/* 基础按钮样式增强 */
.rightside-btn {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

/* 隐藏状态：结合缩放、透明度和位移 */
.rightside-btn.hidden {
  opacity: 0 !important;
  visibility: hidden !important;
  transform: scale(0) translateY(20px) !important;
  pointer-events: none !important;
  
  /* 解决空间占用问题 */
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  border-width: 0 !important;
}