*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}

:root{
  --abyss:#04121F;
  --abyss-700:#0A2233;
  --deep:#0E3A5C;
  --cyan:#22E3D2;
  --coral:#FF6B4A;
  --purple:#8B5CF6;
  --seafoam:#7FE7C4;
  --amber:#FFC24B;
  --sand:#E8F1F5;
  --mist:#9FB4C4;
  --line:rgba(159,180,196,.2);
  --line-strong:rgba(34,227,210,.4);
  --font-cn:"Source Han Sans SC","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Archivo Narrow","Barlow Condensed","Oswald","Arial Narrow","Helvetica Neue",var(--font-cn);
  --shell:1280px;
  --gutter:clamp(18px,4vw,56px);
  --header-h:92px;
  --header-h-compact:64px;
  --r-panel:26px 8px 26px 8px;
  --r-soft:14px 4px 14px 4px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap-grid:clamp(16px,2.2vw,28px);
}

body{
  min-height:100vh;
  color:var(--sand);
  background-color:var(--abyss);
  background-image:
    radial-gradient(1000px 620px at 84% -10%,rgba(139,92,246,.18),transparent 62%),
    radial-gradient(920px 540px at 6% 2%,rgba(34,227,210,.13),transparent 60%),
    radial-gradient(760px 720px at 50% 118%,rgba(255,107,74,.10),transparent 66%);
  font-family:var(--font-cn);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{font-weight:800;line-height:1.14;letter-spacing:-.01em;color:var(--sand)}
h2{font-size:clamp(26px,3.2vw,40px)}
h3{font-size:clamp(19px,2vw,24px)}
p{line-height:1.78}
strong{color:var(--cyan);font-weight:700}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(34,227,210,.32);color:#fff}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}
.hairline{height:1px;border:0;margin:0;background:var(--line)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap-grid)}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.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-12{grid-column:span 12}

.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-num);font-size:11.5px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.eyebrow::before{content:"";display:block;width:22px;height:1px;background:currentColor}
.index-num{font-family:var(--font-num);font-size:13px;letter-spacing:.16em;color:var(--cyan)}
.display-title{font-size:clamp(32px,4.6vw,56px);font-weight:800;line-height:1.08;letter-spacing:-.015em;color:var(--sand)}
.section-head{display:grid;gap:14px;max-width:72ch;margin-bottom:clamp(22px,3vw,38px)}

.prose{max-width:68ch;color:var(--sand);font-size:clamp(16px,1.05vw,17px);line-height:1.8}
.prose p+p{margin-top:1.05em}
.prose h2,.prose h3{margin-top:1.6em;margin-bottom:.6em}
.prose ul,.prose ol{display:grid;gap:8px;margin-top:1em;padding-left:0}
.prose li{position:relative;padding-left:20px;color:var(--mist)}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--cyan)}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:1px solid transparent;border-radius:999px;font-size:14px;font-weight:600;letter-spacing:.03em;white-space:nowrap;transition:transform .18s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.btn--sm{padding:9px 17px;font-size:13px}
.btn--coral{background:var(--coral);color:#1A0703;box-shadow:0 10px 24px -14px rgba(255,107,74,.95)}
.btn--coral:hover,.btn--coral:focus-visible{background:#FF8266;transform:translateY(-2px)}
.btn--solid{background:var(--cyan);color:#04121F;box-shadow:0 10px 24px -14px rgba(34,227,210,.9)}
.btn--solid:hover,.btn--solid:focus-visible{background:#5CF0E2;transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-strong);color:var(--cyan);background:rgba(34,227,210,.07)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:rgba(34,227,210,.16);border-color:var(--cyan);transform:translateY(-2px)}
.btn--block{width:100%}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border:1px solid currentColor;border-radius:999px;font-family:var(--font-num);font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);background:rgba(34,227,210,.08)}
.tag--coral{color:var(--coral);background:rgba(255,107,74,.1)}
.tag--purple{color:var(--purple);background:rgba(139,92,246,.13)}
.tag--seafoam{color:var(--seafoam);background:rgba(127,231,196,.1)}
.tag--amber{color:var(--amber);background:rgba(255,194,75,.12)}

.chip{display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border:1px solid var(--line);border-radius:999px;color:var(--mist);font-size:13.5px;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
.chip:hover{color:var(--sand);border-color:var(--line-strong)}
.chip[aria-pressed="true"]{color:var(--abyss);background:var(--cyan);border-color:var(--cyan);font-weight:600}

.card{position:relative;display:flex;flex-direction:column;gap:12px;padding:clamp(18px,2.2vw,26px);background:var(--abyss-700);border:1px solid var(--line);border-radius:var(--r-panel);transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 24px 44px -30px rgba(0,0,0,.95)}

.panel{position:relative;padding:clamp(20px,2.6vw,32px);background:linear-gradient(155deg,rgba(14,58,92,.42),rgba(10,34,51,.88));border:1px solid var(--line);border-radius:var(--r-panel)}

.fold{border:1px solid var(--line);border-radius:var(--r-panel);background:rgba(10,34,51,.62);overflow:hidden}
.fold+.fold{margin-top:12px}
.fold__summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;font-weight:600;color:var(--sand);cursor:pointer;list-style:none;transition:background-color .2s var(--ease)}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary:hover{background:rgba(34,227,210,.07)}
.fold__summary::after{content:"+";font-family:var(--font-num);font-size:18px;line-height:1;color:var(--cyan);transition:transform .22s var(--ease)}
.fold[open] .fold__summary::after{transform:rotate(45deg)}
.fold__body{padding:0 20px 18px;color:var(--mist);font-size:15px;line-height:1.75}

.rail{display:flex;gap:clamp(14px,2vw,22px);overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:12px;scrollbar-width:thin;scrollbar-color:var(--deep) transparent}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:var(--deep);border-radius:99px}
.rail__item{flex:0 0 clamp(240px,32vw,340px);scroll-snap-align:start}

.media{position:relative;overflow:hidden;isolation:isolate;border-radius:var(--r-panel);border:1px solid var(--line);background:linear-gradient(150deg,var(--deep),var(--abyss-700) 65%,var(--abyss));background-image:linear-gradient(150deg,var(--deep),var(--abyss-700) 65%,var(--abyss)),linear-gradient(90deg,rgba(34,227,210,.14) 1px,transparent 1px),linear-gradient(0deg,rgba(34,227,210,.14) 1px,transparent 1px);background-size:auto,44px 44px,44px 44px}
.media::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(180deg,rgba(4,18,31,0) 42%,rgba(4,18,31,.78))}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--21x9{aspect-ratio:21/9}
.media--1x1{aspect-ratio:1/1}
.media__img{width:100%;height:100%;object-fit:cover}
.media__caption{position:absolute;left:16px;right:16px;bottom:14px;z-index:2;font-family:var(--font-num);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--seafoam)}

.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-num);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--mist)}
.breadcrumbs__link{color:var(--mist);transition:color .18s var(--ease)}
.breadcrumbs__link:hover{color:var(--cyan)}
.breadcrumbs__sep{color:var(--deep)}
.breadcrumbs [aria-current="page"]{color:var(--sand)}

.skip-link{position:absolute;left:var(--gutter);top:-120px;z-index:120;padding:12px 22px;background:var(--cyan);color:#04121F;font-weight:700;font-size:14px;border-radius:0 0 14px 4px;transition:top .2s var(--ease)}
.skip-link:focus{top:0}

.site-header{position:sticky;top:0;z-index:80;background:linear-gradient(180deg,rgba(4,18,31,.94),rgba(4,18,31,.42) 72%,rgba(4,18,31,0));border-bottom:1px solid transparent;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:background-color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease)}
.site-header[data-scrolled]{background:rgba(10,34,51,.97);border-bottom-color:var(--line);box-shadow:0 16px 34px -24px rgba(0,0,0,.95)}

.header-grid{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter);min-height:var(--header-h);display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:clamp(12px,2vw,32px);transition:min-height .25s var(--ease)}
.site-header[data-scrolled] .header-grid{min-height:var(--header-h-compact)}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand__mark{flex:0 0 auto;width:40px;height:40px;display:grid;place-items:center;font-family:var(--font-num);font-size:15px;font-weight:700;letter-spacing:.04em;color:var(--cyan);background:rgba(34,227,210,.08);border:1px solid var(--line-strong);border-radius:12px 3px 12px 3px;box-shadow:inset 0 0 18px rgba(34,227,210,.18);transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.brand:hover .brand__mark{transform:rotate(-5deg);border-color:var(--cyan)}
.brand__text{display:flex;flex-direction:column;min-width:0;line-height:1.15}
.brand__name{font-size:16px;font-weight:800;letter-spacing:.02em;color:var(--sand);white-space:nowrap}
.brand__tag{font-family:var(--font-num);font-size:10px;font-weight:600;letter-spacing:.22em;color:var(--mist);white-space:nowrap}

.primary-nav{justify-self:center}
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px)}
.primary-nav__item{display:block}
.nav-link{position:relative;display:inline-block;padding:9px 2px;font-size:14.5px;font-weight:500;color:var(--mist);transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:3px;height:2px;background:var(--cyan);transform:scaleX(0);transform-origin:left center;transition:transform .18s var(--ease)}
.nav-link:hover,.nav-link:focus-visible{color:var(--sand)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:linear-gradient(90deg,var(--cyan),var(--purple))}

.header-actions{display:flex;align-items:center;gap:10px;justify-self:end}
.index-toggle{display:inline-flex;align-items:center;gap:8px;padding:9px 15px;border:1px solid var(--line);border-radius:999px;font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.16em;color:var(--mist);transition:color .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease)}
.index-toggle::before{content:"";display:block;width:6px;height:6px;border-radius:50%;background:var(--seafoam);box-shadow:0 0 10px var(--seafoam)}
.index-toggle:hover{color:var(--sand);border-color:var(--line-strong);background:rgba(34,227,210,.08)}
.index-toggle[aria-expanded="true"]{color:#04121F;background:var(--cyan);border-color:var(--cyan)}
.index-toggle[aria-expanded="true"]::before{background:#04121F;box-shadow:none}

.nav-toggle{display:none;position:relative;width:44px;height:44px;border:1px solid var(--line);border-radius:12px 4px 12px 4px;transition:border-color .18s var(--ease),background-color .18s var(--ease)}
.nav-toggle:hover{border-color:var(--line-strong);background:rgba(34,227,210,.08)}
.nav-toggle__bars{position:absolute;left:50%;top:50%;width:18px;height:2px;background:var(--sand);transform:translate(-50%,-50%);transition:background-color .18s var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--sand);transition:transform .22s var(--ease),top .22s var(--ease),background-color .18s var(--ease)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg);background:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg);background:var(--cyan)}

.site-index{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:min(940px,calc(100% - (var(--gutter) * 2)));z-index:90;padding:22px clamp(18px,3vw,30px) 26px;background:linear-gradient(160deg,rgba(10,34,51,.99),rgba(4,18,31,.99));border:1px solid var(--line-strong);border-radius:var(--r-panel);box-shadow:0 34px 66px -34px rgba(0,0,0,.98)}
.site-index__head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--line)}
.site-index__label{font-family:var(--font-num);font-size:11.5px;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan)}
.site-index__hint{font-size:12.5px;color:var(--mist)}
.site-index__list{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:6px}
.site-index__link{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid transparent;border-radius:var(--r-soft);transition:background-color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease)}
.site-index__link:hover,.site-index__link:focus-visible{background:rgba(34,227,210,.1);border-color:var(--line-strong);transform:translateX(3px)}
.site-index__num{font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--cyan)}
.site-index__text{font-size:14px;color:var(--sand)}

.scroll-meter{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(159,180,196,.14)}
.scroll-meter__fill{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--cyan),var(--purple) 58%,var(--coral));transition:width .1s linear}

.site-footer{position:relative;margin-top:clamp(56px,9vw,120px);background:linear-gradient(180deg,rgba(4,18,31,.35),var(--abyss-700) 42%);border-top:1px solid var(--line);color:var(--mist);overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.75;background-image:linear-gradient(90deg,rgba(159,180,196,.09) 1px,transparent 1px),linear-gradient(0deg,rgba(159,180,196,.06) 1px,transparent 1px);background-size:calc(100% / 12) 100%,100% 64px;-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 82%);mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 82%)}
.footer-grid{position:relative;width:100%;max-width:var(--shell);margin-inline:auto;padding:clamp(38px,5vw,66px) var(--gutter) clamp(28px,4vw,46px);display:grid;grid-template-columns:1.5fr 1fr 1fr 1.35fr;gap:clamp(24px,3vw,44px)}
.footer-col{min-width:0}
.footer-col--brand{display:grid;gap:14px;align-content:start}
.footer-brand__name{font-size:20px;font-weight:800;color:var(--sand);letter-spacing:.01em}
.footer-brand__line{font-size:14px;line-height:1.72;color:var(--mist);max-width:32ch}
.footer-mail{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px}
.footer-mail__label{font-family:var(--font-num);font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--deep);color:var(--cyan)}
.footer-mail__value{color:var(--sand);word-break:break-all}
.copy-btn{padding:4px 10px;border:1px solid var(--line);border-radius:999px;font-family:var(--font-num);font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--mist);transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease)}
.copy-btn:hover{color:var(--cyan);border-color:var(--line-strong);background:rgba(34,227,210,.08)}
.copy-btn[data-copied="true"]{color:var(--seafoam);border-color:var(--seafoam);background:rgba(127,231,196,.12)}
.copy-btn[data-copied="false"]{color:var(--amber);border-color:var(--amber);background:rgba(255,194,75,.12)}
.footer-label{display:flex;align-items:center;gap:8px;margin-bottom:14px;font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--sand)}
.footer-label::after{content:"";flex:1;height:1px;background:var(--line)}
.footer-label__num{font-family:var(--font-num);font-size:11px;letter-spacing:.16em;color:var(--cyan)}
.footer-list{display:grid;gap:2px}
.footer-link{display:inline-block;padding:6px 0;font-size:14.5px;color:var(--sand);opacity:.88;background-image:linear-gradient(var(--cyan),var(--cyan));background-repeat:no-repeat;background-position:0 100%;background-size:0 1px;transition:background-size .18s var(--ease),color .18s var(--ease),opacity .18s var(--ease)}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan);opacity:1;background-size:100% 1px}
.footer-list--meta{gap:10px}
.footer-meta{display:grid;grid-template-columns:44px 1fr;gap:8px;font-size:13.5px;line-height:1.6}
.footer-meta__key{font-family:var(--font-num);font-size:11px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--deep);color:var(--mist);padding-top:3px}
.footer-meta__val{color:var(--sand)}
.footer-base{position:relative;width:100%;max-width:var(--shell);margin-inline:auto;padding:16px var(--gutter) 20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 20px}
.footer-copy{margin:0;font-family:var(--font-num);font-size:12px;letter-spacing:.14em;color:var(--mist)}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.footer-legal__link{font-family:var(--font-num);font-size:12px;letter-spacing:.12em;color:var(--mist);transition:color .18s var(--ease)}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--cyan)}

@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-col--brand{grid-column:1 / -1}
}
@media (max-width:1024px){
  :root{--header-h:76px}
  .header-grid{grid-template-columns:auto 1fr;gap:12px}
  .primary-nav{position:absolute;left:0;right:0;top:100%;z-index:85;display:none;max-height:calc(100vh - var(--header-h-compact) - 8px);overflow-y:auto;padding:10px var(--gutter) 22px;background:linear-gradient(180deg,rgba(10,34,51,.99),rgba(4,18,31,.99));border-block:1px solid var(--line);box-shadow:0 30px 50px -34px rgba(0,0,0,.98)}
  .primary-nav[data-open]{display:block}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .primary-nav__item{width:100%}
  .nav-link{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 4px;font-size:16px;border-bottom:1px solid rgba(159,180,196,.13)}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan);background:rgba(34,227,210,.08);padding-inline:12px;border-radius:var(--r-soft)}
  .nav-toggle{display:inline-flex}
  .site-index{left:var(--gutter);right:var(--gutter);width:auto;transform:none;max-height:min(72vh,560px);overflow-y:auto}
}
@media (max-width:900px){
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .grid{gap:clamp(14px,2.4vw,20px)}
}
@media (max-width:700px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-col--brand{grid-column:1 / -1}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px}
  .footer-legal{gap:14px}
}
@media (max-width:640px){
  .index-toggle{display:none}
  .brand__tag{display:none}
  .header-actions{gap:8px}
  .site-index__list{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:420px){
  .brand__mark{width:36px;height:36px;font-size:13px}
  .brand__name{font-size:15px}
  .btn--sm{padding:8px 12px;font-size:12.5px}
  .site-index__list{grid-template-columns:1fr}
}

@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}
}