/* ==========================================================================
   火狐体育主站 · 共享站点样式 /assets/site.css
   1 重置  2 变量  3 基础  4 无障碍  5 排版  6 布局与组件  7 头部  8 页脚  9 动效
   ========================================================================== */

/* 1. 重置 ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* 2. 变量 ---------------------------------------------------------------- */
:root {
  --ink: #0B1220;
  --ink-2: #121C2E;
  --fog: #F4F5F7;
  --white: #FFFFFF;
  --fox: #FF4A1C;
  --fox-deep: #C5320E;
  --grass: #14523B;
  --mint: #2E9E6B;
  --electric: #5B7CFF;
  --gold: #FFC83D;
  --neutral: #6B7280;
  --grass-shadow: #082B1E;

  --line-dark: rgba(244, 245, 247, .12);
  --line-light: rgba(11, 18, 32, .12);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-h1: clamp(2.9rem, 8.4vw, 8.6rem);
  --fs-h2: clamp(1.8rem, 3.4vw, 3rem);
  --fs-h3: clamp(1.15rem, 1.6vw, 1.5rem);
  --fs-body: clamp(.98rem, 1.05vw, 1.12rem);
  --fs-caption: .82rem;

  --rail-w: 88px;
  --bar-h-base: 72px;
  --gutter: clamp(1.15rem, 4vw, 3rem);
  --maxw: 1240px;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --pill: 999px;
  --shadow-soft: 0 18px 50px -28px rgba(11, 18, 32, .45);
}

/* 3. 基础 ---------------------------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--ink);
  background: var(--fog);
  padding-top: var(--bar-h-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
@media (min-width: 1024px) { body { padding-left: var(--rail-w); } }
@media (max-width: 639px) { :root { --bar-h-base: 64px; } }

::selection { background: var(--fox); color: #fff; }

/* 4. 无障碍 -------------------------------------------------------------- */
:focus-visible { outline: 2px solid var(--electric); outline-offset: 3px; border-radius: 6px; }
:focus:not(:focus-visible) { outline: none; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* 5. 排版 ---------------------------------------------------------------- */
.t-display {
  font-family: var(--font-display); font-weight: 900;
  font-size: var(--fs-h1); line-height: .96; letter-spacing: -.02em;
}
.t-h2 { font-family: var(--font-display); font-weight: 900; font-size: var(--fs-h2); line-height: 1.06; letter-spacing: -.02em; }
.t-h3 { font-family: var(--font-display); font-weight: 800; font-size: var(--fs-h3); line-height: 1.3; letter-spacing: -.01em; }
.t-serif { font-family: var(--font-serif); font-weight: 600; letter-spacing: .01em; }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; letter-spacing: -.01em; }
.lede { font-size: clamp(1.02rem, 1.3vw, 1.25rem); line-height: 1.7; color: rgba(11, 18, 32, .78); max-width: 62ch; }
.eyebrow { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--fox-deep); }
.meta-line { font-size: var(--fs-caption); color: var(--neutral); }

/* 6. 布局与通用组件 ------------------------------------------------------ */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.container--wide { max-width: 1440px; }

.section { padding-block: clamp(3.2rem, 7vw, 6.5rem); }
.section--dark { background: var(--ink); color: var(--fog); }
.section--fog { background: var(--fog); }
.section--grass { background: linear-gradient(180deg, var(--grass), var(--grass-shadow)); color: var(--fog); }
.section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 1rem 2rem; margin-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.divider { width: 56px; height: 3px; border-radius: 2px; background: var(--gold); border: 0; }
.section--dark .eyebrow { color: var(--gold); }
.section--dark .lede, .section--grass .lede { color: rgba(244, 245, 247, .78); }
.section--dark .meta-line { color: rgba(244, 245, 247, .55); }

.grid { display: grid; gap: clamp(1rem, 2vw, 1.5rem); }
.grid--2, .grid--3 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.grid--shift { grid-template-columns: 1fr; }
@media (min-width: 900px) {
  .grid--shift { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; }
  .grid--shift > *:nth-child(3n + 2) { margin-top: clamp(1rem, 3vw, 2.5rem); }
}

.card { background: var(--white); border: 1px solid var(--line-light); border-radius: var(--radius-lg); padding: clamp(1.2rem, 2.4vw, 1.9rem); box-shadow: var(--shadow-soft); }
.card-title { font-family: var(--font-display); font-weight: 800; font-size: 1.08rem; line-height: 1.35; letter-spacing: -.01em; }
.card-body { margin-top: .5rem; font-size: .95rem; color: rgba(11, 18, 32, .75); max-width: 44ch; }
.card--dark { background: var(--ink-2); border-color: var(--line-dark); color: var(--fog); }
.card--dark .card-body { color: rgba(244, 245, 247, .72); }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .72rem 1.4rem; border-radius: var(--pill);
  font-size: .92rem; font-weight: 600; line-height: 1; white-space: nowrap;
  border: 1px solid transparent;
  transition: background-color .12s ease, border-color .12s ease, color .12s ease;
}
.btn--primary { background: var(--fox); color: #fff; }
.btn--primary:hover { background: var(--fox-deep); }
.btn--ghost { border-color: rgba(11, 18, 32, .25); color: var(--ink); }
.btn--ghost:hover { border-color: var(--fox); color: var(--fox-deep); }
.btn--light { border-color: rgba(244, 245, 247, .35); color: var(--fog); }
.btn--light:hover { background: var(--fox); border-color: var(--fox); color: #fff; }
.btn--gold { background: var(--gold); color: var(--ink); }
.btn--gold:hover { background: #FFD76A; }

.tag {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .25rem .7rem; border-radius: var(--pill);
  font-size: .74rem; font-weight: 600; letter-spacing: .02em; white-space: nowrap;
  border: 1px solid transparent;
}
.tag--mint { background: rgba(46, 158, 107, .14); color: #1D6B48; border-color: rgba(46, 158, 107, .4); }
.tag--fox { background: rgba(255, 74, 28, .12); color: var(--fox-deep); border-color: rgba(255, 74, 28, .35); }
.tag--gold { background: rgba(255, 200, 61, .2); color: #8A6400; border-color: rgba(255, 200, 61, .55); }
.tag--electric { background: rgba(91, 124, 255, .14); color: #3350C9; border-color: rgba(91, 124, 255, .4); }

.breadcrumbs { padding-block: 1.1rem; border-bottom: 1px solid var(--line-light); }
.breadcrumbs-list { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; font-size: .8rem; color: var(--neutral); }
.breadcrumbs-item { display: flex; align-items: center; gap: .5rem; }
.breadcrumbs-item + .breadcrumbs-item::before { content: "/"; color: rgba(11, 18, 32, .28); }
.breadcrumbs-link { color: var(--neutral); }
.breadcrumbs-link:hover { color: var(--fox-deep); }
.breadcrumbs-current { color: var(--ink); font-weight: 600; }

.prose { max-width: 62ch; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 { font-family: var(--font-display); font-weight: 900; font-size: var(--fs-h3); line-height: 1.3; letter-spacing: -.01em; margin-top: 2.2em; }
.prose h3 { font-family: var(--font-display); font-weight: 800; font-size: 1.05rem; line-height: 1.4; margin-top: 1.8em; }
.prose p { color: rgba(11, 18, 32, .82); }
.prose a { color: var(--fox-deep); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose ul li { position: relative; padding-left: 1.1rem; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: .72em; width: 6px; height: 6px; border-radius: 2px; background: var(--fox); }
.prose ol { padding-left: 1.3rem; list-style: decimal; }
.section--dark .prose p, .section--grass .prose p { color: rgba(244, 245, 247, .78); }

.quote { margin: 2rem 0; padding: 1.4rem 1.6rem; border-left: 3px solid var(--gold); background: rgba(20, 82, 59, .06); border-radius: 0 var(--radius-md) var(--radius-md) 0; }
.quote p { font-family: var(--font-serif); font-size: clamp(1.05rem, 1.6vw, 1.35rem); line-height: 1.6; color: var(--ink); }
.quote-source { display: block; margin-top: .7rem; font-family: var(--font-body); font-size: .8rem; color: var(--neutral); }

.data-table { font-size: .9rem; }
.data-table th, .data-table td { padding: .7rem .8rem; text-align: left; border-bottom: 1px solid var(--line-light); }
.data-table th { font-size: .74rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--neutral); }
.data-table td.num { font-family: var(--font-mono); }
.section--dark .data-table th, .section--dark .data-table td { border-bottom-color: var(--line-dark); }

.stat-row { display: flex; flex-wrap: wrap; gap: clamp(1rem, 3vw, 2.5rem); }
.stat { min-width: 116px; }
.stat-value { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: clamp(1.6rem, 3vw, 2.6rem); font-weight: 600; line-height: 1; color: var(--gold); }
.stat-label { margin-top: .35rem; font-size: .78rem; letter-spacing: .02em; color: rgba(244, 245, 247, .62); }
.stat--light .stat-value { color: var(--fox-deep); }
.stat--light .stat-label { color: var(--neutral); }

.timeline { position: relative; padding-left: 1.6rem; border-left: 2px solid rgba(20, 82, 59, .45); }
.timeline-item { position: relative; padding-bottom: 1.6rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-node { position: absolute; left: calc(-1.6rem - 7px); top: .45rem; width: 12px; height: 12px; border-radius: 50%; background: var(--fox); box-shadow: 0 0 0 4px rgba(255, 74, 28, .18); }
.timeline-title { font-family: var(--font-display); font-weight: 800; font-size: 1rem; line-height: 1.4; }
.timeline-meta { font-size: .8rem; color: var(--neutral); }

.tabs { display: block; }
.tab-list { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.tab { padding: .5rem 1rem; border-radius: var(--pill); border: 1px solid rgba(244, 245, 247, .28); font-size: .85rem; font-weight: 600; color: rgba(244, 245, 247, .8); transition: background-color .12s ease, border-color .12s ease, color .12s ease; }
.tab:hover { border-color: var(--fox); }
.tab[aria-selected="true"] { background: var(--fox); border-color: var(--fox); color: #fff; }
.tabs--light .tab { border-color: var(--line-light); color: var(--neutral); }
.tabs--light .tab[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }
.tab-panel { padding-block: .4rem; }
.tab-panel[hidden] { display: none; }

.media-frame {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  background: linear-gradient(140deg, var(--ink), var(--grass-shadow));
  min-height: 220px;
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__placeholder {
  position: absolute; inset: 0;
  background: repeating-linear-gradient(135deg, rgba(244, 245, 247, .07) 0 12px, transparent 12px 24px);
}
.media-frame__caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 1.1rem 1.25rem; font-size: .8rem; color: rgba(244, 245, 247, .88);
  background: linear-gradient(180deg, transparent, rgba(11, 18, 32, .84));
}

/* 7. 头部 ---------------------------------------------------------------- */
.site-header {
  --bar-h: var(--bar-h-base);
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--bar-h); z-index: 60;
  transition: height .2s ease;
}
.site-header.is-condensed { --bar-h: 56px; }

.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 20;
  padding: .6rem 1.1rem; border-radius: var(--pill);
  background: var(--gold); color: var(--ink);
  font-size: .85rem; font-weight: 700;
  transform: translateY(-160%);
  transition: transform .18s ease;
}
.skip-link:focus { transform: translateY(0); }

.header-bar {
  position: relative; z-index: 5;
  height: var(--bar-h);
  background: var(--ink); color: var(--fog);
  border-bottom: 1px solid var(--line-dark);
  transition: height .2s ease;
}
.header-inner {
  height: 100%;
  display: flex; align-items: center;
  gap: clamp(.75rem, 2vw, 1.75rem);
  padding-inline: var(--gutter);
}
@media (min-width: 1024px) {
  .header-inner { padding-left: calc(var(--rail-w) + clamp(1rem, 2vw, 1.75rem)); }
}

.brand { display: flex; align-items: center; gap: .8rem; min-width: 0; }
.brand::before {
  content: ""; flex: none; width: 11px; height: 11px; border-radius: 3px;
  background: var(--fox); box-shadow: 0 0 0 4px rgba(255, 74, 28, .16);
}
.brand-mark {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(1rem, 1.4vw, 1.28rem); letter-spacing: -.02em;
  color: #fff; white-space: nowrap;
}
.brand-meta { display: flex; align-items: center; gap: .6rem; padding-left: .8rem; border-left: 1px solid var(--line-dark); min-width: 0; }
.brand-tagline { font-size: .76rem; color: rgba(244, 245, 247, .66); white-space: nowrap; }
.brand-domain { font-family: var(--font-mono); font-size: .7rem; color: var(--fox); white-space: nowrap; }

.header-utility { margin-left: auto; display: flex; align-items: center; gap: 1rem; min-width: 0; }
.utility-map {
  display: inline-flex; align-items: center;
  padding: .4rem 1rem; border-radius: var(--pill);
  border: 1px solid rgba(255, 74, 28, .55);
  font-size: .84rem; font-weight: 600; color: #fff; white-space: nowrap;
  transition: background-color .12s ease, border-color .12s ease;
}
.utility-map:hover { background: var(--fox); border-color: var(--fox); }
.utility-note { font-size: .72rem; color: rgba(244, 245, 247, .55); white-space: nowrap; }

.site-header.is-condensed .brand-tagline { display: none; }
.site-header.is-condensed .utility-note { display: none; }
@media (max-width: 1279px) { .utility-note { display: none; } }
@media (max-width: 767px) { .brand-meta { display: none; } }
@media (max-width: 719px) { .utility-map { display: none; } }

.nav-toggle {
  display: none; align-items: center; gap: .55rem; margin-left: auto;
  padding: .42rem .9rem; border-radius: var(--pill);
  border: 1px solid rgba(244, 245, 247, .28);
  font-size: .82rem; font-weight: 600; color: #fff;
  transition: border-color .12s ease;
}
.nav-toggle:hover { border-color: var(--fox); }
.nav-toggle-label { font-size: .82rem; }
.nav-toggle-bars { display: grid; gap: 4px; width: 15px; flex: none; }
.nav-toggle-bars span { display: block; height: 2px; border-radius: 2px; background: currentColor; transition: transform .18s ease, opacity .18s ease; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child { transform: translateY(-6px) rotate(-45deg); }

.nav-scrim {
  position: fixed; inset: 0; z-index: 4;
  background: rgba(11, 18, 32, .62);
  opacity: 0; pointer-events: none;
  transition: opacity .24s ease;
}
.nav-scrim[data-open] { opacity: 1; pointer-events: auto; }

.rail-nav {
  position: fixed; top: var(--bar-h); left: 0; bottom: 0;
  width: var(--rail-w); z-index: 3;
  display: flex; flex-direction: column; gap: .9rem;
  padding: 1.2rem .6rem 1.4rem;
  background: var(--ink); color: var(--fog);
  border-right: 1px solid var(--line-dark);
  overflow-y: auto; overscroll-behavior: contain;
}
.rail-title { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .2em; color: rgba(244, 245, 247, .4); padding-left: .6rem; }
.rail-list { display: flex; flex-direction: column; gap: .3rem; order: 2; }
.rail-item { display: block; }
.rail-link {
  display: flex; flex-direction: column; gap: .15rem;
  padding: .55rem .6rem; border-radius: 14px;
  color: rgba(244, 245, 247, .7);
  transition: background-color .2s ease, color .2s ease;
}
.rail-link:hover { background: rgba(244, 245, 247, .08); color: #fff; }
.rail-index { font-family: var(--font-mono); font-size: .62rem; letter-spacing: .06em; color: rgba(244, 245, 247, .35); }
.rail-label { font-size: .78rem; font-weight: 600; line-height: 1.25; }
.rail-link[aria-current="page"] {
  background: linear-gradient(160deg, rgba(255, 74, 28, .26), rgba(91, 124, 255, .14));
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255, 74, 28, .5);
}
.rail-link[aria-current="page"] .rail-index { color: var(--gold); }

.rail-map {
  order: 3; margin-top: auto;
  display: flex; align-items: center; gap: .4rem;
  padding: .55rem .55rem; border-radius: 14px;
  background: rgba(255, 74, 28, .14);
  border: 1px solid rgba(255, 74, 28, .4);
  font-size: .74rem; font-weight: 600; line-height: 1.2; color: #fff;
  transition: background-color .12s ease, border-color .12s ease;
}
.rail-map::before { content: ""; flex: none; width: 5px; height: 5px; border-radius: 50%; background: var(--gold); }
.rail-map:hover { background: var(--fox); border-color: var(--fox); }

.scroll-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; z-index: 6; overflow: hidden; pointer-events: none; }
.scroll-progress-bar {
  display: block; height: 100%; width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(var(--p, 0));
  background: linear-gradient(90deg, var(--fox), var(--gold), var(--mint));
  transition: transform .12s linear;
}

/* 头部 · 移动端抽屉 */
@media (max-width: 1023px) {
  .nav-scrim { z-index: 4; }
  .nav-toggle { display: inline-flex; }
  .rail-nav {
    top: var(--bar-h); z-index: 6;
    width: min(86vw, 320px);
    gap: 1rem; padding: 1rem 1rem 1.5rem;
    transform: translateX(-102%);
    visibility: hidden;
    transition: transform .24s ease, visibility .24s ease;
    box-shadow: 24px 0 60px -30px rgba(0, 0, 0, .75);
  }
  .rail-nav[data-open] { transform: none; visibility: visible; }
  .rail-title { display: none; }
  .rail-list { order: 2; gap: .35rem; }
  .rail-link { flex-direction: row; align-items: baseline; gap: .7rem; padding: .75rem .85rem; border-radius: 16px; }
  .rail-label { font-size: .98rem; }
  .rail-index { font-size: .7rem; }
  .rail-map { order: 1; margin-top: 0; font-size: .88rem; padding: .7rem .9rem; }
  html.nav-open, html.nav-open body { overflow: hidden; }
}

/* 8. 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(3.5rem, 8vw, 7rem);
  background: var(--ink);
  color: rgba(244, 245, 247, .78);
  border-top: 1px solid var(--line-dark);
}
@media (min-width: 900px) {
  .site-footer { clip-path: polygon(0 3.2vw, 100% 0, 100% 100%, 0 100%); border-top: 0; }
}
.footer-inner { width: 100%; max-width: 1280px; margin-inline: auto; padding: clamp(3.5rem, 7vw, 6rem) var(--gutter) 1.6rem; }
.footer-top { display: grid; gap: clamp(1.8rem, 4vw, 3rem); grid-template-columns: 1fr; }
@media (min-width: 700px) { .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .footer-top { grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); } }

.footer-brand { min-width: 0; }
.footer-brand-mark { font-family: var(--font-display); font-weight: 900; font-size: 1.35rem; letter-spacing: -.02em; color: #fff; }
.footer-brand-line { margin-top: .4rem; font-size: .82rem; color: rgba(244, 245, 247, .6); }
.footer-brand-line--mono { font-family: var(--font-mono); font-size: .78rem; color: var(--fox); }

.footer-col { min-width: 0; }
.footer-col-title { margin-bottom: .9rem; font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: rgba(244, 245, 247, .45); }
.footer-links { display: flex; flex-direction: column; gap: .55rem; }
.footer-link { font-size: .88rem; color: rgba(244, 245, 247, .78); transition: color .12s ease; }
.footer-link:hover { color: var(--fox); }

.footer-contact {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line-dark);
  display: grid; gap: .7rem;
}
@media (min-width: 900px) { .footer-contact { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem 2rem; } }
.footer-contact-line { display: flex; flex-wrap: wrap; align-items: baseline; gap: .55rem; font-size: .84rem; color: rgba(244, 245, 247, .72); }
.footer-contact-label { flex: none; font-family: var(--font-mono); font-size: .7rem; letter-spacing: .1em; color: var(--gold); }
.footer-contact-value { color: #fff; word-break: break-word; }
.footer-contact-note { width: 100%; font-size: .76rem; color: rgba(244, 245, 247, .5); }

.footer-bottom {
  margin-top: clamp(1.8rem, 3vw, 2.6rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-dark);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: .6rem 1.2rem;
  font-size: .76rem; color: rgba(244, 245, 247, .5);
}
.footer-icp { font-family: var(--font-mono); letter-spacing: .02em; }
.footer-note { color: rgba(244, 245, 247, .45); }

/* 9. 动效 ---------------------------------------------------------------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}
.has-js [data-reveal].is-visible { opacity: 1; transform: none; }

@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;
  }
  .has-js [data-reveal] { opacity: 1; transform: none; }
  .skip-link { transform: none; opacity: 0; }
  .skip-link:focus { opacity: 1; }
}