/* ==========================================================================
   半岛赛场 /assets/site.css
   共享外壳：reset → 变量 → 基础排版 → 布局 → 头部 → 页脚 → 组件 → 响应式
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }

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

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

a { color: inherit; text-decoration: none; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

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

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色 */
  --ink-abyss: #07131C;
  --harbor-blue: #0E2230;
  --paper-warm: #F1E8D6;
  --paper-deep: #DDD0B6;
  --mist-teal: #7FB3AE;
  --sand-green: #B7E36A;
  --ember-orange: #FF7A3D;
  --chalk: #E8EFEC;
  --slate-mute: #5E7378;
  --amber-note: #E8B04B;

  /* 语义色 */
  --bg: var(--ink-abyss);
  --surface: var(--harbor-blue);
  --text: var(--chalk);
  --text-soft: rgba(232, 239, 236, .82);
  --line: rgba(127, 179, 174, .26);
  --line-strong: rgba(127, 179, 174, .52);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-section: "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-data: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  /* 尺度 */
  --shell: 1240px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --gap-xs: .5rem;
  --gap-sm: .75rem;
  --gap-md: 1.25rem;
  --gap-lg: 2rem;
  --gap-xl: 3rem;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    linear-gradient(90deg, rgba(127, 179, 174, .055) 1px, transparent 1px),
    linear-gradient(180deg, rgba(127, 179, 174, .045) 1px, transparent 1px),
    radial-gradient(circle at 16% -12%, rgba(127, 179, 174, .12), transparent 58%);
  background-size: 96px 96px, 96px 96px, auto;
  background-repeat: repeat, repeat, no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  text-wrap: balance;
}

::selection {
  background: var(--sand-green);
  color: var(--ink-abyss);
}

/* ---------- 4. 布局 ---------- */
.container {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.page-shell {
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(3rem, 6vw, 5rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(.75rem, 2vw, 1.5rem);
  row-gap: clamp(1.25rem, 3vw, 2rem);
}

.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; }

.grid--narrative {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(.75rem, 2vw, 1.5rem);
  row-gap: var(--gap-lg);
}

.narrative-main { grid-column: 1 / span 8; }
.narrative-aside { grid-column: 10 / span 3; align-self: start; }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
}

/* ---------- 5. 头部 ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -140%);
  padding: .7rem 1.35rem;
  background: var(--sand-green);
  color: var(--ink-abyss);
  font-family: var(--font-section);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .18em;
  transition: transform .18s ease;
}

.skip-link:focus-visible { transform: translate(-50%, 0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(7, 19, 28, .985), rgba(9, 26, 38, .94));
  border-bottom: 1px solid var(--line-strong);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: box-shadow .24s ease;
}

.site-header.is-condensed {
  box-shadow: 0 20px 36px -28px #000;
}

.header-inner {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.header-masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  column-gap: var(--gap-lg);
  padding-block: 1rem .85rem;
  transition: padding .24s ease;
}

.site-header.is-condensed .header-masthead { padding-block: .55rem; }

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  justify-self: start;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  line-height: 1.1;
  letter-spacing: .08em;
  color: var(--chalk);
}

.brand__latin {
  font-family: var(--font-section);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .44em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.header-status {
  display: flex;
  align-items: center;
  gap: .55rem;
  max-height: 2.4rem;
  overflow: hidden;
  font-family: var(--font-data);
  font-size: .73rem;
  letter-spacing: .06em;
  color: var(--mist-teal);
  white-space: nowrap;
  transition: max-height .24s ease, opacity .18s ease;
}

.site-header.is-condensed .header-status {
  max-height: 0;
  opacity: 0;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--sand-green);
  box-shadow: 0 0 0 3px rgba(183, 227, 106, .18);
  animation: status-pulse 2.6s ease-in-out infinite;
}

@keyframes status-pulse {
  50% { box-shadow: 0 0 0 7px rgba(183, 227, 106, .04); }
}

.header-utility {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--gap-md);
  justify-self: end;
}

.utility-note {
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--slate-mute);
  white-space: nowrap;
}

.utility-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-section);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--mist-teal);
  border-bottom: 1px solid transparent;
  padding-block: 2px;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.utility-link:hover {
  color: var(--chalk);
  border-bottom-color: var(--line-strong);
}

.utility-link--accent {
  padding: .5rem 1.05rem;
  background: var(--sand-green);
  color: var(--ink-abyss);
  border-bottom: 0;
  letter-spacing: .12em;
}

.utility-link--accent:hover {
  background: #C9EE92;
  color: var(--ink-abyss);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .48rem .7rem;
  border: 1px solid var(--line-strong);
  color: var(--chalk);
}

.nav-toggle__label {
  font-family: var(--font-section);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .22em;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--sand-green);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
  transform: translateY(2.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

.site-nav {
  border-top: 1px solid var(--line);
}

.nav-list {
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: stretch;
}

.nav-item {
  display: flex;
  flex: 0 0 auto;
}

.nav-item + .nav-item { border-left: 1px solid var(--line); }

.nav-link {
  position: relative;
  display: block;
  padding: .78rem clamp(.9rem, 2vw, 1.55rem);
  font-family: var(--font-section);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--chalk);
  transition: color .18s ease, background .18s ease, padding .24s ease;
}

.site-header.is-condensed .nav-link { padding-block: .46rem; }

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--sand-green);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s ease;
}

.nav-link:hover {
  background: rgba(127, 179, 174, .08);
  color: #fff;
}

.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--sand-green); }

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(127, 179, 174, .16);
  overflow: hidden;
}

.read-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--mist-teal), var(--sand-green) 62%, var(--ember-orange));
  transition: width .12s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--surface);
  border-top: 1px solid var(--line-strong);
  color: var(--text);
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--sand-green) 0 22%,
    var(--mist-teal) 22% 62%,
    var(--ember-orange) 62% 74%,
    rgba(94, 115, 120, .5) 74% 100%
  );
}

.footer-inner {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
  padding-block: clamp(2.25rem, 5vw, 3.75rem) clamp(1.5rem, 3vw, 2.25rem);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 2.1fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-bottom: var(--gap-lg);
  border-bottom: 1px solid var(--line);
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  line-height: 1.15;
  letter-spacing: .1em;
  color: var(--chalk);
}

.footer-brand__latin {
  display: block;
  margin-top: .4rem;
  font-family: var(--font-section);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .46em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.footer-brand__note {
  margin-top: 1rem;
  max-width: 32ch;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--slate-mute);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-lg);
}

.footer-group__title {
  margin-bottom: .9rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-section);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--sand-green);
}

.footer-group__list {
  display: grid;
  gap: .55rem;
}

.footer-link {
  display: inline-block;
  font-size: .89rem;
  color: var(--chalk);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.footer-link:hover {
  color: var(--sand-green);
  border-bottom-color: var(--sand-green);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--gap-md) var(--gap-lg);
  padding-block: var(--gap-lg);
  border-bottom: 1px solid var(--line);
}

.footer-contact__item {
  display: grid;
  gap: .25rem;
}

.footer-contact__label {
  font-family: var(--font-section);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--slate-mute);
}

.footer-contact__value {
  font-family: var(--font-data);
  font-size: .84rem;
  line-height: 1.5;
  letter-spacing: .01em;
  color: var(--chalk);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  padding-top: var(--gap-md);
}

.footer-legal {
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .04em;
  color: var(--slate-mute);
}

.footer-meta {
  font-family: var(--font-section);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--slate-mute);
}

.footer-note {
  margin-top: var(--gap-sm);
  max-width: 62ch;
  font-size: .78rem;
  line-height: 1.65;
  color: var(--slate-mute);
}

/* ---------- 7. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .82rem 1.5rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--chalk);
  font-family: var(--font-section);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-align: center;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}

.btn:hover {
  border-color: var(--sand-green);
  color: var(--sand-green);
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--sand-green);
  border-color: var(--sand-green);
  color: var(--ink-abyss);
}

.btn--primary:hover {
  background: #C9EE92;
  border-color: #C9EE92;
  color: var(--ink-abyss);
}

.btn--ghost {
  border-color: var(--line);
  color: var(--mist-teal);
}

.btn--ghost:hover {
  border-color: var(--sand-green);
  color: var(--sand-green);
}

.breadcrumbs { padding-block: var(--gap-md) 0; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--slate-mute);
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--line-strong);
}

.breadcrumbs__link {
  color: var(--mist-teal);
  transition: color .18s ease;
}

.breadcrumbs__link:hover { color: var(--sand-green); }

.breadcrumbs [aria-current="page"] { color: var(--chalk); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-section);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--sand-green);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 4vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--chalk);
}

.chapter-band {
  display: flex;
  align-items: baseline;
  gap: var(--gap-md);
  margin-bottom: var(--gap-md);
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--line-strong);
}

.chapter-band__no {
  font-family: var(--font-data);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ember-orange);
}

.chapter-band__label {
  font-family: var(--font-section);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.chapter--paper {
  background-color: var(--paper-warm);
  background-image:
    linear-gradient(90deg, rgba(7, 19, 28, .05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(7, 19, 28, .05) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink-abyss);
}

.chapter--paper .section-title { color: var(--ink-abyss); }

.chapter--paper .eyebrow { color: #2F6E6A; }

.chapter--paper .chapter-band { border-bottom-color: rgba(7, 19, 28, .22); }

.chapter--paper .chapter-band__no { color: #B84A16; }

.chapter--paper .chapter-band__label { color: #2F6E6A; }

.prose {
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  margin-top: 2.1em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.25;
  color: var(--chalk);
}

.prose h3 {
  margin-top: 1.7em;
  font-family: var(--font-section);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--sand-green);
}

.prose ul {
  display: grid;
  gap: .5rem;
}

.prose ul li {
  position: relative;
  padding-left: 1.25rem;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 8px;
  height: 1px;
  background: var(--ember-orange);
}

.prose a {
  color: var(--sand-green);
  border-bottom: 1px solid currentColor;
}

.prose--paper { color: rgba(7, 19, 28, .84); }

.prose--paper h2 { color: var(--ink-abyss); }

.prose--paper h3 { color: #2F6E6A; }

.prose--paper a { color: #245B58; }

.data-value {
  font-family: var(--font-data);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--chalk);
}

.data-value--score {
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  color: var(--ember-orange);
}

.data-value--mute {
  font-size: .9rem;
  color: var(--slate-mute);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .22rem .6rem;
  border: 1px solid var(--line);
  font-family: var(--font-section);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.tag--live {
  border-color: var(--ember-orange);
  color: var(--ember-orange);
}

.tag--done {
  border-color: rgba(94, 115, 120, .6);
  color: var(--slate-mute);
}

.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--harbor-blue), #0a1a26 70%, #0d2433);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
  transition: filter .3s ease, transform .3s ease;
}

.image-frame:hover img { filter: saturate(.92) contrast(1.06); }

.image-frame--wide { aspect-ratio: 16 / 9; }
.image-frame--portrait { aspect-ratio: 3 / 4; }
.image-frame--square { aspect-ratio: 1 / 1; }
.image-frame--tall { aspect-ratio: 4 / 5; }

.image-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: .35rem .7rem;
  background: rgba(7, 19, 28, .84);
  border-top: 1px solid var(--line-strong);
  border-right: 1px solid var(--line-strong);
  font-family: var(--font-data);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--mist-teal);
}

.image-frame__caption {
  margin-top: .55rem;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--slate-mute);
}

/* ---------- 8. 入场显现 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.js-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity .24s ease, transform .24s ease;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-link {
    padding-inline: .85rem;
    font-size: .84rem;
    letter-spacing: .13em;
  }
}

@media (max-width: 960px) {
  .narrative-main,
  .narrative-aside { grid-column: 1 / -1; }

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

@media (max-width: 900px) {
  html { scroll-padding-top: 92px; }

  .header-inner {
    width: 100%;
    padding-inline: var(--gutter);
  }

  .header-masthead {
    grid-template-columns: minmax(0, 1fr) auto auto;
    grid-template-areas: "brand utility toggle";
    align-items: center;
    column-gap: var(--gap-sm);
    padding-block: .78rem;
  }

  .site-header.is-condensed .header-masthead { padding-block: .6rem; }

  .brand { grid-area: brand; }

  .brand__name { font-size: 1.15rem; letter-spacing: .06em; }

  .brand__latin { font-size: .56rem; letter-spacing: .34em; }

  .header-status { display: none; }

  .header-utility { grid-area: utility; gap: 0; }

  .utility-note { display: none; }

  .header-utility .utility-link { display: none; }

  .header-utility .utility-link--accent {
    display: inline-flex;
    padding: .42rem .7rem;
    font-size: .72rem;
    letter-spacing: .1em;
  }

  .nav-toggle {
    display: inline-flex;
    grid-area: toggle;
  }

  .site-nav {
    display: none;
    margin-inline: calc(var(--gutter) * -1);
    border-top: 1px solid var(--line-strong);
    background: var(--harbor-blue);
  }

  .site-nav[data-open="true"] { display: block; }

  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .nav-item + .nav-item {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .nav-link,
  .site-header.is-condensed .nav-link {
    padding: .92rem var(--gutter);
    font-size: .88rem;
    letter-spacing: .16em;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    background: rgba(183, 227, 106, .1);
    box-shadow: inset 2px 0 0 var(--sand-green);
  }

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

  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 820px) {
  .col-3, .col-4, .col-5,
  .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
}

@media (max-width: 560px) {
  .footer-groups { grid-template-columns: 1fr; gap: var(--gap-md); }

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

  .chapter-band { flex-wrap: wrap; gap: .35rem var(--gap-sm); }
}

/* ---------- 10. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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

  .btn:hover { transform: none; }
}