:root {
  --color-surface: #fafaf9;
  --color-surface-alt: #f2f1f0;
  --color-surface-deep: #e6e5e3;
  --color-ink: #504844;
  --color-ink-soft: #786d68;
  --color-ink-muted: #887c77;
  --color-line: #dbdad8;
  --color-primary: #a2674e;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #eee5e1;
  --color-accent: #be415d;
  --color-accent-ink: #ffffff;
  --color-highlight: #efd9dd;
  --color-focus: #cb3456;
  --color-contrast-surface: #251e1b;
  --color-contrast-ink: #e7e5e4;
  --color-contrast-line: #504a47;
  --color-contrast-accent: #cb677d;
  --overlay-scrim: linear-gradient(180deg, rgba(37, 30, 27, 0.35) 0%, rgba(37, 30, 27, 0.72) 55%, rgba(37, 30, 27, 0.92) 100%);
  --font-heading: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.9px;
  --text-sm: 16.1px;
  --text-base: 18px;
  --text-lg: 22.5px;
  --text-xl: 28.1px;
  --text-2xl: 35.2px;
  --text-3xl: 43.9px;
  --text-4xl: 54.9px;
  --text-display: clamp(34px, 5.8vw, 74px);
  --text-figure: clamp(28px, 4.1vw, 53px);
  --weight-heading: 607;
  --weight-body: 400;
  --leading-body: 1.83;
  --leading-heading: 1.19;
  --tracking-heading: 0.003em;
  --radius-sm: 18px;
  --radius-md: 23px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(80, 72, 68, 0.08);
  --shadow-2: 0 18px 44px rgba(80, 72, 68, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1100px;
  --measure: 72ch;
  --gutter: 24px;
  --section-y: 101px;
  --section-y-lg: 141px;
}

/* ============ reset 与基础排版 ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent); }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
h1, h2, h3, h4, h5 {
  margin: 0 0 var(--space-3);
  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-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-3); }
p:last-child { margin-bottom: 0; }
strong, b { font-weight: 600; }
hr { border: 0; border-top: var(--border-thin) solid var(--color-line); margin: var(--space-6) 0; }
::selection { background-color: var(--color-highlight); color: var(--color-ink); }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; border-radius: var(--radius-sm); }

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 200;
  transform: translateY(-200%);
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-2);
}
.skip-link:focus { transform: translateY(0); color: var(--color-accent-ink); }

/* ============ 容器 / 分区 / 错位边界 ============ */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--tight { max-width: calc(var(--container) * 0.72 + var(--gutter) * 2); }

.section { padding-block: var(--section-y); position: relative; }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }
.section--soft { background-color: var(--color-primary-soft); }
.section--deep { background-color: var(--color-surface-deep); }
.section--highlight { background-color: var(--color-highlight); }
.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); }
.section--contrast a { color: var(--color-contrast-accent); }
.section--contrast a:hover { color: var(--color-contrast-ink); }
.section--round { border-radius: var(--radius-lg); }

.shift-1 { margin-inline: 0 clamp(0px, 2.6vw, var(--space-3)); }
.shift-2 { margin-inline: clamp(0px, 5vw, var(--space-6)) 0; }

.grid { display: grid; gap: var(--space-3); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }

/* ============ 文本组件 ============ */
.display-title {
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  letter-spacing: -0.012em;
  margin-bottom: var(--space-4);
}
.page-title { font-size: var(--text-3xl); margin-bottom: var(--space-3); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: .14em;
  color: var(--color-ink-muted);
}
.eyebrow::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background-color: var(--color-primary);
}
.lead { font-size: var(--text-lg); line-height: 1.7; color: var(--color-ink-soft); max-width: 60ch; }

.prose { max-width: var(--measure); }
.prose h2 { margin-top: var(--space-6); font-size: var(--text-2xl); }
.prose h3 { margin-top: var(--space-4); }
.prose ul, .prose ol { margin-bottom: var(--space-3); }
.prose li { position: relative; padding-left: var(--space-3); margin-bottom: var(--space-2); }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: var(--color-primary);
}

.quote {
  position: relative;
  margin: var(--space-4) 0;
  padding-left: var(--space-4);
  font-size: var(--text-lg);
  line-height: 1.66;
  color: var(--color-ink);
}
.quote::before {
  content: "\201C";
  position: absolute;
  left: 0;
  top: -0.12em;
  font-family: var(--font-heading);
  font-size: 2.2em;
  line-height: 1;
  color: var(--color-primary);
}
.quote--indent { padding-left: var(--space-6); }
.quote cite { display: block; margin-top: var(--space-2); font-size: var(--text-sm); font-style: normal; color: var(--color-ink-muted); }

.figure {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1;
  color: var(--color-accent);
}
.figure__unit { margin-left: 6px; font-family: var(--font-body); font-size: var(--text-sm); font-weight: var(--weight-body); color: var(--color-ink-soft); }
.num { font-family: var(--font-mono); font-weight: 600; color: var(--color-accent); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 22px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: transform .2s ease, background-color .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background-color: var(--color-primary); color: var(--color-primary-ink); box-shadow: var(--shadow-1); }
.btn--primary:hover { background-color: color-mix(in srgb, var(--color-primary) 86%, #000); color: var(--color-primary-ink); }
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); box-shadow: var(--shadow-1); }
.btn--accent:hover { background-color: color-mix(in srgb, var(--color-accent) 86%, #000); color: var(--color-accent-ink); }
.btn--ghost { background-color: transparent; color: var(--color-ink); border-color: var(--color-line); }
.btn--ghost:hover { color: var(--color-primary); border-color: var(--color-primary); background-color: var(--color-primary-soft); }
.btn--sm { padding: 8px 16px; font-size: var(--text-xs); }

/* ============ 头部命令栏 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: box-shadow .24s ease, background-color .24s ease;
}
.site-header.is-scrolled { box-shadow: var(--shadow-1); }
.scroll-progress {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
  z-index: 3;
}
.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width .12s linear;
}
.site-header__inner {
  position: relative;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: padding .24s ease;
}
.brand { display: inline-flex; align-items: center; gap: var(--space-2); flex: 0 0 auto; color: var(--color-ink); }
.brand:hover { color: var(--color-ink); }
.brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background-color: var(--color-primary);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-1);
}
.brand__mark-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background-color: var(--color-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 22%, transparent);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: var(--weight-heading); color: var(--color-ink); }
.brand__sub { font-size: var(--text-xs); color: var(--color-ink-muted); letter-spacing: .04em; }

.header-current { display: none; align-items: center; gap: var(--space-1); white-space: nowrap; }
.header-current__label { font-size: var(--text-xs); letter-spacing: .1em; color: var(--color-ink-muted); }
.header-current__value {
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
}

.site-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-list__item { display: block; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color .2s ease, background-color .2s ease, transform .2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s ease;
}
.nav-link:hover { color: var(--color-ink); transform: translateY(-2px); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-weight: 600;
}
.nav-link[aria-current="page"]::after { transform: scaleX(0); }

.header-cta { flex: 0 0 auto; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  font-size: var(--text-xs);
}
.nav-toggle__bars { position: relative; display: block; width: 18px; height: 2px; border-radius: 2px; background-color: currentColor; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform .24s ease;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.site-header[data-open="true"] .nav-toggle__bars { background-color: transparent; }
.site-header[data-open="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.route-track {
  position: relative;
  width: 100%;
  max-width: var(--container);
  height: 14px;
  margin-inline: auto;
  transition: opacity .24s ease;
}
.route-track__line {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  width: 100%;
  height: 10px;
  transform: translateY(-50%) scaleX(0);
  transform-origin: left center;
  animation: routeGrow .6s ease-out .1s forwards;
}
.route-track__line path { fill: none; stroke: var(--color-line); stroke-width: 2; stroke-dasharray: 6 10; vector-effect: non-scaling-stroke; }
.route-track__node {
  position: absolute;
  top: 50%;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background-color: var(--color-line);
  transform: translate(-50%, -50%);
  animation: nodeFade .5s ease-out .3s both;
}
.route-track__node:nth-of-type(1) { left: 0; background-color: var(--color-primary); }
.route-track__node:nth-of-type(2) { left: 20%; }
.route-track__node:nth-of-type(3) { left: 40%; }
.route-track__node:nth-of-type(4) { left: 60%; }
.route-track__node:nth-of-type(5) { left: 80%; }
.route-track__node:nth-of-type(6) { left: 100%; background-color: var(--color-accent); }

@keyframes routeGrow { from { transform: translateY(-50%) scaleX(0); } to { transform: translateY(-50%) scaleX(1); } }
@keyframes nodeFade { from { opacity: 0; } to { opacity: 1; } }

/* ============ 页脚（反色） ============ */
.site-footer {
  margin-top: var(--section-y);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.site-footer a { color: var(--color-contrast-ink); }
.site-footer a:hover { color: var(--color-contrast-accent); }
.footer__inner { padding-block: var(--space-8) var(--space-4); }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr 1.2fr;
  gap: var(--space-6) var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.footer__col { min-width: 0; }
.footer__brand { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-3); }
.footer__brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background-color: var(--color-primary);
  box-shadow: inset 0 0 0 8px color-mix(in srgb, var(--color-contrast-surface) 70%, transparent);
  flex: 0 0 auto;
}
.footer__brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.footer__brand-name { font-family: var(--font-heading); font-size: var(--text-lg); font-weight: var(--weight-heading); }
.footer__brand-sub { font-size: var(--text-xs); color: color-mix(in srgb, var(--color-contrast-ink) 60%, var(--color-contrast-surface)); }
.footer__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--color-contrast-accent);
}
.footer__nav { display: flex; flex-direction: column; gap: 2px; }
.footer__nav-item { display: block; }
.footer__nav-link {
  display: inline-block;
  padding: 5px 0;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color .2s ease, transform .2s ease;
}
.footer__nav-link:hover { transform: translateX(2px); }
.footer__nav-link--current {
  position: relative;
  padding-left: var(--space-2);
  color: var(--color-contrast-accent);
  cursor: default;
}
.footer__nav-link--current::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--color-contrast-accent);
  transform: translateY(-50%);
}
.footer__contact { display: flex; flex-direction: column; gap: var(--space-2); }
.footer__contact-line { display: flex; flex-direction: column; gap: 2px; }
.footer__contact-key { font-size: var(--text-xs); letter-spacing: .1em; color: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface)); }
.footer__contact-value { font-size: var(--text-sm); font-family: var(--font-mono); word-break: break-word; }
.footer__note {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  padding-top: var(--space-4);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}
.footer__legal-item { margin: 0; }
.footer__legal-links { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-left: auto; }
.footer__legal-link { font-size: var(--text-xs); color: var(--color-contrast-accent); text-decoration: underline; text-underline-offset: 3px; }

/* ============ 卡片 / 标签 / 视觉容器 ============ */
.card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-1);
}
.card--plain { box-shadow: none; background-color: var(--color-surface-alt); }
.card--soft { box-shadow: none; background-color: var(--color-primary-soft); border-radius: var(--radius-lg); }
.card--deep { box-shadow: none; background-color: var(--color-surface-deep); border-radius: var(--radius-sm); }
.card--edge { position: relative; overflow: hidden; }
.card--edge::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background-image: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}
.tag-list { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-highlight);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  line-height: 1.6;
}
.tag--accent { background-color: color-mix(in srgb, var(--color-accent) 14%, var(--color-surface)); color: var(--color-accent); }
.tag--primary { background-color: var(--color-primary-soft); color: var(--color-primary); }

.media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}
.media--wide { border-radius: var(--radius-md); }
.media--tall { border-radius: var(--radius-sm); }
.media__img { width: 100%; height: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.media--tall .media__img { aspect-ratio: 3 / 4; }
.media__scrim { position: absolute; inset: 0; background-image: var(--overlay-scrim); opacity: 0; }
.media--overlay .media__scrim { opacity: 1; }
.media__plate,
.media__plate--corner {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--color-highlight);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  line-height: 1.6;
}
.media__plate--corner { left: auto; right: var(--space-2); top: var(--space-2); bottom: auto; }
.media__caption {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  left: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
}

.disclosure {
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}
.disclosure + .disclosure { margin-top: var(--space-2); }
.disclosure__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  cursor: pointer;
  list-style: none;
}
.disclosure__summary::-webkit-details-marker { display: none; }
.disclosure__summary::after {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-right: 4px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg);
  transition: transform .24s ease;
}
.disclosure[open] .disclosure__summary::after { transform: rotate(-135deg); }
.disclosure__body { padding: 0 var(--space-4) var(--space-4); color: var(--color-ink-soft); }

/* ============ 面包屑 ============ */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb__link { color: var(--color-ink-soft); }
.breadcrumb__link:hover { color: var(--color-accent); }
.breadcrumb__sep { color: var(--color-line); }

/* ============ 入场动效 ============ */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .grid--7-5, .grid--8-4 { grid-template-columns: 1fr; }
}
@media (max-width: 980px) {
  :root { --section-y: 72px; --section-y-lg: 96px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin-left: 0;
    padding: var(--space-2) var(--gutter) var(--space-3);
    background-color: var(--color-surface);
    border-bottom: var(--border-thin) solid var(--color-line);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-2);
    z-index: 4;
  }
  .site-header[data-open="true"] .site-nav { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link { display: block; width: 100%; padding: 12px 16px; font-size: var(--text-base); border-radius: var(--radius-sm); }
  .nav-link::after { display: none; }
  .nav-link:hover { transform: none; background-color: var(--color-surface-alt); }
  .nav-link[aria-current="page"] { border-radius: var(--radius-sm); }
  .site-header[data-open="true"] .route-track { opacity: 0; }
  .header-cta { margin-left: auto; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__col--contact { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  :root { --section-y: 56px; --section-y-lg: 72px; }
  h1, .page-title { font-size: var(--text-2xl); }
  .quote--indent { padding-left: var(--space-4); }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .route-track__node:nth-of-type(3),
  .route-track__node:nth-of-type(5) { display: none; }
}
@media (max-width: 560px) {
  .site-header__inner { gap: var(--space-2); }
  .brand__sub { display: none; }
  .header-cta { display: none; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__legal-links { margin-left: 0; }
}

@media (min-width: 981px) {
  .site-header.is-scrolled .site-header__inner { padding-block: var(--space-2); }
  .site-header.is-scrolled .brand__sub { display: none; }
  .site-header.is-scrolled .nav-list { display: none; }
  .site-header.is-scrolled .header-current { display: inline-flex; }
  .site-header.is-scrolled .site-nav { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .route-track__line { transform: translateY(-50%) scaleX(1); animation: none; }
  .route-track__node { opacity: 1; animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .nav-link:hover, .footer__nav-link:hover { transform: none; }
  .scroll-progress__bar { transition: none; }
}