/* =========================================================
   博奥体育主站 · 共享外壳样式表 /assets/site.css
   结构：令牌 → 重置 → 排版 → 布局 → 头部 → 页脚 → 组件 → 响应式
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0B1512;
  --ink-2:#12241C;
  --card:#1B3428;
  --text:#ECF3EE;
  --muted:#9DB3A7;
  --lime:#C8FF4D;
  --orange:#FF6A2B;
  --steel:#5B7E96;
  --steel-deep:#2C4A5C;
  --line:#41514A;

  --radius:4px;
  --shadow:0 1px 0 rgba(236,243,238,.06);

  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:40px;
  --sp-5:64px;
  --sp-6:96px;

  --maxw:1280px;
  --gutter:64px;

  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --page-progress:0;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,dl,dd,blockquote{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:2px}

/* ---------- 3. 排版 ---------- */
body{
  min-height:100vh;
  padding:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(115% 52% at 84% -8%, rgba(44,74,92,.34), transparent 62%),
    radial-gradient(70% 38% at -6% 0%, rgba(200,255,77,.05), transparent 70%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-weight:800;letter-spacing:-.01em;line-height:1.14}

.display{
  font-size:clamp(40px,6vw,88px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.02;
}
.h2{font-size:clamp(28px,3.4vw,40px)}
.h3{font-size:20px;line-height:1.3}

.lede{
  font-size:clamp(17px,1.5vw,20px);
  line-height:1.7;
  color:#D6E2DA;
  max-width:62ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--muted);
}
.eyebrow::before{
  content:"";
  width:16px;
  height:1px;
  background:var(--lime);
}
.mono,.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.muted{color:var(--muted)}
.accent{color:var(--lime)}
.accent--orange{color:var(--orange)}

.link{
  position:relative;
  color:var(--text);
  font-weight:600;
}
.link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-3px;
  width:100%;
  height:1px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .12s ease-out;
}
.link:hover::after,
.link:focus-visible::after{transform:scaleX(1)}

/* ---------- 4. 布局 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.section{padding:var(--sp-6) 0}
.section--tight{padding:var(--sp-5) 0}
.section--alt{background:var(--ink-2)}

.grid{display:grid;gap:var(--sp-3)}
.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))}

.stack>*+*{margin-top:var(--sp-3)}
.stack--lg>*+*{margin-top:var(--sp-4)}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- 5. 面包屑 ---------- */
.crumbs{margin:0 0 var(--sp-4)}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__item+.crumbs__item::before{content:"/";color:var(--line)}
.crumbs__link{color:var(--muted);transition:color .12s ease-out}
.crumbs__link:hover{color:var(--lime)}
.crumbs__current{color:var(--text)}

/* ---------- 6. 头部：命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
}
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:120;
  padding:10px 16px;
  background:var(--lime);
  color:#08110D;
  font-weight:700;
  font-size:14px;
  border-radius:var(--radius);
  transition:top .12s ease-out;
}
.skip-link:focus{top:12px}

.axis-rail{
  position:fixed;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:rgba(65,81,74,.45);
  z-index:70;
  pointer-events:none;
}
.axis-rail__fill{
  display:block;
  width:100%;
  height:calc(var(--page-progress,0) * 100%);
  background:var(--lime);
}

.cmdbar{
  position:relative;
  background:rgba(11,21,18,.88);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(12px) saturate(120%);
}
.cmdbar__inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
  min-height:72px;
  display:flex;
  align-items:center;
  gap:var(--sp-3);
  transition:min-height .18s ease-out;
}
.site-header[data-compact] .cmdbar__inner{min-height:52px}
.site-header[data-compact] .brand__sub{display:none}
.site-header[data-compact] .datastat__label{display:none}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:6px 0;
}
.brand__mark{
  width:30px;
  height:30px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  border:1px solid var(--lime);
  border-radius:2px;
  color:var(--lime);
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:0;
}
.brand__text{display:block}
.brand__name{
  display:block;
  font-size:16px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
}
.brand__sub{
  display:block;
  font-family:var(--mono);
  font-size:11px;
  line-height:1.4;
  letter-spacing:.08em;
  color:var(--muted);
}

.site-nav{
  position:static;
  flex:1 1 auto;
  min-width:0;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  flex-wrap:wrap;
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:8px 12px 8px 14px;
  border-radius:2px;
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  line-height:1.2;
  transition:color .12s ease-out,background-color .12s ease-out;
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:2px;
  top:50%;
  transform:translateY(-50%);
  width:2px;
  height:0;
  background:var(--lime);
  transition:height .12s ease-out;
}
.site-nav__link:hover{color:var(--text);background:rgba(27,52,40,.7)}
.site-nav__link:hover::before{height:62%}
.site-nav__link[aria-current="page"]{
  color:var(--text);
  background:rgba(27,52,40,.92);
}
.site-nav__link[aria-current="page"]::before{height:100%}
.site-nav__idx{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:0;
  color:var(--steel);
}
.site-nav__link[aria-current="page"] .site-nav__idx,
.site-nav__link:hover .site-nav__idx{color:var(--lime)}
.site-nav__label{white-space:nowrap}

.cmdbar__tools{
  display:flex;
  align-items:center;
  gap:var(--sp-2);
  margin-left:auto;
}
.datastat{
  display:flex;
  align-items:center;
  gap:8px;
  padding-left:var(--sp-2);
  border-left:1px solid var(--line);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
  white-space:nowrap;
}
.datastat__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(200,255,77,.16);
}
.datastat__value{color:var(--text)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text);
  cursor:pointer;
  transition:border-color .12s ease-out,color .12s ease-out;
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1.5px;
  background:var(--lime);
  transition:transform .16s ease-out,top .16s ease-out,bottom .16s ease-out;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:4.5px;transform:rotate(-45deg)}

.cmdbar__progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
}
.cmdbar__progress-bar{
  display:block;
  height:100%;
  width:calc(var(--page-progress,0) * 100%);
  background:linear-gradient(90deg,var(--lime),var(--orange));
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:var(--sp-6);
  background:var(--ink-2);
  border-top:1px solid var(--line);
}
.footer__grid{
  max-width:var(--maxw);
  margin:0 auto;
  padding:var(--sp-5) var(--gutter) var(--sp-4);
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:var(--sp-4);
}
.footer__col{min-width:0}
.footer__brand{
  font-size:18px;
  font-weight:800;
  letter-spacing:-.01em;
}
.footer__lead{
  margin-top:var(--sp-2);
  max-width:34ch;
  font-size:14px;
  color:var(--muted);
}
.footer__title{
  margin-bottom:var(--sp-2);
  font-family:var(--mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--steel);
}
.footer__list{display:grid;gap:10px}
.footer__list--plain{gap:12px}
.footer__link{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  transition:color .12s ease-out;
}
.footer__link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:1px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .12s ease-out;
}
.footer__link:hover,.footer__link:focus-visible{color:var(--text)}
.footer__link:hover::after,.footer__link:focus-visible::after{transform:scaleX(1)}
.footer__meta{
  font-family:var(--mono);
  font-size:12px;
  line-height:1.9;
  color:var(--muted);
  word-break:break-word;
}
.footer__meta-key{
  display:inline-block;
  min-width:3.2em;
  margin-right:6px;
  color:var(--steel);
}
.footer__bottom{
  max-width:var(--maxw);
  margin:0 auto;
  padding:var(--sp-2) var(--gutter) var(--sp-4);
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-2);
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--muted);
}
.footer__legal-links{display:flex;align-items:center;gap:10px}
.footer__sep{color:var(--line)}

/* ---------- 8. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:transparent;
  color:var(--text);
  font-size:14px;
  font-weight:700;
  letter-spacing:.01em;
  cursor:pointer;
  transition:background-color .12s ease-out,color .12s ease-out,border-color .12s ease-out,transform .12s ease-out;
}
.btn:hover{border-color:var(--lime);color:var(--lime)}
.btn:active{transform:translateY(1px)}
.btn--lime{
  background:var(--lime);
  border-color:var(--lime);
  color:#0B1512;
}
.btn--lime:hover{
  background:#D9FF7C;
  border-color:#D9FF7C;
  color:#0B1512;
}
.btn--ghost{background:transparent}
.btn--sm{padding:8px 14px;font-size:13px}
.btn--wide{width:100%}
.btn[disabled],.btn.is-disabled{
  opacity:.42;
  cursor:not-allowed;
  background:transparent;
  border-color:var(--line);
  color:var(--muted);
}

.panel{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.panel--flush{border-radius:0}
.panel--soft{background:var(--ink-2)}
.panel__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-2);
  padding:14px 22px;
  border-bottom:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.panel__body{padding:22px}
.panel__body--tight{padding:14px}

.metric{display:flex;flex-direction:column;gap:6px}
.metric__value{
  font-family:var(--mono);
  font-size:clamp(24px,3vw,32px);
  font-weight:600;
  line-height:1.05;
  letter-spacing:-.01em;
  color:var(--lime);
}
.metric__value--orange{color:var(--orange)}
.metric__label{font-size:13px;color:var(--muted)}
.metric__delta{
  font-family:var(--mono);
  font-size:12px;
  color:var(--steel);
}

.data-table{
  width:100%;
  font-size:14px;
}
.data-table caption{
  padding-bottom:12px;
  text-align:left;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}
.data-table th,
.data-table td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.data-table thead th{
  background:var(--steel-deep);
  color:var(--text);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.04em;
}
.data-table tbody tr{transition:background-color .12s ease-out}
.data-table tbody tr:hover{background:rgba(44,74,92,.28)}
.data-table .num{text-align:right}

.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:var(--muted);
  cursor:pointer;
  transition:background-color .12s ease-out,color .12s ease-out,border-color .12s ease-out;
}
.chip:hover{color:var(--text);border-color:var(--muted)}
.chip--lime{border-color:rgba(200,255,77,.5);color:var(--lime)}
.chip--orange{border-color:rgba(255,106,43,.5);color:var(--orange)}
.chip[aria-pressed="true"],
.chip.is-active{
  background:var(--lime);
  border-color:var(--lime);
  color:#0B1512;
}

.fold{border-top:1px solid var(--line)}
.fold:last-child{border-bottom:1px solid var(--line)}
.fold__summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-2);
  padding:20px 0;
  font-size:17px;
  font-weight:700;
  cursor:pointer;
  list-style:none;
  transition:color .12s ease-out;
}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary:hover{color:var(--lime)}
.fold__summary::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--mono);
  font-size:18px;
  color:var(--lime);
}
.fold[open] .fold__summary::after{content:"–"}
.fold__body{
  max-width:72ch;
  padding:0 0 var(--sp-3);
  color:var(--muted);
  font-size:15px;
}
@media (prefers-reduced-motion:no-preference){
  .fold[open] .fold__body{animation:foldIn .24s ease-out}
}
@keyframes foldIn{
  from{opacity:0;transform:translateY(-4px)}
  to{opacity:1;transform:none}
}

.figure{display:block;margin:0}
.figure__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background-color:var(--steel-deep);
  background-image:
    linear-gradient(135deg,rgba(44,74,92,.72),rgba(11,21,18,.88)),
    repeating-linear-gradient(90deg,rgba(65,81,74,.32) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(0deg,rgba(65,81,74,.22) 0 1px,transparent 1px 48px);
}
.figure__frame>img,
.figure__frame>svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure__cap{
  margin-top:12px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
}
.figure--wide .figure__frame{aspect-ratio:21/9}
.figure--square .figure__frame{aspect-ratio:1/1}
.figure--tall .figure__frame{aspect-ratio:3/4}

/* 滚动显现（仅在 JS 可用时启用，避免内容不可见） */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease-out,transform .32s ease-out;
}
html.js [data-reveal][data-revealed]{
  opacity:1;
  transform:none;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1180px){
  .wrap,
  .cmdbar__inner,
  .footer__grid,
  .footer__bottom{padding-left:40px;padding-right:40px}
  .site-nav__idx{display:none}
  .datastat{display:none}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-3)}
}

@media (max-width:960px){
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    max-height:calc(100vh - 64px);
    overflow-y:auto;
    background:var(--ink-2);
    border-bottom:1px solid var(--line);
    padding:8px 24px 24px;
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{display:block;flex-wrap:nowrap}
  .site-nav__item+.site-nav__item{border-top:1px solid rgba(65,81,74,.55)}
  .site-nav__link{
    display:flex;
    width:100%;
    padding:14px 12px 14px 16px;
    border-radius:0;
    font-size:16px;
    color:var(--text);
  }
  .site-nav__link::before{
    top:10px;
    bottom:10px;
    height:auto;
    transform:none;
    opacity:0;
    transition:opacity .12s ease-out;
  }
  .site-nav__link:hover::before,
  .site-nav__link[aria-current="page"]::before{
    height:auto;
    opacity:1;
  }
  .site-nav__idx{display:inline}
  .nav-toggle{display:inline-flex}
  .cmdbar__inner{min-height:60px;gap:12px}
  .wrap,
  .cmdbar__inner,
  .footer__grid,
  .footer__bottom{padding-left:24px;padding-right:24px}
  .section{padding:64px 0}
  .section--tight{padding:40px 0}
  .axis-rail{width:2px}
  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:600px){
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__lead{max-width:none}
  .brand__sub{display:none}
  .cmdbar__tools .btn--sm{padding:7px 10px;font-size:12px}
  .footer__bottom{font-size:11.5px}
}

/* ---------- 10. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
}