/* =========================================================
   球盟会赛场 / site.css
   夜场战术板外壳：深墨绿 + 夜场蓝 + 雾白 + 荧光草绿
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

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

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0B1F1A;
  --ink-deep: #07130F;
  --blue: #0E1B2E;
  --mist: #F3F6EF;
  --grass: #B7FF3C;
  --flare: #FF5A3C;
  --cyan: #36E0C8;
  --line: #2A3A33;
  --cold: #97A69E;
  --amber: #C77A2E;

  --font-display: "HarmonyOS Sans SC", "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", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --maxw: 1320px;
  --pad: clamp(20px, 4.6vw, 64px);
  --gap: clamp(16px, 2vw, 28px);
  --radius: 2px;

  --rail-h: 32px;
  --bar-h: 64px;
  --header-h: 96px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. Base typography ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 78% -12%, rgba(14, 27, 46, 0.85), transparent 70%),
    radial-gradient(760px 480px at 6% 4%, rgba(42, 58, 51, 0.55), transparent 70%);
  background-repeat: no-repeat;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(40px, 6vw, 96px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); }

p { max-width: 68ch; }

strong { font-weight: 700; }

main { padding-top: var(--header-h); }

#main-content { scroll-margin-top: calc(var(--header-h) + 12px); }

/* ---------- 4. Utilities ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grass);
  animation: dot-pulse 2.4s ease-out infinite;
  flex: 0 0 auto;
}

@keyframes dot-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(183, 255, 60, 0.45); }
  70%  { box-shadow: 0 0 0 8px rgba(183, 255, 60, 0); }
  100% { box-shadow: 0 0 0 0 rgba(183, 255, 60, 0); }
}

/* ---------- 5. Layout ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.container--narrow { max-width: 880px; }

.section {
  position: relative;
  padding-block: clamp(56px, 8vw, 120px);
}

.section--tight { padding-block: clamp(32px, 5vw, 64px); }

.section--mist {
  background: var(--mist);
  color: var(--ink);
}

.section--blue {
  background: var(--blue);
  color: var(--mist);
}

.grid {
  display: grid;
  gap: var(--gap);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: 5fr 7fr; }
.grid--split-rev { grid-template-columns: 7fr 5fr; }

/* ---------- 6. Section chrome ---------- */
.section-head {
  display: grid;
  gap: 14px;
  max-width: 860px;
  margin-bottom: clamp(28px, 4vw, 56px);
}

.section-num {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--grass);
}

.section-num::after {
  content: "";
  width: clamp(28px, 6vw, 72px);
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 54px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.section-lede {
  font-size: clamp(16px, 1.4vw, 18px);
  color: rgba(243, 246, 239, 0.72);
}

.section--mist .section-num { color: rgba(11, 31, 26, 0.4); }
.section--mist .section-lede { color: #3D4E46; }
.section--mist .kicker { color: #55665E; }

.kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cold);
  text-transform: uppercase;
}

/* ---------- 7. Buttons & links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.03em;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
              border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

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

.btn--sm {
  min-height: 40px;
  padding: 10px 16px;
  font-size: 14px;
}

.btn--grass {
  background: var(--grass);
  color: var(--ink);
}

.btn--grass:hover,
.btn--grass:focus-visible {
  background: var(--cyan);
  color: var(--ink-deep);
}

.btn--ghost {
  border-color: rgba(243, 246, 239, 0.28);
  color: var(--mist);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--grass);
  color: var(--grass);
  background: rgba(183, 255, 60, 0.08);
}

.btn--flare {
  background: var(--flare);
  color: #1A0A06;
}

.btn--flare:hover,
.btn--flare:focus-visible { background: #ff7557; }

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

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--grass);
  border-bottom: 1px solid transparent;
}

.link-arrow::after {
  content: "\2192";
  transition: transform 0.2s var(--ease);
}

.link-arrow:hover::after { transform: translateX(4px); }

.section--mist .link-arrow { color: #16603F; }

/* ---------- 8. Data & surfaces ---------- */
.surface {
  position: relative;
  background: rgba(14, 27, 46, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
}

.surface--mist {
  background: var(--mist);
  color: var(--ink);
  border-color: rgba(11, 31, 26, 0.14);
}

.surface__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cold);
}

.data-figure {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(40px, 6vw, 80px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.data-figure--grass { color: var(--grass); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 27, 46, 0.6);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cold);
  white-space: nowrap;
}

.chip--grass {
  color: var(--grass);
  border-color: rgba(183, 255, 60, 0.45);
  background: rgba(183, 255, 60, 0.1);
}

.chip--flare {
  color: var(--flare);
  border-color: rgba(255, 90, 60, 0.45);
  background: rgba(255, 90, 60, 0.1);
}

/* ---------- 9. Media containers (page stage) ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, var(--blue), var(--ink) 72%);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 58, 51, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 58, 51, 0.55) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.55;
  pointer-events: none;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 12px 16px;
  background: linear-gradient(90deg, rgba(11, 31, 26, 0.92), rgba(11, 31, 26, 0));
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--grass);
}

/* ---------- 10. Breadcrumbs ---------- */
.breadcrumbs {
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cold);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.breadcrumbs__list li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.breadcrumbs a:hover { color: var(--grass); }

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

.section--mist .breadcrumbs { color: #55665E; }
.section--mist .breadcrumbs [aria-current="page"] { color: var(--ink); }

/* ---------- 11. Tabs ---------- */
.tabs { position: relative; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.tab {
  position: relative;
  padding: 12px 18px;
  border-radius: var(--radius) var(--radius) 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--cold);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.tab:hover { color: var(--mist); }

.tab[aria-selected="true"] { color: var(--mist); }

.tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--grass);
}

.section--mist .tab { color: #55665E; }
.section--mist .tab:hover,
.section--mist .tab[aria-selected="true"] { color: var(--ink); }

.tab-panel { animation: panel-in 0.24s var(--ease) both; }

.tab-panel[hidden] { display: none; }

@keyframes panel-in {
  from { opacity: 0; transform: translateX(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 12. Reveal ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* ---------- 13. Header ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 12px 18px;
  background: var(--grass);
  color: var(--ink);
  font-weight: 700;
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  color: var(--mist);
  background: transparent;
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(183, 255, 60, 0.35), transparent);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.site-header[data-scrolled="true"] {
  background-color: rgba(11, 31, 26, 0.93);
  -webkit-backdrop-filter: blur(8px) saturate(1.2);
  backdrop-filter: blur(8px) saturate(1.2);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.38);
}

.site-header[data-scrolled="true"]::after { opacity: 1; }

.site-header__rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--rail-h);
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
  border-bottom: 1px solid rgba(42, 58, 51, 0.7);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cold);
}

.rail__label { white-space: nowrap; }

.rail__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  color: rgba(183, 255, 60, 0.85);
}

.site-header__bar {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  height: var(--bar-h);
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--grass), var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-height: 44px;
}

.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  overflow: hidden;
  border: 1px solid rgba(243, 246, 239, 0.28);
  background: linear-gradient(135deg, rgba(183, 255, 60, 0.16), rgba(14, 27, 46, 0.7) 65%);
}

.brand__num {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.06em;
  color: var(--mist);
}

.brand__slash {
  position: absolute;
  left: -16%;
  top: 50%;
  width: 132%;
  height: 1.5px;
  background: var(--grass);
  transform: rotate(-38deg);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--cold);
}

.brand--footer .brand__name { font-size: 18px; }

/* Primary nav */
.primary-nav { margin-left: auto; }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 24px);
  counter-reset: nav;
}

.primary-nav__list > li { counter-increment: nav; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 2px;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: rgba(243, 246, 239, 0.78);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.nav-link::before {
  content: counter(nav, decimal-leading-zero);
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cold);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 2px;
  background: var(--grass);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.24s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--mist); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

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

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.primary-nav__note { display: none; }

/* Header actions */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(243, 246, 239, 0.28);
  border-radius: var(--radius);
  color: var(--mist);
}

.nav-toggle:hover { border-color: var(--grass); color: var(--grass); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), top 0.24s var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 10px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 5px; transform: rotate(-45deg); }

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border-top: 1px solid var(--line);
  color: var(--mist);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(320px, 42%);
  height: 3px;
  background: var(--grass);
}

.site-footer__inner {
  position: relative;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.site-footer__mast {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: clamp(32px, 5vw, 56px) clamp(22px, 3vw, 34px);
  border-bottom: 1px solid rgba(42, 58, 51, 0.9);
}

.footer-mast__line {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 30ch;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 5fr 3fr 4fr;
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(32px, 5vw, 56px);
  border-bottom: 1px solid rgba(42, 58, 51, 0.9);
}

.footer-brand { display: grid; gap: 16px; align-content: start; }

.footer-brand__summary {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 246, 239, 0.72);
  max-width: 42ch;
}

.footer-brand__meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cold);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  align-content: start;
}

.footer-nav__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cold);
}

.footer-nav__list { display: grid; gap: 4px; }

.footer-link {
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(243, 246, 239, 0.75);
  transition: color 0.18s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible { color: var(--grass); }

.footer-contact { display: grid; gap: 14px; align-content: start; }

.footer-contact__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cold);
}

.footer-contact__list { display: grid; gap: 16px; }

.footer-contact__item { display: grid; gap: 4px; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cold);
}

.footer-contact__row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.copy-btn {
  flex: 0 0 auto;
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cold);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.copy-btn:hover {
  color: var(--grass);
  border-color: rgba(183, 255, 60, 0.45);
}

.copy-btn[data-state="done"] {
  color: var(--grass);
  border-color: var(--grass);
}

.footer-contact__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--cold);
  max-width: 40ch;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 20px clamp(24px, 4vw, 40px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cold);
}

.footer-legal__copy { max-width: none; }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-legal__links .footer-link {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 0;
}

/* ---------- 15. Responsive ---------- */
@media (max-width: 1180px) {
  .brand__tagline { display: none; }
}

@media (max-width: 1079px) {
  .site-header__bar { gap: 12px; }

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

  .site-header__actions { margin-left: auto; }

  .primary-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    max-height: calc(100vh - var(--header-h));
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    margin-left: 0;
    padding: 8px var(--pad) 32px;
    background-color: #0A1B16;
    background-image: linear-gradient(rgba(42, 58, 51, 0.45) 1px, transparent 1px);
    background-size: 100% 64px;
    border-top: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s var(--ease);
  }

  .site-header[data-open="true"] .primary-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__list > li { border-bottom: 1px solid rgba(42, 58, 51, 0.8); }

  .nav-link {
    display: flex;
    width: 100%;
    padding: 16px 0;
    gap: 14px;
    font-size: 17px;
    color: var(--mist);
  }

  .nav-link::before {
    display: inline-block;
    font-size: 12px;
    color: var(--cold);
  }

  .nav-link::after { display: none; }

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

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

  .nav-link[aria-current="page"]::after {
    display: block;
    left: 0;
    right: auto;
    bottom: 8px;
    width: 22px;
    height: 3px;
    transform: none;
  }

  .primary-nav__note {
    display: block;
    margin-top: 24px;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.8;
    letter-spacing: 0.06em;
    color: var(--cold);
    max-width: 40ch;
  }

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

@media (max-width: 980px) {
  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split,
  .grid--split-rev { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 760px) {
  :root {
    --rail-h: 0px;
    --bar-h: 68px;
    --header-h: 68px;
  }

  .site-header__rail { display: none; }

  .brand__mark { width: 36px; height: 36px; }

  .primary-nav { top: var(--header-h); }
}

@media (max-width: 680px) {
  .site-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__legal { justify-content: flex-start; }
}

@media (max-width: 430px) {
  .site-header__actions .btn--sm { display: none; }
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 16. Reduced motion ---------- */
@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-dot { animation: none; }

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

  .tab-panel { animation: none; }
}