:root {
  --color-surface: #ffffff;
  --color-surface-alt: #f6f6f6;
  --color-surface-deep: #e9eae9;
  --color-ink: #444f48;
  --color-ink-soft: #67756b;
  --color-ink-muted: #79867d;
  --color-line: #dddfde;
  --color-primary: #3d8455;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e4eee7;
  --color-accent: #1e8566;
  --color-accent-ink: #ffffff;
  --color-highlight: #d6e9e3;
  --color-focus: #148562;
  --color-contrast-surface: #19231c;
  --color-contrast-ink: #e4e7e5;
  --color-contrast-line: #464e48;
  --color-contrast-accent: #2fd09f;
  --overlay-scrim: linear-gradient(180deg, rgba(25, 35, 28, 0.35) 0%, rgba(25, 35, 28, 0.72) 55%, rgba(25, 35, 28, 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: 12.2px;
  --text-sm: 14.6px;
  --text-base: 16px;
  --text-lg: 19.2px;
  --text-xl: 23.0px;
  --text-2xl: 27.6px;
  --text-3xl: 33.2px;
  --text-4xl: 39.8px;
  --text-display: clamp(35px, 7.1vw, 91px);
  --text-figure: clamp(29px, 5.2vw, 66px);
  --weight-heading: 616;
  --weight-body: 400;
  --leading-body: 1.78;
  --leading-heading: 1.17;
  --tracking-heading: -0.006em;
  --radius-sm: 14px;
  --radius-md: 17px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(68, 79, 72, 0.08);
  --shadow-2: 0 18px 44px rgba(68, 79, 72, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1280px;
  --measure: 73ch;
  --gutter: 32px;
  --section-y: 66px;
  --section-y-lg: 92px;
}

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

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

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);
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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);
  color: var(--color-ink);
}

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.16s ease;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

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

button { background: none; border: 0; padding: 0; cursor: pointer; }

table { border-collapse: collapse; border-spacing: 0; width: 100%; }

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

[hidden] { display: none !important; }

:target { scroll-margin-top: 132px; }

/* ============ typography helpers ============ */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.display {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.figure {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

/* ============ layout ============ */
.shell {
  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-head {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.section-title { font-size: var(--text-3xl); }

.lede {
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

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

/* ============ skip link ============ */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: calc(-1 * var(--space-8));
  z-index: 200;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: top 0.18s ease;
}

.skip-link:focus {
  top: var(--space-1);
  text-decoration: none;
}

/* ============ site header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}

.spec-rail {
  background: var(--color-surface-alt);
  overflow: hidden;
  max-height: 60px;
  transition: max-height 0.22s ease, opacity 0.22s ease;
}

.spec-rail-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
}

.spec-rail-label {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
}

.spec-facts {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: wrap;
  gap: var(--space-3);
  overflow: hidden;
}

.spec-facts li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
}

.spec-facts li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--color-accent);
  flex: 0 0 auto;
}

.spec-rail-link {
  margin-left: auto;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

.header-shell { padding-block: var(--space-2); }

.nav-pill {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 64px;
  padding: var(--space-1) var(--space-1) var(--space-1) var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.22s ease, border-radius 0.22s ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  color: var(--color-ink);
}

.brand:hover { text-decoration: none; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.15;
}

.brand-text strong {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-text small {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: background 0.16s ease, color 0.16s ease;
}

.nav-list a:hover {
  background: var(--color-highlight);
  color: var(--color-ink);
  text-decoration: none;
}

.nav-list a[aria-current="page"] {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-weight: 600;
}

.nav-list a[aria-current="page"]:hover {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 0 0 auto;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.16s ease, box-shadow 0.16s ease;
}

.nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  text-decoration: none;
  box-shadow: var(--shadow-1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
}

.nav-toggle:hover { background: var(--color-highlight); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.18s ease, top 0.18s ease;
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.nav-pill[data-open="true"] .nav-toggle-bars { background: transparent; }
.nav-pill[data-open="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); }
.nav-pill[data-open="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
}

.site-header[data-scrolled="true"] .scroll-progress { opacity: 0.9; }

.site-header[data-scrolled="true"] .spec-rail {
  max-height: 0;
  opacity: 0;
}

.site-header[data-scrolled="true"] .nav-pill { box-shadow: var(--shadow-2); }

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 13px 22px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  transition: background 0.16s ease, color 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.btn:hover {
  text-decoration: none;
  box-shadow: var(--shadow-1);
}

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

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

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

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

.btn-outline {
  background: var(--color-surface);
  border-color: var(--color-line);
  color: var(--color-ink);
}

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

.btn-quiet {
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

.btn-quiet:hover { background: var(--color-highlight); }

/* ============ bento modules ============ */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-3);
  align-items: start;
}

.bento-cell {
  grid-column: span 6;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-1);
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.bento-cell:hover {
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.bento-cell.span-3 { grid-column: span 3; }
.bento-cell.span-4 { grid-column: span 4; }
.bento-cell.span-5 { grid-column: span 5; }
.bento-cell.span-7 { grid-column: span 7; }
.bento-cell.span-8 { grid-column: span 8; }
.bento-cell.span-12 { grid-column: span 12; }

.bento-cell--focus {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-2);
}

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

.bento-cell--deep {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.bento-cell--deep:hover { background: var(--color-contrast-surface); }

.bento-cell--soft {
  background: var(--color-primary-soft);
  box-shadow: none;
}

.bento-cell--soft:hover { background: var(--color-highlight); }

.bento-cell--quiet {
  background: var(--color-surface-alt);
  box-shadow: none;
}

.bento-cell--quiet:hover { background: var(--color-surface-deep); }

.bento-cell a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.bento-cell--focus a:hover,
.bento-cell--deep a:hover { color: var(--color-contrast-accent); }

.cell-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.bento-cell--focus .cell-kicker,
.bento-cell--deep .cell-kicker { color: var(--color-contrast-accent); }

.cell-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: inherit;
}

.cell-text {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.bento-cell--focus .cell-text,
.bento-cell--deep .cell-text {
  color: inherit;
  opacity: 0.86;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.bento-cell--focus .metric-value { color: var(--color-primary-ink); }
.bento-cell--deep .metric-value { color: var(--color-contrast-accent); }

.metric-unit {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.bento-cell--focus .metric-unit,
.bento-cell--deep .metric-unit { color: inherit; opacity: 0.8; }

/* ============ chips ============ */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
}

.chip--accent {
  background: var(--color-highlight);
  color: var(--color-accent);
}

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

.chip--invert {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

/* ============ media frames ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.media-body {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-4);
  color: var(--color-contrast-ink);
}

.media-caption {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.media-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: var(--space-3);
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ============ folds, tables, lists ============ */
.fold {
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  overflow: hidden;
}

.fold + .fold { margin-top: var(--space-1); }

.fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
}

.fold summary::-webkit-details-marker { display: none; }

.fold summary::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--color-ink-muted);
  border-bottom: 2px solid var(--color-ink-muted);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.fold[open] summary::after { transform: rotate(-135deg); }
.fold summary:hover { background: var(--color-highlight); }

.fold-body {
  padding: 0 var(--space-4) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.spec-table {
  width: 100%;
  font-size: var(--text-sm);
}

.spec-table th {
  padding: var(--space-2);
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-ink);
  background: var(--color-surface-alt);
}

.spec-table th:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.spec-table th:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

.spec-table td {
  padding: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
}

.spec-table tbody tr:nth-child(even) td { background: var(--color-surface-alt); }

/* ============ stat strip & timeline ============ */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-accent);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.timeline-item {
  display: grid;
  grid-template-columns: minmax(64px, auto) 1fr;
  gap: var(--space-3);
  align-items: start;
}

.timeline-marker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-accent);
  padding-top: 4px;
}

/* ============ breadcrumbs, prose ============ */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-ink-muted);
  opacity: 0.6;
}

.breadcrumbs a { color: var(--color-ink-soft); }
.breadcrumbs a:hover { color: var(--color-primary); }

.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.prose h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  font-size: var(--text-2xl);
}

.prose h3 {
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
}

.prose ul, .prose ol {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.prose ul li {
  position: relative;
  padding-left: var(--space-3);
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--color-accent);
}

.prose ol { list-style: decimal; padding-left: var(--space-3); }

/* ============ reveal ============ */
[data-reveal] { transition: opacity 0.34s ease, transform 0.34s ease; }

html.js-ready [data-reveal]:not([data-visible="true"]) {
  opacity: 0;
  transform: translateY(12px);
}

/* ============ site footer ============ */
.site-footer {
  margin-top: var(--space-8);
  padding-block: var(--section-y-lg) var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: flex-end;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  max-width: 44ch;
}

.footer-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.footer-tagline {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-contrast-ink);
}

.footer-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 108px;
}

.footer-stat-value {
  font-size: var(--text-2xl);
  font-weight: 500;
  line-height: 1;
  color: var(--color-contrast-accent);
}

.footer-stat-unit {
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-links a {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.9;
}

.footer-links a:hover {
  color: var(--color-contrast-accent);
  opacity: 1;
}

.footer-links--plain li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  opacity: 0.6;
}

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

.footer-legal-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.footer-legal,
.footer-copy {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

.footer-wordmark {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin: 0;
  padding-top: var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 0.94;
  letter-spacing: -0.035em;
  color: var(--color-contrast-ink);
}

.footer-wordmark-sub {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
}

/* ============ responsive ============ */
@media (max-width: 1080px) {
  .spec-facts li:nth-child(3) { display: none; }
  .nav-list a { padding: 10px 11px; }
}

@media (max-width: 960px) {
  .bento-cell.span-3,
  .bento-cell.span-4,
  .bento-cell.span-5 { grid-column: span 6; }

  .bento-cell.span-7,
  .bento-cell.span-8 { grid-column: span 12; }

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

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

  .nav-pill {
    flex-wrap: wrap;
    border-radius: var(--radius-lg);
    padding: var(--space-1);
    gap: var(--space-1) var(--space-2);
  }

  .brand { margin-right: auto; }

  .nav-actions { margin-left: auto; }

  .nav-list {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.24s ease, opacity 0.24s ease, margin 0.24s ease;
  }

  .nav-pill[data-open="true"] .nav-list {
    max-height: 460px;
    opacity: 1;
    margin-top: var(--space-1);
  }

  .nav-list a {
    justify-content: flex-start;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
  }

  .nav-cta { padding: 12px 16px; }
}

@media (max-width: 760px) {
  :root { --section-y: 48px; --section-y-lg: 64px; }

  .spec-rail { max-height: 52px; }
  .spec-facts { display: none; }
  .spec-rail-inner { justify-content: space-between; }

  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-stats { gap: var(--space-3); }

  .timeline-item { grid-template-columns: 1fr; gap: var(--space-1); }
}

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

  .bento-cell,
  .bento-cell.span-3,
  .bento-cell.span-4,
  .bento-cell.span-5,
  .bento-cell.span-7,
  .bento-cell.span-8 { grid-column: span 12; }

  .bento-cell { padding: var(--space-3); }

  .footer-grid { grid-template-columns: 1fr; }

  .footer-legal-row { flex-direction: column; align-items: flex-start; }

  .footer-wordmark { flex-wrap: wrap; gap: var(--space-2); }

  .nav-toggle-text { display: none; }

  .nav-toggle { padding: 12px 14px; }

  .nav-cta { padding: 11px 14px; font-size: var(--text-xs); }
}

@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.js-ready [data-reveal]:not([data-visible="true"]) {
    opacity: 1;
    transform: none;
  }

  .bento-cell:hover { transform: none; }
}