -0.05em;
  color: var(--color-contrast-ink);
}

.foot-panel__year-unit {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
}

.foot-panel__note {
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

.foot-panel__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-line);
}

.foot-panel__details > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.foot-panel__details > summary::-webkit-details-marker { display: none; }
.foot-panel__details > summary::marker { content: ""; }

.foot-panel__details > summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: 1;
  color: var(--color-contrast-ink);
  border: var(--border-thin) dotted var(--color-contrast-line);
  border-radius: var(--radius-sm);
}

.foot-panel__details[open] > summary::after {
  content: "–";
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.foot-panel__body { padding-top: var(--space-3); }

.foot-list {
  display: grid;
  gap: var(--space-2);
}

.foot-list--cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-1) var(--space-2); }

.foot-list__row { display: grid; gap: 4px; }

.foot-list__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.foot-list__value {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-contrast-ink);
}

.foot-list__item {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
}

.foot-list dd { margin: 0; }

.foot-link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
  transition: color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.foot-link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
  transform: translateX(3px);
}

/* ============ 响应式 ============ */
@media (max-width: 1099px) {
  .span-3 { grid-column: span 4; }
  .span-5 { grid-column: span 6; }
  .span-7 { grid-column: span 12; }
}

@media (max-width: 899px) {
  :root { --section-y: 72px; --section-y-lg: 96px; }

  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid > *,
  .span-3, .span-4, .span-5, .span-6 { grid-column: span 6; }
  .span-7, .span-8 { grid-column: span 6; }

  .site-header__masthead { padding-block: var(--space-4) var(--space-3); }

  .nav-toggle {
    display: inline-flex;
    position: absolute;
    right: var(--gutter);
    top: var(--space-2);
  }

  .masthead { align-items: center; gap: var(--space-1); }
  .masthead__kicker { letter-spacing: 0.34em; text-indent: 0.34em; }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding-block: var(--space-1);
  }

  .site-nav__item { display: block; }

  .site-nav__link {
    padding: var(--space-2);
    border-left: 4px solid transparent;
    letter-spacing: 0.14em;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link:hover { background-color: var(--color-surface); }

  .site-nav__link[aria-current="page"] {
    background-color: var(--color-surface);
    border-left-color: var(--color-accent);
  }

  .foot-panel--brand,
  .foot-panel--contact,
  .foot-panel--spec { grid-column: span 12; }
  .foot-panel--nav,
  .foot-panel--legal { grid-column: span 6; }
}

@media (max-width: 599px) {
  .grid,
  .site-footer__grid { grid-template-columns: minmax(0, 1fr); }

  .grid > *,
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 1; }

  .foot-panel--brand,
  .foot-panel--contact,
  .foot-panel--spec,
  .foot-panel--nav,
  .foot-panel--legal { grid-column: span 1; }

  .foot-list--cols { grid-template-columns: minmax(0, 1fr); }

  .filter-count { margin-left: 0; }

  .site-header__status-meta { letter-spacing: 0.12em; }
}

@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;
  }

  .js [data-reveal] { opacity: 1; transform: none; }
  .skip-link:focus { transform: translateY(0); }
  .btn:hover { transform: none; }
  .foot-link:hover { transform: none; }
  .scroll-progress__bar { transition: none; }
}