/* PC 课程页 */
.page-course .pc-main {
  padding: 24px 0 48px;
}

/* 精品专栏 */
.course-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.course-featured__card {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.course-featured__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.course-featured__cover {
  width: 160px;
  height: 100px;
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
}

.course-featured__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-featured__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.course-featured__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-featured__desc {
  margin: 0 0 auto;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-featured__action {
  margin-top: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.course-featured__action:hover {
  color: var(--accent);
}

/* 工具栏 */
.course-toolbar {
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 16px 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.course-mode-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg-subtle);
  border-radius: 10px;
  margin-bottom: 16px;
}

.course-mode-tab {
  padding: 8px 24px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

a.course-mode-tab,
a.course-pill,
a.course-sort__btn,
a.course-empty__btn {
  display: inline-block;
  text-decoration: none;
  box-sizing: border-box;
}

.course-mode-tab.active {
  background: var(--bg);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.course-toolbar__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
}

.course-toolbar__label {
  font-size: 13px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.course-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.course-pill {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.course-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.course-pill.active {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent);
  font-weight: 600;
}

.course-sort {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.course-sort__btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  transition: all var(--transition);
}

.course-sort__btn:hover {
  color: var(--primary);
}

.course-sort__btn.active {
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-soft);
}

.course-sort__btn--live .course-sort__dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--live);
  margin-right: 4px;
  vertical-align: middle;
}

.course-status-tabs {
  display: none;
  align-items: center;
  gap: 8px;
}

.course-status-tabs.show {
  display: flex;
}

/* 结果 */
.course-result {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.course-result strong {
  color: var(--accent);
  font-weight: 600;
}

.course-live-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.course-live-grid[hidden],
.course-list-wrap[hidden] {
  display: none !important;
}

.course-empty {
  text-align: center;
  padding: 64px 24px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.course-empty i {
  font-size: 48px;
  color: var(--text-muted);
  opacity: 0.4;
  margin-bottom: 16px;
}

.course-empty p {
  margin: 0 0 16px;
  color: var(--text-secondary);
}

.course-empty__btn {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

.course-empty__btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.course-pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
}

.course-pager a,
.course-pager span {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.course-pager a {
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--bg);
}

.course-pager a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.course-pager .is-disabled {
  opacity: 0.45;
}

.course-pager__info {
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .course-featured {
    grid-template-columns: 1fr;
  }

  .course-live-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .course-featured__card {
    flex-direction: column;
  }

  .course-featured__cover {
    width: 100%;
    height: 140px;
  }

  .course-toolbar__row {
    flex-direction: column;
    align-items: flex-start;
  }

  .course-live-grid {
    grid-template-columns: 1fr;
  }
}