/* ============================================================
   银河主页 · 全站共享样式 /assets/site.css
   深空星图体系 · 侧边轨道导航 · Bento 信息板
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root {
  --abyss: #030712;
  --hull: #071226;
  --orbit: #0E2244;
  --gauge: #1B3A6B;
  --cyan: #5FE0D0;
  --silver: #E8EEF7;
  --grey: #A9B6C8;
  --gold: #F2B85B;
  --gold-soft: #FFD98A;
  --alert: #FF6B6B;

  --font-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rail-w: 15.5rem;
  --header-h: 4rem;
  --shell: 70rem;

  --radius-s: .5rem;
  --radius-m: .85rem;
  --radius-l: 1.3rem;

  --hairline: 1px solid rgba(14, 34, 68, .95);
  --dur: .26s;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background-color: var(--abyss);
  background-image:
    radial-gradient(900px 620px at 10% -10%, rgba(27, 58, 107, .40), transparent 62%),
    radial-gradient(720px 520px at 92% 4%, rgba(95, 224, 208, .08), transparent 66%),
    radial-gradient(760px 700px at 62% 104%, rgba(242, 184, 91, .055), transparent 70%);
  background-repeat: no-repeat;
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  font-weight: 400;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: var(--cyan); }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: var(--hairline); margin: 2rem 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(95, 224, 208, .28); color: #fff; }

/* ---------- 3. 中文排版 ---------- */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .1em;
  color: var(--silver);
}
h1 { font-size: clamp(2rem, 5.6vw, 3.4rem); letter-spacing: .12em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.15rem); letter-spacing: .1em; }
h3 { font-size: clamp(1.12rem, 2.2vw, 1.4rem); letter-spacing: .08em; }
h4 { font-size: 1.02rem; letter-spacing: .08em; font-weight: 600; }
p { max-width: 68ch; }
strong, b { font-weight: 600; color: #fff; }
small { font-size: .82rem; color: var(--grey); }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--grey); }
.lede { font-size: clamp(1.02rem, 1.6vw, 1.18rem); color: var(--grey); line-height: 1.9; }

/* ---------- 4. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(1.15rem, 4.5vw, 3.25rem);
}

.stack { display: grid; gap: clamp(1rem, 2vw, 1.5rem); }
.grid-2 { display: grid; gap: clamp(1rem, 2vw, 1.75rem); grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: clamp(1rem, 2vw, 1.75rem); grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.bento {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1200px) {
  .bento { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .bento__cell--wide { grid-column: span 2; }
  .bento__cell--tall { grid-row: span 2; }
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(95, 224, 208, .45), rgba(14, 34, 68, .9) 42%, transparent);
  margin: clamp(2rem, 5vw, 3.25rem) 0;
}

/* ---------- 5. 章节首部与标签 ---------- */
.section-head { display: grid; gap: .75rem; margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  max-width: none;
}
.eyebrow::before {
  content: "";
  width: 1.4rem;
  height: 1px;
  background: currentColor;
  opacity: .65;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.35rem;
  border-radius: 999px;
  border: 1px solid rgba(95, 224, 208, .38);
  background: rgba(27, 58, 107, .32);
  color: var(--silver);
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.btn:hover {
  background: rgba(27, 58, 107, .62);
  border-color: var(--cyan);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(95, 224, 208, .18), 0 12px 28px -18px rgba(95, 224, 208, .7);
}
.btn--gold {
  background: linear-gradient(135deg, rgba(242, 184, 91, .20), rgba(242, 184, 91, .05));
  border-color: rgba(242, 184, 91, .55);
  color: var(--gold-soft);
}
.btn--gold:hover {
  background: linear-gradient(135deg, rgba(242, 184, 91, .34), rgba(242, 184, 91, .14));
  border-color: var(--gold);
  color: #fff6e4;
  box-shadow: 0 0 0 1px rgba(242, 184, 91, .2), 0 12px 28px -18px rgba(242, 184, 91, .8);
}
.btn--ghost {
  background: transparent;
  border-color: rgba(169, 182, 200, .34);
  color: var(--grey);
}
.btn--ghost:hover { background: rgba(169, 182, 200, .1); border-color: var(--grey); color: var(--silver); }
.btn--block { width: 100%; }

/* ---------- 7. 卡片与媒体 ---------- */
.card {
  position: relative;
  padding: clamp(1.3rem, 2.4vw, 2rem);
  border-radius: var(--radius-l);
  border: var(--hairline);
  background: linear-gradient(160deg, rgba(7, 18, 38, .94), rgba(5, 12, 26, .96));
  box-shadow: 0 20px 42px -32px rgba(0, 0, 0, .95);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(420px 200px at 92% -10%, rgba(95, 224, 208, .10), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.card:hover { border-color: rgba(95, 224, 208, .34); transform: translateY(-2px); }
.card:hover::after { opacity: 1; }

.card--focus {
  background: linear-gradient(155deg, rgba(14, 34, 68, .88), rgba(7, 18, 38, .96) 56%, rgba(8, 22, 44, .9));
  border-color: rgba(95, 224, 208, .3);
}
.card--gold { border-color: rgba(242, 184, 91, .38); }
.card--gold::after { background: radial-gradient(420px 200px at 92% -10%, rgba(242, 184, 91, .14), transparent 70%); }

.card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--cyan);
  opacity: .75;
  margin-bottom: .85rem;
}
.card__title { margin-bottom: .6rem; }
.card__text { font-size: .95rem; color: var(--grey); max-width: 62ch; }

.media {
  display: block;
  position: relative;
  width: 100%;
  border-radius: var(--radius-m);
  border: var(--hairline);
  overflow: hidden;
  background: linear-gradient(150deg, #061024, #0b1a33 46%, #071527);
}
.media > img,
.media > svg,
.media > video { width: 100%; height: 100%; object-fit: cover; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media__caption {
  margin-top: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--grey);
  text-transform: uppercase;
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { font-size: .82rem; color: var(--grey); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; list-style: none; margin: 0; padding: 0; }
.breadcrumb li { display: inline-flex; align-items: center; gap: .5rem; }
.breadcrumb li + li::before { content: "/"; color: rgba(169, 182, 200, .4); }
.breadcrumb a {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumb a:hover { color: var(--cyan); border-bottom-color: rgba(95, 224, 208, .5); }
.breadcrumb [aria-current="page"] { color: var(--silver); }

/* ---------- 9. 头部 · 侧边轨道 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background: rgba(3, 7, 18, .97);
  border-bottom: var(--hairline);
}

.skip-link {
  position: absolute;
  left: .75rem;
  top: .5rem;
  z-index: 90;
  padding: .55rem .95rem;
  border-radius: var(--radius-s);
  background: var(--cyan);
  color: #02141a;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  white-space: nowrap;
  clip-path: inset(50%);
}
.skip-link:focus,
.skip-link:focus-visible { clip-path: none; }

.orbital-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  min-height: var(--header-h);
  padding-inline: clamp(1rem, 4.5vw, 1.5rem);
}

.brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  text-decoration: none;
  color: var(--silver);
  min-width: 0;
}
.brand__mark {
  position: relative;
  flex: none;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  border: 1px solid rgba(95, 224, 208, .55);
  background: radial-gradient(circle at 32% 30%, rgba(95, 224, 208, .3), transparent 64%);
}
.brand__mark::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 0 0 10px rgba(255, 217, 138, .9);
  transform: translate(-50%, -50%);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  border: 1px dashed rgba(169, 182, 200, .34);
}
.brand__text { display: flex; flex-direction: column; min-width: 0; }
.brand__name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .2em;
  line-height: 1.3;
  white-space: nowrap;
}
.brand__tag {
  display: none;
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--grey);
  line-height: 1.5;
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .5rem .7rem;
  border-radius: var(--radius-s);
  border: 1px solid rgba(14, 34, 68, .95);
  background: rgba(7, 18, 38, .7);
  color: var(--grey);
  font-size: .78rem;
  letter-spacing: .14em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: rgba(95, 224, 208, .45); color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 5px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:first-child { transform: translateY(3.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.nav-toggle__label { text-transform: uppercase; }

/* 轨道导航 · 移动端抽屉 */
.rail {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 55;
  padding: 1.1rem 1.25rem 1.75rem;
  background: rgba(5, 11, 28, .99);
  border-bottom: var(--hairline);
  box-shadow: 0 30px 54px -30px rgba(0, 0, 0, .95);
  max-height: calc(100dvh - var(--header-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-.6rem);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
}
.site-header[data-open] .rail { opacity: 1; visibility: visible; transform: translateY(0); }

.rail__eyebrow {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: rgba(169, 182, 200, .7);
  padding-left: .8rem;
  margin-bottom: .85rem;
  max-width: none;
}

.rail__list { display: grid; gap: .25rem; }

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: .95rem;
  padding: .78rem .85rem;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  color: var(--grey);
  font-size: 1rem;
  letter-spacing: .08em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.rail__link::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 0;
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(95, 224, 208, .85);
  transform: translateY(-50%);
  transition: height var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.rail__link:hover { color: var(--silver); background: rgba(27, 58, 107, .34); }
.rail__link:hover::after { height: 48%; }
.rail__link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(27, 58, 107, .46);
  border-color: rgba(95, 224, 208, .26);
}
.rail__link[aria-current="page"]::after { height: 68%; background: var(--cyan); }

.rail__idx {
  flex: none;
  min-width: 1.9rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--cyan);
  opacity: .55;
  transition: opacity var(--dur) var(--ease);
}
.rail__link:hover .rail__idx,
.rail__link[aria-current="page"] .rail__idx { opacity: 1; }
.rail__label { min-width: 0; }

.orbital-meta { display: none; }

/* 联系泊位 · 仅桌面 */
.berth { display: none; }

/* 返回页首 */
.to-top {
  position: fixed;
  right: clamp(.85rem, 2.2vw, 1.5rem);
  bottom: clamp(.85rem, 2.2vw, 1.5rem);
  z-index: 58;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 50%;
  border: 1px solid rgba(95, 224, 208, .4);
  background: rgba(7, 18, 38, .92);
  color: var(--cyan);
  font-size: 1rem;
  line-height: 1;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.to-top[hidden] { display: none; }
.to-top:hover { border-color: var(--cyan); color: #fff; transform: translateY(-2px); }

/* ---------- 10. 桌面端侧边轨道布局 ---------- */
@media (min-width: 480px) {
  .brand__tag { display: block; }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  html { scroll-padding-top: 6rem; }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail-w);
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 2.25rem;
    padding: 2.5rem 1.4rem 2rem;
    background: linear-gradient(180deg, #061024 0%, #030712 54%, #04101f 100%);
    border-right: var(--hairline);
    border-bottom: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .site-header::before {
    content: "";
    position: absolute;
    top: 0;
    right: -1px;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(95, 224, 208, .5) 14%, rgba(242, 184, 91, .3) 74%, transparent);
    pointer-events: none;
  }

  .orbital-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.15rem;
    width: 100%;
    min-height: 0;
    padding-inline: 0;
  }

  .brand { flex-direction: column; align-items: flex-start; gap: .6rem; }
  .brand__mark { width: 2.25rem; height: 2.25rem; }
  .brand__name { font-size: 1.06rem; }

  .nav-toggle { display: none; }

  .rail {
    position: static;
    flex: 0 0 auto;
    width: 100%;
    padding: 0;
    max-height: none;
    overflow: visible;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: none;
    border: 0;
    box-shadow: none;
  }
  .rail__eyebrow { padding-left: .8rem; margin-bottom: 1rem; }
  .rail__list { gap: .15rem; }
  .rail__link { font-size: .95rem; padding: .7rem .8rem; }

  .orbital-meta {
    display: grid;
    gap: .55rem;
    margin-top: auto;
    padding: 1.1rem 0 0;
    border-top: 1px solid rgba(14, 34, 68, .95);
  }
  .orbital-meta__eyebrow {
    font-family: var(--font-mono);
    font-size: .66rem;
    letter-spacing: .26em;
    color: var(--gold);
    max-width: none;
  }
  .orbital-meta__text {
    font-size: .8rem;
    line-height: 1.7;
    color: var(--grey);
    max-width: none;
    margin-bottom: .35rem;
  }

  .berth {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    position: fixed;
    right: 0;
    bottom: 4.75rem;
    z-index: 56;
    padding: .95rem .78rem;
    border: 1px solid rgba(242, 184, 91, .42);
    border-right: 0;
    border-radius: .7rem 0 0 .7rem;
    background: rgba(7, 18, 38, .94);
    color: var(--gold-soft);
    font-size: .78rem;
    letter-spacing: .16em;
    text-decoration: none;
    writing-mode: vertical-rl;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .berth:hover { color: #fff6e4; border-color: var(--gold); transform: translateX(-2px); }
  .berth__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 10px rgba(242, 184, 91, .9);
  }

  .to-top { right: 1.5rem; bottom: 2rem; }
}

@media (min-width: 1440px) {
  :root { --rail-w: 17rem; }
  .rail__link { font-size: 1rem; }
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(4rem, 10vw, 8rem);
  padding: clamp(2.5rem, 5vw, 4.25rem) clamp(1.15rem, 4.5vw, 3.25rem) 2.25rem;
  background:
    radial-gradient(760px 340px at 84% 0%, rgba(95, 224, 208, .07), transparent 68%),
    radial-gradient(560px 320px at 8% 100%, rgba(242, 184, 91, .05), transparent 70%),
    linear-gradient(180deg, rgba(7, 18, 38, .8), rgba(3, 7, 18, .98));
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(95, 224, 208, .55) 20%, rgba(242, 184, 91, .45) 64%, transparent);
}

.footer-grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  grid-template-columns: 1fr;
  max-width: var(--shell);
  margin-inline: auto;
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1100px) {
  .footer-grid { grid-template-columns: 1.55fr .85fr .9fr 1.25fr; }
}

.footer-brand { display: grid; gap: .5rem; align-content: start; }
.footer-brand__name {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--silver);
  max-width: none;
  line-height: 1.4;
}
.footer-brand__tag {
  font-size: .84rem;
  letter-spacing: .1em;
  color: var(--cyan);
  max-width: none;
}
.footer-brand__note {
  margin-top: .35rem;
  font-size: .88rem;
  line-height: 1.85;
  color: var(--grey);
  max-width: 34ch;
}

.footer-col { display: grid; gap: .9rem; align-content: start; }
.footer-col__title {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(169, 182, 200, .78);
}
.footer-col__list { display: grid; gap: .55rem; font-size: .9rem; }
.footer-col__list a {
  display: inline-block;
  color: var(--grey);
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-col__list a:hover { color: var(--cyan); transform: translateX(3px); }
.footer-col__list--plain { color: var(--grey); font-size: .86rem; }
.footer-col__list--plain li { line-height: 1.7; }
.footer-k {
  display: block;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--cyan);
  opacity: .8;
  margin-bottom: .1rem;
}

.footer-base {
  max-width: var(--shell);
  margin: clamp(2.25rem, 5vw, 3.25rem) auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(14, 34, 68, .9);
  display: grid;
  gap: .5rem;
  font-size: .8rem;
  color: var(--grey);
}
.footer-base__copy { max-width: none; }
.footer-base__icp { font-family: var(--font-mono); letter-spacing: .1em; color: rgba(169, 182, 200, .8); max-width: none; }
.footer-base__note { max-width: none; color: rgba(169, 182, 200, .72); line-height: 1.75; }

@media (min-width: 860px) {
  .footer-base {
    grid-template-columns: auto auto 1fr;
    align-items: baseline;
    gap: 0 1.75rem;
  }
  .footer-base__note { text-align: right; }
}

/* ---------- 12. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .62s var(--ease), transform .62s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 13. 可访问性降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0ms !important;
  }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .btn:hover, .card:hover, .footer-col__list a:hover, .to-top:hover, .berth:hover { transform: none; }
  .rail__link:hover::after { height: 0; }
}