:root {
  --color-surface: #fbfbfb;
  --color-surface-alt: #f2f2f2;
  --color-surface-deep: #e5e6e6;
  --color-ink: #424b4d;
  --color-ink-soft: #647073;
  --color-ink-muted: #788587;
  --color-line: #dadbdc;
  --color-primary: #187f90;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #dbeaec;
  --color-accent: #d60ab5;
  --color-accent-ink: #ffffff;
  --color-highlight: #f4d0ee;
  --color-focus: #d100b0;
  --color-contrast-surface: #111e20;
  --color-contrast-ink: #e4e6e7;
  --color-contrast-line: #3f4a4c;
  --color-contrast-accent: #f30cce;
  --overlay-scrim: linear-gradient(180deg, rgba(17, 30, 32, 0.35) 0%, rgba(17, 30, 32, 0.72) 55%, rgba(17, 30, 32, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(51px, 10.5vw, 134px);
  --text-figure: clamp(42px, 7.5vw, 96px);
  --weight-heading: 788;
  --weight-body: 400;
  --leading-body: 1.76;
  --leading-heading: 1.28;
  --tracking-heading: -0.008em;
  --radius-sm: 8px;
  --radius-md: 17px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 2px;
  --shadow-1: 0 1px 0 rgba(66, 75, 77, 0.12);
  --shadow-2: 0 2px 0 rgba(66, 75, 77, 0.18);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1100px;
  --measure: 70ch;
  --gutter: 24px;
  --section-y: 82px;
  --section-y-lg: 115px;
}

/* ============ reset ============ */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

p { margin: 0 0 var(--space-2); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 var(--space-2); padding-left: 1.25em; }

a {
  color: var(--color-primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
a:hover { color: var(--color-accent); }

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

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

.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ============ skip link ============ */
.skip-link {
  position: fixed;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 200;
  padding: 10px 18px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  box-shadow: 4px 4px 0 var(--color-accent);
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}
.skip-link:focus {
  transform: translateY(0);
  color: var(--color-primary-ink);
}

/* ============ container / layout helpers ============ */
.wrap,
.header-frame,
.footer-frame {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.measure { max-width: var(--measure); }

.section { padding-block: var(--section-y); position: relative; }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--deep h1,
.section--deep h2,
.section--deep h3,
.section--deep h4 { color: var(--color-contrast-ink); }
.section--deep a { color: var(--color-contrast-accent); }
.section--deep .divider-thick,
.section--deep .divider-double { border-color: var(--color-contrast-line); }

.grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: var(--gutter);
}
.span-2 { grid-column: span 2; }
.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-9 { grid-column: span 9; }

.divider-thick {
  height: 0;
  border: 0;
  border-top: var(--border-thick) solid var(--color-ink);
  margin: var(--space-4) 0;
}
.divider-double {
  height: 8px;
  border: 0;
  border-top: var(--border-thick) solid var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-ink);
  margin: var(--space-4) 0;
}
.stripe {
  height: 14px;
  border-radius: var(--radius-pill);
  background:
    repeating-linear-gradient(135deg,
      var(--color-primary) 0 14px,
      var(--color-surface) 14px 28px,
      var(--color-accent) 28px 42px,
      var(--color-surface) 42px 56px);
  border: var(--border-thin) solid var(--color-contrast-surface);
}

/* ============ decorative shapes ============ */
.shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}
.shape-circle {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  border: var(--border-thin) solid var(--color-accent);
}
.shape-quarter {
  width: 112px;
  height: 112px;
  background: var(--color-primary-soft);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-lg) 0 var(--radius-lg) 0;
}
.shape-wedge {
  width: 132px;
  height: 62px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  clip-path: polygon(0 0, 100% 26%, 100% 100%, 0 74%);
}
.shape-dots {
  width: 108px;
  height: 62px;
  background-image: radial-gradient(var(--color-primary) 1.6px, transparent 1.7px);
  background-size: 12px 12px;
  opacity: 0.6;
}

/* ============ buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 18px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  line-height: 1.15;
  letter-spacing: 0.035em;
  text-decoration: none;
  color: var(--color-ink);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}
.btn:hover {
  color: var(--color-ink);
  background-color: var(--color-primary-soft);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--color-contrast-surface);
}
.btn:active {
  transform: translate(0, 0);
  box-shadow: none;
}
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: 3px 3px 0 var(--color-accent);
}
.btn-primary:hover {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: 5px 5px 0 var(--color-accent);
}
.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-contrast-surface);
  box-shadow: 3px 3px 0 var(--color-contrast-ink);
}
.btn-accent:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn-ghost {
  background-color: transparent;
}
.btn-ghost:hover {
  background-color: var(--color-primary-soft);
}

/* ============ tags / stats / headings ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-pill);
}
.tag-accent {
  color: var(--color-accent-ink);
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.eyebrow {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.section--deep .eyebrow { color: var(--color-contrast-accent); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-ink);
  margin-bottom: var(--space-4);
}
.section--deep .section-head { border-bottom-color: var(--color-contrast-line); }

.section-title {
  margin: 0;
  font-size: var(--text-2xl);
  letter-spacing: 0.02em;
}
.section-lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}
.section--deep .section-lede { color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent); }

.stat { display: block; }
.stat-figure {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}
.section--deep .stat-figure { color: var(--color-contrast-accent); }
.stat-label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.section--deep .stat-label { color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent); }

/* ============ breadcrumbs ============ */
.crumbs {
  padding-block: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  background-color: var(--color-surface-alt);
}
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}
.crumbs li { display: inline-flex; align-items: center; gap: var(--space-1); }
.crumbs li:not(:first-child)::before {
  content: "/";
  color: var(--color-ink-muted);
}
.crumbs a { color: var(--color-ink-soft); text-decoration: none; }
.crumbs a:hover { color: var(--color-accent); }
.crumbs [aria-current="page"] { color: var(--color-primary); font-weight: 700; }

/* ============ media frames ============ */
.media-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background-color: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-md);
  box-shadow: 6px 6px 0 var(--color-contrast-surface);
}
.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.media-frame > img + .media-caption,
.media-frame > picture + .media-caption {
  border-top: var(--border-thin) solid var(--color-contrast-surface);
}
.media-frame--portrait > img,
.media-frame--portrait > picture > img { aspect-ratio: 3 / 4; }
.media-frame--square > img,
.media-frame--square > picture > img { aspect-ratio: 1 / 1; }
.media-frame--wide > img,
.media-frame--wide > picture > img { aspect-ratio: 21 / 9; }

.media-caption {
  display: block;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-ink-soft);
  background-color: var(--color-surface);
}

.media-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  padding: var(--space-3);
  isolation: isolate;
}
.media-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--overlay-scrim);
}
.media-overlay,
.media-overlay .media-tag,
.media-overlay p,
.media-overlay h2,
.media-overlay h3 { color: var(--color-primary-ink); }
.media-overlay .media-tag {
  align-self: flex-start;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: var(--color-accent);
  border-radius: var(--radius-pill);
}

/* ============ data table ============ */
.table-scroll {
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.data-table th,
.data-table td {
  padding: 10px var(--space-2);
  text-align: left;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table thead th {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  border-bottom-color: var(--color-contrast-surface);
}
.data-table tbody tr:nth-child(even) { background-color: var(--color-surface-deep); }
.data-table th:first-child,
.data-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background-color: inherit;
  box-shadow: inset -2px 0 0 var(--color-line);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
}
.data-table thead th:first-child { background-color: var(--color-primary); }

/* ============ reveal ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}
[data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-contrast-surface);
}

.header-top {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 70px;
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--color-ink);
}
.brand:hover { color: var(--color-ink); }

.brand-badge {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.05;
  text-align: center;
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  box-shadow: 4px 4px 0 var(--color-accent);
  transform: rotate(-3deg);
}

.brand-words {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}
.brand-line {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-list li { display: flex; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 12px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
  line-height: 1.1;
  color: var(--color-ink);
  text-decoration: none;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.nav-link:hover {
  color: var(--color-ink);
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
}
.nav-link[aria-current="page"] {
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  border-color: var(--color-contrast-surface);
  box-shadow: 3px 3px 0 var(--color-contrast-surface);
}
.nav-link[aria-current="page"]:hover {
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
}
.nav-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.nav-link:hover .nav-index { color: var(--color-primary); }
.nav-link[aria-current="page"] .nav-index {
  color: var(--color-primary-ink);
  opacity: 0.78;
}

.header-cta { flex: 0 0 auto; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  padding: 9px 14px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  box-shadow: 3px 3px 0 var(--color-primary);
}
.nav-toggle[aria-expanded="true"] {
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  box-shadow: 3px 3px 0 var(--color-accent);
}
.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  background-color: currentColor;
  border-radius: var(--radius-pill);
}

/* header dark rail */
.header-rail {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.header-rail-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 48px;
  padding-block: 7px;
}

.age-rail {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}
.rail-label {
  margin-right: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}
.age-chip {
  padding: 4px 11px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--color-contrast-ink);
  background-color: transparent;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}
.age-chip:hover {
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}
.age-chip.is-active {
  color: var(--color-contrast-surface);
  background-color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.live-strip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1 1 auto;
  min-width: 0;
  margin-left: auto;
}
.live-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
  animation: livePulse 1.7s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.68); }
}

.live-viewport {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}
.live-track {
  display: flex;
  width: max-content;
  animation: liveTicker 46s linear infinite;
}
.live-viewport:hover .live-track,
.live-viewport:focus .live-track { animation-play-state: paused; }
@keyframes liveTicker {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-50%, 0, 0); }
}

.live-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0;
  padding: 0 var(--space-3) 0 0;
  list-style: none;
}
.live-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  transition: color 0.2s ease, opacity 0.2s ease;
}
.live-age {
  color: color-mix(in srgb, var(--color-contrast-ink) 48%, transparent);
}
.live-score {
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-contrast-ink);
  background-color: var(--color-contrast-line);
}
.live-item.is-dim { opacity: 0.34; }
.live-item.is-focus { color: var(--color-contrast-accent); }
.live-item.is-focus .live-score {
  color: var(--color-contrast-surface);
  background-color: var(--color-contrast-accent);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  display: block;
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  z-index: 3;
}

/* ============ FOOTER ============ */
.site-footer {
  margin-top: var(--section-y-lg);
  border-top: var(--border-thick) solid var(--color-contrast-surface);
}

.footer-upper {
  position: relative;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.footer-upper::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -50px;
  width: 210px;
  height: 210px;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: 50%;
  pointer-events: none;
}
.footer-upper::after {
  content: "";
  position: absolute;
  left: 38%;
  bottom: -14px;
  width: 136px;
  height: 40px;
  background-color: var(--color-contrast-accent);
  opacity: 0.32;
  clip-path: polygon(0 40%, 100% 0, 100% 62%, 0 100%);
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-6) var(--gutter);
  padding-block: var(--space-6) var(--space-8);
}

.footer-col { min-width: 0; }

.footer-brand-name {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.03em;
  color: var(--color-contrast-ink);
}
.footer-brand-line {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}
.footer-brand-note {
  max-width: 34ch;
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}
.footer-cta { margin-top: var(--space-1); }

.footer-heading {
  margin: 0 0 var(--space-2);
  padding-bottom: 6px;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-list a {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.footer-list a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.footer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-chip {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  background-color: transparent;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
}

.footer-lower {
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
  border-top: var(--border-thick) solid var(--color-primary);
}
.footer-legal {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px var(--gutter);
  padding-block: var(--space-4) var(--space-6);
}
.legal-item {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}
.legal-key {
  flex: 0 0 auto;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary-ink);
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  align-self: flex-start;
}
.legal-links {
  grid-column: 1 / -1;
  gap: var(--space-1) var(--space-3);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}
.legal-links a {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
}
.legal-links a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.legal-copy {
  grid-column: 1 / -1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* ============ responsive ============ */
@media (max-width: 1080px) {
  .nav-link { padding: 9px 9px; font-size: var(--text-xs); }
  .nav-index { display: none; }
}

@media (max-width: 960px) {
  html { scroll-padding-top: 108px; }

  .site-header { position: sticky; }

  .header-top {
    flex-wrap: wrap;
    gap: var(--space-2);
    min-height: 62px;
  }
  .brand-badge { width: 40px; height: 40px; }

  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    margin-left: 0;
    padding: var(--space-2) var(--gutter) var(--space-3);
    background-color: var(--color-surface);
    border-bottom: var(--border-thick) solid var(--color-contrast-surface);
    box-shadow: 0 6px 0 rgba(17, 30, 32, 0.14);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .site-nav[data-open="true"] { display: block; }

  .nav-list { flex-direction: column; gap: 2px; }
  .nav-list li { display: block; }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 14px;
    font-size: var(--text-base);
  }
  .nav-index { display: inline; }

  .header-rail-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding-block: var(--space-2);
  }
  .age-rail { flex-wrap: wrap; }
  .live-strip { margin-left: 0; }
  .live-viewport { width: 100%; }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--gutter);
    padding-block: var(--space-4) var(--space-6);
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand-note { max-width: none; }

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

  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-2, .span-3 { grid-column: span 3; }
  .span-4, .span-5 { grid-column: span 6; }
  .span-6 { grid-column: span 6; }
  .span-7, .span-8, .span-9 { grid-column: span 6; }
}

@media (max-width: 620px) {
  :root { --section-y: 56px; --section-y-lg: 72px; }

  .brand-name { font-size: var(--text-sm); }
  .brand-line { font-size: 11px; letter-spacing: 0.06em; }

  .section-title { font-size: var(--text-xl); }

  .grid { grid-template-columns: 1fr; gap: var(--space-3); }
  .span-2, .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9 {
    grid-column: span 1;
  }

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

  .media-frame { box-shadow: 4px 4px 0 var(--color-contrast-surface); }

  .shape-circle, .shape-quarter { width: 76px; height: 76px; }
}

/* ============ motion & motion 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;
  }

  .live-track {
    animation: none !important;
    transform: none !important;
  }
  .live-viewport {
    overflow-x: auto;
    scrollbar-width: thin;
  }
  .live-dot { animation: none !important; opacity: 1; }

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

  .btn:hover { transform: none; }
  .skip-link { transition: none; }
}