/* ============================================================
   PG娱乐会馆 · 共享站点套装 (site.css)
   档案室 × 夜航图：墨蓝底色 / 暖白纸面 / 铜金索引 / 青瓷绿状态
   ============================================================ */

:root {
  --ink-900: #08131F;
  --ink-800: #0B1B2B;
  --ink-700: #12314A;
  --copper: #C08A4E;
  --copper-soft: #D9B27C;
  --paper: #F6F1E7;
  --paper-dim: #EDE5D7;
  --celadon: #6FBFA2;
  --slate: #8FA3B8;
  --line: #D7DEE5;
  --paper-ink: #33506A;

  --font-head: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', 'Menlo', monospace;

  --maxw: 1280px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius-lg: 22px;
  --radius-sm: 8px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  background: var(--ink-900);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .01em;
}

p { margin: 0; }

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

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

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

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

address { font-style: normal; }

[hidden] { display: none !important; }

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

::selection {
  background: var(--copper);
  color: var(--ink-900);
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: -64px;
  left: 16px;
  z-index: 300;
  padding: 10px 20px;
  background: var(--copper);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: 0 0 10px 10px;
  transition: top .22s var(--ease);
}

.skip-link:focus {
  top: 0;
}

/* ---------- 通用排版工具 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.container--narrow { max-width: 820px; }

.section {
  position: relative;
  padding: clamp(56px, 7vw, 96px) 0;
}

.section--paper {
  background: var(--paper);
  color: var(--ink-800);
}

.section--ink {
  background: var(--ink-900);
  color: var(--paper);
}

.section-head {
  display: grid;
  gap: 12px;
  max-width: 760px;
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.section-head__title {
  font-size: clamp(26px, 3.2vw, 38px);
  color: inherit;
}

.section-head__note {
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.section--paper .section-head__note { color: #4A627A; }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
}

.grid--split {
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
}

.grid--thirds {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-gap, 18px);
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, rgba(192, 138, 78, .55), rgba(192, 138, 78, 0));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--copper);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--copper);
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: rgba(246, 241, 231, .84);
}

.section--paper .lede { color: var(--paper-ink); }

.mono-label {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--slate);
  white-space: nowrap;
}

.mono-label::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--copper);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 14px;
  letter-spacing: .08em;
  transition: background-color .24s var(--ease), color .24s var(--ease),
              border-color .24s var(--ease), transform .24s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--solid {
  background: var(--copper);
  border-color: var(--copper);
  color: var(--ink-900);
  font-weight: 600;
}

.btn--solid:hover {
  background: var(--copper-soft);
  border-color: var(--copper-soft);
}

.btn--ghost {
  border-color: rgba(192, 138, 78, .55);
  color: var(--paper);
}

.btn--ghost:hover {
  background: rgba(192, 138, 78, .14);
  border-color: var(--copper);
}

.btn--quiet {
  padding: 0 4px;
  color: var(--copper);
}

.btn--quiet:hover { color: var(--copper-soft); }

.section--paper .btn--ghost {
  color: var(--ink-800);
  border-color: rgba(11, 27, 43, .28);
}

.section--paper .btn--ghost:hover {
  background: rgba(11, 27, 43, .06);
  border-color: var(--ink-700);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

/* ---------- 状态徽标 ---------- */
.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 11px 4px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
  white-space: nowrap;
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status--updated { color: var(--celadon); }
.status--review { color: var(--copper-soft); }
.status--archived { color: var(--slate); }

.status--updated::before {
  animation: lamp-pulse 3.4s ease-in-out infinite;
}

@keyframes lamp-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(111, 191, 162, .55); }
  50% { box-shadow: 0 0 0 4px rgba(111, 191, 162, 0); }
}

.section--paper .status--updated { color: #2F7A63; }
.section--paper .status--review { color: #96632B; }
.section--paper .status--archived { color: #5B7288; }

/* ---------- 索引标签 ---------- */
.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 9px;
  border: 1px solid rgba(192, 138, 78, .55);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--copper);
}

.section--paper .index-tag {
  color: #96632B;
  border-color: rgba(150, 99, 43, .45);
}

/* ---------- 条目卡 ---------- */
.card {
  position: relative;
  padding: 26px 26px 24px;
  border: 1px solid rgba(11, 27, 43, .08);
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: var(--ink-800);
  box-shadow: 0 22px 44px -34px rgba(8, 19, 31, .7);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 26px;
  width: 46px;
  height: 2px;
  background: var(--copper);
}

.section--ink .card {
  background: var(--ink-700);
  color: var(--paper);
  border-color: rgba(192, 138, 78, .26);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 30px 54px -34px rgba(8, 19, 31, .85);
}

.card__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--copper);
}

.card__title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 20px;
  color: inherit;
}

.card__meta {
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper-ink);
}

.section--ink .card__meta { color: rgba(246, 241, 231, .76); }

/* ---------- 版本条 ---------- */
.version-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.version-bar__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: #96632B;
}

.version-bar__range {
  grid-column: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: #5B7288;
}

.version-bar__note {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-ink);
}

.section--ink .version-bar { border-top-color: rgba(246, 241, 231, .16); }
.section--ink .version-bar__no { color: var(--copper-soft); }
.section--ink .version-bar__range { color: var(--slate); }
.section--ink .version-bar__note { color: rgba(246, 241, 231, .82); }

/* ---------- 折叠面板 ---------- */
.panel {
  border-top: 1px solid rgba(11, 27, 43, .16);
}

.panel__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 54px;
  padding: 12px 0;
  font-family: var(--font-head);
  font-size: 17px;
  color: var(--ink-800);
  cursor: pointer;
  list-style: none;
}

.panel__summary::-webkit-details-marker { display: none; }

.panel__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--copper);
  transition: transform .24s var(--ease);
}

.panel[open] .panel__summary::after {
  content: "–";
  transform: rotate(180deg);
}

.panel__body {
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--paper-ink);
}

/* ---------- 面包屑 ---------- */
.breadcrumb { padding: 20px 0 0; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__link {
  color: var(--slate);
  transition: color .2s var(--ease);
}

.breadcrumb__link:hover { color: var(--copper-soft); }

.breadcrumb__sep { color: rgba(143, 163, 184, .55); }

.breadcrumb__current { color: var(--paper); }

.section--paper .breadcrumb__current { color: var(--ink-800); }
.section--paper .breadcrumb__link { color: #5B7288; }
.section--paper .breadcrumb__link:hover { color: #96632B; }

/* ---------- 可复用图片容器 ---------- */
.media-frame {
  position: relative;
  aspect-ratio: var(--frame-ratio, 4 / 3);
  min-height: 180px;
  overflow: hidden;
  border: 1px solid rgba(192, 138, 78, .28);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 14% 6%, rgba(192, 138, 78, .24), transparent 62%),
    repeating-linear-gradient(135deg, rgba(246, 241, 231, .045) 0 2px, transparent 2px 9px),
    linear-gradient(160deg, #12314A 0%, #08131F 100%);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 16px 18px;
  pointer-events: none;
}

.media-frame__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(246, 241, 231, .72);
}

/* ---------- 进入视口显现 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  transition: opacity .48s var(--ease), transform .48s var(--ease);
}

.has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

[data-chapter] { scroll-margin-top: 132px; }

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  color: var(--paper);
  background: linear-gradient(180deg, #08131F 0%, #0B1B2B 100%);
  border-bottom: 1px solid rgba(192, 138, 78, .3);
  transition: box-shadow .3s var(--ease);
}

.site-header[data-condensed] {
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .9);
}

.site-header__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-header__top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 22px 0 18px;
  transition: padding .3s var(--ease);
}

.site-header[data-condensed] .site-header__top { padding: 10px 0; }

.header-aside {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.header-aside--end { justify-content: flex-end; }

.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  transition: transform .3s var(--ease);
}

.brand__lockup {
  font-family: var(--font-head);
  font-size: clamp(21px, 2.5vw, 29px);
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--paper);
  transition: font-size .3s var(--ease);
}

.site-header[data-condensed] .brand__lockup { font-size: 20px; }

.brand__descriptor {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--slate);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid rgba(192, 138, 78, .6);
  border-radius: 4px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--copper-soft);
  transition: background-color .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.header-cta:hover {
  background: var(--copper);
  border-color: var(--copper);
  color: var(--ink-900);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid rgba(246, 241, 231, .22);
  border-radius: 4px;
  color: var(--paper);
  font-size: 13px;
  letter-spacing: .12em;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: var(--copper-soft);
  transition: transform .26s var(--ease), opacity .26s var(--ease);
}

.nav-toggle__text { color: rgba(246, 241, 231, .86); }

.site-header[data-open] .nav-toggle {
  border-color: var(--copper);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

.nav-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(246, 241, 231, .1);
}

.nav-row__spacer { display: block; }

.chapter-locator {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--slate);
  white-space: nowrap;
  overflow: hidden;
}

.chapter-locator__label {
  color: rgba(143, 163, 184, .72);
}

.chapter-locator__value { color: var(--copper-soft); }

.primary-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(6px, 1.8vw, 26px);
}

.primary-nav__item { display: block; }

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 4px;
  font-size: 14px;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .72);
  transition: color .22s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  height: 1px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .28s var(--ease), background-color .28s var(--ease);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible { color: var(--paper); }

.primary-nav__link:hover::after,
.primary-nav__link:focus-visible::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] { color: var(--copper-soft); }

.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--celadon);
}

.primary-nav__foot {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: .12em;
  color: var(--slate);
}

.scroll-progress {
  height: 2px;
  background: rgba(246, 241, 231, .08);
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--copper) 0%, var(--celadon) 100%);
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  padding: clamp(48px, 6vw, 80px) 0 30px;
  background: var(--ink-900);
  color: var(--paper);
  border-top: 1px solid rgba(192, 138, 78, .34);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--gutter);
  width: 88px;
  height: 2px;
  background: var(--copper);
}

.site-footer__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) repeat(3, minmax(110px, .8fr));
  gap: clamp(26px, 3.4vw, 52px);
  padding-bottom: 34px;
}

.footer-brand { max-width: 430px; }

.footer-brand__name {
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: .14em;
  color: var(--paper);
}

.footer-brand__summary {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(246, 241, 231, .72);
}

.footer-contact {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(246, 241, 231, .12);
}

.footer-contact__line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .8);
  word-break: break-word;
}

.footer-contact__key {
  flex: 0 0 auto;
  color: var(--copper);
  letter-spacing: .2em;
}

.footer-contact__line--note {
  color: var(--slate);
  letter-spacing: .1em;
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .26em;
  color: var(--copper);
}

.footer-col__list {
  display: grid;
  gap: 2px;
  margin-top: 14px;
}

.footer-col__item { display: block; }

.footer-col__link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  letter-spacing: .05em;
  color: rgba(246, 241, 231, .74);
  transition: color .22s var(--ease), transform .22s var(--ease);
}

.footer-col__link:hover {
  color: var(--copper-soft);
  transform: translateX(3px);
}

.footer-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 22px 0;
  border-top: 1px solid rgba(246, 241, 231, .12);
  border-bottom: 1px solid rgba(246, 241, 231, .12);
}

.footer-legend__label {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--slate);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
}

.footer-bottom__legal,
.footer-bottom__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(143, 163, 184, .92);
}

.footer-bottom__mark { color: rgba(192, 138, 78, .78); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .chapter-locator { display: none; }
}

@media (max-width: 1024px) {
  .site-footer__top {
    grid-template-columns: minmax(0, 1fr) repeat(3, minmax(96px, .7fr));
    gap: 26px;
  }
  .grid--thirds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .grid--split,
  .grid--thirds { grid-template-columns: minmax(0, 1fr); }

  .site-footer__top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand {
    grid-column: 1 / -1;
    max-width: none;
  }
}

@media (max-width: 860px) {
  .site-header__top {
    grid-template-columns: 1fr auto;
    padding: 14px 0;
    gap: 12px;
  }

  .header-aside { display: none; }

  .header-aside--end {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
  }

  .brand {
    align-items: flex-start;
    text-align: left;
  }

  .brand__lockup { font-size: 20px; letter-spacing: .12em; }

  .site-header[data-condensed] .brand__lockup { font-size: 18px; }

  .brand__descriptor { font-size: 10px; letter-spacing: .22em; }

  .header-cta { display: none; }

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

  .nav-row {
    display: block;
    border-top: 0;
  }

  .nav-row__spacer { display: none; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: #0B1B2B;
    border-top: 1px solid rgba(192, 138, 78, .26);
    transition: max-height .34s var(--ease), box-shadow .34s var(--ease);
  }

  .site-header[data-open] .primary-nav {
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    box-shadow: 0 26px 50px -18px rgba(0, 0, 0, .8);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px var(--gutter) 4px;
  }

  .primary-nav__item {
    border-bottom: 1px solid rgba(246, 241, 231, .1);
  }

  .primary-nav__item:last-child { border-bottom: 0; }

  .primary-nav__link {
    width: 100%;
    min-height: 56px;
    justify-content: space-between;
    padding: 0;
    font-size: 16px;
    letter-spacing: .06em;
  }

  .primary-nav__link::after { display: none; }

  .primary-nav__link[aria-current="page"] {
    color: var(--celadon);
  }

  .primary-nav__link[aria-current="page"]::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--celadon);
    order: 2;
    margin-left: auto;
  }

  .primary-nav__foot {
    display: block;
    padding: 18px var(--gutter) 26px;
  }

  [data-chapter] { scroll-margin-top: 96px; }
}

@media (max-width: 560px) {
  .site-footer__top { grid-template-columns: minmax(0, 1fr); }

  .footer-legend { gap: 8px; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .card { padding: 22px 20px 20px; }

  .card::before { left: 20px; }

  .version-bar {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .version-bar__note {
    grid-column: 1;
    grid-row: auto;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .has-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card:hover,
  .btn:hover,
  .footer-col__link:hover { transform: none; }

  .status--updated::before { animation: none; }
}