/* ==========================================================================
   site.css — 币游平台主页 共享外壳与基础组件
   深海墨蓝基底 / 霓虹青主亮色 / 珊瑚橙行动色 / 香槟金细节
   ========================================================================== */

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

* { margin: 0; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

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

button,
input,
select,
textarea { font: inherit; color: inherit; }

button { background: none; border: 0; }

/* ---------- 2. Design tokens ---------- */
:root {
  --ink-950: #061421;
  --ink-900: #0A2233;
  --ink-800: #10364A;
  --ink-700: #164659;

  --glass: rgba(25, 230, 255, 0.08);
  --glass-2: rgba(25, 230, 255, 0.14);

  --cyan: #19E6FF;
  --cyan-soft: rgba(25, 230, 255, 0.45);
  --cyan-ghost: rgba(25, 230, 255, 0.10);

  --coral: #FF6B4A;
  --coral-soft: rgba(255, 107, 74, 0.45);

  --gold: #D8B56A;
  --gold-soft: rgba(216, 181, 106, 0.45);

  --mint: #46E6A1;

  --paper: #EAF7FF;
  --mist: #9DB8C8;

  --line: rgba(157, 184, 200, 0.18);
  --line-strong: rgba(157, 184, 200, 0.30);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --shell: min(1320px, calc(100% - clamp(1.25rem, 4vw, 3rem)));

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --ease: cubic-bezier(0.32, 0.72, 0.28, 1);
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.005em;
  background-color: var(--ink-950);
  background-image:
    linear-gradient(rgba(25, 230, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 230, 255, 0.032) 1px, transparent 1px),
    radial-gradient(1180px 620px at 4% -8%, rgba(25, 230, 255, 0.11), transparent 62%),
    radial-gradient(920px 520px at 100% 0%, rgba(216, 181, 106, 0.075), transparent 60%),
    radial-gradient(760px 600px at 50% 118%, rgba(255, 107, 74, 0.06), transparent 64%),
    linear-gradient(180deg, #071726 0%, #061421 46%, #04101a 100%);
  background-size: 72px 72px, 72px 72px, auto, auto, auto, auto;
  background-position: center top, center top, 0 0, 0 0, 0 0, 0 0;
  background-repeat: repeat, repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: var(--cyan);
  color: #04121c;
}

/* ---------- 4. Typography ---------- */
h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4.2vw, 4.2rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.4rem); }
h3 { font-size: clamp(1.125rem, 1.7vw, 1.4rem); font-weight: 800; letter-spacing: -0.01em; }
h4 { font-size: 1rem; font-weight: 800; letter-spacing: 0; }

p,
li { text-wrap: pretty; }

small { font-size: 0.8125rem; }

strong { font-weight: 700; color: #FFFFFF; }

a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }

hr { border: 0; }

/* ---------- 5. Focus & motion ---------- */
:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 5px;
}

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
}

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

/* ---------- 6. Layout utilities ---------- */
.container {
  width: var(--shell);
  margin-inline: auto;
}

.stack {
  display: grid;
  gap: clamp(0.75rem, 1.6vw, 1.25rem);
  align-content: start;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
  align-items: start;
}

.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: minmax(0, 5fr) minmax(0, 7fr); }

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

/* ---------- 7. Prose ---------- */
.prose {
  max-width: 42em;
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 { margin-top: 1.9em; }
.prose h3 { margin-top: 1.5em; }

.prose ul,
.prose ol {
  padding-left: 1.15em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

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

.prose a {
  color: var(--cyan);
  text-decoration: underline;
}

.prose a:hover { color: #7DF3FF; }

.prose blockquote {
  border-left: 2px solid var(--cyan-soft);
  padding-left: 1rem;
  color: var(--mist);
}

/* ---------- 8. Header ---------- */
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.7rem 1.15rem;
  border-radius: 10px;
  background: var(--cyan);
  color: #04121c;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(6, 20, 33, 0.97) 0%, rgba(8, 26, 42, 0.92) 100%);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
}

.command-bar {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(0.75rem, 1.8vw, 1.6rem);
  min-height: 62px;
  padding-block: 0.5rem;
}

/* Brand */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  color: var(--paper);
  text-decoration: none;
}

.brand-mark__glyph {
  position: relative;
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  border: 1px solid var(--cyan-soft);
  background: linear-gradient(145deg, rgba(25, 230, 255, 0.22), rgba(216, 181, 106, 0.14));
  box-shadow: inset 0 0 12px rgba(25, 230, 255, 0.16);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.brand-mark__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(25, 230, 255, 0.18), 0 0 14px rgba(25, 230, 255, 0.7);
}

.brand-mark__text {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
  line-height: 1.15;
}

.brand-mark__name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-mark__line {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--mist);
  white-space: nowrap;
}

.brand-mark:hover .brand-mark__glyph,
.brand-mark:focus-visible .brand-mark__glyph {
  border-color: var(--cyan);
  box-shadow: inset 0 0 16px rgba(25, 230, 255, 0.3), 0 0 0 3px rgba(25, 230, 255, 0.1);
}

.brand-mark--footer .brand-mark__glyph { width: 38px; height: 38px; }
.brand-mark--footer .brand-mark__name { font-size: 1.0625rem; }

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(25, 230, 255, 0.07);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan-soft);
  background: rgba(25, 230, 255, 0.13);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle__bars span:nth-child(2) { width: 70%; }

.site-header[data-open="true"] .nav-toggle {
  border-color: var(--cyan);
  color: var(--cyan);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Primary nav */
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.1rem, 0.7vw, 0.5rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  color: var(--mist);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-link::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: none;
  border-radius: 50%;
  background: currentColor;
  opacity: 0;
  transition: opacity 0.18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  bottom: 0.12rem;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.18s var(--ease);
}

.nav-link:hover {
  color: var(--paper);
  background: rgba(25, 230, 255, 0.07);
}

.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(25, 230, 255, 0.09);
}

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

/* Quick rail */
.quick-rail {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
  min-width: 0;
}

.quick-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.05rem;
  min-width: 0;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(25, 230, 255, 0.06);
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.quick-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-soft);
  background: rgba(25, 230, 255, 0.13);
}

.quick-card__label {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.quick-card__hint {
  font-size: 0.6875rem;
  line-height: 1.4;
  color: var(--mist);
  white-space: nowrap;
}

.quick-card--accent {
  border-color: var(--coral);
  background: var(--coral);
  color: #061421;
}

.quick-card--accent .quick-card__hint { color: rgba(6, 20, 33, 0.72); }

.quick-card--accent:hover {
  border-color: #FF8163;
  background: #FF8163;
}

.quick-card--accent:hover .quick-card__hint { color: rgba(6, 20, 33, 0.82); }

/* Progress rail */
.progress-rail {
  height: 2px;
  background: rgba(157, 184, 200, 0.14);
  overflow: hidden;
}

.progress-rail__fill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--gold) 62%, var(--coral) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
}

/* ---------- 9. Footer ---------- */
.site-footer {
  margin-top: clamp(2.5rem, 6vw, 5rem);
  padding-top: clamp(2rem, 4.5vw, 3.25rem);
  border-top: 1px solid var(--line-strong);
  color: var(--paper);
  background:
    radial-gradient(760px 260px at 6% 0%, rgba(25, 230, 255, 0.10), transparent 62%),
    radial-gradient(680px 240px at 96% 4%, rgba(216, 181, 106, 0.08), transparent 62%),
    linear-gradient(180deg, #08192A 0%, #061421 78%);
}

.footer-inner {
  width: var(--shell);
  margin-inline: auto;
}

.footer-masthead {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-bottom: clamp(1.5rem, 3.5vw, 2.5rem);
  border-bottom: 1px solid var(--line);
}

.footer-brand {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.footer-brand__summary {
  max-width: 34ch;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.footer-col__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-col__list {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--mist);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--cyan);
  transition: width 0.18s var(--ease);
}

.footer-link:hover { color: var(--cyan); }
.footer-link:hover::before { width: 14px; }

.footer-contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem clamp(1rem, 3vw, 2.5rem);
  padding-block: clamp(1.25rem, 3vw, 1.75rem);
  border-bottom: 1px solid var(--line);
}

.footer-contact__item {
  display: grid;
  gap: 0.3rem;
  min-width: 0;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-contact__value {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.75rem;
  padding-block: 1.1rem clamp(1.25rem, 2.8vw, 1.9rem);
  font-size: 0.8125rem;
  color: var(--mist);
}

.footer-legal__line {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* ---------- 10. Buttons ---------- */
.btn {
  --btn-bg: rgba(25, 230, 255, 0.10);
  --btn-fg: var(--paper);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.72rem 1.25rem;
  border: 1px solid var(--btn-bd);
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease),
              color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  --btn-bg: var(--coral);
  --btn-fg: #061421;
  --btn-bd: var(--coral);
}

.btn--primary:hover {
  --btn-bg: #FF8163;
  --btn-bd: #FF8163;
}

.btn--cyan {
  --btn-bg: var(--cyan);
  --btn-fg: #04121c;
  --btn-bd: var(--cyan);
}

.btn--cyan:hover {
  --btn-bg: #68F0FF;
  --btn-bd: #68F0FF;
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--paper);
  --btn-bd: var(--line-strong);
}

.btn--ghost:hover {
  --btn-bg: rgba(25, 230, 255, 0.09);
  --btn-bd: var(--cyan-soft);
  --btn-fg: var(--cyan);
}

/* ---------- 11. Small components ---------- */
.panel {
  padding: clamp(1.1rem, 2.5vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-900);
}

.panel--glass {
  background: var(--glass);
  border-color: rgba(25, 230, 255, 0.18);
  -webkit-backdrop-filter: blur(12px) saturate(125%);
  backdrop-filter: blur(12px) saturate(125%);
}

.panel--glass:hover {
  background: var(--glass-2);
  border-color: var(--cyan-soft);
}

.section-head {
  display: grid;
  gap: 0.5rem;
}

.section-head--row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  flex: none;
}

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

.index-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(25, 230, 255, 0.06);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.tag--cyan { color: var(--cyan); border-color: var(--cyan-soft); }
.tag--coral { color: var(--coral); border-color: var(--coral-soft); }
.tag--gold { color: var(--gold); border-color: var(--gold-soft); }

.status-dot {
  display: inline-block;
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(70, 230, 161, 0.16);
}

.status-dot--cyan {
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(25, 230, 255, 0.16);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: rgba(157, 184, 200, 0.45);
}

.breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

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

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

/* ---------- 12. Media frames (image containers for page stage) ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 12% 4%, rgba(25, 230, 255, 0.16), transparent 62%),
    radial-gradient(90% 80% at 92% 96%, rgba(216, 181, 106, 0.12), transparent 60%),
    linear-gradient(150deg, var(--ink-800) 0%, var(--ink-950) 100%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(25, 230, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 230, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
  opacity: 0.5;
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: linear-gradient(180deg, transparent, rgba(6, 20, 33, 0.88));
}

/* ---------- 13. Responsive ---------- */
@media (max-width: 1100px) {
  .command-bar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "quick quick"
      "nav nav";
    gap: 0.55rem 1rem;
    min-height: 0;
    padding-block: 0.7rem 0.75rem;
  }

  .brand-mark { grid-area: brand; }
  .nav-toggle { grid-area: toggle; display: inline-flex; }
  .quick-rail { grid-area: quick; }

  .primary-nav {
    grid-area: nav;
    display: none;
    width: 100%;
  }

  .site-header[data-open="true"] .primary-nav {
    display: block;
    animation: nav-drop 0.2s var(--ease);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.1rem;
    padding-top: 0.55rem;
    border-top: 1px solid var(--line);
  }

  .nav-link {
    padding: 0.6rem 0.5rem;
    font-size: 0.9375rem;
    border-radius: 6px;
  }

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

  .quick-rail {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .quick-card { padding: 0.45rem 0.65rem; }

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

@keyframes nav-drop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .footer-masthead { grid-template-columns: 1fr; }
  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact__item--wide { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 560px) {
  body { font-size: 0.9688rem; }

  .brand-mark__line { display: none; }

  .quick-card__hint { display: none; }
  .quick-card { align-items: center; padding: 0.5rem 0.6rem; }
  .quick-card__label { font-size: 0.8125rem; }

  .footer-columns { grid-template-columns: 1fr 1fr; }
  .footer-contact { grid-template-columns: 1fr; }
  .footer-contact__item--wide { grid-column: auto; }
  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .btn { width: 100%; }
}

/* ---------- 14. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .progress-rail__fill { transition: none; }
}