:root{
  --ink:#061826;
  --ink-deep:#04121c;
  --deck:#0B2434;
  --deck-hi:#0F3044;
  --rock:#2B3E4A;
  --paper:#E8EFF4;
  --paper-dim:#B3C6D2;
  --muted:#6E8798;
  --cyan:#25D8F0;
  --cyan-soft:rgba(37,216,240,.12);
  --orange:#FF7A1A;
  --lime:#7CFF6B;
  --moss:#5E7C6A;
  --clay:#B76E4E;
  --alert:#FF4D5E;
  --line:rgba(43,62,74,.95);
  --line-soft:rgba(43,62,74,.6);
  --wrap:1280px;
  --gutter:clamp(16px,3vw,32px);
  --gap:24px;
  --font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(43,62,74,.28) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(43,62,74,.28) 1px,transparent 1px);
  background-size:72px 72px;
  background-position:center top;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:28px;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img,svg,video{max-width:100%;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7BECF9;}
ul,ol{margin:0;padding-left:1.25em;}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.08;letter-spacing:.02em;color:var(--paper);margin:0 0 .5em;}
h1{font-size:clamp(38px,5.6vw,64px);}
h2{font-size:clamp(26px,3.4vw,44px);}
h3{font-size:clamp(20px,2.2vw,28px);}
h4{font-size:clamp(17px,1.6vw,20px);}
p{margin:0 0 1.15em;color:var(--paper-dim);}
strong{color:var(--paper);font-weight:700;}
#main-content{display:block;outline:none;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}
.skip-link{
  position:absolute;left:12px;top:12px;z-index:300;
  transform:translateY(-180%);
  padding:10px 18px;background:var(--cyan);color:#04121c;
  font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0);color:#04121c;}
.scroll-progress{
  position:fixed;top:0;left:0;width:100%;height:2px;z-index:120;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  pointer-events:none;
}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);}
.mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--paper-dim);}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px;}
/* ---------- dots ---------- */
.dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--lime);box-shadow:0 0 0 3px rgba(124,255,107,.16);
  vertical-align:middle;flex:0 0 auto;
  animation:pulse 2.8s ease-in-out infinite;
}
.dot--cyan{background:var(--cyan);box-shadow:0 0 0 3px rgba(37,216,240,.16);}
.dot--orange{background:var(--orange);box-shadow:0 0 0 3px rgba(255,122,26,.16);}
.dot--alert{background:var(--alert);box-shadow:0 0 0 3px rgba(255,77,94,.18);}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.42;transform:scale(.8);}}
/* ---------- header ---------- */
.site-header{position:relative;z-index:40;background:var(--ink);}
.header-strip{
  background:linear-gradient(90deg,rgba(37,216,240,.09),rgba(6,24,38,0) 46%,rgba(255,122,26,.08));
  border-bottom:1px solid var(--line-soft);
}
.strip-inner{display:flex;align-items:center;gap:20px;min-height:38px;}
.strip-tag{
  display:inline-flex;align-items:center;gap:7px;white-space:nowrap;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--muted);
}
.strip-tag b{color:var(--lime);font-weight:500;letter-spacing:.1em;}
.strip-tag--mono{color:var(--paper-dim);}
.strip-tag--end{margin-left:auto;}
.masthead{
  background:
    radial-gradient(140% 170% at 50% -50%,rgba(37,216,240,.18) 0%,rgba(6,24,38,0) 62%),
    var(--ink);
  border-bottom:1px solid var(--line);
}
.masthead-inner{
  display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;gap:24px;
  padding-top:clamp(18px,2.4vw,30px);padding-bottom:clamp(18px,2.4vw,30px);
}
.masthead-aside{display:flex;flex-direction:column;align-items:flex-start;gap:10px;min-width:0;}
.masthead-aside--end{align-items:flex-end;text-align:right;}
.masthead-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--muted);}
.masthead-mono{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--paper-dim);}
.brand{display:inline-flex;flex-direction:column;align-items:center;gap:5px;text-align:center;text-decoration:none;}
.brand-kicker{font-family:var(--font-mono);font-size:11px;letter-spacing:.4em;text-indent:.4em;color:var(--cyan);}
.brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(30px,4.4vw,44px);line-height:1;
  letter-spacing:.1em;text-indent:.1em;color:var(--paper);
  transition:color .2s ease;
}
.brand-tagline{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.26em;color:var(--muted);}
.brand:hover .brand-name{color:#FFFFFF;}
.nav-bar{
  position:relative;z-index:45;
  background:var(--deck);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line);
}
.nav-bar-inner{position:relative;display:flex;align-items:center;justify-content:center;min-height:54px;}
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 13px;border:1px solid var(--line);
  background:rgba(6,24,38,.6);color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  cursor:pointer;border-radius:0;transition:border-color .2s,color .2s,background .2s;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(37,216,240,.1);}
.nav-toggle-bars{display:grid;gap:3px;width:16px;}
.nav-toggle-bars span{display:block;height:1px;background:currentColor;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(4px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-4px) rotate(-45deg);}
.primary-nav{display:flex;justify-content:center;}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center;gap:2px;list-style:none;margin:0;padding:0;}
.nav-item{list-style:none;}
.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:16px 15px;
  font-size:15px;letter-spacing:.04em;color:var(--paper-dim);
  border-bottom:2px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--paper);background:var(--cyan-soft);}
.nav-num{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:#4E6B7C;transition:color .2s ease;}
.nav-link:hover .nav-num{color:var(--cyan);}
.nav-link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan);background:rgba(37,216,240,.08);}
.nav-link[aria-current="page"] .nav-num{color:var(--cyan);}
.nav-status{
  position:absolute;right:var(--gutter);top:50%;transform:translateY(-50%);
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted);
  white-space:nowrap;
}
/* ---------- buttons / chips ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--cyan);border-radius:0;
  background:transparent;color:var(--cyan);
  font-family:var(--font-body);font-size:14px;font-weight:500;letter-spacing:.06em;
  text-decoration:none;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{background:var(--cyan-soft);color:#7BECF9;}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#0A1116;font-weight:700;}
.btn--primary:hover{background:#FF8F3D;border-color:#FF8F3D;color:#0A1116;}
.btn--ghost{border-color:var(--line);color:var(--paper);}
.btn--ghost:hover{border-color:var(--paper);background:rgba(232,239,244,.07);color:var(--paper);}
.btn--sm{padding:9px 14px;font-size:11.5px;letter-spacing:.1em;font-family:var(--font-mono);}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border:1px solid var(--line);
  background:rgba(11,36,52,.6);color:var(--paper-dim);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  transition:border-color .2s,color .2s,background .2s;
}
.chip:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(37,216,240,.08);}
.chip--accent{border-color:rgba(255,122,26,.5);color:var(--orange);}
.chip--accent:hover{border-color:var(--orange);color:var(--orange);background:rgba(255,122,26,.1);}
/* ---------- layout helpers ---------- */
.grid{display:grid;gap:var(--gap);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
/* ---------- breadcrumb ---------- */
.breadcrumb{padding:16px 0;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--muted);}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0;}
.breadcrumb li{display:flex;align-items:center;gap:6px;}
.breadcrumb li::after{content:"/";color:rgba(43,62,74,1);}
.breadcrumb li:last-child::after{content:none;}
.breadcrumb a{color:var(--paper-dim);}
.breadcrumb a:hover{color:var(--cyan);}
/* ---------- media ---------- */
.media-figure{margin:0;}
.media-frame{
  position:relative;overflow:hidden;
  background:var(--deck);
  border:1px solid var(--line);
  aspect-ratio:16/10;
}
.media-frame > img,.media-frame > svg,.media-frame > video{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(37,216,240,.06) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(37,216,240,.06) 1px,transparent 1px);
  background-size:32px 32px;
}
.media-frame::after{
  content:"";position:absolute;inset:8px;z-index:2;pointer-events:none;
  border:1px solid rgba(37,216,240,.16);
}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--tall{aspect-ratio:4/5;}
.media-caption{
  margin:10px 0 0;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.08em;color:var(--muted);
}
/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,#071B2A 0%,var(--ink) 100%);
  border-top:1px solid var(--line);
  color:var(--paper-dim);
}
.footer-inner{padding-top:clamp(36px,5vw,60px);padding-bottom:26px;}
.footer-top{
  display:grid;
  grid-template-columns:minmax(240px,1.6fr) repeat(2,minmax(120px,1fr)) minmax(200px,1.2fr);
  gap:clamp(24px,3vw,48px);
  padding-bottom:clamp(28px,3vw,40px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px;}
.brand--footer{align-items:flex-start;text-align:left;}
.brand--footer .brand-kicker{letter-spacing:.3em;text-indent:.3em;font-size:10.5px;}
.brand--footer .brand-name{font-size:26px;letter-spacing:.12em;text-indent:.12em;}
.footer-note{margin:0;font-size:13.5px;line-height:24px;color:var(--muted);max-width:42ch;}
.footer-status{display:inline-flex;align-items:center;gap:8px;margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--paper-dim);}
.footer-col{min-width:0;}
.footer-col-title{
  margin:0 0 14px;font-family:var(--font-mono);font-weight:500;
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:10px;font-size:14px;line-height:22px;}
.footer-links a{color:var(--paper-dim);border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.footer-links a:hover{color:var(--paper);border-bottom-color:var(--cyan);}
.footer-links li{color:var(--muted);}
.footer-mono{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--paper-dim);word-break:break-all;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-top:22px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted);
}
.footer-legal{margin:0;font-size:11.5px;color:var(--muted);}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:18px;list-style:none;margin:0;padding:0;}
.footer-legal-links a{color:var(--muted);}
.footer-legal-links a:hover{color:var(--cyan);}
.to-top{
  position:fixed;right:clamp(12px,2vw,24px);bottom:clamp(12px,2vw,24px);z-index:110;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border:1px solid var(--line);border-radius:0;
  background:rgba(11,36,52,.94);color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,border-color .2s,color .2s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{border-color:var(--cyan);color:var(--cyan);}
/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-status{display:none;}
}
@media (max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .grid--3{grid-template-columns:1fr;}
}
@media (max-width:960px){
  .masthead-inner{grid-template-columns:minmax(0,1fr);justify-items:center;gap:12px;}
  .masthead-aside{display:none;}
  .masthead-aside--end{display:none;}
  .nav-bar-inner{justify-content:center;position:static;min-height:52px;}
  .nav-toggle{display:inline-flex;position:absolute;top:50%;left:var(--gutter);transform:translateY(-50%);}
  .nav-status{display:inline-flex;top:50%;transform:translateY(-50%);right:var(--gutter);}
  .primary-nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;z-index:60;
    justify-content:flex-start;
    background:var(--deck);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 60px rgba(0,0,0,.55);
    max-height:min(72vh,480px);overflow-y:auto;
  }
  .primary-nav[data-open]{display:block;}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%;}
  .nav-link{
    width:100%;justify-content:flex-start;
    padding:14px var(--gutter);
    border-bottom:1px solid var(--line-soft);
    border-left:2px solid transparent;
    font-size:15px;
  }
  .nav-link[aria-current="page"]{border-bottom-color:var(--line-soft);border-left-color:var(--cyan);}
}
@media (max-width:620px){
  .strip-tag--mono{display:none;}
  .strip-inner{min-height:34px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .media-frame--wide{aspect-ratio:16/9;}
  .footer-note{font-size:13px;line-height:23px;}
}
@media (max-width:420px){
  .nav-status{display:none;}
  .nav-bar-inner{justify-content:flex-start;padding-left:calc(var(--gutter) + 92px);}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .dot{animation:none;}
  .to-top{transform:none;}
}