/* ==========================================================================
   米乐赛场 · 共享样式表 /assets/site.css
   夜间体育数据实验室：深墨黑底 + 荧光青主调 + 品牌橙高亮 + 冰蓝数值
   ========================================================================== */

/* 1. Reset ---------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;}
html:focus-within{scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
img,picture,svg,video{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%;}
:where(a,button,summary,[tabindex]):focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px;}

/* 2. Design tokens -------------------------------------------------------- */
:root{
  --ink:#05070A;
  --panel:#0B1118;
  --panel-deep:#080C12;
  --line:#1B242E;
  --cyan:#25F0CE;
  --cyan-deep:#0C7A6B;
  --orange:#FF6A1A;
  --ice:#9FD8FF;
  --mist:#8C9AA8;
  --paper:#F3F7F9;
  --glass:rgba(255,255,255,.06);
  --glass-strong:rgba(255,255,255,.1);
  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --container:1240px;
  --gutter:clamp(18px,4vw,44px);
  --radius:3px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-offset:118px;
}

/* 3. Base typography ------------------------------------------------------ */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-cn);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.004em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(60% 45% at 84% -10%, rgba(37,240,206,.10), transparent 62%),
    radial-gradient(48% 40% at 2% 10%, rgba(159,216,255,.06), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.014) 0 1px, transparent 1px 84px);
}
#main-content{scroll-margin-top:var(--header-offset);}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.75;}
.display-title{font-weight:900;font-size:clamp(42px,7.4vw,104px);line-height:.98;letter-spacing:-.012em;}
.section-title{font-weight:900;font-size:clamp(28px,4vw,52px);line-height:1.1;letter-spacing:-.006em;}
.panel-title{font-weight:700;font-size:clamp(20px,2.2vw,26px);line-height:1.32;}
.lead{font-size:clamp(17px,2vw,20px);line-height:1.75;color:rgba(243,247,249,.88);max-width:44ch;}
.prose{max-width:44ch;color:rgba(243,247,249,.86);}
.section-body{color:rgba(243,247,249,.84);}
.prose p+p,.section-body p+p{margin-top:1.05em;}
.prose strong,.section-body strong{color:var(--paper);}
.prose a{border-bottom:1px solid var(--cyan-deep);color:var(--cyan);}

/* 4. Layout helpers ------------------------------------------------------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter);}
.section{position:relative;padding-block:clamp(40px,7vw,96px);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px 32px;margin-bottom:clamp(20px,3vw,36px);}
.section-head .section-title{max-width:22ch;}
.grid{display:grid;gap:clamp(16px,2.2vw,28px);}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-5-7{grid-template-columns:5fr 7fr;}
.grid-4-8{grid-template-columns:4fr 8fr;}
.grid-3-6-3{grid-template-columns:3fr 6fr 3fr;}
.divider{height:1px;border:0;background:linear-gradient(90deg,var(--line),transparent);margin-block:clamp(20px,3vw,36px);}

/* 5. Buttons / chips / tags ---------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1.2;cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn-primary{background:var(--orange);color:#160600;box-shadow:0 10px 26px -14px rgba(255,106,26,.9);}
.btn-primary:hover{background:#ff7f3c;transform:translateY(-1px);}
.btn-cyan{background:var(--cyan);color:#04211C;}
.btn-cyan:hover{background:#57f6dc;}
.btn-ghost{border-color:var(--line);color:var(--paper);background:transparent;}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.tool-chip{
  display:inline-flex;align-items:center;gap:6px;padding:6px 11px;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--glass);
  color:var(--mist);font-size:12.5px;line-height:1.3;white-space:nowrap;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.tool-chip:hover{color:var(--paper);border-color:var(--cyan);background:rgba(37,240,206,.08);}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:3px 9px;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--glass);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.tag--live{color:var(--orange);border-color:rgba(255,106,26,.42);background:rgba(255,106,26,.08);}

/* 6. Header --------------------------------------------------------------- */
.skip-link{
  position:absolute;left:var(--gutter);top:10px;z-index:120;
  padding:10px 16px;border-radius:var(--radius);
  background:var(--cyan);color:#04211C;font-size:14px;font-weight:700;
  transform:translateY(-220%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);}
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,10,.9);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.read-progress{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(255,255,255,.07);}
.read-progress-bar{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--ice) 55%,var(--orange));
  transition:transform .12s linear;
}
.header-bar{border-bottom:1px solid rgba(27,36,46,.85);background:linear-gradient(90deg,rgba(37,240,206,.07),rgba(5,7,10,0) 42%);}
.header-bar-inner{display:flex;align-items:center;justify-content:space-between;gap:12px 24px;min-height:34px;}
.header-bar-text{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--mist);letter-spacing:.04em;}
.header-bar-dot{width:6px;height:6px;background:var(--cyan);box-shadow:0 0 0 3px rgba(37,240,206,.16);animation:pulse 2.6s var(--ease) infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.header-meta{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;color:var(--ice);}
.header-meta-label{color:var(--mist);}
.header-main{
  position:relative;
  background:
    linear-gradient(90deg,rgba(37,240,206,.05),transparent 34%),
    linear-gradient(180deg,rgba(11,17,24,.78),rgba(5,7,10,.6));
}
.header-main-inner{display:flex;align-items:center;gap:clamp(14px,2.4vw,34px);min-height:78px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper);}
.brand-mark{
  display:grid;place-items:center;width:44px;height:44px;flex:0 0 auto;
  border:1px solid rgba(37,240,206,.42);
  background:linear-gradient(140deg,rgba(37,240,206,.2),rgba(11,17,24,.92));
  color:var(--cyan);font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand-text{display:block;min-width:0;}
.brand-name{display:block;font-size:19px;font-weight:900;line-height:1.25;letter-spacing:.02em;}
.brand-tagline{display:block;font-size:12px;line-height:1.5;color:var(--mist);}
.nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--glass);color:var(--paper);font-size:13.5px;font-weight:600;letter-spacing:.04em;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);}
.nav-toggle-bars{position:relative;display:block;width:16px;height:10px;border-top:2px solid var(--cyan);border-bottom:2px solid var(--cyan);}
.nav-toggle-bars::after{content:"";position:absolute;left:0;right:0;top:4px;height:2px;background:var(--cyan);transition:opacity .2s var(--ease);}
.site-header[data-open] .nav-toggle{border-color:var(--orange);background:rgba(255,106,26,.12);}
.site-header[data-open] .nav-toggle-bars,
.site-header[data-open] .nav-toggle-bars::after{border-color:var(--orange);background:var(--orange);opacity:.75;}
.primary-nav{display:flex;align-items:center;gap:clamp(12px,2vw,28px);margin-left:auto;flex:1 1 auto;min-width:0;}
.nav-list{display:flex;align-items:center;gap:clamp(2px,1vw,14px);}
.nav-item{display:block;}
.nav-link{
  position:relative;display:inline-block;padding:10px 2px;
  font-size:15px;font-weight:500;color:var(--mist);white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:100%;bottom:3px;height:2px;
  background:var(--cyan);transition:right .26s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--paper);}
.nav-link:hover::after,.nav-link:focus-visible::after{right:0;}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:700;}
.nav-link[aria-current="page"]::after{right:0;background:linear-gradient(90deg,var(--cyan),var(--orange));}
.nav-tools{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding-left:clamp(12px,2vw,26px);border-left:1px solid var(--line);
}
.nav-tools-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--mist);}

/* 7. Footer --------------------------------------------------------------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,104px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#070B10 0%,#05070A 62%);
}
.footer-seam{height:1px;background:linear-gradient(90deg,transparent,rgba(37,240,206,.6) 16%,rgba(159,216,255,.35) 54%,transparent);}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1.1fr) 2fr;
  gap:clamp(24px,4vw,60px);
  padding:clamp(38px,6vw,72px) 0 clamp(26px,4vw,44px);
}
.footer-brand{min-width:0;}
.brand-footer .brand-mark{width:38px;height:38px;font-size:13px;}
.footer-signature{margin-top:18px;font-size:20px;font-weight:900;letter-spacing:.02em;}
.footer-line{margin-top:6px;font-size:14px;color:var(--mist);max-width:34ch;}
.footer-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.footer-strip-item{
  padding:4px 9px;border:1px solid var(--line);border-radius:var(--radius);background:var(--glass);
  font-family:var(--font-mono);font-size:12px;color:var(--ice);
}
.footer-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,36px);}
.footer-col-title{
  position:relative;margin-bottom:14px;padding-left:12px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.16em;color:var(--mist);
}
.footer-col-title::before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;background:var(--cyan);}
.footer-links{display:grid;gap:10px;}
.footer-links a{
  display:inline-block;font-size:14.5px;color:rgba(243,247,249,.86);
  border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-links a:hover{color:var(--cyan);border-color:var(--cyan);}
.footer-contact{
  display:grid;grid-template-columns:minmax(0,1.9fr) minmax(0,1fr);
  gap:clamp(18px,3vw,40px);
  padding:clamp(20px,3vw,32px) 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.contact-list{display:grid;grid-template-columns:1fr .8fr 1.5fr;gap:clamp(16px,2.4vw,32px);}
.contact-item{min-width:0;}
.contact-item dt{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--mist);margin-bottom:6px;}
.contact-item dd{margin:0;font-size:14px;color:var(--paper);overflow-wrap:anywhere;}
.contact-note{margin:0;padding:14px 16px;border-left:2px solid var(--cyan);background:linear-gradient(90deg,rgba(37,240,206,.08),transparent);font-size:13.5px;line-height:1.8;color:var(--mist);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 28px;
  padding:20px 0 clamp(26px,4vw,38px);
}
.footer-copy{margin:0;font-size:12.5px;color:var(--mist);}
.footer-legal{margin:0;font-size:12.5px;color:var(--mist);}
.footer-legal .mono{color:var(--ice);}

/* 8. Shared components ---------------------------------------------------- */
.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(11,17,24,.94),rgba(8,12,18,.94));
  box-shadow:0 30px 70px -46px rgba(0,0,0,.95);
  transition:border-color .25s var(--ease);
}
.panel::before{content:"";position:absolute;left:0;top:0;width:52px;height:2px;background:var(--cyan);}
.panel:hover{border-color:rgba(37,240,206,.45);}
.panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px;}
.glass-card{
  padding:clamp(16px,2.2vw,24px);
  border:1px solid rgba(255,255,255,.09);border-radius:var(--radius);
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
}
.aside-note{
  padding:14px 0 14px 16px;
  border-left:2px solid var(--cyan);
  background:linear-gradient(90deg,rgba(37,240,206,.07),transparent);
  font-size:13.5px;line-height:1.8;color:var(--mist);
}
.aside-note-title{display:block;margin-bottom:6px;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--paper);}
.metric{
  display:flex;flex-direction:column;gap:4px;
  padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(11,17,24,.72);
  transition:border-color .25s var(--ease);
}
.metric:hover{border-color:rgba(37,240,206,.45);}
.metric-label{font-size:12.5px;letter-spacing:.08em;color:var(--mist);}
.metric-value{display:flex;align-items:baseline;gap:6px;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.06;color:var(--ice);}
.metric-unit{font-family:var(--font-cn);font-size:13px;color:var(--mist);}
.metric--accent .metric-value{color:var(--cyan);}
.data-table{width:100%;font-size:14.5px;border:1px solid var(--line);background:rgba(11,17,24,.6);}
.data-table caption{padding:12px 14px;text-align:left;font-size:13px;color:var(--mist);}
.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);}
.data-table thead th{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--mist);background:rgba(255,255,255,.03);}
.data-table tbody tr:hover{background:rgba(37,240,206,.05);}
.data-table tbody tr:last-child td{border-bottom:0;}
.data-table .num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--ice);text-align:right;}
.media-frame{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(150deg,#0B1118,#05070A);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 42%,rgba(5,7,10,.74)),
             linear-gradient(90deg,rgba(37,240,206,.06),transparent 46%);
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.55) contrast(1.08) brightness(.92);}
.media-frame figcaption{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:12px 14px;font-size:12.5px;color:var(--mist);}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--fill{aspect-ratio:auto;}
.breadcrumb{margin-block:22px 10px;}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;color:var(--mist);}
.breadcrumb-item{display:flex;align-items:center;}
.breadcrumb-item+.breadcrumb-item::before{content:"/";margin-inline-end:8px;color:var(--cyan-deep);}
.breadcrumb-item a{color:var(--mist);transition:color .2s var(--ease);}
.breadcrumb-item a:hover{color:var(--cyan);}
.breadcrumb-item[aria-current="page"]{color:var(--paper);}
.cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);}
.cut-tl{clip-path:polygon(18px 0,100% 0,100% 100%,0 100%,0 18px);}

/* 9. Motion --------------------------------------------------------------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .55s var(--ease),transform .55s var(--ease);}
[data-reveal].is-visible{opacity:1;transform:none;}
[data-section]{scroll-margin-top:var(--header-offset);}
[data-section][data-active="true"] .panel::before,
[data-section][data-active="true"] .section-title{color:var(--cyan);}
[data-section-link]{color:var(--mist);transition:color .2s var(--ease),border-color .2s var(--ease);}
[data-section-link][aria-current="true"]{color:var(--cyan);border-color:var(--cyan);}

/* 10. Responsive ---------------------------------------------------------- */
@media (max-width:1280px){
  .nav-tools-label{display:none;}
}
@media (max-width:1240px){
  .brand-tagline{display:none;}
}
@media (max-width:1120px){
  .nav-toggle{display:inline-flex;}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:14px;
    max-height:calc(100vh - var(--header-offset));overflow-y:auto;
    padding:10px var(--gutter) 22px;margin-left:0;
    border-bottom:1px solid var(--line);
    background:linear-gradient(180deg,rgba(8,12,18,.99),rgba(5,7,10,.99));
    box-shadow:0 30px 60px -30px rgba(0,0,0,.95);
  }
  .site-header[data-open] .primary-nav{display:flex;}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .nav-link{display:block;padding:14px 4px;border-bottom:1px solid rgba(27,36,46,.8);font-size:16px;}
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--cyan);box-shadow:inset 2px 0 0 var(--cyan);padding-left:12px;}
  .nav-tools{padding-left:0;border-left:0;padding-top:6px;}
  .nav-tools .btn-primary{width:100%;}
  .header-main-inner{min-height:68px;}
}
@media (max-width:960px){
  .grid-5-7,.grid-4-8,.grid-3-6-3{grid-template-columns:1fr;}
  .grid-2,.grid-3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));}
  .footer-top{grid-template-columns:1fr;}
  .footer-contact{grid-template-columns:1fr;}
  .contact-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .contact-item:last-child{grid-column:1 / -1;}
}
@media (max-width:640px){
  body{font-size:15.5px;line-height:1.78;}
  .header-bar-text{font-size:11.5px;}
  .header-meta-label{display:none;}
  .footer-index{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .contact-list{grid-template-columns:1fr;}
  .contact-item:last-child{grid-column:auto;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .nav-tools{gap:6px;}
  .tool-chip{font-size:12px;padding:5px 9px;}
}

/* 11. Accessibility ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html:focus-within{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  [data-reveal]{opacity:1;transform:none;}
  .read-progress-bar{transition:none;}
}