/* QuantBit · dq-binance.com — dark + gold, robinhood-skeleton landing */
*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#0b0e11;--bg2:#12161c;--bg3:#171d25;
  --ink:#eaecef;--mut:#9aa6b2;--soft:#7b8694;
  --gold:#f0b90b;--gold2:#f8d12f;--goldink:#1c1500;
  --line:#1e2630;--cardline:#232c37;
  --r:16px;--rs:10px;--wrap:1180px;
  --ff:"Segoe UI",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--ff);background:var(--bg);color:var(--ink);line-height:1.6;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p{margin:0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}
.row{display:flex;align-items:center}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;border:none;cursor:pointer;font-family:inherit;font-size:15px;font-weight:700;padding:13px 26px;border-radius:999px;transition:transform .12s ease,background .15s ease,border-color .15s;line-height:1}
.btn:active{transform:translateY(1px)}
.btn-gold{background:var(--gold);color:var(--goldink)}
.btn-gold:hover{background:var(--gold2)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid #2c3742}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn-dark{background:#0b0e11;color:#fff;border:1.5px solid #0b0e11}
.btn-dark:hover{background:#1b232c}
.btn-lg{padding:16px 34px;font-size:16px}
.arr::after{content:"→";font-weight:700}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,14,17,.86);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.nav .row{height:68px;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.2px}
.nav-links{display:flex;gap:26px}
.nav-links a{color:var(--mut);font-size:14.5px;font-weight:600}
.nav-links a:hover{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-right .lk{color:var(--mut);font-size:14.5px;font-weight:600;background:none;border:none;cursor:pointer;font-family:inherit;padding:6px 4px}
.nav-right .lk:hover{color:var(--ink)}
.menu-btn{display:none}

/* hero */
.hero{position:relative;padding:84px 0 70px;background:radial-gradient(120% 90% at 85% 0%,rgba(240,185,11,.10),transparent 55%),var(--bg)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--gold);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--gold)}
.hero h1{font-size:clamp(38px,5.6vw,68px);line-height:1.04;font-weight:800;letter-spacing:-.5px}
.hero h1 .g{color:var(--gold)}
.hero .lead{margin-top:22px;font-size:18px;color:var(--mut);max-width:34em}
.cta-row{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{margin-top:34px;display:flex;flex-wrap:wrap;gap:26px}
.hero-stats div{min-width:0}
.hero-stats b{display:block;font-size:22px;font-weight:800;color:var(--ink)}
.hero-stats span{font-size:13px;color:var(--soft)}
.hero-art{position:relative}
.glass{background:linear-gradient(180deg,#11161d,#0c1014);border:1px solid var(--cardline);border-radius:20px;padding:18px;box-shadow:0 30px 80px -30px rgba(0,0,0,.8)}

/* trust strip */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg2)}
.strip .wrap{display:flex;flex-wrap:wrap;gap:14px 38px;padding-top:20px;padding-bottom:20px;justify-content:space-between;align-items:center}
.strip .it{display:flex;align-items:baseline;gap:9px}
.strip .it b{font-size:20px;font-weight:800;color:var(--gold)}
.strip .it span{font-size:13.5px;color:var(--mut)}

/* feature rows */
.feat{padding:78px 0}
.feat .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.feat.alt .fx-text{order:2}
.fx-text .kick{color:var(--gold);font-weight:700;font-size:13px;letter-spacing:.1em;text-transform:uppercase}
.fx-text h2{margin-top:14px;font-size:clamp(27px,3.4vw,40px);line-height:1.12;font-weight:800;letter-spacing:-.3px}
.fx-text p{margin-top:18px;color:var(--mut);font-size:16.5px}
.fx-text .acts{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}

/* device cards inside feature */
.dgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.dcard{background:var(--bg2);border:1px solid var(--cardline);border-radius:var(--r);padding:20px;cursor:pointer;transition:border-color .15s,transform .12s,background .15s;text-align:left;color:inherit;font-family:inherit}
.dcard:hover{border-color:var(--gold);transform:translateY(-2px);background:var(--bg3)}
.dcard .ic{width:42px;height:42px;color:var(--gold);margin-bottom:14px}
.dcard h4{font-size:16px;font-weight:700}
.dcard span{display:block;margin-top:5px;color:var(--soft);font-size:13px}

/* protection guarantee (centered dark) */
.guard{padding:84px 0;background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.guard .head{text-align:center;max-width:720px;margin:0 auto 50px}
.guard .head h2{font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:-.3px}
.guard .head p{margin-top:16px;color:var(--mut);font-size:16.5px}
.gcards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.gcard{background:linear-gradient(180deg,#10151b,#0c1015);border:1px solid var(--cardline);border-radius:var(--r);padding:30px 26px}
.gcard .gi{width:50px;height:50px;border-radius:12px;background:rgba(240,185,11,.12);color:var(--gold);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.gcard .gi svg{width:26px;height:26px}
.gcard h4{font-size:18px;font-weight:700}
.gcard p{margin-top:10px;color:var(--mut);font-size:15px}

/* gold band */
.band{background:linear-gradient(120deg,var(--gold),var(--gold2));color:var(--goldink)}
.band .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding-top:64px;padding-bottom:64px}
.band h2{font-size:clamp(28px,3.8vw,44px);font-weight:800;letter-spacing:-.4px;line-height:1.1}
.band p{margin-top:16px;font-size:17px;color:#3a2d00;max-width:32em}
.band .acts{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}
.band .phone{justify-self:center}

/* steps */
.steps-sec{padding:80px 0}
.steps-sec h2{text-align:center;font-size:clamp(27px,3.4vw,40px);font-weight:800;letter-spacing:-.3px}
.steps-sec .sub{text-align:center;color:var(--mut);margin-top:14px;font-size:16.5px;max-width:44em;margin-left:auto;margin-right:auto}
.steps{margin-top:46px;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:var(--bg2);border:1px solid var(--cardline);border-radius:var(--r);padding:30px 26px;position:relative}
.step .num{width:40px;height:40px;border-radius:50%;background:var(--gold);color:var(--goldink);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:18px}
.step h4{font-size:18px;font-weight:700}
.step p{margin-top:10px;color:var(--mut);font-size:15px}

/* faq */
.faq-sec{padding:30px 0 86px}
.faq-sec h2{text-align:center;font-size:clamp(26px,3.3vw,38px);font-weight:800;margin-bottom:40px;letter-spacing:-.3px}
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.qa{background:var(--bg2);border:1px solid var(--cardline);border-radius:12px;overflow:hidden}
.qa summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:14px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--gold);font-size:22px;font-weight:700;flex:none}
.qa[open] summary::after{content:"–"}
.qa .a{padding:0 22px 20px;color:var(--mut);font-size:15.5px}

/* final cta */
.endcta{padding:96px 0;text-align:center;background:radial-gradient(120% 120% at 50% 0%,rgba(240,185,11,.12),transparent 60%),var(--bg)}
.endcta h2{font-size:clamp(32px,5vw,58px);font-weight:800;letter-spacing:-.5px;line-height:1.06;max-width:16em;margin:0 auto}
.endcta p{margin:20px auto 0;color:var(--mut);font-size:17px;max-width:40em}
.endcta .acts{margin-top:34px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* footer */
footer{background:var(--bg2);border-top:1px solid var(--line);padding:62px 0 40px}
.fcols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:30px}
.fcol h5{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--soft);margin-bottom:14px}
.fcol a{display:block;color:var(--mut);font-size:14px;padding:5px 0}
.fcol a:hover{color:var(--gold)}
.fbrand{max-width:260px}
.fbrand .brand{margin-bottom:14px}
.fbrand p{color:var(--soft);font-size:13.5px}
.fline{height:1px;background:var(--line);margin:38px 0 22px}
.fbar{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;color:var(--soft);font-size:13px}
.risk{margin-top:20px;color:#5f6b78;font-size:12.5px;line-height:1.7}

/* responsive */
@media(max-width:920px){
  .nav-links{display:none}
  .hero .wrap,.feat .wrap,.band .wrap{grid-template-columns:1fr;gap:34px}
  .feat.alt .fx-text{order:0}
  .hero-art,.band .phone{order:-1}
  .gcards,.steps{grid-template-columns:1fr}
  .fcols{grid-template-columns:1fr 1fr}
  .fbrand{grid-column:1/-1}
}
@media(max-width:430px){
  .wrap{padding:0 16px}
  .hero{padding:60px 0 52px}
  .hero h1{font-size:34px}
  .cta-row .btn,.fx-text .acts .btn,.band .acts .btn,.endcta .acts .btn{width:100%;justify-content:center}
  .hero-stats{gap:18px 24px}
  .dgrid{grid-template-columns:1fr}
  .fcols{grid-template-columns:1fr}
  .fbar{flex-direction:column;gap:6px}
}