/* Zuozuo Tech — B2B gaming hardware site */
:root{
  --bg:#0b0e13;
  --bg-2:#111620;
  --bg-3:#161c28;
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.18);
  --txt:#e8ecf3;
  --txt-dim:#9aa5b6;
  --txt-dim2:#6f7a8c;
  --acc:#c1fa6b;
  --acc-2:#8fe04f;
  --acc-ink:#10140a;
  --warn:#ffcf70;
  --radius:14px;
  --maxw:1180px;
  --font:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--txt);font-family:var(--font);
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.12;letter-spacing:-.02em;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--acc);
  font-weight:700;margin:0 0 14px;
}
.lede{font-size:18px;color:var(--txt-dim);max-width:62ch}
.muted{color:var(--txt-dim)}
.small{font-size:13.5px;color:var(--txt-dim2)}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:60;background:rgba(11,14,19,.86);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
}
.hdr{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:28px}
.logo{font-weight:800;letter-spacing:.06em;font-size:17px;white-space:nowrap}
.logo span{color:var(--acc)}
nav{margin-left:auto;display:flex;align-items:center;gap:26px;font-size:14.5px}
nav a{color:var(--txt-dim);transition:color .15s}
nav a:hover{color:var(--txt)}
nav a.active{color:var(--txt)}
.nav-cta{
  border:1px solid var(--acc);color:var(--acc);padding:8px 16px;border-radius:999px;
  font-weight:600;transition:background .15s,color .15s;
}
.nav-cta:hover{background:var(--acc);color:var(--acc-ink)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line-2);
  color:var(--txt);border-radius:8px;padding:7px 11px;font-size:15px;cursor:pointer}

/* ---------- contact strip ---------- */
.cbar{background:#0e1219;border-bottom:1px solid var(--line);font-size:13px}
.cbar .wrap{display:flex;gap:24px;flex-wrap:wrap;align-items:center;
  padding:9px 24px;color:var(--txt-dim)}
.cbar b{color:var(--txt-dim2);font-weight:600;margin-right:7px;letter-spacing:.02em}
.cbar a{color:var(--acc);font-weight:600}
.cbar .ml{margin-left:auto}
.contact-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.contact-list li{display:flex;justify-content:space-between;gap:14px;align-items:baseline;
  padding-bottom:11px;border-bottom:1px solid var(--line);font-size:14.5px}
.contact-list li:last-child{border-bottom:0;padding-bottom:0}
.contact-list span{color:var(--txt-dim2);font-size:12.5px;letter-spacing:.04em;text-transform:uppercase}
.contact-list a,.contact-list strong{color:var(--acc);font-weight:600;word-break:break-all}
.contact-list strong{color:var(--txt)}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;background:var(--acc);color:var(--acc-ink);font-weight:700;
  padding:14px 26px;border-radius:999px;font-size:15px;border:1px solid var(--acc);
  transition:transform .12s,box-shadow .15s;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 26px rgba(193,250,107,.24)}
.btn.ghost{background:transparent;color:var(--txt);border-color:var(--line-2)}
.btn.ghost:hover{border-color:var(--acc);color:var(--acc);box-shadow:none}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}
.textlink{color:var(--acc);font-weight:700;border-bottom:1px solid rgba(193,250,107,.35)}
.textlink:hover{border-color:var(--acc)}

/* ---------- hero ---------- */
.hero{padding:78px 0 66px;border-bottom:1px solid var(--line);
  background:radial-gradient(900px 420px at 78% -10%,rgba(193,250,107,.10),transparent 70%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(38px,5.4vw,62px)}
.hero-art{position:relative;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(160deg,var(--bg-3),var(--bg-2));padding:26px;overflow:hidden}
.hero-art img{border-radius:10px}
.tag{position:absolute;top:16px;left:16px;font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;background:rgba(0,0,0,.55);border:1px solid var(--line-2);
  padding:5px 10px;border-radius:999px;color:var(--acc)}
.hero-facts{display:flex;gap:34px;flex-wrap:wrap;margin-top:30px;
  padding-top:26px;border-top:1px solid var(--line)}
.hero-facts div strong{display:block;font-size:24px;letter-spacing:-.02em}
.hero-facts div span{font-size:13px;color:var(--txt-dim2)}

/* ---------- sections ---------- */
section{padding:80px 0}
.sec{border-bottom:1px solid var(--line)}
.sec-head{max-width:70ch;margin-bottom:46px}
.sec-head h2{font-size:clamp(28px,3.6vw,42px)}
.alt{background:var(--bg-2)}

/* cards */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  background:linear-gradient(180deg,var(--bg-3),var(--bg-2));transition:border-color .15s,transform .15s;
}
.card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{margin:0;color:var(--txt-dim);font-size:14.5px}
.card .num{font-size:12px;letter-spacing:.16em;color:var(--acc);font-weight:700;display:block;margin-bottom:14px}

/* product cards */
.pcard{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  background:var(--bg-2);display:flex;flex-direction:column}
.pcard .art{background:linear-gradient(160deg,var(--bg-3),#0d1119);padding:24px}
.pcard .art img{margin:0 auto;border-radius:10px;max-height:260px;width:auto}
.pcard .body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1}
.pcard h3{font-size:22px;margin:0}
.pcard .meta{display:flex;gap:10px;flex-wrap:wrap;font-size:12px}
.chip{border:1px solid var(--line-2);border-radius:999px;padding:4px 11px;color:var(--txt-dim)}
.chip.acc{border-color:rgba(193,250,107,.4);color:var(--acc)}
.pcard ul{margin:0;padding-left:18px;color:var(--txt-dim);font-size:14.5px}
.pcard .go{margin-top:auto;padding-top:6px}

/* product detail */
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.pd-art{border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  background:linear-gradient(160deg,var(--bg-3),var(--bg-2));position:sticky;top:90px}
.pd-art .note{font-size:12.5px;color:var(--txt-dim2);margin-top:14px;text-align:center}
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;margin-top:8px}
.spec-table th,.spec-table td{text-align:left;padding:13px 0;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{width:38%;color:var(--txt-dim2);font-weight:600}
.pd-block{margin-bottom:38px}
.pd-block h3{font-size:20px}
.kv{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:16px}

/* steps */
.steps{counter-reset:s;display:grid;gap:0;margin:0;padding:0;list-style:none}
.steps li{counter-increment:s;display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:24px 0;border-top:1px solid var(--line)}
.steps li:last-child{border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s,decimal-leading-zero);color:var(--acc);
  font-weight:800;font-size:18px;letter-spacing:.05em}
.steps h3{font-size:18px;margin-bottom:6px}
.steps p{margin:0;color:var(--txt-dim);font-size:14.5px}

/* faq / details */
details{border-top:1px solid var(--line);padding:0}
details:last-of-type{border-bottom:1px solid var(--line)}
details summary{
  cursor:pointer;padding:19px 0;font-weight:600;font-size:16.5px;list-style:none;
  display:flex;justify-content:space-between;gap:20px;align-items:center;
}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--acc);font-size:22px;font-weight:400;line-height:1}
details[open] summary::after{content:"–"}
details .answer{padding:0 0 20px;color:var(--txt-dim);font-size:15px;max-width:78ch}
details .answer p:last-child{margin-bottom:0}

/* notice */
.notice{border:1px solid var(--line-2);border-left:3px solid var(--warn);
  background:rgba(255,207,112,.06);border-radius:8px;padding:16px 20px;font-size:14.5px;color:var(--txt-dim)}
.notice strong{color:var(--txt)}
.notice-acc{border-left-color:var(--acc);background:rgba(193,250,107,.06)}

/* ---------- form ---------- */
.form-card{border:1px solid var(--line);border-radius:var(--radius);padding:34px;
  background:linear-gradient(180deg,var(--bg-3),var(--bg-2))}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
label{font-size:13px;color:var(--txt-dim);font-weight:600;letter-spacing:.02em}
input,select,textarea{
  background:#0a0d12;border:1px solid var(--line-2);color:var(--txt);border-radius:9px;
  padding:12px 14px;font:inherit;font-size:15px;width:100%;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--acc)}
textarea{min-height:130px;resize:vertical}
.req{color:var(--acc)}
.form-foot{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:22px}
.form-msg{font-size:14px;color:var(--txt-dim)}
.form-msg.ok{color:var(--acc)}
.contact-side{display:grid;gap:18px;align-content:start}
.mailbox{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:var(--bg-2)}
.mailbox a.big{font-size:19px;font-weight:700;color:var(--acc);word-break:break-all}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:56px 0 40px;background:var(--bg-2)}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
footer h4{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--txt-dim2);margin-bottom:14px}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:14.5px}
footer ul a{color:var(--txt-dim)}
footer ul a:hover{color:var(--acc)}
.fbottom{max-width:var(--maxw);margin:38px auto 0;padding:22px 24px 0;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--txt-dim2)}

/* breadcrumb */
.crumb{font-size:13px;color:var(--txt-dim2);padding:26px 0 0}
.crumb a{color:var(--txt-dim)}
.crumb a:hover{color:var(--acc)}
.page-head{padding:14px 0 52px;border-bottom:1px solid var(--line);
  background:radial-gradient(700px 320px at 20% -20%,rgba(193,250,107,.08),transparent 70%)}
.page-head h1{font-size:clamp(30px,4.4vw,50px)}

/* cta band */
.band{padding:70px 0;text-align:center;background:
  radial-gradient(800px 340px at 50% 0%,rgba(193,250,107,.12),transparent 70%);border-top:1px solid var(--line)}
.band h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:14px}
.band p{color:var(--txt-dim);max-width:60ch;margin:0 auto 26px}

/* 404 */
.nf{min-height:60vh;display:grid;place-items:center;text-align:center;padding:100px 24px}
.nf code{color:var(--acc);font-size:14px;letter-spacing:.2em}

/* responsive */
@media (max-width:980px){
  .hero-grid,.pd-grid{grid-template-columns:1fr;gap:38px}
  .pd-art{position:static}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-2);
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;
    gap:0;padding:12px 24px 20px;
  }
  nav.open{display:flex}
  nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  nav .nav-cta{margin-top:14px;text-align:center}
  .burger{display:block}
  .hdr{position:relative}
  section{padding:56px 0}
  .hero{padding:52px 0 44px}
  .g2,.g4,.kv{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr}
  .hero-facts{gap:22px}
  .cbar{font-size:12.5px}
  .cbar .wrap{gap:10px 18px;padding:8px 24px}
  .cbar .ml{margin-left:0}
}
@media print{header,nav,.band{display:none}body{background:#fff;color:#000}}

.optional-details{margin:22px 0}.optional-details summary{cursor:pointer;margin-bottom:20px}#copy-fallback{margin-top:24px}#copy-text{width:100%;min-height:240px;resize:vertical;font:inherit;padding:14px}#copy-fallback[hidden]{display:none}