:root {
  --color-surface: #2a2628;
  --color-surface-alt: #393436;
  --color-surface-deep: #4b4548;
  --color-ink: #cec0c8;
  --color-ink-soft: #a48e9b;
  --color-ink-muted: #8c7382;
  --color-line: #484245;
  --color-primary: #cf3591;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #412837;
  --color-accent: #1ae5e2;
  --color-accent-ink: #181115;
  --color-highlight: #274849;
  --color-focus: #0ef1ee;
  --color-contrast-surface: #f2f0f1;
  --color-contrast-ink: #363033;
  --color-contrast-line: #c9c6c7;
  --color-contrast-accent: #0e7775;
  --overlay-scrim: linear-gradient(180deg, rgba(242, 240, 241, 0.35) 0%, rgba(242, 240, 241, 0.72) 55%, rgba(242, 240, 241, 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: 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(43px, 8.8vw, 112px);
  --text-figure: clamp(36px, 6.3vw, 81px);
  --weight-heading: 607;
  --weight-body: 400;
  --leading-body: 1.78;
  --leading-heading: 1.21;
  --tracking-heading: 0.003em;
  --radius-sm: 8px;
  --radius-md: 8px;
  --radius-lg: 9px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 0 0 1px rgba(26, 229, 226, 0.35);
  --shadow-2: 0 0 28px rgba(26, 229, 226, 0.35);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1200px;
  --measure: 72ch;
  --gutter: 32px;
  --section-y: 106px;
  --section-y-lg: 148px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--color-surface);
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: transparent;
  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;
  font-kerning: normal;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58ch 58ch at 10% -12%, color-mix(in srgb, var(--color-primary) 17%, transparent), transparent 72%),
    radial-gradient(46ch 46ch at 94% 4%, color-mix(in srgb, var(--color-accent) 11%, transparent), transparent 74%);
}

img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6, p, figure, blockquote, figcaption { margin: 0; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 中文排版 ---------- */
h1, .h1 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

h2, .h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

h3, .h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

h4, .h4 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

p, li { text-wrap: pretty; }

.lead {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}
.prose a:hover { border-bottom-color: var(--color-accent); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.figure {
  display: block;
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 0.96;
  letter-spacing: -0.01em;
  color: var(--color-accent);
  transition: filter 160ms ease;
}
.figure:hover { filter: brightness(1.18); }

/* ---------- 焦点与可访问 ---------- */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-4)));
  transition: transform 160ms ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 容器与栅格 ---------- */
.shell {
  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);
}
.grid-12 > * { grid-column: span 12; min-width: 0; }

@media (min-width: 900px) {
  .grid-12 > .span-3 { grid-column: span 3; }
  .grid-12 > .span-4 { grid-column: span 4; }
  .grid-12 > .span-5 { grid-column: span 5; }
  .grid-12 > .span-6 { grid-column: span 6; }
  .grid-12 > .span-7 { grid-column: span 7; }
  .grid-12 > .span-8 { grid-column: span 8; }
  .grid-12 > .span-9 { grid-column: span 9; }
}

.rail {
  position: sticky;
  top: 132px;
  align-self: start;
}

/* ---------- 区段 ---------- */
.section { padding-block: var(--section-y); }
.section--tight { padding-block: var(--space-8); }
.section--deep { background-color: var(--color-surface-alt); }
.section--contrast {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--contrast .h1,
.section--contrast .h2,
.section--contrast .h3,
.section--contrast .h4,
.section--contrast h1,
.section--contrast h2,
.section--contrast h3,
.section--contrast h4 { color: var(--color-contrast-ink); }
.section--contrast .lead,
.section--contrast .eyebrow { color: color-mix(in srgb, var(--color-contrast-ink) 72%, var(--color-contrast-surface)); }
.section--contrast a { color: var(--color-contrast-accent); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.section--contrast .section-head { border-bottom-color: var(--color-contrast-line); }

/* ---------- 分隔与刻度 ---------- */
.rule {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}
.rule::after {
  content: "";
  flex: 1 1 auto;
  height: var(--border-thin);
  background-color: var(--color-line);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 12px 20px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: transparent;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}
.btn:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-2);
}
.btn--primary {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover { filter: brightness(1.08); }
.btn--ghost {
  border-color: color-mix(in srgb, var(--color-accent) 45%, transparent);
  color: var(--color-accent);
}
.btn--ghost:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
  box-shadow: var(--shadow-2);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}
.tag--accent {
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
  color: var(--color-accent);
}

/* ---------- 面板与卡片 ---------- */
.panel {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-alt);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
.panel:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}
.panel--glass {
  background-color: color-mix(in srgb, var(--color-surface-deep) 86%, transparent);
  backdrop-filter: blur(6px);
}

.callout {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.callout .h3,
.callout h3 { color: var(--color-contrast-ink); }
.callout a { color: var(--color-contrast-accent); }

/* ---------- 条目列表 ---------- */
.entry-list { list-style: none; }
.entry {
  display: grid;
  gap: var(--space-1);
  padding-block: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  transition: border-color 160ms ease;
}
.entry:hover { border-top-color: var(--color-primary); }
.entry-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.entry-desc {
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* ---------- 步骤 ---------- */
.steps {
  list-style: none;
  display: grid;
  gap: var(--space-3);
  counter-reset: stand-step;
}
.step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}
.step-idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb li + li::before {
  content: "/";
  color: var(--color-line);
}
.breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
.breadcrumb a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
}
.media-frame img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.media-frame[data-ratio="wide"] img { aspect-ratio: 21 / 9; }
.media-frame[data-ratio="square"] img { aspect-ratio: 1 / 1; }
.media-frame[data-ratio="portrait"] img { aspect-ratio: 4 / 5; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.media-frame[data-scrim="none"]::after { background: none; }
.media-frame[data-placeholder] {
  background-image:
    repeating-linear-gradient(90deg, color-mix(in srgb, var(--color-accent) 16%, transparent) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(0deg, color-mix(in srgb, var(--color-primary) 18%, transparent) 0 1px, transparent 1px 46px),
    radial-gradient(38ch 26ch at 30% 35%, color-mix(in srgb, var(--color-accent) 22%, transparent), transparent 68%);
}
.media-body {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  z-index: 1;
  padding: var(--space-4);
  color: var(--color-contrast-ink);
}
.media-kicker {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}
.media-title {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

/* ---------- 锚点定位与命中高亮 ---------- */
:where(section, article, div, li)[id] { scroll-margin-top: 132px; }

.is-flash { animation: stand-flash 1700ms ease-out 1; }
@keyframes stand-flash {
  0% { outline: 2px solid var(--color-accent); outline-offset: 6px; }
  70% { outline: 2px solid color-mix(in srgb, var(--color-accent) 55%, transparent); outline-offset: 4px; }
  100% { outline: 2px solid transparent; outline-offset: 2px; }
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: color-mix(in srgb, var(--color-surface) 92%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
}
.site-header.is-scrolled {
  border-bottom-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line));
}

.scroll-progress {
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  pointer-events: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 74px;
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
  text-decoration: none;
}
.brand-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  transition: color 160ms ease;
}
.brand:hover .brand-name { color: var(--color-primary-ink); }
.brand-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.site-nav { display: flex; align-items: center; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 2px;
  font-size: var(--text-sm);
  line-height: 1.25;
  text-decoration: none;
  color: var(--color-ink-soft);
  transition: color 160ms ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 160ms ease;
}
.nav-link:hover { color: var(--color-ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  transition: color 160ms ease;
}
.nav-link:hover .nav-idx { color: var(--color-primary); }
.nav-link[aria-current="page"] { color: var(--color-ink); }
.nav-link[aria-current="page"] .nav-idx { color: var(--color-accent); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background-color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}
.nav-toggle:hover { border-color: var(--color-primary); color: var(--color-ink); }
.nav-toggle-label { line-height: 1; }
.nav-toggle-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}
.nav-toggle-icon span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 160ms ease;
}
.site-header[data-open] .nav-toggle {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-ink);
}
.site-header[data-open] .nav-toggle-icon span:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle-icon span:last-child { transform: translateY(-3px) rotate(-45deg); }

/* ---------- 联赛切换带 ---------- */
.band {
  border-top: var(--border-thin) solid var(--color-line);
  background-color: color-mix(in srgb, var(--color-surface-alt) 62%, transparent);
}
.band-track {
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scroll-padding-inline: var(--space-4);
  padding-block: var(--space-2);
  scrollbar-width: thin;
}
.band-item {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 6px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}
.band-item:hover {
  border-color: var(--color-primary);
  color: var(--color-ink);
}
.band-item[aria-pressed="true"] {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--section-y);
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
}
.site-footer::before {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), transparent);
  opacity: 0.72;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--space-6);
  padding-block: var(--space-8) var(--space-6);
}
.footer-col { min-width: 0; }

.footer-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-weight: var(--weight-body);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
}
.footer-title-idx { color: var(--color-primary); }

.footer-list {
  list-style: none;
  display: grid;
  gap: 6px;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.footer-list a {
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
.footer-list a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

.footer-note {
  margin-top: var(--space-3);
  max-width: 42ch;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-3) var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-list { gap: var(--space-2); }
  .nav-link { font-size: var(--text-xs); }
  .nav-idx { font-size: var(--text-xs); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    display: none;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding-block: var(--space-2) var(--space-3);
    background-color: var(--color-surface-alt);
    border-bottom: var(--border-thin) solid var(--color-line);
    box-shadow: var(--shadow-2);
  }
  .site-header[data-open] .site-nav { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-inline: var(--space-4);
  }
  .nav-item + .nav-item { border-top: var(--border-thin) solid var(--color-line); }
  .nav-link {
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-2);
    padding-block: 14px;
    font-size: var(--text-base);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { color: var(--color-accent); }
  .rail { position: static; top: auto; }
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid > .footer-col:first-child { grid-column: span 2; }
  .section { padding-block: var(--space-8); }
  .figure { font-size: var(--text-3xl); }
}

@media (min-width: 901px) {
  .footer-col--index .footer-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-4);
  }
}

@media (max-width: 640px) {
  .shell { padding-inline: var(--space-3); }
  .header-inner { min-height: 66px; }
  .brand-name { font-size: var(--text-base); }
  .brand-sub { display: none; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); }
  .footer-grid > .footer-col:first-child { grid-column: auto; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .callout { padding: var(--space-4); }
  .media-body { padding: var(--space-3); }
  .media-title { font-size: var(--text-lg); }
}

/* ---------- 动效降级 ---------- */
@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;
  }
  .figure:hover { filter: none; }
  .is-flash { outline: 2px solid var(--color-accent); outline-offset: 4px; animation: none; }
}