/* =========================================================
   开元体育 · 共享站点样式 /assets/site.css
   夜间球场数据板：炭黑底 + 深墨绿分区 + 荧光青柠锚点
   ========================================================= */

/* ---------- 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{max-width:100%;display:block;}
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;}
strong,b{font-weight:700;}

/* ---------- tokens ---------- */
:root{
  --c-ink:#0A0E0C;
  --c-deep:#10231B;
  --c-surface:#163024;
  --c-line:#26483A;
  --c-lime:#C9F24D;
  --c-amber:#E3A93B;
  --c-cinnabar:#E24B3C;
  --c-white:#F1F5F0;
  --c-cream:#DCE6D8;
  --c-slate:#8E9C93;
  --c-turf:#1E3D2C;

  --font-head:"Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:Inter,"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1320px;
  --gutter:clamp(16px,3vw,40px);
  --rail:260px;
  --hdr-h:84px;
  --hdr-h-condensed:56px;
  --radius:2px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- base ---------- */
html,body{min-height:100%;}
body{
  background:var(--c-ink);
  color:var(--c-white);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,18px);
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--c-white);
}
h1{font-size:clamp(28px,4.2vw,64px);}
h2{font-size:clamp(22px,2.6vw,36px);}
h3{font-size:clamp(18px,1.7vw,22px);}
p{color:var(--c-cream);}
::selection{background:var(--c-lime);color:var(--c-ink);}
:focus-visible{outline:2px solid var(--c-lime);outline-offset:2px;}
#main-content{display:block;scroll-margin-top:calc(var(--hdr-h-condensed) + 16px);}

/* ---------- layout helpers ---------- */
.shell{width:min(100% - (var(--gutter) * 2), var(--shell));margin-inline:auto;}
.section{padding-block:clamp(48px,7vw,104px);}
.section + .section{border-top:1px solid var(--c-line);}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  gap:14px clamp(20px,3vw,40px);
  margin-bottom:clamp(24px,3vw,44px);
}
.chapter-no{
  font-family:var(--font-mono);
  font-size:clamp(44px,7vw,120px);
  line-height:.8;
  letter-spacing:-.05em;
  color:var(--c-lime);
  margin-right:-.06em;
  font-variant-numeric:tabular-nums;
}
.eyebrow{
  display:inline-block;
  font-size:12px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--c-amber);
}
.lede{max-width:64ch;color:var(--c-cream);}
.divider{height:1px;background:var(--c-line);}
.rule-lime{height:1px;background:linear-gradient(90deg,var(--c-lime) 0 72px,var(--c-line) 72px 100%);}
.prose{max-width:72ch;}
.prose p + p{margin-top:1em;}
.prose h2{margin:2.2em 0 .7em;font-size:clamp(20px,2.2vw,30px);}
.prose h3{margin:1.8em 0 .6em;color:var(--c-cream);}
.prose ul,.prose ol{margin:1em 0 1em 1.1em;color:var(--c-cream);}
.prose ul li{list-style:none;position:relative;padding-left:18px;}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:1px;background:var(--c-lime);}
.prose ol{list-style:decimal;}
.prose a{color:var(--c-lime);border-bottom:1px solid var(--c-line);}
.prose a:hover{border-bottom-color:var(--c-lime);}

/* ---------- rail layout ---------- */
.rail-layout{display:block;}
.rail{margin-bottom:clamp(24px,4vw,40px);}
.rail-sticky{position:static;}
.axis-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin;}
.axis-item{flex:none;}
.axis-link{
  display:block;position:relative;
  padding:8px 12px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--c-slate);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.axis-link:hover{color:var(--c-white);border-color:var(--c-slate);}
.axis-link.is-active{color:var(--c-ink);background:var(--c-lime);border-color:var(--c-lime);}
@media (min-width:981px){
  .rail-layout{
    display:grid;
    grid-template-columns:var(--rail) minmax(0,1fr);
    gap:clamp(24px,3vw,56px);
    align-items:start;
  }
  .rail{margin-bottom:0;}
  .rail-sticky{position:sticky;top:calc(var(--hdr-h-condensed) + 20px);}
  .axis-list{flex-direction:column;gap:0;overflow:visible;padding-bottom:0;}
  .axis-link{
    border:0;border-left:1px solid var(--c-line);
    border-radius:0;padding:9px 0 9px 18px;
    background:none;
  }
  .axis-link::before{
    content:"";position:absolute;left:-3px;top:50%;
    width:5px;height:5px;border-radius:50%;
    background:var(--c-line);transform:translateY(-50%);
    transition:background-color .18s var(--ease);
  }
  .axis-link:hover{border-left-color:var(--c-slate);background:none;}
  .axis-link.is-active{
    color:var(--c-lime);background:none;border-left-color:var(--c-lime);
  }
  .axis-link.is-active::before{background:var(--c-lime);}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;
  font-size:14px;font-weight:600;letter-spacing:.04em;
  color:var(--c-white);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.btn:hover{border-color:var(--c-lime);color:var(--c-lime);}
.btn-lime{background:var(--c-lime);border-color:var(--c-lime);color:var(--c-ink);}
.btn-lime:hover{background:var(--c-white);border-color:var(--c-white);color:var(--c-ink);}
.btn-amber{border-color:rgba(227,169,59,.55);color:var(--c-amber);}
.btn-amber:hover{background:var(--c-amber);border-color:var(--c-amber);color:var(--c-ink);}
.btn-ghost{color:var(--c-cream);}
.btn-sm{padding:8px 14px;font-size:12.5px;letter-spacing:.06em;}

/* ---------- tags / chips ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--c-slate);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  white-space:nowrap;
}
.tag-lime{color:var(--c-lime);border-color:rgba(201,242,77,.5);}
.tag-amber{color:var(--c-amber);border-color:rgba(227,169,59,.5);}
.tag-cinnabar{color:var(--c-cinnabar);border-color:rgba(226,75,60,.55);}

/* ---------- cards ---------- */
.card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:clamp(18px,2vw,28px);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background-color .2s var(--ease);
}
.card:hover{border-color:var(--c-lime);background:var(--c-turf);transform:translateY(-4px);}
.card-grid{
  display:grid;gap:clamp(14px,1.6vw,22px);
  grid-template-columns:repeat(auto-fit,minmax(255px,1fr));
}
.card-span-2{grid-column:span 1;}
@media (min-width:861px){
  .card-span-2{grid-column:span 2;}
}

/* ---------- data display ---------- */
.data-figure{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(44px,7vw,120px);
  line-height:.86;
  letter-spacing:-.045em;
  color:var(--c-white);
  margin-left:-.06em;
}
.data-figure.is-lime{color:var(--c-lime);}
.data-figure.is-amber{color:var(--c-amber);}
.data-figure.is-cinnabar{color:var(--c-cinnabar);}
.data-unit{
  font-family:var(--font-body);
  font-size:.28em;font-weight:600;letter-spacing:.08em;
  color:var(--c-slate);margin-left:.5em;vertical-align:.35em;
}
.stat{border-top:1px solid var(--c-line);padding-top:14px;}
.stat-label{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--c-slate);}
.stat-value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3vw,40px);
  line-height:1.12;color:var(--c-lime);
}

/* ---------- data table ---------- */
.data-table{font-size:14px;}
.data-table th,.data-table td{
  padding:10px 12px;
  border-bottom:1px solid var(--c-line);
  text-align:left;vertical-align:top;
}
.data-table thead th{
  font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--c-slate);white-space:nowrap;
}
.data-table tbody tr{transition:background-color .16s var(--ease);}
.data-table tbody tr:hover{background:var(--c-turf);}
.data-table .num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--c-lime);text-align:right;white-space:nowrap;
}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:var(--c-deep);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
}
.media-frame img,.media-frame video{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.72) contrast(1.08) brightness(.8);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,14,12,0) 38%,rgba(10,14,12,.74) 100%);
}
.media-wide{aspect-ratio:21/9;}
.media-tall{aspect-ratio:3/4;}
.media-square{aspect-ratio:1/1;}
.media-caption{
  margin-top:10px;
  font-size:12.5px;letter-spacing:.05em;color:var(--c-slate);
}

/* ---------- filter bar ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:14px 0;
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  margin-bottom:clamp(20px,2.6vw,36px);
}
.filter-btn{
  padding:8px 14px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--c-slate);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.filter-btn:hover{color:var(--c-white);border-color:var(--c-slate);}
.filter-btn[aria-pressed="true"]{background:var(--c-lime);border-color:var(--c-lime);color:var(--c-ink);}
.filter-count{
  margin-left:auto;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--c-slate);
}
[data-filter-item].is-hidden{display:none;}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--c-slate);
}
.breadcrumbs li{display:flex;align-items:center;}
.breadcrumbs li + li::before{content:"/";margin:0 8px;color:var(--c-line);}
.breadcrumbs a:hover{color:var(--c-lime);}

/* ---------- note ---------- */
.note{
  border-left:2px solid var(--c-amber);
  padding:10px 0 10px 16px;
  font-size:14px;color:var(--c-slate);
}
.note.is-cinnabar{border-left-color:var(--c-cinnabar);}

/* ---------- reveal ---------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none;}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:10px;top:-72px;z-index:120;
  padding:10px 16px;
  background:var(--c-lime);color:var(--c-ink);
  font-size:14px;font-weight:600;letter-spacing:.04em;
  border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:10px;}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;left:0;right:0;top:0;height:2px;z-index:90;
  background:transparent;pointer-events:none;
}
.scroll-progress i{
  display:block;height:100%;width:0;
  background:var(--c-lime);
  transition:width .12s linear;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,12,.94);
  border-bottom:1px solid var(--c-line);
  transition:background-color .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-condensed{
  background:rgba(10,14,12,.985);
  border-bottom-color:var(--c-lime);
}
.hdr-inner{
  width:min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline:auto;
  min-height:var(--hdr-h);
  display:flex;align-items:center;
  gap:clamp(12px,2vw,32px);
  transition:min-height .25s var(--ease);
}
.site-header.is-condensed .hdr-inner{min-height:var(--hdr-h-condensed);}
.hdr-left{display:flex;align-items:center;gap:14px;min-width:0;flex:none;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  display:block;width:9px;height:26px;flex:none;
  background:var(--c-lime);
  transform:skewX(-14deg);
  transition:height .25s var(--ease);
}
.site-header.is-condensed .brand-mark{height:18px;}
.brand-text{display:flex;align-items:baseline;gap:8px;}
.brand-name{
  font-family:var(--font-head);font-weight:800;
  font-size:19px;letter-spacing:-.02em;color:var(--c-white);
  transition:color .18s var(--ease);
}
.brand-sub{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--c-slate);}
.brand:hover .brand-name{color:var(--c-lime);}
.season-chip{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.05em;
  color:var(--c-amber);
  border:1px solid rgba(227,169,59,.45);
  border-radius:var(--radius);
  padding:2px 8px;white-space:nowrap;
}
.hdr-nav{
  position:absolute;left:0;right:0;top:100%;
  display:none;
  background:var(--c-deep);
  border-bottom:1px solid var(--c-line);
  padding:6px var(--gutter) 18px;
  max-height:calc(100vh - var(--hdr-h));
  overflow-y:auto;
}
.hdr-nav[data-open]{display:block;}
.nav-list{display:flex;flex-direction:column;}
.nav-item{border-bottom:1px solid var(--c-line);}
.nav-item:last-child{border-bottom:0;}
.nav-link{
  display:block;position:relative;
  padding:14px 2px;
  font-size:16px;font-weight:600;letter-spacing:.06em;
  color:var(--c-cream);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;
  background:var(--c-lime);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
  display:none;
}
.nav-link:hover{color:var(--c-white);}
.nav-link[aria-current="page"]{color:var(--c-lime);}
.hdr-tools{display:flex;align-items:center;gap:10px;margin-left:auto;flex:none;}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 10px;
  font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--c-cream);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  background:transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-lime);color:var(--c-lime);}
.nav-toggle-label{white-space:nowrap;}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.nav-toggle-bars i{display:block;height:1px;width:100%;background:currentColor;transition:transform .2s var(--ease);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(2.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-2.5px) rotate(-45deg);}
@media (max-width:719px){
  .season-chip{display:none;}
}
@media (max-width:479px){
  .hdr-tools .btn{display:none;}
}
@media (min-width:981px){
  .hdr-nav{
    position:static;display:block;
    margin-left:auto;
    background:none;border:0;padding:0;
    max-height:none;overflow:visible;
  }
  .hdr-tools{margin-left:0;}
  .nav-list{flex-direction:row;align-items:center;gap:clamp(14px,1.6vw,28px);}
  .nav-item{border-bottom:0;}
  .nav-link{padding:8px 2px;font-size:14px;}
  .nav-link::after{display:block;}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link[aria-current="page"]::after{transform:scaleX(1);}
  .nav-toggle{display:none;}
  .site-header.is-condensed .nav-toggle{display:inline-flex;}
  .site-header.is-condensed .hdr-nav{
    display:none;
    position:absolute;top:100%;right:var(--gutter);left:auto;
    width:min(300px,92vw);
    background:var(--c-deep);
    border:1px solid var(--c-line);
    border-radius:var(--radius);
    padding:10px 0;
    max-height:none;
  }
  .site-header.is-condensed .hdr-nav[data-open]{display:block;}
  .site-header.is-condensed .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .site-header.is-condensed .nav-item{border-bottom:1px solid var(--c-line);}
  .site-header.is-condensed .nav-item:last-child{border-bottom:0;}
  .site-header.is-condensed .nav-link{padding:12px 18px;font-size:14px;}
  .site-header.is-condensed .nav-link::after{display:none;}
}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(64px,10vw,140px);
  background:var(--c-deep);
  border-top:1px solid var(--c-line);
  padding-block:clamp(40px,6vw,80px) 24px;
}
.ftr-grid{display:grid;gap:clamp(26px,3vw,48px);grid-template-columns:1fr;}
.ftr-col{min-width:0;}
.ftr-brand{
  font-family:var(--font-head);font-weight:800;
  font-size:22px;letter-spacing:-.02em;color:var(--c-white);
}
.ftr-brand span{
  margin-left:8px;vertical-align:2px;
  font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--c-lime);
}
.ftr-desc{margin-top:14px;font-size:15px;color:var(--c-cream);max-width:36ch;}
.ftr-meta{margin-top:10px;font-size:12.5px;letter-spacing:.06em;color:var(--c-slate);}
.ftr-icp{
  margin-top:6px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;
  color:var(--c-amber);
}
.ftr-title{
  margin-bottom:14px;
  font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--c-slate);text-transform:uppercase;
}
.ftr-list{display:grid;gap:8px;}
.ftr-list a{
  font-size:15px;color:var(--c-cream);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.ftr-list a:hover{color:var(--c-lime);border-bottom-color:var(--c-line);}
.ftr-contact{
  margin-top:10px;
  font-family:var(--font-mono);font-size:14px;
  color:var(--c-cream);word-break:break-word;
}
.ftr-bottom{
  margin-top:clamp(32px,4vw,56px);
  padding-top:18px;
  border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
}
.ftr-copy{font-size:12.5px;letter-spacing:.06em;color:var(--c-slate);}
.ftr-legal{display:flex;flex-wrap:wrap;gap:20px;}
.ftr-legal a{font-size:12.5px;letter-spacing:.06em;color:var(--c-slate);}
.ftr-legal a:hover{color:var(--c-lime);}
@media (min-width:640px){
  .ftr-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:981px){
  .ftr-grid{grid-template-columns:1.5fr 1fr 1fr 1.25fr;}
}

/* ---------- back to top ---------- */
.back-top{
  position:fixed;right:var(--gutter);bottom:var(--gutter);z-index:80;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;
  background:var(--c-deep);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--c-cream);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),color .18s var(--ease),border-color .18s var(--ease),visibility .2s;
}
.back-top.is-on{opacity:1;visibility:visible;transform:none;}
.back-top:hover{border-color:var(--c-lime);color:var(--c-lime);}

/* ---------- reduced motion ---------- */
@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 !important;transform:none !important;}
  .card:hover{transform:none;}
  .scroll-progress i{transition:none;}
}