/* =========================================================
   众博赛场 · Site Kit（/assets/site.css）
   雾白纸面 + 战术板刻线 + 夜赛墨绿 + 沙金刻度 + 哨声橙行动点
   ========================================================= */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; }

/* ---------- tokens ---------- */
:root {
  --c-paper: #F6F3EC;
  --c-sand: #D9A85C;
  --c-sand-soft: #F1D9B0;
  --c-night: #0E2A24;
  --c-forest: #163D33;
  --c-orange: #E8642C;
  --c-slate: #7D93A6;
  --c-slate-soft: #DCE5EA;
  --c-char: #1B1F1D;
  --c-cyan: #27C7B5;
  --c-violet: #6B5AA6;

  --ink-soft: rgba(22, 61, 51, .78);
  --paper-soft: rgba(246, 243, 236, .8);
  --paper-faint: rgba(246, 243, 236, .55);
  --hair: rgba(27, 31, 29, .16);
  --hair-light: rgba(246, 243, 236, .16);

  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --gutter: clamp(18px, 4.2vw, 56px);
  --maxw: 1360px;
  --cut: 12px;

  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: 180ms;

  --cut-tr: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  --cut-tr-sm: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

/* ---------- base ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-char);
  background-color: var(--c-paper);
  background-image: linear-gradient(90deg, rgba(125, 147, 166, .09) 1px, transparent 1px);
  background-size: clamp(96px, 10vw, 160px) 100%;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, h4 { line-height: 1.15; font-weight: 600; letter-spacing: -.01em; }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(14, 42, 36, .14);
}
.btn:focus-visible,
.copy-btn:focus-visible,
.nav-toggle:focus-visible,
.skip-link:focus-visible {
  outline-offset: -3px;
  box-shadow: none;
}

.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;
}

/* ---------- layout ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { position: relative; padding-block: clamp(44px, 6vw, 88px); }
.section--ink { background: var(--c-night); color: var(--c-paper); }
.section--sand { background: var(--c-sand-soft); }
.section--slate { background: var(--c-slate-soft); }
.section--ink .lede { color: var(--paper-soft); }
.section--ink .eyebrow { color: var(--c-sand); }
.section--ink .eyebrow::before { background: var(--c-cyan); }
.section--ink .prose a { color: var(--c-sand); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 32px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.layout-rail {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 72px);
  align-items: start;
}
.rail {
  position: sticky;
  top: clamp(16px, 2vw, 32px);
  display: grid;
  gap: 14px;
}
.rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-soft);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hair);
}
.rail__list { display: grid; gap: 2px; }
.rail__link {
  display: block;
  padding: .45em .6em .45em .8em;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.rail__link:hover { color: var(--c-char); border-left-color: var(--c-sand); background: rgba(241, 217, 176, .45); }
.rail__link[data-active="true"] {
  color: var(--c-char);
  font-weight: 600;
  border-left-color: var(--c-orange);
  background: rgba(241, 217, 176, .62);
}
.field { min-width: 0; }

/* ---------- type ---------- */
.display-title {
  font-size: clamp(44px, 6vw, 96px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -.02em;
}
.display-title em { font-style: normal; font-weight: 700; display: inline-block; transform: skewX(-8deg); }
.section-title { font-size: clamp(26px, 3vw, 44px); font-weight: 600; line-height: 1.14; }
.lede {
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.85;
  color: var(--c-forest);
  max-width: 36em;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink-soft);
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: var(--c-orange);
  transform: skewX(-24deg);
  flex: 0 0 auto;
}
.prose { max-width: 38em; font-size: 16px; line-height: 1.85; }
.prose p + p { margin-top: 1.05em; }
.prose h2 { font-size: clamp(22px, 2.4vw, 30px); margin-block: 1.8em .6em; }
.prose h3 { font-size: clamp(18px, 1.8vw, 22px); margin-block: 1.6em .5em; }
.prose ul, .prose ol { margin-block: 1em; padding-left: 1.2em; list-style: disc; }
.prose li + li { margin-top: .4em; }
.prose a {
  color: var(--c-forest);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 100% 1px;
  background-position: 0 100%;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}
.prose a:hover { background-size: 0 1px; color: var(--c-orange); }
.prose blockquote {
  margin-block: 1.4em;
  padding: .9em 1.2em;
  background: var(--c-sand-soft);
  border-left: 3px solid var(--c-orange);
  color: var(--c-forest);
}

/* ---------- decorative rules ---------- */
.rule { height: 1px; border: 0; background: var(--hair); }
.rule--tick {
  height: 10px;
  background-color: transparent;
  background-image: repeating-linear-gradient(90deg, rgba(27, 31, 29, .34) 0 1px, transparent 1px 12px);
}
.accent-line {
  display: inline-block;
  width: 28px; height: 3px;
  background: var(--c-orange);
  transform: skewX(-24deg);
  vertical-align: middle;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .82em 1.5em;
  font-size: 14px;
  letter-spacing: .06em;
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  clip-path: var(--cut-tr);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn::after {
  content: "";
  width: 14px; height: 1px;
  background: currentColor;
  transform: scaleX(.7);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.btn:hover::after { transform: scaleX(1.5); }
.btn--primary { background: var(--c-forest); color: var(--c-paper); }
.btn--primary:hover { background: var(--c-night); color: var(--c-sand); }
.btn--ghost { border-color: var(--c-forest); color: var(--c-forest); }
.btn--ghost:hover { background: var(--c-sand-soft); border-color: var(--c-sand-soft); color: var(--c-forest); }
.btn--quiet { border-color: var(--hair-light); color: var(--c-paper); }
.btn--quiet:hover { background: rgba(246, 243, 236, .12); border-color: rgba(246, 243, 236, .55); color: var(--c-sand-soft); }
.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .2em .55em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  line-height: 1.6;
  background: var(--c-sand-soft);
  color: var(--c-forest);
  clip-path: var(--cut-tr-sm);
}
.tag--round { background: var(--c-slate-soft); }
.tag--violet { background: var(--c-violet); color: var(--c-paper); }

/* ---------- breadcrumb ---------- */
.breadcrumb { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; }
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: .55em; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: .55em; color: var(--ink-soft); }
.breadcrumb__item + .breadcrumb__item::before { content: "／"; color: var(--c-slate); }
.breadcrumb__link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumb__link:hover { color: var(--c-forest); border-bottom-color: var(--c-orange); }
.breadcrumb__item[aria-current="page"] { color: var(--c-char); }

/* ---------- plates ---------- */
.plate {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  background: var(--c-paper);
  border: 1px solid var(--hair);
  clip-path: var(--cut-tr);
}
.plate--sand { background: var(--c-sand-soft); border-color: transparent; }
.plate--ink { background: var(--c-night); color: var(--c-paper); border-color: transparent; }
.plate__index { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--c-orange); }
.plate__title { font-size: 19px; font-weight: 600; margin-top: .35em; }
.plate__meta { font-size: 12px; color: var(--ink-soft); margin-top: .6em; }
.plate--ink .plate__meta { color: var(--paper-faint); }

/* ---------- stats ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: clamp(16px, 2.4vw, 30px);
}
.stat { display: flex; flex-direction: column; gap: .25em; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 64px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-soft);
}
.section--ink .stat__label { color: var(--paper-faint); }

/* ---------- data table ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}
.data-table caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-soft);
  padding-bottom: .7em;
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--c-forest);
  background: var(--c-slate-soft);
  padding: .7em .8em;
  border-bottom: 1px solid rgba(27, 31, 29, .2);
  text-align: left;
}
.data-table td {
  padding: .7em .8em;
  border-bottom: 1px solid rgba(27, 31, 29, .1);
  vertical-align: top;
}
.data-table tbody tr:nth-child(even) { background: rgba(220, 229, 234, .45); }
.data-table .num {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- media ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--c-night);
  clip-path: var(--cut-tr);
}
.media > img,
.media > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media--placeholder {
  background-image:
    repeating-linear-gradient(135deg, rgba(246, 243, 236, .07) 0 2px, transparent 2px 15px),
    linear-gradient(0deg, var(--c-night), var(--c-forest));
}
.media__scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(14, 42, 36, 0) 42%, rgba(14, 42, 36, .8) 100%);
}
.media__caption {
  position: absolute;
  left: 0; bottom: 0;
  max-width: 46ch;
  padding: clamp(12px, 1.6vw, 20px);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--c-paper);
}
.media__badge {
  position: absolute;
  top: 0; left: 0;
  padding: .35em .7em;
  background: var(--c-sand);
  color: var(--c-forest);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}
.media--violet .media__badge { background: var(--c-violet); color: var(--c-paper); }

/* ---------- scroll progress (injected by JS) ---------- */
.page-progress {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: 3px;
  z-index: 90;
  pointer-events: none;
}
.page-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--c-orange), var(--c-sand) 60%, var(--c-cyan));
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0; left: 0;
  z-index: 120;
  padding: .7em 1.1em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-paper);
  background: var(--c-night);
  text-decoration: none;
  clip-path: var(--cut-tr-sm);
  transform: translateY(-130%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- masthead ---------- */
.masthead {
  position: relative;
  z-index: 60;
  background: var(--c-paper);
  border-bottom: 1px solid var(--hair);
}
.masthead__rail { background: var(--c-night); color: rgba(246, 243, 236, .8); }
.masthead__rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 34px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}
.masthead__rail-text {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.masthead__rail-text--end { justify-content: flex-end; color: rgba(246, 243, 236, .55); }
.masthead__tick {
  flex: 0 0 auto;
  width: 18px; height: 2px;
  background: var(--c-orange);
  transform: skewX(-24deg);
}
.masthead__main { padding-block: clamp(12px, 1.6vw, 20px); }
.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 4vw, 60px);
  min-height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .75em;
  min-width: 0;
  text-decoration: none;
  color: var(--c-char);
}
.brand__slash {
  flex: 0 0 auto;
  width: 10px; height: 36px;
  background: var(--c-sand);
  clip-path: polygon(38% 0, 100% 0, 62% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease);
}
.brand:hover .brand__slash { background: var(--c-orange); }
.brand__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand__mark {
  font-size: clamp(20px, 2.1vw, 26px);
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.1;
  white-space: nowrap;
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  line-height: 1.5;
  color: var(--ink-soft);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .6em;
  padding: .58em .85em;
  background: var(--c-night);
  color: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  cursor: pointer;
  clip-path: var(--cut-tr-sm);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { background: var(--c-forest); color: var(--c-sand-soft); }
.nav-toggle__bars { display: flex; flex-direction: column; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3px) rotate(-45deg); }
.nav-toggle__label { white-space: nowrap; }

.site-nav { display: flex; justify-content: flex-end; }
.site-nav__list {
  display: flex;
  align-items: flex-start;
  gap: clamp(10px, 1.6vw, 26px);
}
.site-nav__item { display: flex; }
.site-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: .3em 0 .55em;
  text-decoration: none;
  color: var(--c-char);
  font-size: 14px;
  letter-spacing: .06em;
  line-height: 1.2;
  transition: color var(--dur) var(--ease);
}
.site-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: rgba(125, 147, 166, 1);
  transition: color var(--dur) var(--ease);
}
.site-nav__label { position: relative; display: inline-block; white-space: nowrap; }
.site-nav__label::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.site-nav__link:hover .site-nav__label::after,
.site-nav__link:focus-visible .site-nav__label::after { transform: scaleX(1); }
.site-nav__link:hover .site-nav__index { color: var(--c-violet); }
.site-nav__link[aria-current="page"] { font-weight: 600; }
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--c-orange); }
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--c-orange);
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 104px);
  background: var(--c-night);
  color: var(--c-paper);
  overflow: hidden;
}
.site-footer__scale {
  height: 10px;
  background-image: repeating-linear-gradient(90deg, rgba(217, 168, 92, .6) 0 1px, transparent 1px 14px);
  border-bottom: 1px solid var(--hair-light);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(32px, 5vw, 80px);
  padding-block: clamp(36px, 5vw, 64px);
}
.site-footer__lead { min-width: 0; }
.site-footer__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-sand);
}
.site-footer__tick {
  width: 20px; height: 2px;
  background: var(--c-orange);
  transform: skewX(-24deg);
  flex: 0 0 auto;
}
.site-footer__wordmark {
  margin-top: .35em;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 300;
  letter-spacing: .14em;
  line-height: 1.1;
}
.site-footer__summary {
  margin-top: 1em;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.9;
  color: var(--paper-soft);
}
.site-footer__cta { margin-top: 22px; }

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  min-width: 0;
}
.site-footer__col { min-width: 0; }
.site-footer__col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--c-sand);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--hair-light);
}
.site-footer__list { display: grid; gap: 9px; }
.site-footer__link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(246, 243, 236, .86);
  text-decoration: none;
  background-image: linear-gradient(var(--c-sand), var(--c-sand));
  background-repeat: no-repeat;
  background-size: 0 1px;
  background-position: 0 100%;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}
.site-footer__link:hover { color: var(--c-sand); background-size: 100% 1px; }

.site-footer__contact { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.site-footer__contact + .site-footer__contact { margin-top: 10px; }
.site-footer__contact-label {
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--paper-faint);
}
.site-footer__mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  letter-spacing: .01em;
  color: rgba(246, 243, 236, .9);
  overflow-wrap: anywhere;
}
.copy-btn {
  align-self: flex-start;
  margin-top: 6px;
  padding: .26em .62em;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  cursor: pointer;
  color: rgba(246, 243, 236, .82);
  border: 1px solid rgba(246, 243, 236, .32);
  background: transparent;
  clip-path: var(--cut-tr-sm);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover { background: rgba(246, 243, 236, .12); color: var(--c-paper); border-color: rgba(246, 243, 236, .55); }
.copy-btn[data-copied="true"] { background: var(--c-sand-soft); color: var(--c-night); border-color: var(--c-sand-soft); }
.copy-btn[data-copied="false"] { background: rgba(232, 100, 44, .24); color: var(--c-paper); border-color: rgba(232, 100, 44, .6); }

.site-footer__strip { border-top: 1px solid var(--hair-light); padding-block: 16px; }
.site-footer__strip-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 28px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  line-height: 1.7;
  color: rgba(246, 243, 236, .62);
}
.site-footer__strip-item { min-width: 0; }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .site-nav__list { gap: clamp(8px, 1.3vw, 18px); }
  .site-nav__link { font-size: 13px; }
  .brand__tagline { font-size: 10px; }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    display: none;
    justify-content: flex-start;
    padding-block: 14px 18px;
    background: var(--c-night);
    border-top: 1px solid var(--hair-light);
    box-shadow: 0 26px 44px -32px rgba(14, 42, 36, .95);
  }
  .site-nav[data-open="true"] { display: block; }
  .site-nav__list {
    display: flex;
    overflow-x: auto;
    gap: 18px;
    padding-inline: var(--gutter);
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
    scrollbar-color: rgba(217, 168, 92, .6) transparent;
  }
  .site-nav__item { flex: 0 0 auto; scroll-snap-align: start; }
  .site-nav__link { color: rgba(246, 243, 236, .86); font-size: 13px; padding-block: .35em .6em; }
  .site-nav__index { color: rgba(246, 243, 236, .5); }
  .site-nav__link:hover .site-nav__index { color: var(--c-sand); }
  .site-nav__link[aria-current="page"] { color: var(--c-paper); }
  .site-nav__link[aria-current="page"] .site-nav__index { color: var(--c-orange); }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 820px) {
  .layout-rail { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .rail { position: static; gap: 10px; }
  .rail__list {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }
  .rail__link {
    flex: 0 0 auto;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
    background: rgba(220, 229, 234, .4);
    padding: .4em .8em;
  }
  .rail__link:hover { border-bottom-color: var(--c-sand); border-left-color: transparent; }
  .rail__link[data-active="true"] { border-left-color: transparent; border-bottom-color: var(--c-orange); }

  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .display-title { font-size: clamp(38px, 10vw, 64px); }
  .site-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .masthead__rail-text--end { display: none; }
  .masthead__rail-inner { justify-content: flex-start; }
  .brand__slash { height: 30px; width: 8px; }
  .brand__tagline { display: none; }
  .masthead__inner { gap: 12px; }
  .site-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .site-footer__wordmark { letter-spacing: .1em; }
  .site-footer__strip-inner { font-size: 10.5px; }
  .stat-grid { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
}

/* ---------- print ---------- */
@media print {
  body { background: #fff; color: #000; }
  .masthead, .site-footer, .page-progress, .rail { display: none !important; }
  .section { padding-block: 12pt; }
  a { text-decoration: underline; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .skip-link { transform: none; }
  .page-progress__bar { transition: none; }
}