*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;padding:0;overflow-x:hidden}
img,svg,video{max-width:100%;display:block}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
main{display:block}
[hidden]{display:none !important}

:root{
  --ink:#0B1F3A;
  --ink-panel:#122E52;
  --ink-deep:#071324;
  --paper:#F3E9D7;
  --paper-line:#D9C9AA;
  --ink-text:#1A2233;
  --gold:#E8B339;
  --cyan:#2FA8A0;
  --red:#C94A4A;
  --green:#4E9B63;
  --yellow:#F2C94C;
  --white:#F7F4EC;
  --star:#8FA6BF;
  --line:rgba(247,244,236,.14);
  --line-gold:rgba(232,179,57,.32);
  --shell:1240px;
  --gutter:2.5rem;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:22px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Source Han Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --fs-xs:.75rem;
  --fs-sm:.875rem;
  --fs-base:1.0625rem;
  --fs-md:1.25rem;
  --fs-lg:1.5rem;
  --fs-xl:1.9375rem;
  --fs-2xl:2.4375rem;
  --fs-3xl:clamp(2rem,4vw,3.8rem);
}

body{
  font-family:var(--font-sans);
  font-size:var(--fs-base);
  line-height:1.75;
  color:var(--white);
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 12% 6%,rgba(47,168,160,.16),transparent 46%),
    radial-gradient(circle at 88% 2%,rgba(232,179,57,.13),transparent 42%),
    radial-gradient(circle at 62% 98%,rgba(18,46,82,.92),transparent 62%);
  background-attachment:fixed;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(143,166,191,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,166,191,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%,#000 18%,transparent 78%);
  mask-image:radial-gradient(circle at 50% 26%,#000 18%,transparent 78%);
}

.site-header,.site-footer,main{position:relative;z-index:1}

h1,h2,h3,h4{font-weight:900;line-height:1.2;letter-spacing:-.01em;margin-bottom:.6em}
h1{font-size:var(--fs-3xl)}
h2{font-size:clamp(1.5rem,2.6vw,var(--fs-2xl))}
h3{font-size:clamp(1.15rem,1.6vw,var(--fs-lg));font-weight:800}
p{margin-bottom:1em}

.shell{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin-inline:auto;
}

.section{padding:3.5rem 0}
.section-head{max-width:70ch;margin-bottom:1.75rem}
.section-title{margin-bottom:.35em}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin-bottom:.75rem;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor}
.lede{font-size:1.08rem;line-height:1.8;color:rgba(247,244,236,.82);max-width:64ch}
.prose{max-width:68ch;line-height:1.9}
.note{
  margin:1.5rem 0;
  padding:.85rem 1.1rem;
  border-left:2px solid var(--gold);
  border-radius:0 var(--radius-s) var(--radius-s) 0;
  background:rgba(18,46,82,.55);
  color:rgba(247,244,236,.86);
  font-size:.95rem;
}
.note p:last-child{margin-bottom:0}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.7rem 1.15rem;
  border:1px solid transparent;
  border-radius:999px;
  font-size:.92rem;
  font-weight:800;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-primary{background:var(--gold);border-color:var(--gold);color:#0B1F3A}
.btn-primary:hover{background:var(--yellow);border-color:var(--yellow)}
.btn-ghost{background:transparent;border-color:var(--line-gold);color:var(--gold)}
.btn-ghost:hover{background:rgba(232,179,57,.14);color:var(--white)}
.btn:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.18rem .6rem;
  border:1px solid var(--line-gold);
  border-radius:999px;
  background:rgba(232,179,57,.09);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.06em;
}
.tag--cyan{color:#5FD3CB;border-color:rgba(47,168,160,.5);background:rgba(47,168,160,.12)}
.tag--red{color:#F09292;border-color:rgba(201,74,74,.52);background:rgba(201,74,74,.14)}
.tag--green{color:#87CE9A;border-color:rgba(78,155,99,.52);background:rgba(78,155,99,.14)}

.breadcrumb{margin-bottom:1.1rem;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.04em;color:var(--star)}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:.45rem}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:.45rem}
.breadcrumb-list li+li::before{content:"/";color:rgba(143,166,191,.5)}
.breadcrumb-link{color:rgba(247,244,236,.72)}
.breadcrumb-link:hover{color:var(--gold)}
.breadcrumb-current{color:var(--white)}

.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:1rem}
.bento>*{min-width:0}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}
.col-12{grid-column:span 12}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.card{
  position:relative;
  padding:1.35rem;
  border:1px solid rgba(143,166,191,.22);
  border-radius:var(--radius-m);
  background:linear-gradient(160deg,rgba(18,46,82,.92),rgba(9,24,44,.92));
  color:var(--white);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.card:hover{border-color:var(--line-gold);box-shadow:0 18px 40px -32px rgba(0,0,0,.95)}
.card--paper{
  background:linear-gradient(165deg,#F7F1E4,var(--paper));
  border-color:var(--paper-line);
  color:var(--ink-text);
}
.card-kicker{
  display:block;
  margin-bottom:.5rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gold);
}
.card--paper .card-kicker{color:#8A6A1F}
.card-title{margin-bottom:.5rem;font-size:var(--fs-md);font-weight:800;line-height:1.35}
.card-body{font-size:.96rem;color:rgba(247,244,236,.8)}
.card--paper .card-body{color:rgba(26,34,51,.78)}
.card-body p:last-child{margin-bottom:0}
.data-num{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:1.5rem;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--gold);
}
.card--paper .data-num{color:#8A6A1F}

.figure{
  position:relative;
  margin:0;
  overflow:hidden;
  border:1px solid var(--line-gold);
  border-radius:var(--radius-m);
  background:linear-gradient(160deg,#0E2547,#081729);
}
.figure img{width:100%;height:100%;object-fit:cover;filter:brightness(.82) saturate(.92);transition:filter .24s ease}
.figure:hover img{filter:brightness(.88) saturate(1)}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,19,36,0) 52%,rgba(7,19,36,.72));
}
.figure-ratio-16x9{aspect-ratio:16/9}
.figure-ratio-4x3{aspect-ratio:4/3}
.figure-ratio-1x1{aspect-ratio:1/1}
.figure-ratio-3x4{aspect-ratio:3/4}
.figure-placeholder{
  display:grid;
  place-items:center;
  width:100%;
  height:100%;
  min-height:120px;
  color:rgba(143,166,191,.75);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  background-image:
    linear-gradient(rgba(143,166,191,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(143,166,191,.14) 1px,transparent 1px);
  background-size:26px 26px;
}
.figure-caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:.85rem 1rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--paper);
}

/* ===== Header ===== */
.site-header{
  position:relative;
  z-index:30;
  color:var(--white);
  border-bottom:1px solid var(--line-gold);
  background:linear-gradient(180deg,rgba(9,24,44,.98),rgba(11,31,58,.94));
  box-shadow:0 22px 48px -36px rgba(0,0,0,.95);
}
.skip-link{
  position:absolute;
  left:1rem;
  top:-5rem;
  z-index:999;
  padding:.65rem 1.15rem;
  border-radius:0 0 10px 10px;
  background:var(--gold);
  color:#0B1F3A;
  font-weight:800;
  transition:top .18s ease;
}
.skip-link:focus-visible{top:0;outline:3px solid var(--white);outline-offset:2px}

.header-utility{
  background:rgba(7,19,36,.7);
  border-bottom:1px solid var(--line);
}
.header-utility-inner{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.4rem;
  min-height:42px;
  padding:.35rem 0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--star);
}
.brand-note{
  margin:0;
  display:inline-flex;
  align-items:center;
  color:rgba(247,244,236,.74);
  letter-spacing:.12em;
}
.brand-note::before{
  content:"";
  display:inline-block;
  width:20px;
  height:2px;
  margin-right:.55rem;
  background:linear-gradient(90deg,var(--cyan),var(--white) 30%,var(--red) 55%,var(--green) 78%,var(--yellow));
}
.version-switch{
  display:inline-flex;
  gap:2px;
  padding:2px;
  border:1px solid var(--line-gold);
  border-radius:999px;
  background:rgba(11,31,58,.78);
}
.version-btn{
  appearance:none;
  border:0;
  cursor:pointer;
  padding:.26rem .82rem;
  border-radius:999px;
  background:transparent;
  color:var(--star);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  transition:background .18s ease,color .18s ease;
}
.version-btn:hover{color:var(--white);background:rgba(247,244,236,.1)}
.version-btn[aria-pressed="true"]{background:var(--gold);color:#0B1F3A;font-weight:700}
.version-btn:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.signal{
  margin:0 0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  color:rgba(143,166,191,.9);
  white-space:nowrap;
}
.signal time{color:var(--paper);font-family:var(--font-mono)}
.signal-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 0 rgba(47,168,160,.55);
  animation:signal-pulse 2.4s ease-out infinite;
}
@keyframes signal-pulse{
  0%{box-shadow:0 0 0 0 rgba(47,168,160,.5)}
  70%{box-shadow:0 0 0 8px rgba(47,168,160,0)}
  100%{box-shadow:0 0 0 0 rgba(47,168,160,0)}
}

.header-main-inner{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin-inline:auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:1rem 1.5rem;
  padding:.85rem 0;
  position:relative;
}
.brand{display:inline-flex;align-items:center;gap:.7rem;flex-shrink:0}
.brand-mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--gold),#C08F26);
  color:#0B1F3A;
  font-size:1.2rem;
  font-weight:900;
  box-shadow:0 10px 24px -14px rgba(232,179,57,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:1.06rem;font-weight:900;letter-spacing:.02em}
.brand-sub{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;color:var(--star);text-transform:uppercase}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  margin-left:auto;
  padding:.5rem .9rem;
  border:1px solid var(--line-gold);
  border-radius:999px;
  background:rgba(18,46,82,.75);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  cursor:pointer;
}
.nav-toggle:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.nav-toggle-icon{
  position:relative;
  display:inline-block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background .18s ease;
}
.nav-toggle-icon::before,
.nav-toggle-icon::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .18s ease;
}
.nav-toggle-icon::before{top:-5px}
.nav-toggle-icon::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{transform:translateY(-5px) rotate(-45deg)}

.site-nav{
  display:flex;
  align-items:center;
  gap:1.1rem;
  margin-left:auto;
}
.nav-list{display:flex;flex-wrap:wrap;align-items:center;gap:.15rem}
.nav-item{display:block}
.nav-link{
  display:block;
  padding:.42rem .62rem;
  border-bottom:2px solid transparent;
  border-radius:6px;
  font-size:.9rem;
  color:rgba(247,244,236,.78);
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.nav-link:hover{color:var(--white);background:rgba(247,244,236,.07)}
.nav-link:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.nav-link[aria-current="page"]{color:var(--gold);border-bottom-color:var(--gold);font-weight:700}
.nav-cta{flex-shrink:0;padding:.55rem 1rem;font-size:.86rem}

/* ===== Footer ===== */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:4.5rem;
  padding:3.5rem 0 1.75rem;
  border-top:1px solid var(--line-gold);
  color:rgba(247,244,236,.82);
  background:
    radial-gradient(circle at 88% 0%,rgba(232,179,57,.12),transparent 56%),
    radial-gradient(circle at 8% 12%,rgba(47,168,160,.1),transparent 50%),
    linear-gradient(180deg,#0A1B32,#061020);
}
.footer-top{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(260px,1.1fr) minmax(0,2fr);
  gap:2.25rem;
  align-items:start;
}
.footer-brand .brand{margin-bottom:1rem}
.footer-tagline{
  max-width:34ch;
  margin:0;
  font-size:.96rem;
  line-height:1.85;
  color:rgba(247,244,236,.7);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1.5rem;
}
.footer-col-title{
  margin-bottom:.75rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
}
.footer-list{display:grid;gap:.45rem}
.footer-link{
  display:inline-block;
  font-size:.94rem;
  color:rgba(247,244,236,.8);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--gold);border-bottom-color:var(--line-gold)}
.footer-link:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

.footer-contact{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin:2.5rem auto 0;
  padding-top:1.5rem;
  border-top:1px solid var(--line);
  display:grid;
  gap:.6rem;
}
.contact-line{
  margin:0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem .75rem;
  font-size:.92rem;
}
.contact-label{
  min-width:4.6rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--star);
}
.contact-value{
  font-family:var(--font-mono);
  color:var(--white);
  word-break:break-word;
}
.copy-chip{
  appearance:none;
  cursor:pointer;
  padding:.18rem .68rem;
  border:1px solid var(--line-gold);
  border-radius:999px;
  background:rgba(232,179,57,.1);
  color:var(--gold);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  transition:background .18s ease,color .18s ease;
}
.copy-chip:hover{background:var(--gold);color:#0B1F3A}
.copy-chip:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.copy-feedback{
  display:inline-block;
  min-width:4rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:#87CE9A;
}

.footer-legal{
  width:min(var(--shell),calc(100% - var(--gutter)));
  margin:2rem auto 0;
  padding-top:1.25rem;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.75rem 1.5rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.05em;
  color:var(--star);
}
.footer-icp{margin:0}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:1rem;margin:0}

/* ===== Utilities ===== */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:999;
  width:100%;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--gold) 55%,var(--red));
  pointer-events:none;
}
[data-reveal]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8,.col-9{grid-column:span 12}
}
@media (max-width:900px){
  :root{--gutter:1.75rem}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    flex-basis:100%;
    flex-direction:column;
    align-items:stretch;
    gap:.85rem;
    margin-left:0;
    padding:.75rem 0 1rem;
    border-top:1px solid var(--line);
  }
  .site-nav[data-open]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:.1rem}
  .nav-link{
    padding:.7rem .5rem;
    border-bottom:1px solid rgba(247,244,236,.09);
    border-radius:0;
  }
  .nav-link[aria-current="page"]{border-bottom-color:rgba(232,179,57,.5);background:rgba(232,179,57,.08)}
  .nav-cta{align-self:flex-start}
  .signal{margin-left:0}
  .footer-top{grid-template-columns:1fr}
  .section{padding:2.75rem 0}
}
@media (max-width:640px){
  :root{--gutter:1.25rem;--fs-base:1rem}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .header-utility-inner{font-size:.68rem;gap:.45rem .9rem}
  .brand-note{width:100%}
  .version-switch{margin-left:0}
  .brand-mark{width:38px;height:38px;font-size:1.05rem}
  .brand-name{font-size:1rem}
  .footer-legal{font-size:.68rem}
  .contact-label{min-width:100%}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .signal-dot{animation:none;box-shadow:0 0 0 3px rgba(47,168,160,.22)}
}