:root{
  --paper:#FBFAF7; --ink:#23201B; --muted:#6B655A;
  --line:#E4E0D7; --seal:#B03A2E; --wash:#F3F1EB;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","PingFang SC",sans-serif;
}
.wrap{max-width:720px;margin:0 auto;padding:44px 24px 88px}
a{color:var(--seal);text-decoration:none;border-bottom:1px solid rgba(176,58,46,.28)}
a:hover{border-bottom-color:var(--seal)}
code,kbd,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

header.site{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:44px;
}
header.site .brand{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-weight:600;font-size:15px;letter-spacing:.06em;text-transform:uppercase;
}
header.site nav a{margin-left:18px;font-size:14px;color:var(--muted);border:0}
header.site nav a:hover{color:var(--seal)}

h1{font-size:30px;line-height:1.3;margin:0 0 12px;font-weight:600;letter-spacing:-.01em}
h2{font-size:19px;margin:40px 0 10px;font-weight:600}
h3{font-size:16px;margin:26px 0 6px;font-weight:600}
p{margin:0 0 14px}
.lede{font-size:18px;color:var(--muted);margin-bottom:28px}
ul{padding-left:20px;margin:0 0 14px}
li{margin:4px 0}
hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.small{font-size:14px;color:var(--muted)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}

.grid{display:grid;grid-template-columns:1fr;gap:14px;margin:22px 0}
.card{
  background:var(--wash);border:1px solid var(--line);border-radius:10px;padding:16px 18px;
}
.card h3{margin:0 0 4px}
.card p{margin:0;font-size:14.5px;color:var(--muted)}

.price{
  border:1px solid var(--line);border-radius:12px;padding:22px 24px;margin:26px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.price .amount{font-size:34px;font-weight:600;letter-spacing:-.02em}
.price .amount small{font-size:15px;color:var(--muted);font-weight:400}
.btn{
  display:inline-block;background:var(--seal);color:#fff;border:0;border-radius:8px;
  padding:12px 22px;font-size:15px;font-weight:600;cursor:pointer;
}
.btn.disabled{background:#C9C4B9;cursor:not-allowed}

.note{
  background:#FBF3F1;border-left:3px solid var(--seal);padding:12px 16px;border-radius:0 8px 8px 0;
  font-size:14.5px;color:#5A342E;margin:20px 0;
}

footer.site{
  border-top:1px solid var(--line);margin-top:56px;padding-top:18px;
  font-size:13.5px;color:var(--muted);
}
footer.site a{color:var(--muted)}