:root {
  --bg: #061A2B;
  --panel: #0C2A42;
  --panel-deep: #071D2E;
  --line: #1B405A;
  --line-soft: rgba(27, 64, 90, 0.6);
  --cyan: #28E0D2;
  --coral: #FF6B4A;
  --gold: #F4C95D;
  --paper: #F7FBFD;
  --steel: #93AABB;
  --ink: #02080F;
  --mint: #7BE0A3;
  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --maxw: 1280px;
  --gutter: clamp(18px, 4vw, 40px);
  --radius: 2px;
  --shadow: 0 22px 48px -30px rgba(0, 0, 0, 0.95);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--line) var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 620px at 95% -10%, rgba(40, 224, 210, 0.12), transparent 68%),
    radial-gradient(800px 540px at -8% 62%, rgba(255, 107, 74, 0.08), transparent 70%),
    linear-gradient(rgba(27, 64, 90, 0.24) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 64, 90, 0.24) 1px, transparent 1px);
  background-size: auto, auto, 96px 96px, 96px 96px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
}

main {
  display: block;
}

#main-content {
  scroll-margin-top: 120px;
}

img {
  max-width: 100%;
  height: auto;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--mint);
}

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.005em;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.25rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.1rem;
}

p {
  margin: 0 0 1.1em;
}

ul,
ol {
  margin-top: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 180ms var(--ease);
}

.skip-link:focus {
  color: var(--ink);
  transform: translateY(0);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-shell {
  padding-block: clamp(28px, 5vw, 64px) clamp(52px, 8vw, 100px);
}

.prose {
  max-width: 70ch;
  color: rgba(247, 251, 253, 0.9);
}

.prose h2,
.prose h3 {
  margin-top: 1.5em;
}

.prose ul,
.prose ol {
  padding-left: 1.25em;
}

.prose li {
  margin-bottom: 0.5em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--coral);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  margin: 0;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.panel {
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(12, 42, 66, 0.94), rgba(7, 29, 46, 0.94));
  box-shadow: var(--shadow);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  text-align: center;
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease);
}

.btn:hover {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(40, 224, 210, 0.08);
}

.btn-coral {
  border-color: var(--coral);
  background: rgba(255, 107, 74, 0.06);
  color: var(--coral);
}

.btn-coral:hover {
  border-color: var(--coral);
  background: var(--coral);
  color: var(--ink);
}

.btn-solid {
  border-color: var(--coral);
  background: var(--coral);
  color: var(--ink);
}

.btn-solid:hover {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.btn-quiet {
  border-color: transparent;
  color: var(--steel);
}

.btn-quiet:hover {
  border-color: var(--line);
  background: rgba(40, 224, 210, 0.06);
  color: var(--paper);
}

.breadcrumbs {
  margin-bottom: 24px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

.breadcrumb-link {
  color: var(--steel);
  text-decoration: none;
}

.breadcrumb-link:hover {
  color: var(--cyan);
}

.breadcrumb-current {
  color: var(--gold);
}

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(12, 42, 66, 0.92), rgba(6, 26, 43, 0.96));
  box-shadow: var(--shadow);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.card:hover {
  border-color: rgba(40, 224, 210, 0.65);
  transform: translateY(-6px);
}

.card-index {
  display: block;
  margin-bottom: 12px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.card-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.55rem);
  font-weight: 800;
  line-height: 1.15;
}

.card-text {
  margin: 0;
  color: var(--steel);
  font-size: 14.5px;
  line-height: 1.7;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(27, 64, 90, 0.24);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: 0.06em;
}

.tag--gold {
  border-color: rgba(244, 201, 93, 0.5);
  background: rgba(244, 201, 93, 0.08);
  color: var(--gold);
}

.tag--cyan {
  border-color: rgba(40, 224, 210, 0.45);
  background: rgba(40, 224, 210, 0.07);
  color: var(--cyan);
}

.tag--coral {
  border-color: rgba(255, 107, 74, 0.5);
  background: rgba(255, 107, 74, 0.08);
  color: var(--coral);
}

.media-frame {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(40, 224, 210, 0.14), transparent 42%),
    linear-gradient(315deg, rgba(255, 107, 74, 0.12), transparent 46%),
    var(--panel-deep);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(27, 64, 90, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 64, 90, 0.5) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.5;
  pointer-events: none;
}

.media-frame picture,
.media-frame img,
.media-frame video {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame[data-placeholder]::after {
  content: attr(data-placeholder);
  position: absolute;
  right: 12px;
  bottom: 12px;
  left: 12px;
  z-index: 2;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.08em;
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

.media-frame--tall {
  aspect-ratio: 4 / 5;
}

.media-caption {
  margin-top: 8px;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.chapter-rail {
  position: sticky;
  top: 112px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.chapter-link {
  display: block;
  margin-left: -13px;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.chapter-link:hover {
  color: var(--paper);
}

.chapter-link.is-current,
.chapter-link[aria-current] {
  border-left-color: var(--cyan);
  background: rgba(40, 224, 210, 0.06);
  color: var(--cyan);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 26, 43, 0.96);
  box-shadow: 0 12px 30px -24px #000;
  backdrop-filter: blur(10px);
}

.header-strip {
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(40, 224, 210, 0.08), transparent 45%, rgba(255, 107, 74, 0.06));
}

.strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 26px;
  font-size: 10.5px;
  letter-spacing: 0.12em;
}

.strip-coord {
  color: var(--steel);
  white-space: nowrap;
}

.strip-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--gold);
  white-space: nowrap;
}

.status-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(123, 224, 163, 0.14);
  animation: status-pulse 3s ease-in-out infinite;
}

@keyframes status-pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(0.9);
  }
  50% {
    opacity: 1;
    transform: scale(1.15);
  }
}

.header-bar {
  position: relative;
}

.header-bar-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 64px;
  padding-block: 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--paper);
  text-decoration: none;
}

.brand:hover {
  color: var(--paper);
}

.brand-mark {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--panel), var(--panel-deep));
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.02em;
  box-shadow: inset 0 0 0 1px rgba(40, 224, 210, 0.06);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 9px;
  height: 9px;
  background: var(--coral);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: 0.06em;
}

.brand-sub {
  margin-top: 3px;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.site-nav {
  min-width: 0;
  justify-self: center;
}

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(12, 42, 66, 0.45);
  list-style: none;
}

.nav-item {
  display: flex;
  flex: 0 0 auto;
}

.nav-item + .nav-item {
  border-left: 1px solid var(--line);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border: 0;
  color: var(--steel);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease);
}

.nav-link:hover {
  background: rgba(40, 224, 210, 0.08);
  color: var(--paper);
}

.nav-num {
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 9px;
  line-height: 1;
  letter-spacing: 0;
}

.nav-link:hover .nav-num {
  color: var(--cyan);
}

.nav-link[aria-current="page"] {
  background: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

.nav-link[aria-current="page"] .nav-num {
  color: rgba(2, 8, 15, 0.55);
}

.header-tools {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 10px;
}

.header-status {
  padding-left: 12px;
  border-left: 1px solid var(--line);
  color: var(--steel);
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.header-cta {
  height: 38px;
  min-height: 38px;
  padding: 0 16px;
  font-size: 13.5px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 38px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--paper);
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--cyan);
  background: rgba(40, 224, 210, 0.08);
}

.nav-toggle-text {
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--cyan);
  content: "";
  transition: transform 200ms var(--ease), background-color 200ms var(--ease);
}

.nav-toggle-lines {
  position: relative;
}

.nav-toggle-lines::before {
  position: absolute;
  top: -5px;
  left: 0;
}

.nav-toggle-lines::after {
  position: absolute;
  top: 5px;
  left: 0;
}

.site-header[data-open] .nav-toggle {
  border-color: var(--cyan);
  background: rgba(40, 224, 210, 0.1);
}

.site-header[data-open] .nav-toggle-lines {
  background: transparent;
}

.site-header[data-open] .nav-toggle-lines::before {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-lines::after {
  transform: translateY(-5px) rotate(-45deg);
}

.header-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(27, 64, 90, 0.4);
  pointer-events: none;
}

.header-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--mint) 55%, var(--coral));
  box-shadow: 0 0 12px rgba(40, 224, 210, 0.6);
  transition: width 80ms linear;
}

.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 110px);
  border-top: 1px solid var(--line);
  background-color: var(--ink);
  background-image:
    linear-gradient(90deg, rgba(27, 64, 90, 0.25) 1px, transparent 1px),
    linear-gradient(rgba(27, 64, 90, 0.2) 1px, transparent 1px);
  background-size: 80px 80px;
  color: var(--steel);
}

.site-footer::before {
  display: block;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold) 45%, var(--coral));
  content: "";
}

.footer-main {
  padding: clamp(38px, 6vw, 64px) 0 clamp(26px, 4vw, 38px);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.4fr) repeat(2, minmax(120px, 0.7fr)) minmax(220px, 1.1fr);
  align-items: start;
  gap: clamp(24px, 4vw, 52px);
}

.footer-brand {
  min-width: 0;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--paper);
}

.footer-logo-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.footer-name {
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.05em;
}

.footer-tagline {
  max-width: 32ch;
  margin: 0;
  color: var(--paper);
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.7;
}

.footer-update {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 6px 10px;
  border: 1px solid rgba(244, 201, 93, 0.45);
  background: rgba(244, 201, 93, 0.07);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.4;
  letter-spacing: 0.06em;
}

.footer-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(27, 64, 90, 0.7);
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.footer-link::before {
  color: var(--line);
  font-family: var(--font-mono);
  content: "/";
}

.footer-link:hover {
  color: var(--cyan);
}

.footer-link:hover::before {
  color: var(--cyan);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.contact-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
}

.contact-label {
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 9.5px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-value {
  color: var(--paper);
  line-height: 1.55;
  word-break: break-word;
}

.contact-value--mono {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
}

.footer-note {
  max-width: 32ch;
  margin: 12px 0 0;
  color: var(--steel);
  font-size: 11.5px;
  line-height: 1.65;
}

.footer-bottom {
  padding: 16px 0 18px;
  border-top: 1px solid rgba(27, 64, 90, 0.8);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 18px;
}

.footer-region {
  color: var(--cyan);
}

.footer-legal {
  color: var(--steel);
}

.footer-icp {
  color: var(--steel);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links .footer-link {
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 10.5px;
}

.footer-links .footer-link:hover {
  color: var(--cyan);
}

@media (max-width: 1100px) {
  .header-status {
    display: none;
  }
}

@media (max-width: 980px) {
  .header-bar-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    min-height: 60px;
  }

  .site-nav {
    display: none;
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    padding-top: 8px;
    border-top: 1px solid var(--line-soft);
  }

  .site-header[data-open] .site-nav {
    display: block;
  }

  .nav-list {
    overflow-x: auto;
    border-right: 0;
    border-left: 0;
    background: rgba(12, 42, 66, 0.6);
    scrollbar-color: var(--line) transparent;
    scrollbar-width: thin;
  }

  .nav-link {
    padding: 11px 15px;
    white-space: nowrap;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand,
  .footer-contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
    background-size: auto, auto, 72px 72px, 72px 72px;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand,
  .footer-contact {
    grid-column: auto;
  }

  .chapter-rail {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding: 0 0 8px;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .chapter-link {
    flex: 0 0 auto;
    margin-left: 0;
    border-bottom: 2px solid transparent;
    border-left: 0;
  }

  .chapter-link.is-current,
  .chapter-link[aria-current] {
    border-bottom-color: var(--cyan);
    border-left-color: transparent;
  }
}

@media (max-width: 620px) {
  .header-strip {
    display: none;
  }

  .header-bar-inner {
    min-height: 56px;
    padding-block: 9px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 19px;
  }

  .brand-name {
    font-size: 21px;
  }

  .brand-sub {
    display: none;
  }

  .header-cta {
    height: 36px;
    min-height: 36px;
    padding: 0 12px;
    font-size: 13px;
  }

  .nav-toggle {
    height: 36px;
    padding: 0 10px;
  }

  .footer-bottom-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 430px) {
  .nav-toggle-text {
    display: none;
  }

  .nav-num {
    display: none;
  }

  .nav-link {
    padding: 10px 12px;
    font-size: 13px;
  }

  .contact-row {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 8px;
  }

  .contact-value--mono {
    font-size: 11px;
  }
}

@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;
  }

  .status-pulse {
    animation: none;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .card:hover {
    transform: none;
  }
}