html body {
  background: #f4f8ff !important;
}
html body .containers .header {
  background: rgba(255, 255, 255, 0.92) !important;
  backdrop-filter: blur(12px);
}
html body .containers .main {
  background: radial-gradient(circle at 12% 0%, rgba(96, 165, 250, 0.28), transparent 30%), linear-gradient(180deg, #f4f8ff 0%, #f7fbff 46%, #ffffff 100%);
}
html body .containers .main .article-container {
  max-width: 920px;
  margin: 0 auto;
}
.lecture-detail-page {
  --lecture-primary: #2563eb;
  --lecture-primary-dark: #1d4ed8;
  --lecture-primary-soft: #eaf2ff;
  --lecture-text: #0f172a;
  --lecture-muted: #64748b;
  --lecture-border: #e5edf7;
  --lecture-surface: rgba(255, 255, 255, 0.94);
  --lecture-radius-lg: 22px;
  --lecture-radius-md: 16px;
  --lecture-shadow: 0 18px 44px rgba(15, 23, 42, 0.1);
  min-height: calc(100vh - 56px);
  padding: 14px 12px calc(92px + env(safe-area-inset-bottom));
  color: var(--lecture-text);
}
.lecture-detail-page .article-container {
  max-width: 920px;
  margin: 0 auto;
  width: 100%;
}
.lecture-detail-page .lecture-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(226, 237, 250, 0.94);
  border-radius: var(--lecture-radius-lg);
  background: var(--lecture-surface);
  box-shadow: var(--lecture-shadow);
  backdrop-filter: blur(14px);
}
.lecture-detail-page .lecture-panel:after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78);
}
.lecture-detail-page .lecture-panel + .lecture-panel {
  margin-top: 14px;
}
.lecture-detail-page .lecture-header {
  padding: 22px 20px 18px;
  background: radial-gradient(circle at 88% 4%, rgba(255, 255, 255, 0.34), transparent 24%), linear-gradient(135deg, rgba(37, 99, 235, 0.96), rgba(56, 189, 248, 0.88));
  color: #fff;
}
.lecture-detail-page .lecture-header:before {
  content: '';
  position: absolute;
  right: -44px;
  bottom: -54px;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
}
.lecture-detail-page .lecture-kicker {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.lecture-detail-page .lecture-kicker span,
.lecture-detail-page .lecture-kicker em {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.94);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lecture-detail-page .lecture-kicker em {
  background: rgba(255, 255, 255, 0.12);
  letter-spacing: 0.04em;
  text-transform: none;
}
.lecture-detail-page .content-title {
  position: relative;
  z-index: 1;
  margin: 0 0 18px;
  color: #fff;
  font-size: 29px;
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: 0.2px;
  word-break: break-word;
  text-shadow: 0 8px 18px rgba(15, 23, 42, 0.18);
}
.lecture-detail-page .lecture-quick-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.lecture-detail-page .lecture-quick-meta__item {
  min-width: 0;
  padding: 12px 13px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
}
.lecture-detail-page .lecture-quick-meta__item span {
  display: block;
  margin-bottom: 5px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 12px;
  font-weight: 700;
}
.lecture-detail-page .lecture-quick-meta__item strong {
  display: -webkit-box;
  overflow: hidden;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.lecture-detail-page .lecture-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.lecture-detail-page .lecture-meta-item {
  display: grid;
  grid-template-columns: 30px auto minmax(0, 1fr);
  align-items: flex-start;
  gap: 8px;
  min-width: 0;
  padding: 12px;
  border: 1px solid #e5eefb;
  border-radius: var(--lecture-radius-md);
  background: linear-gradient(180deg, #f8fbff 0%, #f6faff 100%);
  color: #334155;
  line-height: 1.6;
}
.lecture-detail-page .lecture-meta-item .lecture-meta-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: var(--lecture-primary-soft);
  color: var(--lecture-primary-dark);
  font-size: 13px;
  font-style: normal;
  font-weight: 900;
}
.lecture-detail-page .lecture-meta-item .label {
  color: #475569;
  font-weight: 800;
  font-size: 14px;
  white-space: nowrap;
  text-align: left;
  padding: 0;
}
.lecture-detail-page .lecture-meta-item .value {
  min-width: 0;
  color: var(--lecture-text);
  font-size: 14px;
  font-weight: 600;
  word-break: break-word;
}
.lecture-detail-page .lecture-meta-item .value:empty:before {
  content: '暂无';
  color: #94a3b8;
  font-weight: 500;
}
.lecture-detail-page .lecture-meta-item.is-wide {
  grid-column: 1 / -1;
}
.lecture-detail-page .lecture-meta-item.is-highlight {
  border-color: #d9e5ff;
  background: linear-gradient(180deg, #eef4ff 0%, #eaf1ff 100%);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.08);
}
.lecture-detail-page .lecture-source,
.lecture-detail-page .lecture-speaker,
.lecture-detail-page .lecture-tip-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--lecture-primary-soft);
  color: var(--lecture-primary-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.45;
}
.lecture-detail-page .lecture-source {
  background: #ecfdf5;
  color: #0f766e;
}
.lecture-detail-page .lecture-tip {
  position: relative;
  z-index: 1;
  margin-top: 12px;
}
.lecture-detail-page .lecture-tip-badge {
  padding: 7px 11px;
  background: rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 700;
}
.lecture-detail-page .lecture-content {
  padding: 24px 22px 28px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--lecture-text);
}
.lecture-detail-page .lecture-section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid #eef4fb;
}
.lecture-detail-page .lecture-section-heading span {
  color: #94a3b8;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.lecture-detail-page .lecture-content-title {
  margin: 0;
  color: var(--lecture-text);
  font-size: 20px;
  line-height: 1.25;
  font-weight: 900;
}
.lecture-detail-page .lecture-content > * {
  max-width: 100%;
}
.lecture-detail-page .lecture-content p {
  margin: 0 0 1em;
}
.lecture-detail-page .lecture-content h1,
.lecture-detail-page .lecture-content h2,
.lecture-detail-page .lecture-content h3,
.lecture-detail-page .lecture-content h4 {
  margin: 0 0 0.7em;
  line-height: 1.35;
  color: var(--lecture-text);
  font-weight: 900;
}
.lecture-detail-page .lecture-content h1 {
  font-size: 24px;
}
.lecture-detail-page .lecture-content h2 {
  font-size: 21px;
}
.lecture-detail-page .lecture-content h3 {
  font-size: 18px;
}
.lecture-detail-page .lecture-content h4 {
  font-size: 16px;
}
.lecture-detail-page .lecture-content ul,
.lecture-detail-page .lecture-content ol {
  padding-left: 1.25em;
  margin: 0 0 1em;
}
.lecture-detail-page .lecture-content li {
  margin: 0.35em 0;
}
.lecture-detail-page .lecture-content blockquote {
  margin: 1em 0;
  padding: 13px 16px;
  border-left: 4px solid var(--lecture-primary);
  border-radius: 0 14px 14px 0;
  background: #f8fbff;
  color: #475569;
}
.lecture-detail-page .lecture-content a {
  color: var(--lecture-primary);
  text-decoration: none;
  font-weight: 800;
}
.lecture-detail-page .lecture-content img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  margin: 8px 0 16px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.1);
}
.lecture-detail-page .lecture-content table {
  display: block;
  width: 100%;
  margin: 1em 0;
  border-collapse: collapse;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.lecture-detail-page .lecture-content th,
.lecture-detail-page .lecture-content td {
  padding: 10px 12px;
  border: 1px solid #e2e8f0;
  vertical-align: top;
}
.lecture-detail-page .lecture-content th {
  background: #f8fafc;
  font-weight: 800;
}
.lecture-detail-page .lecture-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  max-width: 920px;
  margin: 0 auto;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  border: 1px solid rgba(226, 237, 250, 0.94);
  border-bottom: 0;
  border-radius: 20px 20px 0 0;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 -12px 30px rgba(15, 23, 42, 0.1);
  backdrop-filter: blur(16px);
}
.lecture-detail-page .lecture-footer .btn {
  position: relative;
  width: 100%;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 900;
  line-height: 48px;
  text-align: center;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.18);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, opacity 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}
.lecture-detail-page .lecture-footer .btn:active {
  transform: scale(0.98);
}
.lecture-detail-page .lecture-footer .btn:focus,
.lecture-detail-page .lecture-footer .btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18), 0 10px 22px rgba(37, 99, 235, 0.2);
}
.lecture-detail-page .lecture-footer .btn-primary {
  background: linear-gradient(180deg, #5b8ef7 0%, var(--lecture-primary) 100%);
  border-color: var(--lecture-primary);
  color: #fff;
}
.lecture-detail-page .lecture-footer .btn-primary.btn-secondary {
  background: #fff;
  color: var(--lecture-primary);
  border-color: #cfe0ff;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.08);
}
.lecture-detail-page .lecture-footer .btn + .btn {
  margin-left: 0;
}
.lecture-detail-page .btn-disabled {
  opacity: 0.76;
  cursor: not-allowed;
  box-shadow: none !important;
  transform: none !important;
  filter: grayscale(0.08);
}
.lecture-detail-page .shield {
  width: 16px;
  height: 16px;
  object-fit: cover;
  border-radius: 50%;
}
@media (min-width: 769px) {
  .lecture-detail-page {
    padding-left: 18px;
    padding-right: 18px;
  }
  .lecture-detail-page .lecture-footer {
    left: 50%;
    right: auto;
    width: 920px;
    transform: translateX(-50%);
  }
}
@media (max-width: 768px) {
  .lecture-detail-page {
    padding: 12px 8px calc(88px + env(safe-area-inset-bottom));
  }
  .lecture-detail-page .lecture-header {
    padding: 20px 16px 16px;
    border-radius: 18px;
  }
  .lecture-detail-page .content-title {
    margin-bottom: 14px;
    font-size: 24px;
  }
  .lecture-detail-page .lecture-quick-meta,
  .lecture-detail-page .lecture-meta {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .lecture-detail-page .lecture-quick-meta__item {
    padding: 10px 12px;
  }
  .lecture-detail-page .lecture-meta-item {
    grid-template-columns: 28px minmax(0, 1fr);
    padding: 10px;
    gap: 6px 8px;
  }
  .lecture-detail-page .lecture-meta-item .lecture-meta-icon {
    grid-row: span 2;
    width: 28px;
    height: 28px;
  }
  .lecture-detail-page .lecture-meta-item .label {
    font-size: 13px;
    text-align: left;
    padding: 0;
  }
  .lecture-detail-page .lecture-meta-item .value {
    font-size: 14px;
  }
  .lecture-detail-page .lecture-source,
  .lecture-detail-page .lecture-speaker,
  .lecture-detail-page .lecture-tip-badge {
    white-space: normal;
  }
  .lecture-detail-page .lecture-content {
    padding: 20px 16px 24px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.82;
  }
  .lecture-detail-page .lecture-section-heading {
    align-items: flex-start;
    flex-direction: column-reverse;
    gap: 4px;
    margin-bottom: 14px;
  }
  .lecture-detail-page .lecture-content-title {
    font-size: 18px;
  }
  .lecture-detail-page .lecture-footer {
    padding-left: 12px;
    padding-right: 12px;
  }
  .lecture-detail-page .lecture-footer .btn {
    min-height: 48px;
    font-size: 15px;
    line-height: 48px;
  }
}