:root {
  --color-surface: #fefefe;
  --color-surface-alt: #f5f5f5;
  --color-surface-deep: #e8e9e9;
  --color-ink: #454b4f;
  --color-ink-soft: #697177;
  --color-ink-muted: #798086;
  --color-line: #dddede;
  --color-primary: #307ab5;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e1ecf4;
  --color-accent: #cc3f33;
  --color-accent-ink: #ffffff;
  --color-highlight: #f5dcd9;
  --color-focus: #d93526;
  --color-contrast-surface: #12191e;
  --color-contrast-ink: #e4e6e7;
  --color-contrast-line: #40464a;
  --color-contrast-accent: #d35a4f;
  --overlay-scrim: linear-gradient(180deg, rgba(18, 25, 30, 0.35) 0%, rgba(18, 25, 30, 0.72) 55%, rgba(18, 25, 30, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 11.4px;
  --text-sm: 14.3px;
  --text-base: 16px;
  --text-lg: 20.0px;
  --text-xl: 25.0px;
  --text-2xl: 31.2px;
  --text-3xl: 39.1px;
  --text-4xl: 48.8px;
  --text-display: clamp(34px, 4.6vw, 59px);
  --text-figure: clamp(28px, 3.3vw, 42px);
  --weight-heading: 622;
  --weight-body: 400;
  --leading-body: 1.69;
  --leading-heading: 1.23;
  --tracking-heading: 0.004em;
  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 14px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(69, 75, 79, 0.08);
  --shadow-2: 0 18px 44px rgba(69, 75, 79, 0.14);
  --space-1: 7px;
  --space-2: 14px;
  --space-3: 21px;
  --space-4: 28px;
  --space-6: 42px;
  --space-8: 56px;
  --container: 1220px;
  --measure: 70ch;
  --gutter: 14px;
  --section-y: 68px;
  --section-y-lg: 95px;
}

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

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

body {
  margin: 0;
  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);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  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-3); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { color: color-mix(in srgb, var(--color-primary) 78%, var(--color-ink)); }

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

button { font: inherit; color: inherit; }

code, kbd, samp, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.94em;
}

table { border-collapse: collapse; width: 100%; }

hr { border: 0; border-top: var(--border-thin) solid var(--color-line); margin: var(--space-4) 0; }

::selection {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible { border-radius: var(--radius-sm); }

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -60px;
  z-index: 120;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  transition: top 180ms ease-out;
}
.skip-link:focus {
  top: var(--space-2);
  color: var(--color-contrast-ink);
}

/* ============ 布局容器与栅格 ============ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

@media (min-width: 1025px) {
  .col-5-offset-1 { grid-column: 2 / span 5; }
  .col-4-offset-2 { grid-column: 3 / span 4; }
  .col-7-offset-1 { grid-column: 2 / span 7; }
  .col-6-offset-3 { grid-column: 4 / span 6; }
}

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.stack--tight { gap: var(--space-1); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }

/* ============ 区块 ============ */
.section { padding: var(--section-y) 0; }
.section--tight { padding: var(--space-6) 0; }
.section--lg { padding: var(--section-y-lg) 0; }
.section--alt { background-color: var(--color-surface-alt); }
.section--indexed { background-color: var(--color-surface-deep); }
.section--deep {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--deep .section__title,
.section--deep h1,
.section--deep h2,
.section--deep h3 { color: var(--color-contrast-ink); }
.section--deep .section__label { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }
.section--deep a { color: var(--color-contrast-ink); border-bottom: 1px solid var(--color-contrast-line); }
.section--deep a:hover { color: var(--color-contrast-accent); }

.section__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}
.section__label::before {
  content: "";
  width: 21px;
  height: var(--border-thin);
  background-color: var(--color-primary);
  flex: none;
}
.section__title {
  font-size: var(--text-2xl);
  margin: var(--space-2) 0 var(--space-3);
  letter-spacing: 0.02em;
}
.section__title--wide { letter-spacing: 0.2em; text-transform: uppercase; }

.edge-offset {
  position: relative;
  border-top: var(--border-thin) solid var(--color-line);
  margin: var(--space-6) 0;
}
.edge-offset::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--border-thin));
  inset-inline-start: 8.333%;
  width: 8.333%;
  height: 2px;
  background-color: var(--color-primary);
}
.edge-offset--alert::before { background-color: var(--color-accent); }
.edge-offset--narrow::before { inset-inline-start: 58.333%; width: 4.166%; }

/* ============ 面板体系 ============ */
.panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: border-color 200ms ease-out, box-shadow 200ms ease-out;
}
.panel:hover {
  border-color: color-mix(in srgb, var(--color-primary) 42%, var(--color-line));
  box-shadow: var(--shadow-2);
}
.panel:focus-within {
  border-color: var(--color-focus);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-focus) 40%, transparent);
}

.panel--metric {
  border-inline-start: 2px solid var(--color-primary);
  padding: var(--space-4) var(--space-4) var(--space-3);
  gap: var(--space-3);
  border-start-start-radius: var(--radius-md);
  border-end-start-radius: var(--radius-md);
}
.panel--metric.is-alert { border-inline-start-color: var(--color-accent); }

.panel--strip {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  box-shadow: none;
}

.panel--axis { padding: 0; overflow: hidden; }
.panel--tower { padding: 0; overflow: hidden; }

.panel--deep {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}
.panel--deep .panel__title { color: var(--color-contrast-ink); }
.panel--deep .panel__note { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }
.panel--deep .metric__value { color: var(--color-contrast-ink); }
.panel--deep .metric__label,
.panel--deep .metric__unit { color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent); }

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.panel__title {
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
}
.panel__note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ============ 指标与状态 ============ */
.metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}
.metric--alert .metric__value { color: var(--color-accent); }
.metric__unit {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.metric__label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--promote {
  background-color: var(--color-primary-soft);
  color: color-mix(in srgb, var(--color-primary) 76%, var(--color-ink));
  border-color: color-mix(in srgb, var(--color-primary) 28%, transparent);
}
.tag--playoff {
  background-color: var(--color-surface-deep);
  color: var(--color-ink-soft);
  border-color: var(--color-line);
}
.tag--relegate {
  background-color: var(--color-highlight);
  color: color-mix(in srgb, var(--color-accent) 80%, var(--color-ink));
  border-color: color-mix(in srgb, var(--color-accent) 26%, transparent);
}
.tag--injury {
  background-color: var(--color-surface-deep);
  color: var(--color-ink-muted);
  border-color: var(--color-line);
}
.tag--pending {
  background-color: transparent;
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

/* ============ 赛季轴与联赛塔 ============ */
.axis-track {
  display: flex;
  align-items: stretch;
  gap: var(--gutter);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding: var(--space-3) var(--space-4);
  scroll-snap-type: x proximity;
  cursor: grab;
  scrollbar-width: thin;
  scrollbar-color: var(--color-line) transparent;
}
.axis-track::-webkit-scrollbar { height: 7px; }
.axis-track::-webkit-scrollbar-track { background-color: transparent; }
.axis-track::-webkit-scrollbar-thumb {
  background-color: var(--color-line);
  border-radius: var(--radius-pill);
}
.axis-track.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
  user-select: none;
}
.axis-node {
  flex: 0 0 auto;
  min-width: 128px;
  padding: var(--space-2) var(--space-3);
  border-inline-start: var(--border-thin) solid var(--color-line);
  scroll-snap-align: start;
}
.axis-node__round {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.axis-node__value {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-ink);
}

.tower-list { display: flex; flex-direction: column; }
.tower-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.tower-list__item:last-child { border-bottom: 0; }
.tower-list__item:hover { background-color: var(--color-surface-alt); }
.tower-list__rank {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
}
.tower-list__name {
  font-size: var(--text-sm);
  color: var(--color-ink);
}
.tower-list__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-base);
  color: var(--color-ink);
  text-align: right;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 10px 18px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 180ms ease-out, color 180ms ease-out, border-color 180ms ease-out;
}
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover {
  background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-contrast-surface));
  color: var(--color-primary-ink);
}
.btn--alert {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--alert:hover {
  background-color: color-mix(in srgb, var(--color-accent) 84%, var(--color-contrast-surface));
  color: var(--color-accent-ink);
}
.btn--ghost {
  background-color: var(--color-surface);
  border-color: var(--color-line);
  color: var(--color-ink);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============ 面包屑与页头 ============ */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: var(--space-2); }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-line);
}
.breadcrumb__item a { color: var(--color-ink-soft); }
.breadcrumb__item a:hover { color: var(--color-primary); }
.breadcrumb__item[aria-current="page"] { color: var(--color-primary); }

.page-head { padding: var(--space-6) 0 var(--space-4); }
.page-head__title {
  font-size: var(--text-3xl);
  letter-spacing: 0.06em;
  margin: var(--space-2) 0 var(--space-2);
}
.page-head__lede {
  max-width: var(--measure);
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}
.page-head__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

/* ============ 正文 ============ */
.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-xl); margin-top: var(--space-6); }
.prose h3 { font-size: var(--text-lg); margin-top: var(--space-4); }
.prose ul,
.prose ol {
  padding-inline-start: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.prose li {
  list-style: none;
  position: relative;
  padding-inline-start: var(--space-3);
}
.prose li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  top: 0.72em;
  width: 7px;
  height: var(--border-thin);
  background-color: var(--color-primary);
}
.prose blockquote {
  margin: 0;
  padding: var(--space-3) 0 var(--space-3) var(--space-4);
  border-inline-start: 2px solid var(--color-primary);
  color: var(--color-ink-soft);
}

/* ============ 图片容器 ============ */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-deep);
  background-image: linear-gradient(
    135deg,
    color-mix(in srgb, var(--color-primary) 12%, var(--color-surface-deep)) 0%,
    var(--color-surface-deep) 58%
  );
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--band { aspect-ratio: 32 / 9; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--narrow { aspect-ratio: 3 / 4; }

.media-frame__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}
.media-frame__caption {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}
.media-frame__fields {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

/* ============ 头部 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.header-status {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.header-status__inner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 30px;
  padding: 5px 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}
.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-contrast-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-contrast-accent) 22%, transparent);
}
.header-status__text { color: var(--color-contrast-ink); }
.header-status__meta {
  margin-inline-start: auto;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-height: 72px;
  padding-block: var(--space-3);
  transition: min-height 200ms ease-out, padding 200ms ease-out;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: none;
  color: var(--color-ink);
}
.brand:hover { color: var(--color-ink); }
.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
}
.brand__text { display: flex; flex-direction: column; }
.brand__line {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
  letter-spacing: 0.14em;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.nav-toggle {
  display: none;
  margin-inline-start: auto;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 12px;
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 180ms ease-out, color 180ms ease-out;
}
.nav-toggle:hover { border-color: var(--color-primary); }
.nav-toggle__bars { display: grid; gap: 3px; }
.nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 2px;
  background-color: currentColor;
}
.nav-toggle__label { white-space: nowrap; }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-inline-start: auto;
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.site-nav__item { display: block; }
.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 180ms ease-out, background-color 180ms ease-out, border-color 180ms ease-out;
}
.site-nav__link:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-alt);
}
.site-nav__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.site-nav__link[aria-current="page"],
.site-nav__link.is-current {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary-soft) 72%, transparent);
}
.site-nav__link[aria-current="page"] .site-nav__index,
.site-nav__link.is-current .site-nav__index { color: var(--color-primary); }
.site-nav__link[aria-current="page"]::after,
.site-nav__link.is-current::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-primary);
  flex: none;
}

.nav-cta {
  flex: none;
  padding: 8px 14px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 180ms ease-out, color 180ms ease-out;
}
.nav-cta:hover {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.site-header.is-compact .header-status { display: none; }
.site-header.is-compact .header-inner {
  min-height: 56px;
  padding-block: var(--space-1);
}
.site-header.is-compact .brand__sub { display: none; }
.site-header.is-compact .brand__mark { width: 32px; height: 32px; }

.reading-progress {
  position: absolute;
  inset-inline: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.reading-progress__bar {
  width: 100%;
  height: 100%;
  background-color: var(--color-focus);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 140ms linear;
}

/* ============ 页脚 ============ */
.site-footer {
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
}
.footer-top { padding: var(--section-y-lg) 0 var(--section-y); }
.footer-top__inner {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--space-8);
  align-items: start;
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.16em;
  color: var(--color-ink);
}
.footer-brand__note {
  margin: 0;
  max-width: 34ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.footer-brand__note:first-of-type {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.footer-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-4);
}
.footer-index__item { display: block; }
.footer-index__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: var(--space-2) 0 var(--space-2) 0;
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  transition: border-color 180ms ease-out, color 180ms ease-out;
}
.footer-index__link:hover {
  color: var(--color-primary);
  border-top-color: var(--color-primary);
}
.footer-index__link:focus-visible { border-top-color: var(--color-focus); }
.footer-index__label {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
}
.footer-index__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.footer-index__note {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.footer-bottom {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-4) 0;
}
.footer-bottom__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}
.footer-legal li { display: inline-flex; align-items: center; }
.footer-legal a {
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  padding-bottom: 1px;
}
.footer-legal a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.footer-copy {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

/* ============ 显现动效 ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(7px);
  transition: opacity 220ms ease-out, transform 220ms ease-out;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 3; }
  .col-6, .col-7, .col-8 { grid-column: span 6; }
  .col-9, .col-12 { grid-column: span 6; }
  .footer-top__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }
  .section { padding: var(--space-8) 0; }
  .section--lg { padding: var(--section-y) 0; }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    margin-inline-start: 0;
    padding: var(--space-3) var(--space-4) var(--space-4);
    background-color: var(--color-surface);
    border-bottom: var(--border-thin) solid var(--color-line);
    box-shadow: var(--shadow-2);
  }
  .site-nav[data-open="true"] { display: flex; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    justify-content: flex-start;
    padding: 12px 4px;
    border-bottom: var(--border-thin) solid var(--color-line);
    border-radius: 0;
    font-size: var(--text-base);
  }
  .site-nav__link[aria-current="page"],
  .site-nav__link.is-current {
    border-bottom-color: var(--color-line);
    border-inline-start: 2px solid var(--color-primary);
    padding-inline-start: 10px;
    background-color: color-mix(in srgb, var(--color-primary-soft) 72%, transparent);
  }
  .nav-cta {
    align-self: flex-start;
    padding: 10px 16px;
  }
  .header-status__meta { display: none; }
}

@media (max-width: 720px) {
  .container { padding-inline: var(--space-3); }
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 {
    grid-column: 1 / -1;
  }
  .section { padding: var(--space-6) 0; }
  .section--tight { padding: var(--space-4) 0; }
  .page-head { padding: var(--space-4) 0 var(--space-3); }
  .page-head__title { font-size: var(--text-2xl); }
  .page-head__lede { font-size: var(--text-base); }
  .header-inner {
    gap: var(--space-2);
    min-height: 62px;
    padding-block: var(--space-2);
  }
  .brand__sub { display: none; }
  .brand__line { font-size: var(--text-base); }
  .brand__mark { width: 34px; height: 34px; }
  .header-status__inner { font-size: var(--text-xs); letter-spacing: 0.04em; }
  .footer-index__list { grid-template-columns: minmax(0, 1fr); }
  .footer-top { padding: var(--space-6) 0 var(--space-4); }
  .axis-track { padding: var(--space-2) var(--space-3); }
  .media-frame--wide,
  .media-frame--band { aspect-ratio: 16 / 9; }
  .edge-offset::before { inset-inline-start: 0; width: 25%; }
}

/* ============ 动效与对比度偏好 ============ */
@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;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .reading-progress__bar { transition: none; }
}

@media (prefers-contrast: more) {
  .panel { border-color: var(--color-ink-soft); }
  .site-nav__link[aria-current="page"],
  .site-nav__link.is-current { outline: 2px solid var(--color-primary); }
}