:root {
  --color-surface: #242123;
  --color-surface-alt: #332f31;
  --color-surface-deep: #454043;
  --color-ink: #c8bcc4;
  --color-ink-soft: #9e8a97;
  --color-ink-muted: #8a7583;
  --color-line: #423d40;
  --color-primary: #e02ea3;
  --color-primary-ink: #181116;
  --color-primary-soft: #3e2335;
  --color-accent: #34e916;
  --color-accent-ink: #181116;
  --color-highlight: #274521;
  --color-focus: #2bf609;
  --color-contrast-surface: #f2f1f2;
  --color-contrast-ink: #363034;
  --color-contrast-line: #c9c7c8;
  --color-contrast-accent: #1c7e0c;
  --overlay-scrim: linear-gradient(180deg, rgba(242, 241, 242, 0.35) 0%, rgba(242, 241, 242, 0.72) 55%, rgba(242, 241, 242, 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: 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(38px, 7.9vw, 101px);
  --text-figure: clamp(32px, 5.7vw, 73px);
  --weight-heading: 785;
  --weight-body: 400;
  --leading-body: 1.8;
  --leading-heading: 1.19;
  --tracking-heading: 0.004em;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 15px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 0 0 1px rgba(52, 233, 22, 0.35);
  --shadow-2: 0 0 28px rgba(52, 233, 22, 0.35);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1280px;
  --measure: 72ch;
  --gutter: 24px;
  --section-y: 89px;
  --section-y-lg: 125px;
}

/* ===================== reset ===================== */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; border-radius: var(--radius-sm); }
::selection { background: var(--color-primary); color: var(--color-primary-ink); }

/* ===================== base ===================== */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background-color: var(--color-surface);
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--color-line) 45%, transparent) var(--border-thin), transparent var(--border-thin)),
    linear-gradient(to bottom, color-mix(in srgb, var(--color-line) 45%, transparent) var(--border-thin), transparent var(--border-thin));
  background-size: var(--space-8) var(--space-8);
  background-position: center top;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { max-width: var(--measure); }
strong { color: var(--color-ink); font-weight: 600; }
small { font-size: var(--text-sm); color: var(--color-ink-soft); }
#main-content { display: block; scroll-margin-top: 148px; }
#main-content:focus { outline: none; }
:target { scroll-margin-top: 148px; }

/* ===================== layout ===================== */
.shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); }
.section--tight { padding-block: var(--space-8); }
.section--flush { padding-block: 0; }
.band { background: var(--color-surface-alt); }
.band--deep { background: var(--color-surface-deep); }
.band--contrast { background: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.band--contrast h1, .band--contrast h2, .band--contrast h3, .band--contrast h4 { color: var(--color-contrast-ink); }
.band--contrast p, .band--contrast li, .band--contrast td, .band--contrast th { color: var(--color-contrast-ink); }
.band--contrast small, .band--contrast .mono { color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent); }
.band--contrast a { color: var(--color-contrast-accent); }
.band--contrast .rule, .band--contrast hr { border-color: var(--color-contrast-line); }
.band--contrast .rules-table th, .band--contrast .rules-table td { border-bottom-color: var(--color-contrast-line); }
.band--contrast .rules-table tbody tr:nth-child(even) { background: color-mix(in srgb, var(--color-contrast-line) 30%, transparent); }
.band--contrast .tag { border-color: var(--color-contrast-line); color: var(--color-contrast-ink); }

.grid { display: grid; gap: var(--gutter); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.split { display: grid; gap: var(--space-6); align-items: start; }
.split--2-1 { grid-template-columns: 2fr 1fr; }
.split--3-2 { grid-template-columns: 3fr 2fr; }
.split--1-1 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.flow > * + * { margin-top: var(--space-3); }
.flow-lg > * + * { margin-top: var(--space-6); }

/* ===================== header ===================== */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -120px;
  z-index: 120;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-weight: 600;
  transition: top 180ms ease;
}
.skip-link:focus { top: var(--space-2); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.header-top { border-bottom: var(--border-thin) solid var(--color-line); }
.header-top__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 56px;
  padding-block: var(--space-1);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  line-height: 1.15;
  color: var(--color-ink);
}
.brand__mark {
  flex: none;
  width: 16px;
  height: 16px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 65%, transparent);
  border-radius: 3px;
  background-image: repeating-conic-gradient(from 0deg, var(--color-primary) 0% 25%, transparent 0% 50%);
  background-size: 8px 8px;
  box-shadow: 0 0 14px color-mix(in srgb, var(--color-primary) 35%, transparent);
}
.brand__suffix {
  color: var(--color-ink-muted);
  border-left: var(--border-thin) solid var(--color-line);
  padding-left: var(--space-2);
}
.header-status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-ink-soft);
  max-width: none;
}
.header-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: var(--shadow-2);
  animation: status-pulse 2.8s ease-in-out infinite;
}
@keyframes status-pulse { 50% { opacity: 0.42; } }
.header-utility {
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 55%, transparent);
  padding-bottom: 2px;
  transition: color 160ms ease, border-color 160ms ease;
}
.header-utility:hover { color: var(--color-primary); border-color: var(--color-primary); }

.site-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 64px;
}
.nav-list { display: flex; align-items: center; flex: 1 1 auto; min-width: 0; }
.nav-item { display: flex; align-items: center; min-width: 0; }
.nav-item + .nav-item::before {
  content: attr(data-coord);
  font-family: var(--font-mono);
  font-size: calc(var(--text-xs) + 2px);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  opacity: 0.7;
  padding-inline: var(--space-2);
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-ink-soft);
  white-space: nowrap;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}
.nav-link:hover {
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-accent) 45%, transparent);
  background: color-mix(in srgb, var(--color-highlight) 45%, transparent);
}
.nav-link[aria-current="page"] {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-primary) 40%, transparent), 0 0 22px color-mix(in srgb, var(--color-primary) 28%, transparent);
}
.site-nav__cta { flex: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-surface-alt) 70%, transparent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink);
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}
.site-nav[data-open] .nav-toggle {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-primary) 45%, transparent), 0 0 20px color-mix(in srgb, var(--color-primary) 26%, transparent);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(-1 * var(--border-thin));
  height: 2px;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

/* ===================== buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 20px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-surface-alt) 72%, transparent);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  line-height: 1.3;
  transition: color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}
.btn:hover { border-color: color-mix(in srgb, var(--color-accent) 55%, transparent); box-shadow: var(--shadow-1); }
.btn--sm { padding: 8px 15px; font-size: var(--text-sm); }
.btn--primary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 13%, var(--color-surface));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-primary) 38%, transparent);
}
.btn--primary:hover {
  color: var(--color-ink);
  background: color-mix(in srgb, var(--color-primary) 24%, var(--color-surface));
  box-shadow: 0 0 0 1px var(--color-primary), 0 0 26px color-mix(in srgb, var(--color-primary) 30%, transparent);
}
.btn--accent {
  border-color: color-mix(in srgb, var(--color-accent) 70%, transparent);
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-highlight) 60%, var(--color-surface));
  box-shadow: var(--shadow-1);
}
.btn--accent:hover { color: var(--color-accent-ink); background: var(--color-accent); }
.btn--ghost { border-color: transparent; background: transparent; color: var(--color-ink-soft); }
.btn--ghost:hover { color: var(--color-ink); border-color: var(--color-line); box-shadow: none; }
.band--contrast .btn { border-color: var(--color-contrast-line); background: transparent; color: var(--color-contrast-ink); }
.band--contrast .btn:hover { border-color: var(--color-contrast-accent); color: var(--color-contrast-accent); box-shadow: none; }

/* ===================== small parts ===================== */
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--color-primary); }
.rule { border: 0; border-top: var(--border-thin) solid var(--color-line); margin-block: var(--space-4); }
.coord {
  font-family: var(--font-mono);
  font-size: calc(var(--text-xs) + 2px);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}
.emph {
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-3);
  margin-block: var(--space-3);
}
.emph--accent { border-left-color: var(--color-accent); }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}
.tag--accent { border-color: color-mix(in srgb, var(--color-accent) 50%, transparent); color: var(--color-accent); }
.tag--primary { border-color: color-mix(in srgb, var(--color-primary) 50%, transparent); color: var(--color-primary); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.breadcrumb li { display: flex; align-items: center; }
.breadcrumb li + li::before { content: "/"; margin-inline: var(--space-1); color: var(--color-line); }
.breadcrumb a:hover { color: var(--color-accent); }

.plate {
  position: relative;
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-alt) 78%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.plate--glow {
  border-color: color-mix(in srgb, var(--color-primary) 52%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-primary) 32%, transparent), 0 0 26px color-mix(in srgb, var(--color-primary) 20%, transparent);
}
.plate__index {
  display: inline-block;
  padding: 2px 9px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.tabs { display: block; }
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.tab {
  padding: 8px 14px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.tab:hover { color: var(--color-ink); border-color: var(--color-line); }
.tab[aria-selected="true"] {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-highlight);
  box-shadow: var(--shadow-1);
}
.tabs__panels { margin-top: var(--space-4); }
.tabs__panel { animation: panel-in 200ms ease both; }
.tabs__panel[hidden] { display: none; }
@keyframes panel-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.chips { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.chip {
  padding: 6px 13px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.chip:hover { color: var(--color-ink); border-color: color-mix(in srgb, var(--color-accent) 40%, transparent); }
.chip[aria-pressed="true"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-highlight);
  box-shadow: var(--shadow-1);
}
.is-filtered-out { display: none !important; }

.table-scroll { width: 100%; overflow-x: auto; }
.rules-table { width: 100%; min-width: 560px; font-size: var(--text-base); }
.rules-table caption {
  text-align: left;
  padding-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.rules-table th, .rules-table td {
  padding: 14px var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  text-align: left;
  vertical-align: top;
}
.rules-table thead th {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  border-bottom-color: color-mix(in srgb, var(--color-primary) 42%, var(--color-line));
}
.rules-table tbody tr:nth-child(even) { background: color-mix(in srgb, var(--color-surface-alt) 62%, transparent); }
.rules-table td.num { font-family: var(--font-mono); color: var(--color-ink); }

.stat { display: flex; flex-direction: column; gap: var(--space-1); }
.stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}
.stat__num--primary {
  color: var(--color-primary);
  text-shadow: 0 0 26px color-mix(in srgb, var(--color-primary) 45%, transparent);
}
.stat__num--accent {
  color: var(--color-accent);
  text-shadow: var(--shadow-2);
}
.stat__label { font-size: var(--text-sm); color: var(--color-ink-soft); }

.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-deep);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--glow { border-color: color-mix(in srgb, var(--color-primary) 45%, transparent); }
.media-frame__scrim {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}
.media-frame__caption {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-contrast-ink);
}

.doc-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
}
.anchor-nav {
  position: sticky;
  top: 148px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: var(--text-sm);
}
.anchor-nav a {
  padding: 4px 0 4px var(--space-2);
  border-left: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-muted);
  transition: color 160ms ease, border-color 160ms ease;
}
.anchor-nav a:hover { color: var(--color-ink); }
.anchor-nav a.is-active { color: var(--color-ink); border-left-color: var(--color-accent); }
.doc-body { max-width: var(--measure); }
.doc-body > * + * { margin-top: var(--space-3); }

[data-copy] { cursor: pointer; }
.is-copied { border-color: var(--color-accent) !important; color: var(--color-accent) !important; }

/* ===================== footer ===================== */
.site-footer {
  position: relative;
  margin-top: var(--section-y-lg);
  padding-block: var(--space-8) var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
  background: linear-gradient(180deg, var(--color-surface) 0%, color-mix(in srgb, var(--color-surface-alt) 78%, var(--color-surface)) 100%);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--border-thin));
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary) 45%, var(--color-accent) 70%, transparent);
  opacity: 0.85;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  gap: var(--space-8);
  align-items: start;
}
.footer-lede { display: flex; flex-direction: column; gap: var(--space-3); align-items: flex-start; }
.footer-closing {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: var(--leading-heading);
  color: var(--color-ink);
  max-width: 16ch;
}
.footer-stamp {
  padding: 4px 12px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
  border-radius: var(--radius-sm);
  color: color-mix(in srgb, var(--color-accent) 78%, var(--color-ink));
  letter-spacing: 0.32em;
  text-indent: 0.32em;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}
.footer-col__title {
  padding-bottom: var(--space-1);
  margin-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-muted);
  letter-spacing: 0.16em;
}
.footer-col__list { display: flex; flex-direction: column; gap: 6px; }
.footer-col__list a {
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  transition: color 160ms ease;
}
.footer-col__list a:hover { color: var(--color-accent); }
.footer-word {
  margin-block: var(--space-8) var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(40px, 11vw, calc(var(--text-4xl) * 1.45));
  line-height: 0.92;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  color: color-mix(in srgb, var(--color-primary) 26%, var(--color-surface));
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.footer-legal a { color: var(--color-ink-soft); }
.footer-legal a:hover { color: var(--color-accent); }
.footer-contact, .footer-address, .footer-icp, .footer-copy {
  color: var(--color-ink-muted);
  max-width: none;
}
.footer-copy { margin-left: auto; }
.footer-copy span { color: var(--color-ink); }

/* ===================== motion ===================== */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 240ms ease, transform 240ms ease;
}
.has-js [data-reveal].is-visible { opacity: 1; transform: none; }
.is-anchor-flash {
  outline: 2px solid var(--color-primary);
  outline-offset: 10px;
  border-radius: var(--radius-sm);
}

/* ===================== responsive ===================== */
@media (min-width: 1024px) {
  .section { padding-block: var(--section-y-lg); }
}
@media (max-width: 1100px) {
  .header-status { display: none; }
  .footer-top { grid-template-columns: minmax(0, 1fr); gap: var(--space-6); }
}
@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .site-nav__inner { flex-wrap: wrap; gap: var(--space-2); min-height: 0; padding-block: var(--space-2); }
  .site-nav__cta { order: 1; margin-right: auto; }
  .nav-toggle { order: 2; }
  .nav-list {
    order: 3;
    flex-basis: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
  }
  .site-nav[data-open] .nav-list { display: flex; }
  .nav-item { width: 100%; }
  .nav-item + .nav-item::before { display: none; }
  .nav-link { width: 100%; padding: 12px var(--space-2); border-radius: var(--radius-sm); }
  .split, .split--2-1, .split--3-2, .split--1-1 { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 12; }
  .doc-layout { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .anchor-nav { position: static; flex-direction: row; flex-wrap: wrap; }
  .anchor-nav a { border-left: 0; border-bottom: var(--border-thin) solid var(--color-line); padding: 4px 2px; }
  .anchor-nav a.is-active { border-bottom-color: var(--color-accent); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
  .footer-copy { margin-left: 0; }
  .footer-word { margin-block: var(--space-6) var(--space-3); }
}
@media (max-width: 640px) {
  :root { --gutter: 18px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .brand { font-size: var(--text-base); }
  .footer-closing { font-size: var(--text-lg); }
}
@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;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .tabs__panel { animation: none; }
  .header-status__dot { animation: none; }
}