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

/* ---------- tokens ---------- */
:root{
  color-scheme:dark;
  --bg-deep:#0B1F19;
  --bg-panel:#12302A;
  --bg-shadow:#06120E;
  --line:#1E443B;
  --cyan:#35F0D0;
  --orange:#FF7A2F;
  --violet:#8F7BFF;
  --grey:#9BB0AC;
  --bone:#F2EFE6;
  --yellow:#F5C451;

  --radius-xl:28px;
  --radius-lg:24px;
  --radius-md:18px;
  --radius-sm:12px;
  --radius-pill:999px;

  --maxw:1280px;
  --gutter:24px;
  --header-h:88px;

  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-display:"Arial Narrow","Helvetica Neue Condensed","Roboto Condensed","PingFang SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:240ms;
}

/* ---------- base ---------- */
html,body{min-height:100%}
body{
  background-color:var(--bg-deep);
  background-image:
    radial-gradient(1100px 520px at 88% -10%,rgba(53,240,208,.10),transparent 62%),
    radial-gradient(760px 420px at 4% 6%,rgba(143,123,255,.08),transparent 60%),
    repeating-linear-gradient(180deg,rgba(242,239,230,.022) 0 1px,transparent 1px 4px);
  background-attachment:fixed;
  color:var(--bone);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{line-height:1.2;font-weight:700;letter-spacing:.01em}
p{text-wrap:pretty}
::selection{background:var(--cyan);color:var(--bg-shadow)}
:where(a,button,summary,[tabindex]):focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- layout utils ---------- */
.shell{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-full{grid-column:1 / -1}
.band{
  background:linear-gradient(90deg,rgba(53,240,208,.10),rgba(143,123,255,.10) 52%,rgba(255,122,47,.10));
  border-block:1px solid var(--line);
  padding-block:24px;
}

/* ---------- typography ---------- */
.display-title{
  font-family:var(--font-display);
  font-size:clamp(34px,5.4vw,56px);
  font-weight:700;
  line-height:1.04;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.section-title{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.section-title::before{content:"";flex:0 0 auto;width:24px;height:2px;background:var(--cyan)}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--violet);
}
.num{
  font-family:var(--font-mono);
  font-size:1.4em;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
.prose{max-width:68ch;line-height:1.75}
.prose p + p{margin-top:1.2em}
.prose h2,.prose h3{margin-top:1.8em;margin-bottom:.6em}
.prose ul{list-style:disc;padding-left:1.3em;margin-top:.8em}
.prose li + li{margin-top:.4em}

/* ---------- buttons & chips ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  white-space:nowrap;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--signal{background:var(--orange);color:#08150F;border-color:var(--orange)}
.btn--signal:hover{transform:translateY(-1px);background:#FF8F52;border-color:#FF8F52}
.btn--ghost{background:transparent;color:var(--bone);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(155,176,172,.06);
  color:var(--grey);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  cursor:pointer;
  transition:background-color 120ms var(--ease),color 120ms var(--ease),border-color 120ms var(--ease),transform 120ms var(--ease);
}
.chip:hover{color:var(--bone);border-color:var(--cyan);transform:translateY(-1px)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--cyan);border-color:var(--cyan);color:var(--bg-shadow)}
.chip--violet{color:var(--violet);border-color:rgba(143,123,255,.45)}
.chip--violet[aria-pressed="true"],.chip--violet.is-active{background:var(--violet);border-color:var(--violet);color:var(--bg-shadow)}
.tag{
  display:inline-flex;
  align-items:center;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  border:1px solid var(--line);
  color:var(--grey);
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,240,208,.45);background:rgba(53,240,208,.08)}
.tag--violet{color:var(--violet);border-color:rgba(143,123,255,.45);background:rgba(143,123,255,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,122,47,.45);background:rgba(255,122,47,.08)}

/* ---------- panels ---------- */
.panel{
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:28px;
}
.panel--shadow{background:var(--bg-shadow)}
.panel + .panel{margin-top:20px}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--grey);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--grey);text-decoration:none}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--bone)}

/* ---------- fold ---------- */
.fold{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(18,48,42,.62);
  padding:0 20px;
}
.fold + .fold{margin-top:12px}
.fold summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 0;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{content:"+";font-family:var(--font-mono);font-size:18px;color:var(--cyan)}
.fold[open] summary::after{content:"–"}
.fold__body{padding-bottom:18px;color:var(--grey);line-height:1.75}

/* ---------- media frames ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:linear-gradient(140deg,var(--bg-panel),var(--bg-shadow));
  aspect-ratio:16 / 10;
  isolation:isolate;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.05);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,transparent 42%,rgba(6,18,14,.74)),
    repeating-linear-gradient(180deg,rgba(242,239,230,.05) 0 1px,transparent 1px 3px);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--slant{clip-path:polygon(0 0,100% 0,100% 86%,0 100%)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 16px;
  border-radius:var(--radius-pill);
  background:var(--cyan);
  color:var(--bg-shadow);
  font-size:13px;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-160%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,31,25,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  transition:background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(6,18,14,.97);
  box-shadow:0 16px 34px -26px #000;
}
.progress-rail{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(30,68,59,.55);
  overflow:hidden;
}
.progress-rail__fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--yellow) 62%,var(--orange));
}
.header-shell{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:var(--header-h);
  transition:min-height var(--dur) var(--ease);
}
.site-header[data-scrolled]{--header-h:56px}
.brand-slot{
  display:flex;
  align-items:center;
  gap:16px;
  flex:1 1 auto;
  min-width:0;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--bone);
  min-width:0;
}
.brand__mark{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:5px 9px;
  border-radius:10px;
  border:1px solid rgba(53,240,208,.38);
  background:rgba(53,240,208,.10);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--grey);
  white-space:nowrap;
  transition:opacity var(--dur) var(--ease);
}
.site-header[data-scrolled] .brand__sub{opacity:0}
.season-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(18,48,42,.7);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--grey);
  white-space:nowrap;
  transition:opacity var(--dur) var(--ease);
}
.site-header[data-scrolled] .season-chip{opacity:.6}
.season-chip__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(53,240,208,.16);
  animation:signal-pulse 2.4s var(--ease) infinite;
}
@keyframes signal-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(53,240,208,.16)}
  50%{box-shadow:0 0 0 7px rgba(53,240,208,.02)}
}
.nav-slot{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
}
.primary-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-link{
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  color:var(--grey);
  font-size:13px;
  letter-spacing:.03em;
  text-decoration:none;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--bone);background:rgba(53,240,208,.10);border-color:var(--line)}
.nav-link[aria-current="page"]{
  color:var(--bg-shadow);
  background:var(--cyan);
  border-color:var(--cyan);
  font-weight:700;
}
.header-cta{flex:0 0 auto}
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(53,240,208,.08);
  color:var(--bone);
  font-size:12px;
  letter-spacing:.08em;
  cursor:pointer;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  background:var(--cyan);
  transition:background-color 180ms var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  background:var(--cyan);
  transition:transform 180ms var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  background:var(--bg-shadow);
  border-top:1px solid var(--line);
  color:var(--grey);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:min(420px,60%);
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(53,240,208,0));
}
.footer-shell{padding-block:56px 28px}
.footer-top{
  display:grid;
  grid-template-columns:minmax(220px,1fr) 1.6fr;
  gap:48px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand__mark{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cyan);
  line-height:1;
  margin-bottom:14px;
}
.footer-brand__line{
  font-size:15px;
  line-height:1.7;
  color:rgba(242,239,230,.82);
  max-width:24ch;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px;
}
.footer-col__title{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--grey);
}
.footer-col__title::before{content:"";width:14px;height:2px;background:var(--violet)}
.footer-col__list{display:grid;gap:8px}
.footer-link{
  display:inline-block;
  color:rgba(242,239,230,.78);
  font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color 140ms var(--ease),border-color 140ms var(--ease);
}
.footer-link:hover{color:var(--cyan);border-bottom-color:rgba(53,240,208,.5)}
.footer-contact{
  margin-top:32px;
  padding:24px 26px;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:var(--bg-panel);
}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.footer-contact__list{display:grid;gap:10px}
.footer-contact__list li{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:12px;
  align-items:start;
  font-size:14px;
  line-height:1.65;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--grey);
  padding-top:3px;
}
.footer-contact__value{color:rgba(242,239,230,.88);word-break:break-word}
.footer-contact__note{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:13px;
  line-height:1.7;
  color:var(--grey);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px 24px;
  margin-top:28px;
  padding-top:20px;
  border-top:1px dashed var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:rgba(155,176,172,.85);
}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .season-chip{display:none}
  .nav-link{padding:8px 10px;font-size:12.5px}
  .header-shell{gap:14px}
}
@media (max-width:960px){
  :root{--gutter:20px}
  .site-header{--header-h:64px}
  .brand__sub{display:none}
  .nav-toggle{display:inline-flex;flex:0 0 auto}
  .nav-slot{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:70;
    display:flex;
    align-items:center;
    gap:12px;
    margin:0;
    padding:12px var(--gutter) calc(12px + env(safe-area-inset-bottom,0px));
    background:rgba(6,18,14,.97);
    border-top:1px solid var(--line);
    backdrop-filter:blur(14px);
    transform:translateY(calc(100% + 24px));
    transition:transform var(--dur) var(--ease);
  }
  .site-header[data-open] .nav-slot{transform:translateY(0)}
  .primary-nav{flex:1 1 auto;min-width:0}
  .nav-list{
    gap:8px;
    overflow-x:auto;
    padding-bottom:2px;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .nav-list::-webkit-scrollbar{display:none}
  .nav-link{
    padding:9px 14px;
    border-color:var(--line);
    background:rgba(18,48,42,.75);
    font-size:13px;
  }
  .header-cta{padding:9px 14px;font-size:12.5px}
  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:1 / -1}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .site-footer{margin-top:72px}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.75}
  :root{--gutter:16px}
  .brand__name{font-size:16px}
  .brand{gap:10px}
  .panel{padding:20px;border-radius:var(--radius-md)}
  .display-title{font-size:34px}
  .section-title{font-size:20px}
  .footer-shell{padding-block:40px 24px}
  .footer-nav{grid-template-columns:1fr;gap:22px}
  .footer-contact{padding:20px}
  .footer-contact__list li{grid-template-columns:1fr;gap:2px}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

/* ---------- 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;
  }
  .season-chip__dot{animation:none;box-shadow:0 0 0 3px rgba(53,240,208,.16)}
}