.rotate-btn {
  position: fixed;
  z-index: 999999;
  border-radius: 50%;
  background: linear-gradient(135deg, #4b9bff, #2f6bff);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
  user-select: none;
  -webkit-user-drag: none;
  touch-action: none;
  left: 0px;
  top: 0px;
  /* iOS层级优化 */
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  will-change: transform;
  /* 创建新的层叠上下文 */
  isolation: isolate;
  opacity: 0.7;
}

.rotate-btn.landscape {
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.rotate-btn .icon {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 2px;
  transition: all 0.3s ease;
}

.rotate-btn.landscape .icon {
  transform: rotate(-90deg);
}