:root{
  --abyss:#0A1F44;
  --night:#061229;
  --card:#16305C;
  --teal:#0E3A4A;
  --indigo:#241046;
  --wine:#3B0F2C;
  --cyan:#00E5FF;
  --magenta:#FF2D95;
  --orange:#FF8A00;
  --mist:#E8EEF9;
  --haze:#93A6C4;
  --green:#2AF0B0;
  --ink:#150700;
  --cut:14px;
  --rail-w:272px;
  --gutter:clamp(18px,4.6vw,52px);
  --maxw:1140px;
  --font-display:"Inter","Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
  --z-nav:90;
  --z-top:110;
  --z-progress:120;
  --z-skip:200;
}

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

body{
  min-height:100%;
  padding-left:var(--rail-w);
  background-color:var(--night);
  background-image:
    radial-gradient(1100px 560px at 84% -8%, rgba(0,229,255,.10), transparent 62%),
    radial-gradient(900px 520px at 6% 106%, rgba(255,45,149,.09), transparent 62%),
    linear-gradient(180deg,var(--abyss) 0%, var(--night) 46%, var(--night) 100%);
  background-attachment:fixed;
  color:var(--mist);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-nav-open{overflow:hidden}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.01em;
  color:var(--mist);
}
h1{font-size:clamp(34px,5.2vw,64px)}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:clamp(17px,1.8vw,20px);letter-spacing:0}
p,li{font-size:17px;line-height:1.75;color:var(--mist)}
small{font-size:13px;color:var(--haze)}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

#main-content{scroll-margin-top:96px;display:block}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:16px;
  z-index:var(--z-skip);
  padding:12px 18px;
  background:var(--cyan);
  color:var(--night);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:top .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:14px}

/* ---------- reading progress ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:var(--z-progress);
  background:rgba(147,166,196,.14);
  pointer-events:none;
}
.read-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--magenta) 58%,var(--orange) 100%);
  box-shadow:0 0 12px rgba(0,229,255,.55);
  transition:width .12s linear;
}

/* ---------- header rail ---------- */
.site-header{
  position:fixed;
  top:0;left:0;
  z-index:var(--z-nav);
  width:var(--rail-w);
  height:100vh;
  height:100dvh;
  padding:32px 20px 26px;
  display:flex;
  flex-direction:column;
  gap:22px;
  background-color:transparent;
  transition:background-color .45s var(--ease), box-shadow .45s var(--ease);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(165deg, rgba(10,31,68,.62) 0%, rgba(6,18,41,.26) 52%, rgba(6,18,41,.94) 100%);
  transition:opacity .45s var(--ease);
  opacity:1;
}
.site-header::after{
  content:"";
  position:absolute;
  top:0;right:0;bottom:0;
  width:1px;
  pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(0,229,255,.42) 26%,rgba(255,45,149,.26) 72%,transparent);
}
.site-header > *{position:relative;z-index:1}
.site-header.is-solid{background-color:var(--night);box-shadow:16px 0 48px -34px #000}
.site-header.is-solid::before{opacity:0}

/* ---------- brand ---------- */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--mist);
}
.brand__mark{
  flex:0 0 auto;
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--night);
  background:linear-gradient(140deg,var(--cyan) 0%,var(--green) 100%);
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
}
.brand__text{display:flex;flex-direction:column;gap:4px;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--mist);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--haze);
  text-transform:uppercase;
}
.brand:hover .brand__mark{filter:brightness(1.08)}

/* ---------- nav toggle ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border:0;
  cursor:pointer;
  background:rgba(22,48,92,.92);
  color:var(--mist);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  position:relative;
  z-index:3;
}
.nav-toggle:hover{background:var(--card)}
.nav-toggle__bars{position:relative;display:block;width:20px;height:12px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;
  height:2px;
  background:var(--cyan);
  transition:transform .3s var(--ease), top .3s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{top:10px}
.nav-toggle__label{display:inline-block;line-height:1}
.site-header[data-open] .nav-toggle{background:var(--card)}
.site-header[data-open] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{top:5px;transform:rotate(-45deg)}

/* ---------- nav ---------- */
.site-nav{
  display:flex;
  flex-direction:column;
  gap:20px;
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
}
.site-nav__list{display:flex;flex-direction:column;gap:2px}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 12px;
  text-decoration:none;
  color:var(--haze);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:600;
  line-height:1.3;
  background:transparent;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:color .25s var(--ease), background-color .25s var(--ease);
}
.site-nav__link:hover{color:var(--mist);background:rgba(22,48,92,.72)}
.site-nav__link[aria-current="page"]{
  color:var(--mist);
  background:rgba(22,48,92,.92);
  box-shadow:inset 3px 0 0 var(--orange);
}
.site-nav__idx{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--cyan);
  opacity:.72;
}
.site-nav__label{display:inline-block}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--orange);opacity:1}

.nav-cta{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 16px;
  text-decoration:none;
  background:var(--orange);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:background-color .25s var(--ease), transform .25s var(--ease);
}
.nav-cta:hover{background:#FFA42E;transform:translateY(-2px)}
.nav-cta:active{transform:translateY(0)}

.rail-meta{
  display:flex;
  align-items:center;
  gap:8px;
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  line-height:1.4;
  letter-spacing:.1em;
  color:var(--haze);
  text-transform:uppercase;
}
.rail-meta__dot{
  flex:0 0 auto;
  width:6px;height:6px;
  background:var(--green);
  box-shadow:0 0 10px rgba(42,240,176,.9);
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin:0;
  padding:clamp(48px,7vw,80px) 0 24px;
  background:linear-gradient(180deg,var(--abyss) 0%,var(--night) 64%);
  border-top:1px solid rgba(147,166,196,.16);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan) 20%,var(--magenta) 56%,var(--orange) 82%,transparent);
  opacity:.75;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:-24%;right:-12%;
  width:56%;height:150%;
  pointer-events:none;
  background:linear-gradient(115deg,transparent 49.5%,rgba(0,229,255,.10) 49.5% 50.1%,transparent 50.1%),
             linear-gradient(115deg,transparent 61.5%,rgba(255,45,149,.08) 61.5% 62.1%,transparent 62.1%);
}
.footer-inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:1.5fr 1fr 1.2fr;
  gap:clamp(28px,4vw,56px);
}
.footer-brand{min-width:0}
.footer-lockup{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}
.footer-lockup__mark{
  width:36px;height:36px;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--night);
  background:linear-gradient(140deg,var(--cyan) 0%,var(--green) 100%);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.footer-lockup__name{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:800;
  color:var(--mist);
}
.footer-summary{
  margin-top:16px;
  max-width:34ch;
  font-size:15px;
  line-height:1.7;
  color:var(--haze);
}
.footer-cta{
  margin-top:20px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  text-decoration:none;
  background:var(--orange);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.02em;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:background-color .25s var(--ease), transform .25s var(--ease);
}
.footer-cta:hover{background:#FFA42E;transform:translateY(-2px)}
.footer-heading{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--haze);
}
.footer-nav{min-width:0}
.footer-nav__list{display:flex;flex-direction:column;gap:10px}
.footer-nav__link{
  position:relative;
  display:inline-block;
  padding-left:0;
  font-size:15px;
  color:var(--mist);
  text-decoration:none;
  transition:color .25s var(--ease), padding-left .25s var(--ease);
}
.footer-nav__link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:0;height:1px;
  background:var(--cyan);
  transition:width .25s var(--ease);
}
.footer-nav__link:hover{color:var(--cyan);padding-left:20px}
.footer-nav__link:hover::before{width:14px}
.footer-contact{min-width:0}
.footer-contact__line{display:flex;flex-direction:column;gap:3px;margin-bottom:12px}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--haze);
}
.footer-contact__value{
  font-size:15px;
  line-height:1.6;
  color:var(--mist);
  word-break:break-word;
}
.footer-contact__meta{
  margin-top:6px;
  font-size:13px;
  line-height:1.7;
  color:var(--haze);
}
.footer-base{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin:clamp(32px,5vw,56px) auto 0;
  padding:20px var(--gutter) 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  border-top:1px solid rgba(147,166,196,.14);
}
.footer-base__legal{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  line-height:1.6;
  letter-spacing:.03em;
  color:var(--haze);
}
.footer-base__links{display:flex;flex-wrap:wrap;gap:18px}
.footer-base__link{
  font-size:13px;
  color:var(--haze);
  text-decoration:none;
  transition:color .25s var(--ease);
}
.footer-base__link:hover{color:var(--cyan)}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;
  right:20px;bottom:20px;
  z-index:var(--z-top);
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:11px 14px;
  border:0;
  cursor:pointer;
  background:var(--card);
  color:var(--mist);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, background-color .25s var(--ease), color .25s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--orange);color:var(--ink)}
.to-top__icon{font-family:var(--font-mono);font-size:14px;line-height:1}
.to-top__text{line-height:1}

/* ---------- shared layout & components ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{position:relative;padding-block:clamp(56px,8vw,104px)}
.section--tight{padding-block:clamp(32px,5vw,56px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--magenta));
}
.lede{
  max-width:62ch;
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;
  color:var(--haze);
}
.num{
  font-family:var(--font-mono);
  font-weight:600;
  letter-spacing:.08em;
  font-variant-numeric:tabular-nums;
}
.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--cyan),rgba(255,45,149,.5) 45%,transparent 100%);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  line-height:1;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
  background:rgba(0,229,255,.10);
  border:1px solid rgba(0,229,255,.35);
  border-radius:0;
}
.tag--magenta{color:var(--magenta);background:rgba(255,45,149,.10);border-color:rgba(255,45,149,.38)}
.tag--orange{color:var(--orange);background:rgba(255,138,0,.10);border-color:rgba(255,138,0,.38)}
.tag--green{color:var(--green);background:rgba(42,240,176,.10);border-color:rgba(42,240,176,.38)}

.cut{
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:var(--card);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}

.btn{
  --btn-bg:var(--card);
  --btn-fg:var(--mist);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 22px;
  border:0;
  cursor:pointer;
  text-decoration:none;
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  line-height:1;
  letter-spacing:.01em;
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:background-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{--btn-bg:var(--orange);--btn-fg:var(--ink)}
.btn--primary:hover{--btn-bg:#FFA42E}
.btn--cyan{--btn-bg:var(--cyan);--btn-fg:var(--night)}
.btn--cyan:hover{--btn-bg:#5CF0FF}
.btn--line{--btn-bg:transparent;--btn-fg:var(--mist);box-shadow:inset 0 0 0 1px rgba(147,166,196,.5)}
.btn--line:hover{--btn-bg:rgba(22,48,92,.85);--btn-fg:var(--mist)}

.band{
  position:relative;
  overflow:hidden;
  padding-block:clamp(48px,7vw,88px);
  border-block:1px solid rgba(147,166,196,.14);
}
.band::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(120deg,transparent 0 45.8%,rgba(232,238,249,.06) 45.8% 46.4%,transparent 46.4% 100%);
}
.band > *{position:relative;z-index:1}
.band--teal{background:linear-gradient(135deg,var(--teal) 0%,#08202B 72%)}
.band--indigo{background:linear-gradient(135deg,var(--indigo) 0%,#120A26 72%)}
.band--wine{background:linear-gradient(135deg,var(--wine) 0%,#1A0713 72%)}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,2vw,24px);
}
.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-12{grid-column:span 12}
.offset-1{grid-column-start:2}
.offset-2{grid-column-start:3}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  line-height:1.4;
  letter-spacing:.08em;
  color:var(--haze);
}
.crumbs__item{display:inline-flex}
.crumbs__sep{color:rgba(147,166,196,.6)}
.crumbs a{color:var(--haze);text-decoration:none}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--mist)}

.figure{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  background-color:var(--card);
  background-image:
    linear-gradient(135deg,rgba(0,229,255,.16),rgba(255,45,149,.13) 55%,rgba(255,138,0,.10)),
    linear-gradient(0deg,var(--card),var(--card));
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(232,238,249,.10) 0 1px,transparent 1px 22px);
  opacity:.5;
}
.figure > img,
.figure > svg{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure--wide{aspect-ratio:16/9}
.figure--square{aspect-ratio:1/1}
.figure--tall{aspect-ratio:4/5}
.figure--band{aspect-ratio:21/9}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

/* ---------- reveal protocol ---------- */
[data-reveal].is-in{animation:rise-in .5s var(--ease) both}
@keyframes rise-in{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:none}
}

/* ---------- tablet ---------- */
@media (max-width:1279px){
  :root{--rail-w:244px}
  .site-header{padding:26px 16px 22px}
  .brand__name{font-size:15px}
  .site-nav__link{font-size:14px;padding:10px}
}

/* ---------- mobile ---------- */
@media (max-width:1023px){
  :root{--rail-w:0px}
  body{padding-left:0}
  #main-content{padding-top:72px}

  .site-header{
    width:100%;
    height:auto;
    min-height:0;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:12px 16px;
    background-color:transparent;
  }
  .site-header::before{
    background:linear-gradient(180deg,rgba(6,18,41,.97) 0%,rgba(6,18,41,.80) 62%,rgba(6,18,41,0) 100%);
  }
  .site-header::after{display:none}
  .site-header.is-solid,
  .site-header[data-open]{
    background-color:var(--night);
    box-shadow:0 12px 32px -20px #000;
  }
  .site-header.is-solid::before,
  .site-header[data-open]::before{opacity:0}

  .brand{position:relative;z-index:2;gap:10px}
  .brand__mark{width:38px;height:38px;font-size:12px;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
  .brand__name{font-size:15px}
  .brand__sub{display:none}

  .nav-toggle{display:inline-flex}
  .rail-meta{display:none}

  .site-nav{
    position:fixed;
    inset:0;
    z-index:1;
    display:flex;
    flex-direction:column;
    justify-content:flex-start;
    gap:24px;
    padding:96px 22px 40px;
    overflow-y:auto;
    background:linear-gradient(158deg,rgba(36,16,70,.97) 0%,rgba(6,18,41,.99) 52%,rgba(14,58,74,.97) 100%);
    background-image:
      linear-gradient(158deg,rgba(36,16,70,.97) 0%,rgba(6,18,41,.99) 52%,rgba(14,58,74,.97) 100%),
      repeating-linear-gradient(115deg,rgba(232,238,249,.05) 0 1px,transparent 1px 26px);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  }
  .site-header[data-open] .site-nav{opacity:1;visibility:visible;transform:none}

  .site-nav__list{gap:0}
  .site-nav__link{
    padding:16px 6px;
    font-size:19px;
    font-weight:700;
    border-bottom:1px solid rgba(147,166,196,.16);
    clip-path:none;
    background:transparent;
    box-shadow:none;
  }
  .site-nav__link:hover{background:transparent;color:var(--cyan)}
  .site-nav__link[aria-current="page"]{
    background:transparent;
    box-shadow:none;
    color:var(--cyan);
  }
  .site-nav__idx{font-size:12px;color:var(--magenta);opacity:1}
  .site-nav__link[aria-current="page"] .site-nav__idx{color:var(--orange)}
  .nav-cta{margin-top:4px;align-self:flex-start;padding:15px 24px;font-size:15px}

  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .footer-summary{max-width:52ch}
}

@media (max-width:719px){
  .heading,.figure--band{aspect-ratio:16/9}
  .grid-12{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid-12 > *{grid-column:1/-1}
  .footer-inner{grid-template-columns:1fr;gap:32px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px}
  .to-top{right:14px;bottom:14px;padding:10px 12px}
  .to-top__text{display:none}
  .section{padding-block:clamp(40px,10vw,64px)}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html.js{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
  [data-reveal].is-in{animation:none!important;opacity:1!important;transform:none!important}
  .to-top{transform:none}
}