:root {
  --bg: #f7f2e4;
  --bg-soft: #fbf8f0;
  --ink: #2f281d;
  --ink-soft: #655d4f;
  --olive: #7f8350;
  --gold: #c8a448;
  --stone: #d2c6a7;
  --shadow: 0 28px 70px rgba(72, 57, 22, 0.12);
  --shadow-strong: 0 30px 80px rgba(64, 46, 12, 0.18);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content-width: min(1160px, calc(100vw - 32px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", "PingFang TC", "Microsoft JhengHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 246, 201, 0.78), transparent 30%),
    radial-gradient(circle at 85% 12%, rgba(210, 198, 167, 0.35), transparent 24%),
    linear-gradient(180deg, #f6f1df 0%, #f8f4ea 44%, #efe7d2 100%);
  overflow-x: clip;
}

img {
  display: block;
  max-width: 100%;
}

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

.page-shell {
  position: relative;
  overflow: clip;
}

.hero,
.promo-section,
.thesis-section,
.structure-section,
.deepread-section,
.reader-section,
.pdf-section,
.cta-section {
  width: var(--content-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero {
  min-height: 100svh;
  padding: 24px 0 88px;
}

.hero-noise {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.46), rgba(255, 255, 255, 0) 42%),
    radial-gradient(circle at 22% 28%, rgba(232, 222, 182, 0.62), transparent 26%),
    radial-gradient(circle at 82% 18%, rgba(201, 164, 72, 0.18), transparent 18%);
  pointer-events: none;
}

.topbar,
.hero-grid,
.promo-section,
.thesis-section,
.structure-section,
.deepread-section,
.reader-section,
.pdf-section,
.cta-section {
  position: relative;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand,
.top-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(101, 93, 79, 0.14);
  background: rgba(255, 255, 255, 0.54);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 30px rgba(111, 88, 31, 0.07);
}

.brand-code {
  letter-spacing: 0.16em;
  color: var(--olive);
  font-weight: 800;
}

.brand-name,
.top-link-strong {
  font-weight: 800;
}

.top-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.top-link-strong {
  color: #fff;
  background: linear-gradient(135deg, #947135, #c59d47);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 30px;
  align-items: center;
  padding-top: 58px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--olive);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.cta-copy h2 {
  margin: 0;
  font-family: "Noto Serif TC", "PingFang TC", serif;
  line-height: 1.08;
}

.hero h1 {
  font-size: clamp(3rem, 10vw, 5.7rem);
  max-width: 7ch;
  text-wrap: balance;
}

.hero-subtitle {
  margin: 18px 0 0;
  color: #836525;
  font-size: clamp(1.35rem, 4vw, 2rem);
  font-family: "Noto Serif TC", serif;
}

.hero-lead,
.section-heading p,
.thesis-card p,
.structure-copy p,
.reader-card p,
.cta-copy p {
  line-height: 1.88;
  color: var(--ink-soft);
}

.hero-lead {
  max-width: 44rem;
  margin: 22px 0 0;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.meta-pill {
  min-width: 140px;
  padding: 14px 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(139, 121, 65, 0.12);
}

.meta-pill span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8f8265;
}

.meta-pill strong {
  display: block;
  margin-top: 8px;
  font-size: 1.02rem;
}

.hero-actions,
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, #9f7b37, #d1a94d);
  box-shadow: 0 18px 34px rgba(153, 118, 35, 0.22);
}

.button-secondary {
  border: 1px solid rgba(95, 78, 29, 0.16);
  background: rgba(255, 255, 255, 0.65);
  color: var(--ink);
}

.hero-visual {
  justify-self: end;
  width: min(100%, 34rem);
}

.cover-stage {
  position: relative;
  min-height: 34rem;
  display: grid;
  place-items: center;
}

.cover-halo {
  position: absolute;
  border-radius: 50%;
  filter: blur(16px);
}

.cover-halo-a {
  width: 20rem;
  height: 20rem;
  top: 0;
  right: 0;
  background: radial-gradient(circle, rgba(255, 238, 167, 0.8), transparent 66%);
}

.cover-halo-b {
  width: 18rem;
  height: 18rem;
  bottom: 8%;
  left: 4%;
  background: radial-gradient(circle, rgba(185, 200, 146, 0.54), transparent 72%);
}

.hero-book {
  position: relative;
  z-index: 1;
  width: min(100%, 32rem);
  filter: drop-shadow(0 34px 52px rgba(88, 67, 18, 0.24));
}

.section-heading {
  max-width: 52rem;
}

.section-heading h2 {
  font-size: clamp(2rem, 5vw, 3.45rem);
  color: #3f3114;
}

.promo-section,
.thesis-section,
.structure-section,
.deepread-section,
.reader-section,
.pdf-section {
  padding-top: 112px;
}

.poster-section {
  width: var(--content-width);
  margin: 0 auto;
  padding-top: 36px;
}

.poster-grid {
  display: grid;
  gap: 22px;
}

.poster-card,
.thesis-card,
.structure-copy,
.reader-card,
.cta-section {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.poster-card {
  overflow: hidden;
  border: 1px solid rgba(126, 105, 51, 0.12);
  background: rgba(255, 255, 255, 0.62);
}

.promo-carousel {
  margin-top: 28px;
  padding: 22px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(120, 99, 43, 0.14);
  box-shadow: var(--shadow);
}

.promo-track {
  position: relative;
}

.promo-slide {
  display: none;
  border-radius: calc(var(--radius-xl) - 8px);
  overflow: hidden;
  cursor: pointer;
}

.promo-slide.is-active {
  display: block;
}

.promo-visual,
.promo-visual img {
  display: block;
  width: 100%;
}

.promo-visual img {
  border-radius: calc(var(--radius-xl) - 8px);
  box-shadow: 0 18px 40px rgba(88, 67, 18, 0.12);
}

.promo-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
}

.promo-dots {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex: 1;
}

.promo-dot,
.promo-arrow {
  border: 0;
  cursor: pointer;
}

.promo-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(91, 78, 38, 0.22);
}

.promo-dot.is-active {
  background: #9f7b37;
}

.promo-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.84);
  color: #684f18;
  font-size: 1.5rem;
  box-shadow: 0 10px 20px rgba(92, 70, 19, 0.12);
}

.thesis-grid,
.reader-grid {
  display: grid;
  gap: 18px;
}

.thesis-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
}

.thesis-card,
.structure-copy,
.reader-card {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(126, 105, 51, 0.12);
}

.thesis-card,
.reader-card {
  padding: 28px;
}

.thesis-card span {
  display: inline-flex;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(201, 164, 72, 0.15);
  color: #8e6921;
  font-weight: 800;
}

.thesis-card h3,
.reader-card h3,
.dialogue-card h3 {
  margin: 16px 0 12px;
  font-family: "Noto Serif TC", serif;
  font-size: 1.52rem;
}

.structure-layout {
  max-width: 860px;
  margin-top: 30px;
  margin-left: auto;
  margin-right: auto;
}

.structure-copy {
  position: relative;
  padding: 32px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(127, 131, 80, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(127, 131, 80, 0.08) 1px, transparent 1px),
    rgba(255, 255, 255, 0.72);
  background-size: 34px 34px;
}

.structure-copy::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px dashed rgba(127, 131, 80, 0.22);
  border-radius: 24px;
  pointer-events: none;
}

.map-intro {
  position: relative;
  margin-top: 0;
}

.structure-list {
  position: relative;
  list-style: none;
  padding: 0 0 0 22px;
  margin: 26px 0 0;
  display: grid;
  gap: 16px;
}

.structure-list::before {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 21px;
  width: 2px;
  background: linear-gradient(180deg, rgba(127, 131, 80, 0.16), rgba(200, 164, 72, 0.72), rgba(127, 131, 80, 0.16));
}

.structure-list li {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 20px 18px 0;
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.78);
  border: 1px solid rgba(127, 131, 80, 0.12);
  line-height: 1.8;
}

.map-marker {
  position: relative;
  z-index: 1;
  width: 44px;
  height: 44px;
  border-radius: 50% 50% 50% 10px;
  background: linear-gradient(135deg, #7f8350, #c8a448);
  color: #fff;
  transform: rotate(-45deg);
  box-shadow: 0 12px 24px rgba(92, 70, 19, 0.16);
}

.map-marker span {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 900;
  transform: rotate(45deg);
  line-height: 1;
}

.map-marker + div {
  padding-top: 1px;
}

.map-marker + div strong {
  display: block;
  color: #342810;
  font-family: "Noto Serif TC", serif;
  font-size: 1.15rem;
}

.map-marker + div p {
  margin: 6px 0 0;
}

.structure-note {
  position: relative;
  margin: 22px 0 0;
  padding: 16px 18px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-radius: 18px;
  background: rgba(127, 131, 80, 0.1);
  border: 1px solid rgba(127, 131, 80, 0.14);
}

.structure-note span {
  color: #8e6921;
  font-size: 1.1rem;
  line-height: 1.8;
}

.deepread-dialogues {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.dialogue-card {
  max-width: 46rem;
  padding: 24px 26px;
  border-radius: 28px 28px 28px 10px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(126, 105, 51, 0.14);
  box-shadow: 0 20px 40px rgba(86, 67, 21, 0.08);
}

.dialogue-card::after {
  content: "";
  display: block;
  width: 22px;
  height: 22px;
  margin-top: 14px;
  background: inherit;
  border-left: 1px solid rgba(126, 105, 51, 0.14);
  border-bottom: 1px solid rgba(126, 105, 51, 0.14);
  transform: rotate(-45deg);
  transform-origin: center;
}

.dialogue-card-alt {
  margin-left: auto;
  border-radius: 28px 28px 10px 28px;
  background: linear-gradient(180deg, rgba(248, 243, 224, 0.92), rgba(241, 234, 208, 0.88));
}

.dialogue-card-alt::after {
  margin-left: auto;
  border-left: 0;
  border-right: 1px solid rgba(126, 105, 51, 0.14);
  transform: rotate(45deg);
}

.dialogue-kicker {
  margin: 0 0 10px;
  color: #8e6921;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 800;
}

.dialogue-card h3 {
  margin-top: 0;
  color: #342810;
}

.dialogue-card p:last-child {
  margin-bottom: 0;
  line-height: 1.9;
  color: var(--ink-soft);
}

.reader-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 30px;
}

.pdf-viewer-outer {
  max-width: 800px;
  margin: 3rem auto 0;
  overflow: hidden;
  border-radius: 12px;
  background: #f8f8f7;
  border: 1px solid rgba(126, 105, 51, 0.14);
}

.pdf-viewer-inner {
  position: relative;
  aspect-ratio: 1 / 1.414;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  outline: none;
}

.pdf-page-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.pdf-main-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
  transition: opacity 0.26s ease, transform 0.36s ease;
}

.pdf-nav-layer {
  position: absolute;
  inset: 0;
  display: flex;
  z-index: 3;
}

.nav-hitbox {
  flex: 1 1 0;
  cursor: pointer;
  transition: background 0.22s ease;
}

.nav-hitbox.left:hover {
  background: linear-gradient(90deg, rgba(47, 36, 12, 0.05), transparent 68%);
}

.nav-hitbox.right:hover {
  background: linear-gradient(-90deg, rgba(47, 36, 12, 0.05), transparent 68%);
}

.pdf-loading-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink-soft);
  font-weight: 800;
  z-index: 4;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.pdf-loading-state.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  border: 2px solid rgba(95, 78, 29, 0.16);
  border-top-color: #5f4e1d;
  animation: spin 0.9s linear infinite;
}

.pdf-viewer-footer {
  min-height: 74px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: rgba(248, 248, 247, 0.94);
  border-top: 1px solid rgba(126, 105, 51, 0.12);
}

.pdf-pagination {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.pdf-action {
  display: flex;
}

.nav-icon-btn {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(95, 78, 29, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.nav-icon-btn:hover {
  transform: translateY(-1px);
  background: #fff;
}

.nav-icon-btn.is-disabled {
  opacity: 0.38;
  cursor: default;
  pointer-events: none;
}

.page-count {
  min-width: 4.5rem;
  color: var(--ink-soft);
  font-weight: 800;
  text-align: center;
}

.page-count strong {
  color: var(--ink);
}

.pdf-download-link {
  min-height: 42px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid rgba(95, 78, 29, 0.16);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease;
}

.pdf-download-link:hover {
  transform: translateY(-1px);
  background: #fff;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.cta-section {
  margin-top: 112px;
  margin-bottom: 140px;
  padding: 42px;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 22px;
  align-items: center;
  background:
    radial-gradient(circle at top right, rgba(242, 224, 165, 0.22), transparent 24%),
    linear-gradient(140deg, rgba(74, 57, 21, 0.96), rgba(124, 103, 51, 0.94));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.cta-copy .eyebrow,
.cta-copy p {
  color: rgba(255, 255, 255, 0.78);
}

.cta-copy h2 {
  font-size: clamp(2rem, 5vw, 3.4rem);
}

.floating-buy {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 10;
  min-height: 52px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #816226;
  color: white;
  box-shadow: 0 24px 48px rgba(80, 61, 16, 0.22);
  transform: translateY(110px);
  opacity: 0;
  transition: transform 220ms ease, opacity 220ms ease;
}

.floating-buy.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible,
.reveal-on-load {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-grid,
  .structure-layout,
  .cta-section {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    justify-self: stretch;
  }

  .cover-stage {
    min-height: 28rem;
  }

  .thesis-grid,
  .reader-grid {
    grid-template-columns: 1fr;
  }

  .dialogue-card,
  .dialogue-card-alt {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .hero {
    padding-bottom: 64px;
  }

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

  .promo-carousel,
  .thesis-card,
  .structure-copy,
  .reader-card,
  .cta-section {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-actions,
  .cta-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .floating-buy {
    left: 16px;
    right: 16px;
    width: auto;
    justify-content: center;
  }

  .pdf-viewer-outer {
    margin-top: 2rem;
    border-radius: 10px;
  }

  .pdf-viewer-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .pdf-pagination,
  .pdf-action {
    justify-content: center;
  }

  .pdf-download-link {
    justify-content: center;
  }
}