:root{
  --ink-900:#0A1626;
  --ink-800:#122136;
  --ink-700:#1B2A47;
  --field:#0C1B2E;
  --grass:#1C6B4A;
  --accent:#39FF9E;
  --accent-2:#FF8A3D;
  --teal:#2FA9C9;
  --warn:#FFD166;
  --text:#EDF2F7;
  --muted:#8A97A8;
  --line:rgba(237,242,247,.09);
  --line-strong:rgba(237,242,247,.18);
  --rail-w:264px;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-sm:12px;
  --font-head:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --shadow-panel:0 24px 60px rgba(4,10,20,.55);
  --ease:cubic-bezier(.22,.68,0,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:0}
::selection{background:var(--accent);color:#04140C}

body{
  min-height:100vh;
  background-color:var(--ink-900);
  color:var(--text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    radial-gradient(1200px 560px at 8% -6%,rgba(28,107,74,.44),transparent 62%),
    radial-gradient(920px 480px at 92% 2%,rgba(47,169,201,.16),transparent 60%),
    linear-gradient(180deg,#0A1626 0%,#0A1626 54%,#08131F 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:.55;
  background-image:repeating-linear-gradient(0deg,rgba(237,242,247,.022) 0 1px,transparent 1px 4px);
}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;letter-spacing:-.02em;line-height:1.16;text-wrap:balance}
h1{font-size:clamp(34px,5.2vw,56px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(21px,2.4vw,28px)}
h4{font-size:22px;line-height:1.3}
p,li{text-wrap:pretty}
p{max-width:74ch}
strong{font-weight:700;color:#fff}
small{font-size:13px;color:var(--muted)}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.u-mono{font-family:var(--font-num);letter-spacing:.02em}
.u-muted{color:var(--muted)}
.u-accent{color:var(--accent)}
.u-center{text-align:center}

#main-content{display:block;scroll-margin-top:96px}

.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:200;
  transform:translateY(-180%);
  padding:12px 20px;
  border-radius:999px;
  background:var(--accent);
  color:#04140C;
  font-weight:700;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ============ HEADER / SIDE RAIL ============ */
.site-header{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail-w);
  z-index:90;
}
.rail{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:26px;
  height:100%;
  padding:26px 20px 24px;
  background-color:var(--ink-800);
  background-image:
    linear-gradient(180deg,rgba(18,33,54,.98),rgba(10,22,38,.96)),
    repeating-linear-gradient(115deg,rgba(237,242,247,.028) 0 1px,transparent 1px 12px);
  border-right:1px solid var(--line);
}
.rail::before{
  content:"";
  position:absolute;
  top:0;
  right:-1px;
  width:1px;
  height:100%;
  background:linear-gradient(180deg,transparent,rgba(57,255,158,.5) 22%,rgba(47,169,201,.4) 62%,transparent);
  pointer-events:none;
}
.rail__top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex:none;
}
.rail__actions{display:flex;align-items:center;gap:8px}
.rail__quick{display:none}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  flex:none;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:14px;
  border:1px solid rgba(57,255,158,.38);
  background:linear-gradient(140deg,rgba(28,107,74,.9),rgba(18,33,54,.95) 72%);
  color:var(--accent);
  font-family:var(--font-head);
  font-weight:800;
  font-size:18px;
  line-height:1;
  box-shadow:inset 0 0 22px rgba(57,255,158,.14);
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-family:var(--font-head);font-weight:800;font-size:19px;letter-spacing:.05em;line-height:1.25;color:var(--text)}
.brand__tag{font-family:var(--font-num);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);line-height:1.6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand--footer .brand__tag{letter-spacing:.12em;text-transform:none}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 15px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  background:rgba(27,42,71,.7);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--text);
}
.nav-toggle__bars{position:relative;width:18px;height:12px;flex:none}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

.rail__nav{
  display:flex;
  flex-direction:column;
  gap:22px;
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  padding-right:4px;
}
.rail__nav::-webkit-scrollbar{width:6px}
.rail__nav::-webkit-scrollbar-thumb{background:rgba(237,242,247,.16);border-radius:99px}

.rail__list{display:flex;flex-direction:column;gap:4px}
.rail__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:12px 14px;
  border-radius:14px;
  color:var(--muted);
  font-weight:600;
  letter-spacing:.02em;
  transition:color .2s ease,background .2s ease,transform .26s var(--ease);
}
.rail__link:hover{color:var(--text);background:rgba(57,255,158,.07);transform:translateX(4px)}
.rail__link[aria-current="page"]{
  color:var(--text);
  background:linear-gradient(90deg,rgba(57,255,158,.16),rgba(57,255,158,0));
}
.rail__link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:0;
  top:10px;
  bottom:10px;
  width:3px;
  border-radius:3px;
  background:var(--accent);
  box-shadow:0 0 14px rgba(57,255,158,.75);
}
.rail__idx{font-family:var(--font-num);font-size:12px;font-weight:600;color:var(--muted);opacity:.85;letter-spacing:.06em}
.rail__link[aria-current="page"] .rail__idx{color:var(--accent);opacity:1}
.rail__label{font-size:16px}

.rail__meta{margin-top:auto;display:flex;flex-direction:column;gap:10px;flex:none}
.rail__cta{margin-top:2px}
.status{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 13px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(27,42,71,.62);
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.5;
}
.status__dot{
  flex:none;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--accent);
  animation:dotPulse 2.6s infinite;
}
.status--line .status__dot{background:var(--teal);animation-name:dotPulseLine}
.status__key{color:var(--muted)}
.status__val{margin-left:auto;color:var(--text);font-weight:600}
.rail__scrim{display:none}

@keyframes dotPulse{
  0%{box-shadow:0 0 0 0 rgba(57,255,158,.5)}
  70%{box-shadow:0 0 0 8px rgba(57,255,158,0)}
  100%{box-shadow:0 0 0 0 rgba(57,255,158,0)}
}
@keyframes dotPulseLine{
  0%{box-shadow:0 0 0 0 rgba(47,169,201,.5)}
  70%{box-shadow:0 0 0 8px rgba(47,169,201,0)}
  100%{box-shadow:0 0 0 0 rgba(47,169,201,0)}
}

/* ============ FOOTER ============ */
.site-footer{
  position:relative;
  margin-top:clamp(72px,9vw,140px);
  padding:clamp(42px,5vw,72px) 0 26px;
  background-image:linear-gradient(180deg,rgba(18,33,54,.62),rgba(8,19,32,.96));
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(420px,42vw);
  height:1px;
  background:linear-gradient(90deg,var(--accent),rgba(57,255,158,0));
}
.footer__grid{display:grid;gap:clamp(30px,4vw,56px);grid-template-columns:1fr}
.footer__col{display:flex;flex-direction:column;gap:14px;min-width:0}
.footer__col--brand{gap:18px}
.footer__lead{font-size:15px;color:var(--muted);max-width:42ch;margin:0}
.footer__lead + .btn{align-self:flex-start}
.footer__title{
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:10px;
}
.footer__title::after{content:"";flex:1 1 auto;height:1px;background:var(--line)}
.footer__links{display:flex;flex-direction:column;gap:9px;font-size:15px}
.footer__links a{color:var(--muted);transition:color .2s ease}
.footer__links a:hover,
.footer__links a:focus-visible{color:var(--text);text-decoration:underline;text-decoration-color:rgba(57,255,158,.6);text-underline-offset:4px}
.contact-list{display:flex;flex-direction:column;gap:14px;font-size:15px}
.contact-item{display:flex;flex-direction:column;gap:2px}
.contact-item__key{font-family:var(--font-num);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.contact-item__val{color:var(--text);word-break:break-word}
.footer__note{font-size:13px;color:var(--muted);max-width:40ch}
.footer__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  margin-top:clamp(32px,4vw,52px);
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.footer__copy{font-family:var(--font-num);letter-spacing:.04em;margin:0;max-width:none}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer__legal a{color:var(--muted)}
.footer__legal a:hover,.footer__legal a:focus-visible{color:var(--accent)}
.to-top{flex:none}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-head);
  font-size:16px;
  font-weight:700;
  letter-spacing:.03em;
  text-align:center;
  transition:transform .24s var(--ease),background .24s ease,border-color .24s ease,color .24s ease,box-shadow .24s ease;
}
.btn--accent{background:linear-gradient(135deg,#39FF9E,#25D986);color:#04140C;box-shadow:0 12px 32px rgba(57,255,158,.2)}
.btn--accent:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(57,255,158,.28)}
.btn--ghost{border-color:var(--line-strong);background:rgba(18,33,54,.6);color:var(--text)}
.btn--ghost:hover{border-color:rgba(57,255,158,.5);color:var(--accent);transform:translateY(-2px)}
.btn--sm{min-height:40px;padding:0 16px;font-size:14px}
.btn--wide{width:100%}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  color:var(--accent);
  font-size:16px;
}
.link-arrow::after{content:"→";font-family:var(--font-num);transition:transform .24s var(--ease)}
.link-arrow:hover::after{transform:translateX(5px)}

/* ============ LAYOUT ============ */
.shell{width:100%;max-width:1200px;margin-inline:auto;padding-inline:clamp(18px,4vw,48px)}
.section{padding-block:clamp(48px,6vw,96px)}
.stack{display:flex;flex-direction:column;gap:clamp(24px,3.4vw,52px)}
.grid{display:grid;gap:clamp(16px,2.4vw,30px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(224px,1fr))}
.split{display:grid;gap:clamp(20px,3vw,40px)}
.split__aside{min-width:0}
.split__main{min-width:0}

/* ============ PANELS ============ */
.panel{
  position:relative;
  padding:clamp(22px,3vw,38px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background-image:linear-gradient(165deg,rgba(18,33,54,.97),rgba(13,26,44,.92));
  box-shadow:var(--shadow-panel);
}
.panel--flat{background-image:none;background-color:rgba(18,33,54,.55);box-shadow:none}
.panel--data{
  background-color:var(--field);
  background-image:
    repeating-linear-gradient(115deg,rgba(237,242,247,.035) 0 1px,transparent 1px 10px),
    linear-gradient(160deg,rgba(12,27,46,.98),rgba(10,22,38,.94));
}
.panel--offset{margin-inline-start:clamp(0px,3vw,44px)}

.section-head{display:flex;flex-direction:column;gap:10px;margin-bottom:clamp(20px,3vw,36px)}
.section-head__num{font-family:var(--font-num);font-size:12px;letter-spacing:.24em;color:var(--accent-2);text-transform:uppercase}
.section-head__title{margin:0}
.section-head__note{font-size:15.5px;color:var(--muted);max-width:60ch}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--accent);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.7}

.prose{max-width:70ch}
.prose p{margin-bottom:1.2em}
.prose h2,.prose h3{margin:1.6em 0 .6em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.2em;list-style:disc}
.prose li{margin-bottom:.5em}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:4px;text-decoration-color:rgba(57,255,158,.45)}

/* ============ BREADCRUMBS ============ */
.crumbs{padding-block:clamp(20px,3vw,34px) 0}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;font-family:var(--font-num);font-size:12.5px;letter-spacing:.06em;color:var(--muted)}
.crumbs__list li{display:flex;align-items:center;gap:10px}
.crumbs__list li + li::before{content:"/";color:rgba(237,242,247,.28)}
.crumbs__list a{color:var(--muted)}
.crumbs__list a:hover,.crumbs__list a:focus-visible{color:var(--accent)}
.crumbs__list [aria-current="page"]{color:var(--text)}

/* ============ BADGES / STATS ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line-strong);
  background:rgba(10,22,38,.62);
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
}
.badge--live{color:var(--accent);border-color:rgba(57,255,158,.42);background:rgba(57,255,158,.1)}
.badge--time{color:var(--accent-2);border-color:rgba(255,138,61,.36);background:rgba(255,138,61,.09)}
.badge--warn{color:var(--warn);border-color:rgba(255,209,102,.38);background:rgba(255,209,102,.09)}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 20px;
  border-radius:var(--radius-md);
  border:1px solid rgba(47,169,201,.24);
  background:linear-gradient(160deg,rgba(12,27,46,.9),rgba(18,33,54,.72));
}
.stat__label{font-family:var(--font-num);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.stat__value{font-family:var(--font-num);font-weight:600;font-size:clamp(26px,3.2vw,36px);line-height:1.1;color:var(--text);letter-spacing:0}
.stat__value--accent{color:var(--accent)}

/* ============ TRACK (赛程跑道) ============ */
.track{
  display:flex;
  gap:12px;
  overflow-x:auto;
  padding:6px 4px 14px;
  scroll-snap-type:x proximity;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.track::-webkit-scrollbar{height:6px}
.track::-webkit-scrollbar-thumb{background:rgba(237,242,247,.18);border-radius:99px}
.track__item{
  flex:0 0 auto;
  scroll-snap-align:start;
  min-width:178px;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:15px 17px;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(18,33,54,.96),rgba(10,22,38,.9));
  transition:transform .26s var(--ease),border-color .26s ease,box-shadow .26s ease;
}
.track__item:hover,.track__item:focus-visible{transform:translateX(6px);border-color:rgba(57,255,158,.48);box-shadow:0 16px 36px rgba(5,13,24,.62)}

/* ============ TABS ============ */
.tabs{
  display:flex;
  gap:6px;
  overflow-x:auto;
  padding:6px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(10,22,38,.72);
  scrollbar-width:none;
}
.tabs::-webkit-scrollbar{display:none}
.tabs__btn{
  padding:9px 17px;
  border-radius:999px;
  font-family:var(--font-num);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.tabs__btn:hover{color:var(--text);background:rgba(237,242,247,.06)}
.tabs__btn[aria-selected="true"]{background:var(--accent);color:#04140C}
.tabpanel[hidden]{display:none}

/* ============ FOLD (可展开内容组) ============ */
.fold-group{display:flex;flex-direction:column;gap:10px}
.fold{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(18,33,54,.55);
  overflow:hidden;
  transition:border-color .26s ease,background .26s ease;
}
.fold[open]{border-color:rgba(57,255,158,.36);background:rgba(18,33,54,.78)}
.fold > summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-head);
  font-weight:700;
  font-size:17px;
  line-height:1.4;
}
.fold > summary::-webkit-details-marker{display:none}
.fold__icon{
  position:relative;
  flex:none;
  width:24px;
  height:24px;
  border-radius:9px;
  background:rgba(57,255,158,.12);
}
.fold__icon::before,
.fold__icon::after{
  content:"";
  position:absolute;
  left:6px;
  right:6px;
  top:11px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transition:transform .26s var(--ease);
}
.fold__icon::after{transform:rotate(90deg)}
.fold[open] .fold__icon::after{transform:rotate(0deg)}
.fold__body{padding:0 18px 20px;font-size:15.5px;color:var(--muted)}
.fold__body p{max-width:66ch}
.fold__body p + p{margin-top:.9em}

/* ============ MEDIA ============ */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--radius-md);
  isolation:isolate;
  background-image:linear-gradient(140deg,rgba(28,107,74,.5),rgba(18,33,54,.94) 72%);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background-image:repeating-linear-gradient(115deg,rgba(237,242,247,.05) 0 1px,transparent 1px 9px);
  pointer-events:none;
}
.media img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media--21x9{aspect-ratio:21/9}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media__caption{
  position:absolute;
  z-index:2;
  left:14px;
  bottom:12px;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(10,22,38,.76);
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text);
}

/* ============ REVEAL ============ */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .6s ease,transform .6s var(--ease);
  will-change:opacity,transform;
}
.js-ready [data-reveal].is-in{opacity:1;transform:none}

/* ============ DESKTOP OFFSET ============ */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .split{grid-template-columns:minmax(240px,300px) minmax(0,1fr)}
  .split__aside{position:sticky;top:32px;align-self:start}
}

@media (min-width:720px){
  .footer__grid{grid-template-columns:repeat(2,1fr)}
  .footer__col--brand{grid-column:1/-1}
}
@media (min-width:1024px){
  .footer__grid{grid-template-columns:1.35fr 1fr 1fr}
  .footer__col--brand{grid-column:auto}
}

/* ============ MOBILE HEADER / DRAWER ============ */
@media (max-width:1023px){
  .site-header{
    position:sticky;
    top:0;
    left:0;
    width:100%;
    inset:auto;
    background:linear-gradient(180deg,#122136,#0A1626);
    border-bottom:1px solid var(--line);
  }
  .rail{
    flex-direction:row;
    align-items:center;
    height:auto;
    gap:0;
    padding:10px 16px;
    background-image:none;
    background-color:transparent;
    border-right:0;
  }
  .rail::before{display:none}
  .rail__top{flex:1 1 auto}
  .rail__quick{display:inline-flex}
  .nav-toggle{display:inline-flex}
  .rail__nav{
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    z-index:96;
    width:min(86vw,340px);
    display:flex;
    flex-direction:column;
    gap:20px;
    padding:88px 22px 28px;
    overflow-y:auto;
    background-image:linear-gradient(180deg,#122136,#0A1626 82%);
    border-right:1px solid rgba(237,242,247,.12);
    box-shadow:24px 0 60px rgba(3,8,16,.6);
    transform:translateX(-104%);
    visibility:hidden;
    transition:transform .3s var(--ease),visibility .3s linear;
  }
  .rail__nav::before{
    content:"栏目导航";
    display:block;
    font-family:var(--font-num);
    font-size:12px;
    letter-spacing:.24em;
    text-transform:uppercase;
    color:var(--accent);
  }
  .rail__nav[data-open]{transform:translateX(0);visibility:visible}
  .rail__nav[data-open] ~ .rail__scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:92;
    background:rgba(5,11,20,.66);
    border:0;
  }
  .rail__scrim{display:none}
  .rail__list{gap:6px}
  .rail__link{padding:14px 16px;font-size:17px}
  .rail__label{font-size:17px}
  .rail__meta{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
  .rail__link:hover{transform:none}
}

@media (max-width:480px){
  .rail__quick{padding:0 12px;font-size:13px;min-height:38px}
  .nav-toggle{padding:9px 12px}
  .brand__mark{width:38px;height:38px;border-radius:12px;font-size:16px}
  .brand__name{font-size:17px}
  .brand__tag{display:none}
  .footer__meta{justify-content:flex-start}
}

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