.page-privacy {
  --privacy-rule: rgba(46, 123, 196, .2);
  --privacy-rule-soft: rgba(46, 123, 196, .12);
  background: var(--yak);
  color: var(--ink);
  padding-bottom: clamp(4rem, 9vw, 7rem);
}

/* ---------- 顶部门背刻痕区块 ---------- */

.page-privacy .privacy-gate {
  position: relative;
  margin: 0 var(--gutter);
  padding: clamp(3rem, 8vw, 5.5rem) clamp(1.5rem, 6vw, 4.5rem) clamp(2.75rem, 7vw, 4.5rem);
  background: var(--cobalt-deep);
  color: var(--on-deep);
  border: 1px solid var(--gold-line);
  overflow: hidden;
}

.page-privacy .privacy-gate::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(247, 242, 232, .055) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(247, 242, 232, .04) 0 1px, transparent 1px 78px);
  pointer-events: none;
}

.page-privacy .privacy-gate::after {
  content: "";
  position: absolute;
  top: 0;
  right: clamp(1.5rem, 6vw, 4.5rem);
  width: 1px;
  height: 42%;
  background: linear-gradient(180deg, var(--gold), transparent);
  pointer-events: none;
}

.page-privacy .privacy-gate__inner {
  position: relative;
  z-index: 1;
  max-width: 46rem;
}

.page-privacy .privacy-gate__mark {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-privacy .privacy-gate .display {
  margin: 0 0 1.5rem;
  font-weight: 250;
  letter-spacing: -.01em;
  line-height: 1.06;
}

.page-privacy .privacy-gate__lede {
  margin: 0 0 1rem;
  max-width: 34rem;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.95;
  color: var(--on-deep-dim);
}

.page-privacy .privacy-gate__note {
  margin: 0;
  padding-left: .9rem;
  border-left: 1px solid var(--gold-line);
  max-width: 32rem;
  font-size: .875rem;
  line-height: 1.85;
  color: var(--on-deep-faint);
}

/* ---------- 两栏骨架 ---------- */

.page-privacy .privacy-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-top: clamp(2.5rem, 6vw, 4rem);
}

@media (min-width: 60rem) {
  .page-privacy .privacy-layout {
    grid-template-columns: minmax(0, 14.5rem) minmax(0, 1fr);
    gap: clamp(3rem, 6vw, 5.5rem);
  }
}

/* ---------- 左侧目录 ---------- */

.page-privacy .privacy-rail {
  border-left: 1px solid var(--gold-faint);
  padding-left: 1rem;
  opacity: .74;
}

@media (min-width: 60rem) {
  .page-privacy .privacy-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.75rem);
    align-self: start;
  }
}

.page-privacy .privacy-rail__caption {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .22em;
  color: var(--muted);
}

.page-privacy .privacy-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-privacy .privacy-rail__list > li + li {
  margin-top: .1rem;
}

.page-privacy .privacy-rail .index-rail__link {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .5rem 0;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-privacy .privacy-rail .index-rail__link:hover,
.page-privacy .privacy-rail .index-rail__link:focus-visible {
  color: var(--cobalt-mid);
  border-color: var(--gold-line);
}

.page-privacy .privacy-rail .index-rail__link.is-current {
  color: var(--ink);
}

.page-privacy .privacy-rail .index-rail__link.is-current .index-rail__num {
  color: var(--saffron);
}

.page-privacy .privacy-rail .index-rail__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .1em;
  color: var(--gold);
}

/* ---------- 正文章节 ---------- */

.page-privacy .privacy-body {
  min-width: 0;
}

.page-privacy .privacy-section {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.page-privacy .privacy-section + .privacy-section {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: clamp(2.25rem, 5vw, 3.25rem);
  border-top: 1px solid var(--hair);
}

.page-privacy .privacy-section__index {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-privacy .privacy-section__title {
  margin: 0 0 .9rem;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.page-privacy .privacy-section__summary {
  margin: 0 0 1.5rem;
  padding-left: .95rem;
  border-left: 2px solid var(--cobalt-bright);
  max-width: 42em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-privacy .privacy-section__tail {
  margin: 1.5rem 0 0;
  max-width: 42em;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-privacy .privacy-body a {
  color: var(--cobalt-mid);
  text-decoration: underline;
  text-decoration-color: var(--gold-line);
  text-underline-offset: .25em;
}

.page-privacy .privacy-body a:hover,
.page-privacy .privacy-body a:focus-visible {
  color: var(--saffron);
  text-decoration-color: var(--saffron);
}

/* ---------- 条目列表 ---------- */

.page-privacy .privacy-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-privacy .privacy-list__item {
  padding: .95rem 0;
  border-top: 1px solid var(--privacy-rule-soft);
}

.page-privacy .privacy-list__item:first-child {
  border-top-color: var(--privacy-rule);
}

.page-privacy .privacy-list__label {
  margin: 0 0 .25rem;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

.page-privacy .privacy-list__desc {
  margin: 0;
  max-width: 44em;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 留存周期图 ---------- */

.page-privacy .privacy-figure {
  margin: 0 0 1.75rem;
  border: 1px solid var(--hair);
  background: var(--surface);
  box-shadow: var(--shadow-1);
}

.page-privacy .privacy-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 800;
  object-fit: cover;
}

.page-privacy .privacy-figure .media-caption {
  padding: .7rem .95rem;
  border-top: 1px solid var(--hair);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 留存刻度带 ---------- */

.page-privacy .retention-band {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-privacy .retention-band__row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .4rem;
  padding: .9rem 0;
  border-top: 1px solid var(--privacy-rule-soft);
}

.page-privacy .retention-band__row:first-child {
  border-top: 1px solid var(--privacy-rule);
}

@media (min-width: 42rem) {
  .page-privacy .retention-band__row {
    grid-template-columns: 11rem minmax(0, 1fr) 6.5rem;
    align-items: center;
    gap: 1.25rem;
  }
}

.page-privacy .retention-band__name {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--ink);
}

.page-privacy .retention-band__track {
  display: block;
  position: relative;
  height: 4px;
  background: var(--privacy-rule-soft);
}

.page-privacy .retention-band__fill {
  display: block;
  height: 100%;
  background: var(--cobalt-mid);
}

.page-privacy .retention-band__fill--a { width: 100%; }
.page-privacy .retention-band__fill--c { width: 54%; }
.page-privacy .retention-band__fill--b { width: 25%; }

.page-privacy .retention-band__fill--d {
  width: 100%;
  background: repeating-linear-gradient(90deg, var(--saffron) 0 6px, transparent 6px 13px);
}

.page-privacy .retention-band__value {
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--muted);
}

@media (min-width: 42rem) {
  .page-privacy .retention-band__value {
    text-align: right;
  }
}

.page-privacy .retention-band__row::after {
  content: attr(data-label);
  position: absolute;
  left: 0;
  bottom: calc(100% - .35rem);
  z-index: 3;
  max-width: 22rem;
  padding: .45rem .7rem;
  background: var(--surface);
  border: 1px solid var(--gold-faint);
  box-shadow: var(--shadow-2);
  font-size: .78125rem;
  line-height: 1.65;
  color: var(--ink);
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-privacy .retention-band__row:hover::after,
.page-privacy .retention-band__row:focus-within::after {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 收束 ---------- */

.page-privacy .privacy-tail {
  height: 0;
  margin: clamp(3rem, 7vw, 5rem) 0 0;
  border: 0;
  border-top: 1px solid var(--gold-line);
}

.page-privacy .privacy-outro {
  margin: 1.5rem 0 0;
  max-width: 40em;
  font-size: .9375rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-privacy .privacy-outro a {
  color: var(--cobalt-mid);
  text-decoration: underline;
  text-decoration-color: var(--gold-line);
  text-underline-offset: .25em;
}

.page-privacy .privacy-outro a:hover,
.page-privacy .privacy-outro a:focus-visible {
  color: var(--saffron);
  text-decoration-color: var(--saffron);
}

/* ---------- 返回顶部 ---------- */

.page-privacy .back-to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem .85rem;
  background: var(--surface);
  border: 1px solid var(--gold-line);
  box-shadow: var(--shadow-1);
  color: var(--ink);
  font-size: .8125rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-privacy .back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.page-privacy .back-to-top:hover,
.page-privacy .back-to-top:focus-visible {
  border-color: var(--saffron);
}

.page-privacy .back-to-top__sign {
  font-size: .875rem;
  color: var(--saffron);
}

.page-privacy .back-to-top__label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--muted);
}

@media (max-width: 30rem) {
  .page-privacy .back-to-top__label {
    display: none;
  }
}

/* ---------- 动效收敛 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-privacy .retention-band__row::after,
  .page-privacy .back-to-top,
  .page-privacy .privacy-rail .index-rail__link {
    transition: none;
  }
}