/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ============ tokens ============ */
:root{
  --ink:#080A0B;
  --panel:#121619;
  --acid:#B7FF2A;
  --track:#FF5A1F;
  --blue:#3D8BFF;
  --mist:#F4F7F1;
  --steel:#7D898F;
  --teal:#4BE3D0;
  --alert:#FF4D4D;
  --line:rgba(183,255,42,0.16);
  --line-soft:rgba(244,247,241,0.10);
  --acid-veil:rgba(183,255,42,0.12);
  --font-display:"Oswald","Noto Sans SC","PingFang SC",sans-serif;
  --font-serif:"Noto Serif SC","Songti SC",Georgia,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,monospace;
  --shell-max:1320px;
  --gutter:clamp(16px,4vw,56px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ============ base ============ */
body{
  background:var(--ink);
  color:var(--mist);
  font-family:var(--font-body);
  font-size:clamp(16px,0.55vw + 14px,18px);
  font-weight:400;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3{font-family:var(--font-display);font-weight:700;line-height:1.05;letter-spacing:-.02em}
::selection{background:var(--acid);color:var(--ink)}
:focus-visible{outline:2px solid var(--acid);outline-offset:3px}

.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--gutter)}
.skip-link{position:fixed;top:8px;left:8px;z-index:200;padding:10px 18px;background:var(--acid);color:var(--ink);font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;transform:translateY(-200%);transition:transform .2s var(--ease)}
.skip-link:focus{transform:translateY(0)}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 26px;font-family:var(--font-display);font-size:15px;font-weight:700;letter-spacing:.08em;line-height:1.2;border:1px solid transparent;border-radius:0;cursor:pointer;transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.btn--primary{background:var(--acid);color:var(--ink);border-color:var(--acid)}
.btn--primary:hover{background:var(--mist);border-color:var(--mist);transform:translateY(-2px)}
.btn--ghost{background:rgba(183,255,42,.04);color:var(--mist);border-color:var(--line)}
.btn--ghost:hover{color:var(--acid);border-color:var(--acid);background:var(--acid-veil)}
.btn--small{padding:9px 16px;font-size:12px;letter-spacing:.12em}

/* ============ tags ============ */
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--line-soft);font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;line-height:1.6;color:var(--steel);background:transparent}
.tag--acid{color:var(--acid);border-color:rgba(183,255,42,.42);background:rgba(183,255,42,.10)}
.tag--orange{color:var(--track);border-color:rgba(255,90,31,.42);background:rgba(255,90,31,.10)}
.tag--blue{color:var(--blue);border-color:rgba(61,139,255,.42);background:rgba(61,139,255,.10)}
.tag--teal{color:var(--teal);border-color:rgba(75,227,208,.40);background:rgba(75,227,208,.10)}
.tag--alert{color:var(--alert);border-color:rgba(255,77,77,.42);background:rgba(255,77,77,.10)}

/* ============ layout helpers ============ */
.section{padding-block:clamp(56px,7vw,120px)}
.section--tight{padding-block:clamp(32px,4vw,64px)}
.stack{display:grid;gap:clamp(16px,2vw,28px)}
.rule{height:1px;border:0;margin:0;background:var(--line)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--acid)}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--acid)}
.lead{max-width:62ch;font-size:clamp(17px,1.3vw,20px);line-height:1.85;color:rgba(244,247,241,.9)}

.grid{display:grid;gap:clamp(20px,3vw,40px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}

.section-head{display:grid;grid-template-columns:auto 1fr;gap:10px 20px;align-items:end;padding-bottom:16px;margin-bottom:clamp(26px,3.5vw,52px);border-bottom:1px solid var(--line)}
.section-head__index{font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--acid)}
.section-head__title{font-family:var(--font-display);font-size:clamp(28px,3.6vw,48px);font-weight:700;line-height:1.05;letter-spacing:-.02em}
.section-head__note{grid-column:2;font-size:14px;line-height:1.8;color:var(--steel)}

/* ============ panels ============ */
.panel{position:relative;background:var(--panel);border:1px solid var(--line-soft);padding:clamp(20px,3vw,38px);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.panel:hover{transform:translateY(-3px);border-color:var(--line);box-shadow:0 22px 44px -30px rgba(0,0,0,.95)}
.panel--offset{margin-left:clamp(0px,3vw,56px)}
.panel--acid{border-left:2px solid var(--acid)}
.panel--orange{border-left:2px solid var(--track)}
.panel__label{display:block;margin-bottom:12px;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--steel)}

/* ============ stats ============ */
.stat{display:grid;gap:6px}
.stat__value{font-family:var(--font-mono);font-size:clamp(28px,3vw,48px);font-weight:500;line-height:1;letter-spacing:.02em;color:var(--acid)}
.stat__label{font-size:13px;line-height:1.7;color:var(--steel)}

/* ============ breadcrumb ============ */
.breadcrumb{padding-block:18px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--steel)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item:not(:first-child)::before{content:"›";color:var(--steel)}
.breadcrumb__link{color:var(--steel);transition:color .2s var(--ease)}
.breadcrumb__link:hover{color:var(--acid)}
.breadcrumb__current{color:var(--mist)}

/* ============ prose ============ */
.prose{max-width:70ch;font-size:17px;line-height:1.95;color:rgba(244,247,241,.88)}
.prose > * + *{margin-top:1.05em}
.prose h2{font-family:var(--font-serif);font-weight:600;font-size:clamp(22px,2.4vw,30px);line-height:1.4;color:var(--mist);margin-top:1.9em;letter-spacing:0}
.prose h3{font-family:var(--font-display);font-size:18px;letter-spacing:.02em;color:var(--mist);margin-top:1.6em}
.prose a{color:var(--acid);border-bottom:1px solid var(--line);transition:border-color .2s var(--ease)}
.prose a:hover{border-bottom-color:var(--acid)}
.prose ul{display:grid;gap:.55em}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{content:"";position:absolute;left:2px;top:.82em;width:8px;height:1px;background:var(--acid)}
.prose strong{color:var(--mist);font-weight:600}
.prose code{font-family:var(--font-mono);font-size:.9em;color:var(--teal);background:rgba(75,227,208,.08);padding:2px 6px}

/* ============ media frames ============ */
.media-frame{position:relative;overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,var(--panel) 0%,#0E1214 55%,rgba(61,139,255,.16) 100%);border:1px solid var(--line-soft)}
.media-frame::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(115deg,transparent 38%,rgba(183,255,42,.14) 50%,transparent 62%)}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame__img{width:100%;height:100%;object-fit:cover;display:block}
.media-frame__caption{position:absolute;left:0;right:0;bottom:0;padding:10px 14px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);background:rgba(8,10,11,.78);border-top:1px solid var(--line-soft)}

/* ============ side anchors ============ */
.side-anchors{position:sticky;top:clamp(96px,14vh,168px);align-self:start;display:grid;gap:2px;padding-left:14px;border-left:1px solid var(--line-soft)}
.side-anchors__title{margin-bottom:8px;font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--steel)}
.side-anchors__list{display:grid;gap:2px}
.side-anchors__link{display:block;padding:8px 0;font-size:14px;line-height:1.6;color:var(--steel);transition:color .2s var(--ease)}
.side-anchors__link:hover{color:var(--mist)}
.side-anchors__link.is-active{color:var(--acid);font-weight:500}

/* ============ reveal ============ */
[data-reveal]{transition:opacity .55s var(--ease),transform .55s var(--ease)}
[data-reveal].is-reveal-pending{opacity:0;transform:translateY(18px)}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ============ header ============ */
.site-header{position:relative;z-index:90;background:var(--ink);border-bottom:1px solid var(--line)}
.status-bar{background:var(--panel);border-bottom:1px solid var(--line)}
.status-bar__inner{display:flex;align-items:center;gap:clamp(10px,2vw,26px);min-height:40px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;line-height:1.6;color:var(--steel)}
.status-bar__tag{display:inline-flex;align-items:center;gap:8px;max-width:460px;overflow:hidden;white-space:nowrap;transition:opacity .25s var(--ease),max-width .3s var(--ease)}
.status-bar__dot{width:6px;height:6px;flex:none;background:var(--acid);box-shadow:0 0 0 3px rgba(183,255,42,.18)}
.status-bar__tag--alt{color:var(--mist)}
.status-bar__link{margin-left:auto;padding-bottom:2px;color:var(--acid);white-space:nowrap;border-bottom:1px solid var(--line);transition:color .2s var(--ease),border-color .2s var(--ease)}
.status-bar__link:hover{color:var(--mist);border-color:var(--mist)}
.site-header.is-condensed .status-bar__tag--alt,
.site-header.is-condensed .status-bar__link{max-width:0;opacity:0;pointer-events:none;border-bottom-color:transparent}

.masthead{position:relative;background:repeating-linear-gradient(115deg,var(--line) 0 1px,transparent 1px 96px),radial-gradient(120% 150% at 50% -30%,rgba(61,139,255,.12),transparent 62%),var(--panel);border-bottom:1px solid var(--line-soft)}
.masthead__inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:clamp(12px,2vw,28px);padding-block:clamp(14px,2.2vw,24px);transition:padding-block .3s var(--ease)}
.masthead__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--steel)}
.masthead__meta-item{display:block;white-space:nowrap}
.masthead__aside{display:flex;justify-content:flex-end;align-items:center}
.brand{display:inline-flex;flex-direction:column;align-items:center;gap:7px;justify-self:center;text-align:center}
.brand__mark{display:inline-flex;align-items:baseline;gap:.16em;font-family:var(--font-display);font-weight:800;font-size:clamp(24px,3.6vw,38px);line-height:1;letter-spacing:-.02em;color:var(--mist)}
.brand__k1{color:var(--acid)}
.brand__tagline{position:relative;display:block;width:min(280px,64vw);height:1.15em;overflow:hidden;font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--steel);transition:height .25s var(--ease),opacity .2s var(--ease)}
.brand__tagline-item{position:absolute;inset:0;opacity:0;transform:translateY(4px);white-space:nowrap;text-align:center;transition:opacity .45s var(--ease),transform .45s var(--ease)}
.brand__tagline-item.is-active{opacity:1;transform:none}

.nav-bar{position:relative;background:var(--ink);border-bottom:1px solid var(--line-soft)}
.nav-bar__inner{position:relative;display:flex;align-items:center;gap:clamp(8px,1.5vw,20px);min-height:58px}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;align-items:center;justify-content:center;gap:clamp(2px,1.6vw,26px)}
.site-nav__link{position:relative;display:inline-block;padding:17px 6px;font-size:15px;font-weight:500;letter-spacing:.05em;color:var(--mist);transition:color .2s var(--ease)}
.site-nav__link::after{content:"";position:absolute;left:6px;right:6px;bottom:9px;height:2px;background:var(--acid);transform:scaleX(0);transform-origin:left center;transition:transform .24s var(--ease)}
.site-nav__link:hover{color:var(--acid)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--acid)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.nav-quick{display:flex;align-items:center;gap:8px;font-family:var(--font-mono)}
.nav-quick__link{padding:6px 10px;border:1px solid var(--line);color:var(--steel);font-size:11px;letter-spacing:.1em;line-height:1.5;white-space:nowrap;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
.nav-quick__link:hover{color:var(--acid);border-color:var(--acid);background:var(--acid-veil)}

.nav-toggle{display:none;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);color:var(--mist);transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
.nav-toggle:hover{color:var(--acid);border-color:var(--acid);background:var(--acid-veil)}
.nav-toggle__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;background:currentColor;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(244,247,241,.06);pointer-events:none}
.scroll-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--acid),var(--teal) 55%,var(--blue));transition:width .12s linear}

/* ============ footer ============ */
.site-footer{margin-top:clamp(40px,6vw,96px);background:var(--ink);border-top:1px solid var(--line)}
.footer-top{background:linear-gradient(115deg,rgba(183,255,42,.08),transparent 48%),var(--panel);border-bottom:1px solid var(--line)}
.footer-top__inner{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:18px 40px;align-items:end;padding-block:clamp(28px,4vw,52px)}
.footer-manifesto{font-family:var(--font-serif);font-weight:600;font-size:clamp(19px,2.3vw,30px);line-height:1.55;letter-spacing:0;color:var(--mist)}
.footer-service{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;line-height:1.9;color:var(--steel);text-align:right}
.footer-grid{display:grid;grid-template-columns:1.5fr .9fr .9fr 1.4fr;gap:clamp(24px,3vw,48px);padding-block:clamp(36px,5vw,64px)}
.footer-col{min-width:0}
.footer-col--brand{display:grid;gap:10px;align-content:start}
.footer-col--links,.footer-col--legal{min-width:0}
.footer-col--contact{min-width:0}
.footer-brand__mark{display:inline-block;font-family:var(--font-display);font-weight:800;font-size:clamp(24px,3vw,36px);line-height:1.1;letter-spacing:-.02em;color:var(--mist);transition:color .2s var(--ease)}
.footer-brand__mark:hover{color:var(--acid)}
.footer-brand__line{max-width:34ch;font-size:15px;line-height:1.85;color:var(--steel)}
.footer-col__title{padding-bottom:10px;margin-bottom:14px;border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--acid)}
.footer-list{display:grid;gap:10px}
.footer-link{position:relative;display:inline-block;padding-left:14px;font-size:15px;color:var(--mist);transition:color .2s var(--ease)}
.footer-link::before{content:"";position:absolute;left:0;top:.85em;width:6px;height:1px;background:var(--steel);transition:width .2s var(--ease),background-color .2s var(--ease)}
.footer-link:hover{color:var(--acid)}
.footer-link:hover::before{width:10px;background:var(--acid)}

.contact-list{display:grid;gap:12px}
.contact-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 12px;align-items:center;padding-bottom:10px;border-bottom:1px dashed var(--line-soft)}
.contact-row__label{grid-column:1 / -1;font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--steel)}
.contact-row__value{font-family:var(--font-mono);font-size:13px;line-height:1.7;color:var(--mist);word-break:break-all}
.copy-btn{justify-self:end;padding:4px 10px;border:1px solid var(--line);font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--steel);transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease)}
.copy-btn:hover{color:var(--ink);background:var(--acid);border-color:var(--acid)}
.copy-btn.is-copied{color:var(--ink);background:var(--teal);border-color:var(--teal)}
.copy-status{min-height:1.5em;margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--acid)}

.footer-legal{background:var(--ink);border-top:1px solid var(--line-soft)}
.footer-legal__inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;padding-block:20px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--steel)}
.legal-links{display:flex;flex-wrap:wrap;gap:18px}
.legal-link{color:var(--steel);transition:color .2s var(--ease)}
.legal-link:hover{color:var(--acid)}
.footer-icp{color:var(--steel)}
.footer-copy{margin-left:auto;color:var(--steel)}

/* ============ responsive ============ */
@media (min-width:961px){
  .site-header{position:sticky;top:0}
  .site-header.is-condensed .masthead__inner{padding-block:8px}
  .site-header.is-condensed .brand__tagline{height:0;opacity:0}
}

@media (max-width:1180px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:1080px){
  .masthead__meta{opacity:0;pointer-events:none}
  .site-nav__link{font-size:14px;padding:15px 4px}
  .grid--split{grid-template-columns:1fr}
}

@media (max-width:960px){
  .site-header{position:relative}
  .nav-bar__inner{justify-content:space-between;min-height:54px}
  .nav-toggle{display:inline-flex}
  .site-nav{position:absolute;top:100%;left:0;right:0;z-index:80;display:none;flex:0 0 auto;background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 28px 50px -26px rgba(0,0,0,.95)}
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:6px var(--gutter) 12px}
  .site-nav__link{display:block;padding:14px 2px;font-size:16px;border-bottom:1px solid var(--line-soft)}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{padding-left:12px;box-shadow:inset 2px 0 0 var(--acid)}
  .grid--2,.grid--3{grid-template-columns:1fr}
  .panel--offset{margin-left:0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col--contact{grid-column:auto}
  .footer-top__inner{grid-template-columns:1fr}
  .footer-service{text-align:left}
}

@media (max-width:720px){
  .masthead__inner{grid-template-columns:1fr;justify-items:center;gap:10px;padding-block:14px}
  .masthead__meta{display:none}
  .masthead__aside{justify-content:center}
  .status-bar__inner{min-height:36px;font-size:10px}
  .status-bar__link{display:none}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-col--contact{grid-column:auto}
  .footer-copy{margin-left:0}
  .section-head{grid-template-columns:1fr}
  .section-head__note{grid-column:1}
  .side-anchors{position:static;border-left:0;padding-left:0;border-top:1px solid var(--line-soft);padding-top:12px}
}

@media (max-width:560px){
  .nav-quick{gap:6px}
  .nav-quick__link{padding:5px 8px;font-size:10px;letter-spacing:.06em}
  .nav-toggle__label{display:none}
  .brand__mark{font-size:24px}
  .footer-legal__inner{font-size:10px}
}

@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}
  .panel:hover,.btn--primary:hover{transform:none}
  [data-reveal].is-reveal-pending{opacity:1;transform:none}
}