:root {
  --ink: #0B1C2C;
  --hull: #10293D;
  --signal: #00E5C3;
  --amber: #FF8A3D;
  --paper: #F4EFE6;
  --cool: #C9D6DF;
  --mist: #7C8FA0;
  --cyan-mist: #E6FBF7;
  --teal: #0E6B60;
  --graphite: #2A3F52;
  --rail-w: 176px;
  --font-cn: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', sans-serif;
  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', 'SFMono-Regular', monospace;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow-rail: 24px 0 60px rgba(0,0,0,.45);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  color: var(--cool);
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 88% -8%, rgba(0,229,195,.10), transparent 65%),
    radial-gradient(700px 420px at 0% 32%, rgba(255,138,61,.06), transparent 60%),
    repeating-linear-gradient(90deg, rgba(42,63,82,.14) 0 1px, transparent 1px 96px);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { display: block; }

img, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--signal);
  text-underline-offset: 3px;
}

button {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.18;
  color: var(--paper);
}

h1 { font-size: clamp(32px, 5vw, 64px); }
h2 { font-size: clamp(24px, 3vw, 36px); }
h3 { font-size: clamp(18px, 2vw, 22px); }
h4 { font-size: 17px; }

p { margin: 0 0 1.2em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

strong { color: var(--paper); font-weight: 700; }

hr { border: 0; }

[hidden] { display: none !important; }

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

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s var(--ease);
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mist);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 48px);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 760px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

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

.grid-12 > * { min-width: 0; }

@media (min-width: 768px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-12 { grid-column: span 12; }
}

/* ---------- signal rail / header ---------- */
.site-header {
  position: relative;
  z-index: 80;
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: rgba(42,63,82,.55);
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--signal), var(--amber));
  transition: transform .12s linear;
}

.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px 14px 18px;
  background: linear-gradient(180deg, #0A1927 0%, #0B1C2C 48%, #091827 100%);
  border-right: 1px solid var(--graphite);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--graphite) transparent;
  z-index: 85;
}

.rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  width: 1px;
  height: 100%;
  background: repeating-linear-gradient(180deg, rgba(0,229,195,.5) 0 8px, transparent 8px 26px);
  opacity: .22;
  pointer-events: none;
}

.rail-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.brand-lockup {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand-lockup__mark {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  height: 20px;
}

.sig-bar {
  display: block;
  width: 4px;
  height: 40%;
  border-radius: 2px;
  background: var(--signal);
  transform-origin: 50% 100%;
  animation: bar-breathe 6s var(--ease) infinite;
}

.sig-bar:nth-child(2) { height: 70%; animation-delay: .5s; }
.sig-bar:nth-child(3) { height: 100%; animation-delay: 1s; }

@keyframes bar-breathe {
  0%, 100% { transform: scaleY(.68); opacity: .62; }
  50% { transform: scaleY(1); opacity: 1; }
}

.brand-lockup__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-lockup__en {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.2;
  letter-spacing: .18em;
  color: var(--signal);
}

.brand-lockup__cn {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .04em;
  color: var(--paper);
}

.brand-lockup--compact {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.brand-lockup--compact .brand-lockup__mark { height: 18px; }
.brand-lockup--compact .brand-lockup__en { font-size: 9px; }
.brand-lockup--compact .brand-lockup__cn { font-size: 14px; }

.rail-status {
  display: flex;
  gap: 8px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid rgba(42,63,82,.85);
  font-size: 11px;
  line-height: 1.6;
  color: var(--mist);
}

.status-dot {
  position: relative;
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--signal);
}

.status-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--signal);
  animation: signal-pulse 3s ease-out infinite;
}

@keyframes signal-pulse {
  0% { transform: scale(.6); opacity: .9; }
  70% { transform: scale(1.7); opacity: 0; }
  100% { transform: scale(1.7); opacity: 0; }
}

.rail-search {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-sm);
  background: rgba(16,41,61,.55);
  color: var(--cool);
  font-size: 12px;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.rail-search:hover,
.rail-search:focus-visible {
  border-color: rgba(0,229,195,.5);
  color: var(--signal);
  background: rgba(0,229,195,.08);
}

.rail-search__label { letter-spacing: .02em; }

.rail-search__key {
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1;
  color: var(--mist);
  border: 1px solid var(--graphite);
  border-radius: 4px;
  padding: 2px 5px;
}

.site-nav { min-height: 0; }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item { list-style: none; }

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--cool);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.nav-link:hover {
  background: rgba(0,229,195,.06);
  color: var(--paper);
}

.nav-idx {
  min-width: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--mist);
}

.nav-label { flex: 1; }

.nav-link[aria-current="page"] {
  color: var(--signal);
  background: rgba(0,229,195,.10);
  box-shadow: inset 0 0 0 1px rgba(0,229,195,.26);
}

.nav-link[aria-current="page"] .nav-idx { color: var(--signal); }

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(0,229,195,.14);
}

.rail-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
}

.rail-foot {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(124,143,160,.7);
}

.mobile-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 16px;
  background: rgba(10,25,39,.94);
  border-bottom: 1px solid var(--graphite);
  backdrop-filter: blur(12px);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--graphite);
  border-radius: 12px;
  background: rgba(16,41,61,.7);
  color: var(--paper);
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background .18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .22s var(--ease), top .22s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.site-header[data-open="true"] .nav-toggle__bars { background: transparent; }
.site-header[data-open="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-header[data-open="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.nav-scrim { display: none; }

.drawer-close { display: none; }

@media (max-width: 1023.98px) {
  .site-header {
    position: sticky;
    top: 0;
    z-index: 88;
  }

  .mobile-bar { display: flex; }

  .rail {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(86vw, 330px);
    padding: 58px 20px 28px;
    transform: translateX(-104%);
    visibility: hidden;
    transition: transform .32s var(--ease), visibility .32s var(--ease);
    box-shadow: var(--shadow-rail);
    border-right: 1px solid rgba(0,229,195,.22);
    z-index: 90;
  }

  .site-header[data-open="true"] .rail {
    transform: translateX(0);
    visibility: visible;
  }

  .rail .brand-lockup {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }

  .drawer-close {
    position: absolute;
    top: 14px;
    right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--graphite);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--cool);
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 89;
    background: rgba(3,10,18,.68);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), visibility .3s var(--ease);
  }

  .site-header[data-open="true"] .nav-scrim {
    opacity: 1;
    visibility: visible;
  }

  html.nav-open { overflow: hidden; }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .mobile-bar { display: none; }
  .scroll-meter { left: var(--rail-w); }
  .skip-link { left: calc(var(--rail-w) + 12px); }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-cn);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--signal);
  border-color: var(--signal);
  color: #04201b;
}

.btn--primary:hover { background: #5cf3dd; border-color: #5cf3dd; }

.btn--ghost {
  background: transparent;
  border-color: var(--graphite);
  color: var(--cool);
}

.btn--ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
  background: rgba(0,229,195,.07);
}

.btn--amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #2a1204;
}

.btn--amber:hover { background: #ffa366; border-color: #ffa366; }

.btn--block { width: 100%; }

/* ---------- surfaces ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--graphite);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(16,41,61,.92), rgba(13,33,49,.92));
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--signal);
  opacity: .55;
}

.card--quiet {
  background: rgba(16,41,61,.45);
}

.card--paper {
  background: var(--paper);
  border-color: rgba(11,28,44,.14);
  color: #22303a;
}

.card--paper h2,
.card--paper h3,
.card--paper h4 { color: var(--ink); }

.card--paper p { color: #3a4a56; }

.card--paper::before { background: var(--teal); }

.band {
  position: relative;
  padding: clamp(20px, 3.2vw, 36px) 0;
  border-top: 1px solid rgba(42,63,82,.9);
  border-bottom: 1px solid rgba(42,63,82,.9);
  background: linear-gradient(90deg, rgba(255,138,61,.13), rgba(255,138,61,.03) 55%, transparent);
}

.band::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(48px, 10vw, 120px);
  height: 2px;
  background: var(--amber);
}

.band--signal {
  background: linear-gradient(90deg, rgba(0,229,195,.12), rgba(0,229,195,.02) 60%, transparent);
}

.band--signal::before { background: var(--signal); }

.chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(56px, 10vw, 120px);
  line-height: .8;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(201,214,223,.35);
}

.divider {
  height: 1px;
  margin: clamp(24px, 4vw, 48px) 0;
  background: linear-gradient(90deg, var(--graphite), transparent);
}

/* ---------- breadcrumb ---------- */
.breadcrumb { padding-block: 18px; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
}

.breadcrumb li { display: flex; align-items: center; gap: 6px; }

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

.breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--signal); }

.breadcrumb [aria-current="page"] { color: var(--cool); }

/* ---------- reading ---------- */
.reading-sheet {
  width: 100%;
  max-width: 720px;
  margin-inline: auto;
  padding: clamp(22px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: #22303a;
  box-shadow: 0 30px 80px rgba(0,0,0,.35);
}

.reading-sheet h2,
.reading-sheet h3,
.reading-sheet h4 { color: var(--ink); }

.reading-sheet p,
.reading-sheet li { color: #33424d; }

.reading-sheet a { color: var(--teal); }

.reading-sheet .label { color: var(--teal); }

/* ---------- media ---------- */
.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 120% at 10% 0%, rgba(0,229,195,.16), transparent 55%),
    linear-gradient(140deg, #10293D, #0B1C2C);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(11,28,44,.72);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--cool);
}

/* ---------- data ---------- */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--graphite);
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.data-table th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--graphite);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--mist);
  white-space: nowrap;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid rgba(42,63,82,.6);
  color: var(--cool);
  vertical-align: top;
}

.data-table tr:last-child td { border-bottom: 0; }
.data-table tbody tr:hover td { background: rgba(0,229,195,.05); }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--graphite);
  border-radius: 999px;
  background: rgba(16,41,61,.6);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--cool);
}

.tag--signal {
  border-color: rgba(0,229,195,.35);
  background: rgba(0,229,195,.08);
  color: var(--signal);
}

.tag--amber {
  border-color: rgba(255,138,61,.35);
  background: rgba(255,138,61,.08);
  color: var(--amber);
}

/* ---------- disclosure ---------- */
.disclosure {
  border: 1px solid var(--graphite);
  border-radius: var(--radius-md);
  background: rgba(16,41,61,.55);
  overflow: hidden;
}

.disclosure + .disclosure { margin-top: 10px; }

.disclosure__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: none;
  color: var(--paper);
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.disclosure__trigger::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--signal);
}

.disclosure__trigger[aria-expanded="true"]::after { content: "–"; }

.disclosure__panel {
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cool);
}

/* ---------- reveal ---------- */
.reveal { opacity: 1; transform: none; }

html.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 112px);
  background: linear-gradient(180deg, #081521 0%, #0B1C2C 100%);
  border-top: 1px solid var(--graphite);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--signal) 18%, rgba(0,229,195,.1) 55%, var(--amber) 92%, transparent);
  opacity: .65;
}

.site-footer::after {
  content: "SIGNAL";
  position: absolute;
  right: -8px;
  bottom: -26px;
  font-family: var(--font-mono);
  font-size: clamp(80px, 15vw, 190px);
  line-height: 1;
  letter-spacing: .06em;
  color: rgba(201,214,223,.045);
  pointer-events: none;
  user-select: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(36px, 6vw, 72px) clamp(18px, 4vw, 48px) 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
}

@media (min-width: 900px) {
  .footer-top {
    grid-template-columns: minmax(260px, 1fr) 1.5fr;
    align-items: start;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.footer-tagline {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.footer-note {
  margin: 0;
  max-width: 36ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 620px) {
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

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

.footer-col__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--signal);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cool);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.footer-link::before {
  content: "";
  width: 8px;
  height: 1px;
  background: var(--graphite);
  transition: background .18s var(--ease), width .18s var(--ease);
}

.footer-link:hover {
  color: var(--paper);
  transform: translateX(2px);
}

.footer-link:hover::before {
  width: 14px;
  background: var(--signal);
}

.footer-link[aria-current="page"] { color: var(--signal); }

.footer-link[aria-current="page"]::before {
  width: 14px;
  background: var(--signal);
}

.footer-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid rgba(42,63,82,.9);
}

@media (min-width: 768px) {
  .footer-contact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.contact-item { min-width: 0; }

.contact-item__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist);
}

.contact-item__value {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.contact-item__value--mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .01em;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(42,63,82,.9);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--mist);
}

.footer-copy,
.footer-icp { margin: 0; }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .sig-bar { animation: none; opacity: 1; transform: none; }
  .status-dot::after { animation: none; opacity: 0; }
  html.js .reveal,
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- print ---------- */
@media print {
  body {
    padding: 0;
    background: #fff;
    color: #111;
  }

  .site-header,
  .site-footer,
  .scroll-meter,
  .skip-link { display: none !important; }

  a { color: #111; }
}