:root { --paper: #f4efe6; --slip: #fffdf8; --ink: #23201b; --ink2: #5a5348; --ink3: #8a8174; --rule: #d9cfbf; --stamp: #b4432f; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.75;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  background-image: radial-gradient(rgba(35,32,27,.035) 1px, transparent 1px); background-size: 3px 3px; }
a { color: var(--stamp); }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
header.top { max-width: 920px; margin: 0 auto; padding: 28px 20px 0; display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.mark { font: 700 15px/1 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: .18em; text-transform: uppercase; color: var(--ink); text-decoration: none; }
.mark b { color: var(--stamp); }
nav a { color: var(--ink2); text-decoration: none; font-size: 14px; margin-left: 14px; }
nav a:hover { color: var(--stamp); }
main { max-width: 920px; margin: 0 auto; padding: 24px 20px 48px; }
.lede { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 40px; align-items: start; margin: 36px 0 44px; }
.lede > * { min-width: 0; }
h1 { font-family: "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif; font-weight: 700; font-size: 44px; line-height: 1.15; margin: 0; letter-spacing: -.01em; }
h1 small { display: block; font: 500 14px/1.6 ui-monospace, "SF Mono", Menlo, monospace; color: var(--ink3); letter-spacing: .08em; margin-top: 14px; }
.lede p { margin: 0 0 12px; color: var(--ink2); max-width: 38em; }
.slip { position: relative; background: var(--slip); padding: 26px 26px 30px; box-shadow: 0 1px 0 var(--rule), 0 10px 30px -18px rgba(35,32,27,.35); }
.slip::before, .slip::after { content: ""; position: absolute; left: 0; right: 0; height: 10px;
  background: radial-gradient(circle at 7px 0, transparent 6px, var(--slip) 6.5px) 0 0 / 14px 10px repeat-x; }
.slip::before { top: -10px; transform: scaleY(-1); }
.slip::after { bottom: -10px; }
.slip h2 { font: 700 13px/1 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: .2em; text-transform: uppercase; color: var(--ink3); margin: 0 0 16px; }
.row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 16px; align-items: baseline; padding: 14px 0; border-top: 1px dashed var(--rule); }
.row:first-of-type { border-top: 0; }
.row .name { font-weight: 650; }
.row .name a { color: var(--ink); }
.row .desc { grid-column: 1 / -1; color: var(--ink2); font-size: 14px; margin-top: -4px; }
.row .price { font: 600 15px ui-monospace, "SF Mono", Menlo, monospace; white-space: nowrap; }
.row .buy { grid-column: 1 / -1; justify-self: start; }
.btn { display: inline-block; border: 1.5px solid var(--ink); color: var(--ink); text-decoration: none; padding: 6px 14px; font: 600 14px ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: .04em; background: transparent; cursor: pointer; }
.btn:hover { background: var(--ink); color: var(--slip); }
.empty { color: var(--ink3); font-size: 14px; }
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; border-top: 1.5px solid var(--ink); padding-top: 22px; margin-top: 8px; }
.facts > div { min-width: 0; }
.facts h3 { font-size: 15px; margin: 0 0 6px; }
.facts p { margin: 0; font-size: 14px; color: var(--ink2); }
.stamp { display: inline-block; border: 2px solid var(--stamp); color: var(--stamp); padding: 2px 10px; transform: rotate(-4deg); font: 700 12px ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: .16em; text-transform: uppercase; }
#checkout { display: none; text-align: center; padding: 40px 0 10px; }
#checkout.on { display: block; }
#checkout h2 { font-family: "Songti SC", "STSong", Georgia, serif; font-size: 26px; margin: 18px 0 8px; }
#checkout p { color: var(--ink2); margin: 6px 0; }
body.checkout .lede, body.checkout .facts, body.checkout #store { display: none; }
.doc { max-width: 720px; }
.doc h1 { font-size: 34px; margin-bottom: 6px; }
.doc h2 { font-size: 19px; margin: 30px 0 8px; }
.doc .en { color: var(--ink2); }
.doc .meta { color: var(--ink3); font-size: 14px; font-family: ui-monospace, "SF Mono", Menlo, monospace; }
footer { max-width: 920px; margin: 0 auto; padding: 20px 20px 40px; border-top: 1px solid var(--rule); color: var(--ink3); font-size: 13px; display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer a { color: var(--ink2); }
@media (max-width: 720px) {
  .lede { grid-template-columns: minmax(0, 1fr); gap: 26px; margin-top: 20px; }
  h1 { font-size: 34px; }
  .facts { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  nav a { margin: 0 14px 0 0; }
}