:root{
  --night:#07111C;
  --ink:#0B1B2B;
  --stand:#12314A;
  --glass:#1E4A5A;
  --cyan:#38E8D1;
  --cyan-soft:#A9F3E8;
  --amber:#F2B44B;
  --amber-hi:#F7C264;
  --paper:#F4EEDF;
  --paper-ink:#221A16;
  --text:#E8F1F2;
  --league-1:#6E8FA3;
  --league-2:#8B7AA8;
  --league-3:#C77D6A;
  --league-4:#7FA37A;
  --line:rgba(56,232,209,.26);
  --line-soft:rgba(232,241,242,.14);
  --font-display:"Oswald","Barlow Condensed","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --shell:1220px;
  --gutter:clamp(16px,4vw,48px);
  --t:.26s ease;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

body{
  min-height:100vh;
  background-color:var(--night);
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(15px,0.35vw + 14px,17px);
  line-height:1.75;
  letter-spacing:.01em;
  background-image:
    repeating-linear-gradient(90deg,rgba(56,232,209,.055) 0 1px,transparent 1px 120px),
    repeating-linear-gradient(0deg,rgba(56,232,209,.045) 0 1px,transparent 1px 120px),
    radial-gradient(90% 60% at 85% -5%,rgba(30,74,90,.55),transparent 62%);
  background-attachment:fixed;
}
::selection{background:var(--cyan);color:var(--night)}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.12;letter-spacing:.005em}
strong{font-weight:700;color:var(--cyan-soft)}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}

.display{font-family:var(--font-display);font-weight:800;font-stretch:92%;font-size:clamp(34px,5.4vw,66px);line-height:1.04;letter-spacing:-.005em}
.lede{max-width:60ch;font-size:clamp(15.5px,1.2vw,18px);line-height:1.8;color:rgba(232,241,242,.8)}
.prose{max-width:68ch}
.prose p + p{margin-top:1em}
.prose a{color:var(--cyan-soft);border-bottom:1px solid rgba(56,232,209,.45)}
.prose a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.rule{height:1px;border:0;margin-block:clamp(20px,3vw,36px);background:linear-gradient(90deg,var(--cyan),rgba(56,232,209,0))}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:7px;height:7px;background:var(--cyan);transform:rotate(45deg);flex:0 0 auto}
.index-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:var(--cyan);font-weight:400}

.section{padding-block:clamp(36px,6vw,80px)}
.section--paper{background:var(--paper);color:var(--paper-ink)}
.section--paper .lede,.section--paper .prose{color:#3b322c}
.section--paper .eyebrow{color:#8c5a12}
.section--paper .eyebrow::before{background:var(--amber)}
.section--paper .section__title{color:var(--paper-ink)}
.section--glass{
  background:linear-gradient(160deg,rgba(30,74,90,.55),rgba(7,17,28,.5));
  border-block:1px solid rgba(56,232,209,.22);
  backdrop-filter:blur(8px);
}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:14px;margin-bottom:clamp(18px,2.6vw,34px);
}
.section__title{font-size:clamp(24px,3vw,38px);font-stretch:92%}

.grid{display:grid;gap:clamp(14px,2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

.panel{
  border:1px solid var(--line-soft);
  background:rgba(18,49,74,.45);
  padding:clamp(16px,2.2vw,26px);
  transition:border-color var(--t),background var(--t),transform var(--t);
}
.panel:hover,.panel:focus-within{
  border-color:var(--cyan);
  background:rgba(18,49,74,.65);
  transform:rotate(-.6deg) translateY(-2px);
}
.panel--glass{
  background:rgba(30,74,90,.48);
  backdrop-filter:blur(10px);
  border-color:rgba(56,232,209,.3);
}
.panel--paper{background:var(--paper);color:var(--paper-ink);border-color:rgba(34,26,22,.18)}
.panel--paper:hover,.panel--paper:focus-within{background:#faf5e8;border-color:#8c5a12}

.tag{
  display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  padding:3px 8px;border:1px solid var(--line);color:var(--cyan-soft);
}
.tag--amber{border-color:var(--amber);color:var(--amber)}

.stat{border-left:2px solid var(--cyan);padding-left:12px}
.stat__value{display:block;font-family:var(--font-display);font-weight:800;font-size:clamp(22px,3vw,32px);line-height:1.1}
.stat__label{display:block;margin-top:4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:rgba(169,243,232,.75)}

.coord-pin{
  position:relative;display:inline-grid;place-items:center;
  width:30px;height:30px;border:1px solid var(--cyan);
  background:rgba(56,232,209,.1);
}
.coord-pin::before{content:"";width:10px;height:10px;border:1px solid var(--cyan);transform:rotate(45deg)}
.coord-pin:hover,.coord-pin:focus-visible{animation:pin-pulse .5s ease 1}
@keyframes pin-pulse{0%,100%{translate:0 0}50%{translate:0 -2px}}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;font-weight:700;
  padding:11px 18px;border:1px solid transparent;border-radius:2px;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t);
}
.btn:hover{transform:translateY(-1px)}
.btn--amber{background:var(--amber);border-color:var(--amber);color:var(--night)}
.btn--amber:hover{background:var(--amber-hi);border-color:var(--amber-hi)}
.btn--ghost{border-color:rgba(56,232,209,.5);color:var(--cyan-soft)}
.btn--ghost:hover{background:rgba(56,232,209,.14);border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:8px 13px;font-size:12px}

.breadcrumb{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding-block:16px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(169,243,232,.7);
}
.breadcrumb a{color:var(--cyan-soft);border-bottom:1px solid rgba(56,232,209,.35)}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--text)}

.figure{
  position:relative;margin:0;overflow:hidden;
  border:1px solid rgba(56,232,209,.22);
  background:linear-gradient(150deg,rgba(30,74,90,.6),rgba(7,17,28,.94));
}
.figure__media{
  position:relative;display:grid;place-items:center;
  width:100%;aspect-ratio:16 / 9;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:rgba(169,243,232,.6);
  background-image:
    repeating-linear-gradient(90deg,rgba(56,232,209,.12) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(56,232,209,.1) 0 1px,transparent 1px 44px);
}
.figure__media img{width:100%;height:100%;object-fit:cover}
.figure__caption{
  padding:10px 12px;font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;
  color:rgba(169,243,232,.82);border-top:1px solid rgba(56,232,209,.18);
}
.figure--wide .figure__media{aspect-ratio:21 / 9}
.figure--tall .figure__media{aspect-ratio:3 / 4}
.section--paper .figure{border-color:rgba(34,26,22,.18);background:#e9e1cd}
.section--paper .figure__caption{color:#4b3f36;border-top-color:rgba(34,26,22,.16)}

/* ============ 头部 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,17,28,.95);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.skip-link{
  position:absolute;top:-100px;left:16px;z-index:200;
  padding:10px 16px;background:var(--amber);color:var(--night);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;font-weight:700;
  transition:top .2s ease;
}
.skip-link:focus{top:8px}

.scroll-progress{
  position:absolute;left:0;right:0;top:0;height:2px;z-index:5;
  background:var(--cyan);transform:scaleX(0);transform-origin:0 50%;
  box-shadow:0 0 10px rgba(56,232,209,.6);
}

.header-utility{
  background:linear-gradient(90deg,rgba(30,74,90,.6),rgba(11,27,43,.25));
  border-bottom:1px solid rgba(56,232,209,.18);
}
.header-utility__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:34px;padding-block:6px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
}
.utility-brand{display:inline-flex;align-items:center;gap:9px;color:var(--cyan-soft)}
.utility-pin{
  flex:0 0 auto;width:7px;height:7px;background:var(--cyan);transform:rotate(45deg);
  box-shadow:0 0 0 3px rgba(56,232,209,.14);
}
.utility-meta{color:rgba(169,243,232,.66);text-align:right}

.header-main__inner{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:clamp(12px,2vw,28px);
  padding-block:12px;
}

.brand{display:inline-flex;align-items:center;gap:12px}
.brand__mark{
  position:relative;display:grid;place-items:center;width:34px;height:34px;
  border:1px solid var(--cyan);
  background:linear-gradient(160deg,rgba(56,232,209,.18),transparent);
}
.brand__mark::before{content:"";width:14px;height:14px;border:1px solid rgba(56,232,209,.7);transform:rotate(45deg)}
.brand__mark-dot{position:absolute;width:4px;height:4px;background:var(--amber);border-radius:50%}
.brand__text{display:flex;flex-direction:column;line-height:1.05}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:20px;letter-spacing:.06em}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;color:var(--cyan-soft)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--line);border-radius:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--cyan-soft);background:rgba(30,74,90,.4);
  transition:border-color var(--t),color var(--t),background var(--t);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px}
.nav-toggle__bars span{display:block;width:16px;height:1px;background:currentColor;transition:transform var(--t),opacity var(--t)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(56,232,209,.12)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.site-nav__link{
  position:relative;display:block;padding:10px 11px;
  font-size:15px;font-weight:500;color:rgba(232,241,242,.85);
  border:1px solid transparent;border-radius:2px;
  transition:color var(--t),border-color var(--t),background var(--t);
}
.site-nav__link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:5px;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform .28s ease;
}
.site-nav__link:hover,.site-nav__link:focus-visible{
  color:var(--cyan);border-color:rgba(56,232,209,.26);background:rgba(30,74,90,.38);
}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{
  color:var(--night);background:var(--cyan);border-color:var(--cyan);font-weight:700;
}
.site-nav__link[aria-current="page"]::after{display:none}
.site-nav__cta{display:none}

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

.league-band{
  background:rgba(7,17,28,.92);
  border-top:1px solid rgba(56,232,209,.12);
}
.league-band__inner{display:flex;align-items:center;gap:14px;padding-block:8px}
.league-band__label{
  flex:0 0 auto;padding-right:12px;border-right:1px solid rgba(56,232,209,.25);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:rgba(169,243,232,.7);
  white-space:nowrap;
}
.league-band__list{
  display:flex;align-items:center;gap:6px;flex:1 1 auto;
  overflow-x:auto;padding-block:2px;scrollbar-width:thin;
}
.league-band__list::-webkit-scrollbar{height:4px}
.league-band__list::-webkit-scrollbar-thumb{background:rgba(56,232,209,.4)}
.league-band__item{flex:0 0 auto}
.league-band__link{
  position:relative;display:inline-block;white-space:nowrap;
  padding:5px 10px 5px 22px;
  font-size:13px;color:rgba(232,241,242,.82);
  border:1px solid var(--line-soft);border-radius:2px;
  transition:color var(--t),background var(--t),border-color var(--t);
}
.league-band__link::before{
  content:"";position:absolute;left:9px;top:50%;translate:0 -50%;
  width:4px;height:14px;background:var(--league-tint,rgba(56,232,209,.75));
}
.league-band__link[data-league="1"]{--league-tint:var(--league-1)}
.league-band__link[data-league="2"]{--league-tint:var(--league-2)}
.league-band__link[data-league="3"]{--league-tint:var(--league-3)}
.league-band__link[data-league="4"]{--league-tint:var(--league-4)}
.league-band__link[data-league="5"]{--league-tint:#9aa7b4}
.league-band__link[data-league="6"]{--league-tint:var(--cyan)}
.league-band__link:hover,.league-band__link:focus-visible{
  color:var(--night);background:var(--league-tint);border-color:var(--league-tint);
}
.league-band__link:hover::before,.league-band__link:focus-visible::before{background:rgba(7,17,28,.55)}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,rgba(11,27,43,.98),var(--night) 72%);
  border-top:1px solid var(--line);
  color:var(--text);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);opacity:.55;
}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(24px,4vw,64px);
  padding-block:clamp(32px,5vw,60px) clamp(24px,3vw,40px);
}
.footer-brand__name{font-family:var(--font-display);font-weight:800;font-size:clamp(22px,2.4vw,28px);letter-spacing:.05em}
.footer-brand__note{max-width:44ch;margin-top:10px;font-size:14.5px;line-height:1.8;color:rgba(232,241,242,.72)}
.footer-coord{
  display:inline-flex;align-items:center;gap:9px;margin-top:14px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--cyan);
}
.footer-coord::before{content:"";width:7px;height:7px;background:var(--cyan);transform:rotate(45deg)}

.footer-contact{margin-top:18px;display:grid;gap:8px}
.footer-contact__row{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:8px 10px;border:1px solid rgba(56,232,209,.16);
  background:rgba(18,49,74,.38);
  font-family:var(--font-mono);font-size:12.5px;
}
.footer-contact__label{min-width:62px;letter-spacing:.1em;color:rgba(169,243,232,.7)}
.footer-contact__value{letter-spacing:.02em;word-break:break-all}
.copy-btn{
  margin-left:auto;padding:3px 9px;
  border:1px solid rgba(56,232,209,.4);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--cyan-soft);
  transition:background var(--t),color var(--t),border-color var(--t);
}
.copy-btn:hover,.copy-btn:focus-visible{background:rgba(56,232,209,.16);border-color:var(--cyan);color:var(--cyan)}
.copy-btn.is-copied{background:var(--cyan);border-color:var(--cyan);color:var(--night)}
.copy-status{min-height:18px;margin-top:6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--cyan)}

.footer-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(16px,3vw,40px);align-content:start}
.footer-col__title{
  padding-bottom:10px;border-bottom:1px solid rgba(56,232,209,.2);
  font-family:var(--font-mono);font-size:11.5px;font-weight:600;letter-spacing:.2em;color:var(--amber);
}
.footer-links{margin-top:12px;display:grid;gap:2px}
.footer-link{
  display:inline-block;padding:6px 0;font-size:14.5px;
  color:rgba(232,241,242,.82);
  transition:color var(--t),padding-left var(--t);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan);padding-left:10px}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px 20px;padding-block:18px 24px;
  border-top:1px solid rgba(56,232,209,.16);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:rgba(232,241,242,.6);
}
.footer-privacy{display:flex;flex-wrap:wrap;gap:6px 16px}
.footer-legal__link{color:var(--cyan-soft);border-bottom:1px solid transparent;transition:color var(--t),border-color var(--t)}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.to-top{
  display:inline-flex;align-items:center;gap:6px;padding:6px 11px;
  border:1px solid rgba(56,232,209,.36);border-radius:2px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--cyan-soft);
  transition:background var(--t),color var(--t),border-color var(--t);
}
.to-top:hover,.to-top:focus-visible{background:rgba(56,232,209,.14);border-color:var(--cyan);color:var(--cyan)}
.to-top span{transition:transform var(--t)}
.to-top:hover span{transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .header-main__inner{grid-template-columns:minmax(0,1fr) auto;gap:10px;padding-block:10px}
  .nav-toggle{display:inline-flex;justify-self:end}
  .header-actions{display:none}
  .site-nav{
    grid-column:1 / -1;width:100%;
    max-height:0;overflow:hidden;opacity:0;
    transition:max-height .32s ease,opacity .24s ease;
  }
  .site-nav[data-open]{max-height:72vh;overflow-y:auto;opacity:1;padding-bottom:10px}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{padding:14px 4px;border:0;border-bottom:1px solid rgba(56,232,209,.14);border-left:2px solid transparent;border-radius:0}
  .site-nav__link::after{display:none}
  .site-nav__link:hover,.site-nav__link:focus-visible{
    border-left-color:var(--cyan);background:rgba(30,74,90,.5);color:var(--cyan);
  }
  .site-nav__link[aria-current="page"]{
    background:rgba(56,232,209,.16);color:var(--cyan);border-left-color:var(--cyan);border-bottom-color:rgba(56,232,209,.3);
  }
  .site-nav__cta{display:inline-flex;margin:14px 4px 4px}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .league-band__label{border-right:0;padding-right:0}
}
@media (max-width:760px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .header-utility__inner{flex-direction:column;align-items:flex-start;gap:2px}
  .utility-meta{text-align:left}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .footer-bottom{font-size:11px}
}
@media (max-width:480px){
  .brand__sub{display:none}
  .footer-contact__row{gap:6px}
  .footer-contact__label{min-width:100%}
  .footer-columns{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .panel:hover,.panel:focus-within{transform:none}
  .coord-pin:hover,.coord-pin:focus-visible{animation:none}
  .btn:hover{transform:none}
  .to-top:hover span{transform:none}
}