/* ============================================================
   28体育赛场 — 全站共享样式 /assets/site.css
   基调：被反复折叠的战术板 · 炭黑网格 · 深墨绿分区 · 奶油纸核对页
   ============================================================ */

/* ---------- reset ---------- */
*,*::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,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- tokens ---------- */
:root{
  --ink:#0C1310;
  --pitch:#123A2C;
  --turf:#1E5340;
  --cream:#F1E7D3;
  --lime:#C8F44E;
  --ember:#FF7A2B;
  --amber:#F0B429;
  --teal:#35C2C8;
  --heat:#E2453C;
  --mist:#8FA39A;
  --grid:rgba(200,244,78,0.12);

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

  --shell:min(1440px,100% - 48px);
  --gap:24px;
  --pad-card:32px;
  --line:1px solid var(--turf);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- base ---------- */
body{
  background-color:var(--ink);
  background-image:
    linear-gradient(var(--grid) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:96px 96px,96px 96px;
  color:var(--cream);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
#main-content{display:block;scroll-margin-top:96px}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:300;
  text-transform:uppercase;
  letter-spacing:-.01em;
  line-height:1;
  color:var(--cream);
}
.display-xl{font-size:clamp(46px,7vw,88px);letter-spacing:-.02em}
.display-lg{font-size:clamp(34px,4.6vw,56px)}
.display-md{font-size:clamp(24px,2.6vw,34px)}

p{max-width:76ch}
.prose{max-width:680px;font-size:16px;line-height:1.75}
.prose p + p{margin-top:1em}
.lede{font-size:clamp(17px,1.4vw,20px);line-height:1.7;color:rgba(241,231,211,.82)}

.index-tag,
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--lime);flex:0 0 auto}

.num,.num-chip,.stat__value,.data-table .is-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
}
.num-chip{padding:1px 6px;background:rgba(200,244,78,.16);color:var(--lime)}

:focus-visible{outline:2px solid var(--lime);outline-offset:3px}

/* ---------- layout ---------- */
.shell{width:var(--shell);margin-inline:auto}
.section{padding-block:clamp(48px,7vw,96px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:20px;margin-bottom:clamp(24px,3vw,40px);
}
.section-head__title{
  font-family:var(--font-display);font-weight:300;text-transform:uppercase;
  font-size:clamp(28px,3.4vw,44px);line-height:1;letter-spacing:-.01em;
}
.section-head__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--mist)}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.grid-auto{display:grid;gap:var(--gap);grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}

/* ---------- breadcrumb ---------- */
.breadcrumb{width:var(--shell);margin-inline:auto;padding-top:28px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}
.breadcrumb li{display:inline-flex;align-items:center}
.breadcrumb li + li::before{content:"/";margin-inline:8px;color:var(--turf)}
.breadcrumb a{color:var(--mist);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb [aria-current="page"]{color:var(--cream)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 20px;border:1px solid transparent;border-radius:0;
  font-family:var(--font-display);font-size:13px;font-weight:400;
  text-transform:uppercase;letter-spacing:.14em;line-height:1;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--signal{background:var(--lime);color:var(--ink)}
.btn--signal:hover{background:var(--ember);color:var(--ink)}
.btn--ghost{border-color:var(--turf);color:var(--cream)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;top:0;left:-9999px;z-index:400;
  background:var(--lime);color:var(--ink);
  padding:12px 18px;font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
}
.skip-link:focus{left:16px;top:16px}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--teal),var(--lime));
  transform:scaleX(0);transform-origin:0 50%;
  z-index:300;pointer-events:none;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(12,19,16,.94);
  border-bottom:1px solid var(--turf);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.site-header__inner{
  width:var(--shell);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;padding-block:16px;
}
.site-header__brand{display:flex;align-items:baseline;gap:16px;min-width:0}
.brand-mark{
  font-family:var(--font-display);font-size:clamp(18px,2vw,24px);font-weight:400;
  text-transform:uppercase;letter-spacing:.06em;line-height:1;
  color:var(--cream);white-space:nowrap;
}
.brand-mark__accent{color:var(--lime)}
.brand-note{
  display:none;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--mist);white-space:nowrap;
}
.site-header__right{display:flex;align-items:center;gap:26px;margin-left:auto}
.site-header__modules{display:none}
.module-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--mist);
  white-space:nowrap;
}
.module-tag::before{content:"";width:5px;height:5px;background:var(--turf);flex:0 0 auto}

.site-nav{display:flex;align-items:center;gap:22px}
.site-nav__link{
  position:relative;display:inline-block;
  padding-block:6px;font-size:14px;line-height:1.4;
  color:var(--mist);transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.site-nav__link:hover{color:var(--cream)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--lime)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.site-header__cta{flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  border:1px solid var(--turf);padding:10px 14px;border-radius:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--cream);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle__bar{position:relative;display:block;width:18px;height:9px;flex:0 0 auto}
.nav-toggle__bar::before,
.nav-toggle__bar::after{content:"";position:absolute;left:0;right:0;height:1px;background:currentColor}
.nav-toggle__bar::before{top:0}
.nav-toggle__bar::after{bottom:0}

/* ---------- footer ---------- */
.site-footer{
  background:var(--pitch);
  border-top:1px solid var(--lime);
  margin-top:clamp(64px,9vw,128px);
}
.site-footer__top{
  width:var(--shell);margin-inline:auto;
  display:grid;grid-template-columns:1fr;
  gap:40px;padding-block:clamp(44px,6vw,72px);
}
.site-footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.site-footer__tagline{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--lime);
}
.site-footer__note{font-size:14px;line-height:1.7;color:var(--mist);max-width:34ch}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mist);
  padding-bottom:10px;margin-bottom:16px;border-bottom:1px solid var(--turf);
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,
.footer-index__item{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;line-height:1.5;color:rgba(241,231,211,.8);
  transition:color .18s var(--ease);
}
.footer-col a:hover{color:var(--lime)}
.footer-index__item::before{content:"";width:5px;height:5px;background:var(--amber);flex:0 0 auto}

.site-footer__band{border-top:1px solid var(--turf);background:rgba(12,19,16,.72)}
.site-footer__band-inner{
  width:var(--shell);margin-inline:auto;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 30px;
  padding-block:18px;
}
.footer-meta{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;
  color:var(--mist);line-height:1.6;
}
.footer-meta--wide{color:rgba(143,163,154,.8)}

/* ---------- panels & data ---------- */
.panel{background:rgba(18,58,44,.55);border:1px solid var(--turf);border-radius:0;padding:var(--pad-card)}
.panel--ink{background:rgba(12,19,16,.72)}
.panel--cream{background:var(--cream);border-color:var(--cream);color:var(--ink)}
.panel--cream .stat__label,
.panel--cream .index-tag,
.panel--cream .stat__label{color:#5c6a63}

.table-wrap{
  overflow-x:auto;border:1px solid var(--turf);
  background:rgba(12,19,16,.5);
  -webkit-overflow-scrolling:touch;
}
.data-table{font-size:14px;min-width:640px}
.data-table th{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.1em;text-transform:uppercase;color:var(--mist);
  text-align:left;white-space:nowrap;padding:12px 16px;
  border-bottom:1px solid var(--turf);background:rgba(18,58,44,.35);
}
.data-table td{
  padding:8px 16px;height:36px;color:var(--cream);
  border-bottom:1px solid var(--grid);vertical-align:middle;
}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover td{background:rgba(200,244,78,.06)}
.data-table .is-num{text-align:right;white-space:nowrap}

.stat{display:flex;flex-direction:column;gap:8px}
.stat__value{font-size:clamp(28px,3vw,44px);line-height:1;letter-spacing:-.02em;color:var(--cream)}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--mist)}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--turf);border-radius:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
  white-space:nowrap;
}
.chip--lime{border-color:var(--lime);color:var(--lime)}
.chip--amber{border-color:var(--amber);color:var(--amber)}
.chip--ember{border-color:var(--ember);color:var(--ember)}

.ramp{height:6px;width:100%;background:linear-gradient(90deg,var(--teal) 0%,var(--amber) 52%,var(--heat) 100%)}
.legend{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.legend__item{display:inline-flex;align-items:center;gap:8px}
.legend__dot{width:6px;height:6px;flex:0 0 auto}
.legend__dot--teal{background:var(--teal)}
.legend__dot--amber{background:var(--amber)}
.legend__dot--heat{background:var(--heat)}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  overflow:hidden;border:1px solid var(--turf);border-radius:0;
  background:linear-gradient(140deg,var(--pitch),var(--ink));
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  border:1px solid rgba(200,244,78,.18);
}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame__caption{
  position:absolute;left:0;bottom:0;right:0;
  padding:10px 14px;background:rgba(12,19,16,.78);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}

/* ---------- reveal ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(8px);
  transition:opacity 240ms var(--ease),transform 240ms var(--ease)}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (min-width:720px){
  .brand-note{display:inline}
}
@media (min-width:760px){
  .site-footer__top{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px}
}
@media (min-width:1180px){
  .site-header__modules{display:flex;align-items:center;gap:18px}
  .site-header__right{gap:32px}
}
@media (max-width:1180px){
  .site-nav{gap:18px}
}
@media (max-width:960px){
  .site-header__inner{flex-wrap:wrap;gap:0;padding-block:14px}
  .site-header__brand{flex:1 1 auto;min-width:0}
  .nav-toggle{display:inline-flex;order:2;flex:0 0 auto}
  .site-header__right{
    order:3;flex:1 0 100%;
    flex-direction:column;align-items:stretch;gap:0;margin-left:0;
    max-height:0;overflow:hidden;opacity:0;
    transition:max-height .3s var(--ease),opacity .22s var(--ease);
  }
  .site-header[data-open="true"] .site-header__right{max-height:240px;opacity:1;margin-top:4px}
  .site-header__modules{display:none}
  .site-nav{
    flex-wrap:nowrap;justify-content:flex-start;
    overflow-x:auto;overflow-y:hidden;
    gap:8px;padding:12px 0 14px;white-space:nowrap;
    border-top:1px solid var(--turf);
    scrollbar-width:thin;scrollbar-color:var(--turf) transparent;
    -webkit-overflow-scrolling:touch;
  }
  .site-nav::-webkit-scrollbar{height:4px}
  .site-nav::-webkit-scrollbar-thumb{background:var(--turf)}
  .site-nav__link{
    flex:0 0 auto;padding:7px 14px;font-size:13px;
    border:1px solid var(--turf);color:var(--cream);
  }
  .site-nav__link::after{display:none}
  .site-nav__link:hover{border-color:var(--lime);color:var(--lime)}
  .site-nav__link[aria-current="page"]{
    background:rgba(200,244,78,.12);border-color:var(--lime);color:var(--lime);
  }
  .site-header__cta{display:none}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  :root{--pad-card:24px}
}
@media (max-width:600px){
  :root{--shell:min(1440px,100% - 32px);--gap:16px}
  body{font-size:16px}
  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr))}
  .site-footer__top{gap:32px}
  .breadcrumb ol{font-size:11px}
}

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