.page-privacy {
  --prv-num-w: 2.6rem;
  --prv-rail-w: 200px;
  background: var(--c-deep);
  color: var(--ink);
  padding: clamp(24px, 4vw, 54px) 0 clamp(56px, 8vw, 104px);
}

.page-privacy .breadcrumb {
  margin: 0 0 clamp(20px, 3vw, 32px);
  color: var(--ink-mute);
  font-size: 13px;
}
.page-privacy .breadcrumb a {
  color: var(--ink-mute);
  text-decoration: none;
  border-bottom: 1px solid var(--c-grid);
}
.page-privacy .breadcrumb a:hover,
.page-privacy .breadcrumb a:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
}

/* 首屏 */
.page-privacy .prv-hero {
  display: grid;
  gap: 14px;
  max-width: 82ch;
  padding-bottom: clamp(22px, 3vw, 34px);
  border-bottom: var(--rule);
}
.page-privacy .prv-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 6.2vw, 44px);
  line-height: 1.22;
  letter-spacing: 0.01em;
}
.page-privacy .prv-hero .lede {
  margin: 0;
  max-width: 64ch;
  color: var(--ink-dim);
  font-size: clamp(16.5px, 2.2vw, 19px);
  line-height: 1.78;
}
.page-privacy .prv-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
}
.page-privacy .prv-meta span::before {
  content: "—";
  margin-right: 8px;
  color: var(--c-cyan);
}

/* 顶部窄幅横幅 */
.page-privacy .prv-banner {
  display: grid;
  gap: 10px;
  margin: clamp(24px, 4vw, 44px) 0 0;
}
.page-privacy .prv-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: var(--rule);
  background: var(--c-steel);
}
.page-privacy .prv-banner .media-caption {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-mute);
}

/* 主栏 + 右侧细导轨 */
.page-privacy .prv-layout {
  display: grid;
  gap: 30px;
  margin-top: clamp(28px, 4vw, 48px);
}
.page-privacy .prv-body {
  min-width: 0;
}
.page-privacy .prv-rail {
  position: static;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  padding: 14px 0;
  border-top: 2px solid var(--c-cyan);
  border-bottom: var(--rule);
}
.page-privacy .prv-rail-title {
  margin: 0 0 8px;
  flex: 0 0 100%;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
}
.page-privacy .prv-rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-privacy .prv-rail a {
  display: inline-block;
  color: var(--ink-dim);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-privacy .prv-rail a:hover,
.page-privacy .prv-rail a:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
}
.page-privacy .prv-rail a[aria-current="true"] {
  color: var(--c-cyan);
}

/* 条款 */
.page-privacy .prv-clause,
.page-privacy .prv-version {
  display: grid;
  grid-template-columns: var(--prv-num-w) minmax(0, 1fr);
  gap: 0 16px;
}
.page-privacy .prv-clause {
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: var(--rule);
}
.page-privacy .prv-clause:first-child {
  padding-top: clamp(16px, 2vw, 22px);
}
.page-privacy .prv-num {
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
  padding-right: 14px;
  border-right: var(--rule);
}
.page-privacy .prv-clause-body {
  max-width: 68ch;
  min-width: 0;
}
.page-privacy .prv-clause-body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 27px);
  line-height: 1.32;
}
.page-privacy .prv-clause-body p {
  margin: 0 0 14px;
  color: var(--ink-dim);
  font-size: 16.5px;
  line-height: 1.78;
}
.page-privacy .prv-clause-body p:last-child {
  margin-bottom: 0;
}
.page-privacy .prv-clause-body .mono {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

/* 定义与条目列表 */
.page-privacy .prv-def {
  display: grid;
  gap: 16px;
  margin: 0 0 16px;
}
.page-privacy .prv-def dt {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}
.page-privacy .prv-def dd {
  margin: 0;
  color: var(--ink-dim);
  font-size: 16.5px;
  line-height: 1.78;
}
.page-privacy .prv-list {
  display: grid;
  gap: 12px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}
.page-privacy .prv-list li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-dim);
  font-size: 16.5px;
  line-height: 1.78;
}
.page-privacy .prv-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 13px;
  height: 1px;
  background: var(--c-cyan);
}
.page-privacy .prv-list strong {
  color: var(--ink);
  font-weight: 600;
}

/* 关键义务句 */
.page-privacy .prv-key {
  margin: 0 0 16px;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--c-cyan);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.78;
}

/* 纸白版本分区 */
.page-privacy .prv-version {
  margin-top: clamp(28px, 4vw, 46px);
  padding: clamp(22px, 3.4vw, 34px);
  background: var(--c-paper);
  color: var(--ink-dark);
  border: var(--rule);
}
.page-privacy .prv-version .prv-num {
  color: #0B6E63;
  border-right-color: rgba(10, 34, 55, 0.22);
}
.page-privacy .prv-version h2 {
  color: var(--c-deep);
}
.page-privacy .prv-version p,
.page-privacy .prv-version li {
  color: var(--ink-dark);
}
.page-privacy .prv-version .prv-list li::before {
  background: var(--c-coral);
}

/* 操作区与页尾锚点 */
.page-privacy .prv-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}
.page-privacy .prv-footnote {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-mute);
}
.page-privacy .prv-footnote a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--c-grid);
}
.page-privacy .prv-footnote a:hover,
.page-privacy .prv-footnote a:focus-visible {
  border-color: var(--c-cyan);
}

/* 窄屏至平板 */
@media (max-width: 600px) {
  .page-privacy {
    --prv-num-w: 1.9rem;
  }
  .page-privacy .prv-clause,
  .page-privacy .prv-version {
    gap: 0 12px;
  }
  .page-privacy .prv-num {
    padding-right: 9px;
    font-size: 15px;
    letter-spacing: 0.06em;
  }
  .page-privacy .prv-clause-body h2 {
    font-size: 20px;
  }
  .page-privacy .prv-list li,
  .page-privacy .prv-def dd,
  .page-privacy .prv-clause-body p {
    font-size: 16px;
  }
}

/* 桌面：非对称双栏，导轨右侧固定 */
@media (min-width: 1024px) {
  .page-privacy .prv-layout {
    grid-template-columns: minmax(0, 1fr) var(--prv-rail-w);
    gap: clamp(36px, 4vw, 56px);
    align-items: start;
  }
  .page-privacy .prv-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 96px;
    display: block;
    padding: 18px 16px 20px;
    border: var(--rule);
    border-top: 2px solid var(--c-cyan);
    background: var(--c-trench);
  }
  .page-privacy .prv-rail-list {
    display: block;
    margin-bottom: 20px;
  }
  .page-privacy .prv-rail-list:last-child {
    margin-bottom: 0;
  }
  .page-privacy .prv-rail-list li + li {
    margin-top: 9px;
  }
  .page-privacy .prv-body {
    grid-column: 1;
    grid-row: 1;
  }
}

/* 宽屏：条款编号竖排，与正文形成细线分隔 */
@media (min-width: 768px) {
  .page-privacy .prv-num {
    writing-mode: vertical-rl;
    text-orientation: upright;
    justify-self: start;
    padding-right: 0;
    padding-bottom: 14px;
    border-right: 0;
    border-bottom: var(--rule);
  }
  .page-privacy .prv-clause,
  .page-privacy .prv-version {
    gap: 0 22px;
  }
  .page-privacy .prv-clause-body {
    border-left: var(--rule);
    padding-left: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .prv-rail a {
    transition: none;
  }
}