:root {
  --color-surface: #fbfbfb;
  --color-surface-alt: #f2f2f2;
  --color-surface-deep: #e6e6e5;
  --color-ink: #494a40;
  --color-ink-soft: #6f6f62;
  --color-ink-muted: #868778;
  --color-line: #dbdbd9;
  --color-primary: #737910;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e8e9da;
  --color-accent: #08809b;
  --color-accent-ink: #ffffff;
  --color-highlight: #cfe5ea;
  --color-focus: #007d99;
  --color-contrast-surface: #1c1d0e;
  --color-contrast-ink: #e7e7e4;
  --color-contrast-line: #49493d;
  --color-contrast-accent: #0cc8f3;
  --overlay-scrim: linear-gradient(180deg, rgba(28, 29, 14, 0.35) 0%, rgba(28, 29, 14, 0.72) 55%, rgba(28, 29, 14, 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: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(45px, 9.3vw, 119px);
  --text-figure: clamp(38px, 6.7vw, 86px);
  --weight-heading: 856;
  --weight-body: 400;
  --leading-body: 1.68;
  --leading-heading: 1.3;
  --tracking-heading: 0.006em;
  --radius-sm: 9px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 2px;
  --shadow-1: 0 1px 0 rgba(73, 74, 64, 0.12);
  --shadow-2: 0 2px 0 rgba(73, 74, 64, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1260px;
  --measure: 70ch;
  --gutter: 24px;
  --section-y: 95px;
  --section-y-lg: 133px;
}

/* ===== 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);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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);
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }
img, svg { display: block; max-width: 100%; }
a { color: var(--color-accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }
button { font: inherit; color: inherit; background: none; border: 0; }
dl, dd { margin: 0; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

#main-content { display: block; scroll-margin-top: var(--space-6); }

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

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--flush { padding-block: 0; }

.band--alt { background-color: var(--color-surface-alt); }
.band--deep { background-color: var(--color-surface-deep); }
.band--primary-soft { background-color: var(--color-primary-soft); }

.band--contrast {
  background-color: 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 dd,
.band--contrast dt { color: var(--color-contrast-ink); }
.band--contrast a { color: var(--color-contrast-accent); }
.band--contrast .rule,
.band--contrast .section-head { border-color: var(--color-contrast-line); }
.band--contrast .eyebrow {
  color: var(--color-contrast-accent);
  background-color: transparent;
  border-color: var(--color-contrast-line);
}
.band--contrast .btn {
  background-color: transparent;
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-ink);
}
.band--contrast .btn:hover,
.band--contrast .btn:focus-visible {
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
  border-color: var(--color-contrast-accent);
}
.band--contrast .mark--soft {
  background-color: color-mix(in srgb, var(--color-contrast-accent) 18%, transparent);
  color: var(--color-contrast-ink);
}

.band--slant {
  clip-path: polygon(0 0, 100% 2.6%, 100% 100%, 0 calc(100% - 2.6%));
}

.grid-11 {
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  gap: var(--gutter);
  align-items: start;
}
.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.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-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11,
.col-full { grid-column: 1 / -1; }

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  margin-bottom: var(--space-6);
}

.rule {
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  margin: 0;
}

.rule--ticks {
  position: relative;
  height: 16px;
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 2px, transparent 2px 24px);
  background-repeat: repeat-x;
  background-position: 0 bottom;
  background-size: 24px 7px;
}

/* ===== typography ===== */
.t-display {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: -0.014em;
}
.t-figure {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
}
.t-h1 { font-size: var(--text-4xl); }
.t-h2 { font-size: var(--text-2xl); }
.t-h3 { font-size: var(--text-xl); }
.t-h4 { font-size: var(--text-lg); }
.t-lede { font-size: var(--text-lg); line-height: 1.5; color: var(--color-ink-soft); }
.t-small { font-size: var(--text-sm); }
.t-xs { font-size: var(--text-xs); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.prose {
  max-width: var(--measure);
  color: var(--color-ink);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-2xl); margin-top: var(--space-6); }
.prose h3 { font-size: var(--text-xl); margin-top: var(--space-4); }
.prose ul,
.prose ol { padding-left: 1.4em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: var(--space-1); }
.prose a { color: var(--color-accent); }

/* ===== controls ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 12px 22px;
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  box-shadow: var(--shadow-2);
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.btn:hover,
.btn:focus-visible {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-surface);
}
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}
.btn--ghost {
  background-color: transparent;
  box-shadow: none;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 7px 16px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.chip:hover { border-color: var(--color-accent); color: var(--color-accent); }
.chip[aria-pressed="true"] {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px 4px;
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}
.mark--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.mark--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.mark--soft { background-color: var(--color-primary-soft); color: var(--color-ink); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.panel {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  overflow: hidden;
}
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: 10px var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}
.panel__head .mark--accent { letter-spacing: 0.06em; }
.panel__body { padding: var(--space-3); }

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.breadcrumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: color 160ms ease-out, border-color 160ms ease-out;
}
.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.breadcrumbs__sep { color: var(--color-ink-muted); }

/* ===== table ===== */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}
.data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.data-table caption {
  padding: var(--space-3) var(--space-3) 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.data-table th,
.data-table td {
  padding: 11px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table thead th {
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: 700;
  white-space: nowrap;
}
.data-table tbody tr:hover { background-color: var(--color-highlight); }
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table .mono { font-size: var(--text-sm); }

.band--contrast .table-wrap {
  background-color: transparent;
  border-color: var(--color-contrast-line);
}
.band--contrast .data-table caption { color: var(--color-contrast-ink); }
.band--contrast .data-table th,
.band--contrast .data-table td {
  border-bottom-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.band--contrast .data-table thead th {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 9%, transparent);
  color: var(--color-contrast-ink);
}
.band--contrast .data-table tbody tr:hover {
  background-color: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
}

/* ===== media frames ===== */
.media-frame {
  position: relative;
  display: block;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  overflow: hidden;
  box-shadow: var(--shadow-2);
}
.media-frame > img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.media-frame--tall > img { aspect-ratio: 3 / 4; }
.media-frame--square > img { aspect-ratio: 1 / 1; }
.media-frame--wide > img { aspect-ratio: 21 / 9; }
.media-frame--paper {
  padding: var(--space-2);
  background-color: var(--color-surface-alt);
  box-shadow: none;
}
.media-frame--paper > img {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}
.media-frame__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}
.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.media-frame__caption .mono { color: var(--color-contrast-accent); }

/* ===== decorative shapes ===== */
.shape {
  position: absolute;
  z-index: 0;
  pointer-events: none;
}
.shape--ring {
  width: 72px;
  height: 72px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: 50%;
}
.shape--wedge {
  width: 54px;
  height: 54px;
  background-color: var(--color-accent);
  border-radius: var(--radius-sm) 0 var(--radius-lg) 0;
}
.shape--quarter {
  width: 66px;
  height: 66px;
  background-color: var(--color-primary-soft);
  border-radius: 50% 0 0 0;
}
.shape--pill {
  width: 96px;
  height: 26px;
  border: var(--border-thin) solid var(--color-accent);
  border-radius: var(--radius-pill);
}
.shape--dot {
  width: 14px;
  height: 14px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

/* ===== track list ===== */
.track-list {
  position: relative;
  padding-left: 34px;
}
.track-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: var(--border-thin);
  background-color: var(--color-line);
}
.track-list > li {
  position: relative;
  padding-bottom: var(--space-4);
}
.track-list > li:last-child { padding-bottom: 0; }
.track-list > li::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 4px;
  width: 14px;
  height: 14px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: 50%;
  background-color: var(--color-surface);
}
.band--contrast .track-list::before { background-color: var(--color-contrast-line); }
.band--contrast .track-list > li::before {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-accent);
}

/* ===== header ===== */
.site-header {
  position: relative;
  z-index: 50;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: top 160ms ease-out;
}
.skip-link:focus { top: var(--space-2); }

.brand-row {
  background-color: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.brand-row__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 58px;
  padding-block: 6px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  text-decoration: none;
}
.brand-mark__glyph {
  position: relative;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border: var(--border-thin) solid var(--color-ink);
  border-radius: 8px 3px 8px 3px;
  background-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}
.brand-mark__glyph::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
}

.brand-row__scope {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-row__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}
.meta-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 22%, transparent);
}

.meta-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.meta-link:hover,
.meta-link:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-1);
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.nav-toggle:hover { background-color: var(--color-primary); color: var(--color-primary-ink); border-color: var(--color-primary); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}
.nav-toggle__bars > span {
  display: block;
  width: 15px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
}

.header-contact {
  display: none;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.header-contact__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  padding-block: var(--space-2);
}
.header-contact__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
  font-size: var(--text-sm);
}
.header-contact__key {
  padding: 2px 8px 3px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
  font-size: var(--text-xs);
}
.header-contact__val {
  color: var(--color-ink);
  word-break: break-all;
}
.header-contact__cta {
  margin-left: auto;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) solid var(--color-accent);
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}
.header-contact__cta:hover,
.header-contact__cta:focus-visible { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.nav-row { background-color: var(--color-surface); }
.nav-row__inner { padding-block: var(--space-2) 4px; }

.nav-track {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}
.nav-track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 18px;
  height: var(--border-thin);
  background-color: var(--color-line);
}
.nav-track__item {
  position: relative;
  z-index: 1;
}
.nav-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px 16px 8px;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 160ms ease-out;
}
.nav-node__dot {
  width: 14px;
  height: 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: 50%;
  background-color: var(--color-surface);
  transition: background-color 160ms ease-out, border-color 160ms ease-out,
    box-shadow 160ms ease-out;
}
.nav-node__label {
  padding: 3px 12px 4px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.nav-node:hover .nav-node__dot,
.nav-node:focus-visible .nav-node__dot {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-highlight);
}
.nav-node:hover .nav-node__label,
.nav-node:focus-visible .nav-node__label {
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.nav-node[aria-current="page"] .nav-node__dot {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
}
.nav-node[aria-current="page"] .nav-node__label {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}

/* ===== footer ===== */
.site-footer {
  padding-block: var(--space-6) var(--space-6);
  background-color: var(--color-surface);
}
.footer-frame {
  position: relative;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-alt);
  overflow: hidden;
}
.footer-scale {
  height: 14px;
  border-bottom: var(--border-thin) solid var(--color-line);
  background-color: var(--color-surface);
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 2px, transparent 2px 24px);
  background-repeat: repeat-x;
  background-position: 0 center;
  background-size: 24px 8px;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.2fr) minmax(0, 0.6fr);
  gap: var(--space-6);
  padding: var(--space-6);
}
.footer-brand__name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.footer-brand__glyph { box-shadow: none; }
.footer-brand__line {
  margin-top: var(--space-2);
  max-width: 46ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.footer-contact {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}
.footer-contact__row {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: var(--text-sm);
}
.footer-contact dt {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.footer-contact dd { color: var(--color-ink); }
.footer-contact dd.mono { word-break: break-all; }
.footer-links {
  display: grid;
  gap: 10px;
  align-content: start;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  transition: background-color 160ms ease-out, color 160ms ease-out,
    border-color 160ms ease-out;
}
.footer-link::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  transition: background-color 160ms ease-out;
}
.footer-link:hover,
.footer-link:focus-visible {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-surface);
}
.footer-link:hover::before,
.footer-link:focus-visible::before { background-color: var(--color-contrast-accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-4);
  padding: var(--space-3) var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
  background-color: var(--color-surface);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.footer-bottom__icp {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  color: var(--color-ink);
}
.footer-bottom__copy { color: var(--color-ink-soft); }
.footer-bottom__note { flex: 1 1 320px; min-width: 0; }

/* ===== responsive ===== */
@media (max-width: 1080px) {
  .footer-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-links {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
  }
}

@media (max-width: 900px) {
  .grid-11 > [class*="col-"] { grid-column: 1 / -1; }
  .brand-row__scope { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-contact[data-open="true"] { display: block; }
  .nav-row__inner {
    width: 100%;
    max-width: none;
    padding-inline: var(--gutter);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-track {
    width: max-content;
    flex-wrap: nowrap;
    padding-bottom: var(--space-1);
  }
  .section { padding-block: var(--space-8); }
  .section--lg { padding-block: var(--space-8); }
}

@media (max-width: 720px) {
  .brand-row__meta .meta-chip { display: none; }
  .header-contact__inner { flex-direction: column; align-items: flex-start; }
  .header-contact__cta { margin-left: 0; }
  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
  }
  .footer-bottom { padding: var(--space-3) var(--space-4); }
  .footer-contact__row { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .section-head { align-items: flex-start; }
}

@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;
  }
}