:root {
  --bg: #ebe7df;
  --paper: #f7f4ee;
  --ink: #1c1b19;
  --quiet: #6f6b64;
  --faint: #a39e95;
  --line: #d8d3c8;
  --fill: #1c1b19;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.kicker {
  display: block;
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--faint);
}

.wordmark {
  font-family: "Palatino Linotype", "STSong", "Songti SC", serif;
  font-size: 22px;
  letter-spacing: 0.38em;
  font-weight: 400;
}

.wordmark span {
  display: block;
  margin-top: 6px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--faint);
}

.mast {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 48px 0;
}

.mast nav {
  display: flex;
  align-items: baseline;
  gap: 28px;
  font-size: 12px;
  letter-spacing: 0.16em;
}

.mast nav a:hover { opacity: 0.55; }

.nav-download {
  padding-bottom: 2px;
  border-bottom: 1px solid var(--ink);
}

.hero {
  padding: 88px 48px 48px;
  max-width: 920px;
}

.hero h1 {
  margin: 0 0 22px;
  font-family: "Palatino Linotype", "STSong", "Songti SC", serif;
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 400;
  line-height: 1.25;
}

.lead {
  max-width: 520px;
  margin: 0 0 32px;
  color: var(--quiet);
  font-size: 16px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.save-btn {
  display: inline-flex;
  align-items: center;
  height: 42px;
  padding: 0 22px;
  background: var(--fill);
  color: var(--paper);
  letter-spacing: 0.2em;
  font-size: 12px;
}

.save-btn:hover { opacity: 0.86; }

.hint {
  margin: 0;
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.stage {
  padding: 0 48px 24px;
}

.stage-frame {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(260px, 0.88fr);
  max-width: 920px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.stage-left,
.stage-right {
  padding: 28px 32px;
}

.stage-right {
  border-left: 1px solid var(--line);
}

.stage-line {
  margin: 0 0 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
  font-size: 15px;
}

.stage-idea {
  margin: 0 0 12px;
  font-size: 14px;
  color: #3f3c37;
}

.stage-idea.faint { color: var(--faint); }

.stage-cover {
  aspect-ratio: 3 / 4;
  max-width: 220px;
  margin-top: 8px;
  background: #e4dfd4;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 8px;
  color: var(--quiet);
}

.stage-cover b {
  font-family: "Palatino Linotype", "STSong", serif;
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
}

.stage-cover span {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.block {
  padding: 72px 48px 0;
  max-width: 920px;
}

.block h2 {
  margin: 0 0 28px;
  font-family: "Palatino Linotype", "STSong", "Songti SC", serif;
  font-size: 28px;
  font-weight: 400;
}

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
}

.card {
  text-align: left;
  border-bottom: 1px solid var(--ink);
  padding: 8px 0 22px;
}

.card strong {
  display: block;
  margin: 8px 0 10px;
  font-size: 22px;
  font-weight: 500;
}

.card p {
  margin: 0;
  color: var(--quiet);
  font-size: 13px;
  line-height: 1.6;
}

.card.is-soon {
  border-bottom-color: var(--line);
  opacity: 0.55;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.steps strong {
  font-size: 15px;
  font-weight: 500;
}

.steps span {
  color: var(--quiet);
  font-size: 14px;
  line-height: 1.7;
}

.notes {
  display: grid;
  gap: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.notes p {
  margin: 0;
  max-width: 560px;
  color: var(--quiet);
  font-size: 15px;
  line-height: 1.85;
}

.download {
  padding-bottom: 8px;
}

.download .save-btn { margin: 8px 0 16px; }

.foot {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-top: 88px;
  padding: 28px 48px 40px;
  border-top: 1px solid var(--line);
}

.foot p {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--faint);
}

@media (max-width: 860px) {
  .mast,
  .hero,
  .stage,
  .block,
  .foot {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero { padding-top: 56px; }

  .mast {
    flex-direction: column;
    gap: 16px;
  }

  .cards,
  .stage-frame,
  .steps li {
    grid-template-columns: 1fr;
  }

  .stage-right { border-left: 0; border-top: 1px solid var(--line); }

  .foot {
    flex-direction: column;
    align-items: flex-start;
  }
}