/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video{display:block;max-width:100%}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--paper)}
::selection{background:var(--cyan);color:#04120d}

/* ============ tokens ============ */
:root{
  --ink:#06120E;
  --ink-2:#0C241D;
  --ink-3:#16382E;
  --cyan:#38F2C4;
  --orange:#FF6B2C;
  --paper:#F3EEDF;
  --mist:#93AFA4;
  --rule:#2C4E44;
  --tag:#E4DAC3;
  --cyan-soft:rgba(56,242,196,.14);
  --orange-soft:rgba(255,107,44,.16);
  --neon:linear-gradient(90deg,#38F2C4,#FF6B2C);
  --font-display:"Noto Sans SC Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SF Mono",Menlo,Consolas,"Courier New",monospace;
  --wrap:1240px;
  --rail:88px;
  --dur:180ms;
  --shadow-paper:0 1px 0 var(--rule),0 10px 0 -6px rgba(44,78,68,.55);
}

/* ============ base ============ */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 80% at 82% -12%,rgba(56,242,196,.10),transparent 62%),
    radial-gradient(90% 70% at -12% 4%,rgba(255,107,44,.09),transparent 58%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:2px}
#main-content:focus{outline:none}
.wrap{width:min(100% - 2.25rem,var(--wrap));margin-inline:auto}
.section{padding:clamp(2.4rem,6vw,4.5rem) 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:.55rem;margin:0 0 .9rem;font:600 11px/1 var(--font-mono);letter-spacing:.22em;color:var(--cyan);text-transform:uppercase}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--neon)}
.annotation{writing-mode:vertical-rl;font:600 12px/1 var(--font-mono);letter-spacing:.3em;color:var(--cyan);opacity:.9}
.prose{max-width:38em;font-size:1.02rem;line-height:1.85;color:rgba(243,238,223,.88)}
.prose p{margin:0 0 1rem}
.prose strong{color:var(--paper)}
.prose a{text-decoration:underline;text-decoration-color:rgba(56,242,196,.5);text-underline-offset:3px}
.grid{display:grid;gap:clamp(1rem,2.4vw,2rem)}
.grid-split{display:grid;gap:clamp(1.25rem,3vw,2.5rem);grid-template-columns:1fr}
@media (min-width:860px){.grid-split{grid-template-columns:5fr 7fr}}

/* ============ skip link ============ */
.skip-link{
  position:fixed;top:.5rem;left:.5rem;z-index:200;
  transform:translateY(-180%);
  padding:.6rem 1rem;
  background:var(--cyan);color:#04120d;
  font:700 14px/1 var(--font-body);
  border-radius:2px;
  transition:transform var(--dur) ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);color:#04120d}

/* ============ header shell ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,18,14,.95);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
}
.scroll-meter{position:absolute;left:0;right:0;top:0;height:2px;background:rgba(44,78,68,.7)}
.scroll-meter-fill{display:block;height:100%;width:0;background:var(--neon);transition:width 80ms linear}

.header-utility{
  overflow:hidden;max-height:46px;opacity:1;
  background:var(--ink-2);
  border-bottom:1px solid var(--rule);
  transition:max-height var(--dur) ease,opacity var(--dur) ease;
}
.site-header[data-stuck="true"] .header-utility{max-height:0;opacity:0;border-bottom-color:transparent}
.utility-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.4rem 1rem;padding:.4rem 0}
.utility-note{margin:0;font:600 11px/1.5 var(--font-mono);letter-spacing:.16em;color:var(--mist)}
.utility-links{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem}
.utility-link{
  display:inline-block;padding:.18rem .5rem;
  font:500 12px/1.5 var(--font-mono);letter-spacing:.04em;
  color:var(--mist);border:1px solid transparent;border-radius:2px;
  transition:color var(--dur) ease,background-color var(--dur) ease,border-color var(--dur) ease;
}
.utility-link:hover{color:var(--paper);background:var(--ink-3);border-color:var(--rule)}
.utility-contact{color:var(--orange);border-color:rgba(255,107,44,.4)}
.utility-contact:hover{color:#150702;background:var(--orange);border-color:var(--orange)}

.header-main{padding:.55rem 0;transition:padding var(--dur) ease}
.site-header[data-stuck="true"] .header-main{padding:.3rem 0}
.header-inner{display:flex;flex-wrap:wrap;align-items:center;gap:.65rem 1rem}

.brand{order:1;display:inline-flex;align-items:center;gap:.6rem;flex:0 0 auto;color:var(--paper)}
.brand:hover{color:var(--paper)}
.brand-mark{
  display:grid;place-items:center;width:44px;height:42px;
  background:var(--cyan);color:#04120d;
  font:800 17px/1 var(--font-display);letter-spacing:-.02em;
  transform:skewX(-8deg);
  border:1px solid rgba(243,238,223,.4);
  box-shadow:3px 3px 0 rgba(255,107,44,.6);
}
.brand-text{display:flex;flex-direction:column;gap:.15rem}
.brand-name{font:800 19px/1.1 var(--font-display);letter-spacing:-.02em}
.brand-note{font:500 11px/1.3 var(--font-mono);letter-spacing:.08em;color:var(--mist)}

.nav-toggle{
  order:2;margin-left:auto;
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.5rem .7rem;
  background:var(--ink-3);color:var(--paper);
  border:1px solid var(--rule);border-radius:2px;
  font:700 13px/1 var(--font-body);cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle[aria-expanded="true"]{background:var(--cyan);color:#04120d;border-color:var(--cyan)}
.nav-toggle-label{letter-spacing:.06em}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px}
.nav-toggle-bars i{display:block;width:16px;height:2px;background:currentColor;transition:transform var(--dur) ease,opacity var(--dur) ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-5px) rotate(-45deg)}

.command-bar{
  order:3;flex:1 1 100%;min-width:0;
  display:flex;align-items:center;gap:.4rem;
  padding:.25rem .5rem;
  background:var(--ink-3);
  border:1px solid var(--rule);border-radius:2px;
  transition:border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.command-bar:focus-within{border-color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(56,242,196,.55)}
.command-label{
  flex:0 0 auto;padding:.15rem .45rem .15rem 0;
  font:600 11px/1 var(--font-mono);letter-spacing:.16em;color:var(--cyan);
  border-right:1px solid var(--rule);white-space:nowrap;
}
.command-input{
  flex:1 1 auto;min-width:0;padding:.25rem 0;
  background:transparent;border:0;
  font:500 13px/1.6 var(--font-mono);letter-spacing:.02em;color:var(--paper);
}
.command-input::placeholder{color:var(--mist)}
.command-input:focus{outline:none}
.command-status{
  flex:0 0 auto;padding:.18rem .4rem;
  font:600 11px/1 var(--font-mono);letter-spacing:.08em;color:var(--cyan);
  background:rgba(56,242,196,.08);
  border:1px solid var(--rule);border-radius:2px;
  transition:color var(--dur) ease,border-color var(--dur) ease,background-color var(--dur) ease;
}
.command-status[data-empty="true"]{color:#150702;background:var(--orange);border-color:var(--orange)}

.site-nav{order:4;flex:1 1 100%;min-width:0;max-height:0;overflow:hidden;visibility:hidden;opacity:0;
  transition:max-height 220ms ease,opacity 160ms ease,visibility 0s linear 200ms}
.site-nav[data-open="true"]{max-height:34rem;overflow:auto;visibility:visible;opacity:1;
  transition:max-height 220ms ease,opacity 160ms ease}
.nav-list{display:flex;flex-wrap:wrap;gap:.2rem;counter-reset:navidx;padding:.15rem 0}
.nav-item{counter-increment:navidx}
.nav-item[hidden]{display:none}
.nav-link{
  display:flex;align-items:baseline;gap:.45rem;
  padding:.4rem .6rem;
  font:600 14px/1.4 var(--font-body);letter-spacing:.01em;color:var(--paper);
  border:1px solid transparent;border-radius:2px;
  transition:color var(--dur) ease,background-color var(--dur) ease,border-color var(--dur) ease;
}
.nav-link::before{content:"0" counter(navidx);font:600 10px/1 var(--font-mono);letter-spacing:.08em;color:var(--cyan)}
.nav-link:hover{color:var(--paper);background:var(--ink-3);border-color:var(--rule)}
.nav-link[aria-current="page"]{background:var(--cyan-soft);border-color:rgba(56,242,196,.55);color:var(--cyan)}
.nav-link[aria-current="page"]::before{color:var(--orange)}
.nav-empty{margin:.4rem 0 .6rem;font:500 12px/1.6 var(--font-mono);color:var(--orange)}
.nav-empty[hidden]{display:none}

.header-cta{order:5;flex:0 0 auto}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.6rem 1.1rem;
  font:700 14px/1.2 var(--font-body);letter-spacing:.02em;
  border:1px solid transparent;border-radius:2px;
  cursor:pointer;
  transition:transform var(--dur) ease,background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.btn-primary{background:var(--orange);color:#150702;border-color:var(--orange);box-shadow:3px 3px 0 rgba(56,242,196,.4)}
.btn-primary:hover{background:var(--cyan);color:#04120d;border-color:var(--cyan);box-shadow:3px 3px 0 rgba(255,107,44,.55);transform:translate(-1px,-1px)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--rule)}
.btn-ghost:hover{color:var(--cyan);border-color:var(--cyan);background:rgba(56,242,196,.08)}
.btn-block{width:100%}

/* ============ scoreboard ============ */
.scoreboard{background:var(--ink-2);border-top:1px solid var(--rule);overflow:hidden}
.scoreboard-inner{
  display:flex;align-items:center;gap:1.1rem;
  padding:.32rem 0;
  font:600 11px/1 var(--font-mono);letter-spacing:.12em;color:var(--mist);
  white-space:nowrap;overflow-x:auto;scrollbar-width:none;
}
.scoreboard-inner::-webkit-scrollbar{display:none}
.scoreboard-inner::before{content:"";flex:0 0 auto;width:6px;height:14px;background:var(--neon)}
.score-cell{display:inline-flex;align-items:baseline;gap:.35rem}
.score-key{font-size:10px;letter-spacing:.2em;color:rgba(147,175,164,.8)}
.score-val{font-size:12px;letter-spacing:.1em;color:var(--cyan)}
.score-cell:nth-child(3n) .score-val{color:var(--orange)}
.score-cell:nth-child(4n) .score-val{color:var(--paper)}

/* ============ footer ============ */
.site-footer{
  margin-top:clamp(2.5rem,6vw,4.5rem);
  padding:clamp(2rem,5vw,3rem) 0 1.5rem;
  background:var(--ink-2);
  border-top:1px solid var(--rule);
  color:var(--paper);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2rem}
@media (min-width:820px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:2.5rem}
  .footer-col+.footer-col{border-left:1px solid var(--rule);padding-left:2.5rem}
}
.footer-title{
  margin:0 0 1rem;
  font:700 12px/1 var(--font-mono);letter-spacing:.24em;color:var(--cyan);
}
.footer-list{counter-reset:svc;display:grid;gap:.6rem}
.footer-list li{position:relative;padding-left:2.5rem;font:500 15px/1.65 var(--font-body);color:rgba(243,238,223,.9)}
.footer-list li::before{
  counter-increment:svc;content:"0" counter(svc);
  position:absolute;left:0;top:.05em;
  font:600 11px/1.9 var(--font-mono);letter-spacing:.1em;color:var(--mist);
}
.download-card{
  display:block;padding:1.05rem 1.15rem;
  background:var(--ink-3);color:var(--paper);
  border:1px solid var(--rule);border-radius:2px;
  box-shadow:var(--shadow-paper);
  transition:transform var(--dur) ease,border-color var(--dur) ease,background-color var(--dur) ease,box-shadow var(--dur) ease;
}
.download-card:hover,.download-card:focus-visible{
  color:var(--paper);background:#1b4336;border-color:var(--cyan);
  transform:translate(-2px,-2px);
  box-shadow:0 1px 0 var(--cyan),0 12px 0 -6px rgba(56,242,196,.35);
}
.download-label{display:block;font:800 17px/1.3 var(--font-display);letter-spacing:-.01em;margin-bottom:.35rem}
.download-label::after{content:"↗";margin-left:.45rem;color:var(--orange);font-family:var(--font-mono)}
.download-note{display:block;font:500 12.5px/1.7 var(--font-mono);color:var(--mist)}
.footer-meta{margin-top:2rem;padding-top:1.2rem;border-top:1px solid var(--rule);display:grid;gap:.7rem}
.footer-meta-row{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.6rem 1.5rem}
.footer-brand{font:800 16px/1.3 var(--font-display);letter-spacing:-.01em}
.footer-brand-note{margin-left:.6rem;font:500 11px/1.4 var(--font-mono);letter-spacing:.14em;color:var(--mist)}
.footer-legal{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.legal-link{
  font:500 12px/1.6 var(--font-mono);letter-spacing:.06em;color:var(--mist);
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color var(--dur) ease,border-color var(--dur) ease;
}
.legal-link:hover{color:var(--cyan);border-color:var(--cyan)}
.footer-contact{font:500 12.5px/1.9 var(--font-mono);letter-spacing:.02em;color:rgba(147,175,164,.95)}
.footer-copy{font:500 11.5px/1.8 var(--font-mono);letter-spacing:.08em;color:var(--mist)}

/* ============ page-level shared parts ============ */
.panel{
  background:var(--ink-2);
  border:1px solid var(--rule);border-radius:2px;
  padding:clamp(1rem,2.2vw,1.5rem);
  box-shadow:var(--shadow-paper);
}
.tag{
  display:inline-block;padding:.2rem .5rem;
  background:var(--tag);color:#12281f;
  font:700 11px/1.4 var(--font-mono);letter-spacing:.1em;border-radius:1px;
}
.tag--cyan{background:var(--cyan);color:#04120d}
.tag--orange{background:var(--orange);color:#150702}
.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.3rem .65rem;
  background:rgba(22,56,46,.6);
  border:1px solid var(--rule);border-radius:999px;
  font:500 12px/1.4 var(--font-mono);letter-spacing:.04em;color:var(--mist);
  transition:color var(--dur) ease,border-color var(--dur) ease,background-color var(--dur) ease;
}
.chip:hover{color:var(--cyan);border-color:var(--cyan);background:rgba(56,242,196,.1)}

.breadcrumb{margin:0 0 1.25rem;font:500 12px/1.5 var(--font-mono);color:var(--mist)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem}
.breadcrumb-list li+li::before{content:"/";margin-right:.35rem;color:var(--rule)}
.breadcrumb-link{color:var(--mist);transition:color var(--dur) ease}
.breadcrumb-link:hover{color:var(--cyan)}
.breadcrumb-current{color:var(--paper)}

/* image containers (page stage drops <img> or .media-placeholder inside) */
.media{
  position:relative;display:block;overflow:hidden;
  background:var(--ink-3);
  border:1px solid var(--rule);border-radius:2px;
  box-shadow:var(--shadow-paper);
}
.media-img{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;filter:saturate(.95) contrast(1.05)}
.media--wide .media-img,.media--wide .media-placeholder{aspect-ratio:21/9}
.media--tall .media-img,.media--tall .media-placeholder{aspect-ratio:4/5}
.media--square .media-img,.media--square .media-placeholder{aspect-ratio:1/1}
.media-frame{padding:.5rem;background:var(--tag);border:1px solid #c9bda1;border-radius:2px}
.media-frame .media{border-color:rgba(19,42,34,.4);box-shadow:none}
.media-caption{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.4rem .9rem;margin-top:.55rem;font:500 11px/1.6 var(--font-mono);letter-spacing:.06em;color:var(--mist)}
.media-tag{
  position:absolute;top:.5rem;left:.5rem;z-index:2;
  padding:.2rem .5rem;background:var(--orange);color:#150702;
  font:700 10px/1.5 var(--font-mono);letter-spacing:.14em;
}
.media-placeholder{
  display:grid;place-items:center;
  aspect-ratio:16/10;
  background-image:repeating-linear-gradient(135deg,rgba(56,242,196,.12) 0 10px,transparent 10px 22px);
  background-color:var(--ink-3);
  color:var(--mist);
  font:500 12px/1.6 var(--font-mono);letter-spacing:.1em;
}

/* ledger table */
.ledger{width:100%;border-collapse:collapse;font:500 13px/1.65 var(--font-mono);letter-spacing:.02em}
.ledger caption{caption-side:top;text-align:left;padding-bottom:.55rem;color:var(--mist);font-size:12px;letter-spacing:.08em}
.ledger th,.ledger td{padding:.55rem .7rem;border-bottom:1px solid var(--rule);text-align:left}
.ledger thead th{background:var(--ink-3);color:var(--cyan);font-size:11px;letter-spacing:.14em}
.ledger tbody tr{transition:background-color var(--dur) ease}
.ledger tbody tr:hover{background:rgba(56,242,196,.08)}
.ledger td:first-child{color:var(--paper)}

/* disclosure group */
.fold{background:var(--ink-2);border:1px solid var(--rule);border-radius:2px;transition:border-color var(--dur) ease}
.fold+.fold{margin-top:.6rem}
.fold:hover{border-color:rgba(56,242,196,.5)}
.fold summary{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.85rem 1rem;cursor:pointer;
  font:700 15px/1.45 var(--font-body);color:var(--paper);
  list-style:none;
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{content:"+";font:700 16px/1 var(--font-mono);color:var(--cyan)}
.fold[open] summary::after{content:"−";color:var(--orange)}
.fold-body{padding:0 1rem 1rem;color:rgba(243,238,223,.86);font-size:.98rem;line-height:1.8}

/* ============ responsive: header ============ */
@media (max-width:479px){
  .brand-note{display:none}
  .brand-mark{width:38px;height:37px;font-size:15px}
  .brand-name{font-size:17px}
}
@media (min-width:1080px){
  .nav-toggle{display:none}
  .header-inner{gap:.75rem 1.15rem}
  .brand{order:1}
  .site-nav{
    order:2;flex:1 1 auto;
    max-height:none;overflow:visible;visibility:visible;opacity:1;
  }
  .nav-list{flex-wrap:wrap;gap:.15rem}
  .command-bar{order:3;flex:0 1 232px;margin-left:auto}
  .header-cta{order:4}
  .footer-list li{font-size:15.5px}
}
@media (min-width:1360px){
  .command-bar{flex-basis:268px}
}

/* ============ motion / a11y ============ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .download-card:hover,.download-card:focus-visible{transform:none}
  .btn-primary:hover{transform:none}
  .scroll-meter-fill{transition:none}
}