/* ============================================================
   星空体育站 · 共享样式 /assets/site.css
   深空底色 + 脉搏轨迹 + 切角面板 + 非对称网格
   ============================================================ */

:root{
  --ink:#050914;
  --ink-2:#0B1226;
  --panel:#131C36;
  --line:#24304F;
  --cyan:#2BE3D0;
  --violet:#7C5CFF;
  --orange:#FF7A2E;
  --white:#F1F5FF;
  --gray:#97A2C0;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Courier New",monospace;
  --shell:1200px;
  --read:680px;
  --gap:24px;
  --cut:16px;
  --cut-shape:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{
  margin:0;
  background-color:var(--ink);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    radial-gradient(circle at 12% 22%,rgba(43,227,208,.22) 0 1.5px,transparent 2.5px),
    radial-gradient(circle at 74% 12%,rgba(241,245,255,.32) 0 1px,transparent 2px),
    radial-gradient(circle at 42% 68%,rgba(124,92,255,.28) 0 1.5px,transparent 2.5px),
    radial-gradient(circle at 88% 76%,rgba(43,227,208,.18) 0 1px,transparent 2px),
    radial-gradient(circle at 24% 88%,rgba(255,122,46,.20) 0 1.2px,transparent 2.4px);
  background-size:420px 420px,560px 560px,640px 640px,380px 380px,520px 520px;
  background-repeat:repeat;
}
img,svg,video{display:block;max-width:100%}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:900;line-height:1.15;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
table{border-collapse:collapse}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--white)}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
::selection{background:var(--cyan);color:var(--ink)}
.site-header,.site-footer,main{position:relative;z-index:1}

/* ---------- 通用容器与排印 ---------- */
.container{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px}
.container--narrow{max-width:calc(var(--read) + 48px)}
.display{font-size:clamp(3.2rem,9vw,7.5rem);font-weight:900;line-height:.95;letter-spacing:-.02em;margin:0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.rule{height:1px;border:0;background-color:var(--line);margin:48px 0}
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:140;
  padding:10px 18px;background-color:var(--cyan);color:var(--ink);
  font-size:13px;letter-spacing:.16em;transition:top .2s ease;
}
.skip-link:focus{top:12px;color:var(--ink)}
.section-index{
  display:block;font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px;
}
.section-index--violet{color:var(--violet)}
.section-index--orange{color:var(--orange)}
.note{
  border-left:2px solid var(--cyan);
  padding:2px 0 2px 14px;
  margin:24px 0;
  font-size:14px;line-height:1.6;color:var(--gray);
}
.note--orange{border-left-color:var(--orange)}
.prose{max-width:var(--read);color:var(--gray);font-size:17px;line-height:1.75}
.prose p{margin-bottom:1.4em}
.prose h2,.prose h3{color:var(--white);margin:1.8em 0 .6em}
.prose h2{font-size:1.5rem}
.prose h3{font-size:1.2rem}
.prose strong{color:var(--white)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(43,227,208,.45)}

/* ---------- 章节与网格 ---------- */
.section{position:relative;padding:72px 0}
.section--tight{padding:44px 0}
.section--alt{background-color:var(--ink-2)}
.section--edge{overflow:hidden}
.section--slice::before{
  content:"";position:absolute;inset:-12% -20%;pointer-events:none;
  background-image:linear-gradient(115deg,rgba(124,92,255,.16),transparent 55%);
  transform:skewY(-6deg);
}
.section__head{position:relative;max-width:var(--read);margin-bottom:36px}
.section__title{font-size:clamp(1.8rem,4.4vw,3rem);font-weight:900;margin-bottom:14px}
.section__lede{color:var(--gray);max-width:var(--read)}
.section__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--gray);margin-top:14px}
.grid-12{display:grid;grid-template-columns:1fr;gap:var(--gap)}
.col--main,.col--aside,.col--half,.col--wide{min-width:0}
@media (min-width:881px){
  .grid-12{grid-template-columns:repeat(12,1fr)}
  .col--main{grid-column:1 / span 7}
  .col--aside{grid-column:9 / span 4}
  .col--half{grid-column:span 6}
  .col--wide{grid-column:1 / span 12}
}

/* ---------- 刊头 / 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background-color:rgba(5,9,20,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:background-color .3s ease,border-color .3s ease;
}
.site-header[data-scrolled]{background-color:rgba(5,9,20,.98);border-bottom-color:rgba(43,227,208,.35)}
.masthead{
  position:relative;width:100%;max-width:var(--shell);margin:0 auto;
  padding:20px 24px 16px;display:flex;flex-direction:column;align-items:center;
  transition:padding .3s ease,gap .3s ease;
}
.masthead__top{position:relative;width:100%;display:flex;flex-direction:column;align-items:center;gap:6px}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--white);text-decoration:none}
.brand:hover{color:var(--white)}
.brand__mark{
  width:13px;height:13px;flex:0 0 auto;
  background-image:linear-gradient(135deg,var(--cyan),var(--violet));
  clip-path:polygon(0 0,100% 0,100% 55%,55% 100%,0 100%);
  box-shadow:0 0 14px rgba(43,227,208,.55);
  transition:width .3s ease,height .3s ease;
}
.brand__name{
  display:inline-block;text-indent:.24em;
  font-size:clamp(1.5rem,5vw,2.15rem);font-weight:900;letter-spacing:.24em;line-height:1.1;
  transition:font-size .3s ease,letter-spacing .3s ease;
}
.brand__line{margin:0;font-size:11px;letter-spacing:.34em;text-indent:.34em;color:var(--gray);text-align:center}
.nav-toggle{
  position:absolute;right:0;top:0;
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 12px;background-color:transparent;border:1px solid var(--line);
  color:var(--white);font-size:12px;letter-spacing:.2em;cursor:pointer;
  clip-path:var(--cut-shape);
  transition:color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{color:var(--cyan);border-color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background-color:var(--cyan);transition:background-color .2s ease}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background-color:var(--cyan);
  transition:transform .25s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.site-header[data-open] .nav-toggle__bars{background-color:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}
.site-nav{display:none;width:100%}
.site-nav[data-open]{display:block}
.site-nav__list{display:flex;flex-direction:column;width:100%}
.site-nav__item{border-bottom:1px solid var(--line)}
.site-nav__link{
  display:block;padding:14px 2px 14px 12px;
  color:var(--gray);font-size:15px;letter-spacing:.1em;
  border-left:2px solid transparent;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.site-nav__link:hover{color:var(--white);background-color:rgba(43,227,208,.06)}
.site-nav__link[aria-current="page"]{color:var(--cyan);border-left-color:var(--orange);background-color:rgba(43,227,208,.06)}
.site-nav__utility{display:flex;flex-wrap:wrap;gap:10px;padding:16px 2px 4px}
.utility-link{
  font-size:12px;letter-spacing:.16em;color:var(--gray);
  border:1px solid var(--line);padding:7px 12px;
  clip-path:var(--cut-shape);
  transition:color .2s ease,border-color .2s ease;
}
.utility-link:hover{color:var(--cyan);border-color:var(--cyan)}
.pulse-track{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;z-index:2;
  background-color:var(--line);overflow:hidden;pointer-events:none;
}
.pulse-track__fill{
  display:block;height:100%;width:0;
  background-image:linear-gradient(90deg,var(--violet),var(--cyan) 70%,var(--orange));
  box-shadow:0 0 14px rgba(43,227,208,.7);
  transition:width .12s linear;
}
@media (prefers-reduced-motion:no-preference){
  .pulse-track__fill{animation:pulseGlow 6s ease-in-out infinite}
}
@keyframes pulseGlow{0%,100%{filter:brightness(1)}50%{filter:brightness(1.55)}}

@media (min-width:881px){
  .nav-toggle{display:none}
  .site-nav{display:flex;justify-content:center;width:100%;margin-top:18px}
  .site-nav__list{flex-direction:row;justify-content:center;gap:2px;width:auto}
  .site-nav__item{border-bottom:0}
  .site-nav__link{position:relative;padding:10px 18px;border-left:0;font-size:14px;letter-spacing:.16em}
  .site-nav__link::after{
    content:"";position:absolute;left:18px;right:18px;bottom:2px;height:2px;
    background-color:var(--cyan);transform:scaleX(0);transform-origin:left center;
    transition:transform .25s ease;
  }
  .site-nav__link:hover{background-color:transparent}
  .site-nav__link:hover::after{transform:scaleX(1)}
  .site-nav__link[aria-current="page"]{background-color:transparent}
  .site-nav__link[aria-current="page"]::after{transform:scaleX(1);background-color:var(--orange)}
  .site-nav__utility{position:absolute;right:24px;top:20px;padding:0;flex-wrap:nowrap}

  .site-header[data-scrolled] .masthead{
    flex-direction:row;align-items:center;justify-content:center;gap:28px;
    min-height:52px;padding:6px 24px;
  }
  .site-header[data-scrolled] .masthead__top{width:auto;flex-direction:row;align-items:center;gap:0}
  .site-header[data-scrolled] .brand__line{display:none}
  .site-header[data-scrolled] .brand__name{font-size:1.05rem;letter-spacing:.16em;text-indent:.16em}
  .site-header[data-scrolled] .brand__mark{width:10px;height:10px}
  .site-header[data-scrolled] .site-nav{margin-top:0;width:auto}
  .site-header[data-scrolled] .site-nav__link{padding:6px 12px;font-size:13px;letter-spacing:.12em}
  .site-header[data-scrolled] .site-nav__link::after{left:12px;right:12px;bottom:0}
  .site-header[data-scrolled] .site-nav__utility{display:none}
}
@media (max-width:880px){
  .site-header[data-scrolled] .masthead{padding-top:10px;padding-bottom:10px}
  .site-header[data-scrolled] .brand__line{display:none}
  .site-header[data-scrolled] .brand__name{font-size:1.2rem}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;margin-top:96px;overflow:hidden;
  background-color:var(--ink-2);border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(118deg,rgba(43,227,208,.10),transparent 45%),
                   linear-gradient(300deg,rgba(124,92,255,.14),transparent 52%);
}
.site-footer > .container{position:relative;z-index:1}
.footer__grid{display:grid;grid-template-columns:1fr;gap:36px;padding:64px 0 40px}
.footer__col{min-width:0}
.footer__wordmark{font-size:clamp(1.5rem,4vw,2rem);font-weight:900;letter-spacing:.24em;text-indent:.24em;color:var(--white)}
.footer__slogan{margin-top:12px;font-size:13px;letter-spacing:.2em;color:var(--gray)}
.footer__tagline{margin-top:18px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--gray)}
.footer__title{
  margin-bottom:16px;font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);
}
.footer__list{display:grid;gap:11px}
.footer__list--contact{gap:14px}
.footer__list a{color:var(--gray);font-size:14px;letter-spacing:.04em}
.footer__list a::before{content:"—";color:var(--line);margin-right:8px}
.footer__list a:hover{color:var(--white)}
.footer__contact-item{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--gray);word-break:break-all}
.footer__contact-item--plain{word-break:normal;line-height:1.7}
.footer__contact-text{font-family:var(--font-mono);font-size:13px;color:var(--white)}
.copy-btn{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  padding:4px 8px;background-color:transparent;border:1px solid var(--line);
  color:var(--gray);cursor:pointer;clip-path:var(--cut-shape);
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.copy-btn:hover{color:var(--cyan);border-color:var(--cyan)}
.copy-btn[data-copied="ok"]{background-color:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.copy-btn[data-copied="fail"]{border-color:var(--orange);color:var(--orange)}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 28px;
  padding:22px 0 34px;border-top:1px solid var(--line);
  font-size:12px;letter-spacing:.06em;color:var(--gray);
}
.footer__legal-list{display:flex;flex-wrap:wrap;gap:20px}
.footer__legal-list a{color:var(--gray);font-size:12px;letter-spacing:.1em}
.footer__legal-list a:hover{color:var(--cyan)}
.footer__note{flex:1 1 320px;min-width:220px}
.footer__icp,.footer__copy{font-family:var(--font-mono);letter-spacing:.1em}
@media (min-width:881px){
  .footer__grid{grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:32px}
}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 24px;background-color:var(--cyan);border:1px solid var(--cyan);
  color:var(--ink);font-size:14px;font-weight:700;letter-spacing:.14em;
  clip-path:var(--cut-shape);cursor:pointer;
  transition:background-color .2s ease,color .2s ease,transform .2s ease;
}
.btn:hover{background-color:var(--white);border-color:var(--white);color:var(--ink);transform:translateX(4px)}
.btn--ghost{background-color:transparent;color:var(--cyan);border-color:var(--cyan)}
.btn--ghost:hover{background-color:rgba(43,227,208,.12);color:var(--white)}
.btn--signal{background-color:var(--orange);border-color:var(--orange);color:var(--ink)}
.btn--signal:hover{background-color:var(--white);border-color:var(--white)}
.btn--sm{padding:9px 16px;font-size:12px;letter-spacing:.12em}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

.tag{
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
  padding:4px 10px;border:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--gray);
}
.tag--cyan{color:var(--cyan);border-color:rgba(43,227,208,.45)}
.tag--violet{color:var(--violet);border-color:rgba(124,92,255,.5)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,46,.5);background-color:rgba(255,122,46,.08)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

.panel{
  position:relative;padding:26px;background-color:var(--panel);
  border:1px solid var(--line);clip-path:var(--cut-shape);
  transition:border-color .25s ease,transform .25s ease;
}
.panel--plain{clip-path:none}
.panel--tint{background-image:linear-gradient(140deg,rgba(43,227,208,.10),transparent 62%)}
.panel__index{display:block;margin-bottom:12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--violet)}
.panel__title{font-size:1.1rem;font-weight:700;margin-bottom:10px}
.panel__body{font-size:15px;color:var(--gray)}

.score{
  display:flex;align-items:baseline;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;
  font-size:clamp(2.4rem,7vw,4.6rem);line-height:1;letter-spacing:-.02em;color:var(--cyan);
}
.score--orange{color:var(--orange)}
.score__sep{font-size:.42em;color:var(--gray);padding:0 12px;letter-spacing:.1em}
.score__meta{display:block;margin-top:10px;font-size:12px;letter-spacing:.2em;color:var(--gray)}

.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:24px}
.stat{display:grid;gap:6px;min-width:0}
.stat__value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(1.5rem,4vw,2.2rem);font-weight:700;line-height:1.1;color:var(--white)}
.stat--cyan .stat__value{color:var(--cyan)}
.stat--orange .stat__value{color:var(--orange)}
.stat__label{font-size:12px;letter-spacing:.18em;color:var(--gray)}

.path-rail{display:grid;border-top:1px solid var(--line)}
.path-rail__item{
  display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;
  padding:20px 0;border-bottom:1px solid var(--line);color:var(--white);
  transition:background-color .22s ease,padding-left .22s ease;
}
.path-rail__item:hover{color:var(--white);background-color:rgba(43,227,208,.06);padding-left:10px}
.path-rail__index{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--cyan);padding-top:6px}
.path-rail__title{font-size:1.05rem;font-weight:700;margin-bottom:6px}
.path-rail__desc{font-size:14px;line-height:1.65;color:var(--gray)}

.media{
  position:relative;overflow:hidden;
  background-color:var(--ink-2);border:1px solid var(--line);clip-path:var(--cut-shape);
}
.media__img{
  display:block;width:100%;height:100%;aspect-ratio:16 / 9;object-fit:cover;
  background-image:
    linear-gradient(135deg,rgba(43,227,208,.18),rgba(124,92,255,.16)),
    radial-gradient(circle at 28% 34%,rgba(255,122,46,.14),transparent 62%);
}
.media--wide .media__img{aspect-ratio:21 / 9}
.media--tall .media__img{aspect-ratio:4 / 5}
.media--square .media__img{aspect-ratio:1 / 1}
.media__body{
  position:absolute;left:0;right:0;bottom:0;padding:22px;
  background-image:linear-gradient(0deg,rgba(5,9,20,.94),transparent);
}
.media__badge{position:absolute;top:14px;left:14px}
.media__caption{padding-top:10px;font-size:12px;letter-spacing:.08em;color:var(--gray)}

.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table caption{padding-bottom:12px;text-align:left;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--gray)}
.data-table th{
  padding:10px 12px;text-align:left;white-space:nowrap;
  font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.18em;
  text-transform:uppercase;color:var(--gray);
  background-color:rgba(36,48,79,.45);border-bottom:1px solid var(--line);
}
.data-table td{padding:12px;color:var(--gray);border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
.data-table td .num,.data-table td strong{font-family:var(--font-mono);color:var(--white)}
.data-table tbody tr:hover{background-color:rgba(43,227,208,.06)}
.data-table tr.is-lead td{color:var(--white)}

.breadcrumb{margin:28px 0}
.breadcrumb__list{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--gray)}
.breadcrumb__list li+li::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumb__list a{color:var(--gray)}
.breadcrumb__list a:hover{color:var(--cyan)}
.breadcrumb__list [aria-current="page"]{color:var(--white)}

.accordion{border-top:1px solid var(--line)}
.accordion__item{border-bottom:1px solid var(--line)}
.accordion__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  padding:18px 0;background:none;border:0;cursor:pointer;
  color:var(--white);font-size:16px;font-weight:600;text-align:left;letter-spacing:.02em;
}
.accordion__trigger::after{content:"+";font-family:var(--font-mono);font-size:18px;color:var(--cyan);line-height:1}
.accordion__item[data-open] .accordion__trigger::after{content:"–";color:var(--orange)}
.accordion__panel{display:none;padding:0 0 20px;font-size:15px;line-height:1.75;color:var(--gray)}
.accordion__item[data-open] .accordion__panel{display:block;margin-left:2px;padding-left:16px;border-left:2px solid var(--cyan)}

.tabs__list{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;border-bottom:1px solid var(--line)}
.tabs__btn{
  flex:0 0 auto;padding:9px 16px;background-color:transparent;border:1px solid var(--line);
  color:var(--gray);font-size:13px;letter-spacing:.14em;cursor:pointer;
  clip-path:var(--cut-shape);transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.tabs__btn:hover{color:var(--cyan);border-color:var(--cyan)}
.tabs__btn[aria-selected="true"]{background-color:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.tabs__panel{display:none;padding-top:26px}
.tabs__panel[data-open]{display:block}

.scroll-x{
  display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 24px 20px;scrollbar-color:var(--cyan) var(--line);
}
.scroll-x > *{flex:0 0 clamp(240px,72vw,320px);scroll-snap-align:start}
.scroll-x::-webkit-scrollbar{height:4px}
.scroll-x::-webkit-scrollbar-track{background-color:var(--line)}
.scroll-x::-webkit-scrollbar-thumb{background-image:linear-gradient(90deg,var(--cyan),var(--violet))}

.to-top{
  position:fixed;right:20px;bottom:22px;z-index:90;
  width:46px;height:46px;display:grid;place-items:center;
  background-color:rgba(19,28,54,.94);border:1px solid var(--line);color:var(--cyan);
  cursor:pointer;clip-path:var(--cut-shape);
  opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .2s ease,transform .2s ease,border-color .2s ease;
}
.to-top::before{content:"↑";font-family:var(--font-mono);font-size:16px;line-height:1}
.to-top[data-visible]{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--cyan)}

[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .32s ease,transform .32s ease;
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.2s !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .pulse-track__fill{animation:none}
  .btn:hover{transform:none}
  .path-rail__item:hover{padding-left:0}
}