.page-privacy {
  --pv-num-col: 2.25rem;
  --pv-def-line: var(--bamboo-pale);
  position: relative;
}

/* 阅读进度细条 */
.page-privacy .pv-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 60;
  background: linear-gradient(90deg, var(--cinnabar), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

@supports (animation-timeline: scroll()) {
  .page-privacy .pv-progress {
    animation: pv-read-progress linear both;
    animation-timeline: scroll(root block);
  }
}

@keyframes pv-read-progress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* 面包屑与首屏 */
.page-privacy .crumbs {
  margin-bottom: 1.75rem;
}

.page-privacy .pv-hero {
  padding-bottom: 2rem;
}

.page-privacy .pv-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 11vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0.5rem 0 1.25rem;
}

.page-privacy .pv-hero__lead {
  max-width: 34em;
  color: var(--charcoal);
  font-size: var(--fs-16);
  line-height: 1.9;
}

/* 开篇视觉停顿 */
.page-privacy .pv-figure {
  margin: 0 0 2.5rem;
  border: 1px solid var(--line);
  background: var(--paper);
  overflow: hidden;
}

.page-privacy .pv-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 布局：正文 + 章节索引 */
.page-privacy .pv-layout {
  display: grid;
  grid-template-areas:
    "toc"
    "body";
  row-gap: 2rem;
}

/* 章节索引（窄屏为横向标签） */
.page-privacy .pv-toc {
  grid-area: toc;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.page-privacy .pv-toc__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-privacy .pv-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.125rem;
}

.page-privacy .pv-toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: var(--fs-14);
  color: var(--charcoal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 0.125rem;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-privacy .pv-toc a span {
  font-size: var(--fs-12);
  color: var(--bamboo);
  letter-spacing: 0.06em;
}

.page-privacy .pv-toc a:hover,
.page-privacy .pv-toc a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-privacy .pv-toc a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

/* 正文 */
.page-privacy .pv-body {
  grid-area: body;
  min-width: 0;
}

.page-privacy .pv-sec {
  display: grid;
  grid-template-columns: var(--pv-num-col) minmax(0, 1fr);
  column-gap: 0.875rem;
  row-gap: 0.875rem;
  padding-block: 2.25rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: 2rem;
}

.page-privacy .pv-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-privacy .pv-sec__num {
  grid-column: 1;
  grid-row: 1;
  padding-top: 0.55rem;
  font-size: var(--fs-14);
  color: var(--bamboo);
  letter-spacing: 0.08em;
}

.page-privacy .pv-sec h2 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-22);
  line-height: 1.35;
  color: var(--ink);
}

.page-privacy .pv-sec__body {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
}

.page-privacy .pv-sec__body p {
  max-width: 34em;
  margin: 0 0 1rem;
  color: var(--charcoal);
  font-size: var(--fs-16);
  line-height: 1.9;
}

.page-privacy .pv-sec__body p:last-child {
  margin-bottom: 0;
}

/* 条目清单 */
.page-privacy .pv-defs {
  margin: 1.25rem 0 1.5rem;
  display: grid;
  gap: 1.125rem;
}

.page-privacy .pv-defs > div {
  padding-left: 0.9rem;
  border-left: 2px solid var(--pv-def-line);
}

.page-privacy .pv-defs dt {
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--ink);
  line-height: 1.6;
}

.page-privacy .pv-defs dd {
  margin: 0.35rem 0 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-privacy .pv-mark {
  background: var(--bamboo-pale);
  color: var(--charcoal);
  padding: 0.05em 0.32em;
  border-radius: 2px;
}

/* 结尾入口 */
.page-privacy .pv-end {
  margin-top: 2.5rem;
  padding: 1.5rem 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cinnabar);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 18px) 100%, 0 100%);
}

.page-privacy .pv-end h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: var(--fs-22);
  line-height: 1.35;
  color: var(--ink);
}

.page-privacy .pv-end p {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-privacy .pv-end__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

/* 中等屏幕起加宽编号列 */
@media (min-width: 640px) {
  .page-privacy {
    --pv-num-col: 3.5rem;
  }

  .page-privacy .pv-sec {
    column-gap: 1.5rem;
    padding-block: 3rem;
  }

  .page-privacy .pv-sec h2 {
    font-size: var(--fs-28);
  }

  .page-privacy .pv-end {
    padding: 2rem 2rem 2.25rem;
  }
}

/* 桌面端：右侧固定章节索引轨道 */
@media (min-width: 1000px) {
  .page-privacy {
    --pv-num-col: 4.5rem;
  }

  .page-privacy .pv-progress {
    left: var(--rail-w);
  }

  .page-privacy .pv-layout {
    grid-template-columns: minmax(0, 1fr) 8.5rem;
    grid-template-areas: "body toc";
    column-gap: 3.5rem;
    align-items: start;
  }

  .page-privacy .pv-toc {
    position: sticky;
    top: 5rem;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 1rem;
  }

  .page-privacy .pv-toc ol {
    display: grid;
    gap: 0.75rem;
  }

  .page-privacy .pv-toc a {
    font-size: var(--fs-14);
    line-height: 1.5;
  }

  .page-privacy .pv-sec h2 {
    font-size: var(--fs-38);
  }

  .page-privacy .pv-sec__num {
    padding-top: 0.85rem;
  }
}

@media (min-width: 1280px) {
  .page-privacy .pv-sec {
    padding-block: 3.5rem;
  }

  .page-privacy .pv-figure {
    margin-bottom: 3.5rem;
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-privacy .pv-progress {
    animation: none;
    transform: none;
    opacity: 0;
  }

  .page-privacy .pv-toc a {
    transition: none;
  }
}