.explore-hero {
  padding: 7.5rem 0 5.5rem;
  border-bottom: 1px solid var(--cream-border);
  background:
    radial-gradient(circle at 86% 16%, rgba(176, 141, 87, 0.14), transparent 29%),
    linear-gradient(135deg, var(--cream), #f7f3ea 68%, var(--cream-dark));
}

.explore-inner {
  width: min(1180px, calc(100% - 5rem));
  margin: 0 auto;
}

.explore-kicker,
.domain-kicker,
.route-kicker,
.shelf-label {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.explore-hero h1 {
  max-width: 850px;
  margin: 1.2rem 0 1.4rem;
  font-size: clamp(3.4rem, 7vw, 6.8rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.025em;
}

[data-lang="zh"] .explore-hero h1,
[data-lang="zh-hant"] .explore-hero h1 {
  font-family: var(--reading-cjk), serif;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.explore-deck {
  max-width: 720px;
  color: var(--ink-light);
  font-size: 1.16rem;
  line-height: 1.85;
}

[data-lang="zh"] .explore-deck,
[data-lang="zh-hant"] .explore-deck {
  font-family: var(--reading-cjk), serif;
  line-height: 2;
}

.explore-jump-grid {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  border: 1px solid var(--cream-border);
  background: var(--cream-border);
}

.explore-jump-grid a {
  min-height: 125px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem;
  background: rgba(245, 240, 232, 0.95);
  color: var(--ink);
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.25;
}

.explore-jump-grid a:hover {
  background: var(--green);
  color: var(--cream);
}

.jump-number {
  font-family: var(--sans);
  font-size: 0.58rem;
  color: var(--gold);
}

.domain-section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--cream-border);
  scroll-margin-top: 64px;
}

.domain-section.alt {
  background: var(--cream-dark);
}

.domain-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: 5rem;
  align-items: start;
}

.domain-heading {
  position: sticky;
  top: 105px;
}

.domain-number {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-family: var(--sans);
  font-size: 0.66rem;
  color: var(--ink-muted);
}

.domain-heading h2 {
  margin: 0.65rem 0 1.2rem;
  font-size: clamp(2.4rem, 4.5vw, 4.7rem);
  font-weight: 400;
  line-height: 1.02;
}

.domain-heading .domain-question {
  margin-bottom: 1rem;
  font-size: 1.2rem;
  line-height: 1.45;
  color: var(--green);
}

.domain-heading .domain-desc {
  color: var(--ink-light);
  line-height: 1.8;
}

[data-lang="zh"] .domain-heading,
[data-lang="zh-hant"] .domain-heading,
[data-lang="zh"] .shelf-grid,
[data-lang="zh-hant"] .shelf-grid,
[data-lang="zh"] .route-card,
[data-lang="zh-hant"] .route-card {
  font-family: var(--reading-cjk), serif;
}

.shelf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--cream-border);
  border: 1px solid var(--cream-border);
}

.shelf-link {
  min-height: 145px;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.3rem;
  background: var(--cream);
  color: var(--ink);
  text-decoration: none;
}

.alt .shelf-link {
  background: #f4efe6;
}

.shelf-link:hover {
  background: rgba(176, 141, 87, 0.1);
}

.shelf-link h3 {
  margin: 0.55rem 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.3;
}

.shelf-link p {
  color: var(--ink-muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.shelf-arrow {
  margin-top: auto;
  padding-top: 0.8rem;
  color: var(--gold);
}

.domain-begin {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 1.2rem;
  align-items: center;
  margin-top: 1rem;
  padding: 1.25rem 1.3rem;
  border: 1px solid var(--green);
  color: var(--ink);
  text-decoration: none;
}

.domain-begin span:first-child {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-light);
}

.domain-begin strong {
  font-size: 1.06rem;
  font-weight: 500;
}

.domain-begin:hover {
  background: var(--green);
  color: var(--cream);
}

.domain-begin:hover span:first-child {
  color: var(--gold-light);
}

.routes-section {
  padding: 6.5rem 0;
  background: var(--green);
  color: var(--cream);
}

.routes-heading {
  max-width: 760px;
  margin-bottom: 3rem;
}

.routes-heading h2 {
  margin: 0.8rem 0 1rem;
  font-size: clamp(2.7rem, 5vw, 5rem);
  font-weight: 400;
  line-height: 1.03;
}

.routes-heading p {
  color: rgba(245, 240, 232, 0.72);
  line-height: 1.8;
}

.route-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(245, 240, 232, 0.2);
  border: 1px solid rgba(245, 240, 232, 0.2);
}

.route-card {
  padding: 1.7rem;
  background: var(--green);
}

.route-card h3 {
  margin: 0.65rem 0 0.45rem;
  font-size: 1.45rem;
  font-weight: 500;
}

.route-card > p {
  color: rgba(245, 240, 232, 0.66);
  font-size: 0.9rem;
}

.route-list {
  margin-top: 1.3rem;
  padding: 0;
  list-style: none;
  counter-reset: route;
}

.route-list li {
  counter-increment: route;
  display: grid;
  grid-template-columns: 25px 1fr;
  gap: 0.55rem;
  padding: 0.65rem 0;
  border-top: 1px solid rgba(245, 240, 232, 0.16);
}

.route-list li::before {
  content: counter(route, decimal-leading-zero);
  color: var(--gold-light);
  font-family: var(--sans);
  font-size: 0.58rem;
  padding-top: 0.15rem;
}

.route-list a {
  color: var(--cream);
  text-decoration: none;
  line-height: 1.35;
}

.route-list a:hover {
  color: var(--gold-light);
}

.library-door {
  padding: 4rem 0;
  border-bottom: 1px solid var(--cream-border);
}

.library-door-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.library-door h2 {
  font-size: 2.2rem;
  font-weight: 400;
}

.library-door p {
  max-width: 620px;
  color: var(--ink-light);
}

.library-door a {
  flex: 0 0 auto;
  padding: 0.8rem 1rem;
  border: 1px solid var(--green);
  color: var(--green);
  font-family: var(--sans);
  font-size: 0.67rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
}

@media (max-width: 900px) {
  .explore-jump-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .explore-jump-grid a:last-child {
    grid-column: 1 / -1;
  }

  .domain-layout {
    grid-template-columns: 1fr;
    gap: 2.6rem;
  }

  .domain-heading {
    position: static;
  }
}

@media (max-width: 660px) {
  .explore-inner {
    width: min(100% - 2.25rem, 1180px);
  }

  .explore-hero {
    padding: 5rem 0 3.5rem;
  }

  .explore-hero h1 {
    font-size: clamp(3rem, 15vw, 4.7rem);
  }

  .explore-jump-grid,
  .shelf-grid,
  .route-grid {
    grid-template-columns: 1fr;
  }

  .explore-jump-grid a:last-child {
    grid-column: auto;
  }

  .domain-section,
  .routes-section {
    padding: 4.2rem 0;
  }

  .shelf-link {
    min-height: 130px;
  }

  .domain-begin {
    grid-template-columns: 1fr auto;
  }

  .domain-begin span:first-child {
    grid-column: 1 / -1;
  }

  .library-door-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}