/* 科目切换保持导航可用，只显示当前学科。 */
.teacher-subject-section[hidden] {
  display: none !important;
}
.teacher-subject-nav {
  position: sticky;
  top: var(--teacher-tabs-top, 80px);
  z-index: 30;
}
.teacher-subject-nav a:focus-visible {
  outline: 2px solid #e60012;
  outline-offset: -5px;
}

/* 首页沿用列表按钮定位：桌面悬浮显示，手机在照片底部常显。 */
.teacher-photo > .teacher-home-style {
  margin: 0;
  border: 0;
  background: #e60012;
  color: #fff;
  border-radius: 6px;
  padding: 12px 24px;
  font-size: 16px;
  line-height: 1.5;
}
.teacher-grid article:hover .teacher-style-button,
.teacher-grid article:focus-within .teacher-style-button {
  opacity: 1;
}

/* 首页、列表都预留三行简介，长文省略；不修改后台原文。 */
body .teacher-grid article > p,
.teacher-short-intro {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
  line-height: 1.85;
  height: 5.55em;
  min-height: 5.55em;
  max-height: 5.55em;
}
body .teacher-grid article > h3,
body .teacher-grid article > b {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.5;
  height: 1.5em;
}
@media (max-width: 767px) {
  .teacher-photo > .teacher-home-style {
    padding: 7px 13px;
    font-size: 13px;
  }
  body .teacher-grid article > p,
  .teacher-short-intro {
    font-size: 13px;
  }
}