:root{
  --ink:#071A15;
  --panel:#0E2B24;
  --glass:rgba(53,242,208,0.12);
  --cyan:#35F2D0;
  --cyan-soft:#A8FFF0;
  --amber:#F5B84B;
  --red:#FF5C5C;
  --indigo:#2E2350;
  --wine:#4A1D2B;
  --paper:#F1EAD8;
  --text:#E9F5F1;
  --muted:#9DBAB2;
  --line:rgba(53,242,208,0.20);
  --line-soft:rgba(53,242,208,0.12);
  --line-strong:rgba(53,242,208,0.45);
  --ink-text:#0A1D17;
  --radius:3px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --measure:min(1280px,100% - 2 * var(--gutter));
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

html{background:var(--ink)}
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 70% at 82% -8%,rgba(53,242,208,0.10),transparent 62%),
    radial-gradient(90% 60% at -10% 104%,rgba(46,35,80,0.42),transparent 70%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(15px,1.02vw,17px);
  font-weight:400;
  line-height:1.85;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--cyan);color:var(--ink-text)}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:-0.005em;
  color:var(--text);
  text-wrap:balance;
}
h1{font-size:clamp(1.9rem,3.2vw,3.4rem)}
h2{font-size:clamp(1.4rem,2.2vw,2.1rem)}
h3{font-size:clamp(1.1rem,1.6vw,1.35rem)}
h4{font-size:1.02rem;letter-spacing:0.01em}

p{text-wrap:pretty}
strong{font-weight:600;color:var(--cyan-soft)}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
main:focus-visible{outline:none}
#main-content{scroll-margin-top:7rem}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  left:1rem;top:0.5rem;
  z-index:120;
  transform:translateY(-180%);
  background:var(--amber);
  color:var(--ink-text);
  font-family:var(--font-mono);
  font-size:0.76rem;
  letter-spacing:0.08em;
  padding:0.62rem 1rem;
  border-radius:2px;
  box-shadow:0 12px 24px -14px rgba(0,0,0,0.9);
}
.skip-link:focus{transform:translateY(0)}
.skip-link:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:3px}

/* ---------- command header ---------- */
.command-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(180deg,rgba(7,26,21,0.98),rgba(9,32,26,0.94));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:border-color 0.25s ease,box-shadow 0.25s ease;
}
.command-header[data-scrolled="true"]{
  border-bottom-color:var(--line-strong);
  box-shadow:0 22px 40px -34px rgba(0,0,0,0.95);
}
.command-header__rail{
  height:2px;
  background:var(--line-soft);
  overflow:hidden;
}
.command-header__rail-track{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan-soft) 55%,var(--amber) 100%);
  transition:transform 0.14s linear;
  will-change:transform;
}
.command-header__inner{
  width:var(--measure);
  margin-inline:auto;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:1.25rem;
  padding-block:0.6rem;
  position:relative;
}
.command-header__brand-cluster{
  display:flex;
  align-items:center;
  gap:0.85rem;
  min-width:0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:0.55rem;
  padding:0.14rem 0;
  border-radius:2px;
}
.brand__index{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.14em;
  background:var(--amber);
  color:var(--ink-text);
  padding:0.16rem 0.42rem;
  border-radius:2px;
  line-height:1.5;
}
.brand__text{
  font-family:var(--font-display);
  font-weight:700;
  font-size:1.16rem;
  letter-spacing:0.03em;
  color:var(--text);
  transition:color 0.18s ease;
  white-space:nowrap;
}
.brand:hover .brand__text,
.brand:focus-visible .brand__text{color:var(--cyan-soft)}
.edition-badge{
  display:inline-flex;
  align-items:center;
  gap:0.42rem;
  border:1px solid var(--line-strong);
  background:var(--glass);
  color:var(--cyan-soft);
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.14em;
  line-height:1.6;
  padding:0.16rem 0.55rem;
  border-radius:999px;
  white-space:nowrap;
}
.edition-badge__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,242,208,0.18);
  animation:edition-pulse 3.4s ease-in-out infinite;
}
@keyframes edition-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 2px rgba(53,242,208,0.20)}
  50%{opacity:0.55;box-shadow:0 0 0 6px rgba(53,242,208,0)}
}

/* ---------- primary nav ---------- */
.primary-nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:1rem;
  min-width:0;
}
.primary-nav__list{
  display:flex;
  align-items:center;
  gap:0.1rem;
}
.primary-nav__item{display:block}
.primary-nav__link{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:0.36rem;
  padding:0.45rem 0.58rem;
  border-radius:2px;
  transition:background 0.18s ease,color 0.18s ease;
}
.primary-nav__num{
  font-family:var(--font-mono);
  font-size:0.62rem;
  letter-spacing:0.1em;
  color:var(--muted);
  transition:color 0.18s ease;
}
.primary-nav__label{
  font-size:0.86rem;
  font-weight:500;
  color:var(--text);
  white-space:nowrap;
  transition:color 0.18s ease;
}
.primary-nav__link::after{
  content:"";
  position:absolute;
  left:0.58rem;right:0.58rem;bottom:0.16rem;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 0.22s ease,background 0.22s ease;
}
.primary-nav__link:hover{background:var(--glass)}
.primary-nav__link:hover .primary-nav__label{color:var(--cyan-soft)}
.primary-nav__link:hover .primary-nav__num{color:var(--cyan)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{background:var(--glass)}
.primary-nav__link[aria-current="page"] .primary-nav__label{color:var(--cyan-soft)}
.primary-nav__link[aria-current="page"] .primary-nav__num{color:var(--amber)}
.primary-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--amber);
  height:2px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.45rem;
  font-family:var(--font-mono);
  font-size:0.76rem;
  letter-spacing:0.08em;
  line-height:1.5;
  padding:0.62rem 1rem;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background 0.18s ease,color 0.18s ease,border-color 0.18s ease,transform 0.18s ease,box-shadow 0.18s ease;
}
.btn--amber{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--ink-text);
  font-weight:600;
}
.btn--amber:hover{
  background:#FFCB6B;
  border-color:#FFCB6B;
  transform:translateY(-1px);
  box-shadow:0 12px 22px -16px rgba(245,184,75,0.95);
}
.btn--ghost{
  background:var(--glass);
  border-color:var(--line-strong);
  color:var(--cyan-soft);
}
.btn--ghost:hover{
  background:rgba(53,242,208,0.22);
  border-color:var(--cyan);
  color:#FFFFFF;
}
.header-cta{white-space:nowrap}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:0.55rem;
  padding:0.5rem 0.72rem;
  border:1px solid var(--line-strong);
  background:var(--glass);
  border-radius:2px;
  color:var(--text);
  cursor:pointer;
  transition:border-color 0.18s ease,background 0.18s ease;
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(53,242,208,0.18)}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:18px;
}
.nav-toggle__bars span{
  display:block;
  height:1.5px;
  width:100%;
  background:var(--cyan);
  transition:transform 0.22s ease,opacity 0.22s ease;
}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.12em;
  color:var(--cyan-soft);
  white-space:nowrap;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5.5px) 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(-5.5px) rotate(-45deg)}

/* ---------- command hint ---------- */
.command-hint{
  width:var(--measure);
  margin-inline:auto;
  padding:0.34rem 0 0.46rem;
  display:flex;
  align-items:center;
  gap:0.6rem;
  border-top:1px dashed var(--line-soft);
  font-family:var(--font-mono);
  font-size:0.65rem;
  letter-spacing:0.14em;
  color:var(--muted);
}
.command-hint::before{
  content:"";
  width:26px;height:1px;
  background:var(--cyan);
  opacity:0.65;
  flex:none;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,7rem);
  background:linear-gradient(180deg,rgba(14,43,36,0.55),var(--ink) 42%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  opacity:0.55;
}
.site-footer__inner{
  width:var(--measure);
  margin-inline:auto;
  padding:clamp(2.4rem,5vw,3.8rem) 0 1.6rem;
  display:grid;
  grid-template-columns:1.05fr 1.35fr 0.95fr;
  gap:clamp(1.6rem,4vw,3.2rem);
  align-items:start;
}
.site-footer__brand{display:grid;gap:0.75rem;justify-items:start}
.site-footer__mark{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.35rem,2.2vw,1.75rem);
  letter-spacing:0.03em;
  color:var(--text);
}
.site-footer__line{
  font-size:0.82rem;
  line-height:1.8;
  color:var(--muted);
  max-width:24ch;
}
.label-tag{
  display:inline-flex;
  align-items:center;
  gap:0.4rem;
  border:1px solid var(--line-strong);
  background:var(--glass);
  color:var(--cyan-soft);
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.16em;
  line-height:1.6;
  padding:0.2rem 0.55rem;
  border-radius:2px;
}
.footer-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(1.2rem,3vw,2rem);
}
.footer-nav__group{min-width:0}
.footer-nav__title{
  font-family:var(--font-mono);
  font-size:0.66rem;
  font-weight:500;
  letter-spacing:0.2em;
  color:var(--muted);
  padding-bottom:0.55rem;
  margin-bottom:0.85rem;
  border-bottom:1px dashed var(--line-soft);
}
.footer-nav__list{display:grid;gap:0.55rem}
.footer-nav__link{
  display:inline-flex;
  align-items:center;
  gap:0.5rem;
  font-size:0.9rem;
  color:var(--text);
  transition:color 0.18s ease;
}
.footer-nav__link::before{
  content:"";
  width:5px;height:5px;
  background:var(--cyan);
  opacity:0.4;
  flex:none;
  transition:opacity 0.18s ease,background 0.18s ease;
}
.footer-nav__link:hover,
.footer-nav__link:focus-visible{color:var(--cyan-soft)}
.footer-nav__link:hover::before,
.footer-nav__link:focus-visible::before{opacity:1;background:var(--amber)}
.footer-card{
  background:var(--paper);
  color:var(--ink-text);
  border-radius:2px;
  border-left:4px solid var(--amber);
  padding:1.05rem 1.15rem 1.15rem;
  box-shadow:0 18px 32px -28px rgba(0,0,0,0.95);
}
.footer-card__title{
  font-family:var(--font-mono);
  font-size:0.66rem;
  letter-spacing:0.2em;
  color:#4C6659;
  margin-bottom:0.75rem;
}
.footer-card__list{display:grid;gap:0.6rem}
.footer-card__row{
  display:grid;
  grid-template-columns:3.2rem 1fr;
  gap:0.6rem;
  align-items:baseline;
}
.footer-card__term{
  font-family:var(--font-mono);
  font-size:0.62rem;
  letter-spacing:0.1em;
  color:#5A7466;
}
.footer-card__value{
  font-size:0.82rem;
  line-height:1.65;
  color:var(--ink-text);
  word-break:break-word;
}
.site-footer__base{
  grid-column:1 / -1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0.7rem 1.4rem;
  margin-top:0.6rem;
  padding-top:1.35rem;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.08em;
  color:var(--muted);
}
.site-footer__copy{margin:0}
.legal-nav{display:flex;flex-wrap:wrap;gap:0.4rem 1.15rem}
.legal-nav__link{
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color 0.18s ease,border-color 0.18s ease;
}
.legal-nav__link:hover,
.legal-nav__link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan)}
.site-footer__icp{margin-left:auto;color:var(--muted)}

/* ---------- layout primitives ---------- */
.container{width:var(--measure);margin-inline:auto}
.section{padding-block:clamp(2.4rem,6vw,5rem)}
.section--tight{padding-block:clamp(1.6rem,3.5vw,2.6rem)}
.zone--indigo{background:var(--indigo)}
.zone--wine{background:var(--wine)}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--line-strong),transparent)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:0.6rem;
  font-family:var(--font-mono);
  font-size:0.7rem;
  letter-spacing:0.2em;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:none}
.page-title{font-size:clamp(1.9rem,3.2vw,3.4rem)}
.display-title{font-size:clamp(2.4rem,5vw,5.2rem);line-height:1.06}
.lede{
  font-size:clamp(1rem,1.35vw,1.14rem);
  line-height:1.85;
  color:var(--muted);
  max-width:42ch;
}
.prose{max-width:42rem}
.prose > * + *{margin-top:1rem}
.prose h2{margin-top:2rem}
.prose h3{margin-top:1.6rem}
.prose ul{display:grid;gap:0.5rem;padding-left:1.1rem;list-style:square}
.prose li::marker{color:var(--cyan)}
.prose a{color:var(--cyan-soft);border-bottom:1px solid var(--line-strong)}
.prose a:hover{color:#FFFFFF;border-bottom-color:var(--cyan-soft)}
.mono-num{
  display:inline-block;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(2rem,4vw,4.2rem);
  line-height:1;
  letter-spacing:-0.01em;
  color:var(--amber);
  text-shadow:0 0 22px rgba(53,242,208,0.28);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.08em;
  color:var(--muted);
  padding-block:0.9rem 0.2rem;
}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:0.5rem}
.breadcrumbs__list > li{display:inline-flex;align-items:center;gap:0.5rem}
.breadcrumbs__list > li + li::before{content:"/";color:rgba(157,186,178,0.45)}
.breadcrumbs__link{color:var(--muted);transition:color 0.18s ease}
.breadcrumbs__link:hover,.breadcrumbs__link:focus-visible{color:var(--cyan)}
.breadcrumbs__current{color:var(--text)}

/* ---------- panels & tags ---------- */
.panel{
  background:var(--panel);
  border:1px solid rgba(53,242,208,0.16);
  border-radius:var(--radius);
  padding:clamp(1.1rem,2.4vw,1.8rem);
}
.panel--glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-color:var(--line-strong);
}
.panel--paper{
  background:var(--paper);
  color:var(--ink-text);
  border-color:#D8CEB4;
}
.status-dot{
  display:inline-block;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--red);
  box-shadow:0 0 0 3px rgba(255,92,92,0.18);
  flex:none;
}
.status-dot--cyan{background:var(--cyan);box-shadow:0 0 0 3px rgba(53,242,208,0.18)}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background-color:var(--panel);
  background-image:
    linear-gradient(140deg,rgba(53,242,208,0.10),transparent 55%),
    repeating-linear-gradient(0deg,rgba(53,242,208,0.07) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(90deg,rgba(53,242,208,0.07) 0 1px,transparent 1px 40px);
  aspect-ratio:16 / 9;
  width:100%;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:0.55rem 0.85rem;
  font-family:var(--font-mono);
  font-size:0.64rem;
  letter-spacing:0.12em;
  color:var(--cyan-soft);
  background:linear-gradient(0deg,rgba(7,26,21,0.94),rgba(7,26,21,0));
}

/* ---------- grid ---------- */
.layout-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2.2vw,1.75rem);
}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-10{grid-column:span 10}
.span-12{grid-column:span 12}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .command-header__inner{
    grid-template-columns:1fr auto;
    gap:0.75rem;
  }
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    left:calc(-1 * var(--gutter));
    right:calc(-1 * var(--gutter));
    top:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0.75rem;
    padding:0.9rem var(--gutter) 1.4rem;
    background:linear-gradient(180deg,#0B241D,#071A15 85%);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 30px 46px -32px rgba(0,0,0,0.95);
  }
  .js .primary-nav{display:none}
  .js .primary-nav[data-open="true"]{display:flex}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .primary-nav__link{
    width:100%;
    padding:0.72rem 0.2rem;
    border-radius:0;
    border-bottom:1px dashed var(--line-soft);
  }
  .primary-nav__num{font-size:0.7rem;min-width:2.4rem;letter-spacing:0.14em}
  .primary-nav__label{font-size:1rem}
  .primary-nav__link::after{display:none}
  .primary-nav__link:hover{background:rgba(53,242,208,0.08)}
  .primary-nav__link[aria-current="page"]{
    background:rgba(53,242,208,0.10);
    box-shadow:inset 3px 0 0 var(--amber);
    padding-left:0.8rem;
  }
  .header-cta{width:100%;margin-top:0.55rem}
  .command-hint{display:none}
  .site-footer__inner{grid-template-columns:1fr 1fr}
  .site-footer__brand{grid-column:1 / -1}
  .footer-card{grid-column:1 / -1}
}
@media (max-width:900px){
  .layout-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-3,.span-4,.span-5{grid-column:span 3}
  .span-6,.span-7,.span-8,.span-9,.span-10{grid-column:span 6}
}
@media (max-width:720px){
  .site-footer__inner{grid-template-columns:1fr;gap:1.8rem}
  .footer-nav{grid-template-columns:1fr 1fr;gap:1.2rem}
  .site-footer__base{flex-direction:column;align-items:flex-start;gap:0.6rem}
  .site-footer__icp{margin-left:0}
  .edition-badge{display:none}
  .brand__text{font-size:1.05rem}
}
@media (max-width:600px){
  .layout-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-10{grid-column:span 2}
  .footer-nav{grid-template-columns:1fr}
  .footer-card__row{grid-template-columns:2.8rem 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.001ms !important;
    scroll-behavior:auto !important;
  }
  .edition-badge__dot{animation:none;opacity:1}
  .btn--amber:hover{transform:none}
  .command-header__rail-track{transition:none}
}