/* ============================================================
   BSPORT体育站 / shared site kit
   /assets/site.css
   1 reset · 2 tokens · 3 base type · 4 utilities · 5 layout
   6 components · 7 reveal · 8 header · 9 footer · 10 motion
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--bsp-header-h) + 16px)}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,address{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
address{font-style:normal}
[hidden]{display:none !important}

/* ---------- 2. tokens ---------- */
:root{
  --ink-900:#05130F;
  --ink-800:#0B1F1A;
  --ink-700:#1B302A;
  --cyan-500:#2BF5C8;
  --cyan-300:#8CF2DC;
  --orange-400:#FF7A2F;
  --paper:#F3F6F0;
  --text:#E6F2EC;
  --muted:#93A9A0;
  --grid:#28403A;

  --font-sans:"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","Cascadia Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --edge:clamp(20px,5vw,56px);
  --radius:2px;
  --bsp-header-h:64px;
}
@media (min-width:1024px){:root{--bsp-header-h:84px}}

/* ---------- 3. base type ---------- */
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(90% 60% at 88% -12%,rgba(43,245,200,.10),transparent 60%),
    radial-gradient(80% 52% at 2% 106%,rgba(27,48,42,.9),transparent 66%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
main{display:block}
h1,h2,h3,h4{font-weight:800;line-height:1.08;letter-spacing:-.02em;font-stretch:87%;color:var(--paper)}
h1{font-size:clamp(2.5rem,6.4vw,5.5rem)}
h2{font-size:clamp(1.75rem,3.6vw,3.5rem)}
h3{font-size:clamp(1.25rem,2vw,2rem);line-height:1.2}
h4{font-size:1.125rem;line-height:1.35;letter-spacing:0}
p{max-width:none}
strong{color:var(--paper);font-weight:700}
::selection{background:var(--cyan-500);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--cyan-500);outline-offset:3px;border-radius:1px}

/* ---------- 4. utilities ---------- */
.bsp-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.bsp-label{display:block;font-size:.6875rem;line-height:1.4;letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--muted)}
.bsp-mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.bsp-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:500;letter-spacing:.02em;color:var(--cyan-500)}
.bsp-lead{font-size:clamp(1rem,1.5vw,1.125rem);line-height:1.8;max-width:38ch;color:var(--text)}
.bsp-note{font-size:.8125rem;line-height:1.7;color:var(--muted)}
.bsp-rule{height:1px;border:0;background:var(--grid);margin:0}
.bsp-divider{height:1px;border:0;background:linear-gradient(90deg,var(--grid),transparent);margin-block:clamp(28px,4vw,56px)}
.bsp-cut{clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 36px))}

/* ---------- 5. layout ---------- */
.bsp-shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--edge)}
.bsp-section{position:relative;padding-block:clamp(40px,7vw,104px)}
.bsp-section__head{display:grid;gap:16px;max-width:52ch}
.bsp-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.4vw,28px)}
.bsp-grid > *{grid-column:1 / -1}
@media (min-width:768px){
  .bsp-span-4{grid-column:span 4}
  .bsp-span-5{grid-column:span 5}
  .bsp-span-6{grid-column:span 6}
  .bsp-span-7{grid-column:span 7}
  .bsp-span-8{grid-column:span 8}
  .bsp-span-12{grid-column:span 12}
}
.bsp-prose{display:grid;gap:18px;max-width:66ch}
.bsp-prose h2{font-size:clamp(1.375rem,2.4vw,2rem);margin-block-start:12px}
.bsp-prose h3{font-size:1.125rem;letter-spacing:0}
.bsp-prose p{line-height:1.85;color:var(--text)}
.bsp-prose ul{display:grid;gap:10px;padding-inline-start:20px;list-style:disc;color:var(--text)}
.bsp-prose li::marker{color:var(--cyan-500)}
.bsp-prose a{color:var(--cyan-300);text-decoration:underline;text-underline-offset:3px}

/* ---------- 6. components ---------- */
.bsp-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.15em;border:1px solid transparent;border-radius:var(--radius);
  font-size:.875rem;font-weight:700;line-height:1;letter-spacing:.03em;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.bsp-btn:active{transform:translateY(1px)}
.bsp-btn--sub{background:var(--orange-400);color:#180B03;box-shadow:0 0 0 1px rgba(255,122,47,.35),0 12px 26px -16px rgba(255,122,47,.9)}
.bsp-btn--sub:hover{background:#FF9055}
.bsp-btn--ghost{border-color:rgba(43,245,200,.5);color:var(--cyan-300);background:transparent}
.bsp-btn--ghost:hover{background:rgba(43,245,200,.1);color:var(--cyan-500);border-color:var(--cyan-500)}
.bsp-btn--paper{background:var(--paper);color:var(--ink-900)}
.bsp-btn--paper:hover{background:#fff}

.bsp-tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.32em .62em;border:1px solid var(--grid);border-radius:var(--radius);
  font-size:.6875rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan-300);background:rgba(43,245,200,.07);
}
.bsp-tag--sub{color:#FFD2B6;border-color:rgba(255,122,47,.45);background:rgba(255,122,47,.14)}
.bsp-tag--paper{color:var(--ink-800);background:var(--paper);border-color:#C3D2C9}

.bsp-status{display:inline-flex;align-items:center;gap:.55em;font-size:.8125rem;letter-spacing:.04em;color:var(--text)}
.bsp-status::before{content:"";flex:0 0 auto;width:.55em;height:.55em;border-radius:50%;background:var(--orange-400);box-shadow:0 0 0 3px rgba(255,122,47,.18)}

.bsp-panel{
  position:relative;background:var(--ink-800);
  border:1px solid var(--grid);border-radius:var(--radius);
  padding:clamp(18px,3vw,30px);
  box-shadow:inset 0 1px 0 rgba(243,246,240,.04),0 30px 60px -46px #000;
}
.bsp-panel--slab{background:var(--ink-700)}
.bsp-panel--paper{background:var(--paper);color:var(--ink-900);border-color:#C3D2C9;box-shadow:inset 0 1px 0 #fff,0 30px 60px -46px #000}
.bsp-panel--paper h2,.bsp-panel--paper h3,.bsp-panel--paper h4{color:var(--ink-900)}
.bsp-panel--paper .bsp-label{color:#4B6459}
.bsp-panel--paper .bsp-note{color:#5A7368}

.bsp-figure{display:grid;gap:12px;margin:0}
.bsp-figure__media{
  position:relative;overflow:hidden;aspect-ratio:16 / 9;
  border:1px solid var(--grid);border-radius:var(--radius);
  background:
    radial-gradient(120% 100% at 18% 0%,rgba(43,245,200,.14),transparent 62%),
    linear-gradient(158deg,var(--ink-700),var(--ink-900) 72%);
}
.bsp-figure__media::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(43,245,200,.07) 0 1px,transparent 1px 5px);
  mix-blend-mode:screen;opacity:.55;
}
.bsp-figure__media::after{
  content:"";position:absolute;inset:auto 0 0 0;height:42%;pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(5,19,15,.85));
}
.bsp-figure__media img{width:100%;height:100%;object-fit:cover}
.bsp-figure__caption{font-size:.8125rem;line-height:1.6;letter-spacing:.02em;color:var(--muted)}
.bsp-figure--wide .bsp-figure__media{aspect-ratio:21 / 9}
.bsp-figure--square .bsp-figure__media{aspect-ratio:1 / 1}
.bsp-figure--tall .bsp-figure__media{aspect-ratio:4 / 5}

.bsp-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.5em;margin-block-end:clamp(18px,3vw,32px);font-size:.8125rem;letter-spacing:.04em;color:var(--muted)}
.bsp-crumbs a{color:var(--text);padding-block:2px;border-bottom:1px solid transparent;transition:color .18s,border-color .18s}
.bsp-crumbs a:hover{color:var(--cyan-500);border-color:rgba(43,245,200,.6)}
.bsp-crumbs__sep{color:var(--grid)}
.bsp-crumbs [aria-current="page"]{color:var(--cyan-500)}

.bsp-back{
  display:inline-flex;align-items:center;gap:.5em;
  padding:.55em .95em;border:1px solid rgba(43,245,200,.45);border-radius:var(--radius);
  font-size:.8125rem;font-weight:600;letter-spacing:.08em;color:var(--cyan-300);
  transition:background-color .18s,color .18s,border-color .18s;
}
.bsp-back:hover{background:rgba(43,245,200,.1);color:var(--cyan-500);border-color:var(--cyan-500)}

.bsp-tabs{display:grid;gap:clamp(16px,2.4vw,26px)}
.bsp-tabs__list{position:relative;display:flex;gap:4px;overflow-x:auto;border-bottom:1px solid var(--grid);scrollbar-width:thin}
.bsp-tabs__tab{
  flex:0 0 auto;padding:13px 15px;white-space:nowrap;
  font-size:.875rem;font-weight:600;letter-spacing:.06em;color:var(--muted);
  transition:color .18s ease;
}
.bsp-tabs__tab:hover{color:var(--cyan-300)}
.bsp-tabs__tab[aria-selected="true"]{color:var(--paper)}
.bsp-tabs__ink{
  position:absolute;left:0;bottom:-1px;width:0;height:3px;background:var(--orange-400);
  transition:transform .26s cubic-bezier(.2,.7,.3,1),width .26s cubic-bezier(.2,.7,.3,1);
}
.bsp-tabs__panels{display:grid;gap:16px}
.bsp-tabs__panel:focus-visible{outline:2px solid var(--cyan-500);outline-offset:6px}

/* ---------- 7. reveal ---------- */
[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .55s cubic-bezier(.2,.7,.3,1),transform .55s cubic-bezier(.2,.7,.3,1);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 8. header ---------- */
.bsp-skip{
  position:fixed;top:-90px;left:14px;z-index:200;
  padding:12px 18px;border-radius:var(--radius);
  background:var(--cyan-500);color:var(--ink-900);
  font-size:.875rem;font-weight:700;letter-spacing:.04em;
  transition:top .18s ease;
}
.bsp-skip:focus,.bsp-skip:focus-visible{top:14px}

.bsp-header{
  position:sticky;top:0;z-index:90;
  background:var(--ink-900);color:var(--text);
  border-bottom:1px solid var(--grid);
}
.bsp-header__inner{
  display:flex;align-items:center;gap:clamp(10px,2vw,28px);
  min-height:var(--bsp-header-h);padding-block:10px;
}

.bsp-brand{display:inline-grid;gap:3px;line-height:1;flex:0 0 auto}
.bsp-brand__row{display:inline-flex;align-items:center;gap:8px}
.bsp-brand__mark{font-size:clamp(1.1rem,2vw,1.4rem);font-weight:800;letter-spacing:-.02em;font-stretch:87%;color:var(--paper);transition:color .18s}
.bsp-brand__ver{
  font-family:var(--font-mono);font-size:.6rem;letter-spacing:.08em;
  padding:2px 5px;border:1px solid rgba(43,245,200,.45);border-radius:1px;color:var(--cyan-500);
}
.bsp-brand__sub{font-size:.625rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
.bsp-brand:hover .bsp-brand__mark{color:var(--cyan-500)}

.bsp-header__tag{display:none;margin-inline-start:auto;font-size:.75rem;letter-spacing:.16em;color:var(--muted)}
@media (min-width:1180px){.bsp-header__tag{display:block}}

.bsp-navtoggle{
  display:inline-flex;align-items:center;gap:10px;margin-inline-start:auto;
  padding:9px 12px;border:1px solid var(--grid);border-radius:var(--radius);
  font-size:.8125rem;letter-spacing:.16em;color:var(--text);
  transition:color .2s,border-color .2s;
}
.bsp-navtoggle:hover{color:var(--cyan-300);border-color:rgba(43,245,200,.45)}
.bsp-navtoggle__bars{display:grid;gap:5px;width:18px}
.bsp-navtoggle__bars span{display:block;height:2px;background:currentColor;transition:transform .22s ease,opacity .22s ease}
.bsp-header[data-open] .bsp-navtoggle{color:var(--cyan-500);border-color:rgba(43,245,200,.5)}
.bsp-header[data-open] .bsp-navtoggle__bars span:first-child{transform:translateY(3.5px) rotate(45deg)}
.bsp-header[data-open] .bsp-navtoggle__bars span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

.bsp-nav{display:none}

.bsp-progress{height:3px;background:rgba(40,64,58,.5);overflow:hidden}
.bsp-progress__bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--cyan-500),var(--orange-400));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}

/* desktop navigation */
@media (min-width:1024px){
  .bsp-nav{display:block;margin-inline-start:auto}
  .bsp-nav__list{display:flex;align-items:center;gap:clamp(12px,1.8vw,26px)}
  .bsp-nav__item{display:block}
  .bsp-nav__link{
    position:relative;display:inline-block;padding-block:10px;
    font-size:.9375rem;letter-spacing:.01em;color:var(--text);white-space:nowrap;
    transition:color .18s ease;
  }
  .bsp-nav__link::after{
    content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--cyan-500);
    transform:scaleX(0);transform-origin:0 50%;transition:transform .24s ease;
  }
  .bsp-nav__link:hover{color:var(--cyan-300)}
  .bsp-nav__link:hover::after{transform:scaleX(1)}
  .bsp-nav__link[aria-current="page"]{color:var(--cyan-500);font-weight:700}
  .bsp-nav__link[aria-current="page"]::after{transform:scaleX(1)}
  .bsp-nav__cta{margin-inline-start:6px;display:block}
  .bsp-navtoggle{display:none}
}

/* mobile / tablet navigation panel */
@media (max-width:1023px){
  .bsp-nav{
    position:fixed;left:0;right:0;top:calc(var(--bsp-header-h) + 3px);bottom:0;z-index:85;
    display:none;overflow-y:auto;
    padding:28px var(--edge) 48px;
    background:var(--ink-800);
    border-top:1px solid var(--grid);
    clip-path:polygon(0 0,100% 0,100% 88%,0 100%);
  }
  .bsp-header[data-open] .bsp-nav{display:block}
  .bsp-nav__list{display:grid;gap:0}
  .bsp-nav__item{border-bottom:1px solid var(--grid)}
  .bsp-nav__link{display:block;padding:18px 2px;font-size:1.25rem;font-weight:700;letter-spacing:-.01em;color:var(--text)}
  .bsp-nav__link:hover{color:var(--cyan-300)}
  .bsp-nav__link[aria-current="page"]{color:var(--cyan-500)}
  .bsp-nav__link[aria-current="page"]::before{
    content:"";display:inline-block;width:14px;height:2px;margin-inline-end:10px;
    background:var(--cyan-500);vertical-align:middle;
  }
  .bsp-nav__cta{margin-block-start:26px}
  .bsp-nav__cta .bsp-btn{width:100%;min-height:52px;font-size:1rem}
}

/* ---------- 9. footer ---------- */
.bsp-footer{
  position:relative;margin-top:clamp(56px,9vw,120px);
  padding-block:clamp(40px,6vw,80px) clamp(24px,4vw,40px);
  background:var(--ink-900);color:var(--text);
  border-top:1px solid var(--grid);
}
.bsp-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan-500) 30%,var(--orange-400) 70%,transparent);
  opacity:.45;
}
.bsp-footer__mast{display:grid;gap:14px;padding-block-end:clamp(24px,4vw,44px);border-bottom:1px solid var(--grid)}
.bsp-footer__eyebrow{color:var(--cyan-300)}
.bsp-footer__word{
  display:flex;align-items:baseline;flex-wrap:wrap;gap:.26em;
  font-size:clamp(2.25rem,9vw,5.5rem);font-weight:800;line-height:.92;
  letter-spacing:-.035em;font-stretch:87%;color:var(--ink-700);
}
.bsp-footer__word-cyan{font-size:.32em;letter-spacing:.02em;color:var(--cyan-500)}
.bsp-footer__line{max-width:46ch;font-size:clamp(.9375rem,1.4vw,1.0625rem);line-height:1.75;color:var(--text)}
.bsp-footer__grid{display:grid;grid-template-columns:1fr;gap:clamp(22px,3vw,36px);padding-block:clamp(26px,4vw,44px)}
@media (min-width:640px){.bsp-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.bsp-footer__grid{grid-template-columns:1.25fr 1fr 1fr 1.1fr}}
.bsp-footer__col{
  display:grid;gap:12px;align-content:start;
  padding-block-start:16px;border-top:1px solid var(--grid);
}
.bsp-footer__label{
  font-size:.6875rem;font-weight:600;line-height:1.4;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan-300);
}
.bsp-footer__meta{max-width:36ch;font-size:.875rem;line-height:1.75;color:var(--muted)}
.bsp-footer__address{display:grid;gap:4px;max-width:none}
.bsp-footer__links{display:grid;gap:8px}
.bsp-footer__links a{
  position:relative;display:inline-block;padding-inline-start:14px;
  font-size:.9375rem;color:var(--text);
  transition:color .18s ease,transform .18s ease;
}
.bsp-footer__links a::before{
  content:"";position:absolute;left:0;top:.8em;width:6px;height:1px;
  background:var(--grid);transition:background-color .18s,width .18s;
}
.bsp-footer__links a:hover{color:var(--cyan-500);transform:translateX(2px)}
.bsp-footer__links a:hover::before{background:var(--cyan-500);width:9px}
.bsp-footer__bottom{
  display:grid;gap:8px;padding-block-start:clamp(20px,3vw,32px);
  border-top:1px solid var(--grid);
}
@media (min-width:900px){
  .bsp-footer__bottom{grid-template-columns:auto auto 1fr;align-items:center;gap:24px}
}
.bsp-footer__legal{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.04em;color:var(--muted)}
.bsp-footer__legal:last-child{font-family:var(--font-sans);letter-spacing:.02em}

/* ---------- 10. motion fallback ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .bsp-progress__bar{transition:none !important}
}