/** v2 导航：透明 → 滚动后毛玻璃，大标题在页面内容区 **/
.nav-root {
  position: relative;
  flex: none;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  border-bottom: 1rpx solid transparent;
  transition: background .3s cubic-bezier(.32, .72, 0, 1), border-color .3s cubic-bezier(.32, .72, 0, 1);
}

.nav.is-glass {
  background: var(--glass, rgba(255, 255, 255, .72));
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--hairline, rgba(0, 0, 0, .08));
}

.nav-bar {
  position: relative;
  height: 88rpx;
  display: flex;
  align-items: center;
  padding-left: 40rpx;
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-back {
  width: 68rpx;
  height: 68rpx;
  margin-left: -14rpx;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink, #0A0A0A);
  transition: background .16s cubic-bezier(.32, .72, 0, 1), transform .16s cubic-bezier(.32, .72, 0, 1);
}

.nav-back .icon {
  width: 38rpx;
  height: 38rpx;
}

.nav-press {
  background: var(--fill, rgba(120, 120, 128, .07));
  transform: scale(.94);
}

.nav-title {
  position: absolute;
  left: 50%;
  bottom: 0;
  height: 88rpx;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  max-width: 320rpx;
  font-size: 32rpx;
  font-weight: 600;
  letter-spacing: -.005em;
  opacity: 0;
  transition: opacity .26s cubic-bezier(.32, .72, 0, 1);
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-title.is-on {
  opacity: 1;
}

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16rpx;
}

/* 悬浮导航不参与文档流，用等高占位撑开内容（高度由内联样式给出） */
.nav-holder {
  width: 100%;
  flex: none;
}