/* =========================================================
   必一运动赛场 · 共享样式表  /assets/site.css
   深空蓝底 + 竞技橙强调 + 荧光青数据高亮
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,time{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{width:100%;border-collapse:collapse}

/* ---------- 2. Tokens ---------- */
:root{
  --ink-900:#070D1C;
  --ink-800:#101A33;
  --ink-700:#16223F;
  --ink-paper:#141B2E;
  --line:#22305C;
  --line-soft:rgba(34,48,92,.55);
  --orange:#FF6A1A;
  --orange-light:#FFA45C;
  --cyan:#35F0DC;
  --paper:#F4EFE3;
  --paper-2:#D9D2C4;
  --muted:#97A3C2;
  --white:#FFFFFF;
  --red:#FF3B5C;
  --rail-w:72px;
  --bar-h:64px;
  --maxw:1360px;
  --gutter:clamp(18px,4vw,44px);
  --ease:cubic-bezier(.22,.72,.28,1);
  --font-display:"Archivo Narrow","Oswald","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-sans:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",Georgia,serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
}
@media (min-width:1024px){:root{--bar-h:74px}}

/* ---------- 3. Base ---------- */
body{
  background-color:var(--ink-900);
  color:#E3E9F7;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.7;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background-color:var(--orange);color:var(--ink-900)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
#main-content{display:block;scroll-margin-top:calc(var(--bar-h) + 18px)}
[data-chapter]{scroll-margin-top:calc(var(--bar-h) + 32px)}

/* ---------- 4. Typography ---------- */
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.08;letter-spacing:-.01em;color:var(--white)}
h1{font-size:clamp(30px,5vw,64px)}
h2{font-size:clamp(24px,3.4vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:clamp(17px,1.6vw,20px)}
p{font-size:17px;line-height:1.7}
strong{color:var(--white);font-weight:600}
.serif{font-family:var(--font-serif);font-weight:700;letter-spacing:0}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;font-size:14px}
.lede{font-size:clamp(18px,2vw,21px);line-height:1.65;color:#D5DDEF;max-width:58ch}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);
}
.kicker::before{content:"";display:block;width:18px;height:2px;background-color:var(--orange)}
.rule{height:1px;border:0;background-color:var(--line)}

/* ---------- 5. Utilities ---------- */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;
}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(46px,7vw,96px) 0}
.section--tight{padding:clamp(26px,4vw,52px) 0}
.section__title{font-family:var(--font-display);font-size:clamp(28px,4vw,52px);line-height:1.06;font-weight:800;letter-spacing:-.01em;color:var(--white)}
.section__title--serif{font-family:var(--font-serif);font-weight:700;letter-spacing:0}
.section__lede{margin-top:14px;color:var(--muted);max-width:62ch;font-size:17px}
.page-head{padding-top:calc(var(--bar-h) + clamp(28px,5vw,64px))}
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}

/* ---------- 6. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-display);font-weight:800;font-size:14px;
  letter-spacing:.06em;text-transform:uppercase;line-height:1;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--accent{background-color:var(--orange);color:var(--ink-900)}
.btn--accent:hover{background-color:var(--orange-light)}
.btn--accent:active{transform:translateY(1px)}
.btn--ghost{border-color:var(--line);color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--quiet{background-color:var(--ink-800);border-color:var(--line);color:var(--white)}
.btn--quiet:hover{border-color:var(--orange);color:var(--orange)}

/* ---------- 7. Header : skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 16px;border-radius:2px;
  background-color:var(--cyan);color:var(--ink-900);
  font-weight:700;font-size:14px;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 8. Header : brand rail ---------- */
.site-header{position:relative;z-index:80}
.brand-rail{
  display:none;
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:90;
  flex-direction:column;align-items:center;gap:14px;
  padding:16px 0 20px;
  background-color:rgba(7,13,28,.88);
  border-right:1px solid var(--line);
  transition:background-color .25s var(--ease);
}
.brand-rail__link{display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--white)}
.brand-rail__mark{
  display:grid;place-items:center;width:34px;height:34px;
  background-color:var(--orange);color:var(--ink-900);
  font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.02em;
  transition:background-color .2s var(--ease);
}
.brand-rail__link:hover .brand-rail__mark{background-color:var(--cyan)}
.brand-rail__name{
  writing-mode:vertical-rl;text-orientation:upright;
  font-size:13px;font-weight:600;letter-spacing:.3em;color:var(--muted);
  transition:color .2s var(--ease);
}
.brand-rail__link:hover .brand-rail__name{color:var(--white)}
.brand-rail__ruler{
  flex:1 1 auto;width:12px;align-self:center;
  background-image:
    linear-gradient(to right,transparent 0 6px,rgba(7,13,28,.96) 6px 12px),
    repeating-linear-gradient(to bottom,var(--line) 0 1px,transparent 1px 10px),
    repeating-linear-gradient(to bottom,var(--line-soft) 0 1px,transparent 1px 50px);
}
.brand-rail__top{
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:2px;color:var(--muted);font-size:15px;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),color .2s var(--ease),border-color .2s var(--ease),visibility .25s linear;
}
.brand-rail__top[data-visible]{opacity:1;visibility:visible;transform:none;color:var(--cyan);border-color:var(--cyan)}
.brand-rail__top:hover{background-color:var(--cyan);color:var(--ink-900);border-color:var(--cyan)}

/* ---------- 9. Header : top bar ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:85;
  height:var(--bar-h);
  background-color:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s var(--ease),border-color .25s var(--ease);
}
.site-header[data-scrolled] .topbar{
  background-color:rgba(7,13,28,.95);
  border-bottom-color:var(--line);
  backdrop-filter:blur(10px) saturate(120%);
}
.site-header[data-scrolled] .brand-rail{background-color:rgba(7,13,28,.98)}
.topbar__inner{
  display:flex;align-items:center;gap:clamp(10px,2vw,28px);
  width:100%;max-width:var(--maxw);height:100%;
  margin:0 auto;padding:0 clamp(14px,3vw,30px);
}
.topbar__brand{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:800;font-size:17px;
  letter-spacing:.04em;color:var(--white);
}
.topbar__brand::before{content:"";width:10px;height:10px;background-color:var(--orange)}
.topbar__meta{display:flex;align-items:center;gap:clamp(8px,1.6vw,16px);margin-left:auto}
.stamp{display:inline-flex;align-items:baseline;gap:7px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.stamp__label{display:inline-flex;align-items:center}
.stamp__label::before{
  content:"";display:inline-block;width:6px;height:6px;margin-right:6px;
  background-color:var(--cyan);animation:pulse 2.4s var(--ease) infinite;
}
.stamp__time{color:var(--cyan);font-variant-numeric:tabular-nums;font-size:13px}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}

/* ---------- 10. Header : navigation ---------- */
.navtoggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--line);border-radius:2px;
  color:var(--white);font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.navtoggle:hover{border-color:var(--cyan);color:var(--cyan)}
.navtoggle__bars{position:relative;display:block;width:18px;height:2px;background-color:var(--cyan)}
.navtoggle__bars::before,.navtoggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background-color:var(--cyan);
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.navtoggle__bars::before{top:-6px}
.navtoggle__bars::after{top:6px}
.navtoggle[aria-expanded="true"] .navtoggle__bars{background-color:transparent}
.navtoggle[aria-expanded="true"] .navtoggle__bars::before{top:0;transform:rotate(45deg)}
.navtoggle[aria-expanded="true"] .navtoggle__bars::after{top:0;transform:rotate(-45deg)}
.navtoggle__label{display:none}

.mainnav{
  position:fixed;top:var(--bar-h);left:0;right:0;z-index:84;
  max-height:calc(100vh - var(--bar-h));overflow-y:auto;
  padding:6px 0 18px;
  background-color:rgba(7,13,28,.98);
  border-bottom:1px solid var(--line);
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
}
.mainnav[data-open]{opacity:1;visibility:visible;transform:none}
.mainnav__list{display:flex;flex-direction:column;padding:0 18px}
.mainnav__item{border-bottom:1px solid var(--line-soft)}
.mainnav__item:last-child{border-bottom:0}
.mainnav__link{
  position:relative;display:flex;align-items:baseline;gap:10px;
  padding:16px 2px;color:var(--white);font-size:17px;font-weight:600;letter-spacing:.03em;
  transition:color .2s var(--ease);
}
.mainnav__link::before{
  content:attr(data-idx);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--line);
  transition:color .2s var(--ease);
}
.mainnav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background-color:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .26s var(--ease),background-color .2s var(--ease);
}
.mainnav__link:hover{color:var(--white)}
.mainnav__link:hover::before{color:var(--cyan)}
.mainnav__link:hover::after{transform:scaleX(1)}
.mainnav__link[aria-current="page"]{color:var(--orange)}
.mainnav__link[aria-current="page"]::before{color:var(--orange)}
.mainnav__link[aria-current="page"]::after{transform:scaleX(1);background-color:var(--orange)}

.scrollprogress{
  position:absolute;left:0;bottom:-1px;width:100%;height:2px;
  background-color:var(--orange);transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 11. Footer ---------- */
.site-footer{margin-top:clamp(56px,9vw,132px);background-color:var(--ink-900)}
.footer__rule{height:2px;background-color:var(--orange)}
.footer__inner{width:100%;max-width:var(--maxw);margin:0 auto;padding:clamp(32px,5vw,60px) var(--gutter) 26px}
.footer__top{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 26px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.footer__brand{font-family:var(--font-display);font-size:clamp(22px,3vw,34px);font-weight:800;letter-spacing:.02em;color:var(--white)}
.footer__tagline{color:var(--muted);font-size:15px;letter-spacing:.04em}
.footer__grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(22px,3vw,40px);padding:32px 0 28px;
}
.footer__col{min-width:0}
.footer__col-title{
  margin-bottom:14px;font-family:var(--font-mono);font-size:12px;
  font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);
}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__list--plain{gap:8px}
.footer__link{
  display:inline-block;padding-bottom:1px;color:var(--muted);font-size:15px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer__link:hover{color:var(--white);border-bottom-color:var(--cyan)}
.footer__contact{color:var(--muted);font-family:var(--font-mono);font-size:13px;letter-spacing:.01em;word-break:break-word}
.footer__note{margin-top:12px;color:var(--muted);font-size:13px;line-height:1.6;opacity:.85;max-width:34ch}
.footer__legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  padding-top:20px;border-top:1px solid var(--line);
}
.footer__legal-line,.footer__meta{
  color:var(--muted);font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
}

/* ---------- 12. Components : breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  padding:14px 0;border-bottom:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.breadcrumb__link{color:var(--muted);transition:color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--line)}
.breadcrumb__current{color:var(--white)}

/* ---------- 13. Components : frames / cards / tags ---------- */
.hero-frame{
  position:relative;padding:clamp(22px,3.4vw,48px);
  background-color:rgba(16,26,51,.55);border:1px solid var(--line);
}
.hero-frame::before,.hero-frame::after{content:"";position:absolute;width:15px;height:15px;border:2px solid var(--orange)}
.hero-frame::before{top:-2px;left:-2px;border-right:0;border-bottom:0}
.hero-frame::after{bottom:-2px;right:-2px;border-left:0;border-top:0}

.card{background-color:var(--ink-800);border:1px solid var(--line);border-radius:2px;padding:clamp(16px,2vw,24px)}
.card--paper{background-color:var(--paper);border-color:var(--paper-2);color:var(--ink-paper)}
.card--paper h3,.card--paper h4,.card--paper p{color:inherit}
.paper-stack{
  position:relative;padding:clamp(20px,2.6vw,32px);
  background-color:var(--paper);color:var(--ink-paper);
  box-shadow:6px 6px 0 var(--paper-2);
}
.paper-stack h3,.paper-stack h4{color:var(--ink-paper)}
.paper-stack p{color:#2A3149}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;border:1px solid var(--line);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);
}
.tag--league{border-color:var(--orange);color:var(--orange)}
.tag--data{border-color:var(--cyan);color:var(--cyan)}
.tag--section{border-color:var(--paper-2);color:var(--paper);background-color:rgba(244,239,227,.06)}
.tag--live{border-color:var(--red);color:var(--red)}

.stat{display:flex;flex-direction:column;gap:5px}
.stat__value{
  font-family:var(--font-display);font-weight:800;line-height:1;
  font-size:clamp(26px,3.4vw,44px);color:var(--white);
  font-variant-numeric:tabular-nums;
}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--muted)}
.stat--accent .stat__value{color:var(--orange)}
.stat--data .stat__value{color:var(--cyan)}

/* ---------- 14. Components : index strip / chapter index / scroll rail ---------- */
.index-strip{
  display:flex;flex-wrap:wrap;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted);
}
.index-strip__cell{padding:10px 16px;border-right:1px solid var(--line-soft)}
.index-strip__cell:last-child{border-right:0}
.index-strip__cell--accent{color:var(--orange)}
.index-strip__cell--data{color:var(--cyan)}

.chapter-index{position:sticky;top:calc(var(--bar-h) + 18px);display:flex;flex-direction:column;gap:10px}
.chapter-index__link{
  padding-left:12px;border-left:2px solid transparent;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:var(--muted);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.chapter-index__link:hover{color:var(--white);border-left-color:var(--cyan)}
.chapter-index__link[aria-current="true"]{color:var(--orange);border-left-color:var(--orange)}

.scroll-rail{
  display:flex;gap:clamp(12px,1.8vw,20px);
  overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;
  padding:4px 0 18px;scrollbar-width:thin;
}
.scroll-rail__item{flex:0 0 clamp(236px,30vw,340px);scroll-snap-align:start}
.scroll-rail::-webkit-scrollbar{height:6px}
.scroll-rail::-webkit-scrollbar-track{background-color:var(--ink-800)}
.scroll-rail::-webkit-scrollbar-thumb{background-color:var(--line)}

/* ---------- 15. Components : media frames ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;background-color:var(--ink-800);border:1px solid var(--line);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;left:0;bottom:0;padding:8px 12px;
  background-color:rgba(7,13,28,.86);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--cyan);
}

/* ---------- 16. Components : prose ---------- */
.prose{max-width:72ch;color:#D6DEF0}
.prose p{margin-bottom:1.2em}
.prose h2{margin:1.6em 0 .6em;font-family:var(--font-serif);font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--white)}
.prose h3{margin:1.4em 0 .5em;font-size:clamp(18px,2vw,22px);color:var(--white)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,240,220,.4)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul{display:flex;flex-direction:column;gap:.5em;margin:0 0 1.2em}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:10px;height:2px;background-color:var(--orange)}
.prose blockquote{
  margin:1.6em 0;padding:16px 20px;
  border-left:3px solid var(--orange);background-color:var(--ink-800);
  font-family:var(--font-serif);color:var(--paper);
}

/* ---------- 17. Reveal ---------- */
[data-reveal]{transition:opacity .6s var(--ease),transform .6s var(--ease)}
.has-reveal [data-reveal]{opacity:0;transform:translateY(14px)}
.has-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 18. Desktop ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .brand-rail{display:flex}
  .topbar{left:var(--rail-w)}
  .topbar__brand{display:none}
  .navtoggle{display:none}
  .mainnav{
    position:static;max-height:none;overflow:visible;
    display:flex;flex:1 1 auto;justify-content:center;
    padding:0;background-color:transparent;border-bottom:0;
    opacity:1;visibility:visible;transform:none;transition:none;
  }
  .mainnav__list{flex-direction:row;align-items:center;gap:clamp(8px,1.8vw,26px);padding:0}
  .mainnav__item{border-bottom:0}
  .mainnav__link{padding:9px 2px;font-size:15px;color:var(--muted)}
  .mainnav__link::after{bottom:0}
  .mainnav__link:hover{color:var(--white)}
  .mainnav__link[aria-current="page"]{color:var(--white)}
  .footer__grid{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (max-width:1023px) and (min-width:560px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:559px){
  .footer__grid{grid-template-columns:1fr}
  .stamp__label{display:none}
  .topbar__inner{padding:0 14px}
  .btn{padding:10px 14px;font-size:12px}
}

/* ---------- 19. 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;scroll-behavior:auto!important;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none}
  .stamp__label::before{animation:none}
}