/* ============================================================
   /assets/site.css — 乐鱼体育站 共享外壳与基础组件
   深海蓝单色体系 / 锐利直角 / 精密网格 / 荧光青与活力橙
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --ink-950:#050B14;
  --ink-850:#0A1524;
  --ink-750:#10203A;
  --ink-650:#1B3352;
  --line-500:#2C4A6E;
  --cyan-400:#2FE6D0;
  --cyan-200:#9BF6EC;
  --orange-500:#FF7A2F;
  --red-600:#B3243C;
  --paper-050:#E8F1F8;
  --muted-450:#8AA3BC;
  --grid-overlay:rgba(47,230,208,.10);

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

  --shell:1320px;
  --pad:64px;
  --ease:cubic-bezier(.22,1,.36,1);
  --z-header:60;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
summary{cursor:pointer;list-style:none}
summary::-webkit-details-marker{display:none}
hr{border:0;border-top:1px solid var(--line-500);margin:0}

/* ---------- 3. Base ---------- */
body{
  background-color:var(--ink-950);
  color:var(--paper-050);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.55;
  background-image:
    linear-gradient(var(--grid-overlay) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-overlay) 1px,transparent 1px);
  background-size:64px 64px;
}
main,.site-main{position:relative;z-index:1}
header,footer{position:relative;z-index:1}

a{color:var(--cyan-200);text-decoration:none;transition:color 160ms ease}
a:hover{color:var(--cyan-400)}
:focus-visible{outline:2px solid var(--cyan-400);outline-offset:2px}
#main-content{scroll-margin-top:130px}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.15;letter-spacing:-.02em}
strong{font-weight:700}

.num,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.muted{color:var(--muted-450)}

/* ---------- 4. Layout ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}
.section{padding:96px 0;position:relative}
.section--tight{padding:56px 0}
.section--flush{padding:0 0 96px}
.section__head{max-width:64ch;margin-bottom:40px}
.section__head--split{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;max-width:none;flex-wrap:wrap}

.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}

.rule{height:1px;background:var(--line-500);border:0;margin:0}
.stack>*+*{margin-top:16px}
.stack--lg>*+*{margin-top:32px}

/* ---------- 5. Typography ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(34px,5.6vw,72px);
  line-height:1.04;
  letter-spacing:-.02em;
}
.h2{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.15;
}
.h3{
  font-size:clamp(19px,2vw,22px);
  font-weight:700;
  letter-spacing:-.01em;
  padding-left:14px;
  position:relative;
}
.h3::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:2px;height:.92em;
  background:var(--cyan-400);
}
.lede{
  font-size:clamp(16px,1.4vw,18px);
  line-height:1.75;
  color:var(--muted-450);
  max-width:62ch;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:var(--cyan-200);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan-400)}
.eyebrow--v{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.32em;
  padding:6px 0;
}
.eyebrow--v::before{width:1px;height:22px}
.small{font-size:13px;line-height:1.6;color:var(--muted-450)}
.note{
  font-size:13px;
  line-height:1.7;
  color:var(--muted-450);
  border-left:1px solid var(--line-500);
  padding:10px 0 10px 14px;
}
.keyword{color:var(--cyan-400)}
.value-key{color:var(--red-600)}

/* ---------- 6. Actions ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  height:46px;
  padding:0 22px;
  border:1px solid var(--line-500);
  background:transparent;
  color:var(--paper-050);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  transition:border-color 160ms ease,color 160ms ease,background-color 160ms ease,transform 160ms ease;
}
.btn:hover{border-color:var(--cyan-400);color:var(--cyan-400);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--solid{background:var(--cyan-400);border-color:var(--cyan-400);color:var(--ink-950)}
.btn--solid:hover{background:var(--cyan-200);border-color:var(--cyan-200);color:var(--ink-950)}
.btn--accent{background:var(--orange-500);border-color:var(--orange-500);color:var(--ink-950)}
.btn--accent:hover{background:#ff8f4d;border-color:#ff8f4d;color:var(--ink-950)}
.btn--ghost{border-color:var(--ink-650);color:var(--muted-450)}
.btn--ghost:hover{color:var(--cyan-400);border-color:var(--cyan-400)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- 7. Surfaces ---------- */
.card{
  background:var(--ink-750);
  border:1px solid var(--line-500);
  padding:24px;
  transition:border-color 160ms ease,transform 160ms ease,background-color 160ms ease;
}
.card:hover{border-color:var(--cyan-400);transform:translateY(-2px)}
.card--flat:hover{transform:none}
.card--rail{position:relative;padding-left:40px}
.card--rail::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--ink-650);
  transition:background-color 220ms ease;
}
.card--rail:hover::before{background:var(--cyan-400)}
.panel{background:var(--ink-850);border:1px solid var(--line-500)}
.panel__head{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px 20px;border-bottom:1px solid var(--line-500);
  background:var(--ink-650);
}
.panel__title{font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--paper-050)}
.panel__body{padding:24px}

.tag{
  display:inline-flex;align-items:center;
  height:24px;padding:0 9px;
  border:1px solid var(--line-500);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.08em;
  color:var(--muted-450);
}
.tag--live{border-color:var(--cyan-400);color:var(--cyan-400)}
.tag--warn{border-color:var(--red-600);color:#e0607a}
.tag--step{border-color:var(--orange-500);color:var(--orange-500)}

.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  height:36px;padding:0 16px;
  border:1px solid var(--line-500);
  color:var(--muted-450);
  font-size:14px;
  transition:border-color 160ms ease,color 160ms ease,background-color 160ms ease;
}
.chip:hover{border-color:var(--cyan-400);color:var(--cyan-200)}
.chip[aria-pressed="true"]{border-color:var(--cyan-400);background:rgba(47,230,208,.10);color:var(--cyan-400)}

/* ---------- 8. Data pieces ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line-500);border:1px solid var(--line-500)}
.stat{background:var(--ink-850);padding:18px 20px}
.stat__value{display:block;font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);font-weight:600;letter-spacing:.02em;color:var(--paper-050);line-height:1.2}
.stat__value--accent{color:var(--cyan-400)}
.stat__value--alert{color:var(--red-600)}
.stat__value--warm{color:var(--orange-500)}
.stat__label{display:block;margin-top:6px;font-size:12px;letter-spacing:.14em;color:var(--muted-450)}

.bar{height:8px;background:var(--ink-650);border:1px solid var(--line-500);position:relative;overflow:hidden}
.bar__fill{
  display:block;height:100%;
  background:var(--cyan-400);
  transform:scaleX(var(--v,.5));
  transform-origin:left center;
  transition:transform 420ms var(--ease);
}
.bar__fill--warm{background:var(--orange-500)}
.bar__fill--alert{background:var(--red-600)}

.steps{counter-reset:step;display:grid;gap:1px;background:var(--line-500);border:1px solid var(--line-500)}
.step{background:var(--ink-850);padding:20px 22px 22px;position:relative}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--orange-500);margin-bottom:10px;
}

.data-table{font-size:14px}
.data-table caption{text-align:left;font-size:12px;letter-spacing:.18em;color:var(--muted-450);padding-bottom:12px}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--ink-650);text-align:left}
.data-table thead th{background:var(--ink-650);color:var(--cyan-200);font-size:12px;letter-spacing:.14em;font-weight:700}
.data-table td.num{color:var(--paper-050)}
.data-table tbody tr{transition:background-color 160ms ease}
.data-table tbody tr:hover{background:rgba(47,230,208,.06)}

.details{border:1px solid var(--line-500);background:var(--ink-850);transition:border-color 160ms ease}
.details+.details{margin-top:-1px}
.details:hover{border-color:var(--line-500)}
.details[open]{border-color:var(--cyan-400)}
.details__summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px 20px;font-weight:700;font-size:15px;
}
.details__summary::after{
  content:"+";font-family:var(--font-mono);font-size:16px;color:var(--orange-500);
  transition:transform 220ms var(--ease);
}
.details[open] .details__summary::after{content:"–"}
.details__body{padding:0 20px 20px;color:var(--muted-450);font-size:15px}

/* ---------- 9. Figures ---------- */
.figure{position:relative;border:1px solid var(--line-500);background:var(--ink-750);overflow:hidden}
.figure__img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.figure:hover .figure__img{transform:scale(1.02)}
.figure__ph{
  position:absolute;inset:0;display:flex;align-items:flex-end;padding:14px;
  background-image:
    linear-gradient(var(--grid-overlay) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-overlay) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--cyan-200);font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
}
.figure__cap{
  position:absolute;left:0;bottom:0;right:0;
  padding:10px 14px;
  background:linear-gradient(180deg,rgba(5,11,20,0),rgba(5,11,20,.92));
  font-size:12px;color:var(--muted-450);
}
.figure--21x9{aspect-ratio:21/9}
.figure--16x9{aspect-ratio:16/9}
.figure--4x3{aspect-ratio:4/3}
.figure--1x1{aspect-ratio:1/1}
.figure--3x4{aspect-ratio:3/4}
.figure--plain{background:var(--ink-850)}

/* ---------- 10. Breadcrumb ---------- */
.breadcrumb{padding:20px 0 0}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;letter-spacing:.1em;color:var(--muted-450)}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item+.breadcrumb__item::before{content:"/";color:var(--line-500)}
.breadcrumb__link{color:var(--muted-450)}
.breadcrumb__link:hover{color:var(--cyan-400)}
.breadcrumb__current{color:var(--cyan-200)}

/* ---------- 11. Header ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 16px;
  background:var(--cyan-400);color:var(--ink-950);
  font-size:14px;font-weight:700;
  transform:translateY(-200%);
  transition:transform 160ms var(--ease);
}
.skip-link:focus{transform:translateY(0);color:var(--ink-950)}

.site-header{
  position:sticky;top:0;z-index:var(--z-header);
  background:var(--ink-950);
  border-bottom:1px solid var(--line-500);
}
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:linear-gradient(90deg,var(--cyan-400),var(--orange-500));
  transform:scaleX(0);transform-origin:left center;
  pointer-events:none;
}

/* 上层状态带 */
.rail{background:var(--ink-850);border-bottom:1px solid var(--ink-650)}
.rail__inner{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:34px;
  font-size:11px;letter-spacing:.16em;color:var(--muted-450);
}
.rail__tag{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rail__num{color:var(--cyan-400)}
.rail__meta{display:flex;align-items:center;gap:26px;white-space:nowrap}
.rail__item{display:flex;align-items:center;gap:8px}
.live-dot{width:6px;height:6px;background:var(--cyan-400);animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* 下层主导航 */
.bar{background:var(--ink-950)}
.bar__inner{display:flex;align-items:center;gap:32px;min-height:66px}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--paper-050)}
.brand:hover{color:var(--paper-050)}
.brand__mark{
  display:grid;place-items:center;width:30px;height:30px;
  border:1px solid var(--cyan-400);color:var(--cyan-400);
  font-size:11px;letter-spacing:.06em;
  transition:background-color 160ms ease,color 160ms ease;
}
.brand:hover .brand__mark{background:var(--cyan-400);color:var(--ink-950)}
.brand__text{font-family:var(--font-display);font-size:18px;font-weight:900;letter-spacing:.01em}

.nav{margin-left:auto}
.nav__list{display:flex;align-items:stretch;gap:2px}
.nav__link{
  display:flex;align-items:center;gap:8px;
  height:66px;padding:0 12px;
  font-size:15px;color:var(--muted-450);
  border-bottom:2px solid transparent;
  transition:color 160ms ease,border-color 160ms ease,background-color 160ms ease;
}
.nav__link:hover{color:var(--paper-050);border-bottom-color:var(--line-500);background:rgba(47,230,208,.05)}
.nav__link[aria-current="page"]{color:var(--paper-050);border-bottom-color:var(--cyan-400)}
.nav__link[aria-current="page"] .nav__idx{color:var(--cyan-400);opacity:1}
.nav__idx{font-size:10px;color:var(--cyan-200);opacity:.45;letter-spacing:.08em}
.nav__label{white-space:nowrap}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:10px 14px;border:1px solid var(--line-500);
  font-size:13px;letter-spacing:.08em;color:var(--paper-050);
  transition:border-color 160ms ease,color 160ms ease,background-color 160ms ease;
}
.nav-toggle:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:1px;background:currentColor;transition:transform 160ms ease,opacity 160ms ease}
.nav-toggle__label{font-size:12px;letter-spacing:.18em}

.nav-scrim{
  position:fixed;inset:0;z-index:70;
  background:rgba(5,11,20,.74);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity 220ms ease,visibility 220ms ease;
}
.site-header[data-open="true"] .nav-scrim{opacity:1;visibility:visible;pointer-events:auto}

/* 移动端底部快捷入口 */
.quickbar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:65;
  background:var(--ink-850);
  border-top:1px solid var(--line-500);
}
.quickbar__link{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  padding:9px 4px;font-size:12px;color:var(--muted-450);
  border-top:2px solid transparent;
  transition:color 160ms ease,border-color 160ms ease,background-color 160ms ease;
}
.quickbar__link:hover{color:var(--cyan-400);border-top-color:var(--cyan-400);background:rgba(47,230,208,.06)}
.quickbar__link[aria-current="page"]{color:var(--cyan-400);border-top-color:var(--cyan-400)}
.quickbar__idx{font-size:10px;color:var(--cyan-200);opacity:.6}

/* ---------- 12. Footer ---------- */
.site-footer{
  background:var(--ink-950);
  border-top:1px solid var(--line-500);
  padding-top:72px;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:56px;
}
.footer__brand{font-family:var(--font-display);font-size:22px;font-weight:900;letter-spacing:-.01em}
.footer__desc{margin-top:12px;max-width:36ch;font-size:14px;line-height:1.7;color:var(--muted-450)}
.footer__icp{
  margin-top:18px;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--muted-450);border-left:1px solid var(--line-500);padding-left:10px;
}
.footer__title{margin-bottom:16px;font-size:12px;font-weight:700;letter-spacing:.24em;color:var(--cyan-200)}
.footer__links li+li{margin-top:10px}
.footer__links a{font-size:14px;color:var(--muted-450)}
.footer__links a:hover{color:var(--cyan-400)}
.footer__meta li{margin-bottom:14px}
.footer__meta li:last-child{margin-bottom:0}
.footer__field{display:block;font-size:11px;letter-spacing:.24em;color:var(--muted-450)}
.footer__value{display:inline-block;margin-top:4px;font-size:13px;color:var(--paper-050);word-break:break-all}
.copy-btn{
  margin-left:8px;vertical-align:middle;
  padding:2px 8px;border:1px solid var(--line-500);
  font-size:11px;letter-spacing:.08em;color:var(--muted-450);
  transition:border-color 160ms ease,color 160ms ease;
}
.copy-btn:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.copy-btn[data-copied="true"]{border-color:var(--orange-500);color:var(--orange-500)}
.copy-btn[data-copied="false"]{border-color:var(--red-600);color:#e0607a}
.footer__note{margin-top:14px;font-size:12px;line-height:1.7;color:var(--muted-450)}
.footer__bottom{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px;
  padding-top:20px;padding-bottom:28px;
  border-top:1px solid var(--ink-650);
  font-size:12px;color:var(--muted-450);
}
.footer__copy{margin:0}
.footer__legal{display:flex;gap:24px}
.footer__legal a{color:var(--muted-450)}
.footer__legal a:hover{color:var(--cyan-400)}

/* ---------- 13. Motion / reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14. Responsive ---------- */
@media (max-width:1279px){:root{--pad:40px}}
@media (max-width:900px){
  :root{--pad:32px}
  .section{padding:72px 0}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .section__head--split{align-items:flex-start}
}
@media (max-width:1079px){
  body{padding-bottom:58px}
  .nav-toggle{display:inline-flex}
  .site-header[data-open="true"] .nav-toggle{position:relative;z-index:90;border-color:var(--cyan-400);color:var(--cyan-400);background:var(--ink-950)}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
  .site-header[data-open="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
  .nav{
    position:fixed;top:0;right:0;bottom:0;z-index:80;
    width:min(320px,86vw);
    margin:0;
    background:var(--ink-850);
    border-left:1px solid var(--line-500);
    padding:76px 0 40px;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform 240ms var(--ease);
  }
  .site-header[data-open="true"] .nav{transform:translateX(0)}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__item{border-bottom:1px solid var(--ink-650)}
  .nav__link{
    height:auto;padding:18px 24px;
    border-bottom:0;border-left:3px solid transparent;
    font-size:17px;
  }
  .nav__link:hover{background:rgba(47,230,208,.06);border-left-color:var(--line-500);border-bottom-color:transparent}
  .nav__link[aria-current="page"]{border-bottom-color:transparent;border-left-color:var(--cyan-400);background:rgba(47,230,208,.05)}
  .nav__idx{font-size:11px}
  .quickbar{display:flex}
}
@media (max-width:600px){
  :root{--pad:20px}
  body{font-size:15px}
  .section{padding:56px 0}
  .rail__meta{gap:16px}
  .rail__meta .rail__item+.rail__item{display:none}
  .rail__inner{font-size:10px;letter-spacing:.12em}
  .brand__text{font-size:16px}
  .brand__mark{width:26px;height:26px}
  .bar__inner{min-height:58px;gap:16px}
  .footer__grid{grid-template-columns:1fr;padding-bottom:40px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .stats{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}
}

/* ---------- 15. Prefers 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .bar__fill{transform:scaleX(var(--v,.5))}
  .scroll-progress{transform:scaleX(1)}
}