*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:110px}
body{margin:0}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
[hidden]{display:none !important}

:root{
  --ink-900:#081713;
  --ink-850:#0B201A;
  --ink-800:#0F2A22;
  --ink-700:#174437;
  --ink-600:#2E7A64;
  --signal:#4FF0D0;
  --signal-soft:#A9FFF0;
  --amber:#FFA23A;
  --paper:#F3F7F5;
  --paper-2:#E7EFEA;
  --mist:#B7C6C0;
  --grey:#6D827A;
  --line:rgba(79,240,208,.16);
  --line-strong:rgba(79,240,208,.34);
  --line-faint:rgba(79,240,208,.10);
  --font-display:"Arial Narrow","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Noto Sans Mono CJK SC",monospace;
  --radius-pill:999px;
  --radius-lg:22px;
  --radius-md:14px;
  --shell:1320px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

body{
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(79,240,208,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(79,240,208,.045) 1px,transparent 1px);
  background-size:64px 64px,64px 64px;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

#main-content{display:block;padding-top:clamp(88px,9vw,112px);outline:none}

:focus-visible{outline:2px solid var(--signal);outline-offset:3px}

/* ---------- layout primitives ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:900px}
.section{position:relative;padding-block:clamp(48px,7vw,104px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px 24px;margin-bottom:clamp(24px,3.5vw,44px);
  padding-bottom:18px;border-bottom:1px solid var(--line-faint);
}
.section--paper{background:var(--paper-2);color:var(--ink-900)}
.section--paper .lede{color:#2C4A40}
.section--paper .section__head{border-bottom-color:rgba(8,23,19,.14)}
.rule{height:1px;border:0;margin-block:clamp(28px,4vw,52px);background:linear-gradient(90deg,var(--line-strong),transparent)}

.kicker{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:14px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--signal);
}
.kicker::before{content:"";width:18px;height:1px;background:var(--amber)}
.section-title{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(30px,4.4vw,58px);line-height:1.06;letter-spacing:-.02em;
  text-wrap:balance;
}
.lede{max-width:62ch;font-size:clamp(16px,1.5vw,18px);line-height:1.8;color:var(--mist)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

.prose{max-width:68ch;font-size:17px;line-height:1.78}
.prose>*+*{margin-top:1.2em}
.prose h2,.prose h3{font-family:var(--font-display);line-height:1.2;letter-spacing:-.015em}
.prose h2{font-size:clamp(24px,3vw,34px);margin-top:2em}
.prose h3{font-size:clamp(19px,2vw,24px);margin-top:1.6em}
.prose a{color:var(--signal);border-bottom:1px solid rgba(79,240,208,.4)}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em}
.prose li+li{margin-top:.5em}
.prose strong{color:var(--paper);font-weight:700}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:clamp(20px,3vw,34px);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--grey);
}
.breadcrumb a{color:var(--mist)}
.breadcrumb a:hover{color:var(--signal)}
.breadcrumb__sep{color:rgba(109,130,122,.7)}
.breadcrumb [aria-current="page"]{color:var(--signal-soft)}

/* ---------- buttons ---------- */
.btn{
  --btn-bg:transparent;--btn-fg:var(--paper);--btn-bd:var(--line-strong);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  border:1px solid var(--btn-bd);background:var(--btn-bg);color:var(--btn-fg);
  font-family:var(--font-body);font-size:14.5px;font-weight:600;letter-spacing:.01em;
  text-align:center;cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--solid{--btn-bg:var(--signal);--btn-fg:#052B23;--btn-bd:var(--signal);font-weight:700}
.btn--solid:hover{--btn-bg:var(--signal-soft);--btn-bd:var(--signal-soft)}
.btn--ghost{--btn-bg:rgba(79,240,208,.06);--btn-fg:var(--signal-soft);--btn-bd:var(--line-strong)}
.btn--ghost:hover{--btn-bg:rgba(79,240,208,.14);--btn-bd:var(--signal)}
.btn--amber{--btn-bg:var(--amber);--btn-fg:#2A1602;--btn-bd:var(--amber);font-weight:700}
.btn--amber:hover{--btn-bg:#FFB861;--btn-bd:#FFB861}
.btn--sm{padding:8px 15px;font-size:13px}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);background:rgba(79,240,208,.07);color:var(--signal-soft);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;white-space:nowrap;
}
.tag--solid{background:var(--signal);border-color:var(--signal);color:#052B23;font-weight:700}
.tag--amber{background:var(--amber);border-color:var(--amber);color:#2A1602;font-weight:700}
.tag--ghost{background:transparent;border-color:rgba(183,198,192,.28);color:var(--mist)}

/* ---------- cards / stats / grids ---------- */
.card{
  position:relative;padding:clamp(18px,2.4vw,26px);
  background:rgba(15,42,34,.72);border:1px solid var(--line);border-radius:var(--radius-md);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.card:hover{border-color:var(--line-strong);background:rgba(23,68,55,.62)}
.card__head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line-faint);
}
.card__title{font-family:var(--font-display);font-size:clamp(19px,2.2vw,24px);font-weight:800;line-height:1.25;letter-spacing:-.01em}
.card__body{font-size:15px;line-height:1.7;color:var(--mist)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-mono);font-weight:700;font-size:clamp(26px,3.4vw,44px);line-height:1;letter-spacing:-.02em;color:var(--signal)}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--grey)}
.stat--amber .stat__value{color:var(--amber)}

.archive-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:clamp(14px,1.8vw,22px)}

/* ---------- media frame ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/9;border:1px solid var(--line);border-radius:var(--radius-md);
  background:
    repeating-linear-gradient(135deg,rgba(79,240,208,.05) 0 2px,transparent 2px 8px),
    var(--ink-800);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame__img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04)}
.media-frame::after{
  content:"";position:absolute;inset:8px;pointer-events:none;
  border:1px solid rgba(79,240,208,.14);border-radius:calc(var(--radius-md) - 6px);
}
.media-frame__tag{
  position:absolute;top:10px;left:10px;z-index:2;padding:4px 10px;border-radius:var(--radius-pill);
  background:rgba(8,23,19,.82);border:1px solid rgba(79,240,208,.45);color:var(--signal-soft);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
}
.media-frame__stamp{
  position:absolute;right:10px;bottom:10px;z-index:2;padding:4px 9px;border-radius:4px;
  background:rgba(8,23,19,.8);border:1px solid rgba(255,162,58,.35);color:var(--amber);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  opacity:.9;transition:opacity .12s linear;
}
.media-frame:hover .media-frame__stamp,.media-frame:focus-visible .media-frame__stamp{opacity:1}

/* ---------- filter ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:clamp(18px,2.5vw,28px)}
.filter-chip{
  padding:8px 15px;border-radius:var(--radius-pill);
  border:1px solid rgba(183,198,192,.24);background:transparent;color:var(--mist);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),background-color .18s var(--ease);
}
.filter-chip:hover{border-color:var(--line-strong);color:var(--signal-soft)}
.filter-chip[aria-pressed="true"]{background:var(--signal);border-color:var(--signal);color:#052B23;font-weight:700}

/* ---------- reveal ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:14px;left:14px;z-index:200;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--signal);color:#052B23;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;font-weight:700;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- scroll meter ---------- */
.scroll-meter{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  background:rgba(79,240,208,.10);pointer-events:none;
}
.scroll-meter__fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--signal),var(--amber));
}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset-inline:0;top:0;z-index:60;
  padding:clamp(10px,1.4vw,18px) clamp(12px,3vw,32px) 0;
  pointer-events:none;
  transition:padding .3s var(--ease);
}
.site-header[data-scrolled]{padding-top:8px}
.header-frame{
  pointer-events:auto;position:relative;
  max-width:var(--shell);margin-inline:auto;
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(10px,2vw,28px);
  padding:9px 12px 9px 16px;
  border-radius:var(--radius-pill);
  background:rgba(11,32,26,.90);
  border:1px solid var(--line);
  box-shadow:0 22px 48px -32px #000,inset 0 1px 0 rgba(255,255,255,.04);
  transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header[data-scrolled] .header-frame{
  background:rgba(8,23,19,.97);
  border-color:var(--line-strong);
  box-shadow:0 28px 60px -34px #000;
}

.brand{display:inline-flex;align-items:center;gap:11px;padding:3px 6px;border-radius:14px}
.brand__mark{
  flex:none;display:grid;grid-template-columns:repeat(3,1fr);align-items:end;gap:3px;
  width:34px;height:34px;padding:7px;
  border:1px solid var(--line-strong);border-radius:10px;
  background:rgba(79,240,208,.06);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.brand:hover .brand__mark{border-color:var(--signal);background:rgba(79,240,208,.12)}
.brand__mark span{display:block;border-radius:1px;background:var(--signal)}
.brand__mark span:nth-child(1){height:46%;opacity:.55}
.brand__mark span:nth-child(2){height:100%}
.brand__mark span:nth-child(3){height:68%;background:var(--amber);opacity:.9}
.brand__text{display:flex;flex-direction:column;gap:3px;line-height:1.1}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:17px;letter-spacing:.02em;color:var(--paper)}
.brand__descriptor{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--grey)}

.site-nav{display:flex;justify-content:center;min-width:0}
.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.site-nav__link{
  position:relative;display:inline-block;padding:9px 13px;
  border-radius:var(--radius-pill);color:var(--mist);
  font-size:14.5px;letter-spacing:.01em;white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:1px;
  background:var(--signal);transform:scaleX(0);transform-origin:left center;
  transition:transform .26s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--signal-soft)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--signal);background:rgba(79,240,208,.10)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);opacity:.65}
.site-nav__cta{display:none}

.header-actions{display:flex;align-items:center;gap:8px;justify-self:end}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:12px 18px;border-radius:var(--radius-pill);
  background:rgba(15,42,34,.96);border:1px solid var(--line-strong);color:var(--signal);
  box-shadow:0 18px 36px -22px #000;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:1.5px;border-radius:1px;background:currentColor;transition:transform .24s var(--ease),opacity .2s var(--ease)}
.nav-toggle__text{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase}
.nav-toggle[aria-expanded="true"]{background:var(--signal);border-color:var(--signal);color:#052B23}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(64px,10vw,140px);
  background:var(--ink-850);
  border-top:1px solid var(--line);
  color:var(--paper);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background-image:repeating-linear-gradient(90deg,var(--signal) 0 8px,transparent 8px 22px);
  opacity:.45;pointer-events:none;
}
.footer-strip{background:rgba(79,240,208,.045);border-bottom:1px solid var(--line-faint)}
.footer-strip__inner{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(12px,3vw,32px);padding-block:16px;
}
.footer-strip__label{
  justify-self:start;padding:5px 12px;border-radius:var(--radius-pill);
  background:var(--amber);color:#2A1602;
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;white-space:nowrap;
}
.footer-strip__text{font-size:14px;line-height:1.6;color:var(--mist)}
.footer-strip__link{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--signal);
  border-bottom:1px solid transparent;white-space:nowrap;padding-bottom:2px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.footer-strip__link:hover{border-color:var(--signal);color:var(--signal-soft)}

.footer-main{
  display:grid;grid-template-columns:minmax(200px,.9fr) minmax(0,2.1fr);
  gap:clamp(28px,5vw,72px);
  padding-block:clamp(36px,5vw,64px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer-brand__note{max-width:26ch;font-size:14px;line-height:1.7;color:var(--mist)}
.footer-index{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.footer-col__title{
  margin-bottom:14px;padding-bottom:10px;
  border-bottom:1px solid var(--line-faint);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--grey);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-list a,.footer-list span{font-size:14.5px;line-height:1.6;color:var(--mist);overflow-wrap:anywhere}
.footer-list a{transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--signal)}
.footer-list--meta span{font-family:var(--font-mono);font-size:13px;letter-spacing:.01em}

.footer-base{border-top:1px solid var(--line-faint);padding-block:20px 26px}
.footer-base__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 24px}
.footer-base__copy{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--grey)}
.footer-base__links{display:flex;flex-wrap:wrap;gap:18px}
.footer-base__links a{
  padding-bottom:2px;border-bottom:1px solid transparent;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--mist);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-base__links a:hover{color:var(--signal);border-bottom-color:var(--signal)}

.to-top{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 16px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);background:rgba(79,240,208,.06);color:var(--signal-soft);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.to-top::before{
  content:"";width:0;height:0;
  border-left:4px solid transparent;border-right:4px solid transparent;border-bottom:6px solid currentColor;
}
.to-top:hover{background:rgba(79,240,208,.16);border-color:var(--signal);color:var(--signal)}

.footer-watermark{
  margin-top:clamp(20px,3vw,40px);
  padding:0 var(--gutter) clamp(8px,2vw,24px);
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(52px,13vw,168px);line-height:.82;letter-spacing:-.03em;
  white-space:nowrap;overflow:hidden;
  color:rgba(79,240,208,.05);
  -webkit-text-stroke:1px rgba(79,240,208,.12);
  user-select:none;pointer-events:none;
}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .header-frame{grid-template-columns:1fr;border-radius:var(--radius-lg);padding:8px 12px 8px 14px}
  .header-actions{display:none}
  .nav-toggle{display:inline-flex;position:fixed;right:16px;bottom:16px;z-index:80}
  .site-nav{
    display:block;position:fixed;left:14px;right:14px;bottom:calc(16px + 46px + 16px);
    max-height:min(70vh,520px);overflow:auto;-webkit-overflow-scrolling:touch;
    padding:14px;border-radius:var(--radius-lg);
    background:rgba(8,23,19,.98);border:1px solid var(--line-strong);
    box-shadow:0 32px 72px -34px #000;
    opacity:0;visibility:hidden;transform:translateY(18px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility 0s linear .24s;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav__link{
    display:flex;align-items:center;justify-content:space-between;
    padding:13px 14px;border-radius:14px;font-size:16px;
  }
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{box-shadow:inset 2px 0 0 var(--signal)}
  .site-nav__cta{display:flex;margin-top:12px;width:100%}
  .site-header[data-open] .site-nav{
    opacity:1;visibility:visible;transform:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility 0s linear 0s;
  }
}
@media (max-width:860px){
  .footer-main{grid-template-columns:1fr;gap:34px}
  .footer-index{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-strip__inner{grid-template-columns:1fr;justify-items:start;gap:10px}
}
@media (max-width:520px){
  .footer-index{grid-template-columns:1fr}
  .footer-base__inner{flex-direction:column;align-items:flex-start}
  .brand__descriptor{display:none}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{opacity:1;transform:none;transition:none}
}