:root{
  --bg-top:#0a0612; --bg-bot:#1a0a2e;
  --gold:#c8a96a; --gold-bright:#daa520; --gold-soft:rgba(218,165,32,.2);
  --txt:rgba(255,255,255,.85); --txt-dim:rgba(255,255,255,.55);
  --strong:rgba(255,200,100,.95);
  --card:rgba(218,165,32,.05); --line:rgba(218,165,32,.25);
  --maxw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(180deg,var(--bg-top) 0%,var(--bg-bot) 100%);
  background-attachment:fixed; color:var(--txt); line-height:1.8; font-size:15px;
}
a{color:var(--gold);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,6,18,.85);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--gold-soft)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.nav .logo{color:var(--gold);font-size:18px;letter-spacing:3px;font-weight:400}
.nav .links{display:flex;gap:22px;list-style:none}
.nav .links a{color:var(--txt-dim);font-size:14px;letter-spacing:1px}
.nav .links a:hover,.nav .links a.active{color:var(--gold)}
.nav .burger{display:none;background:none;border:0;color:var(--gold);font-size:24px;cursor:pointer}
/* hero */
.hero{text-align:center;padding:96px 0 72px;position:relative;overflow:hidden}
.hero h1{font-size:42px;font-weight:300;letter-spacing:10px;color:var(--gold);margin-bottom:16px}
.hero .tag{font-size:16px;letter-spacing:4px;color:var(--txt-dim);margin-bottom:36px}
.hero .splash{width:120px;margin:0 auto 28px;opacity:.9}
.btn{display:inline-block;padding:13px 34px;border:1px solid var(--gold);border-radius:999px;
  color:var(--gold);letter-spacing:2px;transition:all .2s}
.btn:hover{background:rgba(218,165,32,.12)}
.btn-primary{background:var(--gold);color:#1a0a2e;font-weight:600}
.btn-primary:hover{background:var(--gold-bright)}
/* section */
section{padding:64px 0}
.sec-title{text-align:center;color:var(--gold);font-weight:400;font-size:26px;letter-spacing:3px;margin-bottom:14px}
.sec-sub{text-align:center;color:var(--txt-dim);font-size:14px;letter-spacing:2px;margin-bottom:40px}
.about p{max-width:760px;margin:0 auto;text-align:center;color:var(--txt)}
/* feature rows */
.feat{display:flex;align-items:center;gap:48px;max-width:900px;margin:0 auto 56px;padding:28px;
  background:var(--card);border:1px solid var(--line);border-radius:16px}
.feat:nth-child(even){flex-direction:row-reverse}
.feat .media{flex:0 0 200px;text-align:center}
.feat .media img{width:160px;margin:0 auto;filter:drop-shadow(0 6px 20px rgba(0,0,0,.4))}
.feat .body{flex:1}
.feat .body .k{color:var(--gold-bright);font-size:13px;letter-spacing:3px;margin-bottom:8px}
.feat .body h3{color:var(--strong);font-size:22px;font-weight:500;margin-bottom:12px}
.feat .body p{color:var(--txt)}
.feat.lead{background:rgba(218,165,32,.09);border-color:rgba(218,165,32,.5)}
.feat.lead .body h3{font-size:26px}
/* experience */
.exp{text-align:center}
.exp .qrbox{width:200px;height:200px;margin:0 auto 16px;border:1px dashed var(--line);border-radius:12px;
  display:flex;align-items:center;justify-content:center;color:var(--txt-dim);font-size:13px;text-align:center;padding:16px}
.exp .row{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-top:24px}
.exp .appnote{color:var(--txt-dim);font-size:13px;margin-top:22px}
/* footer */
.footer{border-top:1px solid var(--gold-soft);padding:40px 0 56px;margin-top:32px}
.footer .disc{max-width:820px;margin:0 auto 24px;color:var(--txt-dim);font-size:13px;line-height:1.9;
  background:var(--card);border-left:3px solid var(--line);padding:14px 18px;border-radius:0 8px 8px 0}
.footer .meta{text-align:center;color:var(--txt-dim);font-size:13px;line-height:2}
.footer .meta a{color:var(--txt-dim)}
.footer .meta a:hover{color:var(--gold)}
/* legal page */
.legal{max-width:820px;margin:0 auto;padding:32px 24px 72px}
.legal .back{display:inline-block;margin-bottom:20px;font-size:13px;letter-spacing:1px}
.legal h1{color:var(--gold);font-weight:400;font-size:24px;text-align:center;letter-spacing:2px;margin:8px 0 28px}
.legal h3{color:var(--gold-bright);font-weight:500;font-size:17px;margin:30px 0 10px;
  border-left:3px solid rgba(218,165,32,.6);padding-left:12px}
.legal p{margin:11px 0}
.legal strong{color:var(--strong)}
.legal .preamble{background:var(--card);border-left:3px solid rgba(218,165,32,.4);padding:16px 20px;
  border-radius:0 8px 8px 0;margin:16px 0 24px}
.legal ul,.legal ol{padding-left:22px}.legal li{margin:6px 0}
.legal .last-update{text-align:right;color:var(--txt-dim);font-size:12px;margin-top:28px;
  padding-top:14px;border-top:1px dashed rgba(255,255,255,.1)}
/* responsive */
@media(max-width:760px){
  .nav .links{position:absolute;top:60px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(10,6,18,.97);border-bottom:1px solid var(--gold-soft);display:none}
  .nav .links.open{display:flex}
  .nav .links a{padding:14px 24px;border-top:1px solid rgba(255,255,255,.05)}
  .nav .burger{display:block}
  .hero h1{font-size:30px;letter-spacing:6px}
  .feat,.feat:nth-child(even){flex-direction:column;gap:20px;text-align:center}
  .feat .media{flex:none}
}