:root{
  --bg:#070B18; --bg2:#0A1020; --surface:#0E1527; --surface2:#131C31; --line:#1C2740;
  --text:#EAF0FA; --muted:#93A0BC; --dim:#65718F;
  --cyan:#3FD8F5; --teal:#38E1C6; --gold:#FFC857; --coral:#FF7A6B; --violet:#9D7BFF; --mint:#7BE495;
  --grad:linear-gradient(135deg,#3FD8F5,#38E1C6);
  --grad-warm:linear-gradient(135deg,#FF7A6B,#FFC857);
  --r:20px; --rs:14px; --maxw:1180px;
  --fs:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,"Noto Sans","Noto Sans Arabic","Noto Sans Hebrew","Noto Sans Devanagari","Noto Sans Thai","Noto Sans JP","Noto Sans KR","Noto Sans SC","Noto Sans TC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font-family:var(--fs);line-height:1.6;
  font-size:17px;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:96px 0;position:relative}
h1,h2,h3{line-height:1.12;letter-spacing:-0.022em;font-weight:700}
h1{font-size:clamp(2.3rem,6vw,4rem)}
h2{font-size:clamp(1.9rem,4.4vw,3rem)}
h3{font-size:1.13rem;letter-spacing:-0.01em;line-height:1.35}
p{color:var(--muted)}
.eyebrow{font-size:.76rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px}
.lead{font-size:clamp(1rem,1.6vw,1.16rem);max-width:62ch}
.center{text-align:center}.center .lead{margin-inline:auto}

/* ---------- nav ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(7,11,24,.78);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
nav{display:flex;align-items:center;gap:14px;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:1.06rem;letter-spacing:-.02em;flex-shrink:0}
.brand img{width:32px;height:32px;border-radius:9px}
.navlinks{display:flex;gap:28px;margin-inline-start:auto;font-size:.93rem;color:var(--muted)}
.navlinks a:hover{color:var(--text)}
.navtools{display:flex;align-items:center;gap:10px;margin-inline-start:auto}
.navlinks+.navtools{margin-inline-start:24px}
select.lang{background:var(--surface2);color:var(--text);border:1px solid var(--line);
  border-radius:999px;padding:8px 12px;font-size:.85rem;font-family:inherit;cursor:pointer;max-width:150px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:999px;font-weight:650;font-size:.97rem;
  background:var(--grad);color:#04202B;border:0;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease;box-shadow:0 6px 26px rgba(63,216,245,.24)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(63,216,245,.34)}
.btn.sm{padding:9px 17px;font-size:.87rem}
.btn.ghost{background:var(--surface2);color:var(--text);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--cyan)}

/* ---------- hero ---------- */
.hero{padding:76px 0 64px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-25% 25% 45% -18%;
  background:radial-gradient(closest-side,rgba(63,216,245,.20),transparent 72%);pointer-events:none;z-index:0}
.hero .wrap{position:relative;z-index:1}
.herogrid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  background:rgba(63,216,245,.09);border:1px solid rgba(63,216,245,.26);
  color:var(--cyan);font-size:.83rem;font-weight:600;margin-bottom:24px}
.badge .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);flex-shrink:0}
.hero h1{margin-bottom:22px}
.hero .lead{margin-bottom:32px;font-size:1.09rem}
.ctarow{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.ctanote{font-size:.86rem;color:var(--dim)}
.stats{display:flex;gap:34px;margin-top:40px;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap}
.stat b{display:block;font-size:1.85rem;font-weight:700;letter-spacing:-.03em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1}
.stat span{font-size:.83rem;color:var(--dim)}

/* ---------- phone ---------- */
.phonewrap{display:flex;justify-content:center;position:relative}
.phonewrap::before{content:"";position:absolute;width:76%;height:64%;top:18%;
  background:radial-gradient(closest-side,rgba(56,225,198,.24),transparent 70%);filter:blur(34px)}
.phone{position:relative;width:295px;border-radius:46px;padding:11px;
  background:linear-gradient(160deg,#252F49,#0D1424);
  box-shadow:0 40px 90px rgba(0,0,0,.62),0 0 0 1px rgba(255,255,255,.07)}
.screen{background:#080D1B;
  border-radius:36px;overflow:hidden;padding:16px 15px 13px}
.pnav{display:flex;justify-content:center;font-size:.72rem;color:var(--dim);
  font-weight:600;padding-bottom:12px}
.ptop{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px;gap:8px}
.ptop h4{font-size:.98rem;font-weight:700;letter-spacing:-.01em}
.ptop p{font-size:.63rem;line-height:1.35;margin-top:2px}
.chip{background:var(--surface2);border:1px solid var(--line);border-radius:10px;
  padding:5px 8px;text-align:center;flex-shrink:0}
.chip b{display:block;font-size:.76rem;color:var(--coral);line-height:1.2}
.chip span{font-size:.53rem;color:var(--dim)}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:15px 13px}
.ringbox{position:relative;width:186px;height:186px;margin:2px auto 12px}
.ringbox svg{transform:rotate(-90deg);overflow:visible}
.ringtxt{position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px}
.ringtxt .lbl{font-size:.53rem;letter-spacing:.13em;color:var(--dim);font-weight:600}
.ringtxt .val{font-size:1.62rem;font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stagepill{display:inline-flex;align-items:center;gap:5px;font-size:.6rem;font-weight:650;
  padding:4px 9px;border-radius:999px}
.pmeta{display:flex;justify-content:space-between;text-align:center;font-size:.58rem;margin:2px 0 12px}
.pmeta b{display:block;font-size:.75rem;font-weight:650;color:var(--text);font-variant-numeric:tabular-nums}
.pmeta span{color:var(--dim)}
.pbtn{background:var(--grad);color:#04202B;text-align:center;padding:11px;
  border-radius:999px;font-weight:700;font-size:.83rem}
.pstage{margin-top:11px}
.pstage .h{display:flex;align-items:center;gap:7px;margin-bottom:6px}
.pstage .h b{font-size:.79rem}
.pstage p{font-size:.62rem;line-height:1.5}
.dotico{width:22px;height:22px;border-radius:7px;display:grid;place-items:center;font-size:.62rem;flex-shrink:0}

/* ---------- problem ---------- */
.probgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px;margin-top:52px}
.prob{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px;position:relative;overflow:hidden;transition:border-color .2s,transform .2s}
.prob:hover{border-color:rgba(63,216,245,.34);transform:translateY(-3px)}
.prob .n{position:absolute;top:18px;inset-inline-end:22px;font-size:2.6rem;font-weight:800;
  color:rgba(255,255,255,.045);line-height:1}
.prob .quote{font-size:1.07rem;font-weight:650;color:var(--coral);margin-bottom:14px;
  padding-inline-end:38px;line-height:1.35}
.prob .lab{font-size:.66rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--dim);margin-bottom:5px}
.prob .truth{font-size:.93rem;color:var(--muted);margin-bottom:16px}
.prob .fixbox{background:rgba(56,225,198,.06);border:1px solid rgba(56,225,198,.2);
  border-radius:var(--rs);padding:13px 15px}
.prob .fixbox .lab{color:var(--teal)}
.prob .fix{font-size:.9rem;color:var(--text)}

/* ---------- demo ---------- */
.demo{background:var(--bg2);border-block:1px solid var(--line)}
.demobox{display:grid;grid-template-columns:300px 1fr;gap:44px;align-items:center;
  margin-top:48px;background:var(--surface);border:1px solid var(--line);
  border-radius:28px;padding:38px}
.demoring{position:relative;width:250px;height:250px;margin:0 auto}
.demoring svg{transform:rotate(-90deg);overflow:visible}
.demoring .ringtxt .val{font-size:2.5rem}
.demoring .ringtxt .lbl{font-size:.62rem}
.slider{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:99px;
  background:var(--surface2);outline:none;margin:22px 0 8px;cursor:pointer;border:1px solid var(--line)}
.slider::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;
  background:#fff;cursor:grab;box-shadow:0 3px 12px rgba(0,0,0,.5),0 0 0 4px rgba(63,216,245,.28)}
.slider::-moz-range-thumb{width:26px;height:26px;border-radius:50%;background:#fff;border:0;
  cursor:grab;box-shadow:0 3px 12px rgba(0,0,0,.5),0 0 0 4px rgba(63,216,245,.28)}
.ticks{display:flex;justify-content:space-between;font-size:.7rem;color:var(--dim);
  font-variant-numeric:tabular-nums}
.scrublabel{font-size:.79rem;color:var(--dim);text-align:center;margin-top:6px}
.stagecard{background:var(--bg);border:1px solid var(--line);border-radius:var(--r);padding:24px;margin-top:8px}
.stagecard .top{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.stagecard h3{font-size:1.32rem}
.rangepill{font-size:.72rem;font-weight:700;padding:4px 11px;border-radius:999px;margin-inline-start:auto}
.stagecard p{font-size:.98rem}
.nextline{display:flex;align-items:center;gap:9px;margin-top:16px;padding-top:15px;
  border-top:1px solid var(--line);font-size:.85rem;color:var(--dim);flex-wrap:wrap}
.nextline b{font-weight:650}

/* ---------- video tour ---------- */
.tourbox{display:grid;grid-template-columns:auto 1fr;gap:56px;align-items:center;
  margin-top:52px;justify-content:center}
.tourphone{position:relative;width:300px;border-radius:44px;padding:10px;
  background:linear-gradient(160deg,#252F49,#0D1424);
  box-shadow:0 40px 90px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.07)}
.tourphone::before{content:"";position:absolute;inset:8% 6% 12%;
  background:radial-gradient(closest-side,rgba(63,216,245,.3),transparent 70%);
  filter:blur(40px);z-index:-1}
.tourscreen{position:relative;border-radius:35px;overflow:hidden;background:#080D1B;aspect-ratio:450/978}
.tourscreen video{width:100%;height:100%;object-fit:cover;display:block}
.playbtn{position:absolute;inset:0;margin:auto;width:72px;height:72px;border-radius:50%;
  border:0;cursor:pointer;background:rgba(10,16,32,.55);backdrop-filter:blur(8px);
  display:grid;place-items:center;transition:transform .2s,background .2s}
.playbtn:hover{transform:scale(1.07);background:rgba(10,16,32,.72)}
.playbtn .tri{width:0;height:0;margin-inline-start:5px;
  border-top:14px solid transparent;border-bottom:14px solid transparent;
  border-inline-start:22px solid #fff}
.playbtn[hidden]{display:none}
.tourside{max-width:340px}
.chapters{list-style:none;counter-reset:ch;display:flex;flex-direction:column;gap:2px}
.chapters li{counter-increment:ch;display:flex;align-items:center;gap:14px;
  padding:13px 16px;border-radius:var(--rs);color:var(--muted);font-size:.95rem;
  cursor:pointer;transition:background .2s,color .2s;border:1px solid transparent}
.chapters li::before{content:counter(ch);width:26px;height:26px;flex-shrink:0;
  border-radius:50%;background:var(--surface2);color:var(--dim);
  display:grid;place-items:center;font-size:.76rem;font-weight:700;transition:.2s}
.chapters li:hover{background:var(--surface)}
.chapters li.on{background:var(--surface);border-color:rgba(63,216,245,.3);color:var(--text)}
.chapters li.on::before{background:var(--grad);color:#04202B}
.chapters li b{font-weight:600}

/* ---------- features ---------- */
.featgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin-top:52px}
.feat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 25px;transition:border-color .2s,transform .2s}
.feat:hover{border-color:rgba(63,216,245,.32);transform:translateY(-3px)}
.feat .ico{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  margin-bottom:17px;font-size:1.25rem}
.feat .tag{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--dim);margin-bottom:7px}
.feat h3{margin-bottom:9px}
.feat p{font-size:.93rem}

/* ---------- science ---------- */
.sci{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:18px;margin-top:52px}
.scicard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;
  border-inline-start:3px solid var(--teal)}
.scicard h3{margin-bottom:10px;color:var(--text)}
.scicard p{font-size:.93rem;margin-bottom:15px}
.src{font-size:.76rem;color:var(--dim);border-top:1px solid var(--line);padding-top:12px;
  font-style:italic;line-height:1.5}
.src::before{content:"◆";color:var(--teal);font-style:normal;margin-inline-end:7px;font-size:.6rem;vertical-align:middle}

/* ---------- safety ---------- */
.safety{background:var(--bg2);border-block:1px solid var(--line)}
.safegrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px;margin-top:48px}
.safecard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px}
.safecard h3{margin-bottom:16px;display:flex;align-items:center;gap:10px;font-size:1.02rem}
.safecard.warn{border-color:rgba(255,200,87,.3)}
.safecard.stop{border-color:rgba(255,92,92,.32)}
.safecard ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.safecard li{display:flex;gap:11px;font-size:.9rem;color:var(--muted);align-items:flex-start}
.safecard li::before{content:"";width:6px;height:6px;border-radius:50%;margin-top:8px;flex-shrink:0;background:var(--dim)}
.safecard.warn li::before{background:var(--gold)}
.safecard.stop li::before{background:var(--coral)}
.safecard.ok li::before{background:var(--teal)}

/* ---------- langs ---------- */
.langgrid{display:flex;flex-wrap:wrap;gap:9px;margin-top:40px;justify-content:center}
.langchip{background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:8px 16px;font-size:.86rem;color:var(--muted);transition:.18s}
.langchip:hover{border-color:var(--cyan);color:var(--text)}
.langchip.on{background:rgba(63,216,245,.12);border-color:var(--cyan);color:var(--cyan);font-weight:600}

/* ---------- final cta ---------- */
.final{text-align:center;position:relative;overflow:hidden}
.final::before{content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse 60% 60% at 50% 45%,rgba(63,216,245,.15),transparent 70%)}
.final .wrap{position:relative}
.final img.appicon{width:96px;height:96px;border-radius:24px;margin:0 auto 28px;
  box-shadow:0 20px 50px rgba(0,0,0,.5)}
.final h2{margin-bottom:16px}
.final .lead{margin-bottom:34px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:52px 0 40px;background:var(--bg2)}
.foottop{display:flex;justify-content:space-between;gap:28px;flex-wrap:wrap;
  align-items:flex-start;margin-bottom:32px}
.foottop .brand img{width:36px;height:36px}
.disclaimer{background:var(--surface);border:1px solid var(--line);border-radius:var(--rs);
  padding:18px 20px;font-size:.79rem;color:var(--dim);line-height:1.65}
.footbot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:26px;font-size:.79rem;color:var(--dim)}

@media(max-width:920px){
  section{padding:72px 0}
  .herogrid{grid-template-columns:1fr;gap:48px}
  .phonewrap{order:-1}
  .demobox{grid-template-columns:1fr;gap:32px;padding:28px 22px}
  .navlinks{display:none}
  .stats{gap:24px}
}
@media(max-width:560px){
  body{font-size:16px}
  .wrap{padding:0 18px}
  .demobox{padding:22px 16px}
  .btn{padding:12px 20px}
  .brand span{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}