.ui-nav {
  position:sticky;
  top:0;
  left:0;
  width:100%;
  z-index:var(--z-sticky);
  box-sizing:border-box;
}
.ui-nav--card {
  background:var(--color-bg-card);
  border-bottom:1rpx solid var(--color-divider);
}
.ui-nav--transparent {
  background:transparent;
}
.ui-nav__bar {
  display:flex;
  align-items:center;
  height:88rpx;
  padding:0 var(--spacing-2);
}
.ui-nav__back,
.ui-nav__placeholder {
  width:64rpx;
  min-height:var(--tap-min);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
min-width:var(--tap-min);}
.ui-nav__back-icon {
  width:36rpx;
  height:36rpx;
}
.ui-nav__title {
  flex:1;
  text-align:center;
  font-size:var(--font-size-lg);
  font-weight:var(--font-weight-semibold);
  color:var(--color-text-primary);
  overflow:hidden;
  white-space:nowrap;
  text-overflow:ellipsis;
}
.ui-nav__right {
  flex-shrink:0;
  min-width:64rpx;
  display:flex;
  align-items:center;
  justify-content:flex-end;
}