/* ==========================================================================
   博澳体育官网 · 共享样式 /assets/site.css
   深墨绿底板 · 荧光青数据 · 电光橙确认
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

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

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

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --ink-deep: #051C16;
  --ink-panel: #0B2A22;
  --ink-raised: #123B30;
  --cyan-signal: #2EF2D0;
  --cyan-soft: #8FF8E5;
  --orange-volt: #FF7A1A;
  --orange-deep: #C94A00;
  --warm-white: #F4F0E6;
  --mist: #A9C4BB;
  --glass-line: rgba(244, 240, 230, 0.16);
  --glass-fill: rgba(18, 59, 48, 0.55);

  --font-display: 'Barlow Condensed', 'Oswald', 'Noto Sans SC', sans-serif;
  --font-heading: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'JetBrains Mono', 'IBM Plex Mono', 'Consolas', monospace;

  --gutter: clamp(1rem, 4vw, 2.5rem);
  --shell-max: 1240px;
  --gap: clamp(1rem, 2.2vw, 1.75rem);
  --radius: 3px;
  --speed: 0.26s;
  --ease: cubic-bezier(0.22, 0.8, 0.3, 1);
  --header-h: 74px;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 720px at 82% -12%, rgba(46, 242, 208, 0.10), transparent 62%),
    radial-gradient(900px 640px at -8% 18%, rgba(255, 122, 26, 0.08), transparent 58%),
    var(--ink-deep);
  color: var(--warm-white);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.22;
  color: var(--warm-white);
}

h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }

p { max-width: 62ch; }

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

/* ---------- 4. Layout ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(3rem, 6vw, 5.5rem); }
.section--tight { padding-block: clamp(1.75rem, 3vw, 2.75rem); }

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--glass-line), rgba(244, 240, 230, 0.02));
}

/* ---------- 5. Typography components ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--orange-volt);
  flex: none;
}

.display-xl {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 8vw, 8.5rem);
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--warm-white);
}

.lede {
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  line-height: 1.8;
  color: var(--mist);
  max-width: 56ch;
}

.data-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--cyan-signal);
}

.prose {
  max-width: 62ch;
  color: var(--warm-white);
  line-height: 1.8;
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 {
  margin-top: 2.2em;
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  position: relative;
  padding-left: 1rem;
}

.prose h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 4px;
  height: 0.9em;
  background: var(--cyan-signal);
}

.prose h3 { margin-top: 1.9em; font-size: 1.14rem; color: var(--cyan-soft); }

.prose p { color: var(--mist); }

.prose ul, .prose ol {
  padding-left: 1.15rem;
  color: var(--mist);
}

.prose ul li { list-style: none; position: relative; padding-left: 0.9rem; }
.prose ul li + li, .prose ol li + li { margin-top: 0.5em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--orange-volt);
}

.prose ol { list-style: decimal; }
.prose ol li::marker { color: var(--cyan-signal); font-family: var(--font-data); }

.prose blockquote {
  border-left: 2px solid var(--cyan-signal);
  padding-left: 1.1rem;
  color: var(--warm-white);
  font-size: 1.02rem;
}

.prose strong { color: var(--warm-white); font-weight: 700; }

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.68rem 1.25rem;
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background var(--speed) var(--ease),
              color var(--speed) var(--ease),
              border-color var(--speed) var(--ease),
              transform var(--speed) var(--ease),
              box-shadow var(--speed) var(--ease);
}

.btn--volt {
  background: var(--orange-volt);
  color: var(--ink-deep);
  padding-inline: 1.5rem;
  clip-path: polygon(9px 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}

.btn--volt:hover {
  background: #FF9440;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -12px rgba(255, 122, 26, 0.9);
}

.btn--volt:active { background: var(--orange-deep); color: var(--warm-white); transform: translateY(0); }

.btn--ghost {
  border-color: rgba(46, 242, 208, 0.38);
  background: rgba(46, 242, 208, 0.07);
  color: var(--cyan-soft);
}

.btn--ghost:hover {
  background: rgba(46, 242, 208, 0.18);
  border-color: var(--cyan-signal);
  color: var(--warm-white);
}

.btn--outline {
  border-color: rgba(244, 240, 230, 0.28);
  color: var(--warm-white);
}

.btn--outline:hover {
  border-color: var(--orange-volt);
  color: var(--orange-volt);
}

/* ---------- 7. Shared blocks ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.7rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  border: 1px solid rgba(46, 242, 208, 0.34);
  border-radius: 999px;
  background: rgba(46, 242, 208, 0.06);
  white-space: nowrap;
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease);
}

.pill:hover { background: rgba(46, 242, 208, 0.18); color: var(--warm-white); }

.pill[aria-pressed="true"] {
  background: var(--orange-volt);
  border-color: var(--orange-volt);
  color: var(--ink-deep);
}

.note-glass {
  position: relative;
  padding: 1.1rem 1.25rem;
  background: linear-gradient(140deg, rgba(46, 242, 208, 0.10), rgba(11, 42, 34, 0.62));
  border: 1px solid var(--glass-line);
  border-left: 3px solid var(--cyan-signal);
  border-radius: var(--radius);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.75;
}

.note-glass strong { color: var(--warm-white); }

/* ---------- 8. Media frames ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 100% at 20% 0%, rgba(46, 242, 208, 0.16), transparent 60%),
    linear-gradient(160deg, var(--ink-raised), var(--ink-deep));
  isolation: isolate;
}

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

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.media-frame__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 242, 208, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 242, 208, 0.09) 1px, transparent 1px);
  background-size: 46px 46px;
  mix-blend-mode: screen;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan-soft);
  background: rgba(5, 28, 22, 0.78);
  border-top: 1px solid var(--glass-line);
  border-right: 1px solid var(--glass-line);
  backdrop-filter: blur(6px);
}

/* ---------- 9. Breadcrumbs ---------- */
.breadcrumbs {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 0.4rem; }

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: rgba(169, 196, 187, 0.5);
  margin-right: 0.1rem;
}

.breadcrumbs a { color: var(--mist); transition: color var(--speed) var(--ease); }
.breadcrumbs a:hover { color: var(--cyan-signal); }

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

/* ---------- 10. Reveal protocol ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* ---------- 11. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 200;
  padding: 0.6rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-deep);
  background: var(--cyan-signal);
  border-radius: var(--radius);
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}

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

/* ---------- 12. Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
  background: transparent;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan-signal), var(--orange-volt));
  transition: width 0.08s linear;
}

/* ---------- 13. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 28, 22, 0.86);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--glass-line);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-signal) 20%, transparent 52%, var(--orange-volt) 82%, transparent);
  opacity: 0.7;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: var(--header-h);
  padding-block: 0.65rem;
}

.site-header__brand-zone {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

/* brand mark */
.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.brand-mark__glyph {
  position: relative;
  flex: none;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(46, 242, 208, 0.55);
  background:
    linear-gradient(135deg, rgba(46, 242, 208, 0.22) 0%, rgba(46, 242, 208, 0.04) 46%, transparent 47%),
    var(--ink-raised);
  transform: skewX(-8deg);
  transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.brand-mark__glyph::after {
  content: "";
  position: absolute;
  right: 5px;
  bottom: 5px;
  width: 8px;
  height: 8px;
  background: var(--orange-volt);
}

.brand-mark:hover .brand-mark__glyph {
  border-color: var(--cyan-signal);
  background:
    linear-gradient(135deg, rgba(255, 122, 26, 0.28) 0%, rgba(46, 242, 208, 0.10) 50%, transparent 51%),
    var(--ink-raised);
}

.brand-mark__text { display: block; min-width: 0; }

.brand-mark__name {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.06rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--warm-white);
}

.brand-mark__sub {
  display: block;
  margin-top: 0.14rem;
  font-family: var(--font-data);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

/* floating entry */
.tag-float {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.32rem 0.7rem;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: var(--cyan-soft);
  border: 1px solid rgba(46, 242, 208, 0.42);
  border-radius: 2px;
  background: linear-gradient(120deg, rgba(46, 242, 208, 0.16), rgba(5, 28, 22, 0.25));
  transform: rotate(-1.6deg);
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.tag-float__dot {
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--orange-volt);
  box-shadow: 0 0 0 3px rgba(255, 122, 26, 0.18);
}

.tag-float:hover {
  color: var(--warm-white);
  background: linear-gradient(120deg, rgba(46, 242, 208, 0.3), rgba(5, 28, 22, 0.35));
  transform: rotate(-1.6deg) translateY(-1px);
}

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: none;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: rgba(18, 59, 48, 0.5);
  transition: border-color var(--speed) var(--ease), background var(--speed) var(--ease);
}

.nav-toggle:hover { border-color: var(--cyan-signal); background: rgba(46, 242, 208, 0.12); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 20px;
  height: 12px;
}

.nav-toggle__bars i {
  position: absolute;
  left: 0;
  height: 2px;
  width: 100%;
  background: var(--warm-white);
  transition: transform var(--speed) var(--ease), width var(--speed) var(--ease), background var(--speed) var(--ease);
}

.nav-toggle__bars i:nth-child(1) { top: 0; }
.nav-toggle__bars i:nth-child(2) { bottom: 0; width: 68%; }

.nav-toggle[aria-expanded="true"] { border-color: var(--orange-volt); }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i { background: var(--orange-volt); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { width: 100%; transform: translateY(-5px) rotate(-45deg); }

/* nav zone */
.site-header__nav-zone {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  min-width: 0;
}

.primary-nav { min-width: 0; }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  counter-reset: navitem;
}

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

.primary-nav a {
  position: relative;
  display: block;
  padding: 0.55rem 0.62rem;
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--mist);
  transition: color var(--speed) var(--ease);
}

.primary-nav a::before {
  content: counter(navitem, decimal-leading-zero);
  margin-right: 0.34rem;
  font-family: var(--font-data);
  font-size: 0.56rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  vertical-align: 0.14em;
  color: rgba(169, 196, 187, 0.55);
  transition: color var(--speed) var(--ease);
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0.62rem;
  right: 0.62rem;
  bottom: 0.26rem;
  height: 2px;
  background: var(--cyan-signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--speed) var(--ease), background var(--speed) var(--ease);
}

.primary-nav a:hover { color: var(--warm-white); }
.primary-nav a:hover::after { transform: scaleX(1); }
.primary-nav a:hover::before { color: var(--cyan-signal); }

.primary-nav a[aria-current="page"] { color: var(--warm-white); }
.primary-nav a[aria-current="page"]::after { transform: scaleX(1); background: var(--orange-volt); }
.primary-nav a[aria-current="page"]::before { color: var(--orange-volt); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-left: 1.2rem;
  border-left: 1px solid var(--glass-line);
  flex: none;
}

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3.5rem, 7vw, 6rem);
  background: linear-gradient(180deg, rgba(11, 42, 34, 0.42), var(--ink-panel) 55%, rgba(5, 28, 22, 0.98));
  border-top: 1px solid var(--glass-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-signal), rgba(46, 242, 208, 0.05) 42%, var(--orange-volt));
  opacity: 0.6;
  pointer-events: none;
}

.site-footer__inner { padding-block: clamp(2.25rem, 4vw, 3.25rem) 1.5rem; }

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) 2.2fr;
  gap: 2.5rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--glass-line);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--warm-white);
  text-transform: uppercase;
}

.footer-brand__line {
  margin-top: 0.85rem;
  max-width: 30ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.footer-brand__line--meta {
  margin-top: 0.6rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(46, 242, 208, 0.72);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.footer-col__title {
  margin-bottom: 0.9rem;
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.footer-col__list li + li { margin-top: 0.5rem; }

.footer-col__list a {
  display: inline-block;
  font-size: 0.88rem;
  color: var(--mist);
  transition: color var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}

.footer-col__list a:hover {
  color: var(--warm-white);
  padding-left: 0.28rem;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.9rem 2rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--glass-line);
}

.footer-contact__title {
  flex: none;
  padding-left: 0.75rem;
  border-left: 3px solid var(--orange-volt);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--warm-white);
}

.footer-contact__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.75rem;
  min-width: 0;
}

.footer-contact__key {
  margin-right: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.footer-contact__value {
  font-size: 0.88rem;
  color: var(--warm-white);
  word-break: break-word;
}

.footer-contact__note {
  flex: 1 1 320px;
  max-width: 56ch;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

.footer-contact__cta { flex: none; }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.75rem;
  padding-top: 1.5rem;
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

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

.footer-icp { max-width: none; color: rgba(169, 196, 187, 0.85); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.footer-legal a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.footer-legal a:hover {
  color: var(--cyan-signal);
  border-bottom-color: var(--cyan-signal);
}

/* ---------- 15. Responsive ---------- */
@media (max-width: 1080px) {
  .site-header__inner { flex-wrap: wrap; }

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

  .site-header__nav-zone {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    padding: 0 var(--gutter);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: var(--ink-panel);
    border-bottom: 1px solid var(--glass-line);
    box-shadow: 0 24px 48px -30px rgba(0, 0, 0, 0.9);
    transition: max-height 0.36s var(--ease), opacity 0.24s var(--ease), padding 0.3s var(--ease), visibility 0.24s linear;
  }

  .site-header__nav-zone[data-open="true"] {
    max-height: min(76vh, 560px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding: 0.85rem var(--gutter) 1.35rem;
  }

  .primary-nav {
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.2rem;
  }

  .primary-nav::-webkit-scrollbar { display: none; }

  .primary-nav__list {
    width: max-content;
    gap: 0.5rem;
    padding-block: 0.15rem;
  }

  .primary-nav a {
    padding: 0.52rem 0.95rem;
    font-size: 0.83rem;
    color: var(--mist);
    border: 1px solid var(--glass-line);
    border-radius: 999px;
    background: rgba(18, 59, 48, 0.6);
  }

  .primary-nav a::before { display: none; }
  .primary-nav a::after { display: none; }

  .primary-nav a:hover { color: var(--warm-white); border-color: rgba(46, 242, 208, 0.5); }

  .primary-nav a[aria-current="page"] {
    color: var(--warm-white);
    border-color: var(--orange-volt);
    background: rgba(255, 122, 26, 0.18);
  }

  .header-actions {
    margin-top: 1rem;
    padding-left: 0;
    border-left: 0;
    padding-top: 0.9rem;
    border-top: 1px solid var(--glass-line);
  }

  .header-actions .btn { flex: 1 1 0; }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem 1rem; }
}

@media (max-width: 860px) {
  :root { --header-h: 66px; }

  .span-3, .span-4 { grid-column: span 6; }
  .span-5, .span-7, .span-8 { grid-column: span 12; }

  .footer-contact { flex-direction: column; align-items: flex-start; }
  .footer-contact__note { flex: 1 1 auto; }
}

@media (max-width: 700px) {
  .span-3, .span-4, .span-6 { grid-column: span 12; }

  .brand-mark__sub { display: none; }

  .tag-float { font-size: 0.68rem; padding: 0.28rem 0.58rem; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-meta { justify-content: flex-start; }
}

@media (max-width: 440px) {
  .tag-float { display: none; }

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

  .btn { padding: 0.62rem 1rem; font-size: 0.82rem; }
}

/* ---------- 16. Motion / contrast preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .scroll-progress { display: none; }

  .btn--volt:hover,
  .tag-float:hover { transform: none; }
}

@media (prefers-contrast: more) {
  :root { --mist: #CFE3DC; --glass-line: rgba(244, 240, 230, 0.4); }
}