/* ============================================================
   立博中文站 · /assets/site.css
   共享外壳样式：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 152px;
}
body {
  margin: 0;
  min-height: 100vh;
  background-color: #060D18;
  color: #F2F5FA;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.85;
  font-weight: 400;
  letter-spacing: .01em;
  background-image:
    radial-gradient(1200px 520px at 76% -12%, rgba(217,180,95,.09), transparent 60%),
    repeating-linear-gradient(114deg, rgba(242,245,250,.015) 0 1px, transparent 1px 8px);
}
h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: #D9B45F; text-decoration: none; }
a:hover { color: #F1DFA8; }
main { display: block; }
:focus-visible { outline: 2px solid #F1DFA8; outline-offset: 3px; border-radius: 2px; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #060D18;
  --ink-800: #0B1524;
  --ink-700: #122036;
  --gold-400: #D9B45F;
  --gold-200: #F1DFA8;
  --red-600: #C8102E;
  --mist-100: #F2F5FA;
  --slate-300: #A7B3C6;
  --bronze-700: #8C6A2A;
  --gold-050: #FFE9B0;

  --rule: 1px solid rgba(140,106,42,.45);
  --hair: 1px solid rgba(167,179,198,.14);

  --font-head: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", "SFMono-Regular", Consolas, "Courier New", monospace;

  --shell-max: 1280px;
  --rail-w: 220px;
  --ease: cubic-bezier(.2,.7,.3,1);
}

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3, h4, .crest__name, .foot-brand, .band__title, .sec__title, .card__title {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
  color: var(--mist-100);
}
h1 { font-size: clamp(30px, 4.2vw, 48px); }
h2 { font-size: clamp(24px, 3vw, 36px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
p { max-width: 72ch; }

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: #D9B45F;
  color: #060D18;
  font-weight: 700;
  border-radius: 2px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; color: #060D18; }

/* ---------- 5. 页头：居中刊头 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, #08111F 0%, #060D18 100%);
  border-bottom: 1px solid rgba(140,106,42,.5);
  box-shadow: 0 14px 30px -26px rgba(0,0,0,.95);
}
.masthead::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, #FFE9B0, rgba(200,16,46,.5), transparent);
  opacity: .5;
}
.masthead__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 18px 28px 8px;
}
.masthead__crest { display: flex; align-items: center; gap: 20px; }
.crest__line {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(217,180,95,.7), transparent);
}
.crest__brand { display: block; text-align: center; padding: 0 8px; }
.crest__name {
  display: block;
  font-size: clamp(24px, 3.2vw, 38px);
  letter-spacing: .06em;
  transition: font-size .25s var(--ease);
}
.crest__sub {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--slate-300);
}
.masthead__micro {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--slate-300);
  max-width: none;
}
.micro__dot { color: var(--bronze-700); }
.masthead__bar {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 28px 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.mastnav__list { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; }
.mastnav__link {
  position: relative;
  display: inline-block;
  padding: 11px 16px 15px;
  font-size: 15px;
  color: var(--slate-300);
  transition: color .2s var(--ease);
}
.mastnav__link::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 8px;
  height: 1px;
  background: var(--gold-400);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}
.mastnav__link:hover { color: var(--gold-200); }
.mastnav__link:hover::after { transform: scaleX(1); }
.mastnav__link[aria-current="page"] { color: var(--gold-400); font-weight: 600; }
.mastnav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav-toggle, .rail-toggle {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-400);
  border: 1px solid rgba(217,180,95,.45);
  border-radius: 2px;
  padding: 8px 14px;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.nav-toggle:hover, .rail-toggle:hover { background: rgba(217,180,95,.12); color: var(--gold-200); }

/* 滚动收窄 */
.masthead.is-condensed .masthead__micro { display: none; }
.masthead.is-condensed .masthead__inner { padding: 10px 28px 2px; }
.masthead.is-condensed .crest__name { font-size: clamp(18px, 2.2vw, 24px); }
.masthead.is-condensed .crest__sub { display: none; }

/* ---------- 6. 页脚 ---------- */
.site-foot {
  margin-top: 96px;
  border-top: 1px solid rgba(140,106,42,.5);
  background: linear-gradient(180deg, #060D18 0%, #04090F 100%);
}
.site-foot__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 54px 28px 30px;
}
.site-foot__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
  padding-bottom: 22px;
  border-bottom: var(--hair);
}
.foot-brand { font-size: 22px; letter-spacing: .06em; }
.foot-note { font-size: 13.5px; color: var(--slate-300); max-width: 52ch; }
.foot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 30px;
  padding: 30px 0 26px;
}
.foot-col__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .2em;
  color: var(--gold-400);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(140,106,42,.35);
}
.foot-list li { margin-bottom: 8px; }
.foot-link {
  display: inline-block;
  font-size: 14px;
  color: var(--slate-300);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.foot-link:hover {
  color: var(--gold-200);
  border-bottom-color: rgba(217,180,95,.6);
  transform: translateX(2px);
}
.foot-address { font-style: normal; }
.foot-address p {
  font-size: 13.5px;
  color: var(--slate-300);
  line-height: 1.9;
  max-width: 30ch;
}
.foot-cta { margin-top: 12px; }
.site-foot__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 20px;
  border-top: var(--hair);
}
.legal__line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate-300);
  max-width: none;
}

/* ---------- 7. 容器与页面骨架 ---------- */
.wrap { max-width: var(--shell-max); margin: 0 auto; padding: 0 28px; }
.shell {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 36px 28px 0;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
.shell__main { min-width: 0; }

/* ---------- 8. 左侧分类索引 ---------- */
.rail {
  position: sticky;
  top: 152px;
  align-self: start;
  border-left: var(--rule);
  padding: 4px 0 12px;
}
.rail__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  line-height: 1.7;
  color: var(--slate-300);
  padding: 0 12px 12px 14px;
  max-width: none;
}
.rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .22em;
  color: var(--gold-400);
  padding: 8px 12px 8px 14px;
  border-top: 1px solid rgba(140,106,42,.35);
  border-bottom: 1px solid rgba(140,106,42,.35);
  background: rgba(18,32,54,.6);
}
.rail__list { display: flex; flex-direction: column; padding: 6px 0 0; }
.rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px 10px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--slate-300);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.rail__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: rgba(217,180,95,.72);
  flex: 0 0 auto;
}
.rail__link:hover { color: var(--gold-200); background: rgba(217,180,95,.06); }
.rail__link.is-active,
.rail__link[aria-current="true"] {
  color: var(--gold-400);
  border-left-color: var(--red-600);
  background: linear-gradient(90deg, rgba(200,16,46,.14), transparent 90%);
}
.rail__link.is-active .rail__code,
.rail__link[aria-current="true"] .rail__code { color: var(--gold-200); }

/* ---------- 9. 页段 / 主题带 ---------- */
.sec { margin: 0 0 56px; }
.sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: var(--rule);
}
.sec__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold-400);
}
.sec__title { font-size: clamp(22px, 2.4vw, 30px); }

.band {
  position: relative;
  margin: 0 0 30px;
  padding: 26px 28px 28px;
  border: var(--rule);
  border-left: 3px solid var(--gold-400);
  border-radius: 2px;
  background:
    linear-gradient(100deg, #122036 0%, #0B1524 60%, rgba(200,16,46,.10) 100%);
  box-shadow: 0 18px 34px -30px rgba(0,0,0,1);
}
.band__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold-400);
  margin-bottom: 10px;
}
.band__title { font-size: clamp(26px, 3.6vw, 40px); }
.band__lead {
  margin-top: 12px;
  font-size: 16px;
  color: var(--slate-300);
  max-width: 72ch;
}

/* ---------- 10. 栅格与卡片 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0,1fr));
  gap: 18px;
}
.grid > * { grid-column: 1 / -1; }
@media (min-width: 720px) {
  .grid > .col-3 { grid-column: span 3; }
  .grid > .col-4 { grid-column: span 4; }
  .grid > .col-5 { grid-column: span 5; }
  .grid > .col-6 { grid-column: span 6; }
  .grid > .col-7 { grid-column: span 7; }
  .grid > .col-8 { grid-column: span 8; }
  .grid > .col-12 { grid-column: span 12; }
}
.card {
  position: relative;
  padding: 22px 22px 20px;
  border: var(--hair);
  border-radius: 2px;
  background: linear-gradient(155deg, #0B1524 0%, rgba(6,13,24,.96) 100%);
  box-shadow: inset 0 1px 0 rgba(255,233,176,.05), 0 16px 30px -28px rgba(0,0,0,.95);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(217,180,95,.55);
  box-shadow: inset 0 1px 0 rgba(255,233,176,.08), 0 20px 36px -24px rgba(0,0,0,1);
}
.card__code {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: rgba(217,180,95,.78);
}
.card__title { font-size: 22px; }
.card__desc { margin-top: 10px; font-size: 15px; color: var(--slate-300); max-width: 72ch; }
.card__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid rgba(140,106,42,.35);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate-300);
}
.card__more { color: var(--gold-400); font-size: 13px; }
.card__more::after {
  content: "→";
  display: inline-block;
  margin-left: 8px;
  transition: transform .2s var(--ease);
}
.card:hover .card__more::after { transform: translateX(4px); }

/* ---------- 11. 数字 ---------- */
.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
  color: var(--gold-400);
  line-height: 1;
}
.num--xl { font-size: clamp(52px, 7vw, 96px); }
.num--lg { font-size: clamp(36px, 4.4vw, 64px); }
.num--md { font-size: clamp(24px, 2.6vw, 40px); }
.num__unit {
  margin-left: .5ch;
  font-size: .42em;
  letter-spacing: .1em;
  color: var(--slate-300);
}

/* ---------- 12. 正文容器 ---------- */
.prose { max-width: 72ch; }
.prose p { margin: 0 0 1.15em; color: rgba(242,245,250,.86); }
.prose h2, .prose h3 { margin: 1.5em 0 .55em; }
.prose ul, .prose ol { margin: 0 0 1.2em; }
.prose li {
  position: relative;
  padding-left: 20px;
  margin-bottom: .5em;
  color: rgba(242,245,250,.86);
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .8em;
  width: 9px;
  height: 1px;
  background: var(--bronze-700);
}

/* ---------- 13. 面包屑 / 标签 / 按钮 ---------- */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate-300);
}
.crumb__item { color: var(--slate-300); }
.crumb__item a { color: var(--slate-300); }
.crumb__item a:hover { color: var(--gold-200); }
.crumb__item[aria-current="page"] { color: var(--gold-400); }
.crumb__sep { color: var(--bronze-700); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid rgba(200,16,46,.62);
  border-radius: 2px;
  background: rgba(200,16,46,.16);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold-200);
}
.tag--gold { background: rgba(217,180,95,.14); border-color: rgba(217,180,95,.6); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid rgba(217,180,95,.55);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(217,180,95,.10), rgba(217,180,95,.03));
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--gold-400);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover {
  color: var(--ink-900);
  background: var(--gold-400);
  border-color: var(--gold-400);
  transform: translateY(-2px);
}
.btn--gold {
  background: linear-gradient(180deg, #D9B45F, #C79E47);
  border-color: var(--gold-400);
  color: var(--ink-900);
  box-shadow: 0 12px 26px -20px rgba(217,180,95,.9);
}
.btn--gold:hover {
  background: linear-gradient(180deg, #F1DFA8, #D9B45F);
  border-color: var(--gold-200);
  color: var(--ink-900);
}
.btn--ghost {
  background: transparent;
  border-color: rgba(167,179,198,.35);
  color: var(--mist-100);
}
.btn--ghost:hover {
  background: rgba(167,179,198,.12);
  border-color: var(--slate-300);
  color: var(--mist-100);
}

/* ---------- 14. 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  border: var(--rule);
  border-radius: 2px;
  background: rgba(11,21,36,.72);
  -webkit-overflow-scrolling: touch;
}
.cmp {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 15px;
}
.cmp th, .cmp td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(140,106,42,.32);
  vertical-align: top;
}
.cmp thead th {
  background: #122036;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-400);
}
.cmp tbody tr:hover { background: rgba(217,180,95,.05); }
.cmp td:first-child { color: var(--mist-100); font-weight: 600; }
.cmp .num { white-space: nowrap; }

/* ---------- 15. 图片容器（供页面阶段放图） ---------- */
.media {
  margin: 0;
  border: var(--rule);
  border-radius: 2px;
  overflow: hidden;
  background: #0B1524;
}
.media__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% 112%, rgba(217,180,95,.16), transparent 62%),
    linear-gradient(180deg, rgba(18,32,54,.95), rgba(6,13,24,.95));
}
.media__frame img,
.media__frame picture,
.media__frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, rgba(140,106,42,.16) 0 1px, transparent 1px 48px);
}
.media__cap {
  padding: 10px 14px;
  border-top: 1px solid rgba(140,106,42,.35);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate-300);
  max-width: none;
}
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 4 / 5; }

/* ---------- 16. 入场与翻页光效 ---------- */
html:not(.js) [data-reveal] { opacity: 1; transform: none; }
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@keyframes libo-page-flip {
  0%   { opacity: 0; transform: translateY(-100%); }
  35%  { opacity: .95; }
  100% { opacity: 0; transform: translateY(100%); }
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 120;
  pointer-events: none;
  background: linear-gradient(180deg,
    transparent 0%,
    rgba(255,233,176,.08) 42%,
    rgba(217,180,95,.20) 50%,
    rgba(255,233,176,.08) 58%,
    transparent 100%);
  animation: libo-page-flip 480ms var(--ease) 1 both;
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .shell { grid-template-columns: 180px minmax(0,1fr); gap: 28px; }
  :root { --rail-w: 180px; }
}
@media (max-width: 960px) {
  html { scroll-padding-top: 120px; }
  .masthead__bar { position: static; justify-content: space-between; padding: 0 20px 10px; }
  .masthead__inner { padding: 14px 20px 6px; }
  .nav-toggle, .rail-toggle { display: inline-block; }
  .mastnav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    background: #0B1524;
    border-top: 1px solid rgba(140,106,42,.45);
    border-bottom: 1px solid rgba(140,106,42,.45);
    box-shadow: 0 24px 40px -28px rgba(0,0,0,1);
    transition: max-height .3s var(--ease);
  }
  .mastnav[data-open] { max-height: 72vh; overflow-y: auto; }
  html:not(.js) .mastnav { position: static; max-height: none; }
  .mastnav__list { flex-direction: column; padding: 6px 0; }
  .mastnav__link {
    display: block;
    padding: 14px 20px;
    border-bottom: 1px solid rgba(167,179,198,.10);
  }
  .mastnav__link::after { display: none; }
  .mastnav__link[aria-current="page"] {
    background: rgba(200,16,46,.13);
    box-shadow: inset 3px 0 0 var(--red-600);
  }

  .shell {
    grid-template-columns: minmax(0,1fr);
    gap: 22px;
    padding: 20px 20px 0;
  }
  .rail {
    position: static;
    border-left: 0;
    border-top: var(--rule);
    border-bottom: var(--rule);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height .3s var(--ease), opacity .2s var(--ease);
  }
  .rail[data-open] { max-height: 64vh; overflow-y: auto; opacity: 1; padding-bottom: 10px; }
  html:not(.js) .rail { max-height: none; opacity: 1; }
  .rail__hint { padding: 12px 12px 10px; }
  .rail__list {
    flex-direction: row;
    overflow-x: auto;
    padding: 6px 6px 0;
    -webkit-overflow-scrolling: touch;
  }
  .rail__link {
    flex: 0 0 auto;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 10px 14px;
    margin-left: 0;
  }
  .rail__link:hover { background: rgba(217,180,95,.06); }
  .rail__link.is-active,
  .rail__link[aria-current="true"] {
    background: none;
    border-left-color: transparent;
    border-bottom-color: var(--red-600);
    color: var(--gold-400);
  }

  .foot-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 26px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .masthead__micro { font-size: 10.5px; gap: 8px; }
  .foot-grid { grid-template-columns: minmax(0,1fr); gap: 22px; }
  .site-foot { margin-top: 64px; }
  .site-foot__inner { padding: 40px 20px 24px; }
  .wrap { padding: 0 20px; }
  .band { padding: 20px 20px 22px; }
  .card { padding: 18px 18px 16px; }
  .site-foot__legal { flex-direction: column; }
}

/* ---------- 18. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  body::after { display: none; }
  .card:hover, .btn:hover, .foot-link:hover { transform: none; }
}