:root{
  --ink:#0d0d11;
  --ink-2:#14141a;
  --line:#2a2a33;
  --gold:#b8860b;
  --gold-2:#d4af37;
  --paper:#f6f2ea;
  --paper-dim:#a9a49b;
  --serif:"Songti SC","STSong","Source Han Serif SC","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.9;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:720px;margin:0 auto;padding:0 24px}
a{color:var(--gold-2);text-decoration:none}
a:hover{text-decoration:underline}

header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(13,13,17,.92);backdrop-filter:blur(8px);z-index:9}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;max-width:720px;margin:0 auto}
.brand{font-family:var(--serif);font-size:18px;letter-spacing:.14em;color:var(--paper);white-space:nowrap}
.brand em{font-style:normal;color:var(--gold-2);font-size:13px;letter-spacing:.2em;margin-left:8px}
.nav ul{display:flex;gap:18px;list-style:none;font-size:14px;color:var(--paper-dim)}
.nav ul a{color:var(--paper-dim)}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--gold-2);text-decoration:none}
@media(max-width:640px){
  .nav{flex-direction:column;align-items:flex-start;gap:9px;padding:12px 20px}
  .nav ul{gap:14px;font-size:13px;flex-wrap:wrap}
}

.hero{padding:76px 0 56px;border-bottom:1px solid var(--line)}
.hero .kicker{font-size:13px;letter-spacing:.28em;color:var(--gold);margin-bottom:26px}
.hero h1{
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(30px,6.2vw,46px);
  line-height:1.5;
  letter-spacing:.04em;
}
.hero h1 .gd{color:var(--gold-2)}
.hero .who{margin-top:26px;font-size:15px;color:var(--paper-dim);letter-spacing:.06em}
@media(max-width:640px){.hero{padding:52px 0 40px}}

.pagetop{padding:64px 0 40px;border-bottom:1px solid var(--line)}
.pagetop h1{font-family:var(--serif);font-weight:400;font-size:clamp(26px,5vw,36px);letter-spacing:.06em;line-height:1.5}
.pagetop .sub{margin-top:18px;font-size:15px;color:var(--paper-dim);letter-spacing:.06em}
@media(max-width:640px){.pagetop{padding:46px 0 32px}}

section{padding:52px 0;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:0}
h2{
  font-family:var(--serif);
  font-weight:400;
  font-size:15px;
  letter-spacing:.3em;
  color:var(--gold);
  margin-bottom:28px;
}
p{margin-bottom:22px}
p:last-child{margin-bottom:0}
.lead{font-size:19px;line-height:1.95}
.hl{color:var(--gold-2)}
.edge{border-left:2px solid var(--gold);padding-left:18px;margin-bottom:14px;color:var(--paper)}
.muted{color:var(--paper-dim);font-size:15px}

.tiers{display:grid;gap:18px}
.tier{border:1px solid var(--line);background:var(--ink-2);padding:28px 26px}
.tier .tname{font-family:var(--serif);font-size:26px;letter-spacing:.16em;color:var(--gold-2);margin-bottom:6px}
.tier .tprice{font-size:14px;color:var(--paper-dim);letter-spacing:.1em;margin-bottom:18px}
.tier .tq{font-size:17px;margin-bottom:12px}
.tier .ta{font-size:15px;color:var(--paper-dim);line-height:1.85}

.case{border:1px solid var(--line);background:var(--ink-2);padding:30px 26px;margin-bottom:22px}
.case .ctag{font-size:12px;letter-spacing:.24em;color:var(--gold);margin-bottom:14px}
.case h3{font-family:var(--serif);font-weight:400;font-size:22px;letter-spacing:.1em;margin-bottom:20px;color:var(--paper)}
.case dl{margin:0}
.case dt{font-size:13px;letter-spacing:.16em;color:var(--gold);margin-bottom:6px}
.case dd{margin:0 0 20px;font-size:15.5px;color:var(--paper-dim);line-height:1.85}
.case dd:last-child{margin-bottom:0}
.case .bought{color:var(--paper);font-size:16px}

.qs{margin-bottom:30px}
.qs h3{font-family:var(--serif);font-weight:400;font-size:18px;color:var(--gold-2);letter-spacing:.06em;margin-bottom:12px;line-height:1.7}
.qs p{font-size:15.5px;color:var(--paper-dim);line-height:1.9}
.qs:last-child{margin-bottom:0}

.list{list-style:none}
.list li{border-bottom:1px solid var(--line);padding:22px 0}
.list li:last-child{border-bottom:0}
.list .lt{font-family:var(--serif);font-size:19px;color:var(--paper);letter-spacing:.04em;margin-bottom:8px}
.list .lt a{color:var(--paper)}
.list .lt a:hover{color:var(--gold-2);text-decoration:none}
.list .lm{font-size:13px;color:#6c6862;letter-spacing:.1em;margin-bottom:10px}
.list .ls{font-size:15px;color:var(--paper-dim);line-height:1.85}

footer{padding:44px 0 64px;font-size:15px;color:var(--paper-dim)}
footer .sig{font-family:var(--serif);font-size:19px;color:var(--paper);letter-spacing:.1em;margin-bottom:16px}
footer .rows{margin-bottom:22px}
footer .rows a{color:var(--gold-2)}
footer .fin{font-size:13px;color:#6c6862;letter-spacing:.06em}