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

/* ===== tokens ===== */
:root{
  --ink-950:#040C16;
  --ink-900:#06111F;
  --panel:#0B1F33;
  --sea:#123A5A;
  --cyan:#36F1E0;
  --teal:#1AA7B8;
  --gold:#F3BC57;
  --paper:#F3F7FB;
  --muted:#8EA6BA;
  --line:#24445C;
  --line-soft:rgba(36,68,92,.58);
  --text-soft:#C7D7E4;
  --glow:0 0 0 1px rgba(54,241,224,.32),0 18px 44px -30px rgba(54,241,224,.75);
  --radius-s:2px;
  --radius-m:4px;
  --gutter:clamp(18px,4vw,40px);
  --max:1280px;
  --font-sans:"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","SFMono-Regular",ui-monospace,"Cascadia Mono","Menlo",consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== base ===== */
html,body{min-height:100%}
body{
  background-color:var(--ink-900);
  background-image:
    radial-gradient(940px 520px at 82% -12%,rgba(54,241,224,.10),transparent 62%),
    radial-gradient(720px 460px at 4% 8%,rgba(243,188,87,.055),transparent 66%),
    linear-gradient(180deg,#06111F 0%,#05101C 58%,#040C16 100%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(54,241,224,.28);color:#031A20}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
hr{border:0;border-top:1px solid var(--line-soft);margin:0}

/* ===== skip link ===== */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-180%);
  display:inline-block;padding:10px 18px;
  background:var(--cyan);color:#04202A;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  border-radius:var(--radius-s);
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);outline:2px solid var(--paper);outline-offset:2px}

/* ===== layout ===== */
.container{
  width:min(100% - 2 * var(--gutter),var(--max));
  margin-inline:auto;
}
.section{padding-block:clamp(44px,6.4vw,92px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;
  gap:10px 24px;
  margin-bottom:clamp(22px,3vw,40px);
  padding-bottom:14px;
  border-bottom:1px solid var(--line-soft);
}
.section__title{font-size:clamp(26px,3.4vw,44px);font-weight:300;line-height:1.24;letter-spacing:-.01em;color:var(--paper)}
.section__index{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--teal);font-variant-numeric:tabular-nums}
.split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,9fr);gap:clamp(20px,3vw,48px);align-items:start}
.split__rail{min-width:0}
.split__main{min-width:0}
.index-rail{
  position:sticky;top:132px;
  display:grid;gap:2px;
  padding-left:14px;
  border-left:1px solid var(--line-soft);
}
.index-rail__link{
  display:block;padding:5px 0;
  font-size:13px;letter-spacing:.04em;color:var(--muted);
  transition:color .2s var(--ease);
}
.index-rail__link:hover{color:var(--paper)}
.index-rail__link[aria-current="true"]{color:var(--cyan)}
.index-rail__link[aria-current="true"]::before{content:"— ";color:var(--gold)}

/* ===== typography ===== */
.display{
  font-size:clamp(48px,8vw,128px);
  font-weight:200;line-height:1.02;letter-spacing:-.025em;
  color:var(--paper);
}
.eyebrow,.mono{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  font-variant-numeric:tabular-nums;color:var(--muted);
}
.eyebrow{color:var(--teal)}
.lead{font-size:clamp(17px,1.5vw,21px);line-height:1.85;color:var(--text-soft);max-width:34em}
.note{font-size:12.5px;line-height:1.85;letter-spacing:.02em;color:var(--muted)}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  font-size:14px;font-weight:500;letter-spacing:.06em;line-height:1.4;
  border:1px solid transparent;border-radius:var(--radius-s);
  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(--cyan);border-color:var(--cyan);color:#04202A}
.btn--primary:hover{background:#5FF8EC;transform:translateY(-1px);box-shadow:0 12px 30px -16px rgba(54,241,224,.95)}
.btn--ghost{background:rgba(18,58,90,.34);border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px)}
.btn--quiet{padding-inline:0;color:var(--cyan);border-color:transparent}
.btn--quiet:hover{color:var(--paper)}

/* ===== tags ===== */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;
  border:1px solid var(--line);border-radius:999px;
  background:rgba(18,58,90,.32);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted);
}
.tag--cyan{color:#9BFBF3;border-color:rgba(54,241,224,.48);background:rgba(54,241,224,.1)}
.tag--gold{color:var(--gold);border-color:rgba(243,188,87,.5);background:rgba(243,188,87,.1)}

/* ===== bento modules ===== */
.bento-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,22px)}
.bento{
  position:relative;grid-column:span 4;min-width:0;
  padding:clamp(18px,2vw,28px);
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-m);
  box-shadow:0 18px 40px -34px rgba(0,0,0,.9);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease);
}
.bento:hover{transform:translateY(-4px);border-color:rgba(54,241,224,.5);box-shadow:var(--glow);background:#0C2237}
.bento--wide{grid-column:span 8}
.bento--half{grid-column:span 6}
.bento--full{grid-column:span 12}
.bento--tall{grid-row:span 2}
.bento__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--teal)}
.bento__value{
  margin-top:10px;
  font-family:var(--font-mono);font-size:clamp(30px,4.6vw,56px);font-weight:300;
  line-height:1.05;letter-spacing:-.01em;color:var(--paper);font-variant-numeric:tabular-nums;
}
.bento__text{margin-top:10px;font-size:14px;line-height:1.85;color:var(--muted)}

/* ===== card & stat ===== */
.card{
  display:block;
  padding:clamp(18px,2vw,26px);
  background:var(--panel);border:1px solid var(--line-soft);border-radius:var(--radius-m);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(54,241,224,.45);box-shadow:var(--glow)}
.card__title{font-size:18px;font-weight:500;line-height:1.5;color:var(--paper)}
.card__text{margin-top:8px;font-size:14px;line-height:1.85;color:var(--muted)}
.stat{display:grid;gap:6px;padding:clamp(16px,2vw,24px);border-left:2px solid var(--cyan);background:rgba(11,31,51,.72)}
.stat__value{font-family:var(--font-mono);font-size:clamp(26px,3.6vw,44px);font-weight:300;line-height:1.1;color:var(--cyan);font-variant-numeric:tabular-nums}
.stat__label{font-size:12px;letter-spacing:.14em;color:var(--muted)}

/* ===== media frame (image placeholder) ===== */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:
    radial-gradient(120% 90% at 78% 8%,rgba(54,241,224,.16),transparent 58%),
    linear-gradient(150deg,#0B1F33 0%,#061423 56%,#0A2438 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame img,.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:26px 14px 10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted);
  background:linear-gradient(0deg,rgba(4,12,22,.94),rgba(4,12,22,0));
}

/* ===== breadcrumbs & prose ===== */
.breadcrumbs{padding-block:16px;font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__item[aria-current="page"]{color:var(--paper)}
.breadcrumbs__link{transition:color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--cyan)}
.breadcrumbs__sep{color:var(--line)}
.prose{max-width:74ch;font-size:16.5px;line-height:1.9;color:var(--text-soft)}
.prose>*+*{margin-top:1.05em}
.prose h2{margin-top:2em;font-size:clamp(22px,2.4vw,30px);font-weight:400;line-height:1.4;color:var(--paper)}
.prose h3{margin-top:1.7em;font-size:18px;font-weight:500;color:var(--paper)}
.prose strong{color:var(--paper);font-weight:500}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(54,241,224,.4)}
.prose ul,.prose ol{display:grid;gap:.5em;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li::marker{color:var(--teal)}

/* ===== header ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(6,17,31,.985),rgba(6,17,31,.9));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.header-rail{border-bottom:1px solid var(--line-soft);background:rgba(4,12,22,.62)}
.header-rail__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-block:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.header-rail__meta{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.header-rail__meta--end{color:var(--gold)}
.header-rail__dot{
  flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(54,241,224,.16);
}
.header-main{
  position:relative;
  display:flex;align-items:center;gap:clamp(14px,2.4vw,36px);
  padding-block:15px;
}
.brand{display:flex;align-items:center;gap:13px;flex:0 0 auto;transition:opacity .2s var(--ease)}
.brand:hover{opacity:.86}
.brand__mark{
  display:grid;place-items:center;width:46px;height:46px;
  border:1px solid rgba(54,241,224,.65);
  background:linear-gradient(160deg,rgba(54,241,224,.16),transparent 72%);
  color:var(--cyan);
  font-family:var(--font-mono);font-size:16px;letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  transition:border-color .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease);
}
.brand:hover .brand__mark{border-color:var(--cyan);color:var(--paper);box-shadow:0 0 0 1px rgba(54,241,224,.4)}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{font-size:19px;font-weight:500;letter-spacing:.06em;line-height:1.35;color:var(--paper)}
.brand__tagline{font-size:11px;letter-spacing:.16em;line-height:1.4;color:var(--muted)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  margin-left:auto;padding:10px 14px;
  border:1px solid var(--line);border-radius:var(--radius-s);
  color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(54,241,224,.6);color:var(--cyan)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:var(--cyan);transition:background-color .2s var(--ease),transform .2s var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--cyan);transition:transform .2s var(--ease),top .2s var(--ease)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{line-height:1}

.site-nav{margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:clamp(0px,1vw,8px);flex-wrap:wrap;justify-content:flex-end}
.site-nav__item{min-width:0}
.site-nav__link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 9px;
  font-size:14px;letter-spacing:.04em;line-height:1.4;color:var(--text-soft);
  transition:color .2s var(--ease);
}
.site-nav__index{font-family:var(--font-mono);font-size:10px;letter-spacing:.1em;color:var(--teal);font-variant-numeric:tabular-nums;transition:color .2s var(--ease)}
.site-nav__link::after{
  content:"";position:absolute;left:9px;right:9px;bottom:5px;height:1px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.site-nav__link:hover{color:var(--paper)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--cyan)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--gold)}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--gold)}
.site-nav__item--cta{display:none}
.site-nav__link--cta{
  justify-content:center;width:100%;
  border:1px solid rgba(54,241,224,.45);border-radius:var(--radius-s);
  color:var(--cyan);padding:12px 14px;
}
.site-nav__link--cta::after{display:none}
.site-nav__link--cta:hover{background:rgba(54,241,224,.12);color:var(--paper)}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;pointer-events:none}
.scroll-progress__bar{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--teal),var(--cyan) 62%,var(--gold))}

/* ===== footer ===== */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,104px);
  padding-top:clamp(40px,5.6vw,72px);
  background:linear-gradient(180deg,#050E1A 0%,#040B13 100%);
  border-top:1px solid var(--line);
  color:var(--muted);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,rgba(54,241,224,0),rgba(54,241,224,.65),rgba(243,188,87,.35),rgba(54,241,224,0));
}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.9fr);
  gap:clamp(30px,5vw,72px);
  padding-bottom:clamp(32px,4.6vw,56px);
}
.footer-intro{min-width:0}
.footer-brand{display:inline-flex;align-items:center;gap:12px;color:var(--paper);transition:opacity .2s var(--ease)}
.footer-brand:hover{opacity:.85}
.footer-brand__mark{
  display:grid;place-items:center;width:40px;height:40px;
  border:1px solid rgba(243,188,87,.55);
  background:linear-gradient(160deg,rgba(243,188,87,.14),transparent 72%);
  color:var(--gold);
  font-family:var(--font-mono);font-size:14px;font-variant-numeric:tabular-nums;
}
.footer-brand__name{font-size:19px;font-weight:500;letter-spacing:.08em}
.footer-brand__line{margin-top:16px;max-width:30ch;font-size:14px;line-height:1.9;color:var(--muted)}
.footer-contact{margin-top:22px;display:grid;gap:0}
.footer-contact__item{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:12px;align-items:start;
  padding-block:9px;border-bottom:1px dashed rgba(36,68,92,.7);
}
.footer-contact__key{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--teal);line-height:1.9}
.footer-contact__value{font-size:13.5px;line-height:1.85;color:#D6E4EF;overflow-wrap:anywhere}
.footer-note{margin-top:16px;max-width:34ch;font-size:12px;line-height:1.85;color:var(--muted)}
.footer-contact__link{
  display:inline-block;margin-top:14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--cyan);border-bottom:1px solid rgba(54,241,224,.35);padding-bottom:3px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-contact__link:hover{color:var(--paper);border-color:var(--paper)}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,40px);min-width:0}
.footer-col{min-width:0}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:400;letter-spacing:.2em;
  color:var(--gold);line-height:1.6;
}
.footer-col__list{display:grid;gap:10px}
.footer-col__item{min-width:0}
.footer-col__link{
  position:relative;display:inline-block;padding-left:13px;
  font-size:14px;line-height:1.7;color:var(--text-soft);
  transition:color .2s var(--ease);
}
.footer-col__link::before{
  content:"";position:absolute;left:0;top:.72em;width:5px;height:1px;background:var(--teal);
  transition:width .2s var(--ease),background-color .2s var(--ease);
}
.footer-col__link:hover{color:var(--cyan)}
.footer-col__link:hover::before{width:9px;background:var(--cyan)}

.footer-legal{border-top:1px solid var(--line-soft);padding-block:18px;background:rgba(4,12,22,.5)}
.footer-legal__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.footer-legal__copy{display:flex;flex-wrap:wrap;gap:6px 18px;margin:0}
.footer-legal__meta{line-height:1.8}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:6px 18px}
.footer-legal__link{line-height:1.8;color:var(--muted);transition:color .2s var(--ease)}
.footer-legal__link:hover{color:var(--cyan)}

/* ===== reveal protocol ===== */
.has-reveal [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-reveal [data-reveal].is-revealed{opacity:1;transform:none}

/* ===== responsive ===== */
@media (max-width:1060px){
  .nav-toggle{display:inline-flex}
  .header-actions{display:none}
  .site-nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    margin:0;padding:6px 0 18px;
    background:#07182A;
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 60px -32px #000;
    max-height:calc(100vh - 130px);
    overflow-y:auto;
  }
  .site-nav[data-open="true"]{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding-inline:var(--gutter);justify-content:flex-start}
  .site-nav__link{display:flex;width:100%;padding:14px 2px;font-size:16px;border-bottom:1px solid rgba(36,68,92,.42);color:var(--paper)}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{color:var(--cyan)}
  .site-nav__index{font-size:11px}
  .site-nav__item--cta{display:block;margin-top:14px}
  .site-nav__link--cta{border-bottom:1px solid rgba(54,241,224,.45);padding:12px 14px}
  .footer-grid{grid-template-columns:1fr}
  .index-rail{position:static;top:auto}
}
@media (max-width:900px){
  .bento,.bento--wide,.bento--half{grid-column:span 6}
  .bento--full{grid-column:span 12}
  .split{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:16px}
  .header-rail__inner{font-size:10px;letter-spacing:.1em;padding-block:6px}
  .header-rail__meta--end{display:none}
  .brand__mark{width:40px;height:40px;font-size:14px}
  .brand__name{font-size:17px}
  .brand__tagline{font-size:10px;letter-spacing:.1em}
  .header-main{padding-block:12px;gap:12px}
  .footer-cols{grid-template-columns:1fr 1fr}
  .footer-legal__inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .bento,.bento--wide,.bento--half,.bento--full{grid-column:span 12}
  .bento--tall{grid-row:auto}
  .footer-cols{grid-template-columns:1fr}
  .footer-contact__item{grid-template-columns:1fr;gap:2px}
  .footer-contact__key{padding-top:2px}
  .btn{width:100%}
}

/* ===== reduced motion ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .bento:hover,.card:hover,.btn:hover{transform:none}
  .has-reveal [data-reveal]{opacity:1;transform:none}
}