/* 话题词汇分类样式 */
.tv-toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.tv-chip {
  padding: 7px 14px; font-size: 13px; border: 1px solid #d7dbe0; background: #fff;
  border-radius: 999px; cursor: pointer; transition: all .15s; color: #374151;
}
.tv-chip:hover { border-color: #4c8bf5; color: #2563eb; }
.tv-chip.active { background: #4c8bf5; border-color: #4c8bf5; color: #fff; }

.tv-desc { font-size: 13px; color: #6b7280; margin: 6px 0 14px; padding: 10px 14px; background: #f8faff; border-radius: 10px; border-left: 4px solid #4c8bf5; }

.tv-group { margin-bottom: 22px; }
.tv-group-title { font-size: 15px; font-weight: 600; color: #1f2937; margin: 0 0 10px; padding-left: 10px; border-left: 3px solid #4c8bf5; }

.tv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 720px) { .tv-grid { grid-template-columns: 1fr; } }

.tv-card { padding: 14px 16px; background: #fff; border: 1px solid #e6e8eb; border-radius: 12px; }
.tv-word { font-size: 16px; font-weight: 600; color: #1f2937; }
.tv-cn { font-size: 13px; color: #6b7280; margin-left: 8px; font-weight: 400; }
.tv-cols { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.tv-col { font-size: 12px; color: #087f5b; background: #e6fcf5; padding: 3px 9px; border-radius: 6px; cursor: pointer; transition: background .15s; }
.tv-col:hover { background: #c3fae8; }

.tv-phrases { margin-top: 16px; padding: 14px 16px; background: #fffbeb; border: 1px solid #fde68a; border-radius: 12px; }
.tv-phrases-title { font-size: 13px; font-weight: 600; color: #92400e; margin-bottom: 8px; }
.tv-phrase { display: inline-block; font-size: 13px; color: #b45309; background: #fff; padding: 5px 11px; border-radius: 8px; margin: 4px 6px 0 0; cursor: pointer; transition: all .15s; border: 1px solid #fde68a; }
.tv-phrase:hover { background: #fef3c7; }