/* Tianzhi Home · mobile first */
:root {
  --home-bg: #f6f0e6;
  --home-paper: #fffdf6;
  --home-paper-strong: #fff9ec;
  --home-ink: #241b12;
  --home-muted: #74695d;
  --home-accent: #8d5e20;
  --home-accent-strong: #6f4614;
  --home-line: rgba(78, 56, 32, .15);
  --home-shadow: 0 18px 48px rgba(59, 43, 24, .10);
  --home-radius: 24px;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body.tz-home {
  margin: 0;
  min-height: 100svh;
  color: var(--home-ink);
  background:
    radial-gradient(circle at 18% 0%, rgba(214, 174, 94, .16), transparent 30rem),
    linear-gradient(180deg, #fffaf1 0%, var(--home-bg) 48%, #f1eadf 100%);
  font-family: ui-serif, "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
}

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

.home-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: calc(.65rem + env(safe-area-inset-top)) .95rem .65rem;
  border-bottom: 1px solid rgba(78, 56, 32, .10);
  background: rgba(255, 250, 240, .9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.home-brand {
  flex: 0 0 auto;
  font-weight: 900;
  letter-spacing: .08em;
  white-space: nowrap;
}

.home-nav {
  display: flex;
  justify-content: flex-end;
  gap: .25rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.home-nav::-webkit-scrollbar {
  display: none;
}

.home-nav a {
  flex: 0 0 auto;
  padding: .42rem .58rem;
  border-radius: 999px;
  color: var(--home-muted);
  font-size: .92rem;
}

.home-nav a[aria-current="page"] {
  color: var(--home-ink);
  background: rgba(87, 58, 26, .10);
}

.home-main {
  width: min(1080px, 100%);
  margin: 0 auto;
  padding: 1.15rem .9rem 2rem;
}

.home-hero {
  padding: 1.45rem .15rem 1.4rem;
}

.home-eyebrow {
  margin: 0 0 .65rem;
  color: var(--home-accent);
  font-size: .84rem;
  font-weight: 800;
  letter-spacing: .14em;
}

.home-hero h1 {
  margin: 0;
  font-size: clamp(3.2rem, 16vw, 7rem);
  line-height: .98;
  letter-spacing: -.08em;
}

.home-subtitle {
  margin: .85rem 0 0;
  color: var(--home-ink);
  font-size: clamp(1.35rem, 6vw, 2.2rem);
  font-weight: 800;
  line-height: 1.35;
}

.home-summary {
  margin: 1.05rem 0 0;
  max-width: 48rem;
  color: var(--home-muted);
  font-size: clamp(1.02rem, 4.5vw, 1.18rem);
  line-height: 1.95;
}

.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.35rem;
}

.home-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: .72rem 1.08rem;
  border: 1px solid var(--home-line);
  border-radius: 999px;
  background: rgba(255, 253, 246, .82);
  color: var(--home-ink);
  font-weight: 800;
  box-shadow: 0 8px 22px rgba(59, 43, 24, .045);
}

.home-button--primary {
  color: #fffaf0;
  border-color: rgba(111, 70, 20, .2);
  background: linear-gradient(135deg, #8d5e20, #b78334);
  box-shadow: 0 14px 34px rgba(111, 70, 20, .18);
}

.home-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  margin-top: .5rem;
}

.home-card,
.home-feature {
  border: 1px solid var(--home-line);
  border-radius: var(--home-radius);
  background:
    linear-gradient(135deg, rgba(255, 253, 246, .94), rgba(255, 248, 232, .72)),
    var(--home-paper);
  box-shadow: 0 10px 28px rgba(59, 43, 24, .055);
}

.home-card {
  padding: 1.05rem;
}

.home-card-icon {
  width: 2.55rem;
  height: 2.55rem;
  display: grid;
  place-items: center;
  margin-bottom: .85rem;
  border-radius: 16px;
  background: rgba(141, 94, 32, .10);
  font-size: 1.35rem;
}

.home-card h2,
.home-feature h2 {
  margin: 0;
  font-size: clamp(1.35rem, 6vw, 2rem);
  line-height: 1.25;
  letter-spacing: -.04em;
}

.home-card p,
.home-feature p {
  margin: .65rem 0 0;
  color: var(--home-muted);
  font-size: 1rem;
  line-height: 1.82;
}

.home-text-link {
  display: inline-flex;
  margin-top: .85rem;
  color: var(--home-accent-strong);
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: .22em;
}

.home-feature {
  display: grid;
  gap: 1rem;
  align-items: center;
  margin-top: .95rem;
  padding: 1.15rem;
  background:
    radial-gradient(circle at 88% 12%, rgba(214, 174, 94, .18), transparent 14rem),
    linear-gradient(135deg, rgba(255, 250, 238, .98), rgba(255, 253, 247, .94));
  box-shadow: var(--home-shadow);
}

.home-feature-text {
  max-width: 42rem;
}

.home-footer {
  padding: 1.45rem .9rem calc(1.8rem + env(safe-area-inset-bottom));
  border-top: 1px solid rgba(78, 56, 32, .12);
  color: var(--home-muted);
  text-align: center;
  font-size: .86rem;
  line-height: 1.75;
}

.home-footer p {
  margin: .18rem 0;
}

.home-footer a {
  text-decoration: underline;
  text-underline-offset: .18em;
}

@media (min-width: 720px) {
  .home-main {
    padding-top: 2.2rem;
  }

  .home-hero {
    padding-block: 3.4rem 2.2rem;
  }

  .home-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
  }

  .home-card--wide {
    grid-column: span 3;
  }

  .home-card {
    padding: 1.25rem;
  }

  .home-feature {
    grid-template-columns: 1fr auto;
    padding: 1.45rem;
  }
}

@media (min-width: 960px) {
  .home-topbar {
    padding-inline: max(2rem, calc((100vw - 1080px) / 2));
  }

  .home-card--wide {
    grid-column: span 1;
  }

  .home-card-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}