/* ==========================================================================
   Huiqimei 2026 — site stylesheet
   ========================================================================== */
:root{
  --bg:#060b16;
  --bg-soft:#08111f;
  --panel:rgba(255,255,255,.045);
  --line:rgba(140,200,255,.14);
  --ink:#eaf4ff;
  --ink-2:#9cb2ca;
  --ink-3:#6b8199;
  --ice:#4fd2ff;
  --ice-2:#8ef1ff;
  --deep:#1a6bff;
  --max:1240px;
  --r:18px;
  --sans:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --display:'Sora',system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);font-family:var(--sans);
  line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:700;line-height:1.12;letter-spacing:-.025em}
::selection{background:var(--ice);color:#04101f}

/* ---------- ambient background ---------- */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-fx::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(900px 620px at 80% -5%,rgba(26,107,255,.26),transparent 62%),
    radial-gradient(760px 640px at 6% 8%,rgba(79,210,255,.13),transparent 62%),
    radial-gradient(1000px 800px at 50% 104%,rgba(20,80,200,.18),transparent 66%);
}
.bg-fx::after{
  content:'';position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,190,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,190,255,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 95% 60% at 50% 0%,#000 12%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 95% 60% at 50% 0%,#000 12%,transparent 72%);
}
header,main,footer{position:relative;z-index:1}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:200;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  background:rgba(6,11,22,.78);border-bottom:1px solid rgba(140,200,255,.10);
}
.nav{max-width:var(--max);margin:0 auto;padding:0 24px;height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:800;font-size:15px;letter-spacing:.16em;white-space:nowrap}
.brand img{height:30px;width:auto}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:none;
  background:linear-gradient(145deg,var(--ice),var(--deep));
  display:grid;place-items:center;color:#03101f;font-size:14px;font-weight:800;
  box-shadow:0 0 18px rgba(79,210,255,.4);
}
.menu{display:flex;align-items:center;gap:26px;font-size:13.5px;color:var(--ink-2)}
.menu a{transition:color .2s;white-space:nowrap}
.menu a:hover,.menu a.on{color:var(--ice)}
.nav-cta{
  padding:9px 19px;border-radius:100px;font-size:12.5px;font-weight:600;
  background:linear-gradient(135deg,var(--ice-2),#2a8cff);color:#02101f;
  box-shadow:0 6px 22px rgba(79,210,255,.28);transition:transform .2s,box-shadow .2s;white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(79,210,255,.42)}
.burger{display:none;background:none;border:0;color:var(--ink);padding:6px;cursor:pointer}
.burger svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round}
@media(max-width:940px){
  .menu{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(6,11,22,.98);border-bottom:1px solid var(--line);padding:8px 24px 18px}
  .menu.open{display:flex}
  .menu a{padding:12px 0;width:100%;font-size:15px;border-bottom:1px solid rgba(140,200,255,.07)}
  .menu a:last-child{border-bottom:0}
  .burger{display:block}
  .nav-cta{display:none}
}

/* ---------- shared type ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;font-weight:600;letter-spacing:.19em;text-transform:uppercase;
  color:var(--ice-2);padding:6px 14px;border-radius:100px;
  border:1px solid rgba(79,210,255,.28);background:rgba(79,210,255,.07);
}
.eyebrow i{width:5px;height:5px;border-radius:50%;background:var(--ice);box-shadow:0 0 8px var(--ice);display:block}
.grad{background:linear-gradient(100deg,var(--ice-2),var(--ice) 46%,#3f8dff);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec{padding:88px 0;position:relative}
.sec-head{max-width:730px;margin-bottom:48px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{font-size:clamp(27px,3.6vw,44px);margin:18px 0 16px}
.sec-head p{color:var(--ink-2);font-size:16px;font-weight:300;max-width:640px}
.sec-head.center p{margin:0 auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:100px;font-family:var(--display);
  font-size:13.5px;font-weight:600;letter-spacing:.02em;
  transition:transform .22s cubic-bezier(.22,1,.36,1),box-shadow .22s,background .22s;
}
.btn-primary{background:linear-gradient(135deg,var(--ice-2),var(--ice) 46%,#2a7dff);color:#03101f;box-shadow:0 10px 30px rgba(79,210,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 15px 40px rgba(79,210,255,.46)}
.btn-ghost{border:1px solid rgba(140,200,255,.28);color:var(--ink)}
.btn-ghost:hover{background:rgba(140,200,255,.09);transform:translateY(-2px)}
.btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* reveal */
.rv{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ==========================================================================
   PRODUCT PAGE
   ========================================================================== */
.crumb{max-width:var(--max);margin:0 auto;padding:22px 24px 0;font-size:12px;color:var(--ink-3);letter-spacing:.03em}
.crumb a:hover{color:var(--ice)}
.crumb span{margin:0 7px;opacity:.5}

.phero{padding:28px 0 60px;border-bottom:1px solid rgba(140,200,255,.08)}
.phero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.phero h1{font-size:clamp(28px,3.5vw,44px);margin:20px 0 16px}
.phero .tag{color:var(--ice-2);font-size:13px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;margin-bottom:12px;display:block}
.phero p.lead{color:var(--ink-2);font-size:16px;font-weight:300;line-height:1.78;max-width:520px}
.pstats{display:flex;flex-wrap:wrap;gap:9px;margin:30px 0 34px}
.pstat{display:flex;align-items:baseline;gap:7px;padding:8px 15px;border-radius:100px;border:1px solid rgba(140,200,255,.16);background:rgba(255,255,255,.032)}
.pstat b{font-family:var(--display);font-size:14.5px;font-weight:700;color:var(--ice-2)}
.pstat span{font-size:11.5px;color:var(--ink-3)}
.pactions{display:flex;gap:12px;flex-wrap:wrap}

.pshot{position:relative}
.pshot-glow{position:absolute;inset:-12%;background:radial-gradient(circle at 50% 45%,rgba(79,210,255,.32),transparent 62%);filter:blur(40px);z-index:-1}
.pshot-frame{border-radius:26px;overflow:hidden;border:1px solid rgba(160,215,255,.22);
  box-shadow:0 36px 80px -32px rgba(0,0,0,.9),0 0 0 1px rgba(255,255,255,.05) inset}
.pshot-frame img{width:100%;aspect-ratio:1/1;object-fit:cover}
.pbadge{
  position:absolute;top:16px;right:16px;padding:7px 14px;border-radius:100px;
  background:linear-gradient(135deg,var(--ice-2),#2a7dff);color:#02101f;
  font-family:var(--display);font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  box-shadow:0 8px 22px rgba(79,210,255,.4);
}

/* stats band */
.pband{border-top:1px solid rgba(140,200,255,.1);border-bottom:1px solid rgba(140,200,255,.1);background:rgba(255,255,255,.016)}
.pband-in{max-width:var(--max);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr)}
.pband .cell{padding:28px 16px;text-align:center;border-right:1px solid rgba(140,200,255,.07)}
.pband .cell:last-child{border-right:0}
.pband .cell b{display:block;font-family:var(--display);font-size:clamp(22px,2.5vw,30px);font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(180deg,#fff,var(--ice) 150%);-webkit-background-clip:text;background-clip:text;color:transparent}
.pband .cell span{display:block;font-size:10.5px;color:var(--ink-3);letter-spacing:.14em;text-transform:uppercase;margin-top:6px}
@media(max-width:700px){
  .pband-in{grid-template-columns:repeat(2,1fr)}
  .pband .cell{border-right:0;border-bottom:1px solid rgba(140,200,255,.07)}
  .pband .cell:nth-child(odd){border-right:1px solid rgba(140,200,255,.07)}
}

/* feature grid */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.fcard{
  padding:26px 24px;border-radius:var(--r);border:1px solid var(--line);
  background:linear-gradient(168deg,rgba(255,255,255,.052),rgba(255,255,255,.012));
  transition:border-color .3s,transform .3s,background .3s;
}
.fcard:hover{border-color:rgba(79,210,255,.38);transform:translateY(-3px)}
.fnum{font-family:var(--display);font-size:11px;font-weight:700;color:var(--ice);letter-spacing:.16em;margin-bottom:14px;opacity:.8}
.fcard h4{font-size:15.5px;margin-bottom:8px}
.fcard p{font-size:13.5px;color:var(--ink-3);line-height:1.66;font-weight:300}
@media(max-width:900px){.fgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.fgrid{grid-template-columns:1fr}}

/* colours */
.colors{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.swatches{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 26px}
.sw{
  display:flex;align-items:center;gap:10px;padding:9px 16px 9px 10px;border-radius:100px;
  border:1px solid rgba(140,200,255,.16);background:rgba(255,255,255,.03);font-size:13px;color:var(--ink-2);
}
.sw i{width:22px;height:22px;border-radius:50%;border:1px solid rgba(255,255,255,.24);display:block;flex:none;
  box-shadow:0 3px 10px -3px rgba(0,0,0,.8)}
.cgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.cgrid figure{border-radius:16px;overflow:hidden;border:1px solid var(--line);background:#0a1422}
.cgrid img{width:100%;aspect-ratio:1/1;object-fit:cover}
.cgrid figcaption{padding:10px 12px;font-size:12px;color:var(--ink-2);text-align:center;border-top:1px solid rgba(140,200,255,.08)}
@media(max-width:900px){.colors{grid-template-columns:1fr;gap:32px}}
@media(max-width:620px){.cgrid{grid-template-columns:repeat(2,1fr)}}

/* spec table */
.spec-wrap{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:start}
table.spec{width:100%;border-collapse:collapse;font-size:14px}
table.spec tr{border-bottom:1px solid rgba(140,200,255,.09)}
table.spec tr:last-child{border-bottom:0}
table.spec td{padding:14px 0;vertical-align:top}
table.spec td:first-child{color:var(--ink-3);font-size:13px;width:44%}
table.spec td:last-child{color:#eaf4ff;font-weight:500;text-align:right}
.side-card{padding:26px 24px;border-radius:var(--r);border:1px solid rgba(79,210,255,.22);
  background:linear-gradient(165deg,rgba(79,210,255,.1),rgba(79,210,255,.02))}
.side-card h3{font-size:16px;margin-bottom:10px}
.side-card p{font-size:13.5px;color:var(--ink-2);font-weight:300;line-height:1.7;margin-bottom:18px}
.side-card .btn{width:100%;padding:13px 20px;font-size:13px}
@media(max-width:880px){.spec-wrap{grid-template-columns:1fr;gap:32px}}

/* video slot */
.vslot{
  position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line);
  background:linear-gradient(160deg,#0b1a2c,#060d18);aspect-ratio:16/9;
  display:grid;place-items:center;text-align:center;padding:30px;
}
.vslot .play{width:64px;height:64px;border-radius:50%;border:1px solid rgba(79,210,255,.4);
  background:rgba(79,210,255,.12);display:grid;place-items:center;margin:0 auto 16px}
.vslot .play svg{width:22px;height:22px;fill:var(--ice-2);margin-left:3px}
.vslot h4{font-size:16px;margin-bottom:6px}
.vslot p{font-size:12.5px;color:var(--ink-3);max-width:340px;margin:0 auto}

/* CTA */
.cta-band{
  position:relative;border-radius:26px;overflow:hidden;text-align:center;padding:66px 30px;
  background:linear-gradient(150deg,rgba(79,210,255,.15),rgba(26,107,255,.09) 46%,rgba(6,11,22,.4));
  border:1px solid rgba(140,200,255,.2);
}
.cta-band h2{font-size:clamp(26px,3.6vw,40px);margin-bottom:14px}
.cta-band p{color:var(--ink-2);max-width:520px;margin:0 auto 28px;font-weight:300;font-size:15px}

/* ==========================================================================
   HOME
   ========================================================================== */
.hero{padding:64px 0 72px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(34px,5.2vw,64px);letter-spacing:-.035em;margin:22px 0 20px}
.hero h1 em{font-style:normal;display:block;font-size:.86em}
.hero p.sub{color:var(--ink-2);font-size:16.5px;font-weight:300;max-width:500px;line-height:1.75}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:34px}
.hero-nums{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.hero-nums div b{display:block;font-family:var(--display);font-size:26px;font-weight:800;color:#fff;letter-spacing:-.02em}
.hero-nums div span{font-size:11px;color:var(--ink-3);letter-spacing:.13em;text-transform:uppercase}
.hero-visual{position:relative}
.hero-collage{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero-collage figure{border-radius:18px;overflow:hidden;border:1px solid rgba(160,215,255,.2);background:#0a1422}
.hero-collage img{width:100%;aspect-ratio:1/1;object-fit:cover}
.hero-collage figure:first-child{grid-row:span 2}
.hero-collage figure:first-child img{aspect-ratio:1/2.05}
@media(max-width:940px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-visual{order:-1}
  .hero-collage{grid-template-columns:1fr 1fr 1fr}
  .hero-collage figure:first-child{grid-row:auto}
  .hero-collage figure:first-child img{aspect-ratio:1/1}
  .hero h1{font-size:clamp(30px,7vw,44px)}
}

/* category chips */
.catbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.catbar button{
  padding:9px 18px;border-radius:100px;font-size:13px;font-family:var(--sans);
  border:1px solid rgba(140,200,255,.18);background:transparent;color:var(--ink-2);
  cursor:pointer;transition:all .22s;
}
.catbar button:hover{border-color:rgba(79,210,255,.4);color:var(--ice-2)}
.catbar button.on{background:linear-gradient(135deg,var(--ice-2),#2a8dff);color:#02101f;border-color:transparent;font-weight:600}

/* product grid */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pcard{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#0a1422;
  transition:transform .35s cubic-bezier(.22,1,.36,1),border-color .3s,box-shadow .35s;display:block;
}
.pcard:hover{transform:translateY(-4px);border-color:rgba(79,210,255,.42);box-shadow:0 22px 44px -22px rgba(0,0,0,.9)}
.pcard .ph{position:relative;overflow:hidden;background:#eaf3fc}
.pcard .ph img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .6s cubic-bezier(.22,1,.36,1)}
.pcard:hover .ph img{transform:scale(1.05)}
.pcard .ptag{
  position:absolute;top:10px;left:10px;padding:4px 10px;border-radius:100px;
  font-size:10px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  background:linear-gradient(135deg,var(--ice-2),#2a7dff);color:#02101f;
}
.pcard .pb{padding:15px 16px 17px}
.pcard .pmodel{font-size:10.5px;color:var(--ice);letter-spacing:.14em;text-transform:uppercase;margin-bottom:5px;font-weight:600}
.pcard h3{font-size:14.5px;line-height:1.35;margin-bottom:7px;color:#fff}
.pcard .pmeta{font-size:11.5px;color:var(--ink-3);display:flex;gap:10px;flex-wrap:wrap}
.pcard .pmeta span{white-space:nowrap}
@media(max-width:1080px){.pgrid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:800px){.pgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:460px){.pgrid{grid-template-columns:1fr}}

/* capability strip */
.caps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cap{padding:24px 22px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.026)}
.cap .ic{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;margin-bottom:14px;
  background:rgba(79,210,255,.1);border:1px solid rgba(79,210,255,.22);color:var(--ice-2)}
.cap .ic svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.cap h4{font-size:14px;margin-bottom:6px}
.cap p{font-size:12.5px;color:var(--ink-3);line-height:1.6;font-weight:300}
@media(max-width:900px){.caps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.caps{grid-template-columns:1fr}}

/* ---------- footer ---------- */
footer{border-top:1px solid rgba(140,200,255,.1);margin-top:88px;padding:52px 0 34px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:38px}
.foot-grid h5{font-family:var(--display);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ice-2);margin-bottom:14px}
.foot-grid p,.foot-grid a{font-size:13px;color:var(--ink-3);line-height:1.9;display:block}
.foot-grid a:hover{color:var(--ice)}
.foot-bottom{border-top:1px solid rgba(140,200,255,.08);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink-3)}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr;gap:26px}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}

/* 产品视频（16:9 自适应） */
.vwrap{position:relative;width:100%;aspect-ratio:16/9;border-radius:16px;overflow:hidden;
  border:1px solid rgba(140,200,255,.16);background:#06080d;
  box-shadow:0 30px 70px -40px rgba(0,0,0,.9)}
.vwrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}