:root{
  --ink:#0B1B2B;
  --ink-2:#122A3F;
  --ink-3:#0E2334;
  --cyan:#00E5C3;
  --orange:#FF7A1A;
  --rock:#8FA3B0;
  --fog:#F2F6F8;
  --line:#1E3A50;
  --green:#3BE38B;
  --clay:#FFB27A;
  --mist:#7FF3E2;
  --font-display:"Arial Narrow","Roboto Condensed","Helvetica Neue",system-ui,"Noto Sans SC","PingFang SC",sans-serif;
  --font-body:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --w-max:1200px;
  --pad:24px;
  --cut:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 540px at 84% -12%,rgba(0,229,195,.10),transparent 62%),
    radial-gradient(760px 480px at 4% 6%,rgba(255,122,26,.07),transparent 60%),
    repeating-linear-gradient(90deg,rgba(30,58,80,.30) 0 1px,transparent 1px 96px);
  background-repeat:no-repeat,no-repeat,repeat;
  color:var(--fog);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  min-height:100vh;
}
img,svg,picture{max-width:100%}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-stretch:condensed;
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  margin:0 0 .5em;
  color:var(--fog);
}
h1{font-size:clamp(34px,5.6vw,72px)}
h2{font-size:clamp(24px,3.2vw,40px)}
h3{font-size:clamp(19px,2.1vw,28px)}
h4{font-size:clamp(16px,1.6vw,20px)}
p{margin:0 0 1.1em;max-width:68ch}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--mist)}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
::selection{background:rgba(0,229,195,.28);color:var(--fog)}
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:120;
  background:var(--cyan);color:var(--ink);
  font-weight:700;font-size:14px;padding:10px 18px;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px;color:var(--ink)}
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.eyebrow{
  display:inline-block;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);
  margin:0 0 14px;
}
.lede{font-size:19px;line-height:1.7;color:var(--rock);max-width:60ch}
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--pad)}
.section{padding-block:72px}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 24px;border-bottom:1px solid var(--line);
  padding-bottom:16px;margin-bottom:32px;
}
.section-head h2,.section-head h3{margin-bottom:0}
.split{display:grid;grid-template-columns:minmax(0,38fr) minmax(0,62fr);gap:32px}
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font-display);font-stretch:condensed;
  font-weight:800;font-size:15px;line-height:1;letter-spacing:.05em;
  padding:15px 24px;border:1px solid transparent;background:transparent;
  color:var(--fog);cursor:pointer;text-decoration:none;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--primary{background:var(--cyan);color:var(--ink)}
.btn--primary:hover{background:var(--mist);color:var(--ink)}
.btn--accent{background:var(--orange);color:#1B0C00}
.btn--accent:hover{background:var(--clay);color:#1B0C00}
.btn--ghost{border-color:var(--line);color:var(--fog)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--sm{padding:10px 16px;font-size:13px}
.btn:focus-visible{outline:2px solid var(--fog);outline-offset:2px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;
  padding:4px 9px;border:1px solid var(--line);color:var(--rock);white-space:nowrap;
}
.tag--cyan{color:var(--mist);border-color:rgba(0,229,195,.40);background:rgba(0,229,195,.08)}
.tag--orange{color:var(--clay);border-color:rgba(255,122,26,.40);background:rgba(255,122,26,.08)}
.tag--green{color:var(--green);border-color:rgba(59,227,139,.40);background:rgba(59,227,139,.08)}
.panel{background:var(--ink-2);border:1px solid var(--line);padding:24px}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
  transition:border-color .18s var(--ease);
}
.panel--cut:hover{border-color:rgba(0,229,195,.45)}
.panel-head{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:12px;margin-bottom:16px;
}
.panel-head h3,.panel-head h4{margin:0}
.panel-body p:last-child{margin-bottom:0}
.node-line{
  position:relative;height:1px;margin:0;
  background:linear-gradient(90deg,var(--line),rgba(0,229,195,.65));
}
.node-line::after{
  content:"";position:absolute;right:0;top:-2.5px;
  width:6px;height:6px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.divider{height:1px;background:var(--line);border:0;margin:0}
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:var(--media-ratio,16/9);
  background:linear-gradient(158deg,var(--ink-2),var(--ink-3));
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
}
.media-frame > img,.media-frame > picture,.media-frame > svg{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media-frame::before{
  content:"";position:absolute;top:10px;right:10px;z-index:2;
  width:8px;height:8px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px var(--cyan);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 100% at 100% 0,rgba(0,229,195,.16),transparent 55%);
}
.media-frame--wide{--media-ratio:21/9}
.media-frame--tall{--media-ratio:4/5}
.media-frame--square{--media-ratio:1/1}
.media-placeholder{
  position:absolute;inset:0;z-index:1;
  display:grid;place-content:center;gap:8px;text-align:center;
  padding:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:rgba(143,163,176,.85);
  background-image:
    linear-gradient(to right,rgba(30,58,80,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(30,58,80,.55) 1px,transparent 1px);
  background-size:48px 48px;
}
.media-caption{
  margin-top:8px;font-family:var(--font-mono);
  font-size:12px;letter-spacing:.04em;color:var(--rock);
}
.breadcrumb{
  background:rgba(18,42,63,.55);
  border-bottom:1px solid var(--line);
}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  list-style:none;margin:0;padding:11px 0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--rock);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:10px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--line)}
.breadcrumb-item a{color:var(--rock)}
.breadcrumb-item a:hover{color:var(--cyan)}
.breadcrumb-item [aria-current="page"]{color:var(--fog)}
.crumb-index{
  font-family:var(--font-mono);font-size:10px;
  color:rgba(143,163,176,.62);letter-spacing:.06em;
}
.tabs{display:block}
.tab-list{
  display:flex;gap:2px;overflow-x:auto;
  border-bottom:1px solid var(--line);
  -webkit-overflow-scrolling:touch;
}
.tab{
  position:relative;flex:none;
  appearance:none;border:0;background:transparent;
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  letter-spacing:.06em;color:var(--rock);
  padding:12px 16px;cursor:pointer;white-space:nowrap;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.tab:hover{color:var(--fog)}
.tab[aria-selected="true"]{color:var(--fog);background:rgba(0,229,195,.10)}
.tab[aria-selected="true"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(0,229,195,.6);
}
.tab-panel{padding-top:22px}
.tab-panel[hidden]{display:none}
.tab-panel:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
.has-js [data-reveal]{
  opacity:0;transform:translateY(8px);
  transition:opacity .45s var(--ease),transform .45s var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}
/* ---------- 头部 ---------- */
.site-header{
  --hh:64px;
  position:sticky;top:0;z-index:60;
  background:rgba(11,27,43,.94);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header.is-stuck{
  --hh:56px;
  background:rgba(9,22,35,.82);
  -webkit-backdrop-filter:blur(12px) saturate(1.25);
  backdrop-filter:blur(12px) saturate(1.25);
}
.progress-track{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:transparent;pointer-events:none;overflow:hidden;
}
.progress-bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}
.header-shell{
  width:100%;max-width:var(--w-max);margin-inline:auto;
  padding-inline:var(--pad);
  min-height:var(--hh);
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;
  transition:min-height .22s var(--ease);
}
.brand-lockup{
  display:inline-flex;align-items:center;gap:11px;
  color:var(--fog);text-decoration:none;flex:none;
}
.brand-lockup:hover{color:var(--fog)}
.brand-mark{
  position:relative;width:28px;height:28px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(150deg,var(--cyan),rgba(0,229,195,.18));
  clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);
}
.brand-node{
  width:7px;height:7px;background:var(--ink);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-abbr{
  font-family:var(--font-mono);font-size:15px;font-weight:700;
  letter-spacing:.10em;color:var(--fog);
}
.brand-dot{color:var(--orange);margin-inline:1px}
.brand-sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--rock);margin-top:3px;
}
.nav-toggle{
  display:none;align-items:center;gap:10px;
  background:transparent;border:1px solid var(--line);
  color:var(--fog);cursor:pointer;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  padding:9px 13px;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bars span{
  display:block;height:1px;background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(2.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-2.5px) rotate(-45deg)}
.nav-rail{
  display:flex;align-items:center;gap:24px;margin-left:auto;
}
.nav-list{
  display:flex;align-items:center;gap:20px;
  list-style:none;margin:0;padding:0;
}
.nav-item{position:relative}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:6px 1px 9px;color:var(--rock);
  font-size:14px;font-weight:500;white-space:nowrap;
  text-decoration:none;
  transition:color .18s var(--ease);
}
.nav-link:hover{color:var(--fog)}
.nav-index{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;
  color:rgba(143,163,176,.55);
  transition:color .18s var(--ease);
}
.nav-link:hover .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]{color:var(--fog);font-weight:700}
.nav-link[aria-current="page"] .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(0,229,195,.7);
}
.utility-link{
  display:inline-flex;align-items:center;gap:8px;
  flex:none;padding:9px 13px;
  font-size:13px;font-weight:600;color:var(--cyan);
  border:1px solid rgba(0,229,195,.35);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.utility-link:hover{background:var(--cyan);color:var(--ink);border-color:var(--cyan)}
.utility-dot{
  width:6px;height:6px;border-radius:50%;flex:none;
  background:var(--cyan);box-shadow:0 0 8px var(--cyan);
}
.utility-link:hover .utility-dot{background:var(--ink);box-shadow:none}
/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:96px;
  background:#081420;
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--orange),transparent);
  opacity:.65;
}
.footer-shell{
  width:100%;max-width:var(--w-max);margin-inline:auto;
  padding:56px var(--pad) 28px;
}
.footer-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 32px;
  padding-bottom:24px;border-bottom:1px solid var(--line);
}
.footer-brand{max-width:46ch}
.footer-lockup{
  margin:0;
  font-family:var(--font-display);font-stretch:condensed;
  font-weight:800;font-size:22px;letter-spacing:-.01em;color:var(--fog);
}
.footer-note{
  margin:8px 0 0;font-size:13px;line-height:1.7;color:var(--rock);max-width:44ch;
}
.footer-note--sub{
  margin-top:14px;font-size:12px;line-height:1.7;color:rgba(143,163,176,.8);max-width:40ch;
}
.footer-status{
  display:inline-flex;align-items:center;gap:8px;margin:0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.10em;
  text-transform:uppercase;color:var(--green);
}
.status-dot{
  width:7px;height:7px;border-radius:50%;flex:none;
  background:var(--green);box-shadow:0 0 10px rgba(59,227,139,.85);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr 1.2fr;
  gap:40px 32px;
  padding-block:36px;
}
.footer-col{min-width:0}
.footer-title{
  margin:0 0 16px;
  font-family:var(--font-mono);font-size:11px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);line-height:1.4;
}
.footer-route-list{list-style:none;margin:0;padding:0}
.footer-route-item + .footer-route-item{border-top:1px solid rgba(30,58,80,.65)}
.footer-route-link{
  display:flex;align-items:center;gap:10px;
  padding:11px 0;color:var(--fog);font-size:15px;font-weight:600;
  transition:color .18s var(--ease);
}
.footer-route-link:hover{color:var(--cyan)}
.route-index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:rgba(143,163,176,.6);min-width:20px;
}
.route-name{flex:1 1 auto}
.route-arrow{
  color:var(--cyan);font-family:var(--font-mono);
  transition:transform .18s var(--ease);
}
.footer-route-link:hover .route-arrow{transform:translateX(3px)}
.footer-link-list{
  list-style:none;margin:0;padding:0;
  display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;
}
.footer-link{
  display:inline-block;padding:3px 0;
  font-size:14px;color:var(--rock);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:var(--cyan);border-color:rgba(0,229,195,.5)}
.contact-list{margin:0;display:grid;gap:10px}
.contact-row{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:12px;align-items:baseline;
}
.contact-label{
  margin:0;font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--rock);white-space:nowrap;
}
.contact-value{
  margin:0;font-size:14px;line-height:1.65;color:var(--fog);
  overflow-wrap:anywhere;
}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  border-top:1px solid var(--line);padding-top:20px;
}
.legal-line{
  margin:0;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.04em;color:rgba(143,163,176,.78);line-height:1.7;
}
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:70;
  width:44px;height:44px;display:grid;place-items:center;
  background:var(--ink-2);border:1px solid var(--line);
  color:var(--cyan);font-size:16px;line-height:1;cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan);color:var(--mist)}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .split{grid-template-columns:1fr;gap:24px}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .footer-col:last-child{grid-column:1 / -1}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .nav-rail{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;
    background:rgba(18,42,63,.98);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    padding:8px var(--pad) 22px;
    max-height:calc(100vh - var(--hh));
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-8px);
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
  }
  .nav-rail[data-open="true"]{
    opacity:1;visibility:visible;pointer-events:auto;transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(30,58,80,.8)}
  .nav-link{
    display:flex;align-items:center;padding:15px 0;
    font-size:16px;color:var(--fog);
  }
  .nav-link[aria-current="page"]::after{
    left:0;right:auto;bottom:-1px;width:32px;height:2px;
  }
  .nav-index{min-width:24px;font-size:11px}
  .utility-link{margin-top:18px;justify-content:center;padding:12px 16px;font-size:14px}
}
@media (max-width:768px){
  :root{--pad:16px;--cut:12px}
  body{font-size:15px;line-height:1.7}
  .section{padding-block:48px}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-block:28px}
  .footer-col:last-child{grid-column:auto}
  .footer-shell{padding-top:40px}
  .footer-link-list{grid-template-columns:1fr 1fr}
  .site-footer{margin-top:64px}
  .media-frame--wide{--media-ratio:16/9}
  .to-top{right:14px;bottom:14px;width:40px;height:40px}
  .lede{font-size:17px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;transition:none}
  .nav-rail{transition:none}
}