/**
 * 员工端课程学习总览：主区内筛选树 + 卡片墙
 * 仅本页引用，不改课程详情 / 1368 页布局。
 */
.learn-head {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid #e4e7ed;
}
.learn-head h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 650;
  color: #303133;
}
.learn-crumb {
  font-size: 12px;
  color: #909399;
  padding: 10px 20px 0;
}
.learn-work {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 20px 28px;
  min-width: 0;
}
.learn-filter {
  width: 220px;
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 10px 0 12px;
}
.learn-filter__search {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 12px 10px;
  font-size: 12px;
  color: #606266;
  border-bottom: 1px solid #ebeef5;
}
.learn-filter__search input {
  width: 100%;
  height: 32px;
  padding: 0 8px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font: inherit;
  box-sizing: border-box;
}
.learn-board {
  flex: 1;
  min-width: 0;
}
.learn-tree {
  padding: 0;
}
.learn-tree__root {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 14px;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  color: #303133;
  cursor: pointer;
  text-align: left;
}
.learn-tree__root:hover {
  background: #f5f7fa;
}
.learn-tree__chev {
  font-size: 10px;
  color: #909399;
}
.learn-tree__body {
  padding: 0 0 6px;
}
.learn-tree__item,
.learn-tree__cert > .learn-tree__item {
  display: block;
  width: 100%;
  padding: 6px 12px 6px 18px;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 13px;
  color: #606266;
  cursor: pointer;
  text-align: left;
  border-left: 3px solid transparent;
}
.learn-tree__item:hover {
  color: #409eff;
  background: #ecf5ff;
}
.learn-tree__item.is-active {
  color: #409eff;
  font-weight: 600;
  background: #ecf5ff;
  border-left-color: #409eff;
}
.learn-tree__stars {
  padding: 0 0 4px;
}
.learn-tree__stars .learn-tree__item {
  padding-left: 32px;
  font-size: 12px;
}
.learn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 16px 14px;
}
.learn-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  text-decoration: none;
  color: var(--text-primary);
  min-width: 0;
}
.learn-card:hover {
  border-color: #c6e2ff;
  box-shadow: var(--shadow-md);
}
.learn-card__thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, #93c5fd 0%, #1d4ed8 100%);
}
.learn-card__thumb.t2 { background: linear-gradient(145deg, #fda4af, #e11d48); }
.learn-card__thumb.t3 { background: linear-gradient(145deg, #86efac, #047857); }
.learn-card__thumb.t4 { background: linear-gradient(145deg, #fcd34d, #d97706); }
.learn-card__thumb.t5 { background: linear-gradient(145deg, #c4b5fd, #6d28d9); }
.learn-card__thumb.t6 { background: linear-gradient(145deg, #67e8f9, #0e7490); }
.learn-card__body {
  padding: 8px 10px 12px;
}
.learn-card__title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.learn-card__meta {
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-muted);
}
.learn-empty {
  padding: 48px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  background: #fff;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
}
.learn-note {
  margin-top: 16px;
}
@media (max-width: 960px) {
  .learn-work {
    flex-direction: column;
  }
  .learn-filter {
    width: 100%;
  }
}