:root{
  --ink-900:#051713;
  --ink-800:#08251F;
  --ink-700:#0D332A;
  --signal:#47F5A5;
  --signal-soft:#A6FFD2;
  --track:#FF6B2C;
  --paper:#F3F7F4;
  --mute:#8FA79D;
  --cool:#5CC9D6;
  --line:#1D4A3F;

  --font-display:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","Roboto Mono",SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --cut:10px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(to right,rgba(29,74,63,.42) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(29,74,63,.26) 1px,transparent 1px);
  background-size:96px 96px;
  background-position:50% 0;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p,h1,h2,h3,h4,h5,h6,figure{margin:0}
table{border-collapse:collapse;width:100%}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.045em;
  line-height:1.08;
  text-wrap:balance;
}

strong{font-weight:700;color:var(--paper)}

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

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 容器 ---------- */
.shell{
  width:calc(100% - var(--gutter) * 2);
  max-width:var(--shell);
  margin-inline:auto;
}

#main-content{
  display:block;
  min-height:60vh;
  padding-bottom:clamp(40px,7vw,88px);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.03em;
  line-height:1.2;
  color:var(--paper);
  background:var(--ink-700);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{color:var(--signal-soft);border-color:var(--signal);background:var(--ink-700)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--signal-soft)}
.btn--signal{background:var(--signal);border-color:var(--signal);color:#04140F}
.btn--signal:hover{background:var(--signal-soft);border-color:var(--signal-soft);color:#04140F}
.btn--signal:focus-visible{box-shadow:inset 0 0 0 2px #04140F}
.btn--ghost{background:transparent;color:var(--signal-soft);border-color:var(--line)}
.btn--ghost:hover{background:rgba(71,245,165,.08);border-color:var(--signal);color:var(--signal-soft)}

/* ---------- 页头 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:400;
  padding:10px 18px;
  font-size:14px;font-weight:700;
  color:#04140F;
  background:var(--signal);
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(8,37,31,.95);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.scroll-meter{
  position:absolute;
  top:0;left:0;right:0;
  height:2px;
  background:rgba(29,74,63,.7);
  overflow:hidden;
  z-index:3;
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--signal),var(--cool) 55%,var(--track));
  will-change:transform;
}

.masthead{
  padding-block:18px 14px;
  transition:padding .2s ease;
}
.masthead__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}

.brand-sign{
  display:inline-flex;
  align-items:center;
  gap:10px;
  justify-self:start;
}
.brand-sign__mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  font-family:var(--font-mono);
  font-size:14px;font-weight:700;
  color:#04140F;
  background:var(--signal);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand-sign__text{
  display:flex;
  flex-direction:column;
  gap:2px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  line-height:1.3;
  color:var(--mute);
  text-transform:uppercase;
}
.brand-sign__text em{
  font-style:normal;
  color:var(--signal);
  letter-spacing:.22em;
}

.masthead__wordmark{
  position:relative;
  justify-self:center;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding-bottom:12px;
  font-family:var(--font-display);
  font-size:clamp(22px,3.2vw,38px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--paper);
  transition:font-size .2s ease;
}
.masthead__wordmark::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:52px;height:2px;
  transform:translateX(-50%);
  background:var(--signal);
}
.masthead__tagline{
  font-family:var(--font-mono);
  font-size:9.5px;
  font-weight:400;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--mute);
  transition:opacity .2s ease,height .2s ease,margin .2s ease;
}

.masthead__actions{
  display:flex;
  align-items:center;
  gap:10px;
  justify-self:end;
}

.nav-toggle{
  display:none;
  position:relative;
  width:44px;height:40px;
  border:1px solid var(--line);
  background:var(--ink-700);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.nav-toggle__bar{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  background:var(--signal);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle__bar:nth-child(1){top:13px}
.nav-toggle__bar:nth-child(2){top:19px}
.nav-toggle__bar:nth-child(3){top:25px}
.nav-toggle__label{
  position:absolute;
  width:1px;height:1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.site-nav{
  display:block;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:var(--ink-800);
}
.site-nav__list{
  width:calc(100% - var(--gutter) * 2);
  max-width:var(--shell);
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:2px;
  padding-block:5px;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:10px 16px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--mute);
  transition:color .18s ease,background .18s ease;
}
.site-nav__no{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:400;
  letter-spacing:.1em;
  color:var(--line);
}
.site-nav__link:hover{
  color:var(--paper);
  background:rgba(71,245,165,.07);
}
.site-nav__link[aria-current="page"]{color:var(--signal)}
.site-nav__link[aria-current="page"] .site-nav__no{color:var(--signal)}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:16px;right:16px;
  bottom:4px;
  height:2px;
  background:var(--signal);
}

.league-track{
  background:linear-gradient(100deg,rgba(13,51,42,.96),rgba(5,23,19,.92) 48%,rgba(13,51,42,.96));
  border-bottom:1px solid var(--line);
}
.league-track__inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:center;
  gap:16px;
  padding-block:8px;
}
.league-track__label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--track);
  white-space:nowrap;
}
.league-track__label::before{
  content:"";
  width:8px;height:8px;
  background:var(--track);
  clip-path:polygon(0 0,100% 0,100% 100%);
}
.league-track__list{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding-block:2px;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
  -webkit-overflow-scrolling:touch;
}
.league-track__list::-webkit-scrollbar{height:4px}
.league-track__list::-webkit-scrollbar-thumb{background:var(--line)}

.league-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 15px;
  white-space:nowrap;
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--mute);
  background:rgba(13,51,42,.62);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.league-chip__no{
  font-family:var(--font-mono);
  font-size:10px;
  opacity:.62;
}
.league-chip:hover{color:var(--paper);border-color:var(--signal)}
.league-chip:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--signal-soft)}
.league-chip[aria-pressed="true"]{
  color:#04140F;
  background:var(--signal);
  border-color:var(--signal);
}
.league-chip[aria-pressed="true"] .league-chip__no{opacity:.72}
.league-chip[aria-pressed="true"]:focus-visible{box-shadow:inset 0 0 0 2px #04140F}

.site-header[data-stuck] .masthead{padding-block:11px 9px}
.site-header[data-stuck] .masthead__tagline{
  opacity:0;
  height:0;
  margin:0;
  overflow:hidden;
}
@media (min-width:861px){
  .site-header[data-stuck] .masthead__wordmark{font-size:26px}
}

/* ---------- 基础组件 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-top:18px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--mute);
}
.breadcrumb a{color:var(--mute);transition:color .16s ease}
.breadcrumb a:hover{color:var(--signal)}
.breadcrumb__sep{color:var(--line)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--signal);
}
.eyebrow::before{
  content:"";
  width:24px;height:1px;
  background:var(--track);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--signal-soft);
  background:rgba(71,245,165,.06);
  border:1px solid rgba(71,245,165,.3);
}
.tag--track{
  color:var(--track);
  background:rgba(255,107,44,.08);
  border-color:rgba(255,107,44,.32);
}
.tag--cool{
  color:var(--cool);
  background:rgba(92,201,214,.08);
  border-color:rgba(92,201,214,.32);
}

.panel{
  position:relative;
  padding:clamp(18px,2.6vw,28px);
  background:var(--ink-700);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
}
.panel--flat{background:transparent}
.panel--signal{border-color:rgba(71,245,165,.38)}

.frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 10;
  background:var(--ink-700);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 32px),calc(100% - 32px) 100%,0 100%);
}
.frame--wide{aspect-ratio:21 / 9}
.frame--tall{aspect-ratio:4 / 5}
.frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.06) brightness(.92);
  transition:transform .5s ease;
}
.frame:hover .frame__img{transform:scale(1.03)}
.frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(to top,rgba(5,23,19,.88),rgba(5,23,19,0) 58%),
    linear-gradient(120deg,rgba(71,245,165,.18),rgba(5,23,19,0) 42%);
}
.frame__label{
  position:absolute;
  left:0;bottom:0;
  z-index:1;
  padding:6px 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--signal-soft);
  background:rgba(5,23,19,.84);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
}

.rule{
  height:1px;
  border:0;
  margin-block:clamp(24px,4vw,40px);
  background:linear-gradient(to right,var(--line),rgba(29,74,63,.04));
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(12px,1.6vw,20px);
}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px 24px;
  padding-bottom:14px;
  margin-bottom:clamp(18px,3vw,30px);
  border-bottom:1px solid var(--line);
}
.section-head__title{
  font-size:clamp(24px,3.4vw,38px);
  letter-spacing:-.045em;
}
.section-head__note{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mute);
}

.lede{
  max-width:64ch;
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.85;
  color:#CFE0D8;
}
.prose{max-width:68ch}
.prose p + p{margin-top:1em}

.num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--signal);
}

.meta-line{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--mute);
}
.meta-line__dot{
  display:inline-block;
  width:4px;height:4px;
  background:var(--line);
}

.disclosure{
  background:var(--ink-700);
  border:1px solid var(--line);
}
.disclosure + .disclosure{margin-top:10px}
.disclosure__btn{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 18px;
  list-style:none;
  cursor:pointer;
  font-size:15.5px;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--paper);
  transition:color .16s ease;
}
.disclosure__btn::-webkit-details-marker{display:none}
.disclosure__btn::after{
  content:"+";
  flex:none;
  font-family:var(--font-mono);
  font-size:18px;
  color:var(--signal);
}
.disclosure[open] > .disclosure__btn{color:var(--signal)}
.disclosure[open] > .disclosure__btn::after{content:"–"}
.disclosure__panel{
  padding:0 18px 16px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--mute);
}

.data-table{font-size:14px}
.data-table th,
.data-table td{
  padding:10px 12px;
  text-align:left;
  border-bottom:1px solid var(--line);
}
.data-table th{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mute);
}
.data-table td{font-variant-numeric:tabular-nums}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-800);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--signal),var(--cool) 46%,var(--track));
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.35fr 1fr;
  gap:clamp(22px,3vw,48px);
  padding-block:clamp(34px,5vw,58px) 30px;
}

.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:900;
  letter-spacing:-.05em;
  line-height:1.1;
  color:var(--paper);
}
.footer-brand__mark{
  display:inline-block;
  margin-top:8px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--signal);
  border:1px solid var(--line);
}
.footer-brand__note{
  margin-top:14px;
  max-width:36ch;
  font-size:13.5px;
  line-height:1.8;
  color:var(--mute);
}

.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--track);
  padding-bottom:10px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
}

.footer-nav__list{
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-nav__link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--mute);
  transition:color .16s ease;
}
.footer-nav__link::before{
  content:"›";
  font-family:var(--font-mono);
  color:var(--line);
}
.footer-nav__link:hover{color:var(--signal)}
.footer-nav__link:hover::before{color:var(--signal)}

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-contact__row{
  display:grid;
  gap:2px;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cool);
}
.footer-contact__val{
  font-size:13.5px;
  line-height:1.6;
  color:var(--paper);
  overflow-wrap:anywhere;
}

.footer-legal{
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-legal__link{
  display:inline-block;
  font-size:13.5px;
  color:var(--paper);
  padding-bottom:4px;
  border-bottom:1px solid var(--line);
  transition:color .16s ease,border-color .16s ease;
}
.footer-legal__link:hover{color:var(--signal);border-color:var(--signal)}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 20px;
  padding-block:16px 24px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mute);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:860px){
  .nav-toggle{display:block}

  .site-nav{display:none}
  .site-header[data-open] .site-nav{
    display:block;
    max-height:68vh;
    overflow-y:auto;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding-block:6px 12px;
  }
  .site-nav__link{
    width:100%;
    padding:14px 8px;
    font-size:16px;
    border-bottom:1px solid rgba(29,74,63,.62);
  }
  .site-nav__link[aria-current="page"]::after{
    left:8px;right:auto;
    width:24px;
    bottom:0;
  }

  .masthead__inner{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px 14px;
  }
  .masthead__wordmark{
    order:0;
    flex:1 1 100%;
    align-items:flex-start;
    padding-bottom:10px;
  }
  .masthead__wordmark::after{
    left:0;
    transform:none;
    width:44px;
  }
  .brand-sign{order:1}
  .masthead__actions{order:2;margin-left:auto}
  .brand-sign__text{display:none}

  .league-track__inner{
    grid-template-columns:1fr;
    gap:6px;
    padding-block:7px 9px;
  }
  .league-track__label{font-size:10px;letter-spacing:.18em}

  .section-head{align-items:flex-start}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}

@media (max-width:560px){
  body{background-size:64px 64px}
  .masthead__wordmark{font-size:22px}
  .masthead__actions{gap:8px;width:100%;justify-content:space-between}
  .masthead__actions .btn{padding:9px 12px;font-size:13px}
  .nav-toggle{width:42px;height:38px}
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .frame{clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%)}
}

@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;
  }
  .frame:hover .frame__img{transform:none}
}