:root{
  --ink:#071C16;
  --ink-2:#0E2A22;
  --ink-3:#0B241D;
  --cyan:#39F5D0;
  --amber:#F2B84B;
  --white:#F4F8F5;
  --paper:#F1E6CF;
  --rust:#E4572E;
  --muted:#7C9A90;
  --brown:#1A1511;
  --line:rgba(57,245,208,.16);
  --line-soft:rgba(244,248,245,.10);
  --rail-w:88px;
  --bar-h:64px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  background:var(--ink);
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,picture,svg,video{max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}

/* ---------- base ---------- */
body{
  position:relative;
  min-height:100vh;
  padding-top:var(--bar-h);
  background:transparent;
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(120% 80% at 88% -12%,rgba(57,245,208,.14),transparent 58%),
    radial-gradient(90% 70% at -10% 108%,rgba(242,184,75,.09),transparent 55%),
    linear-gradient(180deg,#08201A,#071C16 60%,#061814);
}
::selection{background:var(--cyan);color:#052A22}
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
html.nav-open{overflow:hidden}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:300;
  padding:10px 16px;
  background:var(--cyan);
  color:#052A22;
  font-weight:800;
  font-size:13px;
  letter-spacing:.04em;
  text-decoration:none;
  border-radius:2px;
  transform:translateY(-200%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header : mobile command bar ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:120;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:var(--bar-h);
  padding:10px 14px;
  background:rgba(7,28,22,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  flex:1 1 auto;
  min-width:0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-width:0;
  color:var(--white);
  text-decoration:none;
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  flex:none;
  width:32px;
  height:32px;
  border:1.5px solid rgba(57,245,208,.75);
  border-radius:50%;
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:4px;
  border:1px solid rgba(57,245,208,.22);
  border-radius:50%;
}
.brand-mark-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 0 4px rgba(242,184,75,.16);
}
.brand:hover .brand-mark{border-color:var(--cyan);transform:rotate(90deg)}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1.1;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:15px;
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:9px;
  letter-spacing:.28em;
  color:var(--muted);
  white-space:nowrap;
}
.header-actions{display:flex;align-items:center;gap:8px;flex:none}

.pulse-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 9px;
  border:1px solid rgba(242,184,75,.35);
  border-radius:2px;
  background:rgba(242,184,75,.07);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
  text-decoration:none;
  white-space:nowrap;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.pulse-badge:hover{background:rgba(242,184,75,.16);border-color:var(--amber)}
.pulse-dot{
  position:relative;
  flex:none;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--amber);
}
.pulse-dot::after{
  content:"";
  position:absolute;
  inset:-3px;
  border:1px solid rgba(242,184,75,.55);
  border-radius:50%;
  animation:pulse-ring 2.4s ease-out infinite;
}
@keyframes pulse-ring{
  0%{transform:scale(.5);opacity:.9}
  70%{transform:scale(1.7);opacity:0}
  100%{transform:scale(1.7);opacity:0}
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:36px;
  padding:8px 10px;
  background:rgba(57,245,208,.06);
  border:1px solid rgba(57,245,208,.35);
  border-radius:2px;
  color:var(--white);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(57,245,208,.14);border-color:var(--cyan)}
.nav-toggle-bars{position:relative;display:block;flex:none;width:16px;height:10px}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:var(--cyan);
  transition:transform .22s var(--ease),opacity .18s var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.site-header[data-open="true"] .nav-toggle-bars::before{transform:translateY(4px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

/* ---------- nav drawer : mobile ---------- */
.site-nav{
  position:fixed;
  top:var(--bar-h);
  left:0;
  right:0;
  z-index:110;
  max-height:calc(100vh - var(--bar-h));
  max-height:calc(100dvh - var(--bar-h));
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:18px 18px 24px;
  background:linear-gradient(180deg,#0C2A22,#08201A);
  border-bottom:1px solid var(--line);
  box-shadow:0 30px 70px rgba(0,0,0,.55);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
  opacity:0;
  visibility:hidden;
  transform:translateY(-12px);
  transition:opacity .2s var(--ease),transform .24s var(--ease),visibility .24s linear;
}
.site-header[data-open="true"] .site-nav{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.nav-caption{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.28em;
  color:var(--muted);
}
.nav-list{display:flex;flex-direction:column;gap:2px}
.nav-list a{
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 12px 12px 10px;
  border-left:2px solid transparent;
  color:rgba(244,248,245,.78);
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  letter-spacing:.01em;
  text-decoration:none;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease);
}
.nav-list a:hover{color:var(--white);background:rgba(57,245,208,.06)}
.nav-list a[aria-current="page"]{
  color:var(--cyan);
  background:rgba(57,245,208,.10);
  border-left-color:var(--cyan);
}
.nav-num{
  flex:none;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--muted);
}
.nav-list a[aria-current="page"] .nav-num{color:var(--cyan)}
.nav-word{display:block}
.nav-foot{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed rgba(124,154,144,.32);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--muted);
}

/* ---------- scroll meter ---------- */
.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.scroll-meter-fill{
  --progress:0;
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transform:scaleX(var(--progress));
  transform-origin:left center;
  transition:transform .1s linear;
}

/* ---------- header : desktop rail ---------- */
@media (min-width:960px){
  body{padding-top:0;padding-left:var(--rail-w)}
  .site-header{
    top:0;
    left:0;
    right:auto;
    bottom:0;
    width:var(--rail-w);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:16px 0 14px;
    background:linear-gradient(180deg,#0B241D 0%,#071C16 55%,#061813 100%);
    border-bottom:0;
    border-right:1px solid var(--line);
  }
  .header-bar{display:contents}
  .brand{
    order:1;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding:0 6px;
  }
  .brand-mark{width:34px;height:34px}
  .brand-text{align-items:center}
  .brand-name{font-size:12px;letter-spacing:.06em}
  .brand-sub{font-size:8px;letter-spacing:.2em}

  .site-nav{
    position:static;
    order:2;
    flex:1 1 auto;
    min-height:0;
    max-height:none;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:14px;
    overflow-y:auto;
    overflow-x:hidden;
    padding:20px 0 10px;
    background:transparent;
    border:0;
    box-shadow:none;
    clip-path:none;
    opacity:1;
    visibility:visible;
    transform:none;
    scrollbar-width:none;
  }
  .site-nav::-webkit-scrollbar{display:none}
  .nav-caption{
    margin:0;
    writing-mode:vertical-rl;
    font-size:9px;
    letter-spacing:.34em;
  }
  .nav-list{display:flex;flex-direction:column;align-items:center;gap:12px}
  .nav-list a{
    padding:2px 0;
    border-left:0;
    border-radius:0;
    writing-mode:vertical-rl;
    font-size:13px;
    letter-spacing:.18em;
    line-height:1.2;
    color:rgba(244,248,245,.72);
    background:transparent;
    transition:color .18s var(--ease),text-shadow .18s var(--ease);
  }
  .nav-list a:hover{color:var(--white);background:transparent;text-shadow:0 0 18px rgba(57,245,208,.45)}
  .nav-list a[aria-current="page"]{
    color:var(--cyan);
    background:transparent;
    border-left:0;
    text-shadow:0 0 20px rgba(57,245,208,.5);
  }
  .nav-num{display:none}
  .nav-foot{
    margin:0;
    padding-top:12px;
    border-top:0;
    border-left:0;
    writing-mode:vertical-rl;
    font-size:9px;
    letter-spacing:.24em;
    color:rgba(124,154,144,.7);
  }

  .header-actions{
    order:3;
    flex-direction:column;
    align-items:center;
    gap:12px;
    width:100%;
    padding-top:12px;
    border-top:1px solid var(--line);
  }
  .nav-toggle{display:none}
  .pulse-badge{flex-direction:row;align-items:flex-start;gap:7px;padding:8px 6px;font-size:9px;letter-spacing:.2em}
  .pulse-dot{margin-top:2px}
  .pulse-text{writing-mode:vertical-rl;line-height:1.1}
  .sub-switch{padding:8px 8px;font-size:11px;letter-spacing:.04em}

  .scroll-meter{
    left:auto;
    right:-1px;
    top:0;
    bottom:0;
    width:2px;
    height:auto;
  }
  .scroll-meter-fill{
    background:linear-gradient(180deg,var(--cyan),var(--amber));
    transform:scaleY(var(--progress));
    transform-origin:center top;
  }
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,112px);
  padding-top:clamp(36px,6vw,64px);
  overflow:hidden;
  color:rgba(244,248,245,.72);
  background:
    radial-gradient(120% 100% at 10% 0%,rgba(57,245,208,.10),transparent 58%),
    var(--brown);
  border-top:1px solid rgba(57,245,208,.22);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(57,245,208,.08) 42%,var(--amber));
  opacity:.85;
}
.footer-glow{
  position:absolute;
  top:-70px;
  right:-80px;
  width:300px;
  height:300px;
  border-radius:50%;
  pointer-events:none;
  background:radial-gradient(circle,rgba(57,245,208,.16),transparent 70%);
}
.footer-inner{
  position:relative;
  display:grid;
  gap:32px;
  padding-bottom:clamp(28px,4vw,44px);
}
.footer-brand{min-width:0}
.footer-logo{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.5rem,3vw,2.1rem);
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--white);
}
.footer-tagline{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--cyan);
}
.footer-note{
  margin-top:14px;
  max-width:30ch;
  font-size:13px;
  line-height:1.7;
  color:rgba(244,248,245,.55);
}
.footer-nav{display:flex;flex-wrap:wrap;gap:28px}
.footer-col{min-width:118px}
.footer-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{
  font-size:14px;
  color:rgba(244,248,245,.8);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-contact{min-width:0}
.footer-mono{
  margin-bottom:8px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  letter-spacing:.03em;
  color:var(--white);
  word-break:break-word;
}
.footer-text{
  margin-bottom:6px;
  font-size:13px;
  line-height:1.7;
  color:rgba(244,248,245,.6);
}
.footer-base{
  position:relative;
  padding:16px 0;
  background:rgba(0,0,0,.24);
  border-top:1px solid rgba(244,248,245,.12);
}
.footer-base-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(244,248,245,.5);
}
.footer-icp{color:rgba(244,248,245,.58)}
@media (min-width:760px){
  .footer-inner{grid-template-columns:1.3fr 1.1fr 1fr;gap:36px}
}
@media (min-width:1100px){
  .footer-inner{grid-template-columns:1.4fr 1.2fr 1fr}
}

/* ---------- layout utilities ---------- */
.wrap{
  width:min(1180px,calc(100% - 32px));
  margin-inline:auto;
}
@media (min-width:960px){
  .wrap{width:min(1180px,calc(100% - 72px))}
}
.section{padding:clamp(44px,7vw,92px) 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:clamp(20px,3vw,34px);
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
@media (min-width:720px){
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1000px){
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- typography ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.4rem,5vw,5.2rem);
  line-height:1.02;
  letter-spacing:-.02em;
  color:var(--white);
}
.h2{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.5rem,2.6vw,2.3rem);
  line-height:1.15;
  letter-spacing:-.01em;
  color:var(--white);
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.lede{
  max-width:42ch;
  font-size:clamp(15px,1.4vw,17px);
  line-height:1.75;
  color:rgba(244,248,245,.78);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- breadcrumbs ---------- */
.crumbs{margin:26px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:rgba(124,154,144,.5)}
.crumbs a{color:var(--muted);text-decoration:none;transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:rgba(244,248,245,.82)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--amber);color:#241A05}
.btn-primary:hover{background:#FFCB63;transform:translateY(-2px)}
.btn-ghost{
  background:rgba(57,245,208,.06);
  border-color:rgba(57,245,208,.4);
  color:var(--cyan);
}
.btn-ghost:hover{background:rgba(57,245,208,.15);border-color:var(--cyan);transform:translateY(-2px)}
.btn-sm{padding:9px 14px;font-size:12px;letter-spacing:.08em}

/* ---------- tags / cards ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 8px;
  border:1px solid currentColor;
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--cyan);
}
.tag-amber{color:var(--amber)}
.tag-rust{color:var(--rust)}
.card{
  padding:22px;
  background:rgba(14,42,34,.72);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%);
}
.card-paper{
  background:var(--paper);
  border-color:#D8C8A8;
  color:#16241F;
}
.card-paper .eyebrow,
.card-paper .mono{color:#5B4A2A}

/* ---------- media containers ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  background:
    radial-gradient(90% 90% at 78% 12%,rgba(57,245,208,.20),transparent 62%),
    linear-gradient(160deg,#0E2A22,#071C16 70%);
  border:1px solid var(--line);
  border-radius:2px;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    repeating-linear-gradient(90deg,rgba(244,248,245,.05) 0 1px,transparent 1px 26px),
    repeating-linear-gradient(0deg,rgba(244,248,245,.05) 0 1px,transparent 1px 26px),
    linear-gradient(200deg,rgba(242,184,75,.10),transparent 55%);
  mix-blend-mode:screen;
}
.media img,
.media picture,
.media svg,
.media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-16x9{aspect-ratio:16/9}
.media-4x3{aspect-ratio:4/3}
.media-1x1{aspect-ratio:1/1}
.media-3x4{aspect-ratio:3/4}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
}

/* ---------- fold (accordion) ---------- */
.fold{
  margin-bottom:10px;
  background:rgba(14,42,34,.6);
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
}
.fold-btn{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  width:100%;
  padding:16px 18px;
  background:transparent;
  border:0;
  color:var(--white);
  font-family:var(--font-display);
  font-weight:800;
  font-size:15px;
  line-height:1.4;
  text-align:left;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.fold-btn:hover{background:rgba(57,245,208,.07)}
.fold-btn::after{
  content:"+";
  flex:none;
  font-family:var(--font-mono);
  font-size:18px;
  line-height:1;
  color:var(--cyan);
  transition:transform .22s var(--ease);
}
.fold-btn[aria-expanded="true"]::after{transform:rotate(45deg)}
.fold-panel{
  padding:0 18px 18px;
  font-size:14px;
  line-height:1.7;
  color:rgba(244,248,245,.76);
}
.fold-panel[hidden]{display:none}

/* ---------- reveal ---------- */
.reveal-ready [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal-ready [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ---------- small screens ---------- */
@media (max-width:479px){
  .site-header{padding:10px 12px;gap:8px}
  .brand-mark{width:28px;height:28px}
  .brand-name{font-size:14px}
  .brand-sub{display:none}
  .pulse-badge{font-size:9px;padding:5px 7px}
  .sub-switch{padding:8px 10px;font-size:11px}
  .nav-toggle-word{display:none}
  .nav-toggle{padding:8px;min-height:34px}
}

/* ---------- reduced motion ---------- */
@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;transform:none}
  .scroll-meter-fill{transition:none}
}