/* ==========================================================
   YOBO体育 · /assets/site.css
   框架式导航 · 夜间赛场指挥中心
   ========================================================== */

/* ---------- 1. 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,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video,picture{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#081C17;
  --ink-deep:#05110E;
  --panel:#0F2A23;
  --moss:#3F5D4E;
  --rock:#7C8A84;
  --cyan:#35F0C8;
  --cyan-press:#1FA88C;
  --orange:#FF6A2B;
  --warm:#F4EFE3;
  --cream:#E8E2D2;
  --clay:#B4643C;
  --rail-h:58px;
  --rail-w:218px;
  --dock-h:60px;
  --shell:1180px;
  --gutter:clamp(18px,4.4vw,52px);
  --line:rgba(124,138,132,.26);
  --line-soft:rgba(124,138,132,.14);
  --font-display:"Helvetica Neue","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Roboto Mono","Courier New",monospace;
}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  padding-top:var(--rail-h);
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 90% at 92% -12%, rgba(53,240,200,.12), transparent 58%),
    radial-gradient(90% 70% at 0% 108%, rgba(255,106,43,.10), transparent 62%),
    repeating-linear-gradient(90deg, rgba(124,138,132,.05) 0 1px, transparent 1px 96px);
  color:var(--warm);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
@media (min-width:640px){ body{font-size:17px} }

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.16;letter-spacing:-.01em}
p{max-width:74ch}

/* ---------- 4. layout ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.site-main{position:relative;padding-block:clamp(26px,4vw,54px) clamp(58px,9vw,116px)}
#main-content{scroll-margin-top:calc(var(--rail-h) + 18px)}
.section{padding-block:clamp(26px,4.2vw,52px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:12px;margin-bottom:clamp(16px,2.4vw,26px);padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2,.grid--3{grid-template-columns:1fr}
@media (min-width:700px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- 5. type ---------- */
.display{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(28px,4.6vw,54px);line-height:1.06;letter-spacing:-.028em;
  color:var(--warm);text-wrap:balance;
}
.display-sm{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(21px,2.6vw,31px);line-height:1.2;letter-spacing:-.015em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange);display:block}
.lede{font-size:clamp(16px,1.5vw,19px);line-height:1.8;color:rgba(244,239,227,.82);max-width:64ch}
.label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--rock);
}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em}

/* ---------- 6. rules & bands ---------- */
.tick-rule{border:0;height:1px;margin-block:clamp(18px,3vw,32px);
  background:linear-gradient(90deg,var(--rock) 0%,rgba(124,138,132,.08) 78%,transparent 100%)}
.tick-band{height:10px;opacity:.72;
  background-image:repeating-linear-gradient(90deg,rgba(124,138,132,.6) 0 1px,transparent 1px 14px)}

/* ---------- 7. buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:11px 20px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;line-height:1.4;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--cyan);color:var(--ink)}
.btn--primary:hover{background:var(--cyan-press);color:var(--warm)}
.btn--ghost{border-color:rgba(244,239,227,.28);color:var(--warm)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- 8. tags, panels, paper ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 9px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;border:1px solid var(--line);border-radius:2px;
  color:var(--cream);background:rgba(63,93,78,.35);
}
.tag--cyan{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.tag--clay{background:var(--clay);border-color:var(--clay);color:var(--cream)}
.tag--moss{background:var(--moss);border-color:var(--moss);color:var(--warm)}
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:3px;
  padding:clamp(16px,2.6vw,30px);
}
.paper{
  background:var(--cream);color:var(--ink);border-radius:2px;
  padding:clamp(18px,2.8vw,32px);
  box-shadow:6px 6px 0 rgba(5,17,14,.55),0 0 0 1px rgba(5,17,14,.35);
}
.paper .label,.paper .media-cap{color:rgba(8,28,23,.62)}

/* ---------- 9. breadcrumb ---------- */
.breadcrumb{margin-bottom:clamp(14px,2vw,22px)}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--rock)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(124,138,132,.55)}
.breadcrumb a{color:rgba(244,239,227,.7);border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--cyan)}

/* ---------- 10. tabs ---------- */
.tablist{display:flex;flex-wrap:wrap;gap:2px;border-bottom:1px solid var(--line)}
.tab{
  padding:10px 16px;border-bottom:2px solid transparent;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--rock);transition:color .16s ease,background-color .16s ease,border-color .16s ease;
}
.tab:hover{color:var(--warm);background:rgba(53,240,200,.05)}
.tab[aria-selected="true"]{
  color:var(--cyan);border-bottom-color:var(--cyan);background:rgba(53,240,200,.08);
}
.tabpanel{padding-top:clamp(16px,3vw,28px)}
.tabpanel[hidden]{display:none}

/* ---------- 11. media frames ---------- */
.media-frame{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:3px;
  aspect-ratio:16/9;
  background:linear-gradient(135deg,#0F2A23 0%,#081C17 58%,#132F27 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(53,240,200,.1) 0 1px,transparent 1px 30px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-cap{margin-top:9px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.1em;color:var(--rock)}

/* ---------- 12. reveal ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(16px);
  transition:opacity .5s ease,transform .5s ease}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  background:var(--cyan);color:var(--ink);
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.1em;
  padding:10px 16px;border-radius:2px;
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 14. header ---------- */
.site-header{position:relative;z-index:60}
.header-rail{
  position:fixed;top:0;left:0;right:0;height:var(--rail-h);z-index:60;
  display:flex;align-items:center;gap:clamp(10px,2vw,28px);
  padding-inline:clamp(14px,2.4vw,26px);
  background:rgba(5,17,14,.95);
  border-bottom:1px solid rgba(124,138,132,.28);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.rail-brand{display:inline-flex;align-items:center;gap:9px;min-height:44px}
.brand-mark{
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  background:var(--cyan);color:var(--ink);padding:5px 7px;border-radius:2px;line-height:1;
}
.brand-word{
  font-family:var(--font-display);font-weight:800;font-size:17px;
  letter-spacing:.02em;color:var(--warm);white-space:nowrap;
}
.brand-word-sub{color:var(--cyan);margin-left:2px}
.brand-tag{display:none;font-family:var(--font-mono);font-size:10px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--rock);padding:3px 8px;
  border:1px solid rgba(124,138,132,.42);border-radius:999px;white-space:nowrap}
.rail-meta{display:none;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--rock)}
.rail-dot{width:6px;height:6px;border-radius:50%;background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,106,43,.18)}
.rail-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.quick-action{
  display:none;align-items:center;gap:8px;
  padding:8px 14px;border:1px solid rgba(53,240,200,.4);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.14em;
  color:var(--cyan);white-space:nowrap;
  transition:background-color .18s ease,color .18s ease;
}
.quick-action:hover{background:var(--cyan);color:var(--ink)}
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 12px;border:1px solid rgba(53,240,200,.4);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.16em;
  color:var(--cyan);
}
.nav-toggle:hover{background:rgba(53,240,200,.1)}
.nav-toggle-label{text-transform:uppercase}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{display:block;height:2px;background:currentColor;
  transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(2.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-2.5px) rotate(-45deg)}
.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(124,138,132,.18)}
.scroll-meter-fill{display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear}

/* nav: mobile drawer first */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:58;
  max-height:100vh;overflow-y:auto;
  padding:calc(var(--rail-h) + 24px) var(--gutter) 30px;
  background:linear-gradient(180deg,#0B231D 0%,#061511 78%);
  border-bottom:1px solid rgba(53,240,200,.3);
  transform:translateY(-102%);opacity:0;visibility:hidden;
  transition:transform .28s ease,opacity .2s ease,visibility .28s;
}
.site-nav[data-open]{transform:translateY(0);opacity:1;visibility:visible}
.nav-heading{font-family:var(--font-mono);font-size:10px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--rock);margin-bottom:12px}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-link{
  display:flex;align-items:baseline;gap:12px;
  padding:11px 12px;border-left:2px solid transparent;border-radius:2px;
  color:rgba(244,239,227,.74);
  transition:color .16s ease,background-color .16s ease,border-color .16s ease,padding-left .16s ease;
}
.nav-link:hover{color:var(--warm);border-left-color:var(--cyan-press);background:rgba(53,240,200,.06);padding-left:16px}
.nav-link[aria-current="page"]{
  color:var(--cyan);border-left-color:var(--cyan);
  background:rgba(53,240,200,.1);
}
.nav-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--rock);flex:none}
.nav-link[aria-current="page"] .nav-num{color:var(--cyan)}
.nav-text{font-size:15px;font-weight:600;letter-spacing:.02em}
.nav-note{margin-top:22px;padding-top:16px;border-top:1px dashed rgba(124,138,132,.3);
  font-size:12px;line-height:1.75;color:rgba(124,138,132,1);max-width:32ch}
@media (max-width:1023px){
  body{padding-bottom:calc(var(--dock-h) + env(safe-area-inset-bottom,0px))}
  body.nav-open{overflow:hidden}
}

/* mobile dock */
.mobile-dock{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  background:rgba(5,17,14,.97);
  border-top:1px solid rgba(53,240,200,.26);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
.dock-link{
  display:flex;align-items:center;justify-content:center;
  padding:15px 6px;min-height:var(--dock-h);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:rgba(244,239,227,.78);
  border-right:1px dashed rgba(124,138,132,.28);
  transition:color .16s ease,background-color .16s ease;
}
.dock-link:last-child{border-right:0}
.dock-link:hover,.dock-link:focus-visible{color:var(--cyan);background:rgba(53,240,200,.08)}

/* ---------- 15. footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(36px,6vw,84px);
  background:var(--ink-deep);border-top:1px solid rgba(124,138,132,.26);
}
.footer-scale{height:10px;
  background-image:repeating-linear-gradient(90deg,rgba(53,240,200,.32) 0 1px,transparent 1px 16px);
  border-bottom:1px solid rgba(124,138,132,.16)}
.footer-inner{max-width:var(--shell);margin-inline:auto;
  padding:clamp(30px,5vw,58px) var(--gutter) 0}
.footer-grid{display:grid;gap:clamp(24px,4vw,44px);grid-template-columns:1fr}
.footer-brand{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.foot-brand-link{display:inline-flex;align-items:center;gap:10px}
.footer-mark{
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.06em;
  background:var(--cyan);color:var(--ink);padding:5px 7px;border-radius:2px;line-height:1;
}
.footer-word{font-family:var(--font-display);font-weight:800;font-size:18px;
  letter-spacing:.02em;color:var(--warm)}
.footer-line{font-size:13.5px;line-height:1.75;color:rgba(244,239,227,.66);max-width:30ch}
.footer-addr{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--rock);line-height:1.8;max-width:26ch}
.footer-col{display:flex;flex-direction:column;gap:10px;
  padding-top:14px;border-top:1px solid var(--line)}
.footer-heading{font-family:var(--font-mono);font-size:10.5px;font-weight:700;
  letter-spacing:.26em;text-transform:uppercase;color:var(--cyan)}
.footer-heading--sub{margin-top:14px}
.footer-list{display:flex;flex-direction:column;gap:8px;font-size:13.5px}
.footer-list a{color:rgba(244,239,227,.74);border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-list--plain li{color:rgba(244,239,227,.6);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em}
.footer-contact{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:rgba(244,239,227,.8);max-width:none;word-break:break-word}
.footer-note{margin-top:clamp(22px,3.6vw,36px);padding:14px 0;
  border-top:1px dashed rgba(124,138,132,.3);
  font-size:12px;line-height:1.8;color:var(--rock);max-width:78ch}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 0 calc(20px + env(safe-area-inset-bottom,0px));
  border-top:1px solid var(--line);
}
.footer-legal{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:rgba(124,138,132,.95);max-width:none}
.footer-icp{color:rgba(244,239,227,.7)}
.footer-mono{font-family:var(--font-mono);font-size:10px;letter-spacing:.26em;
  text-transform:uppercase;color:rgba(124,138,132,.7);max-width:none}

/* ---------- 16. breakpoints ---------- */
@media (min-width:760px){
  .brand-tag{display:inline-flex}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
}
@media (min-width:900px){
  .rail-meta{display:flex}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .quick-action{display:inline-flex}
  .nav-toggle{display:none}
  .mobile-dock{display:none}
  .site-nav{
    position:fixed;top:var(--rail-h);left:0;bottom:0;right:auto;
    width:var(--rail-w);max-height:none;
    padding:26px 16px 22px;
    border-right:1px solid rgba(124,138,132,.24);
    border-bottom:0;
    background:linear-gradient(180deg,#0B231D 0%,#071915 100%);
    transform:none;opacity:1;visibility:visible;
    display:flex;flex-direction:column;
    transition:none;
  }
  .nav-note{margin-top:auto}
  .footer-grid{grid-template-columns:1.4fr .85fr .85fr 1fr}
  .footer-col{padding-top:0;border-top:0}
  .footer-brand{padding-right:clamp(8px,2vw,28px);border-right:1px dashed rgba(124,138,132,.24)}
}
@media (min-width:1280px){
  :root{--rail-w:236px}
}

/* ---------- 17. 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}
  html.js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
  .nav-link:hover{padding-left:12px}
  .scroll-meter-fill{transition:none}
}