:root {
  --color-surface: #211d20;
  --color-surface-alt: #302b2e;
  --color-surface-deep: #423b40;
  --color-ink: #c5b5c0;
  --color-ink-soft: #9b8394;
  --color-ink-muted: #8c7385;
  --color-line: #3f383d;
  --color-primary: #c7389e;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #382132;
  --color-accent: #5cd926;
  --color-accent-ink: #181116;
  --color-highlight: #2c3f21;
  --color-focus: #57e619;
  --color-contrast-surface: #f4f2f3;
  --color-contrast-ink: #383337;
  --color-contrast-line: #cbc8ca;
  --color-contrast-accent: #357e16;
  --overlay-scrim: linear-gradient(180deg, rgba(244, 242, 243, 0.35) 0%, rgba(244, 242, 243, 0.72) 55%, rgba(244, 242, 243, 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: 11.4px;
  --text-sm: 14.3px;
  --text-base: 16px;
  --text-lg: 20.0px;
  --text-xl: 25.0px;
  --text-2xl: 31.2px;
  --text-3xl: 39.1px;
  --text-4xl: 48.8px;
  --text-display: clamp(40px, 8.3vw, 106px);
  --text-figure: clamp(33px, 5.9vw, 76px);
  --weight-heading: 614;
  --weight-body: 400;
  --leading-body: 1.84;
  --leading-heading: 1.26;
  --tracking-heading: 0.006em;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 11px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: 0 0 0 1px rgba(92, 217, 38, 0.35);
  --shadow-2: 0 0 28px rgba(92, 217, 38, 0.35);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1160px;
  --measure: 72ch;
  --gutter: 32px;
  --section-y: 85px;
  --section-y-lg: 119px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 96px;
}
body {
  --header-h: 72px;
  margin: 0;
  padding-top: var(--header-h);
  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;
  -webkit-font-smoothing: antialiased;
}
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);
}
h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 var(--space-2); padding-left: 1.25em; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
strong, b { font-weight: 700; color: var(--color-ink); }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.94em; }
hr { border: 0; border-top: var(--border-thin) solid var(--color-line); margin: var(--space-4) 0; }
a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--color-ink); }
::selection { background-color: var(--color-primary); color: var(--color-primary-ink); }
[hidden] { display: none !important; }
:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4);
}
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-12 { grid-column: span 12; }

.section { padding-block: var(--section-y); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }
.section--lg { padding-block: var(--section-y-lg); }
.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 a { color: var(--color-contrast-accent); }
.section--contrast .eyebrow,
.section--contrast .tag {
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}
.section--contrast .card {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 86%, var(--color-contrast-ink));
  border-color: var(--color-contrast-line);
}
.section--contrast .card:hover,
.section--contrast .card:focus-within {
  border-color: var(--color-contrast-accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-contrast-accent) 55%, transparent);
}
.section--contrast .figure-num { color: var(--color-contrast-ink); }
.section--contrast .figure-num--accent { color: var(--color-contrast-accent); }
.section--contrast .figure-caption { color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent); }
.section--contrast .media-frame { border-color: var(--color-contrast-line); }
.section--contrast .table-wrap { border-color: var(--color-contrast-line); }

.section-head {
  display: grid;
  gap: var(--space-1);
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}
.prose h2 { margin-top: var(--space-6); font-size: var(--text-2xl); }
.prose h3 { margin-top: var(--space-4); }
.prose p { margin-bottom: var(--space-2); }
.lead {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink);
  max-width: var(--measure);
}

/* ---------- label system ---------- */
.eyebrow,
.tag {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.eyebrow {
  display: inline-block;
  margin-bottom: var(--space-1);
  color: var(--color-ink-muted);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  letter-spacing: 0.06em;
}
.tag--accent {
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 48%, transparent);
}
.chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: color-mix(in srgb, var(--color-primary) 86%, transparent);
}

/* ---------- figures ---------- */
.figure-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}
.figure-num--accent { color: var(--color-accent); }
.figure-caption {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 14px 26px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease, box-shadow 200ms ease;
}
.btn:hover { color: var(--color-ink); border-color: var(--color-primary); }
.btn--primary {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-1);
}
.btn--primary:hover {
  color: var(--color-primary-ink);
  background-color: color-mix(in srgb, var(--color-primary) 88%, var(--color-primary-ink));
  box-shadow: var(--shadow-2);
}
.btn--ghost { color: var(--color-ink-soft); }
.btn--ghost:hover { color: var(--color-ink); box-shadow: var(--shadow-1); }

/* ---------- cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3);
}
.card {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding: var(--space-3);
  background-color: color-mix(in srgb, var(--color-surface-deep) 72%, transparent);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.card:hover,
.card:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}
.card h3 { margin: 0; font-size: var(--text-xl); }
.card p { margin: 0; color: var(--color-ink-soft); }

/* ---------- media ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
}
.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(155deg,
    color-mix(in srgb, var(--color-primary) 60%, transparent) 0%,
    color-mix(in srgb, var(--color-primary) 0%, transparent) 58%);
  mix-blend-mode: screen;
}
.media-frame--ratio-16-10 { aspect-ratio: 16 / 10; }
.media-frame--ratio-4-3 { aspect-ratio: 4 / 3; }
.media-frame--ratio-1-1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame__caption {
  position: absolute;
  z-index: 2;
  inset-inline: 0;
  bottom: 0;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

/* ---------- table ---------- */
.table-wrap {
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}
.data-table caption {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.data-table th,
.data-table td {
  padding: 14px var(--space-3);
  text-align: left;
  border-bottom: var(--border-thin) solid var(--color-line);
  vertical-align: top;
}
.data-table thead th {
  background-color: var(--color-surface-deep);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  white-space: nowrap;
}
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover { background-color: color-mix(in srgb, var(--color-surface-deep) 46%, transparent); }

/* ---------- breadcrumb ---------- */
.breadcrumb { margin-bottom: var(--space-3); }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumb li + li::before { content: "/"; color: var(--color-line); }
.breadcrumb a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); }

/* ---------- anchor nav ---------- */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.anchor-nav a {
  padding: 6px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}
.anchor-nav a:hover { color: var(--color-ink); border-color: var(--color-ink-muted); }
.anchor-nav a[aria-current="true"] {
  color: var(--color-ink);
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

/* ---------- filter ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}
.filter-btn {
  padding: 8px 16px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}
.filter-btn:hover { color: var(--color-ink); border-color: var(--color-ink-muted); }
.filter-btn[aria-pressed="true"] {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-ink);
  box-shadow: var(--shadow-1);
}

/* ---------- reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 320ms ease, transform 320ms ease;
}
.js [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); color: var(--color-primary-ink); }

/* ---------- header ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 100%;
  height: 2px;
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  pointer-events: none;
}
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 80;
  background-color: transparent;
  border-bottom: var(--border-thin) solid transparent;
  transition: background-color 200ms ease, border-color 200ms ease;
}
.site-header[data-scrolled] {
  background-color: color-mix(in srgb, var(--color-surface) 94%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
  text-decoration: none;
}
.brand:hover { color: var(--color-ink); }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-1);
}
.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: color-mix(in srgb, var(--color-surface-deep) 70%, transparent);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  cursor: pointer;
}
.nav-toggle-bars {
  position: relative;
  width: 16px;
  height: 10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 200ms ease;
}
.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-4px) rotate(-45deg); }
.nav-toggle-text { letter-spacing: 0.08em; }
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-link {
  display: inline-block;
  padding: 6px 2px;
  border-bottom: var(--border-thick) solid transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease;
}
.nav-link:hover { color: var(--color-ink); }
.nav-link[aria-current="page"] {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-pill);
  background-color: color-mix(in srgb, var(--color-primary) 76%, transparent);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: background-color 200ms ease, box-shadow 200ms ease;
}
.nav-cta:hover {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-2);
}

/* ---------- footer ---------- */
.site-footer {
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  padding-block: var(--section-y) var(--space-4);
}
.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.footer-brand-text {
  margin: 0;
  max-width: 52ch;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.7;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr 1.25fr;
  gap: var(--space-6) var(--space-4);
  padding-block: var(--space-6);
}
.footer-col {
  display: grid;
  align-content: start;
  gap: var(--space-2);
}
.footer-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.footer-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--color-ink);
  font-size: var(--text-base);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
.footer-list a:hover {
  color: var(--color-accent);
  border-bottom-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
}
.footer-index-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.footer-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
  color: var(--color-ink-soft);
}
.footer-contact-item { display: inline-flex; align-items: baseline; gap: 8px; }
.footer-contact-value { color: var(--color-ink); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-copy { margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 1023px) {
  .footer-grid { grid-template-columns: 1.15fr 1fr; }
}
@media (max-width: 899px) {
  .grid { gap: var(--space-3); }
  .col-span-3,
  .col-span-4,
  .col-span-5,
  .col-span-6,
  .col-span-7,
  .col-span-8 { grid-column: span 12; }

  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    padding: var(--space-3) var(--gutter) var(--space-4);
    background-color: color-mix(in srgb, var(--color-surface) 98%, transparent);
    border-bottom: var(--border-thin) solid var(--color-line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }
  .site-nav[data-open] { display: flex; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list li + li { border-top: var(--border-thin) solid var(--color-line); }
  .nav-link {
    display: block;
    padding: 14px 2px;
    border-bottom: 0;
    border-left: var(--border-thick) solid transparent;
    padding-left: 12px;
    font-size: var(--text-base);
    letter-spacing: 0.04em;
  }
  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--color-primary);
    color: var(--color-ink);
  }
  .nav-cta { justify-content: center; padding: 14px 20px; }

  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--section-y); }
  .section-head { margin-bottom: var(--space-4); }
  .site-footer { padding-top: var(--section-y); }
}
@media (max-width: 599px) {
  body { --header-h: 64px; }
  .container { padding-inline: 20px; }
  .site-nav { padding-inline: 20px; }
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--space-2); }
  .col-span-3,
  .col-span-4,
  .col-span-5,
  .col-span-6,
  .col-span-7,
  .col-span-8,
  .col-span-12 { grid-column: span 6; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .footer-contact { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .card-grid { grid-template-columns: 1fr; }
  .brand-mark { width: 34px; height: 34px; }
}

/* ---------- accessibility ---------- */
@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;
  }
  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-progress { transition: none; }
}