:root {
  --color-surface: #f9f9f9;
  --color-surface-alt: #efefef;
  --color-surface-deep: #e1e1e1;
  --color-ink: #2d3134;
  --color-ink-soft: #596064;
  --color-ink-muted: #747c80;
  --color-line: #d4d5d6;
  --color-primary: #127cba;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #d9e8f0;
  --color-accent: #4e800a;
  --color-accent-ink: #ffffff;
  --color-highlight: #dae3ce;
  --color-focus: #497d03;
  --color-contrast-surface: #15242e;
  --color-contrast-ink: #e4e6e7;
  --color-contrast-line: #434f57;
  --color-contrast-accent: #90ed12;
  --overlay-scrim: linear-gradient(180deg, rgba(21, 36, 46, 0.35) 0%, rgba(21, 36, 46, 0.72) 55%, rgba(21, 36, 46, 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: 8.7px;
  --text-sm: 13.1px;
  --text-base: 16px;
  --text-lg: 24.0px;
  --text-xl: 36.0px;
  --text-2xl: 54.0px;
  --text-3xl: 81.0px;
  --text-4xl: 121.5px;
  --text-display: clamp(44px, 9.0vw, 115px);
  --text-figure: clamp(37px, 6.5vw, 83px);
  --weight-heading: 830;
  --weight-body: 400;
  --leading-body: 1.66;
  --leading-heading: 1.24;
  --tracking-heading: -0.002em;
  --radius-sm: 441px;
  --radius-md: 610px;
  --radius-lg: 778px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 3px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1200px;
  --measure: 66ch;
  --gutter: 16px;
  --section-y: 76px;
  --section-y-lg: 106px;
}

/* ============================================================
   1 · RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ============================================================
   2 · 中文排版基线
   ============================================================ */
body {
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); font-weight: var(--weight-heading); }
h3 { font-size: var(--text-lg); font-weight: 500; }
h4 { font-size: var(--text-base); font-weight: 830; letter-spacing: 0.05em; }
p { max-width: var(--measure); color: var(--color-ink-soft); }
strong { color: var(--color-ink); font-weight: 700; }
a { transition: color .16s ease, border-color .16s ease, background-color .16s ease; }

.label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.lead {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-ink-soft);
  max-width: 46ch;
}
.display {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.92;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.figure-xl {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.95;
  color: var(--color-ink);
}
.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { margin-top: var(--space-6); }
.prose h3 { margin-top: var(--space-4); }
.prose ul li {
  position: relative;
  padding-left: var(--space-3);
  color: var(--color-ink-soft);
}
.prose ul li + li { margin-top: var(--space-1); }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--color-primary);
}
.prose a {
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-primary);
}
.prose a:hover { color: var(--color-primary); }

/* ============================================================
   3 · 布局骨架
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); position: relative; }
.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--space-6); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }
.section--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.section--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.section--dark { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4,
.section--primary h1, .section--primary h2, .section--primary h3, .section--primary h4,
.section--accent h1, .section--accent h2, .section--accent h3, .section--accent h4 { color: inherit; }
.section--dark p, .section--primary p, .section--accent p { color: inherit; }
.section--dark strong, .section--primary strong, .section--accent strong { color: inherit; }
.section--dark .figure-xl, .section--primary .figure-xl, .section--accent .figure-xl,
.section--dark .display, .section--primary .display, .section--accent .display { color: inherit; }
.section--dark .label, .panel--dark .label, .media__overlay .label {
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, var(--color-contrast-surface));
}
.section--dark .stat__num { color: var(--color-contrast-ink); }
.section--dark .stat__label { color: color-mix(in srgb, var(--color-contrast-ink) 70%, var(--color-contrast-surface)); }

.grid {
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  gap: var(--gutter);
}
.grid--tight { gap: var(--space-1); }
.grid--roomy { gap: var(--space-4); }
.span-1 { grid-column: span 1; }
.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; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.push-2 { grid-column-start: 2; }
.push-4 { grid-column-start: 4; }

.offset-rule {
  display: block;
  height: var(--border-thick);
  width: 72px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.offset-rule--accent { background-color: var(--color-accent); width: 126px; }
.offset-rule--dark { background-color: var(--color-contrast-surface); width: 44px; }
.offset-rule--shift { margin-left: var(--space-8); }

.geo { position: absolute; pointer-events: none; z-index: 0; }
.geo--circle { border-radius: 50%; }
.geo--half-top { border-radius: var(--radius-pill) var(--radius-pill) 0 0; }
.geo--half-left { border-radius: var(--radius-pill) 0 0 var(--radius-pill); }
.geo--ring { border: var(--border-thick) solid var(--color-primary); background-color: transparent; }
.geo--primary { background-color: var(--color-primary); }
.geo--accent { background-color: var(--color-accent); }
.geo--dark { background-color: var(--color-contrast-surface); }
.geo--soft { background-color: var(--color-primary-soft); }
.geo--slash { width: var(--border-thick); height: 120px; transform: skewX(-16deg); background-color: var(--color-accent); }

/* ============================================================
   4 · 通用组件
   ============================================================ */
.skip-link {
  position: fixed;
  left: var(--space-2);
  top: var(--space-2);
  z-index: 300;
  transform: translateY(-200%);
  padding: 10px var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}
.skip-link:focus { transform: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 48px;
  padding: 0 var(--space-4);
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover { background-color: color-mix(in srgb, var(--color-ink) 8%, transparent); }
.btn--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover { background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-ink)); }
.btn--accent {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover { background-color: color-mix(in srgb, var(--color-accent) 84%, var(--color-ink)); }
.btn--ghost {
  border-color: var(--color-line);
  color: var(--color-ink-soft);
  font-weight: 500;
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}
.section--dark .btn--ghost, .panel--dark .btn--ghost {
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.section--dark .btn--ghost:hover, .panel--dark .btn--ghost:hover {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 70%, var(--color-contrast-accent));
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
}
.btn--sm { min-height: 38px; padding: 0 var(--space-3); font-size: var(--text-sm); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
}
.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
  flex: none;
}
.badge--live {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: color-mix(in srgb, var(--color-primary) 72%, var(--color-ink));
}
.badge--verified {
  background-color: var(--color-highlight);
  border-color: var(--color-accent);
  color: color-mix(in srgb, var(--color-accent) 78%, var(--color-ink));
}
.badge--pending {
  background-color: var(--color-surface-deep);
  border-color: var(--color-ink-muted);
  color: var(--color-ink-muted);
}
.badge--open {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.badge--closed {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--dark .badge, .panel--dark .badge {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 82%, var(--color-contrast-ink));
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.section--dark .badge--live, .panel--dark .badge--live {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.chipbar { display: flex; flex-wrap: wrap; gap: var(--space-1); }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.chip:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-ink);
}
.chip[aria-pressed="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-weight: 700;
}
.chip--accent[aria-pressed="true"] {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.filter-count {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-ink);
}
[data-filter-item] {
  transition: background-color .18s ease;
}
[data-filter-item][data-tags*="home"] { border-left: var(--border-thick) solid var(--color-surface-deep); }
[data-filter-item][data-tags*="away"] { border-left: var(--border-thick) solid var(--color-primary-soft); }

.fold {
  border-top: var(--border-thin) solid var(--color-line);
  padding-block: var(--space-1);
}
.fold:last-of-type { border-bottom: var(--border-thin) solid var(--color-line); }
.fold__trigger {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-ink);
}
.fold__index {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  padding-top: 3px;
}
.fold__mark {
  margin-left: auto;
  flex: none;
  position: relative;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: var(--border-thin) solid var(--color-line);
}
.fold__mark::before, .fold__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--color-ink-soft);
}
.fold__mark::before { width: 12px; height: 2px; }
.fold__mark::after { width: 2px; height: 12px; transition: transform .2s ease; }
.fold[data-open] .fold__mark { border-color: var(--color-accent); background-color: var(--color-highlight); }
.fold[data-open] .fold__mark::after { transform: translate(-50%, -50%) scaleY(0); }
.fold__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .3s ease;
}
.fold__panel > div {
  overflow: hidden;
  visibility: hidden;
  transition: visibility .3s ease;
}
.fold[data-open] .fold__panel { grid-template-rows: 1fr; }
.fold[data-open] .fold__panel > div { visibility: visible; }
.fold__body { padding: 0 0 var(--space-3) calc(var(--space-2) + 22px); }
.section--dark .fold { border-color: var(--color-contrast-line); }
.section--dark .fold__trigger { color: var(--color-contrast-ink); }
.section--dark .fold__mark { border-color: var(--color-contrast-line); }
.section--dark .fold__mark::before, .section--dark .fold__mark::after { background-color: var(--color-contrast-ink); }

.panel {
  position: relative;
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  padding: var(--space-4);
}
.panel--soft { background-color: var(--color-surface-alt); }
.panel--round { border-radius: var(--radius-md); }
.panel--pill { border-radius: var(--radius-sm); }
.panel--primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.panel--accent {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.panel--dark {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.panel--dark h1, .panel--dark h2, .panel--dark h3, .panel--dark h4,
.panel--primary h1, .panel--primary h2, .panel--primary h3, .panel--primary h4,
.panel--accent h1, .panel--accent h2, .panel--accent h3, .panel--accent h4 { color: inherit; }
.panel--dark p, .panel--primary p, .panel--accent p { color: inherit; }
.panel--dark .stat__num, .panel--primary .stat__num, .panel--accent .stat__num { color: inherit; }

.stat { display: grid; gap: 4px; }
.stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.stat__label { font-size: var(--text-sm); color: var(--color-ink-muted); letter-spacing: 0.04em; }
.stat--primary .stat__num { color: var(--color-primary); }
.stat--accent .stat__num { color: var(--color-accent); }

.dial {
  --dial-size: 180px;
  width: var(--dial-size);
  height: var(--dial-size);
  border-radius: 50%;
  border: var(--border-thick) solid var(--color-primary);
  background-color: var(--color-surface);
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 2px;
  text-align: center;
  padding: var(--space-3);
}
.dial__num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-ink);
}
.dial__label { font-size: var(--text-sm); color: var(--color-ink-muted); }
.dial--accent { border-color: var(--color-accent); }
.dial--dark {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-accent);
}
.dial--dark .dial__num { color: var(--color-contrast-ink); }
.dial--dark .dial__label { color: color-mix(in srgb, var(--color-contrast-ink) 70%, var(--color-contrast-surface)); }

.table-scroll { overflow-x: auto; }
.data-table {
  border-top: var(--border-thick) solid var(--color-ink);
  font-size: var(--text-sm);
  min-width: 560px;
}
.data-table th {
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-ink);
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.data-table td {
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
}
.data-table tbody tr:nth-child(even) { background-color: var(--color-surface-deep); }
.data-table .num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-ink);
  letter-spacing: -0.01em;
}
.section--dark .data-table { border-top-color: var(--color-contrast-ink); }
.section--dark .data-table th { color: var(--color-contrast-ink); border-bottom-color: var(--color-contrast-line); }
.section--dark .data-table td { color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface)); border-bottom-color: var(--color-contrast-line); }
.section--dark .data-table tbody tr:nth-child(even) { background-color: color-mix(in srgb, var(--color-contrast-surface) 82%, var(--color-contrast-ink)); }
.section--dark .data-table .num { color: var(--color-contrast-ink); }

.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  background-image: repeating-linear-gradient(135deg, color-mix(in srgb, var(--color-line) 62%, transparent) 0 1px, transparent 1px 12px);
  aspect-ratio: 16 / 10;
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--pill { border-radius: var(--radius-lg); aspect-ratio: 21 / 9; }
.media--oval { border-radius: var(--radius-md); aspect-ratio: 4 / 5; }
.media--circle { border-radius: 50%; aspect-ratio: 1 / 1; }
.media--arch { border-radius: var(--radius-lg) var(--radius-lg) 0 0; aspect-ratio: 3 / 4; }
.media--block { border-radius: 0; }
.media__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
  padding: var(--space-4);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}
.media__overlay h3, .media__overlay strong { color: var(--color-contrast-ink); }
.media__overlay p { color: color-mix(in srgb, var(--color-contrast-ink) 82%, var(--color-contrast-surface)); }
.media__cap { margin-top: var(--space-1); font-size: var(--text-sm); color: var(--color-ink-muted); }

.trace {
  position: relative;
  display: grid;
  gap: var(--space-4);
  padding-left: var(--space-6);
}
.trace::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: var(--border-thin);
  background-color: var(--color-line);
}
.trace__item { position: relative; }
.trace__node {
  position: absolute;
  left: calc(var(--space-6) * -1);
  top: 2px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  background-color: var(--color-surface);
  border: var(--border-thick) solid var(--color-line);
}
.trace__item[data-state="done"] .trace__node {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.trace__item[data-state="active"] .trace__node {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.section--dark .trace::before { background-color: var(--color-contrast-line); }
.section--dark .trace__node {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.section--dark .trace__item[data-state="active"] .trace__node {
  background-color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.slant-list { display: grid; gap: var(--space-2); }
.slant-list > *:nth-child(2) { margin-left: var(--space-3); }
.slant-list > *:nth-child(3) { margin-left: var(--space-6); }
.slant-list > *:nth-child(4) { margin-left: calc(var(--space-6) + var(--space-3)); }
.slant-list > *:nth-child(5) { margin-left: var(--space-8); }
.slant-list > *:nth-child(n+6) { margin-left: calc(var(--space-8) + var(--space-2)); }

.card-stack { display: grid; gap: var(--space-2); }
.card-stack__card {
  position: relative;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-left: 6px solid var(--color-contrast-accent);
}
.card-stack__card h3, .card-stack__card strong { color: var(--color-contrast-ink); }
.card-stack__card p { color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface)); max-width: none; }

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.crumbs li { display: flex; align-items: center; }
.crumbs li + li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-line);
  margin-inline: var(--space-2) var(--space-1);
}
.crumbs a { color: var(--color-ink-soft); border-bottom: var(--border-thin) solid transparent; }
.crumbs a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.crumbs [aria-current="page"] { color: var(--color-ink); font-weight: 700; }

/* ============================================================
   5 · 头部：悬浮胶囊导航＋三色条
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: saturate(1.15) blur(10px);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.site-header__rule {
  display: grid;
  grid-template-columns: 3fr 1fr 1fr;
  height: 6px;
}
.site-header__rule span:nth-child(1) { background-color: var(--color-primary); }
.site-header__rule span:nth-child(2) { background-color: var(--color-accent); }
.site-header__rule span:nth-child(3) { background-color: var(--color-contrast-surface); }
.site-header__inner {
  position: relative;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2) var(--gutter);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: padding-block .22s ease;
}
.site-header[data-condensed] .site-header__inner { padding-block: 6px; }

.brand-island {
  flex: none;
  padding: 5px var(--space-3) 5px 5px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
}
.brand { display: flex; align-items: center; gap: var(--space-2); }
.brand__mark {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: var(--color-primary);
  overflow: hidden;
  flex: none;
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 50%;
  height: 100%;
  background-color: var(--color-contrast-surface);
}
.brand__text { display: block; }
.brand__name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.1;
  letter-spacing: 0.1em;
  color: var(--color-ink);
}
.brand__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  padding: 5px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
}
.site-nav__list { display: flex; align-items: center; gap: 2px; }
.site-nav__list a {
  display: inline-flex;
  align-items: center;
  padding: 9px var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
  white-space: nowrap;
}
.site-nav__list a:hover { background-color: var(--color-surface-alt); color: var(--color-ink); }
.site-nav__list a[aria-current="page"] {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: var(--space-1);
  min-height: 44px;
  padding: 0 var(--space-3) 0 var(--space-2);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  cursor: pointer;
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars i { display: block; height: var(--border-thin); background-color: currentColor; }
.nav-toggle__bars i:nth-child(1) { background-color: var(--color-primary); }
.nav-toggle__bars i:nth-child(2) { width: 72%; background-color: var(--color-accent); }
.nav-toggle__bars i:nth-child(3) { width: 44%; background-color: var(--color-contrast-surface); }

.site-header__strip {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: 0 var(--gutter) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.strip-note {
  max-width: none;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.site-header[data-condensed] .strip-note { display: none; }
.strip-quick { display: flex; gap: var(--space-1); margin-left: auto; }
.quick-link {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.quick-link--dark {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.quick-link--dark:hover {
  background-color: color-mix(in srgb, var(--color-contrast-surface) 78%, var(--color-contrast-accent));
  color: var(--color-contrast-ink);
}
.quick-link--accent {
  background-color: var(--color-highlight);
  border: var(--border-thin) solid var(--color-accent);
  color: color-mix(in srgb, var(--color-accent) 82%, var(--color-ink));
}
.quick-link--accent:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

/* ============================================================
   6 · 页脚：线框＋刻度收口
   ============================================================ */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface-alt);
  border-top: var(--border-thick) solid var(--color-ink);
  color: var(--color-ink-soft);
}
.site-footer__ruler {
  height: 26px;
  border-bottom: var(--border-thin) solid var(--color-line);
  background-image:
    repeating-linear-gradient(90deg, var(--color-line) 0 2px, transparent 2px 24px),
    repeating-linear-gradient(90deg, var(--color-ink-muted) 0 2px, transparent 2px 120px);
  background-size: 100% 10px, 100% 22px;
  background-repeat: repeat-x;
  background-position: 0 0, 0 0;
}
.site-footer__water {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 240px;
  pointer-events: none;
  background-image: repeating-linear-gradient(-7deg, color-mix(in srgb, var(--color-primary) 9%, transparent) 0 1px, transparent 1px 13px);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 72%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 72%);
}
.footer-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-8) var(--gutter) var(--space-6);
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  gap: var(--space-8);
}
.footer-brand__mark {
  position: relative;
  display: block;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-primary);
  overflow: hidden;
  margin-bottom: var(--space-3);
}
.footer-brand__mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 50%;
  background-color: var(--color-accent);
}
.footer-brand__name {
  max-width: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.08em;
  color: var(--color-ink);
}
.footer-brand__line {
  margin-top: var(--space-1);
  max-width: 34ch;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}
.footer-brand__meta {
  margin-top: var(--space-2);
  max-width: 34ch;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-col--data {
  border-left: var(--border-thin) solid var(--color-line);
  padding-left: var(--space-6);
}
.footer-col--data .offset-rule { margin-left: calc(var(--space-6) * -1 - var(--border-thin)); }
.footer-badges { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-bottom: var(--space-4); }
.footer-band {
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thick) solid var(--color-line);
  padding-block: var(--space-3);
}
.footer-band ul { display: flex; flex-wrap: wrap; align-items: center; }
.footer-band li { display: flex; align-items: center; }
.footer-band li + li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-ink-muted);
  opacity: .45;
  margin-inline: var(--space-2);
}
.footer-band a {
  padding-block: 4px;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid transparent;
}
.footer-band a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.footer-legal {
  display: grid;
  gap: 4px;
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-legal p { max-width: none; color: inherit; }
.footer-legal a { color: var(--color-ink-soft); border-bottom: var(--border-thin) solid var(--color-line); }
.footer-legal a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.footer-note {
  margin-top: var(--space-3);
  max-width: 54ch;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.footer-base {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-3) var(--gutter) var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}
.footer-base p {
  max-width: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}
.footer-base__stamp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
}

/* ============================================================
   7 · 焦点与动效
   ============================================================ */
:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 3px;
}
.section--dark :focus-visible,
.panel--dark :focus-visible,
.card-stack__card :focus-visible,
.site-footer :focus-visible { outline-color: var(--color-contrast-accent); }

@keyframes ring-pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-primary) 55%, transparent); }
  100% { box-shadow: 0 0 0 18px transparent; }
}
.is-current-round { animation: ring-pulse 1.1s ease-out 1; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .fold__panel { transition: none; }
}

/* ============================================================
   8 · 响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: var(--gutter);
    right: var(--gutter);
    top: calc(100% + var(--space-1));
    z-index: 20;
    display: none;
    flex-direction: column;
    align-items: stretch;
    margin-left: 0;
    padding: var(--space-2);
    border: var(--border-thick) solid var(--color-ink);
    border-radius: var(--radius-lg);
    background-color: var(--color-surface);
  }
  .site-header[data-open] .site-nav { display: flex; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 4px; }
  .site-nav__list a {
    padding: 12px var(--space-3);
    font-size: var(--text-base);
    border-radius: var(--radius-pill);
  }
}

@media (max-width: 980px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid > [class*="span-"] { grid-column: span 6; }
  .footer-inner { grid-template-columns: minmax(0, 1fr); gap: var(--space-6); }
  .footer-col--data { border-left: 0; padding-left: 0; }
  .footer-col--data .offset-rule { margin-left: 0; }
  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--section-y); }
  .slant-list > *,
  .slant-list > *:nth-child(n) { margin-left: 0; }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .grid > [class*="span-"] { grid-column: span 1; }
  .site-header__strip { flex-wrap: wrap; }
  .strip-note { font-size: var(--text-xs); letter-spacing: 0.12em; }
  .strip-quick { margin-left: 0; width: 100%; }
  .quick-link { flex: 1; justify-content: center; }
  .brand__sub { display: none; }
  .dial { --dial-size: 148px; }
  .panel { padding: var(--space-3); }
  .footer-base { justify-content: flex-start; }
  .trace { padding-left: var(--space-4); }
  .trace__node { left: calc(var(--space-4) * -1); width: 24px; height: 24px; }
  .trace::before { left: 11px; }
}