/* The library uses the original ink-paper phone; article pages retain their reading layout. */
body.learning-page.learning-library {
  background:
    linear-gradient(180deg, rgba(247, 243, 235, 0.78) 0%, rgba(237, 230, 216, 0.82) 60%, rgba(232, 224, 212, 0.86) 100%),
    url('../images/bg-ink-new.jpg?v=76') center top/cover no-repeat fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'STKaiti', 'KaiTi', 'SimSun', 'Microsoft YaHei', serif;
  font-size: 14px;
  line-height: 1.6;
}

body.learning-page.learning-library .learning-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 34px 16px 20px;
}

body.learning-page.learning-library [hidden] {
  display: none !important;
}

body.learning-page.learning-library .library-header {
  flex-wrap: nowrap;
  gap: 8px;
  padding: 7px 0 12px;
  border-bottom: 1px solid rgba(164, 142, 102, 0.35);
}

body.learning-page.learning-library .library-header h1 {
  min-width: 0;
  margin: 0;
  color: var(--primary-dark);
  font-family: 'STKaiti', 'KaiTi', 'Songti SC', 'SimSun', serif;
  font-size: 23px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 2px;
}

body.learning-page.learning-library .library-header nav {
  flex-shrink: 0;
  flex-wrap: nowrap;
  gap: 2px;
}

body.learning-page.learning-library .library-header nav a {
  min-height: 32px;
  padding: 5px 7px;
  border-radius: 5px;
  font-size: 12px;
}

body.learning-page.learning-library .library-header nav a[aria-current='page'] {
  background: rgba(45, 90, 74, 0.1);
}

body.learning-page.learning-library .library-intro {
  margin: 15px 0 25px;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.8;
}

body.learning-page.learning-library .library-bookcase {
  margin: 0 0 28px;
  scroll-margin-top: 16px;
}

body.learning-page.learning-library .bookshelf-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 18px;
}

body.learning-page.learning-library .bookshelf-heading h2 {
  margin: 0;
  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
}

body.learning-page.learning-library .bookshelf-heading > span {
  color: #86734f;
  font-size: 11px;
}

body.learning-page.learning-library .book-cover-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 13px;
}

body.learning-page.learning-library .book-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: stretch;
  color: var(--primary-dark);
  text-align: center;
  text-decoration: none;
}

body.learning-page.learning-library .book-cover {
  --cover-color: #29483e;
  display: block;
  position: relative;
  width: 100%;
  height: 166px;
  overflow: hidden;
  border: 1px solid rgba(111, 94, 54, 0.6);
  border-radius: 2px 5px 5px 2px;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.3), transparent 8%, rgba(244, 235, 203, 0.06) 11%, transparent 17%),
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(248, 241, 221, 0.025) 2px 3px),
    var(--cover-color);
  box-shadow: 2px 4px 7px rgba(46, 40, 26, 0.18), inset -2px 0 0 rgba(255, 243, 211, 0.1);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

body.learning-page.learning-library .book-cover-2 {
  --cover-color: #566a68;
}

body.learning-page.learning-library .book-cover-3 {
  --cover-color: #635142;
}

body.learning-page.learning-library .book-cover-frame {
  position: absolute;
  inset: 10px 9px 10px 16px;
  border: 1px solid rgba(216, 187, 117, 0.7);
}

body.learning-page.learning-library .book-cover-binding {
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 3px;
  width: 9px;
  background: repeating-linear-gradient(to bottom, transparent 0 15px, rgba(224, 206, 155, 0.76) 15px 17px, transparent 17px 28px);
}

body.learning-page.learning-library .book-cover-binding::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 3px;
  width: 1px;
  background: rgba(216, 187, 117, 0.55);
}

body.learning-page.learning-library .book-cover-title {
  position: absolute;
  top: 18px;
  right: 18px;
  color: #efdaa5;
  font-family: 'STKaiti', 'KaiTi', 'Songti SC', 'SimSun', serif;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 2px;
  white-space: nowrap;
  writing-mode: vertical-rl;
  text-orientation: upright;
}

body.learning-page.learning-library .book-cover-seal {
  position: absolute;
  right: 48px;
  bottom: 15px;
  padding: 3px 2px;
  border: 1px solid rgba(218, 186, 114, 0.58);
  color: #d9bc7b;
  font-family: 'STKaiti', 'KaiTi', serif;
  font-size: 10px;
  line-height: 1.2;
  writing-mode: vertical-rl;
  letter-spacing: 1px;
}

body.learning-page.learning-library .book-card-name {
  flex: 1;
  margin-top: 11px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

body.learning-page.learning-library .book-card-count {
  margin-top: 4px;
  color: #86734f;
  font-size: 11px;
  line-height: 1.5;
}

body.learning-page.learning-library .book-card:hover .book-cover {
  transform: translateY(-2px);
  box-shadow: 2px 6px 10px rgba(46, 40, 26, 0.22);
}

body.learning-page.learning-library .learning-books {
  gap: 16px;
  margin: 12px 0 22px;
}

body.learning-page.learning-library .bookcase-return {
  display: inline-flex;
  width: fit-content;
  min-height: 36px;
  align-items: center;
  gap: 5px;
  padding: 4px 1px;
  font-size: 13px;
  text-decoration: none;
}

body.learning-page.learning-library .bookcase-return > span {
  font-size: 23px;
  line-height: 1;
}

body.learning-page.learning-library .learning-book {
  padding: 16px 14px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: rgba(250, 247, 242, 0.88);
  box-shadow: var(--shadow);
  scroll-margin-top: 16px;
}

body.learning-page.learning-library .book-directory-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

body.learning-page.learning-library .learning-book h2 {
  min-width: 0;
  margin: 0 0 9px;
  color: var(--primary-dark);
  font-family: 'STKaiti', 'KaiTi', 'Songti SC', 'SimSun', serif;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
}

body.learning-page.learning-library .book-directory-count {
  flex-shrink: 0;
  padding-top: 4px;
  color: #86734f;
  font-size: 11px;
  white-space: nowrap;
}

body.learning-page.learning-library .learning-book > header > p {
  margin: 0 0 7px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.75;
}

body.learning-page.learning-library .lesson-list {
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

body.learning-page.learning-library .lesson-link {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(164, 142, 102, 0.24);
}

body.learning-page.learning-library .lesson-list li:last-child .lesson-link {
  border-bottom: 0;
  padding-bottom: 2px;
}

body.learning-page.learning-library .lesson-number {
  flex-shrink: 0;
  width: 18px;
  color: #93805a;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

body.learning-page.learning-library .lesson-copy {
  flex: 1;
  min-width: 0;
}

body.learning-page.learning-library .lesson-link h3 {
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

body.learning-page.learning-library .lesson-link p {
  margin: 5px 0 0;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
}

body.learning-page.learning-library .lesson-arrow {
  flex-shrink: 0;
  color: #93805a;
  font-size: 20px;
}

body.learning-page.learning-library .reading-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px 12px;
  margin-top: 20px;
  padding: 14px 0 0;
  border-top: 1px solid rgba(164, 142, 102, 0.3);
  font-size: 11px;
  line-height: 1.65;
}

body.learning-page.learning-library:lang(en) .library-header h1 {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 17px;
  letter-spacing: 0;
}

body.learning-page.learning-library:lang(en) .book-card-name {
  font-size: 11px;
  line-height: 1.5;
}

body.learning-page.learning-library:lang(en) .learning-book h2 {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 18px;
}

@media (max-width: 430px) {
  body.learning-page.learning-library .learning-shell {
    padding-top: 16px;
  }
}

@media (max-width: 350px) {
  body.learning-page.learning-library .book-cover-grid {
    gap: 10px;
  }

  body.learning-page.learning-library .book-cover {
    height: 150px;
  }

  body.learning-page.learning-library .book-cover-title {
    right: 16px;
    font-size: 17px;
  }

  body.learning-page.learning-library .book-cover-seal {
    right: 43px;
  }

  body.learning-page.learning-library:lang(en) .library-header {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.learning-page.learning-library .book-cover {
    transition: none;
  }
}