/* 01 — reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
img,svg{max-width:100%;display:block}
[hidden]{display:none!important}

/* 02 — tokens */
:root{
  --canvas:#071426;
  --canvas-2:#0D2138;
  --canvas-3:#12293F;
  --paper:#F4EAD7;
  --paper-2:#EADFC8;
  --ink:#1C1713;
  --ink-soft:#5A4C40;
  --nebula:#6C4BD6;
  --cyan:#3DE0E8;
  --orange:#FF9A3D;
  --red:#E4572E;
  --green:#46D6A8;
  --mist:#A9BED0;
  --line:rgba(169,190,208,.22);
  --line-strong:rgba(169,190,208,.38);
  --line-paper:rgba(28,23,19,.16);
  --radius-lg:26px;
  --radius-md:16px;
  --radius-sm:10px;
  --pill:999px;
  --font-display:"Barlow Condensed","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
}

/* 03 — base */
html{scroll-behavior:smooth}
body{
  background:var(--canvas);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.06;letter-spacing:.005em}
p{max-width:70ch}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* 04 — layout */
.wrap{width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin-inline:auto}
.section{padding-block:clamp(36px,5.5vw,76px)}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:clamp(20px,3vw,34px)}
.grid{display:grid;gap:clamp(16px,2.6vw,32px)}
.grid--4-8{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
@media (max-width:900px){.grid--4-8{grid-template-columns:minmax(0,1fr)}}
.rule{height:1px;border:0;background:var(--line);margin-block:clamp(22px,3.6vw,40px)}

/* 05 — typography helpers */
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;
  color:var(--cyan);text-transform:uppercase;
}
.eyebrow::before{content:"";display:block;width:26px;height:2px;background:linear-gradient(90deg,var(--cyan),transparent)}
.display{font-family:var(--font-display);font-weight:800;line-height:.96;letter-spacing:-.012em;font-size:clamp(38px,6vw,76px);color:var(--paper)}
.lede{font-size:clamp(15px,1.5vw,18px);line-height:1.85;color:var(--mist);max-width:62ch}

/* 06 — surfaces */
.paper-card{
  background:var(--paper);color:var(--ink);
  border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,34px);
  box-shadow:0 24px 60px rgba(3,10,20,.35);
}
.card{
  background:linear-gradient(160deg,var(--canvas-2),var(--canvas));
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(16px,2.4vw,26px);
}

/* 07 — buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:11px 22px;border-radius:var(--pill);border:1px solid transparent;
  font-family:var(--font-body);font-size:14.5px;font-weight:700;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--orange);color:#2A1707;box-shadow:0 8px 24px rgba(255,154,61,.26)}
.btn--primary:hover{background:#FFAE60}
.btn--ghost{background:rgba(255,255,255,.03);border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* 08 — small parts */
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:var(--pill);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--mist);
}
.pill--ok{color:var(--green);border-color:rgba(70,214,168,.42);background:rgba(70,214,168,.1)}
.tag{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:var(--pill);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  background:rgba(108,75,214,.2);border:1px solid rgba(108,75,214,.45);color:#D8CBFF;
}
.paper-card .tag{background:rgba(108,75,214,.13);border-color:rgba(108,75,214,.3);color:#4A2FA8}
.stat{display:grid;gap:2px}
.stat__value{font-family:var(--font-mono);font-size:clamp(22px,3vw,32px);font-weight:600;color:var(--orange);line-height:1.2}
.stat__label{font-size:12px;letter-spacing:.08em;color:var(--mist)}

/* 09 — media frames (page stage drops images here) */
.media-frame{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:linear-gradient(155deg,var(--canvas-3),var(--canvas));
  aspect-ratio:16/9;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame img{width:100%;height:100%;object-fit:cover;position:relative;z-index:1}
.media-frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.45;
  background-image:
    linear-gradient(rgba(169,190,208,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(169,190,208,.14) 1px,transparent 1px);
  background-size:44px 44px;
}

/* 10 — data table */
.data-table{width:100%;border-collapse:collapse;font-size:14px;line-height:1.6}
.data-table caption{text-align:left;padding-bottom:12px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;color:var(--mist)}
.data-table th,.data-table td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.data-table th{font-family:var(--font-mono);font-size:11.5px;font-weight:500;letter-spacing:.12em;color:var(--mist);white-space:nowrap}
.data-table tbody tr:hover td{background:rgba(255,255,255,.035)}
.paper-card .data-table th,.paper-card .data-table td{border-color:var(--line-paper)}
.paper-card .data-table th{color:var(--ink-soft)}
.paper-card .data-table tbody tr:hover td{background:rgba(28,23,19,.05)}

/* 11 — breadcrumb & toc */
.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__list li::after{content:"/";margin-left:8px;color:rgba(169,190,208,.45)}
.breadcrumb__list li:last-child::after{content:"";margin:0}
.breadcrumb a{text-decoration:none;border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.toc{position:sticky;top:104px}
.toc__list{display:grid;gap:2px}
.toc__list a{
  display:block;padding:9px 12px;border-left:2px solid var(--line);
  font-size:13.5px;color:var(--mist);text-decoration:none;transition:color .2s,border-color .2s,background-color .2s;
}
.toc__list a:hover,.toc__list a[aria-current="true"]{color:var(--paper);border-left-color:var(--cyan);background:rgba(61,224,232,.07)}
@media (max-width:900px){.toc{position:static}}

/* 12 — filter bar */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-btn{
  appearance:none;padding:7px 15px;border-radius:var(--pill);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.05em;color:var(--mist);
  cursor:pointer;transition:color .2s,border-color .2s,background-color .2s;
}
.filter-btn:hover{color:var(--paper);border-color:rgba(61,224,232,.5)}
.filter-btn[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:#04222A;font-weight:600}

/* 13 — reveal */
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.is-visible{opacity:1;transform:none}

/* 14 — skip link */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--cyan);color:#04222A;font-weight:700;text-decoration:none;
  transform:translateY(-180%);transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* 15 — header */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--canvas);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header[data-scrolled="true"]{box-shadow:0 18px 44px rgba(2,8,16,.62)}
.scroll-meter{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(169,190,208,.14);overflow:hidden}
.scroll-meter__bar{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--nebula) 55%,var(--orange));
  transition:transform .12s linear;
}

.header-rail{background:var(--canvas-2);border-bottom:1px solid var(--line)}
.header-rail__inner{
  width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin-inline:auto;
  padding:7px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--mist);
}
.header-rail__status{display:flex;align-items:center;gap:10px;flex-wrap:wrap;max-width:none}
.header-rail__dot{
  width:7px;height:7px;border-radius:50%;flex:none;
  background:var(--green);box-shadow:0 0 0 3px rgba(70,214,168,.18);
  animation:railPulse 3.2s ease-in-out infinite;
}
@keyframes railPulse{0%,100%{box-shadow:0 0 0 3px rgba(70,214,168,.18)}50%{box-shadow:0 0 0 6px rgba(70,214,168,.06)}}
.header-rail__sep{color:rgba(169,190,208,.45)}
.header-rail__note{color:var(--mist)}
.header-rail__meta{color:rgba(169,190,208,.72);white-space:nowrap}

.header-bar{
  background-image:
    linear-gradient(rgba(169,190,208,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(169,190,208,.05) 1px,transparent 1px);
  background-size:56px 56px;
}
.header-bar__inner{
  width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin-inline:auto;
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  padding-block:12px;
}

.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper);flex:none}
.brand__glyph{position:relative;display:block;width:34px;height:34px;flex:none}
.brand__glyph i{position:absolute;display:block;border-radius:50%}
.brand__glyph i:nth-child(1){inset:0;border:1.5px solid rgba(61,224,232,.55)}
.brand__glyph i:nth-child(2){width:7px;height:7px;left:5px;top:7px;background:var(--orange);animation:glyphPulse 3.4s ease-in-out infinite}
.brand__glyph i:nth-child(3){width:5px;height:5px;right:7px;bottom:6px;background:var(--cyan)}
@keyframes glyphPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(.72);opacity:.6}}
.brand__text{display:flex;flex-direction:column;gap:1px;line-height:1.1}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.02em}
.brand__sub{font-size:9.5px;letter-spacing:.2em;color:var(--mist);text-transform:uppercase}
.brand:hover .brand__name{color:var(--cyan)}

.site-nav{margin-left:auto;display:flex;align-items:center;gap:10px}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav a{
  display:inline-flex;align-items:baseline;gap:7px;
  padding:10px 12px;border-radius:var(--radius-sm);
  font-size:14px;font-weight:500;color:var(--mist);text-decoration:none;
  transition:color .2s,background-color .2s;
}
.site-nav a:hover{color:var(--paper);background:rgba(255,255,255,.055)}
.site-nav__index{font-size:10px;color:rgba(169,190,208,.55);letter-spacing:.08em}
.site-nav a[aria-current="page"]{color:var(--cyan);background:rgba(61,224,232,.1)}
.site-nav a[aria-current="page"] .site-nav__index{color:var(--orange)}
.site-nav a[aria-current="page"]::after{
  content:"";width:4px;height:4px;border-radius:50%;background:var(--orange);
  align-self:center;
}
.site-nav__cta{margin-left:8px;flex:none}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:8px 15px;border-radius:var(--pill);
  background:transparent;border:1px solid var(--line-strong);color:var(--paper);
  font-size:14px;font-weight:600;cursor:pointer;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:block;width:16px}
.nav-toggle__bars i{display:block;height:2px;background:currentColor;border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.nav-toggle__bars i:first-child{margin-bottom:4px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-3px) rotate(-45deg)}

@media (max-width:980px){
  .nav-toggle{display:inline-flex;margin-left:auto}
  .site-nav{
    display:none;position:absolute;top:100%;left:0;right:0;margin:0;
    flex-direction:column;align-items:stretch;gap:2px;
    padding:14px var(--gutter) 22px;
    background:var(--paper);color:var(--ink);
    border-top:3px solid var(--orange);
    border-radius:0 0 var(--radius-lg) var(--radius-lg);
    box-shadow:0 30px 60px rgba(2,8,16,.6);
  }
  .site-header[data-open="true"] .site-nav{display:flex}
  .site-nav__list{flex-direction:column;align-items:stretch;width:100%;gap:0}
  .site-nav a{
    width:100%;padding:13px 10px;font-size:17px;color:var(--ink);
    border-bottom:1px solid var(--line-paper);border-radius:0;
  }
  .site-nav a:hover{background:rgba(28,23,19,.06);color:var(--ink)}
  .site-nav a[aria-current="page"]{color:var(--ink);background:rgba(108,75,214,.14);box-shadow:inset 3px 0 0 var(--orange)}
  .site-nav a[aria-current="page"]::after{display:none}
  .site-nav__index{color:rgba(28,23,19,.5)}
  .site-nav a[aria-current="page"] .site-nav__index{color:var(--nebula)}
  .site-nav__cta{margin:16px 0 0;width:100%;justify-content:center}
  .header-rail__note{display:none}
}
@media (max-width:560px){
  .header-rail__inner{font-size:10.5px}
  .brand__name{font-size:17px}
  .brand__glyph{width:30px;height:30px}
}

/* 16 — footer */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  color:var(--mist);
  background:
    radial-gradient(circle at 12% 4%,rgba(108,75,214,.24),transparent 44%),
    radial-gradient(circle at 88% 0%,rgba(61,224,232,.14),transparent 42%),
    var(--canvas-2);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--nebula) 45%,var(--orange));
  opacity:.75;
}
.footer-top{
  width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin-inline:auto;
  padding:clamp(38px,5.5vw,72px) 0 clamp(28px,4vw,48px);
  display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(24px,4vw,56px);align-items:start;
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:0}
.brand--footer .brand__name{font-size:22px}
.footer-intro{
  color:var(--paper);font-size:16.5px;line-height:1.75;max-width:28ch;
  margin:18px 0 22px;
}
.footer-cta{margin-top:2px}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,36px)}
.footer-col__title{
  font-family:var(--font-display);font-size:13px;font-weight:800;
  letter-spacing:.14em;color:var(--paper);
  padding-bottom:10px;margin-bottom:14px;border-bottom:1px solid var(--line);
}
.footer-col__list{display:grid;gap:10px}
.footer-col__list a{
  font-size:14.5px;color:var(--mist);text-decoration:none;
  transition:color .2s ease,transform .2s ease;display:inline-block;
}
.footer-col__list a:hover{color:var(--cyan);transform:translateX(3px)}

.footer-contact{
  width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin:0 auto clamp(24px,3.5vw,38px);
  background:var(--paper);color:var(--ink);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.6vw,26px) clamp(18px,2.6vw,30px);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:18px 26px;
}
.footer-contact__item{display:grid;gap:3px}
.footer-contact__label{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:#7B6A57}
.footer-contact__value{font-size:15px;line-height:1.6;color:var(--ink);word-break:break-word;max-width:none}

.footer-base{
  width:min(var(--wrap),calc(100% - 2 * var(--gutter)));margin-inline:auto;
  padding:18px 0 clamp(28px,4vw,44px);border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:rgba(169,190,208,.75);
}
.footer-base__note{max-width:none}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-legal a{text-decoration:none;color:var(--mist)}
.footer-legal a:hover{color:var(--cyan)}

@media (max-width:900px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-base{font-size:11.5px}
}

/* 17 — motion preferences */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  html.js .reveal{opacity:1;transform:none}
  .btn:hover{transform:none}
  .footer-col__list a:hover{transform:none}
}