:root{
  --ink:#081321;
  --ink-soft:#0E2038;
  --teal:#0B2F32;
  --indigo:#26265C;
  --wine:#5A1F3D;
  --cyan:#39E6DF;
  --signal:#FF6A3D;
  --paper:#F5F1E8;
  --steel:#91A6BA;
  --mint:#7BE0B5;
  --line:#1D3A52;
  --line-soft:rgba(29,58,82,.72);
  --cn:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1240px;
  --gutter:clamp(18px,4vw,48px);
  --radius:18px;
  --radius-sm:12px;
  --pill:999px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-island:0 18px 44px -26px rgba(0,0,0,.92),0 0 0 1px rgba(57,230,223,.07);
  --shadow-card:0 28px 60px -46px rgba(0,0,0,.95);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html:focus-within{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{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
::selection{background:var(--cyan);color:var(--ink)}

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 84% -8%,rgba(57,230,223,.10),transparent 62%),
    radial-gradient(900px 560px at 6% 4%,rgba(90,31,61,.30),transparent 60%),
    radial-gradient(1000px 700px at 50% 120%,rgba(38,38,92,.34),transparent 70%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--cn);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3,h4{font-weight:800;line-height:1.08;letter-spacing:-.02em;color:var(--paper);text-wrap:balance}
h1{font-size:clamp(40px,6vw,92px);line-height:1.02}
h2{font-size:clamp(32px,4vw,56px)}
h3{font-size:clamp(20px,2vw,26px);letter-spacing:-.01em;font-weight:700;line-height:1.25}
h4{font-size:17px;font-weight:700;letter-spacing:0;line-height:1.4}
p{text-wrap:pretty}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:8px;
}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.eyebrow{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--steel);
  display:block;
}
.index-num{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--cyan);
  display:inline-block;
}
.lede{
  font-size:clamp(17px,1.6vw,20px);
  line-height:1.7;
  color:rgba(245,241,232,.78);
  max-width:38em;
}
.divider{height:1px;border:0;background:var(--line);margin-block:clamp(24px,4vw,48px)}

/* ---------- layout utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(48px,7vw,104px);position:relative}
.section--midnight{background:linear-gradient(180deg,rgba(14,32,56,.78),rgba(8,19,33,0))}
.section--teal{background:linear-gradient(180deg,rgba(11,47,50,.82),rgba(8,19,33,0))}
.section--indigo{background:linear-gradient(180deg,rgba(38,38,92,.58),rgba(8,19,33,0))}
.section--wine{background:linear-gradient(180deg,rgba(90,31,61,.55),rgba(8,19,33,0))}
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:clamp(24px,3.6vw,44px);max-width:70ch}
.stack{display:flex;flex-direction:column;gap:clamp(12px,1.6vw,20px)}
.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-auto{grid-template-columns:repeat(auto-fill,minmax(258px,1fr))}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--cn);
  font-size:14px;
  font-weight:600;
  letter-spacing:.03em;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--pill);
  cursor:pointer;
  transition:transform .22s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn-sm{padding:8px 16px;font-size:13px}
.btn-signal{
  background:linear-gradient(135deg,var(--signal),#FF8A5E);
  color:#180A05;
  box-shadow:0 14px 28px -18px var(--signal),inset 0 0 0 1px rgba(255,255,255,.18);
}
.btn-signal:hover{transform:translateY(-1px);box-shadow:0 18px 34px -18px var(--signal),inset 0 0 0 1px rgba(255,255,255,.26)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- tags & cards ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
  background:rgba(57,230,223,.10);
  border:1px solid rgba(57,230,223,.28);
  border-radius:var(--pill);
  padding:4px 10px;
}
.tag--signal{color:var(--signal);background:rgba(255,106,61,.13);border-color:rgba(255,106,61,.34)}
.tag--mint{color:var(--mint);background:rgba(123,224,181,.12);border-color:rgba(123,224,181,.32)}

.card{
  position:relative;
  padding:clamp(18px,2.2vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(14,32,56,.94),rgba(8,19,33,.74));
  box-shadow:var(--shadow-card);
  transition:border-color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}
.card:hover{border-color:rgba(57,230,223,.42);transform:translateY(-2px)}
.card p{color:rgba(245,241,232,.76);font-size:15.5px}
.card-panel{
  position:relative;
  padding:clamp(20px,2.4vw,32px);
  border:1px solid rgba(255,106,61,.26);
  border-radius:var(--radius);
  background:linear-gradient(155deg,rgba(90,31,61,.86),rgba(14,32,56,.92));
  box-shadow:var(--shadow-card);
}
.card-panel p{color:rgba(245,241,232,.82);font-size:15.5px}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--steel);
  padding-block:clamp(16px,2.4vw,26px) 0;
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line);font-family:var(--mono)}
.breadcrumb a{color:var(--steel);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- prose ---------- */
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.85;
  color:rgba(245,241,232,.86);
}
.prose>*+*{margin-top:1.15em}
.prose h2{font-size:clamp(24px,2.6vw,34px);margin-top:2em;letter-spacing:-.02em}
.prose h3{margin-top:1.6em}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose strong{color:var(--paper);font-weight:700}
.prose ul,.prose ol{margin-top:1em;display:flex;flex-direction:column;gap:.55em}
.prose li{position:relative;padding-left:20px}
.prose ul li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--cyan);
  opacity:.75;
}
.prose ol{counter-reset:prose-list}
.prose ol li{counter-increment:prose-list}
.prose ol li::before{
  content:counter(prose-list);
  position:absolute;left:0;top:.1em;
  font-family:var(--mono);
  font-size:11px;
  color:var(--signal);
}

/* ---------- media ---------- */
.media-frame{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 90% at 18% 8%,rgba(57,230,223,.20),transparent 55%),
    radial-gradient(90% 80% at 86% 92%,rgba(255,106,61,.18),transparent 60%),
    linear-gradient(160deg,var(--ink-soft),var(--teal));
}
.media-frame img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(8,19,33,0) 45%,rgba(8,19,33,.62));
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-caption{
  margin-top:10px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--steel);
}
.media-glow{
  position:absolute;
  width:60%;
  height:60%;
  border-radius:50%;
  filter:blur(64px);
  opacity:.5;
  pointer-events:none;
  background:var(--cyan);
}

/* ---------- tabs ---------- */
.tabs{display:flex;flex-direction:column;align-items:flex-start}
.tablist{
  display:inline-flex;
  align-items:center;
  gap:4px;
  padding:4px;
  max-width:100%;
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:rgba(14,32,56,.82);
  scrollbar-width:none;
}
.tablist::-webkit-scrollbar{display:none}
.tab{
  appearance:none;
  border:0;
  background:transparent;
  color:var(--steel);
  font-family:var(--cn);
  font-size:13.5px;
  letter-spacing:.02em;
  padding:9px 18px;
  border-radius:var(--pill);
  white-space:nowrap;
  cursor:pointer;
  transition:color .2s var(--ease),background .25s var(--ease);
}
.tab:hover{color:var(--paper);background:rgba(38,38,92,.62)}
.tab[aria-selected="true"]{
  background:linear-gradient(135deg,var(--cyan),#8CF3EE);
  color:#062028;
  font-weight:700;
}
.tabpanel{margin-top:clamp(16px,2.4vw,28px);width:100%}
.tabpanel[hidden]{display:none}

/* ---------- reveal ---------- */
.reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.reveal-ready [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  padding:12px 20px;
  border-radius:var(--radius-sm);
  background:var(--cyan);
  color:#04161C;
  font-weight:700;
  font-size:14px;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:none;outline-offset:4px}

/* ============================================================
   HEADER — floating capsule island
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  padding:14px var(--gutter) 0;
  background:linear-gradient(180deg,rgba(8,19,33,.94),rgba(8,19,33,0));
  transition:padding .35s var(--ease);
}
.header-inner{
  position:relative;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
}
.nav-island{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,26px);
  padding:10px 12px 10px 18px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:linear-gradient(120deg,rgba(14,32,56,.95),rgba(11,47,50,.88));
  box-shadow:var(--shadow-island);
  backdrop-filter:blur(14px) saturate(125%);
  transition:padding .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header.is-condensed{padding-top:8px}
.site-header.is-condensed .nav-island{
  padding-block:6px;
  background:linear-gradient(120deg,rgba(14,32,56,.98),rgba(11,47,50,.94));
  box-shadow:0 22px 50px -28px rgba(0,0,0,.95),0 0 0 1px rgba(57,230,223,.16);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--paper);
}
.brand-mark{
  display:inline-grid;
  place-items:center;
  width:38px;height:38px;
  border-radius:13px;
  font-family:var(--mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.04em;
  color:#062028;
  background:linear-gradient(140deg,var(--cyan),#9CF5F1 55%,var(--mint));
  box-shadow:0 0 0 1px rgba(57,230,223,.42),0 12px 26px -14px var(--cyan);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:15px;font-weight:700;letter-spacing:.04em}
.brand-sub{
  margin-top:3px;
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--steel);
}

.primary-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(10px,1.6vw,22px);
  flex:1 1 auto;
  min-width:0;
}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--pill);
  font-size:14.5px;
  letter-spacing:.02em;
  color:var(--steel);
  transition:color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(38,38,92,.6)}
.nav-link[aria-current="page"]{
  color:var(--paper);
  background:rgba(57,230,223,.12);
  box-shadow:inset 0 0 0 1px rgba(57,230,223,.36);
}
.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:3px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(57,230,223,0));
}
.nav-utility{
  display:flex;
  align-items:center;
  gap:14px;
  padding-left:18px;
  border-left:1px solid var(--line);
}
.nav-utility a{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(145,166,186,.88);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-utility a:hover{color:var(--cyan)}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}

.nav-toggle{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  width:42px;height:42px;
  padding:0;
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(38,38,92,.45);
  color:var(--paper);
  cursor:pointer;
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.nav-toggle:hover{border-color:rgba(57,230,223,.5)}
.nav-toggle-bar{
  display:block;
  width:17px;height:2px;
  border-radius:2px;
  background:var(--paper);
  transition:transform .28s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:absolute;
  left:10%;right:10%;
  bottom:-8px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--mint) 58%,var(--signal));
  transform:scaleX(0);
  transform-origin:0 50%;
  opacity:.9;
  pointer-events:none;
  will-change:transform;
}

/* ============================================================
   FOOTER — index plinth
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  border-top:1px solid var(--line);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 340px at 12% 0%,rgba(38,38,92,.55),transparent 70%),
    radial-gradient(760px 340px at 88% 6%,rgba(11,47,50,.62),transparent 70%),
    linear-gradient(180deg,rgba(8,19,33,.96),#050D16);
  color:rgba(245,241,232,.82);
}
.footer-inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(36px,5vw,72px) var(--gutter) clamp(20px,3vw,32px);
}
.footer-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px 28px;
  padding-bottom:clamp(20px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.footer-brandline{
  font-size:clamp(18px,2.6vw,30px);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.015em;
  color:var(--paper);
  max-width:22em;
}
.footer-meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--steel);
}
.dot{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(123,224,181,.14);
  flex:0 0 auto;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .8fr .8fr 1.5fr;
  gap:clamp(18px,3vw,40px);
  padding-block:clamp(24px,4vw,48px);
}
.footer-col{min-width:0}
.footer-col-brand .brand{margin-bottom:14px}
.brand-footer .brand-name{font-size:16px}
.footer-title{
  font-family:var(--mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.footer-list a{
  color:rgba(245,241,232,.78);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan);padding-left:4px}
.footer-note{
  margin-top:14px;
  max-width:27em;
  font-size:13px;
  line-height:1.7;
  color:var(--steel);
}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  line-height:1.6;
  color:rgba(245,241,232,.84);
}
.footer-contact li+li{margin-top:10px}
.contact-label{
  flex:0 0 46px;
  padding-top:3px;
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--steel);
}
.contact-value{flex:1 1 auto;word-break:break-word}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-top:clamp(16px,2.4vw,24px);
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--steel);
}
.footer-icp{font-size:12px;letter-spacing:.04em}
.footer-legal{font-size:12px;letter-spacing:.04em}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1180px){
  .nav-utility{display:none}
}

@media (max-width:1024px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-col-contact{grid-column:1 / -1}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .nav-island{padding-right:10px}
  .primary-nav{
    position:absolute;
    left:0;right:0;
    top:calc(100% + 10px);
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:14px;
    padding:16px;
    border:1px solid var(--line);
    border-radius:24px;
    background:linear-gradient(160deg,rgba(14,32,56,.99),rgba(11,47,50,.97));
    box-shadow:0 30px 64px -32px rgba(0,0,0,.98);
    max-height:calc(100vh - 140px);
    overflow-y:auto;
  }
  .site-header[data-open="true"] .primary-nav{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;flex-wrap:nowrap}
  .nav-link{display:block;padding:13px 15px;font-size:16px;border-radius:15px}
  .nav-link[aria-current="page"]::after{display:none}
  .nav-utility{
    display:flex;
    flex-wrap:wrap;
    gap:14px 22px;
    padding:14px 0 0;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .nav-utility a{font-size:11px}

  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col-contact{grid-column:1 / -1}
  .footer-head{align-items:flex-start}
  .grid-2,.grid-3{grid-template-columns:1fr}
}

@media (max-width:560px){
  .header-actions .btn{display:none}
  .brand-mark{width:34px;height:34px;border-radius:11px;font-size:10px}
  .brand-name{font-size:14px}
  .brand-sub{letter-spacing:.18em}
  .footer-grid{grid-template-columns:1fr}
  .footer-brandline{font-size:20px}
  .scroll-progress{left:6%;right:6%}
}

@media (max-width:380px){
  .brand-sub{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal-ready [data-reveal]{opacity:1 !important;transform:none !important}
  .card:hover{transform:none}
  .btn-signal:hover{transform:none}
}