/* =========================================================
   米乐看台 — 共享站点套件 /assets/site.css
   夜间看台 × 数据机房：深墨绿底、荧光青强调、暖橙刻度
   ========================================================= */

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

/* ---------- 2. TOKENS ---------- */
:root{
  --pitch-950:#041A16;
  --pitch-800:#0A2E27;
  --pitch-600:#145245;
  --cyan-400:#3BF0CE;
  --cyan-200:#A9FBE9;
  --amber-500:#FF8A3D;
  --amber-300:#FFC08A;
  --paper-50:#F5F8F4;
  --paper-200:#DCE5DF;
  --slate-600:#5C6D67;

  --rail-w:232px;
  --maxw:1240px;
  --gutter:clamp(18px,4vw,56px);
  --gap:24px;

  --line:1px solid rgba(220,229,223,.16);
  --line-strong:1px solid rgba(220,229,223,.34);
  --line-light:1px solid rgba(220,229,223,.28);

  --font-sans:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}

/* ---------- 3. BASE ---------- */
body{
  min-height:100vh;
  color:var(--paper-50);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  font-weight:400;
  background-color:var(--pitch-950);
  background-image:
    radial-gradient(1100px 520px at 88% -8%, rgba(59,240,206,.11), transparent 62%),
    radial-gradient(820px 460px at 4% 44%, rgba(20,82,69,.62), transparent 72%);
  background-repeat:no-repeat;
}
::selection{background:var(--cyan-400);color:var(--pitch-950)}
:focus-visible{outline:2px solid var(--amber-500);outline-offset:2px}
h1,h2,h3,h4{font-weight:800;line-height:1.22;letter-spacing:-.01em}

/* ---------- 4. 排版助手 ---------- */
.display{
  font-size:clamp(40px,7.2vw,96px);
  font-weight:900;
  line-height:.98;
  letter-spacing:-.03em;
  text-transform:uppercase;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:.02em;
}
.eyebrow{
  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-400);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
.annot{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12px;
  font-weight:500;
  letter-spacing:.34em;
  color:var(--slate-600);
}
.prose{max-width:44em}
.prose p+p{margin-top:1.1em}
.prose strong{color:var(--cyan-200)}

/* ---------- 5. 布局助手 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.band{padding-block:clamp(44px,6vw,88px)}
.band--panel{background:var(--pitch-800);border-block:var(--line)}
.band--paper{background:var(--paper-50);color:var(--pitch-800)}
.band--paper .section__note,
.band--paper .annot{color:var(--slate-600)}
.section{padding-block:clamp(44px,6vw,88px);border-top:var(--line)}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:12px 20px;
  margin-bottom:clamp(24px,3vw,40px);
}
.section__title{font-size:clamp(24px,3vw,36px);letter-spacing:-.02em}
.section__note{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate-600);
  margin-left:auto;
}
.rule{height:1px;background:rgba(220,229,223,.2);border:0;margin-block:var(--gap)}
.band--paper .rule{background:var(--paper-200)}
.grid{display:grid;gap:var(--gap);grid-template-columns:repeat(12,minmax(0,1fr))}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-6{grid-column:span 6}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 6. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 20px;
  border:1px solid rgba(220,229,223,.34);
  border-radius:0;
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.2;
  color:var(--paper-50);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--cyan-400);border-color:var(--cyan-400);color:var(--pitch-950)}
.btn--primary:hover{background:var(--cyan-200);border-color:var(--cyan-200)}
.btn--ghost{border-color:rgba(59,240,206,.6);color:var(--cyan-400);background:rgba(59,240,206,.06)}
.btn--ghost:hover{background:rgba(59,240,206,.16);border-color:var(--cyan-200);color:var(--cyan-200)}
.btn--quiet{border-color:rgba(220,229,223,.24);color:var(--paper-200)}
.btn--quiet:hover{border-color:var(--amber-500);color:var(--amber-300)}

.tag{
  display:inline-block;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  border:1px solid rgba(220,229,223,.26);
  color:var(--paper-200);
}
.tag--cyan{background:var(--cyan-200);border-color:transparent;color:var(--pitch-800)}
.tag--amber{border-color:var(--amber-500);color:var(--amber-300)}

.panel{
  background:var(--pitch-800);
  border:var(--line);
  padding:clamp(18px,2.4vw,28px);
}
.panel--paper{background:var(--paper-50);border-color:var(--paper-200);color:var(--pitch-800)}
.panel--accent{border:3px solid var(--cyan-400)}
.panel--amber{border:3px solid var(--amber-500)}

.score-card{
  display:grid;
  gap:10px;
  padding:20px 22px;
  background:var(--pitch-800);
  border:var(--line);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.score-card:hover{border-color:var(--cyan-400)}
.score-card__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,4vw,46px);
  line-height:1;
  color:var(--amber-500);
}
.score-card:hover .score-card__num{animation:score-pulse 200ms var(--ease)}
.score-card__meta{font-size:13px;color:var(--slate-600)}
@keyframes score-pulse{
  0%{filter:brightness(1)}
  50%{filter:brightness(1.45)}
  100%{filter:brightness(1)}
}

.metric{border-top:1px solid rgba(220,229,223,.22);padding-top:14px}
.band--paper .metric{border-top-color:var(--paper-200)}
.metric__num{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,4vw,42px);
  line-height:1.05;
  color:var(--cyan-400);
}
.band--paper .metric__num{color:var(--pitch-600)}
.metric__label{display:block;margin-top:6px;font-size:12px;letter-spacing:.08em;color:var(--slate-600)}

.data-table{font-size:14px}
.data-table th,
.data-table td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--paper-200);vertical-align:top}
.data-table thead th{
  background:var(--pitch-600);
  color:var(--paper-50);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.1em;
  border-bottom:0;
}
.data-table tbody tr:hover td{background:rgba(59,240,206,.08)}

.expandable{
  background:rgba(10,46,39,.55);
  border:var(--line);
  border-left:3px solid transparent;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.expandable+.expandable{margin-top:12px}
.expandable[open]{border-left-color:var(--cyan-400);background:rgba(10,46,39,.9)}
.expandable__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  font-size:16px;
  font-weight:700;
}
.expandable__head::after{content:"+";font-family:var(--font-mono);color:var(--cyan-400)}
.expandable[open] .expandable__head::after{content:"–";color:var(--amber-500)}
.expandable__body{padding:0 20px 20px;font-size:15px;line-height:1.75;color:rgba(245,248,244,.78)}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--slate-600);
}
.breadcrumbs__item a{transition:color var(--dur) var(--ease)}
.breadcrumbs__item a:hover{color:var(--cyan-400)}
.breadcrumbs__item[aria-current="page"]{color:var(--paper-200)}
.breadcrumbs__sep{color:rgba(92,109,103,.7)}

.media{border:var(--line);background:var(--pitch-800);overflow:hidden}
.media__frame{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background-color:var(--pitch-600);
  background-image:
    linear-gradient(rgba(4,26,22,.6),rgba(4,26,22,.6)),
    repeating-linear-gradient(0deg,rgba(169,251,233,.14) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(169,251,233,.14) 0 1px,transparent 1px 28px);
}
.media__frame--wide{aspect-ratio:21/9}
.media__frame--tall{aspect-ratio:4/5}
.media__img{width:100%;height:100%;object-fit:cover}
.media__caption{
  padding:10px 14px;
  border-top:var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--slate-600);
}

.texture-pixels{position:relative}
.texture-pixels::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.12;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:4px 4px;
}

/* ---------- 7. 页头 ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-70px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan-400);
  color:var(--pitch-950);
  font-size:14px;
  font-weight:700;
  transition:top 160ms var(--ease);
}
.skip-link:focus{top:12px}

.site-header{position:relative;z-index:60}

/* 品牌轨道 */
.brand-track{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:14px var(--gutter);
  background:var(--pitch-800);
  border-bottom:var(--line);
}
.brand-mark{display:inline-flex;align-items:center;gap:12px}
.brand-mark__glyph{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  background:var(--cyan-400);
  color:var(--pitch-950);
  font-size:18px;
  font-weight:900;
  line-height:1;
}
.brand-mark__text{display:flex;flex-direction:column;line-height:1.15}
.brand-mark__name{font-size:17px;font-weight:800;letter-spacing:.08em}
.brand-mark__latin{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.brand-track__tagline{display:none}
.brand-track__meta{display:none;gap:18px}
.brand-track__meta-item{display:flex;align-items:baseline;gap:8px}
.brand-track__meta dt{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--slate-600);
}
.brand-track__meta dd{font-size:13px;color:var(--paper-200)}
.brand-track__cta{margin-left:auto;padding:9px 13px;font-size:12px}
.brand-track__rule,
.brand-track__note{display:none}

/* 顶栏与导航 */
.header-bar{
  position:sticky;
  top:0;
  z-index:55;
  background:rgba(4,26,22,.94);
  backdrop-filter:blur(10px);
  border-bottom:var(--line);
}
.header-bar__row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
  padding:12px var(--gutter);
}
.header-bar__label{
  display:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--slate-600);
  text-transform:uppercase;
}
.header-bar__label .num{color:var(--cyan-400)}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
  padding:10px 14px;
  border:1px solid rgba(59,240,206,.55);
  color:var(--cyan-400);
  font-size:13px;
  letter-spacing:.1em;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"]{
  background:var(--cyan-400);
  border-color:var(--cyan-400);
  color:var(--pitch-950);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4px) rotate(-45deg)}

.site-nav{display:none;flex-basis:100%;border-top:var(--line);margin-top:4px}
.site-nav[data-open]{display:block}
.site-nav__list{display:flex;flex-direction:column}
.site-nav__item{width:100%}
.site-nav__link{
  position:relative;
  display:block;
  padding:14px 2px;
  border-bottom:var(--line);
  font-size:15px;
  color:rgba(245,248,244,.84);
  transition:color var(--dur) var(--ease);
}
.site-nav__link:hover{color:var(--cyan-400)}
.site-nav__link[aria-current="page"]{color:var(--cyan-400)}

/* 时间轴带 */
.timeline-band{
  border-top:var(--line);
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:thin;
  scrollbar-color:var(--pitch-600) transparent;
}
.timeline-band::-webkit-scrollbar{height:6px}
.timeline-band::-webkit-scrollbar-thumb{background:var(--pitch-600)}
.timeline-band::-webkit-scrollbar-track{background:transparent}
.timeline-band__track{display:flex;min-width:max-content;padding-inline:var(--gutter)}
.timeline-band__tick{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 24px 11px 0;
  border-right:var(--line);
  white-space:nowrap;
}
.timeline-band__tick+.timeline-band__tick{padding-left:24px}
.timeline-band__mark{
  width:6px;
  height:6px;
  background:var(--pitch-600);
  transform:translateY(-2px);
  transition:background-color var(--dur) var(--ease);
}
.timeline-band__num{
  font-size:12px;
  color:var(--slate-600);
  transition:color var(--dur) var(--ease);
}
.timeline-band__label{font-size:12px;color:var(--slate-600);transition:color var(--dur) var(--ease)}
.timeline-band__tick.is-lit .timeline-band__mark{background:var(--cyan-400)}
.timeline-band__tick.is-lit .timeline-band__num{color:var(--amber-500)}
.timeline-band__tick.is-lit .timeline-band__label{color:var(--paper-200)}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan-400),var(--amber-500));
  pointer-events:none;
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  border-top:var(--line-strong);
  background-image:linear-gradient(180deg,var(--pitch-950),var(--pitch-800) 140%);
}
.site-footer::before{
  content:"";
  display:block;
  height:6px;
  background-image:repeating-linear-gradient(90deg,var(--cyan-400) 0 2px,transparent 2px 14px);
  opacity:.4;
}
.footer-inner{
  display:grid;
  gap:clamp(28px,4vw,48px);
  grid-template-columns:1fr;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) var(--gutter) clamp(24px,3vw,40px);
}
.footer-brand{display:flex;flex-direction:column;gap:16px;max-width:34em}
.footer-brand__summary{font-size:14px;line-height:1.75;color:rgba(245,248,244,.72)}
.footer-brand__version{font-size:12px;letter-spacing:.06em;color:var(--slate-600)}
.footer-nav{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}
.footer-col{min-width:0}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan-400);
  margin-bottom:14px;
}
.footer-col__list li+li{margin-top:10px}
.footer-col__list a{
  font-size:14px;
  color:rgba(245,248,244,.76);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col__list a:hover{color:var(--cyan-200);border-bottom-color:var(--cyan-200)}
.footer-contact__list{display:grid;gap:12px}
.footer-contact__item{display:grid;gap:4px}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  color:var(--slate-600);
}
.footer-contact__value{font-size:13px;line-height:1.6;color:rgba(245,248,244,.82)}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:8px 28px;
  align-items:center;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:16px var(--gutter) 28px;
  border-top:var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--slate-600);
}
.footer-legal__copy{margin-left:auto}
.footer-legal__note{flex-basis:100%;font-size:11px;letter-spacing:.04em}

/* ---------- 9. 动效与可见性 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 10. 响应式 ---------- */
@media (min-width:640px) and (max-width:1023px){
  .brand-track__meta{display:flex}
}
@media (max-width:899px){
  .col-3,.col-4,.col-6,.col-8{grid-column:1/-1}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .brand-track{
    position:fixed;
    inset:0 auto 0 0;
    width:var(--rail-w);
    flex-direction:column;
    flex-wrap:nowrap;
    align-items:flex-start;
    gap:0;
    padding:28px 22px 24px;
    border-bottom:0;
    border-right:var(--line);
    background-image:linear-gradient(180deg,var(--pitch-800),var(--pitch-950) 72%);
    z-index:70;
    overflow-y:auto;
  }
  .brand-track__tagline{
    display:block;
    margin-top:18px;
    font-size:13px;
    line-height:1.75;
    color:rgba(169,251,233,.66);
  }
  .brand-track__meta{
    display:flex;
    flex-direction:column;
    gap:12px;
    width:100%;
    margin-top:22px;
    padding-top:18px;
    border-top:var(--line);
  }
  .brand-track__meta-item{justify-content:space-between;width:100%}
  .brand-track__cta{width:100%;margin:20px 0 0;padding:11px 14px;font-size:13px}
  .brand-track__rule{display:block;width:100%;height:1px;background:rgba(220,229,223,.14);margin-top:auto}
  .brand-track__note{
    display:block;
    margin-top:14px;
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.16em;
    color:var(--slate-600);
  }
  .header-bar__label{display:block}
  .nav-toggle{display:none}
  .site-nav{display:block;flex-basis:auto;margin:0 0 0 auto;border-top:0}
  .site-nav__list{flex-direction:row;align-items:center;gap:2px}
  .site-nav__item{width:auto}
  .site-nav__link{padding:10px 16px;border-bottom:0;font-size:14px;letter-spacing:.02em}
  .site-nav__link::after{
    content:"";
    position:absolute;
    left:16px;
    right:16px;
    bottom:2px;
    height:2px;
    background:var(--cyan-400);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease);
  }
  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after{transform:scaleX(1)}
  .site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--amber-500)}
  .timeline-band__tick{transition:opacity var(--dur) var(--ease)}
  .footer-inner{grid-template-columns:minmax(220px,1.1fr) minmax(0,2fr) minmax(230px,1fr)}
  .footer-legal__note{flex-basis:auto}
}
@media (min-width:1280px){
  :root{--rail-w:248px}
}

/* ---------- 11. 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;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .site-nav__link::after{transition:none}
  .scroll-progress{transition:none}
}