*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(68px + 16px)}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,address{margin:0}
address{font-style:normal}
ul,ol{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:where(h1,h2,h3,h4){text-wrap:balance}

:root{
  --ink-deep:#06120F;
  --ink-panel:#0C1F1A;
  --ink-moss:#123028;
  --line-struct:#1E4A3E;
  --line-dim:#7A8B85;
  --amber:#E3A94B;
  --amber-soft:#F2C879;
  --cyan:#37E0D0;
  --mist:#B9C4BF;
  --paper:#E8EEEA;

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

  --maxw:1320px;
  --pad-x:clamp(18px,3.6vw,48px);
  --frame-h:68px;
  --rail-w:56px;
  --dur:180ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-lift:0 18px 44px -24px rgba(0,0,0,.92);
}

body{
  min-height:100vh;
  background:var(--ink-deep);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(232,238,234,.020) 0 1px,transparent 1px 8px),
    repeating-linear-gradient(90deg,rgba(232,238,234,.014) 0 1px,transparent 1px 8px);
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--paper);
}
h1{font-size:clamp(2.6rem,7.5vw,6.4rem)}
h2{font-size:clamp(1.75rem,3.6vw,2.8rem)}
h3{font-size:clamp(1.25rem,2vw,1.6rem)}
p{max-width:38em}

::selection{background:var(--amber);color:var(--ink-deep)}

:focus-visible{
  outline:3px solid var(--amber);
  outline-offset:2px;
  box-shadow:inset 0 0 0 1px var(--ink-deep);
}

/* ---------- utilities ---------- */
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.sr-only{
  position:absolute;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;
  clip-path:inset(50%);white-space:nowrap;border:0;
}
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad-x);
  position:relative;
  z-index:1;
}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--split{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,4fr);
  gap:clamp(20px,3.2vw,48px);
  align-items:start;
}
.panel{
  background:var(--ink-panel);
  border:1px solid var(--line-struct);
  padding:clamp(20px,2.6vw,32px);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.panel:hover,.panel:focus-within{
  transform:translateY(-3px);
  border-color:var(--amber);
  background:var(--ink-moss);
  box-shadow:var(--shadow-lift);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.2;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  padding:6px 0;
  border-top:1px solid var(--amber);
  border-bottom:1px solid var(--amber);
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.5;
  letter-spacing:.08em;
  color:var(--mist);
  background:var(--ink-moss);
  border:1px solid var(--line-struct);
}
.tag--amber{color:var(--amber);border-color:rgba(227,169,75,.55);background:rgba(227,169,75,.09)}
.tag--cyan{color:var(--cyan);border-color:rgba(55,224,208,.5);background:rgba(55,224,208,.08)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid var(--amber);
  border-radius:0;
  background:transparent;
  color:var(--amber);
  font-family:var(--font-body);
  font-size:.9375rem;
  font-weight:700;
  letter-spacing:.04em;
  line-height:1.2;
  text-decoration:none;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{background:rgba(227,169,75,.14);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--amber{background:var(--amber);color:var(--ink-deep);border-color:var(--amber)}
.btn--amber:hover{background:var(--amber-soft);border-color:var(--amber-soft);color:var(--ink-deep)}
.btn--sm{padding:9px 15px;font-size:.8125rem;letter-spacing:.06em}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  top:0;
  left:-9999px;
  z-index:999;
  padding:12px 18px;
  background:var(--amber);
  color:var(--ink-deep);
  font-weight:700;
  text-decoration:none;
}
.skip-link:focus{left:12px;top:12px}

/* ---------- left rail ---------- */
.site-rail{
  display:none;
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--rail-w);
  z-index:55;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:calc(var(--frame-h) + 26px) 0 26px;
  background:linear-gradient(180deg,var(--ink-deep) 0%,#081814 55%,var(--ink-deep) 100%);
  border-right:1px solid var(--line-struct);
  pointer-events:none;
}
.site-rail__ticks{
  width:14px;
  height:96px;
  background-image:repeating-linear-gradient(180deg,var(--line-struct) 0 1px,transparent 1px 8px);
}
.site-rail__ticks--flip{opacity:.6}
.site-rail__label{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1;
  letter-spacing:.42em;
  text-transform:uppercase;
  color:var(--amber);
  opacity:.85;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(6,18,15,.94);
  border-bottom:1px solid var(--line-struct);
  -webkit-backdrop-filter:blur(12px) saturate(125%);
  backdrop-filter:blur(12px) saturate(125%);
}
.site-header::before{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  pointer-events:none;
  background:linear-gradient(90deg,transparent 0%,var(--amber) 14%,transparent 46%,var(--cyan) 82%,transparent 100%);
  opacity:.5;
}
.site-header__bar{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,26px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  min-height:var(--frame-h);
  padding-inline:var(--pad-x);
}

/* brand */
.brand{
  display:inline-flex;
  flex-direction:column;
  gap:3px;
  flex:0 0 auto;
  padding:10px 0;
  text-decoration:none;
}
.brand__mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(16px,1.5vw,20px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--paper);
  transition:color var(--dur) var(--ease);
}
.brand__tag{
  font-family:var(--font-mono);
  font-size:10px;
  line-height:1;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber);
}
.brand:hover .brand__mark{color:var(--amber-soft)}
.brand--footer .brand__mark{font-size:clamp(20px,2.2vw,26px)}

/* nav */
.site-nav{margin-left:auto}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(2px,.9vw,18px);
}
.site-nav__list a{
  position:relative;
  display:inline-block;
  padding:22px 9px;
  font-size:.9375rem;
  font-weight:500;
  line-height:1.2;
  color:var(--mist);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.site-nav__list a::before{
  content:attr(data-idx);
  position:absolute;
  top:9px;
  left:9px;
  font-family:var(--font-mono);
  font-size:9px;
  line-height:1;
  letter-spacing:.12em;
  color:var(--line-dim);
  transition:color var(--dur) var(--ease);
}
.site-nav__list a::after{
  content:"";
  position:absolute;
  left:9px;right:9px;bottom:8px;
  height:2px;
  background:var(--amber);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.site-nav__list a:hover{color:var(--paper)}
.site-nav__list a:hover::before{color:var(--amber)}
.site-nav__list a:hover::after{transform:scaleX(.55)}
.site-nav__list a[aria-current="page"]{color:var(--amber-soft)}
.site-nav__list a[aria-current="page"]::before{color:var(--amber)}
.site-nav__list a[aria-current="page"]::after{transform:scaleX(1)}

/* header tools */
.site-header__tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  margin-left:6px;
}
.lang-tag{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1;
  letter-spacing:.14em;
  color:var(--mist);
  border:1px solid var(--line-struct);
  padding:5px 8px;
}

/* nav toggle */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  height:40px;
  padding:0 12px;
  border:1px solid var(--line-struct);
  color:var(--paper);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--amber);color:var(--amber-soft)}
.nav-toggle__txt{
  font-family:var(--font-mono);
  font-size:.8125rem;
  line-height:1;
  letter-spacing:.08em;
  white-space:nowrap;
}
.nav-toggle__icon{
  position:relative;
  display:block;
  width:18px;
  height:1.5px;
  background:currentColor;
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle__icon::before,
.nav-toggle__icon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:1.5px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle__icon::before{top:-6px}
.nav-toggle__icon::after{top:6px}
.site-header[data-open] .nav-toggle{border-color:var(--amber);color:var(--amber-soft)}
.site-header[data-open] .nav-toggle__icon{background:transparent}
.site-header[data-open] .nav-toggle__icon::before{top:0;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__icon::after{top:0;transform:rotate(-45deg)}

/* scroll progress */
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(30,74,62,.55);
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber) 0%,var(--amber-soft) 45%,var(--cyan) 100%);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  padding:18px 0 6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--line-dim);
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:var(--line-struct)}
.breadcrumbs a{color:var(--mist);transition:color var(--dur) var(--ease)}
.breadcrumbs a:hover{color:var(--amber)}
.breadcrumbs [aria-current="page"]{color:var(--amber-soft)}

/* ---------- image containers ---------- */
.figure{margin:0;display:flex;flex-direction:column;gap:10px}
.figure__media{
  position:relative;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--ink-moss);
  border:1px solid var(--line-struct);
}
.figure__media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,rgba(6,18,15,.22) 0%,rgba(6,18,15,.72) 100%),
    radial-gradient(circle at 72% 18%,rgba(227,169,75,.20) 0%,transparent 58%),
    radial-gradient(circle at 12% 88%,rgba(55,224,208,.12) 0%,transparent 52%);
}
.figure__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.82) contrast(1.05);
}
.figure--wide .figure__media{aspect-ratio:21/9}
.figure--tall .figure__media{aspect-ratio:4/5}
.figure__caption{
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.05em;
  color:var(--line-dim);
}

/* ---------- reveal protocol ---------- */
[data-reveal].is-pending{opacity:0;transform:translateY(12px)}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
  transition:opacity 400ms var(--ease),transform 400ms var(--ease);
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(64px,10vw,140px);
  border-top:1px solid rgba(227,169,75,.55);
  background:linear-gradient(180deg,rgba(12,31,26,.92) 0%,var(--ink-deep) 62%);
}
.site-footer__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.site-footer__brandrow{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px 40px;
  padding:clamp(36px,5vw,60px) 0 clamp(24px,3.4vw,36px);
  border-bottom:1px solid var(--line-struct);
}
.footer-brand__note{
  max-width:42ch;
  font-size:.9375rem;
  line-height:1.75;
  color:var(--mist);
}
.site-footer__cols{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(22px,3.4vw,52px);
  padding:clamp(30px,4.4vw,52px) 0 clamp(26px,3.6vw,40px);
}
.footer-col__title{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line-struct);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  line-height:1.2;
  letter-spacing:.16em;
  color:var(--amber);
  text-transform:uppercase;
}
.footer-col__index{
  font-size:10px;
  letter-spacing:.1em;
  color:var(--line-dim);
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col li a{
  display:inline-flex;
  align-items:center;
  gap:0;
  font-size:.9375rem;
  line-height:1.5;
  color:var(--mist);
  transition:color var(--dur) var(--ease),gap var(--dur) var(--ease);
}
.footer-col li a::before{
  content:"";
  width:0;
  height:1px;
  background:var(--amber);
  transition:width var(--dur) var(--ease),margin-right var(--dur) var(--ease);
}
.footer-col li a:hover,.footer-col li a:focus-visible{
  color:var(--paper);
  gap:10px;
}
.footer-col li a:hover::before,.footer-col li a:focus-visible::before{width:14px}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__row{
  display:grid;
  grid-template-columns:3.4em minmax(0,1fr);
  gap:8px;
  font-size:.9375rem;
  line-height:1.6;
  color:var(--mist);
  overflow-wrap:anywhere;
}
.footer-contact__key{
  font-size:10px;
  letter-spacing:.14em;
  line-height:1.9;
  color:var(--line-dim);
}
.site-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding:16px 0;
  border-top:1px solid rgba(30,74,62,.85);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.05em;
  color:var(--line-dim);
}
.site-footer__legal-links{
  display:inline-flex;
  flex-wrap:wrap;
  gap:16px;
  margin-left:auto;
}
.site-footer__legal-links a{
  color:var(--mist);
  border-bottom:1px solid var(--line-struct);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-footer__legal-links a:hover{color:var(--amber);border-color:var(--amber)}
.site-footer__contact{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding:16px 0 clamp(28px,4vw,44px);
  font-size:.875rem;
  line-height:1.7;
  color:var(--mist);
}
.site-footer__copy{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--line-dim);
}

/* ---------- responsive ---------- */
@media (min-width:1080px){
  body{padding-left:var(--rail-w)}
  .site-rail{display:flex}
}

@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .lang-tag{display:none}
  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:none;
    max-height:calc(100vh - var(--frame-h));
    overflow-y:auto;
    padding:6px var(--pad-x) 22px;
    background:var(--ink-panel);
    border-top:1px solid var(--line-struct);
    border-bottom:1px solid var(--line-struct);
    box-shadow:0 26px 54px -20px rgba(0,0,0,.9);
  }
  .site-header[data-open] .site-nav,
  .site-nav[data-open]{display:block}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__list li + li{border-top:1px solid rgba(30,74,62,.65)}
  .site-nav__list a{
    display:flex;
    align-items:center;
    gap:14px;
    padding:16px 4px 16px 16px;
    font-size:1.0625rem;
    color:var(--paper);
  }
  .site-nav__list a::before{
    position:static;
    width:2.4ch;
    font-size:11px;
    color:var(--line-dim);
  }
  .site-nav__list a::after{
    left:0;right:auto;bottom:auto;
    top:0;
    width:2px;
    height:100%;
    transform:scaleY(0);
    transform-origin:top center;
  }
  .site-nav__list a:hover::after{transform:scaleY(.6)}
  .site-nav__list a[aria-current="page"]::after{transform:scaleY(1)}
  .grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:900px){
  .site-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__legal-links{margin-left:0}
}

@media (max-width:560px){
  :root{--frame-h:62px}
  .brand__tag{display:none}
  .site-header__tools{gap:8px}
  .btn--sm{padding:8px 11px;font-size:.75rem;letter-spacing:.02em}
  .nav-toggle{padding:0 9px;height:38px;gap:8px}
  .nav-toggle__txt{display:none}
  .site-footer__cols{grid-template-columns:minmax(0,1fr)}
  .site-footer__brandrow{padding-top:32px}
  .figure--wide .figure__media{aspect-ratio:16/9}
}

@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;
  }
}