/* ============================================================
   三亿体育 · 共享站点样式 /assets/site.css
   夜间赛事指挥台：品牌轨道 + 双层信息带 + 切角面板
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:150px}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}
a{color:inherit}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
figure{margin:0}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#04110E;
  --deep:#07211B;
  --panel:#0B2F27;
  --panel-2:#0E3A31;
  --line:#1C5C4F;
  --line-soft:rgba(28,92,79,.45);
  --cyan:#19E6D0;
  --lime:#B6FF3B;
  --orange:#FF8A3D;
  --text:#E8F5EF;
  --muted:#9BB8AE;
  --paper:#F4F7F2;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-mono:"SFMono-Regular",ui-monospace,"JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --rail-w:92px;
  --wrap:1320px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --gap:18px;
}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 70% at 88% -12%, rgba(25,230,208,.10), transparent 58%),
    radial-gradient(90% 60% at -10% 108%, rgba(255,138,61,.07), transparent 55%);
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--cyan);color:var(--ink)}
h1,h2,h3{font-weight:900;letter-spacing:-.01em;line-height:1.14}
a{text-decoration:none}
strong,b{font-weight:800;color:var(--text)}
small{font-size:12px}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px}

/* ---------- 4. layout utilities ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(16px,3vw,40px)}
.section{padding-block:clamp(40px,6vw,88px)}
.section--tight{padding-block:clamp(24px,3.4vw,46px)}
.stack{display:grid;gap:var(--gap)}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:var(--gap)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,28px)}
.grid-12>*{min-width:0}
.rule{height:1px;background:var(--line-soft);border:0;margin:0}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.prose{max-width:42rem}
.prose p{margin-bottom:1.05em;color:var(--muted);line-height:1.85}
.prose h2{margin:1.6em 0 .6em;font-size:clamp(20px,2.2vw,26px);font-weight:900;color:var(--text)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(25,230,208,.4)}
.prose a:hover{border-bottom-color:var(--cyan)}

/* ---------- 5. type utilities ---------- */
.t-display{font-size:clamp(44px,7.6vw,104px);font-weight:900;line-height:.98;letter-spacing:-.03em}
.t-title{font-size:clamp(26px,3.4vw,40px);font-weight:900;line-height:1.14;letter-spacing:-.015em}
.t-sub{font-size:clamp(18px,1.9vw,22px);font-weight:800;line-height:1.35;letter-spacing:-.01em}
.lede{font-size:clamp(15px,1.3vw,18px);line-height:1.8;color:var(--muted);max-width:34em}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--cyan);line-height:1}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime);flex:0 0 auto}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.data-num{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums;font-size:clamp(28px,4vw,48px);line-height:1;color:var(--lime);letter-spacing:-.02em}

/* ---------- 6. components ---------- */
.panel{background:var(--panel);box-shadow:inset 0 0 0 1px var(--line);padding:clamp(18px,2.4vw,28px);transition:box-shadow .2s var(--ease),background-color .2s var(--ease)}
.panel:hover{box-shadow:inset 0 0 0 1px rgba(25,230,208,.5)}
.cut{--cut:16px;clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px;border:1px solid var(--line);background:transparent;color:var(--text);font-size:14px;font-weight:800;letter-spacing:.06em;cursor:pointer;transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.btn--ghost{color:var(--cyan);border-color:rgba(25,230,208,.45)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:rgba(25,230,208,.1);border-color:var(--cyan);color:var(--text)}
.btn--quiet{color:var(--muted);border-color:var(--line-soft)}
.btn--quiet:hover,.btn--quiet:focus-visible{color:var(--text);border-color:var(--line)}

.crumbs{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center}
.crumbs li+li::before{content:"/";color:var(--line);margin-right:8px}
.crumbs a{color:var(--muted);transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--text)}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);background:rgba(25,230,208,.08);border:1px solid rgba(25,230,208,.3);line-height:1.5}
.tag--lime{color:var(--lime);background:rgba(182,255,59,.08);border-color:rgba(182,255,59,.32)}
.tag--warm{color:var(--orange);background:rgba(255,138,61,.1);border-color:rgba(255,138,61,.35)}

.data-bar{position:relative;height:6px;background:rgba(28,92,79,.35);overflow:hidden}
.data-bar span{display:block;height:100%;width:calc(var(--v,50) * 1%);background:var(--lime)}
.data-bar--cyan span{background:var(--cyan)}
.data-bar--warm span{background:var(--orange)}

.img-frame{position:relative;display:block;overflow:hidden;aspect-ratio:16/10;background:linear-gradient(160deg,var(--panel) 0%,var(--ink) 100%);box-shadow:inset 0 0 0 1px var(--line)}
.img-frame>img,.img-frame>picture>img{width:100%;height:100%;object-fit:cover;display:block}
.img-frame::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,transparent 52%,rgba(4,17,14,.78))}
.img-frame:empty::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(135deg,rgba(25,230,208,.12) 0 1px,transparent 1px 16px);opacity:.65}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--tall{aspect-ratio:4/5}
.img-frame--square{aspect-ratio:1/1}

/* ---------- 7. skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:11px 20px;background:var(--lime);color:var(--ink);
  font-size:13px;font-weight:800;letter-spacing:.06em;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  transform:translateY(-180%);transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0);outline:none}

/* ---------- 8. header ---------- */
.sanyi-header{
  position:sticky;top:0;z-index:90;
  display:grid;grid-template-columns:var(--rail-w) minmax(0,1fr);
  background:var(--deep);
  border-bottom:1px solid var(--line);
}
.sanyi-rail{
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  gap:12px;padding:14px 6px 12px;
  background:var(--ink);
  border-right:1px solid var(--line);
}
.brand-mark{display:flex;flex-direction:row;align-items:center;gap:9px;color:var(--text)}
.brand-glyph{display:grid;gap:3px;width:26px;flex:0 0 auto}
.brand-glyph i{display:block;height:4px;transform:skewX(-18deg);transition:background-color .2s var(--ease),width .2s var(--ease)}
.brand-glyph i:nth-child(1){width:26px;background:var(--cyan)}
.brand-glyph i:nth-child(2){width:18px;background:var(--lime)}
.brand-glyph i:nth-child(3){width:10px;background:var(--orange)}
.brand-mark:hover .brand-glyph i:nth-child(1){width:18px}
.brand-mark:hover .brand-glyph i:nth-child(3){width:20px}
.brand-wordmark{writing-mode:vertical-rl;font-size:13px;font-weight:900;letter-spacing:.3em;line-height:1;color:var(--text)}
.rail-status{display:flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:9px;letter-spacing:.02em;color:var(--muted);white-space:nowrap}
.rail-dot{width:5px;height:5px;flex:0 0 auto;border-radius:50%;background:var(--lime);box-shadow:0 0 0 3px rgba(182,255,59,.16)}

.header-main{display:flex;flex-direction:column;min-width:0}
.header-top{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:40px;padding:0 clamp(14px,2vw,28px);
  border-bottom:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--muted);
}
.header-brandline{display:flex;align-items:center;color:var(--text);letter-spacing:.14em;white-space:nowrap}
.header-brandline .sep{color:var(--cyan);opacity:.65;margin-inline:.62em}
.header-coord{color:rgba(155,184,174,.55);letter-spacing:.18em;white-space:nowrap}
.header-utility{display:flex;align-items:center;gap:8px;white-space:nowrap}
.tick{width:6px;height:6px;flex:0 0 auto;background:var(--cyan);transform:rotate(45deg)}

.header-bar{
  display:flex;align-items:center;gap:clamp(10px,1.6vw,22px);
  min-height:88px;padding:10px clamp(14px,2vw,28px);
}
.site-nav{margin-right:auto;min-width:0}
.nav-list{display:flex;align-items:center;flex-wrap:wrap;gap:2px;counter-reset:nav}
.nav-list li{counter-increment:nav}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:9px 12px 11px;border:1px solid transparent;
  color:var(--muted);font-size:15px;font-weight:700;letter-spacing:.02em;
  transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-link::before{content:counter(nav,decimal-leading-zero);font-family:var(--font-mono);font-size:9px;font-weight:400;color:var(--line);transform:translateY(-.35em);transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--lime);transform:scaleX(0);transform-origin:0 50%;transition:transform .2s var(--ease)}
.nav-link:hover,.nav-link:focus-visible{color:var(--text);background:rgba(25,230,208,.06);border-color:var(--line-soft)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan);background:rgba(25,230,208,.09);border-color:rgba(25,230,208,.35)}
.nav-link[aria-current="page"]::before{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.header-cta{
  --cut:10px;flex:0 0 auto;
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 18px;background:var(--lime);color:var(--ink);
  font-size:13px;font-weight:800;letter-spacing:.08em;white-space:nowrap;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.header-cta::after{content:"→";font-family:var(--font-mono);font-weight:400}
.header-cta:hover,.header-cta:focus-visible{background:var(--cyan);color:var(--ink)}
.header-cta:focus-visible{outline:none;filter:drop-shadow(0 0 2px var(--lime)) drop-shadow(0 0 10px rgba(182,255,59,.55))}

.nav-toggle{display:none;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--line);color:var(--text);font-size:13px;font-weight:800;letter-spacing:.16em;transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease)}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-box{display:grid;gap:4px;width:18px;flex:0 0 auto}
.nav-toggle-box i{display:block;height:2px;width:100%;background:var(--cyan);transform-origin:center;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.sanyi-header[data-open] .nav-toggle-box i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.sanyi-header[data-open] .nav-toggle-box i:nth-child(2){opacity:0}
.sanyi-header[data-open] .nav-toggle-box i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-text{line-height:1}

/* ---------- 9. footer ---------- */
.sanyi-footer{
  position:relative;margin-top:clamp(56px,8vw,120px);
  background:var(--deep);
  border-top:1px solid var(--line);
  color:var(--text);
}
.footer-crest{
  background:var(--ink);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 40px),0 100%);
  padding:clamp(30px,4.5vw,60px) 0 calc(clamp(30px,4.5vw,60px) + 40px);
}
.footer-crest-inner{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(16px,3vw,40px);display:grid;gap:18px}
.footer-eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.32em;text-transform:uppercase;color:var(--cyan);line-height:1}
.footer-wordmark{font-size:clamp(36px,7vw,76px);font-weight:900;line-height:1;letter-spacing:.14em;color:var(--paper)}
.footer-meter{display:flex;flex-wrap:wrap;gap:14px clamp(24px,4vw,56px);font-family:var(--font-mono);padding-top:6px}
.footer-meter li{display:grid;gap:6px}
.meter-num{font-size:clamp(22px,3vw,32px);line-height:1;font-weight:700;color:var(--lime);letter-spacing:-.01em}
.meter-key{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}

.footer-body{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(32px,5vw,64px) clamp(16px,3vw,40px);
  display:grid;grid-template-columns:minmax(0,1.6fr) repeat(2,minmax(0,1fr));
  gap:clamp(24px,4vw,56px);
}
.footer-col{min-width:0}
.footer-summary{font-size:15px;line-height:1.85;color:var(--muted);max-width:34em;border-left:2px solid var(--line);padding-left:14px}
.footer-contact{margin-top:22px;display:grid;gap:9px;font-size:13px}
.footer-contact li{display:flex;gap:12px;align-items:baseline;flex-wrap:wrap}
.contact-key{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--line);min-width:32px;flex:0 0 auto}
.contact-value{color:var(--text);font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;word-break:break-all}
.footer-contact a{color:var(--cyan);border-bottom:1px solid rgba(25,230,208,.35)}
.footer-contact a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.footer-note{margin-top:16px;font-size:12px;line-height:1.75;color:rgba(155,184,174,.82);max-width:36em}
.footer-col-title{font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--cyan);padding-bottom:10px;border-bottom:1px solid var(--line-soft);margin-bottom:14px}
.footer-links ul{display:grid;gap:2px}
.footer-links a{display:flex;align-items:center;gap:9px;padding:8px 0;font-size:14px;color:var(--muted);transition:color .18s var(--ease)}
.footer-links a::before{content:"";width:6px;height:1px;background:var(--line);flex:0 0 auto;transition:width .2s var(--ease),background-color .2s var(--ease)}
.footer-links a:hover,.footer-links a:focus-visible{color:var(--text)}
.footer-links a:hover::before,.footer-links a:focus-visible::before{width:16px;background:var(--cyan)}

.footer-base{border-top:1px solid var(--line-soft)}
.footer-base{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;padding:18px clamp(16px,3vw,40px);max-width:var(--wrap);margin-inline:auto}
.footer-copy{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:rgba(155,184,174,.85);line-height:1.6}
.footer-legal{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:12px}
.footer-legal a{color:var(--muted);transition:color .18s var(--ease)}
.footer-legal a:hover,.footer-legal a:focus-visible{color:var(--lime)}
.footer-signal{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;color:rgba(28,92,79,.95);line-height:1.6}

/* ---------- 10. script-injected ---------- */
.scroll-meter{position:fixed;top:0;left:0;right:0;height:3px;z-index:120;background:rgba(28,92,79,.3);pointer-events:none}
.scroll-meter-bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--cyan),var(--lime));will-change:transform}
.to-top{
  position:fixed;right:clamp(12px,2vw,26px);bottom:clamp(12px,2vw,26px);z-index:110;
  --cut:12px;
  display:grid;place-items:center;gap:2px;width:54px;height:54px;padding:0;
  background:var(--panel);color:var(--cyan);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear,background-color .2s var(--ease),color .2s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--cyan);color:var(--ink)}
.to-top:focus-visible{outline:none;filter:drop-shadow(0 0 2px var(--lime)) drop-shadow(0 0 10px rgba(182,255,59,.55))}
.to-top-arrow{font-size:15px;line-height:1}
.to-top-label{font-family:var(--font-mono);font-size:9px;letter-spacing:.16em;line-height:1}

/* ---------- 11. responsive ---------- */
@media (max-width:1180px){
  .header-coord{display:none}
  .nav-link{font-size:14px;padding:9px 10px 11px}
  .nav-link::after{left:10px;right:10px}
}
@media (max-width:1024px){
  .footer-body{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  html{scroll-padding-top:132px}
  .sanyi-header{grid-template-columns:minmax(0,1fr)}
  .sanyi-rail{flex-direction:row;align-items:center;justify-content:flex-start;gap:14px;padding:10px 16px;border-right:0;border-bottom:1px solid var(--line)}
  .brand-mark{flex-direction:row;gap:10px}
  .brand-wordmark{writing-mode:horizontal-tb;letter-spacing:.2em;font-size:14px}
  .rail-status{margin-left:auto;font-size:10px}
  .header-top{display:none}
  .header-bar{min-height:60px;gap:12px;padding:8px 16px;flex-wrap:nowrap}
  .nav-toggle{display:inline-flex}
  .header-cta{margin-left:auto;font-size:12px;padding:10px 14px}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;display:none;
    background:var(--deep);border-bottom:1px solid var(--line);
    box-shadow:0 36px 44px -34px #000;
    padding:10px 14px 18px;max-height:72vh;overflow:auto;
  }
  .sanyi-header[data-open] .site-nav{display:block;animation:navDrop .22s var(--ease)}
  .nav-list{flex-direction:column;align-items:stretch;gap:3px;counter-reset:nav}
  .nav-link{width:100%;padding:13px 14px;font-size:16px;border:1px solid var(--line-soft);border-left:2px solid transparent}
  .nav-link::after{left:auto;right:14px;bottom:auto;top:50%;width:3px;height:16px;margin-top:-8px;transform:scaleY(0);transform-origin:50% 0}
  .nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleY(1)}
  .nav-link[aria-current="page"]{border-left-color:var(--cyan)}
  .nav-link[aria-current="page"]::after{transform:scaleY(1)}
  body{background-attachment:scroll}
}
@keyframes navDrop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
@media (max-width:640px){
  .footer-crest{clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),0 100%);padding-bottom:calc(clamp(30px,4.5vw,60px) + 22px)}
  .footer-body{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-base{justify-content:flex-start}
  .footer-signal{display:none}
  .brand-wordmark{font-size:13px}
  .rail-status{font-size:9px;letter-spacing:0}
  .t-display{letter-spacing:-.02em}
}

/* ---------- 12. reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}