:root {
  --color-surface: #fdfdfd;
  --color-surface-alt: #f4f4f4;
  --color-surface-deep: #e7e8e8;
  --color-ink: #424b4c;
  --color-ink-soft: #677374;
  --color-ink-muted: #798586;
  --color-line: #dbdddd;
  --color-primary: #3a8088;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e2eced;
  --color-accent: #138667;
  --color-accent-ink: #ffffff;
  --color-highlight: #d3e8e2;
  --color-focus: #0a8060;
  --color-contrast-surface: #0f1616;
  --color-contrast-ink: #e4e7e7;
  --color-contrast-line: #3e4444;
  --color-contrast-accent: #1fe0ac;
  --overlay-scrim: linear-gradient(180deg, rgba(15, 22, 22, 0.35) 0%, rgba(15, 22, 22, 0.72) 55%, rgba(15, 22, 22, 0.92) 100%);
  --font-heading: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 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(34px, 5.6vw, 72px);
  --text-figure: clamp(28px, 4.1vw, 52px);
  --weight-heading: 600;
  --weight-body: 400;
  --leading-body: 1.72;
  --leading-heading: 1.21;
  --tracking-heading: -0.006em;
  --radius-sm: 7px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(66, 75, 76, 0.08);
  --shadow-2: 0 18px 44px rgba(66, 75, 76, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1120px;
  --measure: 73ch;
  --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;
  scroll-padding-top: calc(var(--space-8) * 2);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  letter-spacing: 0.01em;
  color: var(--color-ink);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}

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

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }

h1, h2, h3, h4, h5, h6 {
  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;
}

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

/* ============ layout ============ */
.container {
  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(--space-3);
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.section {
  padding-block: var(--section-y);
}

.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--space-6); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }

.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,
.section--contrast li { color: var(--color-contrast-ink); }

/* ============ print-like dividers ============ */
.rule {
  border: 0;
  border-top: calc(var(--border-thin) * 2) solid var(--color-line);
  margin: 0;
}

.rule--double {
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  height: calc(var(--border-thin) * 4);
  background: transparent;
}

.section--contrast .rule,
.section--contrast .rule--double {
  border-top-color: var(--color-contrast-line);
  border-bottom-color: var(--color-contrast-line);
}

/* ============ typography helpers ============ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.eyebrow::before {
  content: "";
  width: var(--space-4);
  height: calc(var(--border-thin) * 2);
  background-color: var(--color-primary);
}

.section--contrast .eyebrow { color: var(--color-contrast-accent); }
.section--contrast .eyebrow::before { background-color: var(--color-contrast-accent); }

.section-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
}

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

.section--contrast .lede { color: var(--color-contrast-ink); }

.note {
  border-left: calc(var(--border-thin) * 3) solid var(--color-accent);
  background-color: var(--color-primary-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-2) var(--space-3);
  color: var(--color-ink);
  max-width: var(--measure);
}

.section--contrast .note {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 8%, var(--color-contrast-surface));
  border-left-color: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
}

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background-color 0.18s ease-out, color 0.18s ease-out, border-color 0.18s ease-out;
}

.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)); }

.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)); }

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

/* ============ breadcrumb ============ */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  padding-block: var(--space-2);
}

.crumb a:hover { color: var(--color-accent); }
.crumb li:not(:last-child)::after { content: "/"; margin-left: var(--space-1); color: var(--color-line); }
.crumb [aria-current="page"] { color: var(--color-ink-soft); }

/* ============ cards ============ */
.card {
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-1);
}

.card--raised { box-shadow: var(--shadow-2); }
.card-stack { display: grid; gap: var(--space-2); }

.section--contrast .card {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 6%, var(--color-contrast-surface));
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: border-color 0.18s ease-out, color 0.18s ease-out, background-color 0.18s ease-out;
}

.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }

.chip[aria-pressed="true"],
.chip.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

/* ============ accordion ============ */
.accordion {
  border-top: calc(var(--border-thin) * 2) solid var(--color-line);
}

.accordion__item {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.accordion__trigger {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) 0;
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-ink);
  transition: color 0.18s ease-out;
}

.accordion__trigger::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-primary);
  line-height: 1;
  transition: color 0.18s ease-out;
}

.accordion__trigger[aria-expanded="true"]::after { content: "−"; color: var(--color-accent); }
.accordion__trigger:hover { color: var(--color-accent); }

.accordion__panel {
  padding-bottom: var(--space-3);
  padding-left: var(--space-3);
  border-left: calc(var(--border-thin) * 3) solid var(--color-highlight);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.accordion__panel[hidden] { display: none; }

/* ============ data strip / metrics ============ */
.data-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-6);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  border-left: calc(var(--border-thin) * 3) solid var(--color-contrast-accent);
}

.data-strip__item { display: flex; flex-direction: column; gap: 2px; }

.data-strip__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xl);
  color: var(--color-contrast-accent);
  line-height: 1.1;
}

.data-strip__label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

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

.metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-primary);
}

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

.section--contrast .metric__value { color: var(--color-contrast-accent); }
.section--contrast .metric__label { color: var(--color-contrast-ink); opacity: 0.7; }

/* ============ spec table ============ */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  background-color: var(--color-surface);
}

.spec-table th {
  background-color: var(--color-surface-deep);
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-soft);
  padding: var(--space-2) var(--space-2);
  border-bottom: calc(var(--border-thin) * 2) solid var(--color-line);
  white-space: nowrap;
}

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

.spec-table td.num,
.spec-table th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.spec-table td.num { color: var(--color-primary); }

/* ============ media band (image container base) ============ */
.media-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
}

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

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

.media-band--overlay {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 240px;
}

.media-band--overlay > img,
.media-band--overlay > .media-band__scrim,
.media-band--overlay > .media-band__body { grid-area: 1 / 1; }

.media-band--overlay > img { width: 100%; height: 100%; object-fit: cover; }

.media-band__body {
  position: relative;
  z-index: 1;
  align-self: end;
  padding: var(--space-4);
  color: var(--color-contrast-ink);
}

.media-band__body h2,
.media-band__body h3 { color: var(--color-contrast-ink); }
.media-band__body p { color: var(--color-contrast-ink); }

/* ============ rail (sticky index) ============ */
.rail {
  position: sticky;
  top: calc(var(--space-8) * 2);
  align-self: start;
  display: grid;
  gap: var(--space-1);
  padding-block: var(--space-1);
}

.rail__link {
  display: block;
  padding: var(--space-1) var(--space-2);
  border-left: calc(var(--border-thin) * 2) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}

.rail__link:hover { color: var(--color-primary); border-left-color: var(--color-primary); }

.rail__link[aria-current="true"] {
  border-left-color: var(--color-accent);
  color: var(--color-accent);
  font-weight: 500;
}

/* ============ horizontal scroll band ============ */
.scroll-band {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-2);
}

.scroll-band > * {
  flex: 0 0 clamp(240px, 46%, 360px);
  scroll-snap-align: start;
}

.scroll-band::-webkit-scrollbar { height: 6px; }
.scroll-band::-webkit-scrollbar-thumb { background-color: var(--color-line); border-radius: var(--radius-pill); }

/* ============ header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: calc(var(--border-thin) * 2) solid var(--color-line);
}

.skip-link {
  position: absolute;
  left: 50%;
  top: var(--space-1);
  transform: translate(-50%, -180%);
  z-index: 60;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  transition: transform 0.18s ease-out;
}

.skip-link:focus { transform: translate(-50%, 0); }

.masthead {
  text-align: center;
  padding: var(--space-3) var(--space-3) var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.masthead__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.masthead__wordmark {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.14em;
  color: var(--color-ink);
  line-height: 1.1;
}

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

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

.nav-bar { position: relative; }

.nav-bar__inner {
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-1) var(--space-3) calc(var(--space-1) + 2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-soft);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: calc(var(--border-thin) * 2);
  background-color: currentColor;
  border-radius: var(--radius-pill);
}

.nav-toggle[aria-expanded="true"] { color: var(--color-accent); }

.primary-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-list::-webkit-scrollbar { display: none; }

.nav-list__link {
  display: inline-block;
  white-space: nowrap;
  padding: var(--space-1) 0;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  border-bottom: calc(var(--border-thin) * 2) solid transparent;
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}

.nav-list__link:hover {
  color: var(--color-ink);
  border-bottom-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
}

.nav-list__link[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.nav-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 0.18s ease-out;
}

.nav-cta:hover { background-color: var(--color-accent); }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(var(--border-thin) * 3);
  background-color: transparent;
  overflow: hidden;
}

.scroll-meter span {
  display: block;
  width: 0;
  height: 100%;
  background-color: var(--color-accent);
}

/* ============ footer ============ */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-top: var(--space-8);
}

.footer-inner { padding-bottom: 0; }

.footer-mark { border-bottom: calc(var(--border-thin) * 2) solid var(--color-contrast-line); padding-bottom: var(--space-6); }

.footer-mark__word {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(calc(var(--text-4xl) * 0.72), 9.2vw, calc(var(--text-4xl) * 2.1));
  line-height: 0.94;
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
}

.footer-mark__note {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-ink);
  opacity: 0.68;
}

.footer-mark::after {
  content: "";
  display: block;
  width: clamp(64px, 12vw, 168px);
  height: calc(var(--border-thin) * 3);
  background-color: var(--color-contrast-accent);
  margin-top: var(--space-3);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4) var(--space-6);
  padding-block: var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-2);
}

.footer-links { display: grid; gap: var(--space-1); }

.footer-links li { font-size: var(--text-sm); color: var(--color-contrast-ink); }

.footer-links a {
  display: inline-block;
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}

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

.footer-links--plain li { opacity: 0.8; }
.footer-note { font-size: var(--text-xs); opacity: 0.62; }

.district-strip {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-2);
  padding-block: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

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

.district::before {
  content: "";
  display: block;
  height: calc(var(--space-1) / 2);
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-accent);
}

.district:nth-child(1)::before { background-color: var(--color-contrast-accent); }
.district:nth-child(2)::before { background-color: var(--color-primary); }
.district:nth-child(3)::before { background-color: color-mix(in srgb, var(--color-contrast-accent) 68%, var(--color-contrast-surface)); }
.district:nth-child(4)::before { background-color: color-mix(in srgb, var(--color-primary) 78%, var(--color-contrast-surface)); }
.district:nth-child(5)::before { background-color: color-mix(in srgb, var(--color-accent) 82%, var(--color-contrast-surface)); }
.district:nth-child(6)::before { background-color: color-mix(in srgb, var(--color-contrast-accent) 42%, var(--color-contrast-surface)); }

.district__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
}

.district__name {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-3) var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-xs);
}

.footer-base__item { color: var(--color-contrast-ink); opacity: 0.66; }
.footer-icp { opacity: 0.8; color: var(--color-contrast-accent); }

/* ============ reveal ============ */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

html.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.24s ease-out, transform 0.24s ease-out;
}

/* ============ tablets ============ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .district-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 861px) {
  .nav-bar__inner { justify-content: center; }
  .primary-nav { flex: 0 1 auto; }
  .nav-cta { position: absolute; right: var(--space-3); top: 50%; transform: translateY(-50%); }

  .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; }
  .span-12 { grid-column: span 12; }
}

/* ============ mobile ============ */
@media (max-width: 860px) {
  .masthead { padding: var(--space-2) var(--space-2) var(--space-2); }

  .masthead__wordmark { font-size: var(--text-xl); letter-spacing: 0.1em; }

  .nav-bar__inner {
    flex-wrap: wrap;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2) calc(var(--space-1) + 2px);
  }

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

  .primary-nav {
    order: 3;
    flex: 0 0 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.22s ease-out;
    border-top: var(--border-thin) solid var(--color-line);
  }

  .primary-nav[data-open] {
    max-height: min(70vh, 520px);
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    padding-block: var(--space-1);
  }

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

  .nav-list__link {
    display: block;
    padding: var(--space-2) var(--space-2);
    border-bottom: 0;
    border-left: calc(var(--border-thin) * 3) solid transparent;
    font-size: var(--text-base);
  }

  .nav-list__link:hover { border-bottom-color: transparent; border-left-color: var(--color-primary); }

  .nav-list__link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--color-accent);
    background-color: var(--color-primary-soft);
  }

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

  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--section-y); }

  .footer-grid { grid-template-columns: 1fr; padding-block: var(--space-6); }
  .district-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { justify-content: flex-start; }

  .data-strip { gap: var(--space-2) var(--space-4); padding: var(--space-2) var(--space-3); }
  .data-strip__value { font-size: var(--text-lg); }

  .rail { position: static; top: auto; }
  .scroll-band > * { flex-basis: 78%; }
}

@media (max-width: 600px) {
  .container { padding-inline: var(--space-2); }
  .grid-12 { gap: var(--space-2); }
  .section-title { font-size: var(--text-2xl); }
  .lede { font-size: var(--text-base); }
  .card { padding: var(--space-2); }
  .media-band__body { padding: var(--space-3); }
}

/* ============ motion preferences ============ */
@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;
    scroll-behavior: auto !important;
  }

  html.js-ready [data-reveal] { opacity: 1; transform: none; }
  .scroll-meter span { transition: none; }
}