:root {
  --color-surface: #f8f8f8;
  --color-surface-alt: #eeeeee;
  --color-surface-deep: #e0e0e0;
  --color-ink: #34302d;
  --color-ink-soft: #645d58;
  --color-ink-muted: #817974;
  --color-line: #d5d4d3;
  --color-primary: #ba581c;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #efe2d9;
  --color-accent: #1f78c1;
  --color-accent-ink: #ffffff;
  --color-highlight: #d1e1ee;
  --color-focus: #1371bf;
  --color-contrast-surface: #19110c;
  --color-contrast-ink: #e7e5e4;
  --color-contrast-line: #46403c;
  --color-contrast-accent: #2389dc;
  --overlay-scrim: linear-gradient(180deg, rgba(25, 17, 12, 0.35) 0%, rgba(25, 17, 12, 0.72) 55%, rgba(25, 17, 12, 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: 11.0px;
  --text-sm: 14.7px;
  --text-base: 17px;
  --text-lg: 22.7px;
  --text-xl: 30.2px;
  --text-2xl: 40.3px;
  --text-3xl: 53.7px;
  --text-4xl: 71.5px;
  --text-display: clamp(54px, 11.1vw, 142px);
  --text-figure: clamp(45px, 8.0vw, 102px);
  --weight-heading: 818;
  --weight-body: 400;
  --leading-body: 1.61;
  --leading-heading: 1.21;
  --tracking-heading: -0.024em;
  --radius-sm: 3px;
  --radius-md: 5px;
  --radius-lg: 7px;
  --radius-pill: 7px;
  --border-thin: 2px;
  --border-thick: 3px;
  --shadow-1: 4px 4px 0 #34302d;
  --shadow-2: 8px 8px 0 #34302d;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1280px;
  --measure: 70ch;
  --gutter: 24px;
  --section-y: 72px;
  --section-y-lg: 101px;
}

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

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

body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

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

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);
}

p { margin: 0 0 var(--space-3); max-width: var(--measure); }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure, blockquote { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; }
table { width: 100%; border-collapse: collapse; }

a {
  color: var(--color-accent);
  text-decoration-thickness: var(--border-thin);
  text-underline-offset: 3px;
}
a:hover { color: var(--color-primary); }

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

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

/* ============================ layout ============================ */
.container {
  width: min(calc(100% - (var(--gutter) * 2)), var(--container));
  margin-inline: auto;
}

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--space-4); }

.section--contrast {
  background-color: 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 { color: var(--color-contrast-ink); }
.section--contrast a { color: var(--color-contrast-accent); }
.section--contrast a:hover { color: var(--color-primary); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-3);
}
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

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

.slant-top { clip-path: polygon(0 20px, 100% 0, 100% 100%, 0 100%); }
.slant-bottom { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%); }
.offset-panel { margin-left: calc(var(--space-4) * -1); }
.offset-panel--right { margin-right: calc(var(--space-4) * -1); }

.scanlines { position: relative; overflow: hidden; }
.scanlines::after {
  content: "";
  position: absolute;
  inset: -20% 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    0deg,
    color-mix(in srgb, var(--color-contrast-ink) 7%, transparent) 0 1px,
    transparent 1px 5px
  );
  animation: scan-drift 12s linear infinite;
}
@keyframes scan-drift {
  from { transform: translateY(0); }
  to { transform: translateY(60px); }
}

/* ============================ typography ============================ */
.t-display {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.92;
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.figure-hero {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 0.88;
  letter-spacing: -0.045em;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  margin: 0;
}

.t-h1 { font-size: var(--text-4xl); margin: 0 0 var(--space-3); }
.t-h2 { font-size: var(--text-3xl); margin: 0 0 var(--space-3); }
.t-h3 { font-size: var(--text-2xl); margin: 0 0 var(--space-2); }
.t-h4 { font-size: var(--text-xl); margin: 0 0 var(--space-2); }
.t-h5 { font-size: var(--text-lg); margin: 0 0 var(--space-2); }
.t-body { font-size: var(--text-base); }

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}
.section--contrast .eyebrow { color: var(--color-contrast-accent); }

.lede {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}
.section--contrast .lede { color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent); }

.note {
  font-size: var(--text-sm);
  line-height: 1.45;
  color: var(--color-ink-muted);
  margin: 0;
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-2xl); margin: var(--space-6) 0 0; }
.prose h3 { font-size: var(--text-xl); margin: var(--space-4) 0 0; }
.prose p { margin: 0; }
.prose ul > li {
  position: relative;
  padding-left: var(--space-3);
  margin-bottom: var(--space-1);
}
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 12px;
  height: var(--border-thin);
  background-color: var(--color-primary);
}
.section--contrast .prose ul > li::before { background-color: var(--color-contrast-accent); }

/* ============================ buttons ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--color-ink);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease,
              background-color 140ms ease, color 140ms ease;
}
.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-2);
  color: var(--color-ink);
}
.btn:active { transform: translate(1px, 1px); box-shadow: none; }

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

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

.btn--ghost {
  background-color: transparent;
  box-shadow: none;
}
.btn--ghost:hover {
  background-color: var(--color-primary-soft);
  transform: none;
  box-shadow: none;
}

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

.btn--sm {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

/* ============================ tags ============================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid transparent;
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  text-decoration: none;
}
.tag--live {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.tag--accent {
  background-color: var(--color-highlight);
  color: var(--color-accent);
}
.tag--outline {
  background-color: transparent;
  border-color: var(--color-line);
  color: var(--color-ink-soft);
}

/* ============================ breadcrumb ============================ */
.crumb { padding-block: var(--space-3); }
.crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.crumb li { display: flex; align-items: center; gap: var(--space-2); }
.crumb li + li::before {
  content: "／";
  color: var(--color-line);
}
.crumb a { color: var(--color-ink-soft); text-decoration: none; }
.crumb a:hover { color: var(--color-primary); }
.crumb [aria-current="page"] { color: var(--color-primary); font-weight: 700; }

/* ============================ panels ============================ */
.panel {
  background-color: var(--color-surface-alt);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
}
.panel--deep { background-color: var(--color-surface-deep); }
.panel--contrast {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}
.panel--contrast h2,
.panel--contrast h3,
.panel--contrast p { color: var(--color-contrast-ink); }
.panel--flat { box-shadow: none; }

/* ============================ collapse ============================ */
.collapse { border-bottom: var(--border-thin) solid var(--color-line); }
.collapse__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  transition: color 140ms ease;
}
.collapse__head::-webkit-details-marker { display: none; }
.collapse__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-primary);
}
.collapse__head:hover { color: var(--color-primary); }
.collapse[open] > .collapse__head { color: var(--color-primary); }
.collapse[open] > .collapse__head::after { content: "–"; }
.collapse__body { padding: 0 0 var(--space-4); }
.section--contrast .collapse { border-bottom-color: var(--color-contrast-line); }
.section--contrast .collapse__head { color: var(--color-contrast-ink); }
.section--contrast .collapse[open] > .collapse__head { color: var(--color-contrast-accent); }
.section--contrast .collapse[open] > .collapse__head::after { color: var(--color-contrast-accent); }

/* ============================ index list ============================ */
.index-list { border-top: var(--border-thin) solid var(--color-line); }
.index-list__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.index-list__key {
  flex: 0 0 auto;
  min-width: 4ch;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}
.index-list__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.index-list__item a { text-decoration: none; color: inherit; }
.index-list__item a:hover .index-list__title { color: var(--color-primary); }
.index-list__meta {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

/* ============================ data ============================ */
.data-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.data-row__value {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}
.data-row__unit { font-size: var(--text-sm); color: var(--color-ink-muted); }
.data-row__meta { font-size: var(--text-xs); color: var(--color-ink-muted); }
.section--contrast .data-row__value { color: var(--color-contrast-accent); }
.section--contrast .data-row__unit,
.section--contrast .data-row__meta { color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent); }

.meter {
  height: var(--space-1);
  background-color: var(--color-surface-deep);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.meter__fill {
  display: block;
  height: 100%;
  width: 0;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 600ms ease;
}
.section--contrast .meter { background-color: var(--color-contrast-line); }

/* ============================ media ============================ */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--color-surface-deep);
  border-radius: 0;
}
.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  filter: saturate(1.04) contrast(1.04);
}
.media--hero { aspect-ratio: 21 / 9; }
.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}
.media__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}
.media__overlay h3,
.media__overlay p { color: var(--color-contrast-ink); margin: 0; max-width: 46ch; }
.media__badge { position: absolute; top: var(--space-2); left: var(--space-2); z-index: 2; }
.media__caption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ============================ header ============================ */
.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-3);
  z-index: 200;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  color: var(--color-contrast-ink);
  background-color: var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  transform: translateY(-220%);
  transition: transform 160ms ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding-top: var(--space-2);
  background-image: linear-gradient(
    180deg,
    var(--color-surface) 0%,
    color-mix(in srgb, var(--color-surface) 80%, transparent) 64%,
    transparent 100%
  );
}

.scroll-meter {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--border-thin);
  transform: scaleX(0);
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: min(calc(100% - (var(--gutter) * 2)), var(--container));
  margin-inline: auto;
  padding: var(--space-2) var(--space-3);
  transition: padding 180ms ease;
}
.header-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--color-ink);
}
.brand__mark {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  height: 44px;
  padding-inline: var(--space-1);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 11px), calc(100% - 11px) 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; }
.brand__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.05;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.brand__tagline {
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-ink-muted);
  transition: opacity 140ms ease;
}

.site-nav {
  display: flex;
  flex: 1 1 auto;
  justify-content: center;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}
.site-nav__link {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-bottom: var(--border-thin) solid transparent;
  transition: color 140ms ease, background-color 140ms ease, border-color 140ms ease;
}
.site-nav__link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}
.site-nav__link[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.header-utility {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  margin-left: auto;
}
.header-ticker {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  white-space: nowrap;
}
.header-ticker__label { letter-spacing: 0.16em; }
.header-ticker__value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-ink);
  background-color: var(--color-contrast-surface);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: var(--border-thin);
  background-color: currentColor;
  transition: transform 180ms ease, top 180ms ease, bottom 180ms ease;
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

.region-band {
  position: relative;
  margin-top: var(--space-1);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 10px));
}
.region-band__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: min(calc(100% - (var(--gutter) * 2)), var(--container));
  margin-inline: auto;
  padding-block: var(--space-2) calc(var(--space-2) + 10px);
  overflow-x: auto;
  scrollbar-width: thin;
}
.region-band__label {
  flex: 0 0 auto;
  padding: 2px var(--space-2);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
}
.region-band__list {
  display: flex;
  gap: var(--space-1);
  flex: 0 0 auto;
}
.region-band__item {
  flex: 0 0 auto;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-primary-ink);
  background-color: transparent;
  border: var(--border-thin) solid var(--color-primary-ink);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, transform 140ms ease;
}
.region-band__item:hover {
  background-color: var(--color-primary-ink);
  color: var(--color-primary);
}
.region-band__item[aria-pressed="true"] {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  transform: translateY(-2px);
}
.region-band__meta {
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary-ink);
}

.site-header.is-condensed .header-inner { padding-block: var(--space-1); }
.site-header.is-condensed .brand__tagline { opacity: 0; }
.site-header.is-condensed .region-band__inner {
  padding-block: var(--space-1) calc(var(--space-1) + 10px);
}

/* ============================ footer ============================ */
.site-footer {
  margin-top: var(--section-y-lg);
  background-color: var(--color-surface-alt);
}

.footer-upper {
  position: relative;
  z-index: 2;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}
.footer-upper::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(80px, 14vw, 190px);
  height: var(--space-6);
  background-color: var(--color-primary);
  transform: skewX(-18deg) translateX(30px);
  pointer-events: none;
}
.footer-upper__inner {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  width: min(calc(100% - (var(--gutter) * 2)), var(--container));
  margin-inline: auto;
  padding-block: var(--space-8) calc(var(--space-8) + var(--space-2));
  position: relative;
  z-index: 1;
}

.footer-brand { grid-column: span 3; position: relative; padding-left: var(--space-3); }
.footer-brand::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 6px;
  background-color: var(--color-primary);
  transform: skewY(-14deg);
}
.footer-brand__mark {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}
.footer-brand__tagline {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.footer-index { grid-column: span 3; }
.footer-index__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}
.footer-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}
.footer-link {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  transition: color 140ms ease, border-color 140ms ease;
}
.footer-link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.footer-chip {
  display: inline-block;
  padding: 1px var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-sm);
}
.footer-note {
  grid-column: span 3;
  margin: 0;
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-contrast-accent);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
  max-width: 34ch;
}

.footer-lower {
  position: relative;
  z-index: 1;
  width: min(100%, var(--container));
  margin-left: auto;
  margin-top: calc(var(--space-3) * -1);
  padding-block: calc(var(--space-4) + var(--space-4)) var(--space-4);
  background-color: var(--color-surface-deep);
}
.footer-lower__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  width: min(calc(100% - (var(--gutter) * 2)), var(--container));
  margin-inline: auto;
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-legal a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-legal a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-contact__value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

/* ============================ motion ============================ */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 520ms ease, transform 520ms ease;
}
html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================ responsive ============================ */
@media (max-width: 1120px) {
  .footer-brand,
  .footer-index { grid-column: span 6; }
  .footer-note { grid-column: span 12; max-width: var(--measure); }
}

@media (max-width: 1023px) {
  :root { --gutter: 20px; }
  .span-3, .span-4, .span-6, .span-8, .span-9 { grid-column: span 12; }
  .offset-panel, .offset-panel--right { margin-left: 0; margin-right: 0; }
  .brand__name { font-size: var(--text-base); }
  .header-ticker { display: none; }
  .region-band__meta { display: none; }
}

@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + var(--space-2));
    z-index: 5;
    display: none;
    padding: var(--space-2);
    background-color: var(--color-contrast-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-2);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    display: block;
    padding: var(--space-2);
    font-size: var(--text-base);
    color: var(--color-contrast-ink);
    border-radius: 0;
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }
  .site-nav__list li:last-child .site-nav__link { border-bottom: 0; }
  .site-nav__link:hover {
    background-color: var(--color-contrast-line);
    color: var(--color-contrast-ink);
  }
  .site-nav__link[aria-current="page"] {
    color: var(--color-contrast-accent);
    background-color: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
    border-bottom-color: var(--color-contrast-line);
  }

  .footer-brand,
  .footer-index,
  .footer-note { grid-column: span 12; }
  .footer-lower { width: 100%; margin-top: calc(var(--space-2) * -1); }
  .footer-upper { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 0 100%); }
  .footer-upper__inner { padding-block: var(--space-6) calc(var(--space-6) + var(--space-2)); }
}

@media (max-width: 599px) {
  .header-inner { gap: var(--space-2); padding-inline: var(--space-2); }
  .brand__tagline { display: none; }
  .brand__mark { min-width: 38px; height: 38px; }
  .btn--sm { padding: 6px var(--space-2); }
  .region-band__item { padding: 6px var(--space-2); }
  .footer-note { padding-left: var(--space-2); }
  .footer-lower__inner { flex-direction: column; }
  .footer-contact { font-size: var(--text-xs); }
}

/* ============================ motion & focus safety ============================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
  .scanlines::after { animation: none; }
  html.js [data-reveal] { opacity: 1; transform: none; }
  .scroll-meter, .meter__fill { transition: none !important; }
}