/* ============================================================
   K1体育3915 · 共享站点样式 /assets/site.css
   夜间赛场直播控制台：深墨绿底 + 荧光青信号 + 橙红赛程 + 金属银数据
   ============================================================ */

/* ---------- 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,figcaption,blockquote,dl,dd,table,th,td{margin:0;padding:0}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
img,svg,picture,video,canvas{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#05100D;
  --ink-deep:#0A1F19;
  --panel:#102E26;
  --line:#1E4A40;
  --cyan:#28F0C2;
  --blue:#5FD8FF;
  --orange:#FF5B2E;
  --amber:#F7B955;
  --silver:#B8C7C4;
  --text:#EAF7F2;
  --muted:#9AB5AC;
  --light:#F0F6F3;
  --light-ink:#0A1512;

  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","Source Han Sans SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --step:8px;
  --gutter:clamp(16px,4vw,48px);
  --shell:1280px;
  --cut:8deg;
  --shadow-hard:6px 6px 0 rgba(5,16,13,.62);
  --shadow-lift:10px 10px 0 rgba(5,16,13,.55);
}

/* ---------- 3. Base / 中文排版 ---------- */
body{
  min-height:100vh;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(90deg,rgba(30,74,64,.22) 0 1px,transparent 1px 80px),
    repeating-linear-gradient(0deg,rgba(30,74,64,.14) 0 1px,transparent 1px 80px);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.1;
  letter-spacing:-.01em;
  text-wrap:balance;
}
strong,b{font-weight:700}
::selection{background:var(--cyan);color:#04120E}

.display-xl{font-size:clamp(2.6rem,7vw,5.4rem);font-weight:900;line-height:.98;text-transform:uppercase}
.h1{font-size:clamp(2.1rem,4.6vw,3.6rem)}
.h2{font-size:clamp(1.7rem,3.2vw,2.7rem)}
.h3{font-size:clamp(1.25rem,2vw,1.6rem)}
.lede{font-size:clamp(1rem,1.3vw,1.12rem);line-height:1.85;color:var(--muted);max-width:64ch}
.prose{font-size:16px;line-height:1.9;color:var(--text);max-width:70ch}
.prose p+p{margin-top:1em}
.prose a{color:var(--blue);border-bottom:1px solid rgba(95,216,255,.45)}
.prose a:hover{color:var(--cyan);border-color:var(--cyan)}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";display:block;width:26px;height:1px;background:var(--cyan)}

/* ---------- 4. Utilities / Layout ---------- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.page-shell{width:min(100% - var(--gutter) * 2,var(--shell));margin-inline:auto}
.section{padding:clamp(56px,8vw,112px) 0}
.section--tight{padding:clamp(32px,4vw,56px) 0}
.section--light{background:var(--light);color:var(--light-ink)}
.section--light .lede,.section--light .prose{color:#2C3A36}
.section--panel{background:var(--ink-deep);border-block:1px solid var(--line)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--reverse{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}

.rule{height:1px;background:var(--line);border:0}

/* ---------- 5. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;
  font-family:var(--font-body);font-size:14px;font-weight:700;line-height:1;
  letter-spacing:.02em;color:var(--text);
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--cyan);color:#04120E;box-shadow:4px 4px 0 rgba(40,240,194,.2)}
.btn-primary:hover{background:#56FFD8;transform:translate(-1px,-1px);box-shadow:6px 6px 0 rgba(40,240,194,.26)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(40,240,194,.08)}
.btn-orange{background:var(--orange);color:#160402;box-shadow:4px 4px 0 rgba(255,91,46,.22)}
.btn-orange:hover{background:#FF7551;transform:translate(-1px,-1px)}
.btn-block{width:100%}

/* ---------- 6. Tags / Stats / Panels ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);background:rgba(16,46,38,.72);border:1px solid var(--line);
}
.tag--cyan{color:var(--cyan);border-color:rgba(40,240,194,.5);background:rgba(40,240,194,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,91,46,.5);background:rgba(255,91,46,.08)}
.tag--amber{color:var(--amber);border-color:rgba(247,185,85,.5);background:rgba(247,185,85,.08)}

.stat{
  display:flex;flex-direction:column;gap:6px;
  padding:16px 18px;
  background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow-hard);
}
.stat-value{
  font-family:var(--font-mono);font-size:clamp(1.4rem,2.6vw,2.1rem);font-weight:600;
  line-height:1;color:var(--cyan);font-variant-numeric:tabular-nums;
}
.stat-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}

.panel{
  position:relative;
  padding:clamp(20px,2.6vw,32px);
  background:var(--panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow-lift);
}
.panel-head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px;
  padding-bottom:14px;margin-bottom:18px;border-bottom:1px dashed rgba(30,74,64,.9);
}
.panel-title{font-family:var(--font-display);font-size:1.15rem;font-weight:800;letter-spacing:.01em}

/* ---------- 7. Breadcrumbs ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-top:22px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
}
.breadcrumbs a{color:var(--silver);padding-bottom:1px;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.breadcrumbs a:hover{color:var(--cyan);border-color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--cyan)}
.crumb-sep{color:var(--line)}

/* ---------- 8. Media 容器 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  background:
    repeating-linear-gradient(135deg,rgba(30,74,64,.55) 0 1px,transparent 1px 14px),
    linear-gradient(140deg,var(--panel),var(--ink-deep));
  border:1px solid var(--line);
  box-shadow:var(--shadow-lift);
}
.media > img,.media > picture > img{width:100%;height:100%;object-fit:cover;display:block}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(5,16,13,0) 46%,rgba(5,16,13,.78) 100%);
}
.media--wide{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--band{aspect-ratio:21/9}
.media--empty::before{
  content:"IMAGE SLOT";position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;color:rgba(184,199,196,.42);
}
.media-caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;
  padding:12px 16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--silver);
  border-top:1px solid rgba(40,240,194,.28);
  background:linear-gradient(0deg,rgba(5,16,13,.92),rgba(5,16,13,.35));
}

/* ---------- 9. Header ---------- */
.skip-link{
  position:absolute;left:12px;top:-80px;z-index:300;
  padding:12px 18px;
  font-family:var(--font-body);font-size:14px;font-weight:700;
  color:#04120E;background:var(--cyan);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:top .18s ease;
}
.skip-link:focus{top:12px}

.site-header{
  position:sticky;top:0;z-index:120;
  background:linear-gradient(180deg,rgba(5,16,13,.97),rgba(5,16,13,.9));
  border-bottom:1px solid var(--line);
  color:var(--text);
  backdrop-filter:blur(10px);
}

.header-rail{
  display:flex;align-items:center;gap:16px;
  padding:6px var(--gutter);
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
  background:var(--ink-deep);
  border-bottom:1px solid rgba(30,74,64,.75);
}
.rail-item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.rail-spacer{flex:1 1 auto}
.signal-dot{
  display:inline-block;width:6px;height:6px;flex:0 0 auto;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 0 rgba(40,240,194,.55);
  animation:signalPulse 2.6s ease-out infinite;
}
@keyframes signalPulse{
  0%{box-shadow:0 0 0 0 rgba(40,240,194,.5)}
  70%{box-shadow:0 0 0 7px rgba(40,240,194,0)}
  100%{box-shadow:0 0 0 0 rgba(40,240,194,0)}
}

.header-main{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:10px var(--gutter);
  transition:padding .2s ease;
}
.site-header[data-scrolled] .header-main{padding-top:6px;padding-bottom:6px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  display:grid;place-items:center;
  width:44px;height:44px;
  font-family:var(--font-display);font-size:20px;font-weight:900;letter-spacing:.02em;
  color:var(--cyan);
  background:linear-gradient(135deg,rgba(40,240,194,.18),rgba(40,240,194,0) 62%);
  border:2px solid var(--cyan);
  clip-path:polygon(0 0,100% 0,100% 70%,76% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-family:var(--font-display);font-size:20px;font-weight:800;letter-spacing:.02em;color:var(--text)}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;font-weight:600;
  letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
}
.brand:hover .brand-name{color:var(--cyan)}

.primary-nav{display:flex;align-items:center;gap:clamp(8px,1.6vw,26px)}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:7px;
  padding:11px 12px;
  font-size:14px;font-weight:500;color:var(--muted);
  transition:color .18s ease,background .18s ease,box-shadow .18s ease;
}
.nav-index{
  font-family:var(--font-mono);font-size:10px;font-weight:600;
  letter-spacing:.08em;color:rgba(154,181,172,.6);
  font-variant-numeric:tabular-nums;
  transition:color .18s ease;
}
.nav-label{position:relative}
.nav-link:hover,.nav-link:focus-visible{color:var(--text);background:rgba(40,240,194,.08)}
.nav-link:hover .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]{
  color:var(--text);
  background:linear-gradient(90deg,rgba(40,240,194,.2),rgba(40,240,194,.02));
  box-shadow:inset 0 -2px 0 0 var(--cyan);
}
.nav-link[aria-current="page"] .nav-index{color:var(--cyan)}

.nav-actions{
  display:flex;align-items:center;gap:10px;
  padding-left:clamp(12px,1.6vw,24px);
  border-left:1px solid var(--line);
}
.nav-actions .btn{font-size:13px;padding:11px 14px}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--text);
  background:var(--panel);border:1px solid var(--line);cursor:pointer;
  transition:border-color .2s,color .2s,background .2s;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:4px;width:18px}
.nav-toggle-bars span{display:block;height:2px;background:var(--cyan);transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(30,74,64,.65);pointer-events:none;
}
.scroll-progress > span{
  display:block;height:100%;width:100%;
  transform:scaleX(var(--progress,0));transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--blue) 55%,var(--orange));
  transition:transform .12s linear;
}

/* ---------- 10. Footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(56px,8vw,120px);
  background:var(--ink-deep);
  border-top:1px solid var(--line);
  color:var(--text);
}
.site-footer::before{
  content:"";position:absolute;inset:auto -12% -46% -12%;height:78%;pointer-events:none;
  background:repeating-radial-gradient(circle at 34% 118%,rgba(40,240,194,.07) 0 1px,transparent 1px 44px);
}
.footer-signal{
  height:6px;
  background:repeating-linear-gradient(90deg,var(--cyan) 0 56px,var(--orange) 56px 112px,var(--line) 112px 280px);
  opacity:.85;
}
.footer-grid{
  position:relative;
  display:grid;grid-template-columns:1.6fr .85fr .85fr .85fr 1.35fr;
  gap:clamp(24px,3vw,48px);
  padding:clamp(40px,6vw,80px) 0 clamp(28px,4vw,48px);
}
.footer-brand .brand--footer{margin-bottom:18px}
.footer-brand .brand-mark{width:40px;height:40px;font-size:18px}
.footer-statement{
  max-width:34ch;font-size:14px;line-height:1.8;color:var(--muted);
  padding-left:14px;border-left:2px solid var(--line);
}
.footer-meta{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--silver);
}
.footer-title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:16px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.footer-title::before{content:"";display:block;width:12px;height:2px;background:var(--cyan)}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;
  font-size:14px;color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease,transform .18s ease;
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan);border-color:rgba(40,240,194,.5);transform:translateX(2px)}
.footer-contact-item{display:grid;gap:2px}
.footer-key{
  font-family:var(--font-mono);font-size:10px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:rgba(154,181,172,.75);
}
.footer-value{
  font-family:var(--font-mono);font-size:13px;line-height:1.6;color:var(--silver);
  overflow-wrap:anywhere;
}
.footer-note{
  margin-top:16px;padding-top:14px;
  font-size:12px;line-height:1.8;color:rgba(154,181,172,.85);
  border-top:1px dashed rgba(30,74,64,.9);
}
.footer-base{
  position:relative;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  padding:20px 0 32px;
  border-top:1px solid rgba(30,74,64,.85);
}
.footer-legal{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(154,181,172,.85);
}

/* ---------- 11. Reveal / To-top ---------- */
html.js-reveal [data-reveal]{opacity:0;transform:translateY(18px)}
[data-reveal]{transition:opacity .5s cubic-bezier(.2,.7,.3,1),transform .5s cubic-bezier(.2,.7,.3,1)}
[data-reveal].is-visible{opacity:1;transform:none}

.to-top{
  position:fixed;right:clamp(14px,3vw,32px);bottom:clamp(14px,3vw,32px);z-index:95;
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 16px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);background:var(--panel);
  border:1px solid var(--cyan);box-shadow:6px 6px 0 rgba(5,16,13,.7);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,background .2s,color .2s;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--cyan);color:#04120E}

/* ---------- 12. Focus ---------- */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.section--light :focus-visible{outline-color:#0A7F68}

/* ---------- 13. Responsive ---------- */
@media (max-width:1240px){
  .nav-link{padding:10px 8px;font-size:13px}
  .nav-actions .btn{font-size:12px;padding:10px 12px}
  .brand-name{font-size:18px}
}

@media (max-width:1100px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:8px var(--gutter) 22px;
    background:var(--ink-deep);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    box-shadow:0 26px 48px rgba(0,0,0,.55);
    max-height:calc(100vh - 96px);overflow-y:auto;
  }
  .primary-nav[data-open]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{
    justify-content:flex-start;gap:12px;
    padding:15px 12px;font-size:16px;font-weight:500;
    border-bottom:1px dashed rgba(30,74,64,.85);
  }
  .nav-link[aria-current="page"]{
    background:linear-gradient(90deg,rgba(40,240,194,.18),rgba(40,240,194,0));
    box-shadow:inset 3px 0 0 0 var(--cyan);
  }
  .nav-index{font-size:13px}
  .nav-actions{
    flex-direction:column;align-items:stretch;gap:10px;
    margin-top:18px;padding:18px 0 0;
    border-left:0;border-top:1px solid var(--line);
  }
  .nav-actions .btn{width:100%;padding:14px 18px;font-size:14px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
  .footer-statement{max-width:56ch}
}

@media (max-width:960px){
  .grid--split,.grid--reverse,.grid--thirds,.grid--halves{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  .header-rail{gap:12px;font-size:10px;letter-spacing:.1em}
  .rail-item--hide{display:none}
  .brand-mark{width:38px;height:38px;font-size:17px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:9px;letter-spacing:.2em}
  .nav-toggle{padding:9px 11px;font-size:10px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-base{flex-direction:column;align-items:flex-start}
  .to-top{padding:11px 13px;font-size:10px}
  .display-xl{font-size:clamp(2.2rem,10vw,3.2rem)}
}

/* ---------- 14. 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}
  .signal-dot{animation:none;box-shadow:0 0 0 3px rgba(40,240,194,.28)}
  html.js-reveal [data-reveal]{opacity:1;transform:none}
  .to-top{transform:none}
  .scroll-progress > span{transition:none}
}