/* 列表页筛选条 */
.lib-hero { padding-top: 42px; }
.lib-filter { display: grid; gap: 14px; margin-bottom: 26px; }
.lib-tabs {
  display: inline-flex;
  gap: 6px;
  width: fit-content;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.04);
}
.lib-tab {
  min-height: 34px;
  padding: 0 16px;
  border: 0;
  border-radius: var(--r-pill);
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  transition: color 0.2s, background 0.2s;
}
.lib-tab.is-active { color: #071014; background: linear-gradient(135deg, var(--cyan), var(--teal)); }
.lib-dirs { display: flex; flex-wrap: wrap; gap: 8px; }
.lib-dir {
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.lib-dir:hover { color: var(--text-soft); }
.lib-dir.is-active { color: var(--cyan); border-color: rgba(94, 224, 255, 0.4); background: rgba(94, 224, 255, 0.08); }
.lib-search {
  height: 42px;
  max-width: 320px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--text);
  outline: none;
  background: rgba(255, 255, 255, 0.05);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.lib-search:focus { border-color: rgba(94, 224, 255, 0.6); box-shadow: 0 0 0 3px rgba(94, 224, 255, 0.12); }

/* 卡片网格 */
.lib-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.lib-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  color: inherit;
  text-decoration: none;
  background: var(--panel);
  transition: transform 0.24s var(--ease-out), border-color 0.24s var(--ease-out), box-shadow 0.24s var(--ease-out);
}
.lib-card:hover { transform: translateY(-4px); border-color: rgba(94, 224, 255, 0.34); box-shadow: var(--shadow-card), var(--glow-cyan); }
.lib-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid;
  place-content: center;
  padding: 20px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  /* 无封面时的品牌渐变底(默认青) */
  background-image:
    radial-gradient(circle at 28% 22%, rgba(94, 224, 255, 0.28), transparent 62%),
    linear-gradient(160deg, #10202b, #0b1016);
}
.lib-dir-video.lib-cover { background-image: radial-gradient(circle at 28% 22%, rgba(52, 214, 184, 0.28), transparent 62%), linear-gradient(160deg, #0e211f, #0b1015); }
.lib-dir-ecom.lib-cover { background-image: radial-gradient(circle at 28% 22%, rgba(255, 210, 122, 0.26), transparent 62%), linear-gradient(160deg, #221c10, #0e0c08); }
.lib-dir-private.lib-cover { background-image: radial-gradient(circle at 28% 22%, rgba(255, 111, 97, 0.24), transparent 62%), linear-gradient(160deg, #241514, #0f0b0b); }
.lib-dir-game.lib-cover { background-image: radial-gradient(circle at 28% 22%, rgba(244, 182, 63, 0.26), transparent 62%), linear-gradient(160deg, #201a10, #0d0b08); }
.lib-dir-finance.lib-cover { background-image: radial-gradient(circle at 28% 22%, rgba(52, 214, 184, 0.26), transparent 62%), linear-gradient(160deg, #0d1c24, #0a0f14); }
.lib-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.28));
  pointer-events: none;
}
.lib-cover-title {
  position: relative;
  z-index: 1;
  max-width: 90%;
  color: rgba(255, 255, 255, 0.94);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
}
.lib-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 700;
}
.lib-badge-course { color: #071014; background: linear-gradient(135deg, var(--cyan), var(--teal)); }
.lib-badge-project { color: #071014; background: linear-gradient(135deg, var(--gold), var(--gold-deep)); }
.lib-card-body { display: grid; gap: 10px; flex: 1; align-content: start; padding: 18px; }
.lib-card-body h3 {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lib-card-body > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lib-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.lib-chips span {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--muted);
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
}
.lib-card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 6px; }
.lib-card-meta span { color: var(--muted-2); font-family: "JetBrains Mono", Consolas, monospace; font-size: 12px; }
.lib-card-meta em { color: var(--cyan); font-style: normal; font-weight: 700; font-size: 13px; }
.lib-empty { padding: 40px 0; text-align: center; color: var(--muted); }

/* 详情页 */
.lib-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  color: var(--muted);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 13px;
  transition: color 0.2s;
}
.lib-breadcrumb:hover { color: var(--cyan); }
.lib-detail-hero h1 { margin-bottom: 16px; font-size: clamp(30px, 3.4vw, 46px); }
.lib-detail-sub { max-width: 760px; margin-bottom: 18px; color: var(--text-soft); font-size: 17px; line-height: 1.8; }

.lib-watch { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 0.4fr); gap: 24px; align-items: start; }
.lib-player {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #0a0e12;
}
.lib-player iframe, .lib-player video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lib-player-ph {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 8px;
  background: radial-gradient(circle at 50% 42%, rgba(94, 224, 255, 0.12), transparent 60%), #0a0e12;
}
.lib-player-ph svg { width: 54px; height: 54px; fill: var(--cyan); stroke: none; opacity: 0.9; }
.lib-player-ph span { color: var(--text); font-size: 16px; }
.lib-player-ph em { color: var(--muted); font-size: 13px; font-style: normal; }
.lib-watch-side { display: grid; gap: 14px; align-content: start; }
.lib-watch-meta { display: grid; gap: 10px; padding: 16px; border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--panel); }
.lib-watch-meta div { display: flex; align-items: center; justify-content: space-between; }
.lib-watch-meta span { color: var(--muted); font-size: 13px; }
.lib-watch-meta strong { color: var(--text); }
.lib-watch-side .button { width: 100%; }

.lib-outline { display: grid; gap: 14px; }
.lib-chapter { position: relative; padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--panel); }
.lib-chapter-idx { color: var(--cyan); font-family: "JetBrains Mono", Consolas, monospace; font-weight: 700; font-size: 13px; }
.lib-chapter h3 { margin: 6px 0 12px; color: var(--text); font-size: 18px; }
.lib-chapter ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.lib-chapter li { position: relative; padding-left: 22px; color: var(--text-soft); line-height: 1.7; }
.lib-chapter li::before { content: ""; position: absolute; left: 3px; top: 0.62em; width: 9px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--cyan), var(--teal)); }

.lib-resources { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.lib-resource {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text-soft);
  text-decoration: none;
  background: var(--panel);
  transition: transform 0.2s, border-color 0.2s;
}
.lib-resource:hover { transform: translateY(-2px); border-color: rgba(94, 224, 255, 0.34); }
.lib-resource em { color: var(--cyan); font-style: normal; font-weight: 700; }

@media (max-width: 980px) {
  .lib-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lib-watch { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .community-heading-side { grid-column: auto; }
}
@media (max-width: 620px) {
  .lib-grid, .lib-resources { grid-template-columns: 1fr; }
}