/* ==================================================================
 * TeachAny · 情境感知气泡（v7.7.4）
 * 在 AI 学伴 FAB 旁边弹出的"当前段落学习提示"小气泡
 * —— 辅助 ai-tutor.js，当学生滚动到某段时，左下角会浮出 1 行小 tip
 * ================================================================== */

.teachany-section-hint {
  position: fixed;
  left: 88px; /* ai-tutor FAB 是 24 + 56 + 8 */
  bottom: 34px;
  z-index: 9994;
  max-width: 280px;
  background: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
  color: #ffffff;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.55;
  box-shadow: 0 12px 28px rgba(124, 58, 237, 0.38);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.teachany-section-hint.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.teachany-section-hint::before {
  content: "💡";
  margin-right: 6px;
}

.teachany-section-hint .tsh-close {
  position: absolute;
  top: 2px;
  right: 6px;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
}

.teachany-section-hint .tsh-close:hover {
  color: #ffffff;
}

/* 当底部音频条在时整体上移 */
body.tap-bar-on .teachany-section-hint,
body.audio-playing .teachany-section-hint {
  bottom: 114px;
}

@media (max-width: 640px) {
  .teachany-section-hint {
    left: 12px;
    right: 12px;
    max-width: none;
    bottom: 92px;
  }
  body.tap-bar-on .teachany-section-hint,
  body.audio-playing .teachany-section-hint {
    bottom: 170px;
  }
}