:root {
  --ink-900: #050B14;
  --ink-800: #081426;
  --ink-700: #0F2440;
  --ink-600: #16365A;
  --cyan: #46E0D2;
  --cyan-deep: #1E9E98;
  --signal: #FF5A36;
  --paper: #F3EEE3;
  --stone: #8A8F98;
  --moss: #7E9A6A;
  --clay: #B96F56;
  --mist: #A9C2D8;
  --line: rgba(169, 194, 216, .18);
  --line-strong: rgba(169, 194, 216, .34);
  --line-soft: rgba(169, 194, 216, .1);
  --header-h: 66px;
  --rail-w: 238px;
  --radius: 2px;
  --shadow-stack: 0 0 0 1px rgba(5, 11, 20, .92), 9px 9px 0 rgba(5, 11, 20, .34);
  --font-display: "Barlow Condensed", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
}

body {
  margin: 0;
  padding-top: var(--header-h);
  background: var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(70, 224, 210, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70, 224, 210, .035) 1px, transparent 1px);
  background-size: 72px 72px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: .01em;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; }
a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--paper); }
button { font: inherit; color: inherit; }
strong { font-weight: 700; }

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: .06em;
  text-decoration: none;
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); color: var(--ink-900); }

/* ---------- HEADER ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
}

.header-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--header-h);
  padding: 0 16px;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800));
  border-bottom: 1px solid var(--line);
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  z-index: 2;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--signal));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--paper);
  text-decoration: none;
  padding: 4px 2px;
}
.brand:hover { color: var(--paper); }

.brand-mark {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  width: 24px;
  height: 26px;
}
.brand-mark__bar {
  display: block;
  width: 5px;
  border-radius: 1px;
  background: var(--cyan);
}
.brand-mark__bar:nth-child(1) { height: 10px; opacity: .5; }
.brand-mark__bar:nth-child(2) { height: 17px; opacity: .8; }
.brand-mark__bar:nth-child(3) { height: 26px; background: var(--signal); }

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: .12em;
  color: var(--paper);
}
.brand-tag {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .14em;
  color: var(--stone);
}

.header-status {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--mist);
}
.header-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(70, 224, 210, .16);
}
.header-status__text { white-space: nowrap; }

.nav-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  background: rgba(70, 224, 210, .08);
  border: 1px solid rgba(70, 224, 210, .45);
  border-radius: var(--radius);
  color: var(--cyan);
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
.nav-toggle:hover { background: rgba(70, 224, 210, .16); border-color: var(--cyan); }
.nav-toggle__box { display: flex; flex-direction: column; gap: 3px; width: 16px; }
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 1px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.site-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  top: auto;
  z-index: 130;
  max-height: min(80vh, 580px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 18px calc(20px + env(safe-area-inset-bottom, 0px));
  background: var(--ink-700);
  border-top: 1px solid var(--line-strong);
  border-radius: 14px 14px 0 0;
  box-shadow: 0 -22px 48px rgba(5, 11, 20, .7);
  transform: translateY(104%);
  visibility: hidden;
  transition: transform .3s cubic-bezier(.22, .7, .3, 1), visibility .3s;
}
.site-nav[data-open] {
  transform: translateY(0);
  visibility: visible;
}

.nav-legend {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-strong);
}

.nav-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}
.nav-item { margin: 0; }

.nav-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 10px;
  color: var(--mist);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .04em;
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}
.nav-link:hover {
  background: rgba(70, 224, 210, .1);
  color: var(--paper);
  border-left-color: var(--cyan);
  transform: translateX(2px);
}
.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(70, 224, 210, .09);
  border-left-color: var(--signal);
  font-weight: 700;
}
.nav-link__num {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--stone);
}
.nav-link[aria-current="page"] .nav-link__num { color: var(--signal); }
.nav-link__text { white-space: nowrap; }

.nav-entries {
  display: grid;
  gap: 8px;
  margin-top: 4px;
}
.entry-chip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  background: rgba(70, 224, 210, .07);
  border: 1px solid rgba(70, 224, 210, .48);
  border-radius: var(--radius);
  color: var(--paper);
  text-decoration: none;
  font-size: .84rem;
  letter-spacing: .05em;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
.entry-chip:hover {
  background: rgba(70, 224, 210, .15);
  border-color: var(--cyan);
  color: var(--paper);
  transform: translateY(-1px);
}
.entry-chip--signal {
  background: rgba(255, 90, 54, .09);
  border-color: rgba(255, 90, 54, .58);
}
.entry-chip--signal:hover {
  background: rgba(255, 90, 54, .18);
  border-color: var(--signal);
}
.entry-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 90, 54, .16);
}
.entry-chip__label { font-weight: 600; }
.entry-chip__meta {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .12em;
  color: var(--stone);
}

.nav-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding: 13px 16px;
  background: var(--signal);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: .08em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.nav-cta:hover {
  color: var(--ink-900);
  background: #ff6f4f;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(255, 90, 54, .26);
}
.nav-cta__arrow { font-family: var(--font-mono); font-size: 1rem; }

/* ---------- FOOTER ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(40px, 6vw, 84px);
  background: var(--ink-900);
  border-top: 1px solid var(--line-strong);
}
.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0 22%, var(--ink-900) 22% 24%, var(--signal) 24% 32%, var(--ink-900) 32% 100%);
}

.footer-panel {
  width: min(1180px, 100% - 36px);
  margin: 0 auto;
  padding: clamp(34px, 5vw, 62px) 0 clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 42px);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: .08em;
  color: var(--paper);
}
.footer-brand__line {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--cyan);
}
.footer-brand__note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: .84rem;
  line-height: 1.8;
  color: var(--stone);
}
.footer-brand__area {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--mist);
}
.footer-brand__key {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-900);
  background: var(--moss);
  padding: 3px 7px;
  border-radius: var(--radius);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 24px 20px;
}
.footer-col__title {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.footer-col__list { margin-top: 12px; display: grid; gap: 9px; }
.footer-link {
  color: var(--mist);
  font-size: .88rem;
  text-decoration: none;
  transition: color .18s ease, padding-left .18s ease;
  border-left: 1px solid transparent;
  padding-left: 0;
}
.footer-link:hover {
  color: var(--cyan);
  padding-left: 7px;
  border-left-color: var(--signal);
}

.footer-contact__title {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.footer-contact__item {
  margin-top: 12px;
  display: grid;
  gap: 2px;
  font-size: .84rem;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--stone);
}

.footer-base {
  width: min(1180px, 100% - 36px);
  margin: 0 auto;
  padding: 16px 0 30px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: var(--stone);
}
.footer-base__copy { color: var(--mist); }
.footer-base__icp { color: var(--stone); }
.footer-base__link {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.footer-base__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ---------- SHARED PAGE PRIMITIVES ---------- */
.container {
  width: min(1180px, 100% - 36px);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.panel {
  position: relative;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
  padding: clamp(20px, 3vw, 34px);
}
.panel--raised {
  background: linear-gradient(160deg, var(--ink-600), var(--ink-700) 62%, var(--ink-800));
  border-color: var(--line-strong);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--signal);
  display: block;
}

.section-title {
  margin-top: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  letter-spacing: .02em;
  color: var(--paper);
}

.lede {
  margin-top: 14px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.note {
  font-size: .78rem;
  line-height: 1.7;
  color: var(--stone);
}

.mono {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .06em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--stone);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  border-radius: var(--radius);
  background: rgba(169, 194, 216, .14);
  color: var(--mist);
  border: 1px solid rgba(169, 194, 216, .26);
  white-space: nowrap;
}
.tag--cyan { background: rgba(70, 224, 210, .16); color: var(--cyan); border-color: rgba(70, 224, 210, .42); }
.tag--moss { background: var(--moss); color: var(--ink-900); border-color: transparent; }
.tag--clay { background: var(--clay); color: var(--ink-900); border-color: transparent; }
.tag--signal { background: var(--signal); color: var(--ink-900); border-color: transparent; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .96rem;
  letter-spacing: .07em;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.btn--signal {
  background: var(--signal);
  color: var(--ink-900);
}
.btn--signal:hover {
  color: var(--ink-900);
  background: #ff6f4f;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(255, 90, 54, .26);
}
.btn--ghost {
  background: rgba(70, 224, 210, .06);
  border-color: rgba(70, 224, 210, .55);
  color: var(--cyan);
}
.btn--ghost:hover {
  color: var(--paper);
  background: rgba(70, 224, 210, .16);
  border-color: var(--cyan);
  transform: translateY(-2px);
}
.btn--quiet {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--mist);
}
.btn--quiet:hover { color: var(--paper); border-color: var(--mist); }

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--line-strong), transparent 78%);
  margin: clamp(20px, 3vw, 34px) 0;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--stone);
}
.breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.breadcrumbs a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumbs__sep { color: rgba(169, 194, 216, .38); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--ink-600);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  aspect-ratio: 16 / 7;
}
.img-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(8, 20, 38, 0) 44%, rgba(8, 20, 38, .74) 100%),
    repeating-linear-gradient(90deg, rgba(70, 224, 210, .06) 0 1px, transparent 1px 46px);
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s ease;
}
html[data-js] [data-reveal="in"] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- BREAKPOINTS ---------- */
@media (min-width: 640px) {
  .header-bar { padding: 0 22px; }
  .header-status { display: inline-flex; }
  .nav-toggle { margin-left: 0; }
  .nav-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .nav-entries { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 768px) {
  .footer-panel { grid-template-columns: 1.1fr 1.4fr; }
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-w);
  }

  .header-bar {
    padding-left: 20px;
    border-bottom: 1px solid var(--line-strong);
  }
  .header-bar::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), rgba(70, 224, 210, 0) 48%);
    opacity: .55;
    pointer-events: none;
  }

  .nav-toggle { display: none; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    bottom: 0;
    right: auto;
    width: var(--rail-w);
    max-height: none;
    z-index: 110;
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 22px 16px 24px;
    background: var(--ink-800);
    border-top: 0;
    border-right: 1px solid var(--line-strong);
    border-radius: 0;
    box-shadow: 1px 0 0 rgba(5, 11, 20, .8);
    transform: none;
    visibility: visible;
    overflow-y: auto;
  }
  .site-nav[data-open] { transform: none; visibility: visible; }

  .nav-list { grid-template-columns: 1fr; }
  .nav-entries { grid-template-columns: 1fr; margin-top: 6px; }
  .nav-cta { margin-top: auto; }

  .footer-panel { grid-template-columns: 1.25fr 1.5fr 1fr; }
}

@media (min-width: 1280px) {
  :root { --rail-w: 258px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .site-nav,
  .nav-link,
  .entry-chip,
  .nav-cta,
  .btn,
  .footer-link { transition: none !important; }
  html[data-js] [data-reveal],
  html[data-js] [data-reveal="in"] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}