:root{
  --ink-900:#061422;
  --ink-800:#0B2036;
  --ink-700:#12304C;
  --cyan-400:#35E6D2;
  --cyan-200:#9BF6EE;
  --orange:#FF8A3D;
  --slate-400:#8FA6BD;
  --paper:#EEF3F7;
  --glass-white:rgba(233,242,250,.08);
  --line-cyan:rgba(53,230,210,.28);
  --line-soft:rgba(233,242,250,.12);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --radius-xs:4px;
  --radius-md:14px;
  --radius-lg:20px;
  --radius-pill:999px;

  --gap:20px;
  --wrap:1180px;
  --gutter:20px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --dur:240ms;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  scroll-padding-top:112px;
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}

body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;letter-spacing:-.01em;line-height:1.22}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:var(--cyan-200);text-decoration:none;text-underline-offset:.22em}
ul[class],ol[class]{margin:0;padding:0;list-style:none}

body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(233,242,250,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(233,242,250,.035) 1px,transparent 1px),
    radial-gradient(900px 520px at 84% -8%,rgba(53,230,210,.14),transparent 62%),
    radial-gradient(760px 480px at 2% 102%,rgba(255,138,61,.10),transparent 60%);
  background-size:72px 72px,72px 72px,auto,auto;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--cyan-400);color:var(--ink-900)}

:where(a,button,[tabindex],summary):focus-visible{
  outline:2px solid var(--cyan-400);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(53,230,210,.22);
}

.sr-only{
  position:absolute!important;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;
}

.wrap{width:min(calc(100% - 40px),var(--wrap));margin-inline:auto}
.prose{max-width:34em}
.prose p + p{margin-top:1em}

.section{padding-block:64px}
@media (min-width:768px){.section{padding-block:80px}}
@media (min-width:1100px){.section{padding-block:96px}}

.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;color:var(--cyan-400);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}

.lede{font-size:18px;line-height:1.85;color:var(--slate-400);max-width:34em}
@media (min-width:768px){.lede{font-size:20px}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  font-family:var(--font-body);font-size:15px;font-weight:600;line-height:1.2;
  text-decoration:none;border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--cyan-400);border-color:var(--cyan-400);color:#04202A}
.btn--primary:hover{background:var(--cyan-200);border-color:var(--cyan-200);color:#04202A}
.btn--ghost{background:var(--glass-white);border-color:var(--line-cyan);color:var(--paper);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.btn--ghost:hover{background:rgba(53,230,210,.16);border-color:var(--cyan-400);color:var(--cyan-200)}
.btn--signal{background:var(--orange);border-color:var(--orange);color:#2A1003}
.btn--signal:hover{background:#FFA05F;border-color:#FFA05F;color:#2A1003}

/* ---------- tags / cards ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border-radius:var(--radius-xs);
  border:1px solid var(--line-cyan);background:rgba(53,230,210,.08);
  color:var(--cyan-200);font-family:var(--font-mono);font-size:12px;
  letter-spacing:.02em;line-height:1.6;
}
.tag--orange{color:var(--orange);border-color:rgba(255,138,61,.38);background:rgba(255,138,61,.10)}

.card{
  position:relative;padding:24px;border-radius:var(--radius-md);
  background:var(--ink-700);border:1px solid var(--line-soft);color:var(--paper);
}
.card--glass{
  background:var(--glass-white);border:1px solid var(--line-cyan);
  border-radius:var(--radius-lg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(233,242,250,.14);
}
.card--paper{background:var(--paper);border-color:transparent;color:var(--ink-900)}
.card--paper a{color:var(--ink-700)}

/* ---------- grids ---------- */
.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:860px){.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}}

/* ---------- numeric anchors / signal bar ---------- */
.stat{display:block}
.stat__num{
  display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(38px,6vw,64px);line-height:1;letter-spacing:.02em;color:var(--cyan-200);
}
.stat__label{display:block;margin-top:8px;font-size:14px;color:var(--slate-400)}

.signal-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  padding:18px 22px;border-radius:var(--radius-lg);
  border:1px solid var(--line-cyan);
  background:linear-gradient(100deg,rgba(53,230,210,.14),rgba(6,20,34,0) 58%),var(--ink-800);
  font-size:14px;color:var(--slate-400);
}
.signal-bar__num{
  font-family:var(--font-mono);font-size:26px;line-height:1;
  letter-spacing:.02em;color:var(--cyan-400);
}

/* ---------- media placeholder ---------- */
.media{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--radius-lg);border:1px solid var(--line-cyan);
  background:linear-gradient(150deg,var(--ink-700),var(--ink-800) 70%,#0a1c30);
}
.media__frame{position:relative;width:100%;aspect-ratio:16/10;overflow:hidden}
.media__frame::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    repeating-linear-gradient(135deg,rgba(233,242,250,.07) 0 1px,transparent 1px 16px),
    radial-gradient(120% 90% at 78% 6%,rgba(53,230,210,.20),transparent 62%);
}
.media__img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media__glow{
  position:absolute;z-index:0;left:-15%;right:-15%;bottom:-42%;height:70%;
  background:radial-gradient(closest-side,rgba(255,138,61,.32),transparent 72%);
  filter:blur(26px);pointer-events:none;
}
.media__caption{
  position:absolute;z-index:2;left:14px;bottom:12px;
  padding:4px 10px;border-radius:var(--radius-xs);
  background:rgba(6,20,34,.78);border:1px solid var(--line-cyan);
  color:var(--cyan-200);font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;
}
.media--wide .media__frame{aspect-ratio:21/9}
.media--square .media__frame{aspect-ratio:1/1}
.media--tall .media__frame{aspect-ratio:3/4}
@media (max-width:640px){.media--wide .media__frame{aspect-ratio:16/10}}

/* ---------- breadcrumb ---------- */
.crumb{padding-block:18px 0;font-size:14px}
.crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb__item{display:inline-flex;align-items:center;gap:8px;color:var(--slate-400)}
.crumb__item + .crumb__item::before{content:"/";color:rgba(143,166,189,.5)}
.crumb__link{
  color:var(--slate-400);border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.crumb__link:hover{color:var(--paper);border-bottom-color:var(--line-cyan)}
.crumb__item[aria-current="page"]{color:var(--cyan-200)}

/* ---------- reveal ---------- */
.reveal-ready{opacity:0;transform:translateY(12px);transition:opacity 320ms var(--ease),transform 320ms var(--ease)}
.reveal-ready.is-visible{opacity:1;transform:none}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:100;
  background:rgba(233,242,250,.07);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan-400),var(--orange));
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:12px;left:50%;z-index:200;
  transform:translate(-50%,-180%);
  padding:10px 20px;border-radius:var(--radius-pill);
  background:var(--cyan-400);color:#04202A;font-weight:600;
  transition:transform 200ms var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

/* ================= HEADER ================= */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:18px 20px 0;
}
.site-header::before{
  content:"";position:absolute;left:0;right:0;top:0;
  height:calc(100% + 32px);z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,20,34,.96),rgba(6,20,34,.52) 56%,rgba(6,20,34,0));
}

.nav-shell{
  position:relative;
  width:min(100%,var(--wrap));margin-inline:auto;
  display:flex;align-items:center;gap:18px;
  padding:12px 14px 12px 22px;
  border-radius:var(--radius-pill);
  background:rgba(11,32,54,.72);
  border:1px solid var(--line-cyan);
  backdrop-filter:blur(14px) saturate(125%);
  -webkit-backdrop-filter:blur(14px) saturate(125%);
  box-shadow:0 18px 44px -26px rgba(0,0,0,.9),inset 0 1px 0 rgba(233,242,250,.09);
  transition:padding var(--dur) var(--ease),background-color var(--dur) var(--ease),max-width var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] .nav-shell{
  max-width:min(calc(100% - 8px),980px);
  padding:9px 12px 9px 20px;
  background:rgba(6,20,34,.92);
  box-shadow:0 22px 50px -30px rgba(0,0,0,.95),inset 0 1px 0 rgba(233,242,250,.07);
}

.brand-mark{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;color:var(--paper);text-decoration:none;
  font-size:18px;font-weight:600;letter-spacing:-.01em;line-height:1.1;
  border-radius:var(--radius-pill);
}
.brand-mark__glyph{
  position:relative;flex:0 0 auto;width:26px;height:26px;border-radius:9px;
  background:var(--ink-800);border:1px solid var(--line-cyan);
  box-shadow:inset 0 0 12px rgba(53,230,210,.32);
  transition:border-color var(--dur) var(--ease);
}
.brand-mark__glyph::after{
  content:"";position:absolute;left:6px;right:6px;bottom:7px;height:3px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan-400) 0 62%,var(--orange) 62% 100%);
}
.brand-mark:hover .brand-mark__glyph{border-color:var(--cyan-400)}
.brand-mark__name{white-space:nowrap}

.nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:0}
.nav-item{display:flex}
.nav-link{
  display:inline-block;padding:9px 12px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;color:var(--slate-400);white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--paper);background-color:rgba(233,242,250,.07)}
.nav-link[aria-current="page"]{color:#04202A;background-color:var(--cyan-200);font-weight:600}

.nav-tail{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-status{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border-radius:var(--radius-pill);
  border:1px solid var(--line-cyan);background:rgba(53,230,210,.06);
  font-family:var(--font-mono);font-size:12px;line-height:1.4;
  letter-spacing:.02em;color:var(--cyan-200);white-space:nowrap;
}
.status-lamp{
  width:8px;height:8px;flex:0 0 auto;border-radius:50%;
  background:var(--cyan-400);
  animation:status-pulse 2.4s var(--ease) infinite;
}
@keyframes status-pulse{
  0%{box-shadow:0 0 0 0 rgba(53,230,210,.55)}
  70%{box-shadow:0 0 0 9px rgba(53,230,210,0)}
  100%{box-shadow:0 0 0 0 rgba(53,230,210,0)}
}
.nav-status__text{letter-spacing:.02em}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--line-cyan);background:var(--glass-white);
  font-size:14px;font-weight:500;color:var(--paper);cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:background-color 160ms linear;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:transform 200ms var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle:hover{border-color:var(--cyan-400);color:var(--cyan-200)}
.nav-toggle[aria-expanded="true"]{background:var(--cyan-400);border-color:var(--cyan-400);color:#04202A}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

@media (max-width:1180px){
  .nav-shell{gap:12px;padding:11px 12px 11px 18px}
  .nav-link{padding:8px 10px;font-size:14px}
  .btn.nav-cta{padding:10px 16px;font-size:14px}
}

@media (max-width:980px){
  .site-header{padding:12px 12px 0}
  .nav-shell{padding:10px 10px 10px 16px;gap:8px}
  .site-header[data-scrolled="true"] .nav-shell{max-width:100%;padding:8px 8px 8px 14px}
  .brand-mark{font-size:16px}
  .nav-tail{order:2;margin-left:auto;gap:8px}
  .nav-status{padding:6px 9px;font-size:11px}
  .btn.nav-cta{padding:9px 13px;font-size:13px}
  .nav-toggle{display:inline-flex;order:3}

  .nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;z-index:5;
    display:block;flex:none;
    max-height:calc(100vh - 170px);overflow-y:auto;
    padding:10px;
    border-radius:var(--radius-lg);
    border:1px solid var(--line-cyan);
    background:rgba(6,20,34,.97);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    box-shadow:0 30px 64px -34px #000;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 0s linear 220ms;
  }
  .nav[data-open="true"]{
    opacity:1;visibility:visible;transform:none;
    transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 0s linear 0s;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-item{display:block}
  .nav-link{display:block;padding:13px 16px;border-radius:var(--radius-md);font-size:16px}
  .nav-link[aria-current="page"]{background:var(--cyan-200);color:#04202A}
}

@media (max-width:560px){
  .nav-toggle__label{display:none}
  .nav-toggle{padding:9px 11px}
  .brand-mark{font-size:15px}
  .btn.nav-cta{padding:8px 11px;font-size:12px}
  .nav-status{padding:6px 7px}
}

/* ================= FOOTER ================= */
.site-footer{
  position:relative;
  margin-top:96px;
  padding:64px 0 32px;
  border-top:1px solid var(--line-cyan);
  background:
    radial-gradient(680px 320px at 88% 0%,rgba(53,230,210,.10),transparent 68%),
    linear-gradient(180deg,var(--ink-800),#08182a 58%,#050f1b);
  color:var(--slate-400);
  font-size:15px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:2px;
  background:linear-gradient(90deg,var(--cyan-400),rgba(53,230,210,0) 46%,var(--orange));
  opacity:.9;
}

.footer-grid{
  width:min(calc(100% - 40px),var(--wrap));margin-inline:auto;
  display:grid;gap:40px 32px;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.25fr);
}

.footer-brand{display:grid;gap:14px;align-content:start}
.brand-mark--footer{font-size:20px;color:var(--paper)}
.footer-tagline{font-size:15px;line-height:1.7;color:var(--slate-400)}
.footer-anchor{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;color:var(--cyan-400);
}
.footer-anchor .mono{font-size:15px}
.footer-dot{color:rgba(143,166,189,.6)}

.footer-col{min-width:0}
.footer-heading{
  margin:0 0 16px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;color:var(--cyan-400);
}
.footer-list{display:grid;gap:11px;font-size:15px;line-height:1.6}
.footer-list--plain{gap:9px}
.footer-list--plain li{display:flex;flex-wrap:wrap;align-items:baseline;gap:2px 0;word-break:break-word}
.footer-label{
  display:inline-block;min-width:2.6em;margin-right:8px;flex:0 0 auto;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:rgba(143,166,189,.72);
}
.footer-link{
  display:inline-flex;align-items:center;
  color:var(--slate-400);
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan-200)}
.footer-link--quiet{font-size:13px}

.footer-bottom{
  width:min(calc(100% - 40px),var(--wrap));margin:44px auto 0;padding-top:22px;
  border-top:1px solid rgba(233,242,250,.1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 24px;font-size:13px;color:rgba(143,166,189,.85);
}
.footer-copy{line-height:1.7}
.footer-icp{color:var(--cyan-200)}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}

.to-top{
  position:fixed;right:18px;bottom:18px;z-index:95;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--radius-pill);cursor:pointer;
  border:1px solid var(--line-cyan);
  background:rgba(11,32,54,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  color:var(--cyan-200);font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 0s linear 220ms,background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top[data-visible="true"]{
  opacity:1;visibility:visible;transform:none;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 0s linear 0s,background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top:hover{background:var(--cyan-400);border-color:var(--cyan-400);color:#04202A}
.to-top__arrow{font-size:14px;line-height:1}

@media (max-width:980px){
  .site-footer{padding:52px 0 28px;margin-top:72px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:34px 24px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{margin-top:36px}
}
@media (max-width:560px){
  .site-footer{padding:44px 0 26px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .to-top{right:12px;bottom:12px;padding:9px 13px}
}

@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;
  }
  .reveal-ready{opacity:1;transform:none}
  .status-lamp{animation:none;box-shadow:0 0 0 3px rgba(53,230,210,.28)}
  .to-top[data-visible="false"]{transform:none}
}