/* ============================================================
   博喜体育 · 共享 Site Kit /assets/site.css
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(a,button,summary,[tabindex]):focus-visible{outline:2px solid var(--lime);outline-offset:2px}
::selection{background:var(--lime);color:var(--ink)}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0E1311;
  --panel:#12241F;
  --panel-soft:#16302A;
  --line:#2F4A3F;
  --grid-line:#3A4A44;
  --muted:#8C9490;
  --cream:#F2EFE6;
  --lime:#C6F24A;
  --lime-soft:rgba(198,242,74,.14);
  --amber:#F2A03D;
  --clay:#B9714F;
  --sand:#E8E2D4;

  --rail-w:104px;
  --rail-w-open:232px;
  --bar-h:56px;

  --gap:24px;
  --gap-s:16px;
  --gap-l:32px;
  --pad-x:clamp(16px,4vw,64px);
  --ease:cubic-bezier(.2,.7,.3,1);

  --font-display:"Arial Black","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Noto Sans Mono",monospace;
}

/* ---------- 3. Base ---------- */
body{
  background:var(--ink);
  color:var(--cream);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
}
#main-content{scroll-margin-top:calc(var(--bar-h) + 16px)}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

/* ---------- 4. Type helpers ---------- */
.title-xl{font-family:var(--font-display);font-weight:900;font-size:clamp(32px,5vw,60px);line-height:1;letter-spacing:-.02em}
.title-l{font-family:var(--font-display);font-weight:800;font-size:clamp(24px,3vw,36px);line-height:1.05;letter-spacing:-.015em}
.title-m{font-family:var(--font-display);font-weight:800;font-size:clamp(18px,2vw,22px);line-height:1.25}
.label{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--muted)
}
.label::before{content:"";width:16px;height:1px;background:var(--line)}
.data{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}
.data--lime{color:var(--lime)}
.data--amber{color:var(--amber)}
.prose{max-width:68ch;font-size:16px;line-height:1.78;color:var(--cream)}
.prose p + p{margin-top:1em}
.prose a{color:var(--lime);border-bottom:1px solid rgba(198,242,74,.4)}

/* ---------- 5. Layout helpers ---------- */
.container{width:100%;max-width:1240px;margin-inline:auto;padding-inline:var(--pad-x)}
.section{padding-block:clamp(32px,5vw,64px)}
.stack{display:flex;flex-direction:column;gap:var(--gap-s)}
.cluster{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.grid{display:grid;gap:var(--gap-s);grid-template-columns:1fr}
@media (min-width:768px){
  .grid{grid-template-columns:repeat(12,minmax(0,1fr))}
  .col-3{grid-column:span 3}
  .col-4{grid-column:span 4}
  .col-5{grid-column:span 5}
  .col-6{grid-column:span 6}
  .col-7{grid-column:span 7}
  .col-8{grid-column:span 8}
  .col-12{grid-column:1 / -1}
}

/* ---------- 6. Surfaces ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(16px,2.5vw,28px);
}
.edge-cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%)}

/* ---------- 7. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 18px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--cream);
  font-size:14px;font-weight:700;letter-spacing:.02em;
  transition:transform 140ms var(--ease),border-color 140ms var(--ease),color 140ms var(--ease),background 140ms var(--ease)
}
.btn:hover{transform:translateY(-2px);border-color:var(--lime);color:var(--lime)}
.btn:active{transform:none}
.btn--primary{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.btn--primary:hover{background:#D8FF6B;border-color:#D8FF6B;color:var(--ink)}
.btn--amber{border-color:rgba(242,160,61,.55);color:var(--amber)}
.btn--amber:hover{background:rgba(242,160,61,.12);border-color:var(--amber);color:var(--amber)}

/* ---------- 8. Breadcrumb ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line)}
.breadcrumb__item a{color:var(--muted);transition:color 140ms var(--ease)}
.breadcrumb__item a:hover{color:var(--lime)}
.breadcrumb__item[aria-current="page"]{color:var(--cream)}

/* ---------- 9. Media foundations ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/9;
  background-color:var(--panel);
  background-image:repeating-linear-gradient(135deg,rgba(58,74,68,.22) 0 1px,transparent 1px 10px);
  border:1px solid var(--line)
}
.media > img{width:100%;height:100%;object-fit:cover;filter:saturate(.72) brightness(.8) contrast(1.06)}
.media::after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(198,242,74,.16)}
.media--wide{aspect-ratio:16/7}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media__cap{
  position:absolute;left:0;bottom:0;padding:6px 10px;
  background:var(--ink);color:var(--lime);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  border-top:1px solid var(--line);border-right:1px solid var(--line)
}

/* ---------- 10. Reveal protocol ---------- */
[data-reveal]{opacity:0;transform:translateY(8px);transition:opacity 240ms var(--ease),transform 240ms var(--ease)}
[data-reveal][data-reveal-state="in"]{opacity:1;transform:none}
[data-reveal][data-reveal-delay="1"]{transition-delay:70ms}
[data-reveal][data-reveal-delay="2"]{transition-delay:140ms}
[data-reveal][data-reveal-delay="3"]{transition-delay:210ms}
[data-section-link]{transition:color 140ms var(--ease),border-color 140ms var(--ease)}
[data-section-link][data-active]{color:var(--lime)}

/* ---------- 11. Header shell ---------- */
.site-header{position:relative;z-index:120}

.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  background:var(--lime);color:var(--ink);
  font-weight:800;font-size:13px;letter-spacing:.08em;
  transform:translateY(-180%);
  transition:transform 140ms var(--ease)
}
.skip-link:focus-visible{transform:translateY(0)}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;
  background:var(--lime);
  transform:scaleX(0);transform-origin:0 50%;
  z-index:150;pointer-events:none;will-change:transform
}

/* ----- mobile bar ----- */
.mobile-bar{
  position:sticky;top:0;z-index:120;
  display:flex;align-items:center;gap:10px;
  min-height:var(--bar-h);
  padding:8px var(--pad-x);
  background:rgba(14,19,17,.95);
  border-bottom:1px solid var(--line)
}
.mobile-bar__brand{
  font-family:var(--font-display);font-weight:900;font-size:16px;
  letter-spacing:.02em;color:var(--cream)
}
.mobile-bar__version{
  display:inline-flex;align-items:center;gap:6px;
  margin-left:auto;padding:4px 8px;
  border:1px solid var(--line);background:var(--panel);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--lime);font-variant-numeric:tabular-nums
}
.mobile-bar__version:hover{border-color:var(--lime)}
.mobile-bar__sep{color:var(--line)}

.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  min-height:40px;padding:8px 10px;
  border:1px solid var(--line);background:var(--panel);color:var(--cream);
  font-size:12px;font-weight:700;letter-spacing:.08em;cursor:pointer;
  transition:border-color 140ms var(--ease),color 140ms var(--ease)
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}
.nav-toggle__bars{display:inline-grid;gap:3px;width:14px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;transition:transform 160ms var(--ease),opacity 120ms var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

/* ----- scrim ----- */
.rail-scrim{
  position:fixed;inset:0;z-index:125;
  background:rgba(14,19,17,.72)
}

/* ----- rail ----- */
.rail{
  position:fixed;top:0;left:0;bottom:0;z-index:130;
  width:var(--rail-w);
  display:flex;flex-direction:column;gap:var(--gap);
  padding:20px 12px 16px;
  overflow:hidden;
  background-color:var(--ink);
  border-right:1px solid var(--line);
  transition:width 200ms var(--ease);
  transform:translateX(0)
}
.rail::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(58,74,68,.32) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(58,74,68,.32) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.42
}
.rail > *{position:relative;z-index:1}

.rail__head{flex:0 0 auto}
.rail__nav{flex:1 1 auto;overflow-y:auto;overflow-x:hidden}
.rail__list{display:grid;gap:4px}
.rail__foot{margin-top:auto;display:grid;gap:8px}

.rail__link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:10px 12px;
  color:var(--muted);
  border:1px solid transparent;
  transition:background 140ms var(--ease),border-color 140ms var(--ease),color 140ms var(--ease)
}
.rail__link:hover,.rail__link:focus-visible{background:var(--panel);border-color:var(--line);color:var(--cream)}
.rail__glyph{
  flex:0 0 28px;width:28px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--line);text-align:left;font-variant-numeric:tabular-nums;
  transition:color 140ms var(--ease)
}
.rail__label{
  font-size:13px;letter-spacing:.04em;white-space:nowrap;
  opacity:0;transform:translateX(-6px);
  transition:opacity 160ms var(--ease),transform 160ms var(--ease)
}
.rail__link[aria-current="page"]{
  background:var(--panel-soft);
  border-color:rgba(198,242,74,.32);
  color:var(--cream)
}
.rail__link[aria-current="page"]::before{
  content:"";position:absolute;left:-1px;top:-1px;bottom:-1px;width:3px;background:var(--lime)
}
.rail__link[aria-current="page"] .rail__glyph{color:var(--lime)}

.brand{display:flex;align-items:center;gap:12px;min-height:40px}
.brand__mark{
  flex:0 0 40px;width:40px;height:40px;
  display:grid;place-items:center;
  background:var(--lime);color:var(--ink);
  font-family:var(--font-display);font-weight:900;font-size:19px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  transition:background 140ms var(--ease)
}
.brand:hover .brand__mark{background:#D8FF6B}
.brand__text{display:flex;flex-direction:column;line-height:1.15;white-space:nowrap;opacity:0;transform:translateX(-6px);transition:opacity 160ms var(--ease),transform 160ms var(--ease)}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:16px;letter-spacing:.02em;color:var(--cream)}
.brand__sub{font-family:var(--font-mono);font-size:9px;letter-spacing:.28em;color:var(--muted)}

.version-tag{
  display:grid;gap:2px;
  padding:8px 10px;
  border:1px solid var(--line);background:var(--panel);
  transition:border-color 140ms var(--ease),background 140ms var(--ease)
}
.version-tag:hover{border-color:var(--lime);background:var(--panel-soft)}
.version-tag__key{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--muted);white-space:nowrap}
.version-tag__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--lime);font-variant-numeric:tabular-nums}
.rail__note{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--muted);
  white-space:nowrap;opacity:0;transform:translateX(-6px);
  transition:opacity 160ms var(--ease),transform 160ms var(--ease)
}

/* ----- desktop expansion ----- */
@media (min-width:1024px) and (hover:hover) and (pointer:fine){
  .rail:hover,.rail:focus-within{width:var(--rail-w-open)}
  .rail:hover .rail__label,.rail:focus-within .rail__label,
  .rail:hover .brand__text,.rail:focus-within .brand__text,
  .rail:hover .rail__note,.rail:focus-within .rail__note{opacity:1;transform:none}
}
@media (min-width:1024px){
  .mobile-bar{display:none}
}

/* ----- mobile drawer ----- */
@media (max-width:1023px){
  body[data-nav-open]{overflow:hidden}
  .rail{
    width:min(300px,86vw);
    transform:translateX(-102%);
    transition:transform 220ms var(--ease);
    padding:18px 16px calc(20px + env(safe-area-inset-bottom));
    overflow-x:hidden;overflow-y:auto
  }
  .rail[data-open]{transform:translateX(0)}
  .rail__label,.brand__text,.rail__note{opacity:1;transform:none}
  .rail__link{padding:14px 12px;border-bottom:1px solid var(--line)}
  .rail__link:last-child{border-bottom:0}
  .rail__glyph{color:var(--muted)}
  .rail__nav{margin-block:8px}
  .version-tag{padding:10px 12px}
}

/* ---------- 12. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,80px);
  padding:clamp(36px,5vw,64px) var(--pad-x) 0;
  background:var(--ink);
  border-top:1px solid var(--line);
  color:var(--cream)
}
.footer__grid{display:grid;gap:var(--gap-l);grid-template-columns:1fr}
@media (min-width:640px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__col--brand{grid-column:span 2}
}
@media (min-width:1024px){
  .footer__grid{grid-template-columns:1.5fr 1fr 1.4fr 1fr}
  .footer__col--brand{grid-column:auto}
}
.footer__col{min-width:0}
.footer__brand{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:900;font-size:20px;letter-spacing:.01em;
  color:var(--cream)
}
.footer__brand::before{content:"";width:8px;height:18px;background:var(--lime)}
.footer__brand:hover{color:var(--lime)}
.footer__pitch{margin-top:14px;max-width:24em;font-size:14px;line-height:1.75;color:var(--muted)}
.footer__chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.footer__chip{
  padding:4px 10px;
  border:1px solid var(--line);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--muted)
}
.footer__title{
  font-family:var(--font-mono);font-size:11px;font-weight:400;
  letter-spacing:.18em;text-transform:uppercase;color:var(--muted);
  margin-bottom:14px
}
.footer__list,.footer__contact,.footer__versions{display:grid;gap:8px;font-size:14px}
.footer__list--legal{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em
}
.footer__list a{color:var(--cream);border-bottom:1px solid transparent;transition:color 140ms var(--ease),border-color 140ms var(--ease)}
.footer__list a:hover,.footer__list a:focus-visible{color:var(--lime);border-bottom-color:var(--lime)}
.footer__list--legal a{color:var(--muted)}
.footer__list--legal a:hover{color:var(--lime)}
.footer__key{
  display:block;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--muted)
}
.footer__val{
  display:block;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
  color:var(--cream);word-break:break-word;font-variant-numeric:tabular-nums
}
.footer__val--lime{color:var(--lime)}
.footer__contact li,.footer__versions li{padding-bottom:8px;border-bottom:1px solid rgba(47,74,63,.5)}
.footer__contact li:last-child,.footer__versions li:last-child{border-bottom:0;padding-bottom:0}

.footer__rule{
  height:6px;
  margin-top:clamp(28px,4vw,48px);
  border-top:1px solid var(--line);
  background-image:repeating-linear-gradient(to right,var(--grid-line) 0 1px,transparent 1px 14px);
  opacity:.6
}
.footer__bar{
  display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;
  padding-block:16px 24px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--muted);font-variant-numeric:tabular-nums
}
.footer__bar-domain{color:var(--line)}
.footer__bar-version{margin-left:auto;color:var(--lime)}

/* ---------- 13. Motion preferences ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important
  }
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .rail{transition:none}
}