/* SQE TTS 小喇叭按钮 */
#sqe-tts-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: #1890ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9999;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: background 0.2s, transform 0.2s;
    font-size: 20px;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
#sqe-tts-btn:hover { transform: scale(1.08); }
#sqe-tts-btn.playing { background: #52c41a; animation: sqe-pulse 1s infinite; }
@keyframes sqe-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.12); }
}