/* =========================================================
   爱体育主站 · 共享样式 /assets/site.css
   奶油纸底 + 品牌蓝结构 + 荧光青数据 + 暖橙提醒
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --cream:#F4EFE6;
  --ink:#1B1712;
  --brand:#1B4C8C;
  --night:#0E2A47;
  --cyan:#2FE0C8;
  --cyan-ink:#0B7C6E;
  --orange:#E8722C;
  --orange-ink:#A8491A;
  --red:#C2402A;
  --red-ink:#9B3221;
  --grey:#8C8578;
  --ice:#DCE7F2;
  --white:#FFFFFF;

  --line:rgba(140,133,120,.30);
  --line-soft:rgba(140,133,120,.16);
  --line-strong:rgba(140,133,120,.52);

  --shell:1280px;
  --gutter:clamp(1.125rem,4vw,3rem);
  --announce-h:2.125rem;

  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;

  --shadow-pod:0 20px 44px -32px rgba(14,42,71,.55);
  --shadow-pod-strong:0 14px 30px -18px rgba(14,42,71,.45);

  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-display:"Arial Narrow","Helvetica Neue",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","IBM Plex Mono",Consolas,monospace;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
h1,h2,h3,h4{line-height:1.15;font-weight:700}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
strong{font-weight:700}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:6px}
.announce :focus-visible,.site-footer :focus-visible{outline-color:var(--cyan)}

/* ---------- 3. 跳至内容 ---------- */
.skip-link{
  position:fixed;
  top:.6rem;
  left:50%;
  transform:translate(-50%,-200%);
  z-index:120;
  padding:.6rem 1.2rem;
  border-radius:var(--radius-pill);
  background:var(--night);
  color:var(--cream);
  font-size:.875rem;
  font-weight:600;
  text-decoration:none;
  transition:transform .22s ease;
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 4. 页头 ---------- */
.site-header{
  position:sticky;
  top:calc(var(--announce-h) * -1);
  z-index:60;
}

.announce{
  height:var(--announce-h);
  overflow:hidden;
  background:var(--night);
  color:rgba(244,239,230,.82);
}
.announce__inner{
  display:flex;
  align-items:center;
  gap:.75rem;
  height:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.announce__tag{
  flex:none;
  padding:.1rem .5rem;
  border-radius:var(--radius-pill);
  border:1px solid rgba(232,114,44,.5);
  background:rgba(232,114,44,.2);
  color:var(--orange);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  line-height:1.5;
}
.announce__text{
  flex:1 1 auto;
  min-width:0;
  overflow:hidden;
  white-space:nowrap;
  text-overflow:ellipsis;
  font-size:.8125rem;
  line-height:1.4;
}
.announce__link{
  flex:none;
  color:var(--cyan);
  font-size:.8125rem;
  font-weight:600;
  text-decoration:none;
  border-bottom:1px solid rgba(47,224,200,.45);
  line-height:1.4;
}
.announce__link:hover{color:#8BF5E6;border-bottom-color:currentColor}

.nav-shell{
  padding:.6rem var(--gutter) .75rem;
  background:linear-gradient(180deg,rgba(244,239,230,.97),rgba(244,239,230,.88) 72%,rgba(244,239,230,.62));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.nav-pod{
  display:flex;
  align-items:center;
  gap:.75rem;
  max-width:var(--shell);
  margin-inline:auto;
  padding:.45rem .55rem .45rem .9rem;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--white);
  box-shadow:var(--shadow-pod);
}
.site-header[data-scrolled] .nav-pod{
  border-color:rgba(27,76,140,.24);
  box-shadow:var(--shadow-pod-strong);
}
.site-header[data-scrolled] .brand__mark{transform:scale(.92)}
.site-header[data-scrolled] .brand__mark::after{transform:scale(1.15)}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  flex:none;
  text-decoration:none;
  color:var(--ink);
}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:2.25rem;
  height:2.25rem;
  border-radius:50%;
  background:var(--brand);
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.06em;
  transition:transform .3s ease;
}
.brand__mark::after{
  content:"";
  position:absolute;
  right:1px;
  bottom:1px;
  width:.5rem;
  height:.5rem;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 2px var(--white);
  transition:transform .3s ease;
}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-size:1rem;font-weight:700;letter-spacing:.1em}
.brand__line{font-family:var(--font-mono);font-size:.625rem;letter-spacing:.1em;color:var(--grey)}

.nav{margin-inline:auto}
.nav__list{display:flex;align-items:center;gap:.1rem}
.nav__link{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.45rem .68rem;
  border-radius:var(--radius-pill);
  font-size:.875rem;
  color:rgba(27,23,18,.78);
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease;
}
.nav__link:hover{background:var(--ice);color:var(--night)}
.nav__dot{
  width:.45rem;
  height:.45rem;
  flex:none;
  border-radius:50%;
  background:var(--cyan);
  opacity:0;
  transform:scale(.4);
  transition:opacity .2s ease,transform .2s ease,box-shadow .2s ease;
}
.nav__link:hover .nav__dot{opacity:.55;transform:scale(1)}
.nav__link[aria-current="page"]{
  background:var(--ice);
  color:var(--night);
  font-weight:700;
}
.nav__link[aria-current="page"] .nav__dot{
  opacity:1;
  transform:scale(1);
  box-shadow:0 0 0 3px rgba(47,224,200,.24);
}

.nav-cta{display:flex;align-items:center;gap:.45rem;flex:none}
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  flex:none;
  padding:.45rem .85rem;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  background:var(--cream);
  color:var(--night);
  font-size:.8125rem;
  font-weight:700;
  letter-spacing:.08em;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:1.05rem;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background-color .25s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s ease,top .25s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  padding-block:clamp(2.5rem,5.5vw,4.25rem) 1.75rem;
  background:var(--night);
  color:rgba(244,239,230,.86);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:4px;
  background:linear-gradient(90deg,var(--brand) 0 38%,var(--cyan) 38% 60%,var(--orange) 60% 78%,var(--red) 78% 100%);
}
.site-footer::after{
  content:"";
  position:absolute;
  right:-6rem;
  bottom:-8rem;
  width:22rem;
  height:22rem;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,200,.12),transparent 70%);
  pointer-events:none;
}
.footer__grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr));
  gap:clamp(1.5rem,3vw,3rem);
}
.footer__brandname{
  font-family:var(--font-display);
  font-size:clamp(1.5rem,3vw,2rem);
  font-weight:700;
  letter-spacing:.14em;
  color:var(--cream);
}
.footer__tagline{
  margin-top:.4rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer__summary{
  margin-top:1rem;
  max-width:32ch;
  font-size:.9375rem;
  line-height:1.7;
  color:rgba(244,239,230,.76);
}
.footer__mark{
  margin-top:1.25rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:rgba(244,239,230,.45);
}
.footer__coltitle{
  margin-bottom:.9rem;
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(244,239,230,.55);
}
.footer__list{display:grid;gap:.6rem}
.footer__link{
  display:inline-block;
  font-size:.9375rem;
  color:rgba(244,239,230,.86);
  text-decoration:none;
  border-bottom:1px solid rgba(244,239,230,.16);
  padding-bottom:1px;
  transition:color .2s ease,border-color .2s ease;
}
.footer__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer__base{
  position:relative;
  z-index:1;
  display:grid;
  gap:.5rem;
  margin-top:clamp(2rem,4vw,3rem);
  padding-top:1.5rem;
  border-top:1px solid rgba(244,239,230,.16);
}
.footer__contact{
  font-family:var(--font-mono);
  font-size:.875rem;
  letter-spacing:.02em;
  color:rgba(244,239,230,.92);
}
.footer__footnote{font-size:.8125rem;color:rgba(244,239,230,.58)}
.footer__legal{font-size:.8125rem;color:rgba(244,239,230,.58)}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.4rem;
  padding:.62rem 1.1rem;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--solid{background:var(--brand);color:var(--white)}
.btn--solid:hover{background:var(--night)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--night)}
.btn--ghost:hover{background:var(--ice);border-color:rgba(27,76,140,.4)}
.btn--warm{background:var(--orange);color:var(--white)}
.btn--warm:hover{background:var(--orange-ink)}
.btn--sm{padding:.45rem .9rem;font-size:.8125rem}

/* ---------- 7. 面包屑与坐标索引 ---------- */
.breadcrumb{font-size:.8125rem;color:var(--grey)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumb__link{color:var(--brand);text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb__link:hover{border-bottom-color:currentColor}
.breadcrumb__sep{color:var(--line-strong)}
.breadcrumb__current{color:var(--ink);font-weight:700}

.coordbar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem .9rem;
  padding-block:.6rem;
  border-block:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--grey);
}
.coordbar__key{color:var(--cyan-ink)}
.coordbar__sep{color:var(--line-strong)}

/* ---------- 8. 布局容器 ---------- */
.wrap{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--tight{padding-block:clamp(1.75rem,4vw,3rem)}
.stack{display:flex;flex-direction:column;gap:clamp(.75rem,1.6vw,1.5rem)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem}
.grid{display:grid;gap:clamp(1rem,2.4vw,2rem)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 9. 文本层级 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan-ink);
}
.eyebrow::before{
  content:"";
  width:1.5rem;
  height:2px;
  border-radius:2px;
  background:currentColor;
}
.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3.6vw,2.75rem);
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.08;
  color:var(--night);
}
.lede{
  max-width:64ch;
  font-size:clamp(1.0625rem,1.5vw,1.25rem);
  line-height:1.7;
  color:rgba(27,23,18,.78);
}
.prose{max-width:68ch;font-size:1.0625rem;line-height:1.8;color:rgba(27,23,18,.86)}
.prose p+p{margin-top:1em}
.prose h2,.prose h3{margin-top:1.6em;color:var(--night)}
.prose h2{font-size:1.5rem}
.prose h3{font-size:1.1875rem}
.prose ul{display:grid;gap:.4rem;margin-top:1em;padding-left:1.1rem;list-style:square}
.prose a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---------- 10. 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(1.25rem,2.6vw,2rem);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:var(--white);
}
.card--data{background:var(--ice);border-color:rgba(27,76,140,.18)}
.card--night{background:var(--night);border-color:rgba(47,224,200,.22);color:var(--cream)}
.card--flat{background:transparent;border-style:dashed;border-color:var(--line-strong)}
.card__head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:1rem;
  margin-bottom:.9rem;
}
.card__title{font-size:1.0625rem;font-weight:700;letter-spacing:.02em}
.card__meta{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--grey);
  white-space:nowrap;
}
.card--night .card__meta{color:rgba(244,239,230,.66)}
.card--night .card__title{color:var(--cream)}

/* ---------- 11. 数字 ---------- */
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.01em;
}
.num--hero{
  display:block;
  font-size:clamp(2.5rem,7vw,5rem);
  font-weight:700;
  line-height:.92;
  color:var(--night);
}
.num--lg{display:block;font-size:clamp(1.75rem,3.4vw,2.75rem);font-weight:700;line-height:1}
.num--cyan{color:var(--cyan-ink)}
.num--orange{color:var(--orange-ink)}
.card--night .num--hero,.card--night .num--lg{color:var(--cyan)}

/* ---------- 12. 色签与图例 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.22rem .6rem;
  border:1px solid rgba(27,76,140,.16);
  border-radius:var(--radius-pill);
  background:var(--ice);
  color:var(--night);
  font-size:.75rem;
  font-weight:700;
  letter-spacing:.05em;
  white-space:nowrap;
}
.tag::before{content:"";width:.4rem;height:.4rem;flex:none;border-radius:50%;background:currentColor}
.tag--league{background:rgba(194,64,42,.1);border-color:rgba(194,64,42,.22);color:var(--red-ink)}
.tag--alert{background:rgba(232,114,44,.14);border-color:rgba(232,114,44,.32);color:var(--orange-ink)}
.tag--data{background:rgba(47,224,200,.18);border-color:rgba(47,224,200,.42);color:var(--cyan-ink)}

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1.25rem;
  font-size:.8125rem;
  color:rgba(27,23,18,.75);
}
.legend__item{display:inline-flex;align-items:center;gap:.45rem}
.legend__swatch{
  width:.75rem;
  height:.75rem;
  flex:none;
  border:1px solid var(--line-strong);
  border-radius:4px;
  background:var(--ice);
}
.legend__swatch--brand{background:var(--brand);border-color:var(--brand)}
.legend__swatch--cyan{background:var(--cyan);border-color:var(--cyan)}
.legend__swatch--orange{background:var(--orange);border-color:var(--orange)}
.legend--night{color:rgba(244,239,230,.78)}
.legend--night .legend__swatch{border-color:rgba(244,239,230,.4)}

/* ---------- 13. 公告短行卡 ---------- */
.notice{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:1rem;
  padding:.9rem 1.1rem;
  border:1px solid var(--line);
  border-left:6px solid var(--orange);
  border-radius:var(--radius-md);
  background:var(--white);
}
.notice__rail{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--orange-ink);
}
.notice__body{font-size:.9375rem;line-height:1.6}
.notice__time{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--grey);
  white-space:nowrap;
}

/* ---------- 14. 数据表 ---------- */
.table-scroll{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--white);
}
.data-table{width:100%;min-width:640px;font-size:.9375rem}
.data-table th,.data-table td{
  padding:.7rem .9rem;
  text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:middle;
}
.data-table thead th{
  background:var(--night);
  color:var(--cream);
  font-size:.6875rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  white-space:nowrap;
}
.data-table tbody tr:nth-child(even){background:rgba(220,231,242,.42)}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table td.num{color:var(--cyan-ink);font-weight:700}

/* ---------- 15. 时间轴 ---------- */
.rail{
  position:relative;
  padding-left:1.5rem;
  border-left:2px solid rgba(27,76,140,.24);
}
.rail__item{position:relative;padding-bottom:1.25rem}
.rail__item:last-child{padding-bottom:0}
.rail__item::before{
  content:"";
  position:absolute;
  top:.55rem;
  left:calc(-1.5rem - 1px);
  width:.6rem;
  height:.6rem;
  border:2px solid var(--grey);
  border-radius:50%;
  background:var(--cream);
  transform:translateX(-50%);
}
.rail__item[data-state="current"]::before{
  border-color:var(--cyan);
  background:var(--cyan);
  box-shadow:0 0 0 4px rgba(47,224,200,.22);
}
.rail__label{
  display:block;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--grey);
}

/* ---------- 16. 筛选 ---------- */
.chipbar{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.4rem .85rem;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  background:var(--white);
  color:var(--night);
  font-size:.8125rem;
  font-weight:700;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{background:var(--ice)}
.chip[aria-pressed="true"]{background:var(--brand);border-color:var(--brand);color:var(--white)}

/* ---------- 17. 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(140deg,var(--ice) 0%,rgba(27,76,140,.35) 55%,var(--night) 100%);
  aspect-ratio:16/9;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--night{background:linear-gradient(140deg,var(--night) 0%,rgba(27,76,140,.85) 100%)}
.media img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__caption{
  position:absolute;
  inset:auto 0 0 0;
  padding:.75rem 1rem;
  background:linear-gradient(180deg,transparent,rgba(14,42,71,.85));
  color:var(--cream);
  font-size:.75rem;
  letter-spacing:.06em;
  line-height:1.5;
}

/* ---------- 18. 显现动效 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s ease,transform .55s ease;
}
.js-reveal [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 19. 响应式 ---------- */
@media (max-width:1180px){
  .nav-cta .btn--ghost{display:none}
}

@media (max-width:1080px){
  .span-3,.span-4,.span-5{grid-column:span 6}
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:1 / -1}
}

@media (max-width:1000px){
  .nav-pod{
    flex-wrap:wrap;
    border-radius:26px;
    padding:.55rem .65rem;
    gap:.5rem;
  }
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav,.nav-cta{display:none;width:100%;margin:0}
  .nav{order:5;margin-top:.4rem;padding-top:.7rem;border-top:1px dashed var(--line-strong)}
  .nav-cta{order:6}
  .nav-pod[data-open] .nav{display:block}
  .nav-pod[data-open] .nav-cta{display:flex;flex-direction:column;align-items:stretch;margin-top:.8rem;gap:.5rem}
  .nav__list{flex-direction:column;align-items:stretch;gap:.15rem}
  .nav__link{
    width:100%;
    padding:.7rem .8rem;
    border-radius:var(--radius-sm);
    font-size:1rem;
    background:var(--cream);
  }
  .nav__link[aria-current="page"]{background:var(--ice)}
  .brand__line{display:none}
}

@media (max-width:760px){
  body{font-size:16px}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .announce__text{font-size:.75rem}
  .nav-shell{padding-bottom:.6rem}
  .notice{grid-template-columns:1fr;gap:.35rem}
  .footer__grid{grid-template-columns:1fr}
  .footer__base{padding-top:1.25rem}
}

@media (max-width:480px){
  .announce__tag{display:none}
  .btn{width:100%}
  .nav-toggle{width:auto}
}

/* ---------- 20. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}