/**
 * Cover · /engine.html + /en/engine.html
 * Site Dock on the left. Logo sits on the page. Locale switch stays site-right.
 * Does not touch locked cosmos / me / fold / almanac shells.
 */

.engine-body {
  margin: 0;
  min-height: 100vh;
  background: var(--site-bg, #f7f6f3);
  color: var(--site-ink, #37352f);
  font-family: "Noto Sans SC", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
}

.engine-page {
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
  min-width: 0;
}

.engine-brand {
  /* 通书 / 小程序 lockup 等比放大，贴桌面封面 */
  --engine-brand-scale: 1.75;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: calc(0.28rem * var(--engine-brand-scale));
  margin: 0 0 1.75rem;
  text-decoration: none;
  color: inherit;
}

.engine-brand__logo {
  display: block;
  height: calc(0.72rem * var(--engine-brand-scale));
  width: auto;
  max-width: calc(1.7rem * var(--engine-brand-scale));
  object-fit: contain;
}

.engine-brand__copy {
  min-width: 0;
  text-align: left;
}

.engine-brand__kicker {
  display: block;
  font-size: calc(0.68rem * var(--engine-brand-scale));
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
}

.engine-brand__zh {
  display: block;
  margin: calc(0.1rem * var(--engine-brand-scale)) 0 0;
  font-size: calc(1.05rem * var(--engine-brand-scale));
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.engine-brand__en {
  display: block;
  margin: calc(0.08rem * var(--engine-brand-scale)) 0 0;
  font-size: calc(0.72rem * var(--engine-brand-scale));
  letter-spacing: 0.06em;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
  line-height: 1.2;
}

.engine-hero {
  padding: 2.75rem 0 2rem;
  text-align: center;
  max-width: 42rem;
  margin: 0 auto;
}

.engine-hero__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
}

.engine-hero h1 {
  margin: 0 0 1rem;
  font-family: Fraunces, "Noto Serif SC", Georgia, serif;
  font-size: clamp(1.75rem, 4vw, 2.55rem);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.engine-hero__lede {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
  font-size: 1.02rem;
}

.engine-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.engine-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  border-radius: 0.55rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-card, #fff);
  color: var(--site-ink, #37352f);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.engine-btn:hover {
  border-color: rgba(26, 60, 94, 0.35);
}

.engine-btn--primary {
  background: var(--site-accent, #1a3c5e);
  border-color: transparent;
  color: #fff;
}

.engine-btn--primary:hover {
  filter: brightness(1.06);
  border-color: transparent;
}

.engine-btn--ghost {
  background: transparent;
}

.engine-install {
  margin: 0 auto 2.5rem;
  max-width: 36rem;
  padding: 0.85rem 1rem;
  border-radius: 0.65rem;
  background: #0f1724;
  color: #e8eef7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  text-align: left;
  overflow-x: auto;
}

.engine-install code {
  background: none;
  color: inherit;
  padding: 0;
}

.engine-section {
  padding: 2rem 0;
}

.engine-section__title {
  margin: 0 0 0.65rem;
  text-align: center;
  font-family: Fraunces, "Noto Serif SC", Georgia, serif;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.engine-section__lede {
  margin: 0 auto 1.75rem;
  max-width: 40rem;
  text-align: center;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
  font-size: 0.98rem;
}

.engine-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.engine-stat {
  padding: 1.15rem 1.1rem 1.25rem;
  border-radius: 0.85rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-card, #fff);
  box-shadow: 0 1px 0 rgba(55, 53, 47, 0.04);
}

.engine-stat__num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: Fraunces, Georgia, serif;
  font-size: 2rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--site-accent, #1a3c5e);
  line-height: 1.1;
}

.engine-stat__label {
  margin: 0 0 0.4rem;
  font-weight: 650;
  font-size: 0.95rem;
}

.engine-stat__body {
  margin: 0;
  font-size: 0.86rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
}

.engine-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.engine-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.2rem;
  border-radius: 0.85rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-card, #fff);
  box-shadow: 0 1px 0 rgba(55, 53, 47, 0.04);
  min-width: 0;
}

.engine-card__icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.45rem;
  display: grid;
  place-items: center;
  background: var(--site-muted, #efede8);
  color: var(--site-accent, #1a3c5e);
  font-size: 0.95rem;
  font-weight: 700;
}

.engine-card h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
}

.engine-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
  flex: 1;
}

.engine-code {
  margin: 0;
  padding: 0.85rem 0.95rem;
  border-radius: 0.55rem;
  background: #0f1724;
  color: #d7e2f0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  overflow-x: auto;
  white-space: pre;
}

.engine-banner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  align-items: flex-start;
  margin-top: 0.9rem;
  padding: 1.1rem 1.2rem;
  border-radius: 0.85rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-muted, #efede8);
}

.engine-banner__icon {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border-radius: 0.45rem;
  display: grid;
  place-items: center;
  background: var(--site-card, #fff);
  color: var(--site-accent, #1a3c5e);
  font-weight: 700;
}

.engine-banner__body {
  flex: 1 1 16rem;
  min-width: 0;
}

.engine-banner__body strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.98rem;
}

.engine-banner__body p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
}

.engine-banner__body code {
  font-size: 0.84em;
}

.engine-steps {
  display: grid;
  gap: 1rem;
  max-width: 40rem;
  margin: 0 auto;
}

.engine-step {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  gap: 0.85rem;
  align-items: start;
}

.engine-step__num {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--site-accent, #1a3c5e);
  color: #fff;
  font-weight: 700;
  font-size: 0.92rem;
}

.engine-step__body h3 {
  margin: 0.15rem 0 0.35rem;
  font-size: 1.02rem;
}

.engine-step__body p {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
}

.engine-step__body .engine-code {
  margin-top: 0.25rem;
}

.engine-price {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  max-width: 44rem;
  margin: 0 auto;
}

.engine-price-card {
  padding: 1.25rem;
  border-radius: 0.85rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-card, #fff);
}

.engine-price-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.engine-price-card__tag {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
}

.engine-price-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
}

.engine-price-card li + li {
  margin-top: 0.35rem;
}

.engine-cta {
  margin-top: 2.5rem;
  padding: 1.75rem 1.25rem;
  border-radius: 1rem;
  border: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  background: var(--site-card, #fff);
  text-align: center;
}

.engine-cta h2 {
  margin: 0 0 0.5rem;
  font-family: Fraunces, "Noto Serif SC", Georgia, serif;
  font-size: 1.45rem;
}

.engine-cta p {
  margin: 0 auto 1.1rem;
  max-width: 32rem;
  color: var(--site-ink-soft, rgba(55, 53, 47, 0.72));
  font-size: 0.95rem;
}

.engine-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.engine-foot {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--site-line, rgba(55, 53, 47, 0.12));
  text-align: center;
  font-size: 0.82rem;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
}

.engine-foot a {
  color: inherit;
}

.engine-copy-note {
  margin: 0.55rem 0 0;
  min-height: 1.2em;
  font-size: 0.82rem;
  color: var(--site-ink-mute, rgba(55, 53, 47, 0.58));
  text-align: center;
}

@media (max-width: 860px) {
  .engine-stats,
  .engine-cards,
  .engine-price {
    grid-template-columns: 1fr;
  }
}

html.theme-night .engine-btn--primary,
html.theme-night .engine-step__num {
  background: #c9a46a;
  color: #1a1208 !important;
}

html.theme-night .engine-stat__num,
html.theme-night .engine-card__icon,
html.theme-night .engine-banner__icon {
  color: #c9a46a;
}

html.theme-night .engine-install,
html.theme-night .engine-code {
  background: #06101f;
  color: #e4ecf8;
}