/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
:where(a,button,summary,input):focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
:where([id]){scroll-margin-top:120px}

/* ============ tokens ============ */
:root{
  --ink-900:#06131F;
  --ink-800:#0C2536;
  --ink-700:#143F52;
  --cyan:#35F0D0;
  --orange:#FF6A2A;
  --paper:#F6F1E6;
  --cream:#E9DFCE;
  --brown:#241A14;
  --steel:#8DA3AD;
  --green:#7BE0A3;
  --line-soft:rgba(141,163,173,.22);
  --line-cyan:rgba(53,240,208,.24);
  --maxw:1280px;
  --gutter:clamp(16px,4vw,40px);
  --radius-pill:999px;
  --radius-panel:16px;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --t-fast:240ms;
  --t-mid:360ms;
}

/* ============ base ============ */
body{
  min-height:100vh;
  font-family:var(--font-display);
  font-size:16px;
  line-height:1.75;
  color:var(--paper);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(141,163,173,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(141,163,173,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-font-smoothing:antialiased;
}
p{line-height:1.75}
strong{font-weight:800}
::selection{background:var(--cyan);color:#04161a}

/* ============ layout ============ */
.fs-shell{width:min(calc(100% - var(--gutter) * 2),var(--maxw));margin-inline:auto}
.fs-section{padding:clamp(44px,6.5vw,92px) 0}
.fs-grid{display:grid;gap:clamp(16px,2vw,24px)}
.fs-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.fs-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.fs-grid--aside{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}

/* ============ typography ============ */
.fs-eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:.72rem;font-weight:500;
  letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);
}
.fs-eyebrow::before{content:"";width:26px;height:2px;background:var(--orange);border-radius:2px}
.fs-h1{font-weight:900;letter-spacing:-.02em;line-height:.98;font-size:clamp(2.8rem,7vw,7.5rem)}
.fs-h2{font-weight:900;letter-spacing:-.02em;line-height:1.06;font-size:clamp(2rem,4vw,3.5rem)}
.fs-h3{font-weight:800;letter-spacing:-.01em;line-height:1.32;font-size:clamp(1.12rem,1.8vw,1.45rem)}
.fs-lead{font-size:clamp(1rem,1.3vw,1.125rem);line-height:1.78;color:rgba(246,241,230,.78);max-width:62ch}
.fs-note{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;line-height:1.7;color:var(--steel)}
.fs-annotation{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.32em;
  color:var(--steel);writing-mode:vertical-rl;text-orientation:mixed;
}
.fs-annotation--inline{writing-mode:horizontal-tb;letter-spacing:.2em}

/* ============ panels ============ */
.fs-panel{
  position:relative;
  padding:clamp(20px,3vw,40px);
  border-radius:var(--radius-panel);
  border:1px solid var(--line-soft);
  background:linear-gradient(160deg,rgba(12,37,54,.96),rgba(6,19,31,.97));
  transition:transform var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease);
}
.fs-panel:hover{transform:translateY(-3px);border-color:var(--line-cyan)}
.fs-panel--glass{
  background:rgba(20,63,82,.42);
  border-color:var(--line-cyan);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.fs-panel--paper{
  background:var(--paper);
  color:var(--brown);
  border-color:rgba(36,26,20,.14);
}
.fs-panel--paper .fs-lead{color:rgba(36,26,20,.76)}
.fs-panel--paper .fs-note{color:rgba(36,26,20,.55)}
.fs-panel--paper .fs-h2,.fs-panel--paper .fs-h3{color:var(--brown)}
.fs-panel__num{
  display:inline-block;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.2em;
  color:var(--orange);
}

/* ============ data band ============ */
.fs-data{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;background:var(--line-soft);
  border:1px solid var(--line-soft);border-radius:12px;overflow:hidden;
}
.fs-data__cell{background:var(--ink-800);padding:14px 16px}
.fs-data__label{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--steel);
}
.fs-data__value{
  margin-top:6px;font-family:var(--font-mono);font-size:1.32rem;font-weight:500;
  line-height:1.2;color:var(--paper);
}
.fs-data__value em{font-style:normal;color:var(--cyan)}

/* ============ tags ============ */
.fs-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--steel);border:1px solid rgba(141,163,173,.4);
}
.fs-tag--live{color:var(--orange);border-color:rgba(255,106,42,.55);background:rgba(255,106,42,.1)}
.fs-tag--ok{color:var(--green);border-color:rgba(123,224,163,.45);background:rgba(123,224,163,.08)}

/* ============ buttons ============ */
.fs-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-pill);
  font-weight:700;font-size:.94rem;letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.fs-btn--primary{background:var(--orange);color:#170a03;box-shadow:0 18px 34px -22px rgba(255,106,42,.9)}
.fs-btn--primary:hover{transform:translateY(-2px);background:#ff8149}
.fs-btn--ghost{border-color:rgba(53,240,208,.42);background:rgba(53,240,208,.06);color:var(--paper)}
.fs-btn--ghost:hover{transform:translateY(-2px);border-color:var(--cyan);background:rgba(53,240,208,.14)}

/* ============ breadcrumb ============ */
.fs-breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-top:clamp(18px,3.5vw,34px);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;
  color:var(--steel);
}
.fs-breadcrumb a{color:var(--steel);transition:color var(--t-fast) var(--ease)}
.fs-breadcrumb a:hover{color:var(--cyan)}
.fs-breadcrumb__sep{color:rgba(141,163,173,.55)}
.fs-breadcrumb [aria-current="page"]{color:var(--paper)}

/* ============ media frames ============ */
.fs-media{
  position:relative;isolation:isolate;overflow:hidden;
  aspect-ratio:16 / 10;
  border-radius:var(--radius-panel);
  border:1px solid rgba(141,163,173,.25);
  background:linear-gradient(150deg,var(--ink-700),var(--ink-800) 58%,#0a1c2a);
}
.fs-media img{width:100%;height:100%;object-fit:cover}
.fs-media::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,19,31,0) 42%,rgba(6,19,31,.74));
}
.fs-media--wide{aspect-ratio:16 / 9}
.fs-media--tall{aspect-ratio:4 / 5}
.fs-media__tag{
  position:absolute;left:12px;bottom:12px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;
  color:var(--paper);
  background:rgba(6,19,31,.62);
  border:1px solid rgba(53,240,208,.42);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

/* ============ reveal ============ */
:root.fs-js [data-reveal]{
  opacity:0;
  transform:translate3d(0,18px,0);
  transition:opacity 520ms var(--ease),transform 520ms var(--ease);
  transition-delay:calc(var(--i,0) * 70ms);
  will-change:opacity,transform;
}
:root.fs-js [data-reveal].is-visible{opacity:1;transform:none}

/* ============ skip link ============ */
.fs-skip{
  position:fixed;top:-90px;left:16px;z-index:200;
  padding:12px 20px;border-radius:var(--radius-pill);
  background:var(--cyan);color:#04161a;
  font-weight:800;font-size:.9rem;
  transition:top var(--t-fast) var(--ease);
}
.fs-skip:focus,.fs-skip:focus-visible{top:12px}

/* ============ header ============ */
.fs-header{
  position:sticky;top:0;z-index:80;
  padding:14px var(--gutter) 0;
  transition:padding var(--t-mid) var(--ease);
}
.fs-header.is-compact{padding-top:7px}
.fs-header__inner{
  width:min(100%,var(--maxw));margin-inline:auto;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.fs-brand{
  display:inline-flex;align-items:center;gap:12px;
  padding:9px 18px 9px 14px;
  border-radius:var(--radius-pill);
  background:linear-gradient(155deg,rgba(20,63,82,.94),rgba(6,19,31,.95));
  border:1px solid var(--line-cyan);
  box-shadow:0 20px 44px -30px rgba(0,0,0,.95);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  transition:border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.fs-brand:hover{border-color:var(--cyan);transform:translateY(-1px)}
.fs-brand__mark{
  display:flex;align-items:center;gap:10px;
  font-weight:900;font-size:1.06rem;letter-spacing:-.02em;line-height:1;
  color:var(--paper);white-space:nowrap;
}
.fs-brand__mark::before{
  content:"";width:4px;height:20px;border-radius:2px;
  background:linear-gradient(180deg,var(--cyan),var(--orange));
}
.fs-brand__meta{
  display:flex;align-items:center;gap:7px;
  padding-left:12px;border-left:1px solid rgba(141,163,173,.32);
  font-family:var(--font-mono);font-size:.64rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--steel);white-space:nowrap;
}
.fs-brand__dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--green);box-shadow:0 0 0 4px rgba(123,224,163,.16);
}
.fs-navtoggle{
  display:none;align-items:center;gap:9px;
  margin-left:auto;padding:10px 16px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(141,163,173,.35);
  background:rgba(12,37,54,.9);
  color:var(--paper);font-size:.88rem;font-weight:700;
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.fs-navtoggle:hover{border-color:var(--cyan)}
.fs-navtoggle__bars{display:block;width:18px}
.fs-navtoggle__bars i{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--t-fast) var(--ease);
}
.fs-navtoggle__bars i + i{margin-top:5px}
.fs-navtoggle__label{line-height:1}
.fs-header[data-open] .fs-navtoggle{border-color:var(--cyan);color:var(--cyan)}
.fs-header[data-open] .fs-navtoggle__bars i:first-child{transform:translateY(3.5px) rotate(45deg)}
.fs-header[data-open] .fs-navtoggle__bars i:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.fs-nav{
  margin-left:auto;
  display:flex;align-items:center;gap:8px;
  padding:6px;
  border-radius:var(--radius-pill);
  background:rgba(12,37,54,.82);
  border:1px solid rgba(141,163,173,.24);
  box-shadow:0 24px 50px -34px rgba(0,0,0,.95);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
}
.fs-nav__inner{display:flex;align-items:center}
.fs-nav__list{display:flex;align-items:center;gap:2px}
.fs-nav__link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:var(--radius-pill);
  font-size:.875rem;font-weight:500;line-height:1.2;
  color:rgba(246,241,230,.74);white-space:nowrap;
  transition:color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);
}
.fs-nav__link:hover{color:var(--paper);background:rgba(53,240,208,.1)}
.fs-nav__index{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.08em;color:rgba(141,163,173,.75)}
.fs-nav__link[aria-current="page"]{color:var(--paper);background:rgba(255,106,42,.13)}
.fs-nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:50%;bottom:2px;
  transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--orange);
}
.fs-nav__link[aria-current="page"] .fs-nav__index{color:var(--orange)}
.fs-quicklink{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:var(--radius-pill);
  background:linear-gradient(120deg,var(--orange),#ff8b4d);
  color:#170a03;font-weight:800;font-size:.85rem;letter-spacing:.01em;white-space:nowrap;
  box-shadow:0 14px 30px -18px rgba(255,106,42,.85);
  transition:transform var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.fs-quicklink:hover{transform:translateY(-2px);box-shadow:0 18px 34px -18px rgba(255,106,42,.95)}
.fs-quicklink__arrow{font-family:var(--font-mono);font-size:.85rem;line-height:1}
.fs-progress{
  display:block;width:min(100%,var(--maxw));height:2px;
  margin:10px auto 0;border-radius:2px;
  background:rgba(141,163,173,.18);overflow:hidden;
}
.fs-progress::after{
  content:"";display:block;height:100%;width:100%;
  transform:scaleX(var(--progress,0));transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:transform 120ms linear;
}

/* ============ footer ============ */
.fs-footer{
  margin-top:clamp(48px,8vw,120px);
  color:var(--paper);
  background:
    radial-gradient(120% 90% at 10% -10%,rgba(20,63,82,.6),transparent 62%),
    var(--ink-900);
  border-top:1px solid var(--line-soft);
}
.fs-footer__inner{
  width:min(calc(100% - var(--gutter) * 2),var(--maxw));
  margin-inline:auto;
  padding:clamp(40px,6vw,76px) 0 clamp(26px,4vw,40px);
  display:grid;gap:clamp(26px,4vw,46px);
  grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);
}
.fs-footer__lead{display:flex;flex-direction:column;align-items:flex-start;gap:14px;max-width:44ch}
.fs-footer__eyebrow{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--steel);
}
.fs-footer__dot{width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.fs-footer__brand{
  font-size:clamp(1.55rem,3vw,2.2rem);font-weight:900;letter-spacing:-.02em;
  line-height:1.12;color:var(--paper);
  transition:color var(--t-fast) var(--ease);
}
.fs-footer__brand:hover{color:var(--cyan)}
.fs-footer__tagline{font-size:.94rem;line-height:1.8;color:rgba(246,241,230,.66)}
.fs-footer__dl{
  display:inline-flex;align-items:center;gap:10px;
  padding:11px 20px;border-radius:var(--radius-pill);
  border:1px solid rgba(53,240,208,.42);
  background:rgba(53,240,208,.07);
  color:var(--cyan);font-weight:700;font-size:.9rem;
  transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.fs-footer__dl:hover{background:rgba(53,240,208,.16);border-color:var(--cyan);transform:translateY(-2px)}
.fs-footer__grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.fs-footer__col{display:flex;flex-direction:column;gap:12px}
.fs-footer__label{
  font-family:var(--font-mono);font-size:.66rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--orange);line-height:1.4;
}
.fs-footer__list{display:flex;flex-direction:column;gap:9px}
.fs-footer__link{
  font-size:.92rem;line-height:1.6;color:rgba(246,241,230,.72);
  transition:color var(--t-fast) var(--ease);
}
.fs-footer__link:hover{color:var(--cyan)}
.fs-footer__meta{
  grid-column:1 / -1;
  display:grid;gap:8px;
  padding-top:clamp(16px,3vw,26px);
  border-top:1px solid rgba(141,163,173,.2);
}
.fs-footer__contact,.fs-footer__address{
  font-family:var(--font-mono);font-size:.75rem;line-height:1.75;
  letter-spacing:.02em;color:var(--steel);word-break:break-word;
}
.fs-footer__legal{
  grid-column:1 / -1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 28px;
  padding-top:18px;border-top:1px solid rgba(141,163,173,.2);
}
.fs-footer__legalinks{display:flex;flex-wrap:wrap;gap:8px 20px}
.fs-footer__copy{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.05em;
  color:rgba(141,163,173,.9);line-height:1.7;
}

/* ============ responsive ============ */
@media (max-width:1024px){
  .fs-grid--aside{grid-template-columns:minmax(0,1fr)}
  .fs-header{padding-top:10px}
  .fs-header.is-compact{padding-top:8px}
  .fs-navtoggle{display:inline-flex}
  .fs-brand__meta{display:none}
  .fs-nav{
    order:3;flex-basis:100%;width:100%;
    margin-left:0;margin-top:10px;
    flex-direction:column;align-items:stretch;gap:8px;
    padding:12px;border-radius:22px;
    display:none;
  }
  .fs-header[data-open] .fs-nav{display:flex}
  .fs-nav__inner{width:100%}
  .fs-nav__list{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .fs-nav__link{
    justify-content:flex-start;gap:10px;
    padding:12px 14px;border-radius:14px;font-size:1rem;
  }
  .fs-nav__link[aria-current="page"]{background:rgba(255,106,42,.16)}
  .fs-nav__link[aria-current="page"]::after{
    left:auto;right:14px;bottom:auto;top:50%;
    transform:translateY(-50%);
    width:2px;height:18px;
  }
  .fs-quicklink{justify-content:center;padding:12px 18px;font-size:.95rem}
  .fs-footer__inner{grid-template-columns:1fr}
  .fs-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .fs-grid--2,.fs-grid--3{grid-template-columns:minmax(0,1fr)}
  .fs-h1{letter-spacing:-.01em}
  .fs-brand{padding:8px 14px 8px 12px}
  .fs-brand__mark{font-size:.98rem}
  .fs-footer__legal{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:480px){
  .fs-footer__grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html{scroll-behavior:auto}
  :root.fs-js [data-reveal]{opacity:1;transform:none;transition-delay:0ms}
  .fs-panel:hover,.fs-brand:hover,.fs-btn:hover,.fs-quicklink:hover,.fs-footer__dl:hover{transform:none}
  .fs-progress::after{transition:none}
}