:root{
  --fy-ink:#060B14;
  --fy-deep:#0B1422;
  --fy-panel:#111F30;
  --fy-steel:#294057;
  --fy-cyan:#2AF5D2;
  --fy-mint:#B8FFF1;
  --fy-orange:#FF5B3A;
  --fy-paper:#F2F6F4;
  --fy-gray:#8CA0B5;
  --fy-soft:#CBD8E1;
  --fy-shell:1240px;
  --fy-gutter:clamp(16px,4vw,40px);
  --fy-font-display:"Barlow Condensed","Oswald","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --fy-font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --fy-font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --fy-shadow:0 26px 54px -30px rgba(0,0,0,.95);
  --fy-shadow-brut:6px 6px 0 0 rgba(41,64,87,.5);
  --fy-t:180ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  font-family:var(--fy-font-body);
  font-size:16px;
  line-height:1.55;
  color:var(--fy-soft);
  background-color:var(--fy-ink);
  background-image:
    radial-gradient(70rem 34rem at 88% -8%,rgba(42,245,210,.10),transparent 62%),
    radial-gradient(52rem 32rem at -10% 4%,rgba(255,91,58,.08),transparent 58%);
  background-repeat:no-repeat;
  overflow-wrap:break-word;
}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
address{font-style:normal}
:where(a,button,[tabindex]):focus-visible{outline:2px solid var(--fy-cyan);outline-offset:3px}
.fy-shell{width:100%;max-width:var(--fy-shell);margin-inline:auto;padding-inline:var(--fy-gutter)}

/* ---------- skip link ---------- */
.fy-skip{
  position:fixed;top:0;left:0;z-index:200;
  transform:translateY(-120%);
  padding:12px 20px;
  background:var(--fy-cyan);color:#03130F;
  font-weight:700;text-decoration:none;
  transition:transform var(--fy-t) ease;
}
.fy-skip:focus-visible{transform:translateY(0)}

/* ---------- header ---------- */
.fy-header{
  position:sticky;top:0;z-index:90;
  background:linear-gradient(180deg,rgba(6,11,20,.92),rgba(6,11,20,.55) 62%,rgba(6,11,20,0));
  transition:background-color 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
  border-bottom:1px solid transparent;
}
.fy-header[data-stuck]{
  background-color:rgba(11,20,34,.97);
  border-bottom-color:var(--fy-steel);
  box-shadow:0 16px 34px -22px #000;
}
.fy-progress{height:2px;width:100%;background:rgba(41,64,87,.55);overflow:hidden}
.fy-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--fy-cyan),var(--fy-mint) 55%,var(--fy-orange));
  transition:transform 90ms linear;
}
.fy-header__strip{max-height:34px;overflow:hidden;transition:max-height 220ms ease,opacity 220ms ease;opacity:1}
.fy-header[data-stuck] .fy-header__strip{max-height:0;opacity:0}
.fy-header__strip-in{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding-block:6px;
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--fy-gray);text-transform:uppercase;
  border-bottom:1px dashed rgba(41,64,87,.7);
}
.fy-header__meta{display:flex;align-items:center;gap:8px;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.fy-dot{width:7px;height:7px;flex:0 0 auto;background:var(--fy-cyan);border-radius:50%;box-shadow:0 0 0 3px rgba(42,245,210,.16);animation:fy-pulse 2.6s ease-in-out infinite}
.fy-header__coord{flex:0 0 auto;color:rgba(140,160,181,.75)}
.fy-header__main{position:relative}
.fy-header__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  padding-block:14px;
  transition:padding-block 200ms ease;
}
.fy-header[data-stuck] .fy-header__inner{padding-block:8px}
.fy-brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto;min-height:44px}
.fy-brand__bars{display:inline-flex;align-items:flex-end;gap:3px;height:28px;transform:skewX(-12deg)}
.fy-brand__bars i{display:block;width:5px;height:100%;background:var(--fy-cyan)}
.fy-brand__bars i:nth-child(2){height:72%;background:var(--fy-mint);opacity:.8}
.fy-brand__bars i:nth-child(3){height:46%;background:var(--fy-orange)}
.fy-brand__text{display:flex;flex-direction:column;line-height:1.05}
.fy-brand__name{
  font-family:var(--fy-font-display);
  font-size:clamp(19px,2.2vw,23px);font-weight:800;letter-spacing:.05em;
  color:var(--fy-paper);
}
.fy-brand__sub{
  font-family:var(--fy-font-mono);font-size:10px;letter-spacing:.22em;
  color:var(--fy-gray);margin-top:3px;
}
.fy-nav{margin-left:auto}
.fy-nav__list{display:flex;align-items:center;gap:2px}
.fy-nav__link{
  position:relative;display:flex;align-items:center;gap:7px;
  padding:10px 11px;border-radius:2px;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  color:var(--fy-gray);text-decoration:none;white-space:nowrap;
  transition:color var(--fy-t) ease,background-color var(--fy-t) ease;
}
.fy-nav__idx{
  font-family:var(--fy-font-mono);font-size:10px;letter-spacing:.1em;
  color:rgba(140,160,181,.62);transition:color var(--fy-t) ease;
}
.fy-nav__link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:4px;height:2px;
  background:var(--fy-cyan);transform:scaleX(0);transform-origin:0 50%;
  transition:transform 200ms ease;
}
.fy-nav__link:hover{color:var(--fy-paper)}
.fy-nav__link:hover::after{transform:scaleX(1)}
.fy-nav__link[aria-current="page"]{color:var(--fy-cyan)}
.fy-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.fy-nav__link[aria-current="page"] .fy-nav__idx{color:var(--fy-orange)}
.fy-header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.fy-navtoggle{
  display:none;align-items:center;gap:9px;
  min-height:44px;min-width:44px;padding:0 12px;
  background:transparent;border:2px solid var(--fy-steel);border-radius:2px;
  cursor:pointer;transition:border-color var(--fy-t) ease,color var(--fy-t) ease;
}
.fy-navtoggle:hover{border-color:var(--fy-cyan)}
.fy-navtoggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:18px}
.fy-navtoggle__bars i{display:block;height:2px;width:100%;background:var(--fy-cyan);transition:transform var(--fy-t) ease,opacity var(--fy-t) ease}
.fy-navtoggle__label{font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.18em;color:var(--fy-mint)}
.fy-header[data-open] .fy-navtoggle{border-color:var(--fy-cyan);background:rgba(42,245,210,.08)}
.fy-header[data-open] .fy-navtoggle__bars i:first-child{transform:translateY(3.5px) rotate(45deg)}
.fy-header[data-open] .fy-navtoggle__bars i:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- buttons ---------- */
.fy-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:2px;
  border:2px solid transparent;
  font-family:var(--fy-font-body);font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform var(--fy-t) ease,background-color var(--fy-t) ease,color var(--fy-t) ease,border-color var(--fy-t) ease,box-shadow var(--fy-t) ease;
}
.fy-btn:hover{transform:translateY(-1px)}
.fy-btn--score{background:var(--fy-orange);color:#0A1018;box-shadow:4px 4px 0 0 rgba(42,245,210,.16)}
.fy-btn--score:hover{box-shadow:4px 4px 0 0 rgba(42,245,210,.4)}
.fy-btn--solid{background:var(--fy-cyan);color:#04120F}
.fy-btn--ghost{background:rgba(42,245,210,.04);color:var(--fy-mint);border-color:var(--fy-steel)}
.fy-btn--ghost:hover{border-color:var(--fy-cyan);color:var(--fy-cyan)}

/* ---------- quick bar ---------- */
.fy-quickbar{display:none}

/* ---------- typography helpers ---------- */
.fy-label{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--fy-font-mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--fy-cyan);
}
.fy-label::before{content:"";width:14px;height:2px;background:var(--fy-cyan)}
.fy-title{
  font-family:var(--fy-font-display);
  font-size:clamp(1.9rem,4.6vw,3.4rem);font-weight:800;line-height:1.03;letter-spacing:-.01em;
  color:var(--fy-paper);
}
.fy-lead{font-size:clamp(1rem,1.6vw,1.1rem);line-height:1.6;color:var(--fy-gray);max-width:62ch}
.fy-prose{max-width:70ch;color:var(--fy-soft)}
.fy-prose p{margin-bottom:1em}
.fy-prose p:last-child{margin-bottom:0}
.fy-prose strong{color:var(--fy-paper)}
.fy-prose a{color:var(--fy-cyan);text-underline-offset:3px}
.fy-num{font-family:var(--fy-font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ---------- section ---------- */
.fy-section{padding-block:clamp(40px,6.5vw,84px)}
.fy-section__head{display:flex;flex-direction:column;gap:12px;margin-bottom:clamp(20px,3vw,32px);max-width:70ch}

/* ---------- breadcrumbs ---------- */
.fy-crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:14px;
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--fy-gray);
}
.fy-crumbs a{color:var(--fy-gray);text-decoration:none}
.fy-crumbs a:hover{color:var(--fy-cyan)}
.fy-crumbs li+li::before{content:"/";margin-right:8px;color:var(--fy-steel)}
.fy-crumbs li{display:flex;align-items:center}
.fy-crumbs [aria-current="page"]{color:var(--fy-mint)}

/* ---------- grid ---------- */
.fy-grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.fy-grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.fy-grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.fy-grid--split{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}

/* ---------- panel / strip / tags ---------- */
.fy-panel{
  position:relative;
  padding:clamp(18px,2.6vw,28px);
  background:linear-gradient(158deg,var(--fy-panel),var(--fy-deep) 78%);
  border:2px solid var(--fy-steel);border-radius:2px;
  box-shadow:var(--fy-shadow-brut),var(--fy-shadow);
}
.fy-panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px solid rgba(41,64,87,.8);
}
.fy-strip{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:10px 14px;
  background:rgba(11,20,34,.9);
  border-left:3px solid var(--fy-cyan);
  border-radius:2px;
  transition:background-color var(--fy-t) ease;
}
.fy-strip:hover{background:rgba(17,31,48,.95)}
.fy-strip__num{
  font-family:var(--fy-font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(18px,2.2vw,22px);font-weight:700;color:var(--fy-orange);
}
.fy-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--fy-steel);border-radius:2px;
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--fy-mint);
}
.fy-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;background:var(--fy-cyan);color:#04120F;border-radius:2px;
  font-family:var(--fy-font-mono);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
}
.fy-rule{height:0;border:0;border-top:1px dashed rgba(41,64,87,.9);margin-block:clamp(20px,3vw,34px)}
.fy-legend{display:flex;flex-wrap:wrap;gap:10px 18px}
.fy-legend__key{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--fy-gray);
}
.fy-legend__key::before{content:"";width:10px;height:10px;background:var(--fy-cyan);transform:skewX(-12deg)}
.fy-legend__key[data-tone="score"]::before{background:var(--fy-orange)}
.fy-legend__key[data-tone="line"]::before{background:transparent;border:2px solid var(--fy-steel)}
.fy-legend__key[data-tone="mint"]::before{background:var(--fy-mint)}

/* ---------- media ---------- */
.fy-media{
  position:relative;display:block;overflow:hidden;
  border:2px solid var(--fy-steel);border-radius:2px;
  background:var(--fy-panel);
}
.fy-media__frame{
  position:relative;aspect-ratio:16/9;
  background-color:var(--fy-panel);
  background-image:
    linear-gradient(to right,rgba(42,245,210,.07) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,245,210,.07) 1px,transparent 1px),
    linear-gradient(150deg,#0B1422,#111F30 56%,#0E1B29);
  background-size:48px 48px,48px 48px,100% 100%;
}
.fy-media__frame img{
  display:block;width:100%;height:100%;object-fit:cover;
  filter:saturate(.86) contrast(1.08) brightness(.9);
}
.fy-media--wide .fy-media__frame{aspect-ratio:21/9}
.fy-media--tall .fy-media__frame{aspect-ratio:3/4}
.fy-media__tag{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:5px 12px;
  background:var(--fy-ink);color:var(--fy-mint);
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  border-top:1px solid var(--fy-steel);border-right:1px solid var(--fy-steel);
}

/* ---------- side rail ---------- */
.fy-rail{
  display:grid;gap:2px;
  border-left:1px solid var(--fy-steel);
}
.fy-rail a{
  display:block;margin-left:-1px;padding:7px 10px 7px 14px;
  border-left:2px solid transparent;
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--fy-gray);text-decoration:none;
  transition:color var(--fy-t) ease,border-color var(--fy-t) ease,background-color var(--fy-t) ease;
}
.fy-rail a:hover{color:var(--fy-paper)}
.fy-rail a[data-current]{
  color:var(--fy-cyan);border-left-color:var(--fy-cyan);
  background:linear-gradient(90deg,rgba(42,245,210,.14),transparent);
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 240ms ease,transform 240ms ease}
[data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- footer ---------- */
.fy-footer{
  position:relative;
  margin-top:clamp(40px,7vw,90px);
  padding-block:clamp(34px,5vw,60px) 0;
  background:
    radial-gradient(52rem 22rem at 12% 0%,rgba(42,245,210,.09),transparent 62%),
    linear-gradient(180deg,var(--fy-deep),#070D18 88%);
  border-top:1px solid var(--fy-steel);
}
.fy-footer__edge{
  height:4px;margin-bottom:clamp(24px,4vw,42px);
  background:repeating-linear-gradient(90deg,var(--fy-cyan) 0 26px,rgba(41,64,87,.5) 26px 34px,var(--fy-orange) 34px 52px,rgba(41,64,87,.5) 52px 60px);
  opacity:.85;
}
.fy-footer__top{
  display:flex;align-items:flex-end;justify-content:space-between;gap:clamp(16px,3vw,32px);flex-wrap:wrap;
  padding-bottom:clamp(20px,3vw,30px);
}
.fy-footer__word{
  font-family:var(--fy-font-display);
  font-size:clamp(2.6rem,8vw,5rem);font-weight:800;line-height:.9;letter-spacing:-.01em;
  color:transparent;-webkit-text-stroke:1.4px rgba(42,245,210,.55);
  text-stroke:1.4px rgba(42,245,210,.55);
}
.fy-footer__topmeta{display:flex;flex-direction:column;gap:6px}
.fy-footer__tagline{font-size:14px;color:var(--fy-soft)}
.fy-footer__coord{
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(140,160,181,.8);
}
.fy-footer__cta{flex:0 0 auto}
.fy-footer__grid{
  display:grid;gap:clamp(20px,3vw,36px);
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  padding-block:clamp(20px,3vw,32px);
  border-top:1px solid rgba(41,64,87,.8);
}
.fy-footer__col{min-width:0}
.fy-footer__h{
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;font-weight:700;
  color:var(--fy-cyan);margin-bottom:12px;
}
.fy-footer__list{display:flex;flex-direction:column;gap:8px}
.fy-footer__list a{
  font-size:14px;color:var(--fy-gray);text-decoration:none;
  transition:color var(--fy-t) ease;
}
.fy-footer__list a:hover{color:var(--fy-mint)}
.fy-footer__list--plain li{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline}
.fy-footer__k{
  font-family:var(--fy-font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(140,160,181,.7);flex:0 0 auto;
}
.fy-footer__v{font-size:13.5px;color:var(--fy-soft);word-break:break-all}
.fy-footer__addr{
  margin-top:12px;padding-top:12px;
  border-top:1px dashed rgba(41,64,87,.8);
  font-size:13.5px;line-height:1.6;color:var(--fy-gray);
}
.fy-footer__bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px 24px;flex-wrap:wrap;
  padding-block:16px 22px;
  border-top:1px solid var(--fy-steel);
}
.fy-footer__legal{
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(140,160,181,.85);
}
.fy-footer__legalnav{display:flex;flex-wrap:wrap;gap:6px 18px}
.fy-footer__legalnav a{
  font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--fy-gray);text-decoration:none;
}
.fy-footer__legalnav a:hover{color:var(--fy-cyan)}

@keyframes fy-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(42,245,210,.16)}
  50%{box-shadow:0 0 0 6px rgba(42,245,210,.04)}
}

/* ---------- tablet ---------- */
@media (max-width:980px){
  .fy-nav{
    position:absolute;left:0;right:0;top:100%;
    margin-left:0;
    background:rgba(8,15,25,.985);
    border-top:1px solid var(--fy-steel);
    border-bottom:1px solid var(--fy-steel);
    box-shadow:0 34px 60px -30px #000;
    max-height:calc(100dvh - 80px);overflow:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity 200ms ease,transform 200ms ease,visibility 200ms ease;
  }
  .fy-header[data-open] .fy-nav{opacity:1;visibility:visible;transform:none}
  .fy-nav__list{flex-direction:column;align-items:stretch;gap:0;padding:6px 0}
  .fy-nav__link{
    justify-content:flex-start;gap:12px;
    padding:15px var(--fy-gutter);
    border-bottom:1px solid rgba(41,64,87,.55);
    font-size:17px;border-left:2px solid transparent;
  }
  .fy-nav__link::after{display:none}
  .fy-nav__link[aria-current="page"]{
    border-left-color:var(--fy-cyan);
    background:linear-gradient(90deg,rgba(42,245,210,.14),transparent 70%);
  }
  .fy-nav__idx{font-size:11px}
  .fy-navtoggle{display:inline-flex}
  .fy-header__actions > .fy-btn{display:none}
  .fy-grid--split{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  .fy-grid--split{grid-template-columns:minmax(0,1fr)}
  .fy-footer__top{align-items:flex-start}
}
/* ---------- phone ---------- */
@media (max-width:720px){
  html{scroll-padding-top:76px}
  .fy-header__strip-in{font-size:10px;letter-spacing:.1em}
  .fy-header__coord{display:none}
  .fy-brand__sub{display:none}
  .fy-footer{padding-bottom:76px}
  .fy-footer__grid{grid-template-columns:minmax(0,1fr)}
  .fy-footer__word{font-size:clamp(2.4rem,16vw,3.4rem)}
  .fy-footer__cta{width:100%}
  .fy-quickbar{
    position:fixed;left:12px;right:12px;bottom:12px;z-index:95;
    display:flex;align-items:center;gap:10px;
    padding:12px 16px;
    background:rgba(11,20,34,.97);
    border:1px solid var(--fy-cyan);border-radius:2px;
    box-shadow:0 20px 44px -20px #000,inset 0 0 0 1px rgba(42,245,210,.12);
    text-decoration:none;
  }
  .fy-quickbar__live{
    width:8px;height:8px;flex:0 0 auto;background:var(--fy-orange);border-radius:50%;
    animation:fy-pulse 2.2s ease-in-out infinite;
  }
  .fy-quickbar__text{font-size:15px;font-weight:700;color:var(--fy-mint)}
  .fy-quickbar__num{
    margin-left:auto;
    font-family:var(--fy-font-mono);font-size:11px;letter-spacing:.2em;color:var(--fy-orange);
  }
}
@media (max-width:420px){
  .fy-navtoggle__label{display:none}
  .fy-footer__bottom{flex-direction:column;align-items:flex-start}
}

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