:root{
  --bg:#14171b; --bg2:#1a1f25; --line:#2c343d;
  --cyan:#22d3ee; --cyan-d:#0e7490;
  --white:#e8edf2; --gray:#8b97a5; --blue:#3d6fa3;
  --fh:"Space Grotesk",system-ui,sans-serif;
  --fb:"Inter",system-ui,sans-serif;
  --gap:clamp(.75rem,1.6vw,1.25rem);
  --pad:clamp(1.1rem,3vw,2rem);
  --h:3.75rem;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--h)}
body{background:var(--bg);color:var(--white);font:400 1rem/1.65 var(--fb);overflow-x:hidden;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:48px 48px;background-attachment:fixed;background-blend-mode:soft-light}
a{color:inherit;text-decoration:none}
ul{list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.qk-wrap{width:min(1180px,100% - 2rem);margin-inline:auto}

/* header */
.qk-bar{position:sticky;top:0;z-index:50;background:rgba(20,23,27,.96);border-bottom:1px solid var(--cyan)}
.qk-bar__in{display:flex;align-items:center;justify-content:space-between;height:var(--h);width:min(1180px,100% - 2rem);margin-inline:auto}
.qk-logo{display:flex;align-items:center;gap:.6rem;font:700 1rem var(--fh);letter-spacing:.01em}
.qk-logo__mark{display:grid;place-items:center;width:2rem;height:2rem;border:1px solid var(--cyan);color:var(--cyan);font-size:.8rem;border-radius:2px}
.qk-nav{display:flex;align-items:center;gap:1.25rem}
.qk-nav>ul{display:flex;gap:.25rem}
.qk-nav a{font:500 .75rem var(--fh);letter-spacing:.1em;text-transform:uppercase;color:var(--gray);padding:.5rem .7rem;display:block;transition:color .2s}
.qk-nav a:hover{color:var(--cyan)}
.qk-has-sub{position:relative}
.qk-sub{position:absolute;top:100%;left:0;min-width:11rem;background:var(--bg2);border:1px solid var(--cyan);border-radius:2px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s}
.qk-has-sub:hover .qk-sub,.qk-has-sub:focus-within .qk-sub{opacity:1;visibility:visible;transform:none}
.qk-sub a{padding:.65rem .9rem;border-bottom:1px solid var(--line)}
.qk-btn{display:inline-block;background:var(--cyan);color:#06222a;font:700 .85rem var(--fh);letter-spacing:.04em;padding:.8rem 1.4rem;border-radius:2px;border:1px solid var(--cyan);transition:transform .2s,background .2s,color .2s}
.qk-btn:hover{background:transparent;color:var(--cyan);transform:translateY(-2px)}
.qk-nav .qk-btn--sm{color:#06222a;padding:.5rem .9rem;font-size:.72rem}
.qk-nav .qk-btn--sm:hover{color:var(--cyan)}
.qk-burger{display:none;background:none;border:1px solid var(--line);padding:.55rem;border-radius:2px;cursor:pointer;flex-direction:column;gap:4px}
.qk-burger span{display:block;width:20px;height:2px;background:var(--cyan)}

/* hero */
.qk-hero{padding:clamp(3rem,8vw,6rem) 0 clamp(2.5rem,6vw,4.5rem);border-bottom:1px solid var(--line)}
.qk-tag{font:500 .72rem var(--fh);letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin-bottom:1.25rem}
h1{font:700 clamp(2.2rem,7.2vw,5.5rem)/1 var(--fh);letter-spacing:-.03em;margin-bottom:clamp(1.5rem,4vw,3rem)}
.qk-hero__grid{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center}
.qk-hero__copy p{color:var(--gray);max-width:60ch;margin-bottom:1.5rem}
.qk-specs{display:grid;grid-template-columns:repeat(3,1fr);margin-top:2rem;border:1px solid var(--line);border-radius:2px}
.qk-specs li{padding:.9rem;border-right:1px solid var(--line)}
.qk-specs li:last-child{border:0}
.qk-specs b{display:block;font:700 clamp(1.1rem,2.4vw,1.6rem) var(--fh);color:var(--cyan)}
.qk-specs span{font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--gray);line-height:1.3;display:block}
.qk-unit{position:relative;padding:1rem;border:1px solid var(--line);background:var(--bg2);border-radius:2px;overflow:hidden}
.qk-unit::before{content:"";position:absolute;inset:0;border:1px solid var(--cyan);clip-path:inset(0 100% 100% 0);animation:trace 6s linear infinite;pointer-events:none}
.qk-unit svg{display:block;width:100%;height:auto}
.qk-unit figcaption{font:500 .7rem var(--fh);letter-spacing:.1em;text-transform:uppercase;color:var(--gray);margin-top:.5rem}
.qk-fan{transform-origin:190px 135px;animation:spin 4s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes trace{0%{clip-path:inset(0 100% 99% 0)}25%{clip-path:inset(0 0 99% 0)}50%{clip-path:inset(0 0 0 99%)}75%{clip-path:inset(99% 0 0 0)}100%{clip-path:inset(0 99% 0 0)}}

/* sections */
.qk-sec{padding:clamp(2.5rem,6vw,4.5rem) 0;border-bottom:1px solid var(--line)}
.qk-head{display:flex;align-items:baseline;gap:1rem;margin-bottom:clamp(1.25rem,3vw,2rem);border-bottom:1px solid var(--cyan-d);padding-bottom:.75rem}
.qk-no{font:500 .85rem var(--fh);color:var(--cyan);letter-spacing:.12em}
h2{font:700 clamp(1.5rem,4vw,2.6rem)/1.1 var(--fh);letter-spacing:-.02em}
h3{font:700 1.15rem/1.25 var(--fh);margin-bottom:.6rem}
.qk-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.qk-panel{position:relative;background:rgba(26,31,37,.92);border:1px solid var(--line);border-radius:2px;padding:var(--pad);transition:transform .2s,border-color .2s;min-width:0}
.qk-panel::after{content:"";position:absolute;left:-1px;top:-1px;height:2px;width:0;background:var(--cyan);transition:width .35s}
.qk-panel:hover{transform:translateY(-3px);border-color:var(--blue)}
.qk-panel:hover::after{width:calc(100% + 2px)}
.qk-panel p{color:var(--gray);font-size:.95rem;max-width:70ch}
.qk-s3{grid-column:span 3}.qk-s4{grid-column:span 4}.qk-s5{grid-column:span 5}
.qk-s6{grid-column:span 6}.qk-s7{grid-column:span 7}.qk-s8{grid-column:span 8}.qk-s12{grid-column:span 12}
.qk-off1{grid-column:2 / span 5}
.qk-code{display:inline-block;font:500 .7rem var(--fh);letter-spacing:.12em;color:var(--cyan);border:1px solid var(--cyan-d);padding:.1rem .45rem;margin-bottom:.75rem;border-radius:2px}
.qk-note{border-color:var(--cyan-d);border-left:3px solid var(--cyan)}
.qk-cta{border-color:var(--cyan-d)}
.qk-cta p{margin-bottom:1.25rem}
.qk-list li{padding:.5rem 0 .5rem 1.2rem;border-bottom:1px solid var(--line);color:var(--gray);font-size:.95rem;position:relative}
.qk-list li::before{content:"";position:absolute;left:0;top:1.05rem;width:6px;height:6px;background:var(--cyan)}
.qk-table{width:100%;border-collapse:collapse;font-size:.92rem}
.qk-table th{text-align:left;font:500 .72rem var(--fh);letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);padding:.5rem .6rem .5rem 0;border-bottom:1px solid var(--cyan-d)}
.qk-table td{padding:.65rem .6rem .65rem 0;border-bottom:1px solid var(--line);color:var(--gray);vertical-align:top}
.qk-table td:first-child{color:var(--white);font:500 .95rem var(--fh);white-space:nowrap}

.qk-foot{padding:1.5rem 0;color:var(--gray);font-size:.8rem}
.qk-foot__in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem}

/* responsive */
@media(max-width:900px){
  .qk-hero__grid{grid-template-columns:1fr}
  .qk-s3{grid-column:span 6}
  .qk-s4,.qk-s5,.qk-s7,.qk-s8,.qk-off1{grid-column:span 12}
  .qk-s6{grid-column:span 12}
  .qk-burger{display:flex}
  .qk-nav{position:absolute;top:var(--h);left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg2);border-bottom:1px solid var(--cyan);padding:.5rem 1rem 1rem;display:none}
  .qk-nav.is-open{display:flex}
  .qk-nav>ul{flex-direction:column}
  .qk-sub{position:static;opacity:1;visibility:visible;transform:none;border:0;border-left:1px solid var(--cyan-d);margin-left:.7rem;background:none}
  .qk-sub a{border:0;padding:.4rem .9rem}
  .qk-nav .qk-btn--sm{text-align:center;margin-top:.5rem}
}
@media(max-width:560px){
  .qk-s3{grid-column:span 12}
  .qk-specs{grid-template-columns:1fr}
  .qk-specs li{border-right:0;border-bottom:1px solid var(--line)}
  .qk-table td:first-child{white-space:normal}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}