:root{
  --ink:#0A1128;
  --ink-deep:#070D1E;
  --teal:#0E2A38;
  --indigo:#2B2160;
  --wine:#7A1F3D;
  --cyan:#34E0E8;
  --flame:#FF7A2F;
  --paper:#F4F7FB;
  --slate:#8FA6BD;
  --green:#43D69B;
  --magenta:#E5528F;
  --sun:#FFD166;
  --line:rgba(143,166,189,.18);
  --line-strong:rgba(52,224,232,.34);
  --radius-xl:32px;
  --radius-lg:24px;
  --radius-md:18px;
  --pill:999px;
  --shell:1280px;
  --gutter:clamp(16px,4vw,40px);
  --display:"HarmonyOS Sans SC Condensed","Noto Sans SC","PingFang SC",sans-serif;
  --body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",monospace;
  --shadow-panel:0 30px 70px -40px rgba(3,7,20,.95);
}

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

body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 12% -8%,rgba(43,33,96,.55),transparent 46%),
    radial-gradient(circle at 92% 2%,rgba(14,42,56,.85),transparent 42%),
    linear-gradient(180deg,#0A1128 0%,#081020 58%,#070D1E 100%);
  color:var(--paper);
  font-family:var(--body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-family:var(--display);font-weight:300;line-height:1.14;letter-spacing:-.005em}
h1{font-size:clamp(34px,5.4vw,64px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(19px,2.1vw,24px);font-weight:500;line-height:1.32}
h4{font-size:17px;font-weight:600;line-height:1.4}

p{max-width:78ch}
strong{font-weight:600;color:var(--paper)}

:where(a,button,summary):focus-visible{
  outline:2px solid var(--flame);
  outline-offset:3px;
  border-radius:8px;
}
#main-content:focus-visible{outline:2px solid var(--cyan);outline-offset:-6px}

/* ---------- layout ---------- */
.shell{
  width:min(calc(100% - var(--gutter) * 2),var(--shell));
  margin-inline:auto;
}
.section{padding-block:clamp(48px,7vw,96px)}
.section-head{display:grid;gap:12px;margin-bottom:clamp(20px,3vw,36px)}
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section-title{
  font-family:var(--display);
  font-weight:300;
  font-size:clamp(28px,4vw,44px);
  line-height:1.12;
  letter-spacing:-.01em;
}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.8;color:var(--slate);max-width:64ch}

.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- buttons & pills ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:11px 22px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--body);
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.08em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn--pulse{
  background:linear-gradient(135deg,var(--flame) 0%,#FFA15E 100%);
  color:#1C0C03;
  box-shadow:0 14px 30px -16px rgba(255,122,47,.85);
}
.btn--pulse:hover{transform:translateY(-1px);box-shadow:0 18px 34px -16px rgba(255,122,47,.95)}
.btn--ghost{
  background:rgba(52,224,232,.06);
  border-color:var(--line-strong);
  color:var(--cyan);
}
.btn--ghost:hover{background:rgba(52,224,232,.14);transform:translateY(-1px)}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 13px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.12em;
  line-height:1.5;
  white-space:nowrap;
}
.pill--cyan{color:var(--cyan);border-color:rgba(52,224,232,.4);background:rgba(52,224,232,.08)}
.pill--flame{color:var(--flame);border-color:rgba(255,122,47,.42);background:rgba(255,122,47,.08)}
.pill--green{color:var(--green);border-color:rgba(67,214,155,.42);background:rgba(67,214,155,.08)}

/* ---------- stats ---------- */
.stat{display:flex;flex-direction:column;gap:4px;min-width:0}
.stat__num{
  font-family:var(--mono);
  font-weight:700;
  font-size:clamp(30px,4.6vw,54px);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--paper);
  font-variant-numeric:tabular-nums;
}
.stat__label{font-size:13px;letter-spacing:.06em;color:var(--slate)}

/* ---------- panels ---------- */
.panel{
  background:linear-gradient(158deg,rgba(14,42,56,.96),rgba(10,17,40,.96));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(20px,2.6vw,32px);
  box-shadow:var(--shadow-panel);
  min-width:0;
}
.stack-panel{
  position:relative;
  background:linear-gradient(150deg,var(--teal),#0A1A26 70%,#08131F 100%);
  border:1px solid var(--line);
  border-radius:var(--radius-xl);
  padding:clamp(24px,4vw,56px);
  overflow:hidden;
  box-shadow:var(--shadow-panel);
}
.stack-panel--indigo{background:linear-gradient(150deg,#2B2160,#171036 74%,#0D0A24 100%)}
.stack-panel--wine{background:linear-gradient(150deg,#7A1F3D,#3A0F1F 72%,#210912 100%)}
.stack-panel--paper{
  background:linear-gradient(150deg,#F4F7FB,#DDE6F1 100%);
  color:#0E1A2C;
  border-color:rgba(10,17,40,.12);
}
.stack-panel--paper .lede,
.stack-panel--paper .stat__label{color:#42546B}
.stack-panel--paper .stat__num{color:#0A1128}

/* ---------- media ---------- */
.media{
  display:block;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:
    radial-gradient(circle at 28% 22%,rgba(52,224,232,.16),transparent 58%),
    linear-gradient(150deg,#0E2A38,#0A1128);
}
.media__frame{
  position:relative;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
}
.media__frame img,
.media__frame svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide .media__frame{aspect-ratio:21 / 9}
.media--square .media__frame{aspect-ratio:1 / 1}
.media--tall .media__frame{aspect-ratio:4 / 5}
.media__caption{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 12px;
  padding:12px 16px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:clamp(18px,3vw,30px) 0}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px}
.breadcrumb__item{display:flex;align-items:center;gap:8px;color:var(--slate)}
.breadcrumb__item:not(:last-child)::after{content:"/";color:rgba(143,166,189,.45)}
.breadcrumb__link{color:var(--slate);text-decoration:none;transition:color .2s ease}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__current{color:var(--paper)}

/* ---------- prose ---------- */
.prose{max-width:72ch;color:var(--slate);font-size:16.5px;line-height:1.85}
.prose h2{
  color:var(--paper);
  font-family:var(--display);
  font-weight:400;
  font-size:clamp(22px,2.6vw,30px);
  margin:2em 0 .6em;
}
.prose h3{color:var(--paper);font-size:18px;font-weight:600;margin:1.7em 0 .5em}
.prose p{margin-bottom:1em}
.prose ul{margin:0 0 1.2em;padding-left:1.15em;list-style:disc}
.prose li{margin-bottom:.45em}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose strong{color:var(--paper)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}

/* ---------- disclosure ---------- */
.disclosure{border-top:1px solid var(--line)}
.disclosure__trigger{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  width:100%;
  padding:18px 2px;
  background:none;
  border:0;
  color:var(--paper);
  font-family:var(--body);
  font-size:16.5px;
  font-weight:500;
  line-height:1.5;
  text-align:left;
  cursor:pointer;
  transition:color .2s ease;
}
.disclosure__trigger:hover{color:var(--cyan)}
.disclosure__sign{
  position:relative;
  flex:0 0 auto;
  width:24px;
  height:24px;
  border:1px solid var(--line-strong);
  border-radius:50%;
  transition:background-color .2s ease,border-color .2s ease;
}
.disclosure__sign::before,
.disclosure__sign::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:9px;
  height:1.5px;
  border-radius:2px;
  background:var(--cyan);
  transform:translate(-50%,-50%);
  transition:transform .24s ease;
}
.disclosure__sign::after{transform:translate(-50%,-50%) rotate(90deg)}
.disclosure[data-expanded="true"] .disclosure__sign{background:rgba(52,224,232,.12);border-color:var(--cyan)}
.disclosure[data-expanded="true"] .disclosure__sign::after{transform:translate(-50%,-50%) rotate(0deg)}
.disclosure__panel{padding:0 0 22px;color:var(--slate);font-size:15.5px;line-height:1.85}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:220;
  padding:12px 22px;
  border-radius:var(--pill);
  background:var(--cyan);
  color:#04121A;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{
  position:relative;
  z-index:80;
  background:rgba(7,13,30,.92);
  border-bottom:1px solid var(--line);
  color:var(--paper);
}
.header-rail{
  background:linear-gradient(90deg,rgba(14,42,56,.96),rgba(43,33,96,.5) 62%,rgba(14,42,56,.9));
  border-bottom:1px solid rgba(52,224,232,.14);
}
.header-rail__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 18px;
  min-height:38px;
  padding-block:7px;
}
.header-rail__status{display:flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:.08em;color:var(--paper)}
.header-rail__pulse{
  flex:0 0 auto;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 0 rgba(67,214,155,.55);
  animation:rail-pulse 2.6s ease-out infinite;
}
.header-rail__text{color:rgba(244,247,251,.92);letter-spacing:.05em}
.header-rail__meta{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--slate);
  max-width:none;
}
@keyframes rail-pulse{
  0%{box-shadow:0 0 0 0 rgba(67,214,155,.55)}
  70%{box-shadow:0 0 0 9px rgba(67,214,155,0)}
  100%{box-shadow:0 0 0 0 rgba(67,214,155,0)}
}

.masthead{padding-bottom:2px}
.masthead__inner{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding-block:16px 0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--paper);
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:34px;
  height:34px;
  border-radius:50%;
  background:conic-gradient(from 40deg,var(--cyan),var(--flame),var(--indigo),var(--cyan));
  box-shadow:0 0 0 1px rgba(52,224,232,.35),0 0 22px -6px rgba(52,224,232,.6);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:50%;
  background:var(--ink-deep);
}
.brand__word{
  font-family:var(--display);
  font-size:clamp(20px,2.6vw,28px);
  font-weight:600;
  letter-spacing:.16em;
  line-height:1.1;
}
.brand__tag{
  padding-left:12px;
  border-left:1px solid var(--line);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--slate);
  white-space:nowrap;
}
.masthead__nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:12px 22px;
  width:100%;
  padding-bottom:14px;
}
.masthead__actions{display:flex;align-items:center;gap:10px}
.masthead__actions .btn{padding:9px 20px;font-size:13px}

.nav-toggle{
  position:absolute;
  top:10px;
  right:0;
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border:1px solid var(--line-strong);
  border-radius:var(--pill);
  background:rgba(52,224,232,.07);
  color:var(--cyan);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(52,224,232,.14)}
.nav-toggle__label{line-height:1}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars i{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .22s ease,opacity .22s ease;
}
.site-header[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.site-nav{display:block}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-block;
  padding:9px 15px;
  border-radius:var(--pill);
  font-size:13.5px;
  letter-spacing:.1em;
  color:var(--slate);
  text-decoration:none;
  transition:color .2s ease,background-color .2s ease;
}
.site-nav__link:hover{color:var(--paper);background:rgba(52,224,232,.1)}
.site-nav__link[aria-current="page"]{
  color:#04121A;
  background:var(--cyan);
  font-weight:700;
  box-shadow:0 10px 26px -16px rgba(52,224,232,.9);
}

.scroll-meter{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  z-index:210;
  background:linear-gradient(90deg,var(--cyan),#5BE9C0 42%,var(--flame));
  box-shadow:0 0 12px rgba(52,224,232,.55);
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  isolation:isolate;
  margin-top:clamp(56px,9vw,130px);
  padding-block:clamp(44px,6vw,84px) 22px;
  background:linear-gradient(180deg,rgba(8,16,32,0) 0%,rgba(14,42,56,.9) 36%,#0A1128 100%);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--flame),transparent);
  opacity:.6;
}
.site-footer::after{
  content:"";
  position:absolute;
  z-index:-1;
  left:50%;
  bottom:-280px;
  width:min(1120px,125vw);
  aspect-ratio:2 / 1;
  transform:translateX(-50%);
  border:1px solid rgba(52,224,232,.14);
  border-radius:50%;
  pointer-events:none;
}
.footer__glow{
  position:absolute;
  z-index:-1;
  top:-42%;
  right:-16%;
  width:min(720px,92vw);
  aspect-ratio:1 / 1;
  border-radius:50%;
  background:radial-gradient(circle,rgba(52,224,232,.16),transparent 62%);
  pointer-events:none;
}
.footer__top{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.9fr);
  gap:clamp(32px,5vw,64px);
  align-items:start;
}
.footer__brand{max-width:42ch;min-width:0}
.footer__wordmark{
  font-family:var(--display);
  font-weight:300;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.05;
  letter-spacing:.06em;
  color:var(--paper);
  max-width:none;
}
.footer__note{margin-top:16px;font-size:15px;line-height:1.8;color:var(--slate)}
.footer__badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.footer__grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer__col{min-width:0}
.footer__col-title{
  margin-bottom:14px;
  font-family:var(--mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer__links{display:grid;gap:9px}
.footer__link{
  font-size:15px;
  color:var(--slate);
  text-decoration:none;
  transition:color .2s ease;
}
.footer__link:hover{
  color:var(--paper);
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:var(--cyan);
  text-decoration-thickness:1px;
}
.footer__contact{display:grid;gap:10px}
.contact-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  font-size:14px;
}
.contact-row__key{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--slate);
}
.contact-row__val{color:var(--paper);word-break:break-word;line-height:1.6}
.footer__hint{margin-top:14px;font-size:12.5px;line-height:1.75;color:var(--slate);max-width:36ch}
.footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-top:clamp(28px,4vw,48px);
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--slate);
}
.footer__legal{margin:0;max-width:none;letter-spacing:.03em}
.to-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 18px;
  border:1px solid var(--line-strong);
  border-radius:var(--pill);
  background:transparent;
  color:var(--cyan);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:background-color .2s ease,transform .2s ease;
}
.to-top::after{content:"↑";font-size:13px}
.to-top:hover{background:rgba(52,224,232,.14);transform:translateY(-1px)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__top{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .masthead__inner{padding-block:16px 0}
  .masthead__nav{flex-direction:column;align-items:stretch;gap:0;padding-bottom:12px}
  .site-nav{display:none;width:100%;padding-top:6px}
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:13px 16px;
    border-radius:14px;
    font-size:15.5px;
    letter-spacing:.03em;
    border-bottom:1px solid rgba(143,166,189,.12);
  }
  .site-nav__item:last-child .site-nav__link{border-bottom:0}
  .masthead__actions{width:100%;padding-block:14px 4px}
  .masthead__actions .btn{width:100%;justify-content:center}
}

@media (max-width:760px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__col--contact{grid-column:1 / -1}
  .footer__hint{max-width:46ch}
}

@media (max-width:700px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:640px){
  body{font-size:16.5px}
  .brand__tag{display:none}
  .header-rail__meta{display:none}
  .header-rail__inner{min-height:34px}
}

@media (max-width:520px){
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .to-top{width:100%;justify-content:center}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .header-rail__pulse{animation:none;box-shadow:none}
}