:root {
  --bg: #f4ebdf;
  --bg-deep: #e2cfba;
  --panel: rgba(249, 242, 233, 0.86);
  --panel-strong: rgba(253, 248, 240, 0.96);
  --text: #2f2a36;
  --muted: #6e6574;
  --accent: #d3a74f;
  --accent-dark: #8d5f2f;
  --accent-soft: #e4c36e;
  --line: rgba(47, 42, 54, 0.1);
  --shadow: 0 24px 60px rgba(47, 42, 54, 0.14);
  --shadow-soft: 0 12px 30px rgba(47, 42, 54, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft JhengHei", "Noto Serif TC", serif;
  background:
    radial-gradient(circle at top left, rgba(154, 117, 86, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(67, 81, 130, 0.24), transparent 24%),
    linear-gradient(180deg, #faf4ea 0%, var(--bg) 42%, var(--bg-deep) 100%);
}

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

.hero,
.section,
.footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 24px;
  padding: 56px 0 30px;
}

.hero__content,
.hero__card,
.store-card,
.book-card,
.quote-card,
.status-bar {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}

.hero__content {
  position: relative;
  overflow: hidden;
  padding: 40px;
  background:
    linear-gradient(135deg, rgba(252, 248, 241, 0.94), rgba(242, 231, 217, 0.92)),
    var(--panel);
}

.hero__content::after {
  content: "";
  position: absolute;
  inset: auto -70px -80px auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(211, 167, 79, 0.18), transparent 68%);
  pointer-events: none;
}

.hero__badge,
.store-card__tag,
.book-card__shop {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(211, 167, 79, 0.12);
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(2.4rem, 4.5vw, 4.8rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
}

.hero__text,
.section__head p,
.hero__card p,
.store-card p,
.book-card p,
.quote-card p,
.footer p,
.status-bar {
  color: var(--muted);
  line-height: 1.85;
}

.hero__text {
  max-width: 54ch;
  font-size: 1.05rem;
}

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

.btn {
  padding: 13px 20px;
  border-radius: 16px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover,
.filter-btn:hover,
.store-card:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 10px 20px rgba(211, 167, 79, 0.2);
}

.btn--ghost {
  border: 1px solid var(--line);
  background: rgba(248, 239, 228, 0.72);
}

.hero__card {
  padding: 30px;
  align-self: end;
  background:
    linear-gradient(180deg, rgba(250, 245, 238, 0.96), rgba(236, 226, 211, 0.92));
}

.hero__card h2,
.section__head h2,
.quote-card h2,
.store-card h3,
.book-card h3 {
  margin-top: 0;
}

.hero__card ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.section {
  padding: 26px 0;
}

.section__head {
  margin-bottom: 18px;
}

.section__head h2 {
  font-size: 2rem;
  letter-spacing: 0.02em;
}

.store-grid,
.book-grid,
.section--split {
  display: grid;
  gap: 18px;
}

.store-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.store-card,
.book-card,
.quote-card {
  padding: 24px;
}

.store-card {
  display: block;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background:
    linear-gradient(180deg, rgba(250, 245, 238, 0.95), rgba(242, 233, 220, 0.92));
}

.store-card::before {
  content: "";
  position: absolute;
  inset: 18px auto auto 18px;
  width: 70px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(211, 167, 79, 0.55), rgba(211, 167, 79, 0.05));
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 16px;
}

.filter-btn {
  border: 1px solid var(--line);
  background: rgba(250, 245, 238, 0.8);
  color: var(--text);
  padding: 11px 16px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  box-shadow: var(--shadow-soft);
}

.filter-btn.is-active {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  color: #fdf7ef;
  border-color: transparent;
}

.status-bar {
  padding: 14px 18px;
  border-radius: 18px;
  background: rgba(251, 246, 236, 0.74);
  border: 1px dashed rgba(52, 40, 31, 0.14);
  margin-bottom: 18px;
}

.book-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.book-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  min-height: 240px;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(251, 246, 238, 0.96), rgba(239, 228, 214, 0.92));
}

.book-card::after {
  content: "";
  position: absolute;
  inset: auto -20px -20px auto;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(211, 167, 79, 0.1), transparent 68%);
  pointer-events: none;
}

.book-card.is-hidden {
  display: none;
}

.book-card__cover {
  width: 120px;
  height: 178px;
  border-radius: 18px;
  object-fit: cover;
  background: #eee;
  border: 1px solid rgba(52, 40, 31, 0.1);
  box-shadow: 0 10px 25px rgba(70, 49, 32, 0.16);
}

.book-card__meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.book-card__rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-width: 48px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(154, 117, 86, 0.12);
  color: var(--accent-dark);
  font-weight: 700;
}

.book-card__link {
  display: inline-block;
  color: var(--accent-dark);
  font-weight: 700;
}

.book-card__link + .book-card__link {
  margin-top: 4px;
}

.book-card__link--library {
  display: inline-flex;
  width: fit-content;
  margin-top: 2px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(211, 167, 79, 0.14);
  color: var(--accent-dark);
  border: 1px solid rgba(211, 167, 79, 0.22);
  box-shadow: var(--shadow-soft);
}

.section--split {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-bottom: 42px;
}

.reader-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(251, 246, 238, 0.98), rgba(239, 228, 214, 0.94));
  box-shadow: var(--shadow);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field__label {
  font-weight: 700;
  color: var(--accent-dark);
  letter-spacing: 0.02em;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid rgba(47, 42, 54, 0.14);
  border-radius: 18px;
  padding: 14px 16px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 251, 245, 0.96);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(110, 101, 116, 0.8);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid rgba(211, 167, 79, 0.35);
  border-color: rgba(211, 167, 79, 0.45);
}

.reader-form__actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.quote-card {
  background: linear-gradient(180deg, rgba(251, 246, 238, 0.96), rgba(235, 223, 208, 0.92));
}

.quote-card--accent {
  background: linear-gradient(135deg, rgba(211, 167, 79, 0.16), rgba(251, 246, 238, 0.96));
}

.feature-banner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto 10px;
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #1e2744;
}

.feature-banner__image {
  display: block;
  width: 100%;
  height: auto;
}

.footer {
  padding: 0 0 32px;
  text-align: center;
}

@media (max-width: 860px) {
  .hero,
  .store-grid,
  .book-grid,
  .section--split,
  .reader-form {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 28px;
  }

  .book-card {
    grid-template-columns: 108px 1fr;
  }

  .book-card__cover {
    width: 108px;
    height: 160px;
  }
}

@media (max-width: 640px) {
  .hero__content,
  .hero__card,
  .store-card,
  .book-card,
  .quote-card {
    padding: 20px;
    border-radius: 22px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .book-card {
    grid-template-columns: 1fr;
  }

  .book-card__cover {
    width: 100%;
    height: 250px;
  }

  .reader-form {
    padding: 20px;
  }

}