*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{font-weight:900;line-height:1.18;letter-spacing:.04em}
p{overflow-wrap:break-word}
img,svg{max-width:100%}
button{font:inherit}
:root{
  --c-ink:#120A24;
  --c-ink-2:#24124D;
  --c-black:#08050F;
  --c-cyan:#2DE2E6;
  --c-orange:#FF5A1F;
  --c-gold:#F7C948;
  --c-paper:#F7F2E7;
  --c-haze:#B9A7E8;
  --c-mint:#41D98A;
  --surface:var(--c-ink);
  --surface-raised:var(--c-ink-2);
  --text:var(--c-paper);
  --text-dim:var(--c-haze);
  --line:rgba(185,167,232,.20);
  --line-strong:rgba(185,167,232,.42);
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shell:1320px;
  --gutter:clamp(16px,4vw,56px);
  --radius:2px;
  --dur:340ms;
  --ease:cubic-bezier(.2,.7,.25,1);
}
html,body{min-height:100%}
body{
  background-color:var(--c-ink);
  background-image:
    radial-gradient(120% 58% at 88% -12%,rgba(45,226,230,.16),transparent 62%),
    radial-gradient(86% 46% at -6% 6%,rgba(255,90,31,.14),transparent 60%),
    linear-gradient(180deg,#120A24 0%,#180D33 46%,#0D0719 100%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-body);
  font-size:clamp(15px,1.02vw,17px);
  line-height:1.75;
  font-weight:400;
}
a{color:var(--c-cyan)}
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px;border-radius:2px}
.mono,.rail-mono,.brand-line,.nav-num,.tag,.footer-icp,.breadcrumb-list,.toc-num{font-family:var(--font-mono)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link{
  position:fixed;left:16px;top:-120px;z-index:300;
  padding:11px 20px;background:var(--c-gold);color:var(--c-ink);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;text-decoration:none;
  border:1px solid var(--c-black);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:linear-gradient(180deg,rgba(8,5,15,.99) 0%,rgba(18,10,36,.96) 100%);
  border-bottom:1px solid var(--line-strong);
  color:var(--c-paper);
}
.header-rail{
  display:flex;align-items:center;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;
  padding:6px var(--gutter);
  background-color:var(--c-black);
  background-image:repeating-linear-gradient(90deg,rgba(247,201,72,.10) 0 2px,transparent 2px 9px);
  border-bottom:1px solid rgba(255,90,31,.30);
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;line-height:1.6;
  color:var(--c-haze);
}
.rail-status{display:inline-flex;align-items:center;gap:9px;color:var(--c-paper);margin:0}
.rail-dot{
  width:7px;height:7px;border-radius:50%;background:var(--c-mint);
  box-shadow:0 0 0 3px rgba(65,217,138,.20);
  animation:rail-pulse 2.6s var(--ease) infinite;
}
@keyframes rail-pulse{0%,100%{box-shadow:0 0 0 3px rgba(65,217,138,.20)}50%{box-shadow:0 0 0 6px rgba(65,217,138,.06)}}
.rail-meta{margin:0;color:var(--c-haze)}
.rail-mono{color:var(--c-gold);letter-spacing:.22em;margin-right:6px}
.header-main{
  position:relative;
  width:100%;max-width:var(--shell);margin:0 auto;
  padding:12px var(--gutter) 10px;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(14px,2.4vw,40px);
}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0;text-decoration:none;color:var(--c-paper)}
.brand-mark{display:inline-grid;grid-auto-flow:column;align-items:end;gap:3px;height:30px}
.brand-mark span{display:block;width:5px;border-radius:1px}
.brand-mark span:nth-child(1){height:21px;background:var(--c-orange)}
.brand-mark span:nth-child(2){height:30px;background:var(--c-cyan)}
.brand-mark span:nth-child(3){height:15px;background:var(--c-gold)}
.brand-text{display:flex;flex-direction:column;line-height:1.24;min-width:0}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:clamp(17px,1.55vw,22px);letter-spacing:.18em;white-space:nowrap}
.brand-line{font-size:10.5px;letter-spacing:.1em;color:var(--c-haze);white-space:nowrap}
.brand:hover .brand-name{color:var(--c-cyan)}
.brand:hover .brand-mark span:nth-child(2){background:var(--c-gold)}
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:10px 14px;
  background:rgba(36,18,77,.92);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  color:var(--c-paper);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;
  cursor:pointer;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.nav-toggle[aria-expanded="true"]{background:var(--c-cyan);border-color:var(--c-cyan);color:var(--c-ink)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px}
.nav-toggle-bars span{display:block;height:2px;background:currentColor;transition:transform var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle-text{white-space:nowrap}
.site-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap;margin:0}
.nav-item{min-width:0}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 10px 9px;
  text-decoration:none;color:var(--c-haze);
  font-size:14.5px;font-weight:700;letter-spacing:.06em;line-height:1.4;
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-num{font-size:10px;letter-spacing:.08em;color:rgba(247,201,72,.62);font-weight:400}
.nav-label{white-space:nowrap}
.nav-link:hover{color:var(--c-paper);border-bottom-color:rgba(45,226,230,.55);background:rgba(45,226,230,.07)}
.nav-link:hover .nav-num{color:var(--c-cyan)}
.nav-link[aria-current="page"]{
  color:var(--c-paper);
  border-bottom-color:var(--c-cyan);
  background:linear-gradient(180deg,rgba(45,226,230,0),rgba(45,226,230,.14));
}
.nav-link[aria-current="page"] .nav-num{color:var(--c-gold)}
.header-actions{display:flex;align-items:center;gap:8px;justify-self:end}
.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(45,226,230,.10);pointer-events:none}
.scroll-meter__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-cyan) 0%,var(--c-gold) 58%,var(--c-orange) 100%);
}
.to-top{
  position:fixed;right:clamp(14px,2.4vw,28px);bottom:clamp(14px,2.4vw,28px);z-index:90;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 15px;
  background:rgba(8,5,15,.94);
  border:1px solid rgba(45,226,230,.55);
  border-radius:var(--radius);
  color:var(--c-cyan);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) linear,border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--c-gold);color:var(--c-gold)}
/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:0 0 clamp(18px,2.6vw,30px);
  background:linear-gradient(180deg,#100826 0%,#08050F 78%);
  border-top:1px solid rgba(45,226,230,.24);
  color:var(--c-paper);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:170px;pointer-events:none;
  background:
    radial-gradient(58% 100% at 14% 0%,rgba(255,90,31,.18),transparent 70%),
    radial-gradient(52% 92% at 86% 0%,rgba(45,226,230,.15),transparent 70%);
}
.footer-beam{
  position:relative;height:8px;
  background:linear-gradient(100deg,var(--c-orange) 0 21%,var(--c-gold) 21% 33%,var(--c-cyan) 33% 57%,rgba(45,226,230,.12) 57% 100%);
}
.footer-top,.footer-grid,.footer-bottom{position:relative;z-index:1;width:100%;max-width:var(--shell);margin:0 auto;padding-inline:var(--gutter)}
.footer-top{padding-top:clamp(28px,4vw,52px);display:grid;gap:6px}
.footer-brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(30px,5.4vw,60px);line-height:1;letter-spacing:.16em;
  color:transparent;
  -webkit-text-stroke:1px rgba(247,201,72,.82);
  text-shadow:0 0 28px rgba(255,90,31,.20);
}
.footer-brand-line{font-size:clamp(14px,1.2vw,16px);letter-spacing:.1em;color:rgba(247,242,231,.9);max-width:48ch}
.footer-hours{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--c-mint)}
.footer-grid{
  display:grid;grid-template-columns:1.1fr 1.2fr .8fr;gap:clamp(20px,3vw,46px);
  padding-top:clamp(24px,3.4vw,42px);margin-top:clamp(24px,3.4vw,42px);
  border-top:1px solid var(--line);
}
.footer-col{min-width:0}
.footer-col-title{
  font-family:var(--font-mono);font-weight:400;
  font-size:11px;letter-spacing:.24em;color:var(--c-gold);
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px dashed rgba(247,201,72,.34);
}
.footer-list{display:grid;gap:8px}
.footer-link{
  display:inline-block;color:var(--c-haze);text-decoration:none;font-size:14.5px;letter-spacing:.04em;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--c-cyan);border-bottom-color:var(--c-cyan)}
.contact-row{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:baseline}
.contact-label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:rgba(185,167,232,.72)}
.contact-value{color:rgba(247,242,231,.86);font-size:14.5px;letter-spacing:.03em}
.footer-copy{margin-top:14px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 22px;
  margin-top:clamp(26px,3.6vw,44px);padding-top:16px;
  border-top:1px solid rgba(185,167,232,.16);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:rgba(185,167,232,.82);
}
.footer-meta,.footer-region,.footer-icp{margin:0}
.footer-region{color:var(--c-gold)}
.footer-icp{color:rgba(247,242,231,.7)}
.footer-legal{display:flex;flex-wrap:wrap;gap:6px 16px;margin:0}
.legal-link{
  color:var(--c-haze);text-decoration:none;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  border-bottom:1px solid rgba(185,167,232,.34);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.legal-link:hover{color:var(--c-cyan);border-bottom-color:var(--c-cyan)}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:transparent;color:var(--c-paper);
  font-family:var(--font-body);font-size:14px;font-weight:700;letter-spacing:.08em;line-height:1.3;
  text-decoration:none;cursor:pointer;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--accent{background:var(--c-orange);border-color:var(--c-orange);color:var(--c-ink)}
.btn--accent:hover{background:#FF7440;border-color:#FF7440;color:var(--c-black)}
.btn--ghost{border-color:rgba(45,226,230,.52);color:var(--c-cyan);background:rgba(45,226,230,.05)}
.btn--ghost:hover{background:rgba(45,226,230,.14);color:var(--c-paper);border-color:var(--c-cyan)}
.btn--quiet{border-color:var(--line);color:var(--c-haze);background:rgba(36,18,77,.6)}
.btn--quiet:hover{color:var(--c-paper);border-color:var(--line-strong)}
.btn--sm{padding:8px 13px;font-size:12.5px;letter-spacing:.07em}
.btn[data-copied="true"]{background:var(--c-mint);border-color:var(--c-mint);color:var(--c-ink)}
/* ---------- layout ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:880px}
.container--wide{max-width:1560px}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,24px)}
.grid-12 > *{min-width:0}
.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}
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(18px,3vw,48px);align-items:start}
.stack > * + *{margin-top:clamp(14px,1.6vw,22px)}
.rule{height:1px;border:0;margin-block:clamp(20px,3vw,36px);background:linear-gradient(90deg,var(--c-cyan),rgba(45,226,230,0) 66%)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--c-gold);
  text-transform:uppercase;
}
.eyebrow::before{content:"";display:block;width:26px;height:2px;background:var(--c-orange)}
.lede{font-size:clamp(16px,1.55vw,20px);line-height:1.72;color:rgba(247,242,231,.88);max-width:62ch}
.section-mark{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(52px,10vw,132px);line-height:.82;letter-spacing:-.03em;
  color:transparent;-webkit-text-stroke:1px rgba(247,201,72,.62);
}
/* ---------- surfaces & tags ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2vw,28px);
  background:linear-gradient(180deg,rgba(36,18,77,.92),rgba(18,10,36,.94));
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.panel--paper{background:var(--c-paper);color:var(--c-ink);border-color:rgba(18,10,36,.18)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid currentColor;border-radius:1px;
  font-size:10.5px;font-weight:400;letter-spacing:.16em;line-height:1.7;color:var(--c-haze);
}
.tag--gold{color:var(--c-gold)}
.tag--cyan{color:var(--c-cyan)}
.tag--orange{color:var(--c-orange)}
.tag--mint{color:var(--c-mint)}
/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:16px 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:6px;font-size:12px;letter-spacing:.1em;color:var(--c-haze)}
.breadcrumb-item{display:inline-flex;align-items:center;gap:6px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:rgba(185,167,232,.48)}
.breadcrumb-link{color:var(--c-haze);text-decoration:none;border-bottom:1px dashed rgba(185,167,232,.42);transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.breadcrumb-link:hover{color:var(--c-cyan);border-bottom-color:var(--c-cyan)}
.breadcrumb-current{color:var(--c-gold)}
/* ---------- media frame ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  aspect-ratio:16/10;
  background:linear-gradient(135deg,rgba(45,226,230,.22) 0%,rgba(36,18,77,.92) 46%,rgba(255,90,31,.20) 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(8,5,15,0) 52%,rgba(8,5,15,.62) 100%);
}
.media-frame img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--sliced{clip-path:polygon(0 0,100% 0,100% 84%,0 100%)}
.media-frame__tag{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:6px 12px;background:var(--c-ink);color:var(--c-gold);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
}
/* ---------- toc ---------- */
.toc{display:flex;flex-direction:column;gap:2px}
.toc-link{
  display:flex;align-items:baseline;gap:10px;
  padding:8px 10px;border-left:2px solid transparent;
  color:var(--c-haze);text-decoration:none;font-size:13.5px;letter-spacing:.04em;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.toc-num{font-size:10.5px;color:rgba(247,201,72,.7);letter-spacing:.1em}
.toc-link:hover{color:var(--c-paper);background:rgba(45,226,230,.08)}
.toc-link[aria-current="true"]{
  color:var(--c-paper);border-left-color:var(--c-cyan);
  background:linear-gradient(90deg,rgba(45,226,230,.18),transparent 82%);
}
.toc-link[aria-current="true"] .toc-num{color:var(--c-gold)}
/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 520ms var(--ease),transform 520ms var(--ease)}
[data-reveal][data-revealed="true"]{opacity:1;transform:none}
/* ---------- responsive ---------- */
@media (max-width:980px){
  .header-main{grid-template-columns:1fr auto;gap:10px 14px;padding-top:10px;padding-bottom:10px}
  .nav-toggle{display:inline-flex;justify-self:end}
  .site-nav{grid-column:1/-1;display:none}
  .header-actions{grid-column:1/-1;display:none;justify-self:stretch;flex-wrap:wrap;padding-top:4px}
  .site-header[data-open="true"] .site-nav{display:block}
  .site-header[data-open="true"] .header-actions{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;border-top:1px solid var(--line-strong)}
  .nav-link{width:100%;justify-content:flex-start;padding:14px 8px;font-size:16px;border-bottom:1px solid rgba(185,167,232,.14)}
  .nav-link:hover{border-bottom-color:rgba(185,167,232,.14);background:rgba(45,226,230,.08)}
  .nav-link[aria-current="page"]{
    border-bottom-color:rgba(185,167,232,.14);
    background:linear-gradient(90deg,rgba(45,226,230,.18),transparent 74%);
    box-shadow:inset 3px 0 0 var(--c-cyan);
  }
  .header-actions .btn{flex:1 1 140px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-7,.col-8{grid-column:span 6}
}
@media (max-width:720px){
  .header-rail{font-size:10px;letter-spacing:.1em}
  .rail-meta{display:none}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{justify-content:flex-start}
  .footer-brand-name{letter-spacing:.1em}
  .to-top{padding:10px 12px;font-size:11px}
}
@media (max-width:560px){
  .brand-line{display:none}
  .grid-12{grid-template-columns:1fr}
  .col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:1/-1}
  .contact-row{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none}
  .rail-dot{animation:none}
}