css

.navbar {
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  background-color: hsla(0, 0%, 100%, 0.2);
  box-shadow: 0 0 0.2rem rgba(0, 0, 0, 0.102), 0 0.2rem 0.4rem rgba(0, 0, 0, 0.2);
  opacity: 1;
  /* 添加过渡动画 */
  transition: backdrop-filter 0.5s linear, background-color 0.5s linear,
    box-shadow 0.5s linear, opacity 0.5s linear;
}

css

@media (max-width: 1100px) {
  省略... .navbar-sidebar {
    height: 200rem; /* 高度为视口高度的 200rem */
  }
}

css

.navbar-sidebar__backdrop {
  /* 移动端侧边栏背景色,背景色为透明 */
  background-color: rgba(0, 0, 0, 0);
}