/* ==========================================================
   云开赛场 YUNKAI ARENA — /assets/site.css
   共享样式：技术蓝图 / 命令栏导航 / 珠宝色分区 / 数据组件
   ========================================================== */

/* ---------- 1. Reset & Variables ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0A192F;
  --color-bg-deep: #020617;
  --color-text: #CCD6F6;
  --color-heading: #FFFFFF;
  --color-accent: #FF6B35;
  --color-cyan: #63B3ED;
  --color-wine: #9B2C2C;
  --color-indigo: #5A67D8;
  --color-gold: #D69E2E;
  --color-border: #334155;

  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: Georgia, "Times New Roman", serif;
  --font-data: "Courier New", monospace;

  --header-h: 68px;
  --container-w: 1280px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --shadow-sm: 0 1px 0 rgba(255,255,255,0.04), 0 2px 12px rgba(0,0,0,0.28);
  --shadow-md: 0 2px 4px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.35);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center top;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 520px at 82% -8%, rgba(99,179,237,0.08), transparent 62%),
    radial-gradient(900px 420px at 2% 108%, rgba(255,107,53,0.07), transparent 60%);
}

#main-content {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  width: 100%;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

#main-content:focus {
  outline: none;
}

/* ---------- 2. Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-heading);
  margin-bottom: 0.45em;
}

h1 { font-size: clamp(2.25rem, 5vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.0625rem; }

p { margin-bottom: 1em; }
ul, ol { padding-left: 1.25em; margin-bottom: 1em; }
li { margin-bottom: 0.25em; }

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
a:hover { color: var(--color-accent); }

strong, b { color: var(--color-heading); }
em { color: var(--color-heading); }

::selection {
  background: rgba(255,107,53,0.35);
  color: #FFFFFF;
}

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

/* ---------- 3. Accessibility ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9900;
  transform: translateY(-130%);
  background: var(--color-accent);
  color: var(--color-bg-deep);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 10px 20px;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: transform 0.3s var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
  color: var(--color-bg-deep);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background 0.25s var(--ease),
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}
.btn:hover { text-decoration: none; }

.btn--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-deep);
}
.btn--accent::after {
  content: "\2197";
  font-size: 0.875em;
  line-height: 1;
}
.btn--accent:hover {
  background: transparent;
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-cyan);
}
.btn--outline:hover {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  box-shadow: 0 0 0 1px rgba(99,179,237,0.35), 0 0 16px rgba(99,179,237,0.08);
}

/* ---------- 5. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,25,47,0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 148px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent 90%);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 100%, 0 100%);
  z-index: 2;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--header-h);
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
}

.site-header__inner::before,
.site-header__inner::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  opacity: 0.5;
  pointer-events: none;
}
.site-header__inner::before {
  top: 6px;
  left: 6px;
  border-top: 2px solid var(--color-accent);
  border-left: 2px solid var(--color-accent);
}
.site-header__inner::after {
  right: 6px;
  bottom: 6px;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  will-change: width;
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand:hover .brand__mark { border-color: var(--color-cyan); }

.brand__mark {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  width: 36px;
  height: 24px;
  border: 2px solid var(--color-accent);
  border-radius: 55% 45% 38% 62% / 58% 52% 48% 42%;
  transform: rotate(-4deg);
  transition: border-color 0.3s var(--ease);
}
.brand__mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 0;
  border-left: 1px dashed var(--color-cyan);
  transform: translateX(-50%);
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  top: 50%;
  height: 0;
  border-top: 1px dashed var(--color-cyan);
}

.brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand__name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-heading);
}
.brand__sub {
  margin-top: 3px;
  font-family: var(--font-data);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  text-transform: uppercase;
  white-space: nowrap;
}

/* command bar status */
.header-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-data);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-cyan);
  user-select: none;
}
.header-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(255,107,53,0.7);
  animation: status-pulse 2s var(--ease) infinite;
}
.header-status__text { line-height: 1.2; }

@keyframes status-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.65); }
}

/* navigation */
.primary-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.primary-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-family: var(--font-heading);
  font-size: 0.8625rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition:
    color 0.2s var(--ease),
    background 0.2s var(--ease),
    border-color 0.2s var(--ease);
}
.primary-nav a::before {
  content: attr(data-index);
  font-family: var(--font-data);
  font-size: 0.5625rem;
  font-weight: 400;
  color: var(--color-wine);
  letter-spacing: 0.03em;
  transition: color 0.2s var(--ease);
}
.primary-nav a:hover {
  color: var(--color-heading);
  background: rgba(99,179,237,0.06);
  border-color: rgba(99,179,237,0.25);
}
.primary-nav a[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(255,107,53,0.08);
  border-color: rgba(255,107,53,0.35);
}
.primary-nav a[aria-current="page"]::before {
  color: var(--color-accent);
}
.primary-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 3px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* header CTA */
.nav-cta {
  flex-shrink: 0;
  margin-left: 4px;
  padding: 8px 14px;
  font-size: 0.8125rem;
}

/* mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.nav-toggle:hover {
  border-color: var(--color-accent);
  background: rgba(255,107,53,0.06);
}
.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition:
    transform 0.3s var(--ease),
    opacity 0.3s var(--ease),
    background 0.3s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
  background: var(--color-accent);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  background: var(--color-accent);
}

/* ---------- 6. Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: auto;
  background: var(--color-bg-deep);
  border-top: 1px solid var(--color-border);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 220px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-indigo), var(--color-gold));
  z-index: 2;
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1.2fr;
  gap: 48px;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 32px 40px;
}
.site-footer__brand .brand { margin-bottom: 22px; }
.site-footer__trust {
  max-width: 360px;
  margin-bottom: 16px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-text);
}
.site-footer__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
}
.site-footer__addr {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: rgba(204,214,246,0.55);
}

.site-footer__heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding-bottom: 8px;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-cyan);
  border-bottom: 1px solid var(--color-border);
}
.site-footer__heading::after {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--color-accent);
}

.site-footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer__nav li { margin: 0; }
.site-footer__nav a {
  display: inline-block;
  padding: 4px 0;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  color: var(--color-text);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-bottom-color 0.2s var(--ease);
}
.site-footer__nav a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.site-footer__contact {
  margin-top: 22px;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--color-cyan);
  word-break: break-all;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 32px;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 16px 32px 20px;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: rgba(204,214,246,0.5);
}
.site-footer__legal p { margin: 0; }
.site-footer__lang {
  display: inline-block;
  padding: 2px 10px;
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  border: 1px solid rgba(214,158,46,0.4);
  border-radius: var(--radius-sm);
  background: rgba(214,158,46,0.06);
}

/* back to top */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 950;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 48px;
  min-height: 48px;
  padding: 6px 8px;
  background: rgba(10,25,47,0.94);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-cyan);
  font-family: var(--font-heading);
  font-size: 0.5625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition:
    opacity 0.3s var(--ease),
    transform 0.3s var(--ease),
    border-color 0.25s var(--ease),
    color 0.25s var(--ease),
    background 0.25s var(--ease);
}
.back-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-top:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(10,25,47,0.95);
}
.back-top__icon {
  display: block;
  font-size: 0.9375rem;
  line-height: 1;
}
.back-top__text {
  display: block;
  line-height: 1;
  letter-spacing: inherit;
}

/* ---------- 7. Layout Utilities ---------- */
.content-container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
}

.section-pad {
  padding: 88px 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 8. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
  max-width: var(--container-w);
  margin: 0 auto 28px;
  padding: 14px 32px;
  list-style: none;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.breadcrumb li + li::before {
  content: "\2044";
  font-family: var(--font-data);
  color: var(--color-border);
}
.breadcrumb a { color: var(--color-cyan); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb [aria-current="page"] {
  color: var(--color-accent);
  font-weight: 700;
}

/* ---------- 9. Components ---------- */
.section-index {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-left: 14px;
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-cyan);
}
.section-index::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  transform: translateY(-50%);
}

.panel {
  position: relative;
  padding: 28px;
  background: rgba(2,6,23,0.35);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--color-accent);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-md) 0 0 0;
  pointer-events: none;
}
.panel__title {
  margin-bottom: 10px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-heading);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: rgba(51,65,85,0.25);
  color: var(--color-text);
  line-height: 1.2;
}
.tag--gold {
  color: var(--color-gold);
  border-color: rgba(214,158,46,0.4);
  background: rgba(214,158,46,0.07);
}
.tag--indigo {
  color: var(--color-indigo);
  border-color: rgba(90,103,216,0.45);
  background: rgba(90,103,216,0.08);
}
.tag--wine {
  color: #E18A8A;
  border-color: rgba(155,44,44,0.5);
  background: rgba(155,44,44,0.12);
}

.data-number {
  font-family: var(--font-data);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.hr {
  height: 1px;
  margin: 40px 0;
  border: none;
  background: linear-gradient(90deg, var(--color-border), transparent);
}

/* media frame */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: rgba(2,6,23,0.6);
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 32px 32px;
}
.media-frame::after {
  content: "";
  display: block;
  padding-bottom: 56.25%;
}
.media-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s var(--ease);
}
.media-frame:hover > img {
  transform: scale(1.03);
}
.media-frame--portrait::after { padding-bottom: 125%; }
.media-frame--square::after { padding-bottom: 100%; }
.media-frame--hero::after { padding-bottom: 60%; }

/* diagonal cuts */
.cut-accent {
  position: relative;
}
.cut-accent::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 26px solid var(--color-accent);
  border-left: 26px solid transparent;
}
.cut-cyan {
  position: relative;
}
.cut-cyan::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0;
  border-bottom: 22px solid var(--color-cyan);
  border-right: 22px solid transparent;
}

/* scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 10. Responsive ---------- */
@media (max-width: 1100px) {
  .primary-nav a {
    padding: 8px 8px;
    font-size: 0.8125rem;
    gap: 4px;
  }
  .primary-nav a::before {
    display: none;
  }
  .site-footer__grid {
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 1000px) {
  .header-status {
    display: none;
  }
  .nav-cta {
    margin-left: 0;
  }
}

@media (max-width: 920px) {
  :root {
    --header-h: 60px;
  }
  .site-header__inner {
    gap: 10px;
    padding: 0 18px;
  }
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    padding: 14px 18px 18px;
    background: rgba(2,6,23,0.97);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  .primary-nav[data-open] {
    display: flex;
  }
  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .primary-nav a {
    display: flex;
    gap: 12px;
    padding: 13px 10px;
    font-size: 0.9375rem;
    border-radius: 0;
    border-bottom: 1px solid rgba(51,65,85,0.5);
  }
  .primary-nav li:last-child a {
    border-bottom: none;
  }
  .primary-nav a::before {
    display: inline-block;
    font-size: 0.625rem;
  }
  .primary-nav a[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 10px;
    bottom: 10px;
    width: 3px;
    height: auto;
    border-radius: 0 2px 2px 0;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 48px 24px 32px;
  }
  .site-footer__legal {
    padding: 16px 24px 20px;
  }
  .section-pad {
    padding: 56px 0;
  }
}

@media (max-width: 560px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .content-container {
    padding: 0 18px;
  }
  .site-header__inner {
    padding: 0 14px;
  }
  .brand {
    gap: 8px;
  }
  .brand__mark {
    width: 30px;
    height: 20px;
  }
  .brand__name {
    font-size: 1rem;
  }
  .brand__sub {
    display: none;
  }
  .nav-cta {
    padding: 7px 10px;
    font-size: 0.75rem;
  }
  .back-top {
    right: 16px;
    bottom: 16px;
  }
}

/* ---------- 11. 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;
  }
  .header-status__dot {
    animation: none;
  }
  .scroll-progress {
    display: none;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .media-frame img {
    transition: none;
  }
  .back-top {
    transition: none;
  }
}