.topic-group {
  border: 1px solid #dbe3f1;
  border-radius: 11px;
  margin-bottom: 15px;
  overflow: hidden;
}

.topic-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  background: #f2f6ff;
  border-bottom: 1px solid #dbe3f1;
}

.topic-cover {
  width: 72px;
  height: 88px;
  object-fit: cover;
  border-radius: 8px;
  background: #e8eef9;
  flex: 0 0 auto;
}

.topic-summary {
  flex: 1;
  min-width: 0;
}

.topic-actions {
  white-space: nowrap;
  text-align: right;
}

.topic-title {
  color: #244795;
  font-size: 15px;
  font-weight: 750;
}

.topic-cover-text {
  color: #8a6d3b;
  font-size: 12px;
  margin-top: 3px;
}

.topic-meta {
  color: var(--muted);
  font-size: 12px;
  margin-top: 5px;
}

.topic-items {
  padding: 0 15px;
}

.topic-group.collapsed .topic-items {
  display: none;
}

.topic-group.collapsed .topic-head {
  border-bottom: 0;
}