:root{
  --void:#0b121a;
  --panel:#132030;
  --cell:#18293b;
  --ink:#e6f0f6;
  --mute:#8aa0b2;
  --line:rgba(46,196,182,.28);
  --teal:#2ec4b6;
  --teal-dim:#1a8f85;
  --amber:#e0a23a;
  --font:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --display:"Bahnschrift","Segoe UI Semibold","PingFang SC",sans-serif;
  --mono:"Cascadia Mono","Consolas","Sarasa Mono SC",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);font-family:var(--font);line-height:1.65;
  background:
    radial-gradient(circle,rgba(46,196,182,.28) 1px,transparent 1.2px) 0 0/18px 18px,
    radial-gradient(ellipse 60% 40% at 85% 0%,rgba(46,196,182,.12),transparent 55%),
    linear-gradient(180deg,#081018 0%,var(--void) 40%,#101c28 100%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{width:min(1120px,92%);margin:0 auto}

.iot-top{
  position:sticky;top:0;z-index:40;
  background:rgba(11,18,26,.9);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.iot-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.8rem 0}
.brand{display:flex;align-items:center;gap:.7rem}
.brand-node{
  width:2.15rem;height:2.15rem;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--teal);color:var(--teal);font-weight:700;
  box-shadow:0 0 0 4px rgba(46,196,182,.12);
}
.brand b{display:block;font-family:var(--display);font-size:1.02rem;letter-spacing:.08em}
.brand small{display:block;font-family:var(--mono);font-size:.62rem;color:var(--mute);letter-spacing:.12em}
.nav{display:flex;flex-wrap:wrap;gap:.3rem .9rem;color:var(--mute);font-size:.9rem}
.nav a:hover,.nav a.on{color:var(--teal)}
.nav-cta{
  padding:.42rem .9rem;border:1px solid var(--teal);color:var(--teal);
  background:rgba(46,196,182,.1);font-family:var(--mono);font-size:.78rem;letter-spacing:.06em;
  white-space:nowrap;
}
.device-rail{
  display:flex;flex-wrap:wrap;justify-content:center;gap:.45rem;padding:.5rem .8rem;
  border-top:1px solid var(--line);font-family:var(--mono);font-size:.7rem;color:var(--mute);
}
.device-rail i{
  font-style:normal;padding:.2rem .5rem;border:1px solid var(--line);border-radius:999px;
}
.device-rail i::before{content:"";display:inline-block;width:.4rem;height:.4rem;border-radius:50%;background:var(--teal);margin-right:.35rem;vertical-align:middle}

/* Hero */
.hero-iot{padding:2.6rem 0 2rem;border-bottom:1px solid rgba(46,196,182,.16);position:relative}
.hero-iot .hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:1.8rem;align-items:center;
}
.tag{
  display:inline-block;margin:0 0 .75rem;padding:.22rem .55rem;
  border:1px solid var(--line);background:rgba(46,196,182,.08);
  font-family:var(--mono);font-size:.72rem;color:var(--teal);letter-spacing:.1em;
}
.hero-iot h1{
  margin:0 0 .7rem;font-family:var(--display);font-size:clamp(1.85rem,3.8vw,2.7rem);
  line-height:1.18;letter-spacing:.04em;font-weight:650;color:#fff;
}
.lead{margin:0 0 1.2rem;color:var(--mute);max-width:34rem;font-size:1.02rem}
.actions{display:flex;flex-wrap:wrap;gap:.65rem;margin-bottom:1rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:9.3rem;padding:.72rem 1.15rem;
  font-family:var(--display);font-size:.94rem;letter-spacing:.04em;
  border:1px solid transparent;cursor:pointer;
  white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;
}
.btn-fill{background:var(--teal);color:#041512;border-color:#5fe0d2;font-weight:700}
.btn-line{background:transparent;color:var(--ink);border-color:var(--line)}
.btn:hover{filter:brightness(1.08)}
.req{
  display:grid;grid-template-columns:1fr 1fr;gap:.5rem;
  padding:.8rem;background:var(--panel);border:1px solid var(--line);
}
.req p{margin:0;font-size:.84rem;color:var(--mute)}
.req b{color:var(--ink);font-family:var(--mono)}
.mesh{
  display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1rem;font-family:var(--mono);font-size:.7rem;color:var(--mute);
}
.mesh span{padding:.25rem .45rem;border:1px dashed rgba(46,196,182,.35)}
.hero-media{align-self:center}
.frame-iot{
  align-self:center;margin:0;padding:0;overflow:visible;
  border:1px solid var(--line);background:var(--panel);
  box-shadow:0 0 0 1px rgba(46,196,182,.08),0 20px 50px rgba(0,0,0,.35);
}
.hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}

.sec{padding:2.8rem 0;border-bottom:1px solid rgba(46,196,182,.14)}
.sec-h{margin-bottom:1.35rem;max-width:40rem}
.sec-h .k{margin:0 0 .35rem;font-family:var(--mono);font-size:.72rem;color:var(--teal);letter-spacing:.12em}
.sec-h h2{margin:0 0 .45rem;font-family:var(--display);font-size:clamp(1.35rem,2.4vw,1.85rem);letter-spacing:.04em;color:#fff}
.sec-h p{margin:0;color:var(--mute)}

/* Device download cards */
.dev-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.85rem}
.dev{
  display:flex;flex-direction:column;background:var(--cell);border:1px solid var(--line);
  padding:1.1rem 1rem;position:relative;
}
.dev::before{
  content:"";position:absolute;top:.7rem;right:.7rem;width:.45rem;height:.45rem;border-radius:50%;
  background:var(--teal);box-shadow:0 0 8px rgba(46,196,182,.6);
}
.dev .os{margin:0 0 .45rem;font-family:var(--display);font-size:1.05rem;color:var(--teal);letter-spacing:.06em}
.dev .row{margin:0 0 .18rem;font-size:.86rem;color:var(--mute)}
.dev .row b{color:var(--ink);font-family:var(--mono);font-weight:600}
.dev .btn{margin-top:auto;width:100%;margin-top:.95rem}

/* Sensor feature nodes */
.sensors{display:grid;grid-template-columns:repeat(5,1fr);gap:.7rem}
.sensor{
  background:var(--panel);border:1px solid var(--line);padding:1rem .85rem;
}
.sensor .ic{
  width:2rem;height:2rem;margin-bottom:.6rem;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--line);color:var(--teal);
  font-family:var(--mono);font-size:.72rem;font-weight:700;
}
.sensor h3{margin:0 0 .3rem;font-family:var(--display);font-size:.98rem;color:#fff;letter-spacing:.03em}
.sensor p{margin:0;font-size:.86rem;color:var(--mute)}

/* Mesh solution */
.mesh-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:1.2rem;align-items:start}
.mesh-copy{
  background:var(--panel);border:1px solid var(--line);padding:1.35rem 1.25rem;
}
.mesh-copy h2{margin:0 0 .65rem;font-family:var(--display);font-size:1.4rem;color:#fff;letter-spacing:.03em}
.mesh-copy p{margin:0 0 .8rem;color:var(--mute)}
.links{
  display:grid;gap:.4rem;margin-top:1rem;
}
.links div{
  display:grid;grid-template-columns:auto 1fr auto;gap:.55rem;align-items:center;
  padding:.55rem .65rem;background:var(--void);border:1px solid var(--line);
  font-size:.86rem;color:var(--mute);
}
.links code{font-family:var(--mono);font-size:.7rem;color:var(--amber)}
.links b{color:var(--teal);font-family:var(--mono);font-size:.72rem}
.shots{display:grid;grid-template-columns:1fr 1fr;gap:.65rem}
.shots figure{margin:0;border:1px solid var(--line);background:var(--void)}
.shots img{width:100%;height:auto;object-fit:contain;object-position:center}

.trust{padding:2.2rem 0;text-align:center;border-bottom:1px solid rgba(46,196,182,.14)}
.trust strong{
  display:block;font-family:var(--display);font-size:clamp(1.7rem,3.2vw,2.4rem);
  color:var(--teal);letter-spacing:.06em;margin-bottom:.25rem;
}
.trust .sub{color:var(--mute);margin-bottom:1.1rem}
.brands{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem}
.brands span{
  padding:.45rem .9rem;border:1px solid var(--line);background:var(--panel);
  font-family:var(--display);letter-spacing:.1em;font-size:.86rem;
}

.split{display:grid;grid-template-columns:1.1fr .9fr;gap:1rem}
.panel{background:var(--panel);border:1px solid var(--line);padding:1.15rem 1.1rem}
.panel h2{margin:0 0 .9rem;font-family:var(--display);font-size:1.2rem;color:#fff;letter-spacing:.04em}
.news{list-style:none;margin:0;padding:0;display:grid;gap:.7rem}
.news li{padding-bottom:.7rem;border-bottom:1px dashed var(--line)}
.news time{display:block;font-family:var(--mono);font-size:.72rem;color:var(--teal);margin-bottom:.2rem}
.news a{font-weight:600}.news a:hover{color:var(--teal)}
.news p{margin:.25rem 0 0;font-size:.86rem;color:var(--mute)}
.faq details{border-bottom:1px solid var(--line);padding:.55rem 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+ ";color:var(--teal)}
.faq details[open] summary::before{content:"− "}
.faq p{margin:.4rem 0 0;color:var(--mute);font-size:.9rem}
.thumbs{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.5rem;margin-top:1rem}
.thumbs figure{margin:0;border:1px solid var(--line);background:var(--void)}
.thumbs img{width:100%;height:auto;object-fit:contain}

.cta-iot{
  padding:2.8rem 0 3.2rem;
  background:linear-gradient(180deg,rgba(24,41,59,.7),rgba(11,18,26,.95));
  border-bottom:1px solid var(--line);
}
.cta-box{text-align:center;max-width:42rem;margin:0 auto}
.cta-box h2{margin:0 0 .55rem;font-family:var(--display);font-size:clamp(1.35rem,2.6vw,1.9rem);color:#fff;letter-spacing:.04em}
.cta-box > p{margin:0 0 1.1rem;color:var(--mute)}
.gains{list-style:none;margin:1rem 0 0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:.45rem}
.gains li{
  padding:.35rem .7rem;border:1px solid var(--line);font-family:var(--mono);font-size:.78rem;color:var(--mute);
}

.foot{padding:1.3rem 0 1.7rem;color:var(--mute);font-size:.86rem}
.foot-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.7rem;align-items:center}
.foot-links{display:flex;gap:1rem}
.foot-links a:hover{color:var(--teal)}

@media (max-width:960px){
  .hero-iot .hero-grid,.mesh-grid,.split,.dev-grid{grid-template-columns:1fr 1fr}
  .sensors{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .hero-iot .hero-grid,.mesh-grid,.split,.dev-grid,.sensors,.shots,.thumbs,.req{grid-template-columns:1fr}
  .nav{display:none}
  .actions .btn{flex:1 1 100%}
}

.hero-iot .hero-grid{align-items:center}
.hero-iot .hero-media{align-self:center;margin:0;padding:0}
.hero-iot .frame-iot{align-self:center;margin:0;padding:0;overflow:visible}
.hero-iot .hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}