/* ==========================================================================
   亚投代理中心 — 共享站点样式 /assets/site.css
   坐标门户：深靛蓝底 + 铜金路径 + 翡翠状态点 + 切角与斜线
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 8rem;
}

body {
  margin: 0;
  background: var(--mist);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, dt { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
input { font: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --indigo: #081A3A;
  --indigo-mid: #112B5C;
  --gold: #D6A15A;
  --copper: #B77A35;
  --jade: #1E9E7A;
  --mist: #F5F7FB;
  --sand: #E7E1D6;
  --graphite: #1D2635;
  --sky: #7FB8E8;
  --gold-soft: #F0C987;

  --line-dark: rgba(214, 161, 90, 0.28);
  --line-light: rgba(8, 26, 58, 0.12);

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

  --fs-body: clamp(1rem, 0.96rem + 0.18vw, 1.09rem);
  --fs-small: 0.86rem;
  --fs-note: 0.74rem;

  --page-max: 1440px;
  --gutter: clamp(1rem, 4vw, 3rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 240ms;
  --dur-slow: 720ms;
}

/* ---------- 3. Typography ---------- */
:where(h1, h2, h3, h4, h5, h6) {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: inherit;
  text-wrap: balance;
}

p { text-wrap: pretty; }

::selection { background: rgba(214, 161, 90, 0.32); color: var(--indigo); }

/* ---------- 4. Focus & accessibility ---------- */
:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-header :focus-visible,
.site-footer :focus-visible { outline-color: var(--gold-soft); }

.sr-only {
  position: absolute;
  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;
}

.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  z-index: 300;
  display: inline-block;
  padding: 0.7rem 1.2rem;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--indigo);
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 1rem; }

/* ---------- 5. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  isolation: isolate;
  color: var(--mist);
  background: linear-gradient(180deg, #0A2148 0%, #081A3A 82%);
  border-bottom: 1px solid var(--line-dark);
}

.site-header__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(70% 150% at 8% -40%, rgba(127, 184, 232, 0.26), transparent 62%),
    radial-gradient(58% 130% at 96% -20%, rgba(214, 161, 90, 0.24), transparent 64%),
    repeating-linear-gradient(118deg, rgba(214, 161, 90, 0.06) 0 1px, transparent 1px 30px);
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(0.5rem, 1vw, 0.9rem);
  max-width: var(--page-max);
  margin-inline: auto;
  padding: clamp(0.75rem, 1.5vw, 1.1rem) var(--gutter) clamp(0.6rem, 1.2vw, 0.9rem);
}

.site-header__brandrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  min-height: 44px;
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--mist);
}

.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  background: linear-gradient(140deg, var(--gold-soft), var(--gold) 55%, var(--copper));
  clip-path: polygon(0 0, 100% 0, 100% 64%, 64% 100%, 0 100%);
  transition: transform var(--dur) var(--ease);
}

.brand__mark::before {
  content: "";
  width: 13px;
  height: 13px;
  border: 1.5px solid rgba(8, 26, 58, 0.85);
  transform: rotate(45deg);
}

.brand:hover .brand__mark { transform: translateY(-1px) rotate(-2deg); }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.16rem;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.1;
}

.brand__line {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1.2;
  color: rgba(214, 161, 90, 0.9);
}

.brand--footer .brand__name { font-size: 1.06rem; }

/* coordinate readout */
.site-coord {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: rgba(245, 247, 251, 0.55);
}

.site-coord__item { line-height: 1.2; }

.site-coord__sep {
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, rgba(214, 161, 90, 0.85), transparent);
}

/* tools */
.site-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.site-search {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.site-search__label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  color: rgba(245, 247, 251, 0.55);
}

.site-search__field {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0 0.3rem 0 0.1rem;
  border: 1px solid rgba(214, 161, 90, 0.38);
  background: rgba(6, 20, 44, 0.62);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.site-search__field:focus-within {
  border-color: var(--gold);
  background: rgba(10, 30, 64, 0.92);
}

.site-search__input {
  width: clamp(168px, 20vw, 270px);
  min-width: 0;
  padding: 0.5rem 0.3rem 0.5rem 0.7rem;
  border: 0;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 0.84rem;
  line-height: 1.4;
  appearance: none;
  -webkit-appearance: none;
}

.site-search__input:focus { outline: none; }

.site-search__input::-webkit-search-cancel-button { -webkit-appearance: none; }

.site-search__input::placeholder { color: rgba(245, 247, 251, 0.42); }

.site-search__key {
  flex: none;
  padding: 0 0.32rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  color: rgba(245, 247, 251, 0.4);
  border: 1px solid rgba(245, 247, 251, 0.18);
  border-radius: 3px;
}

.site-search__status {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  line-height: 1.4;
  letter-spacing: 0.08em;
  color: rgba(245, 247, 251, 0.5);
}

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  background: rgba(214, 161, 90, 0.1);
  border: 1px solid rgba(214, 161, 90, 0.45);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(2.75px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-2.75px) rotate(-45deg); }

/* nav */
.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem 1.5rem;
  padding-top: clamp(0.45rem, 0.9vw, 0.7rem);
  border-top: 1px solid rgba(245, 247, 251, 0.1);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem clamp(1rem, 2.4vw, 2.2rem);
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 0.4rem 0;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: rgba(245, 247, 251, 0.78);
  transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(214, 161, 90, 0));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible { color: var(--gold-soft); }

.site-nav__list a:hover::after,
.site-nav__list a:focus-visible::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] { color: var(--gold); }

.site-nav__list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--gold), var(--jade));
}

.site-nav__list a.is-match { color: var(--gold-soft); }

.site-nav__list a.is-match::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--jade), var(--gold));
}

.site-nav__list a.is-muted { opacity: 0.34; }

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

/* progress */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 2;
  height: 2px;
  background: rgba(245, 247, 251, 0.1);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--jade), var(--gold) 55%, var(--copper));
  transition: transform 120ms linear;
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.15rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  color: var(--indigo);
  background: linear-gradient(135deg, var(--gold-soft), var(--gold) 52%, var(--copper));
  border: 1px solid transparent;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), filter var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-1px); filter: brightness(1.08); }
.btn:active { transform: translateY(0); }

.btn--ghost {
  color: var(--gold);
  background: transparent;
  border-color: rgba(214, 161, 90, 0.55);
}

.btn--ghost:hover {
  color: var(--gold-soft);
  background: rgba(214, 161, 90, 0.14);
  filter: none;
}

/* ---------- 7. Layout & base components ---------- */
.wrap {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.2vw, 2rem);
}

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

.panel {
  position: relative;
  padding: clamp(1.25rem, 2.4vw, 2rem);
  color: var(--graphite);
  background: var(--mist);
  border: 1px solid var(--line-light);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.panel--dark {
  color: var(--mist);
  background: linear-gradient(155deg, #112B5C 0%, #081A3A 74%);
  border-color: rgba(214, 161, 90, 0.26);
}

.panel--sand {
  background: var(--sand);
  border-color: rgba(8, 26, 58, 0.1);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.panel--dark .eyebrow { color: var(--gold); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.tag {
  display: inline-block;
  padding: 0.28rem 0.62rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--copper);
  background: rgba(214, 161, 90, 0.1);
  border: 1px solid rgba(214, 161, 90, 0.45);
  clip-path: polygon(0 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
}

.tag--jade {
  color: #146E55;
  background: rgba(30, 158, 122, 0.12);
  border-color: rgba(30, 158, 122, 0.5);
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, rgba(214, 161, 90, 0.55), rgba(8, 26, 58, 0.08) 62%, transparent);
}

.panel--dark .rule {
  background: linear-gradient(90deg, rgba(214, 161, 90, 0.6), rgba(245, 247, 251, 0.08) 62%, transparent);
}

/* image container base — 页面阶段在内部放置 img 占位 */
.media-frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(150deg, #112B5C, #081A3A 58%, #0B2448);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(118deg, rgba(214, 161, 90, 0.14) 0 1px, transparent 1px 26px),
    radial-gradient(60% 70% at 76% 16%, rgba(127, 184, 232, 0.34), transparent 68%),
    radial-gradient(56% 66% at 16% 84%, rgba(30, 158, 122, 0.3), transparent 70%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(214, 161, 90, 0.22);
}

.media-frame > img,
.media-frame > video,
.media-frame > picture {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 0.8rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: rgba(245, 247, 251, 0.82);
  background: linear-gradient(0deg, rgba(6, 20, 44, 0.88), transparent);
}

/* breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: rgba(8, 26, 58, 0.55);
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(8, 26, 58, 0.3);
}

.breadcrumb a {
  text-decoration: none;
  color: inherit;
  transition: color var(--dur) var(--ease);
}

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

/* prose */
.prose {
  max-width: 68ch;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--graphite);
}

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

.prose h2 {
  margin-top: 2em;
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: clamp(1.15rem, 1.6vw, 1.35rem);
  font-weight: 700;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li + li { margin-top: 0.4em; }

.prose strong {
  font-weight: 600;
  color: var(--indigo);
}

.prose a {
  color: var(--copper);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.prose blockquote {
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 2px solid var(--gold);
  color: rgba(29, 38, 53, 0.82);
}

/* ---------- 8. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  color: var(--mist);
  background: linear-gradient(180deg, #081A3A 0%, #061530 100%);
  border-top: 1px solid var(--line-dark);
  padding-block: clamp(2.4rem, 5vw, 3.8rem) clamp(1.2rem, 2.4vw, 2rem);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(64% 90% at 10% -10%, rgba(127, 184, 232, 0.18), transparent 62%),
    radial-gradient(54% 80% at 92% 8%, rgba(214, 161, 90, 0.16), transparent 66%),
    repeating-linear-gradient(118deg, rgba(214, 161, 90, 0.05) 0 1px, transparent 1px 34px);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr;
  gap: clamp(1.6rem, 3.4vw, 3.2rem);
}

.footer-brand {
  display: grid;
  align-content: start;
  gap: 0.95rem;
}

.footer-brand__note {
  max-width: 34ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(245, 247, 251, 0.66);
}

.footer-nav__title,
.footer-contact__title {
  margin-bottom: 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-nav__list { display: grid; gap: 0.55rem; }

.footer-nav__list a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.92rem;
  text-decoration: none;
  color: rgba(245, 247, 251, 0.78);
  transition: color var(--dur) var(--ease);
}

.footer-nav__list a::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--copper);
  transition: width var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.footer-nav__list a:hover { color: var(--gold-soft); }

.footer-nav__list a:hover::before {
  width: 24px;
  background: var(--gold-soft);
}

.footer-contact__list { display: grid; gap: 0.8rem; }

.footer-contact__row { display: grid; gap: 0.12rem; }

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: rgba(245, 247, 251, 0.45);
}

.footer-contact__value {
  font-size: 0.92rem;
  line-height: 1.6;
  color: rgba(245, 247, 251, 0.86);
  overflow-wrap: anywhere;
}

.footer-note {
  max-width: 92ch;
  margin-top: clamp(1.4rem, 2.6vw, 2.2rem);
  padding-top: 1rem;
  border-top: 1px solid rgba(245, 247, 251, 0.1);
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(245, 247, 251, 0.55);
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(245, 247, 251, 0.5);
}

.footer-icp { color: rgba(214, 161, 90, 0.78); }

/* ---------- 9. Responsive ---------- */
@media (max-width: 1040px) {
  .site-coord { display: none; }
}

@media (max-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 3; }
  .col-7, .col-8 { grid-column: span 6; }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: clamp(1.5rem, 3vw, 2.4rem);
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-header__brandrow { row-gap: 0.6rem; }

  .site-tools {
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .site-search {
    flex: 1 1 220px;
    max-width: none;
  }

  .site-search__field { width: 100%; }
  .site-search__input { width: 100%; }
  .site-search__status { display: none; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem var(--gutter) 1.35rem;
    background: linear-gradient(180deg, #0A2148 0%, #081A3A 100%);
    border-top: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
    box-shadow: 0 26px 50px rgba(3, 10, 24, 0.6);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .site-nav[data-open] { display: flex; }

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

  .site-nav__list li + li { border-top: 1px solid rgba(245, 247, 251, 0.08); }

  .site-nav__list a {
    display: block;
    padding: 0.85rem 0.15rem;
    font-size: 1rem;
  }

  .site-nav__list a::after { display: none; }

  .site-nav__cta { margin: 1rem 0 0; }

  .site-nav__cta .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .grid-12 { grid-template-columns: 1fr; }

  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: 1 / -1; }

  .site-footer__grid { grid-template-columns: 1fr; }

  .site-footer__base {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}

@media (max-width: 420px) {
  .brand__line { letter-spacing: 0.14em; }
  .nav-toggle__text { display: none; }
}

/* ---------- 10. Reduced motion ---------- */
@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-progress__bar { transition: none; }
  .brand:hover .brand__mark { transform: none; }
  .btn:hover { transform: none; }
}