:root{
  --ink-900:#071426;
  --ink-800:#0B1F3A;
  --ink-700:#17395C;
  --line:rgba(23,57,92,.85);
  --cyan:#5FF5E3;
  --orange:#FF7A2F;
  --paper:#F2F6F8;
  --mist:#A9B8C6;
  --amber:#FFC857;
  --green:#2EC4A6;
  --coral:#FF5A5A;
  --maxw:1440px;
  --gutter:clamp(20px,5vw,56px);
  --radius-lg:26px;
  --radius-md:16px;
  --radius-sm:10px;
  --font-head:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Roboto Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:200ms;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body[data-nav-open="true"]{overflow:hidden}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
img{max-width:100%;height:auto}
a{color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}
.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  padding:10px 18px;
  border-radius:999px;
  background:var(--cyan);
  color:var(--ink-900);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  text-decoration:none;
  transform:translateY(-160%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0)}
#main-content{scroll-margin-top:clamp(96px,14vw,136px)}
.page-main{
  display:block;
  padding-block:clamp(28px,4vw,52px) clamp(52px,7vw,96px);
}
/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(7,20,38,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:background var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header--scrolled{
  background:rgba(7,20,38,.99);
  box-shadow:0 22px 46px -32px rgba(0,0,0,.95);
}
.header-top{border-bottom:1px solid rgba(23,57,92,.55)}
.header-top__inner{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:clamp(14px,2.6vw,36px);
  min-height:60px;
  padding-block:8px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  color:var(--paper);
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:32px;height:32px;
  border-radius:11px;
  background:linear-gradient(150deg,var(--orange),#ffab74);
  box-shadow:inset 0 0 0 1px rgba(7,20,38,.28);
}
.brand__mark::before,
.brand__mark::after{
  content:"";
  position:absolute;
  left:7px;right:7px;
  height:2px;
  border-radius:2px;
  background:var(--ink-900);
}
.brand__mark::before{top:12px;transform:rotate(-16deg)}
.brand__mark::after{bottom:12px;transform:rotate(-16deg);opacity:.5}
.brand__text{display:block;line-height:1.1}
.brand__name{
  display:block;
  font-family:var(--font-head);
  font-size:17px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--paper);
}
.brand__sub{
  display:block;
  margin-top:4px;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.3em;
  color:var(--mist);
}
.brand--footer .brand__name{font-size:19px}
.header-tagline{
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--mist);
}
.header-meta{
  margin-inline-start:auto;
  display:flex;
  align-items:center;
  gap:14px;
  font-size:12px;
  letter-spacing:.07em;
  color:var(--mist);
}
.header-meta__dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(46,196,166,.16);
  flex:0 0 auto;
}
.header-meta__item{white-space:nowrap}
.header-search{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:34px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid rgba(169,184,198,.32);
  color:var(--paper);
  font-size:12px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.header-search:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(95,245,227,.08);
}
.icon-search{
  position:relative;
  display:inline-block;
  flex:0 0 auto;
  width:12px;height:12px;
  border:2px solid currentColor;
  border-radius:50%;
}
.icon-search::after{
  content:"";
  position:absolute;
  right:-4px;bottom:-4px;
  width:2px;height:6px;
  border-radius:2px;
  background:currentColor;
  transform:rotate(45deg);
}
.header-nav__inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  min-height:64px;
}
.primary-nav{flex:1 1 auto;min-width:0}
.primary-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
}
.primary-nav__item{display:block}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:7px;
  min-height:44px;
  padding:0 13px;
  border-radius:10px;
  color:var(--mist);
  font-size:13.5px;
  letter-spacing:.09em;
  text-decoration:none;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link__arrow{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--ink-700);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(23,57,92,.62)}
.nav-link:hover .nav-link__arrow{color:var(--orange);transform:translate(2px,-2px)}
.nav-link[aria-current="page"]{
  color:var(--ink-900);
  background:var(--cyan);
  font-weight:600;
}
.nav-link[aria-current="page"] .nav-link__arrow{color:var(--ink-900);opacity:.55}
.nav-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  margin-inline-start:auto;
  min-height:44px;
  padding:0 22px;
  border-radius:999px;
  background:var(--orange);
  color:var(--ink-900);
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-decoration:none;
  white-space:nowrap;
  transition:background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-cta:hover{background:#ff9257;transform:translateY(-2px)}
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  min-height:44px;
  padding:0 15px;
  border-radius:999px;
  border:1px solid rgba(169,184,198,.32);
  background:transparent;
  color:var(--paper);
  font-size:13px;
  letter-spacing:.1em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle__bars{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:currentColor;
  position:relative;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-veil{display:none}
/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding-top:clamp(46px,7vw,86px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .85fr .95fr 1.15fr;
  gap:clamp(26px,4vw,52px);
  padding-bottom:clamp(34px,5vw,62px);
}
.footer-brand__note{
  margin-top:18px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.8;
  color:var(--mist);
}
.footer-icp{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
  opacity:.8;
}
.footer-col__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-list{display:grid;gap:11px}
.footer-list__item{display:block}
.footer-link{
  display:inline-block;
  font-size:14.5px;
  letter-spacing:.04em;
  color:#cfdae3;
  text-decoration:none;
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact__list{display:grid;gap:14px}
.footer-contact__item{display:grid;gap:3px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--mist);
}
.footer-contact__value{
  font-size:14.5px;
  line-height:1.65;
  color:var(--paper);
  overflow-wrap:anywhere;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  padding-block:22px;
  border-top:1px solid rgba(23,57,92,.8);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-base__copy{font-family:var(--font-mono)}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:20px;
}
.footer-legal a{
  color:var(--mist);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-legal a:hover{color:var(--cyan)}
/* ---------- shared typography ---------- */
.display{
  font-family:var(--font-head);
  font-weight:300;
  font-size:clamp(46px,7.6vw,104px);
  line-height:.98;
  letter-spacing:.02em;
  font-stretch:condensed;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--mist);
}
.section-num{
  font-family:var(--font-mono);
  font-size:clamp(42px,8vw,92px);
  line-height:1;
  letter-spacing:.02em;
  color:rgba(23,57,92,.95);
  -webkit-text-stroke:1px rgba(95,245,227,.4);
}
.lede{
  max-width:44ch;
  font-size:clamp(16.5px,1.5vw,19.5px);
  line-height:1.8;
  color:#cbd8e2;
}
.prose{max-width:680px}
.prose p{margin-bottom:1.1em}
.prose p:last-child{margin-bottom:0}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(95,245,227,.4)}
.prose a:hover{border-bottom-color:var(--cyan)}
.mono{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
/* ---------- buttons & pills ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--orange);color:var(--ink-900)}
.btn--primary:hover{background:#ff9257;transform:translateY(-2px)}
.btn--cyan{background:var(--cyan);color:var(--ink-900)}
.btn--cyan:hover{background:#87f8ea;transform:translateY(-2px)}
.btn--ghost{border-color:rgba(169,184,198,.42);color:var(--paper);background:transparent}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 13px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  line-height:1.7;
}
.pill--cyan{background:rgba(95,245,227,.14);border-color:rgba(95,245,227,.36);color:var(--cyan)}
.pill--orange{background:var(--orange);color:var(--ink-900);font-weight:700}
.pill--amber{background:rgba(255,200,87,.15);border-color:rgba(255,200,87,.4);color:var(--amber)}
.pill--muted{background:rgba(169,184,198,.12);border-color:rgba(169,184,198,.28);color:var(--mist)}
/* ---------- sections, bento, cards ---------- */
.section{padding-block:clamp(52px,8vw,112px)}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:14px 30px;
  margin-bottom:clamp(26px,4vw,46px);
}
.section__title{
  font-family:var(--font-head);
  font-weight:400;
  font-size:clamp(27px,4vw,46px);
  line-height:1.14;
  letter-spacing:.02em;
}
.bento{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:clamp(14px,1.6vw,22px);
}
.card{
  position:relative;
  overflow:hidden;
  grid-column:span 12;
  padding:clamp(20px,2.4vw,32px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:var(--ink-800);
  color:var(--paper);
}
.card--focus{
  background:linear-gradient(152deg,var(--ink-800) 0%,#102c4c 62%,#12385c 100%);
  border-color:rgba(95,245,227,.26);
}
.card--focus::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(95,245,227,.055) 0 1px,transparent 1px 8px);
}
.card__label{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--mist);
}
.card__title{
  margin-bottom:10px;
  font-family:var(--font-head);
  font-weight:400;
  font-size:clamp(20px,2.2vw,28px);
  line-height:1.22;
  letter-spacing:.02em;
}
.card__text{
  font-size:15.5px;
  line-height:1.8;
  color:#c3d1dc;
}
/* ---------- media frame ---------- */
.media-frame{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  display:block;
  width:100%;
  aspect-ratio:4/3;
  border-radius:var(--radius-md);
  background:linear-gradient(158deg,var(--ink-700) 0%,var(--ink-800) 46%,var(--ink-900) 100%);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(108deg,rgba(255,255,255,.045) 0 1px,transparent 1px 7px),
    linear-gradient(128deg,rgba(255,122,47,.16),transparent 58%);
  mix-blend-mode:screen;
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.06) brightness(.95);
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;
  left:14px;bottom:14px;
  z-index:2;
  padding:5px 11px;
  border-radius:999px;
  background:rgba(7,20,38,.74);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--paper);
}
/* ---------- breadcrumb ---------- */
.breadcrumb{
  margin-bottom:clamp(18px,3vw,28px);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:9px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--ink-700)}
.breadcrumb a{color:var(--mist);text-decoration:none;transition:color var(--dur) var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--paper)}
/* ---------- reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-visible{opacity:1;transform:none}
/* ---------- responsive ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .header-tagline{display:none}
  .header-top__inner{min-height:54px}
  .header-nav__inner{min-height:58px}
  .primary-nav{
    position:fixed;
    inset-inline:0;
    bottom:0;
    z-index:120;
    max-height:82vh;
    overflow-y:auto;
    padding:22px var(--gutter) 30px;
    border-top:1px solid var(--ink-700);
    border-radius:26px 26px 0 0;
    background:var(--ink-800);
    box-shadow:0 -30px 60px -30px rgba(0,0,0,.9);
    transform:translateY(104%);
    visibility:hidden;
    transition:transform 340ms var(--ease),visibility 340ms var(--ease);
  }
  .primary-nav[data-open]{
    transform:translateY(0);
    visibility:visible;
  }
  .primary-nav__list{flex-direction:column;gap:0}
  .nav-link{
    width:100%;
    justify-content:space-between;
    min-height:54px;
    padding:0 4px;
    border-radius:0;
    border-bottom:1px solid rgba(23,57,92,.55);
    font-size:16px;
    letter-spacing:.06em;
  }
  .nav-link:hover{background:transparent;color:var(--cyan)}
  .nav-link__arrow{color:var(--cyan)}
  .nav-link[aria-current="page"]{
    background:transparent;
    color:var(--cyan);
    padding-inline:4px;
  }
  .nav-link[aria-current="page"] .nav-link__arrow{color:var(--cyan);opacity:1}
  .nav-veil{
    display:block;
    position:fixed;
    inset:0;
    z-index:110;
    background:rgba(3,9,18,.66);
    -webkit-backdrop-filter:blur(2px);
    backdrop-filter:blur(2px);
  }
}
@media (max-width:720px){
  body{font-size:16px}
  .header-meta__item{display:none}
  .header-meta{gap:10px}
  .header-search{padding:0 12px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-brand{grid-column:auto}
  .footer-base{flex-direction:column;align-items:flex-start}
  .btn{width:100%}
  .btn--ghost{width:auto}
}
@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;transform:none;transition:none}
}