.book2-page {
  min-height: 100vh;
  padding: 24px clamp(16px, 4vw, 56px) 28px;
}
.book2-header,
.book2-intro,
.book2-footer {
  max-width: 1400px;
  margin: 0 auto;
}
.book2-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.back-link,
.bilibili-link {
  font-size: 14px;
  text-decoration: none;
  padding: 8px 0;
}
.book2-intro {
  padding: 28px 0 32px;
}
.book2-intro h1 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.4;
  font-weight: 700;
}
.intro-subtitle {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin-top: 8px;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.section-heading h2 {
  font-size: 20px;
}
.section-status {
  color: var(--muted);
  font-size: 13px;
}
.status-dot {
  display: none;
}
.episode-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.episode-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-bg);
  overflow: hidden;
  transition:
    background 0.18s,
    border-color 0.18s;
}
.episode-card:not(.is-coming) {
  cursor: pointer;
}
.episode-card:not(.is-coming):is(:hover, :focus-visible) {
  border-color: var(--accent);
  background: var(--panel-hover);
}
.episode-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--panel-bg);
}
.episode-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.episode-label {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 7px;
  border-radius: 5px;
  background: #091523de;
  color: #d5e9fa;
  font-size: 11px;
}
.episode-play {
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #091523cc;
}
.episode-play::after {
  content: "";
  border-left: 9px solid white;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  margin-left: 2px;
}
.coming-label {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 4px 8px;
  border-radius: 5px;
  background: #091523e6;
  font-size: 12px;
  line-height: 1.5;
  color: #edf3fa;
}
.episode-body {
  padding: 14px;
}
.episode-body h3 {
  font-size: 16px;
  line-height: 1.5;
}
.episode-body p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  margin-top: 5px;
}
.is-coming .episode-body h3 {
  color: var(--muted);
}
.book2-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin-top: 32px;
  font-size: 12px;
  color: var(--muted);
}
.video-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  padding: 16px;
  display: grid;
  place-items: center;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: #030912d9;
}
.modal-panel {
  position: relative;
  width: min(920px, 100%);
  max-height: calc(100dvh - 32px);
  overflow: auto;
  background: var(--panel-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.btn-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
}
.modal-player {
  aspect-ratio: 16/9;
  background: #000;
}
#video-player,
#video-player iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
.modal-info {
  padding: 16px 20px;
}
.modal-info h2 {
  font-size: 18px;
}
.modal-info p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 6px;
}
#bilibili-fallback {
  display: inline-block;
  font-size: 14px;
  margin-top: 12px;
}
@media (max-width: 1150px) {
  .episode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 560px) {
  .book2-page {
    padding: 12px 16px 24px;
  }
  .book2-intro {
    padding: 18px 0 22px;
  }
  .episode-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .book2-footer {
    flex-direction: column;
    gap: 6px;
  }
}

.is-coming .episode-body p { visibility: hidden; }