.page-privacy {
  --clause-accent: var(--sunset);
  --clause-line: rgba(16, 43, 54, .14);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* 首屏 */
.page-privacy .privacy-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 26px 0 48px;
}

.page-privacy .privacy-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -100px;
  right: -38%;
  width: 120%;
  height: 150%;
  background: linear-gradient(152deg, var(--lake) 0%, var(--lake-deep) 62%, #08323f 100%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 76%);
  opacity: .18;
}

.page-privacy .privacy-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}

.page-privacy .hero-title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: .03em;
  color: var(--ink);
}

.page-privacy .hero-lede {
  margin: 18px 0 0;
  max-width: 32em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-privacy .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-privacy .privacy-hero-media {
  margin: 0;
  min-height: 150px;
  background: var(--lake-mist);
  clip-path: polygon(0 6%, 100% 0, 100% 94%, 0 100%);
}

.page-privacy .privacy-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* 主体：章节轨道 + 条款 */
.page-privacy .privacy-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-bottom: 64px;
}

.page-privacy .privacy-rail {
  border-top: 2px solid var(--lake-deep);
  padding-top: 12px;
}

.page-privacy .rail-heading {
  margin: 0 0 10px;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-privacy .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-privacy .rail-list li {
  flex: 0 0 auto;
}

.page-privacy .rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--hairline);
  background: var(--paper);
  color: var(--ink);
  font-size: .84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-privacy .rail-list a:hover {
  border-color: var(--sunset);
  background: var(--sunset-pale);
}

.page-privacy .rail-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .76rem;
  color: var(--sunset);
}

.page-privacy .rail-back {
  display: none;
  margin-top: 16px;
  font-size: .84rem;
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-privacy .rail-back:hover {
  color: var(--sunset);
}

.page-privacy .privacy-content {
  max-width: 68ch;
}

/* 条款块 */
.page-privacy .privacy-clause {
  border-top: 1px solid var(--hairline);
  padding-top: 20px;
  margin-top: 36px;
}

.page-privacy .privacy-clause:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-privacy .clause-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-privacy .clause-num {
  flex: none;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .88rem;
  letter-spacing: .04em;
  color: var(--sunset);
}

.page-privacy .clause-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 4.6vw, 1.7rem);
  line-height: 1.32;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-privacy .clause-body p {
  margin: 0 0 14px;
  font-size: .98rem;
  line-height: 1.8;
}

.page-privacy .clause-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-privacy .clause-list li {
  position: relative;
  padding-left: 18px;
  font-size: .96rem;
  line-height: 1.78;
}

.page-privacy .clause-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--saffron);
  transition: width 160ms var(--ease), background-color 160ms var(--ease);
}

.page-privacy .clause-list li:hover::before {
  width: 13px;
  background: var(--sunset);
}

.page-privacy .clause-list strong {
  font-weight: 700;
  color: var(--lake-deep);
}

/* 折叠补充 */
.page-privacy .clause-more {
  margin: 4px 0 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--sunset-pale);
}

.page-privacy .clause-more summary {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  color: var(--lake);
}

.page-privacy .clause-more summary::-webkit-details-marker {
  display: none;
}

.page-privacy .clause-more summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--sunset);
}

.page-privacy .clause-more[open] summary::before {
  content: "–";
}

.page-privacy .clause-more summary:hover {
  color: var(--lake-deep);
}

.page-privacy .clause-more p {
  margin: 10px 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--stone);
}

/* 留存期限表 */
.page-privacy .table-scroll {
  margin: 0 0 16px;
  overflow-x: auto;
  border: 1px solid var(--clause-line);
  background: var(--lake-mist);
}

.page-privacy .retention-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .94rem;
}

.page-privacy .retention-table th,
.page-privacy .retention-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.62;
  border-bottom: 1px solid var(--clause-line);
}

.page-privacy .retention-table thead th {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  font-weight: 600;
  color: var(--lake-deep);
  background: rgba(10, 74, 94, .09);
}

.page-privacy .retention-table tbody th {
  font-weight: 700;
  color: var(--ink);
}

.page-privacy .retention-table tbody tr:last-child th,
.page-privacy .retention-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-privacy .retention-table tbody tr:hover {
  background: rgba(248, 245, 236, .72);
}

/* 联系信息块 */
.page-privacy .contact-slab {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 6px 0 18px;
  padding: 22px;
  background: var(--lake-deep);
  color: var(--paper);
  border-left: 4px solid var(--sunset);
}

.page-privacy .contact-label {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--sunset-pale);
}

.page-privacy .contact-mail {
  margin: 8px 0 14px;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.5;
  word-break: break-all;
  color: var(--paper);
}

.page-privacy .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-privacy .contact-slab .copy-btn {
  padding: 8px 16px;
  border: 0;
  background: var(--sunset);
  color: var(--paper);
  font: inherit;
  font-size: .84rem;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background-color 160ms var(--ease);
}

.page-privacy .contact-slab .copy-btn:hover {
  background: #c85a20;
}

.page-privacy .copy-feedback {
  font-size: .8rem;
  color: var(--sunset-pale);
}

.page-privacy .contact-meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: .88rem;
}

.page-privacy .contact-meta li {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hairline-light);
  word-break: break-all;
}

.page-privacy .contact-meta li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-privacy .contact-meta span {
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--sunset-pale);
}

/* 返回页首 */
.page-privacy .back-top-wrap {
  margin: 42px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
}

.page-privacy .back-top {
  display: inline-block;
  padding-bottom: 3px;
  font-size: .86rem;
  color: var(--lake-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--sunset);
  transition: color 160ms var(--ease);
}

.page-privacy .back-top:hover {
  color: var(--sunset);
}

/* 焦点反馈 */
.page-privacy a:focus-visible,
.page-privacy summary:focus-visible,
.page-privacy button:focus-visible {
  outline: 2px solid var(--sunset);
  outline-offset: 3px;
}

/* 移动端表格转堆叠 */
@media (max-width: 720px) {
  .page-privacy .retention-table,
  .page-privacy .retention-table tbody,
  .page-privacy .retention-table tr,
  .page-privacy .retention-table th,
  .page-privacy .retention-table td {
    display: block;
  }

  .page-privacy .retention-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .page-privacy .retention-table tr {
    padding: 14px;
    border-bottom: 1px solid var(--clause-line);
  }

  .page-privacy .retention-table tbody tr:last-child {
    border-bottom: 0;
  }

  .page-privacy .retention-table tbody th {
    margin-bottom: 6px;
    font-size: .98rem;
    border-bottom: 0;
  }

  .page-privacy .retention-table td {
    display: grid;
    grid-template-columns: 6.4em minmax(0, 1fr);
    gap: 8px;
    padding: 3px 0;
    border-bottom: 0;
  }

  .page-privacy .retention-table td::before {
    content: attr(data-label);
    font-size: .8rem;
    color: var(--lake-deep);
  }
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-privacy .privacy-hero {
    padding: 40px 0 68px;
  }

  .page-privacy .privacy-hero::before {
    right: -18%;
    width: 78%;
    opacity: .94;
  }

  .page-privacy .privacy-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 56px;
  }

  .page-privacy .privacy-body {
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 56px;
    padding-bottom: 88px;
  }

  .page-privacy .privacy-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    align-self: start;
  }

  .page-privacy .rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-privacy .rail-list a {
    padding: 7px 0 7px 12px;
    border: 0;
    border-left: 2px solid var(--hairline);
    background: transparent;
    white-space: normal;
    line-height: 1.5;
  }

  .page-privacy .rail-list a:hover {
    border-left-color: var(--sunset);
    background: transparent;
    color: var(--lake-deep);
  }

  .page-privacy .rail-back {
    display: inline-block;
  }

  .page-privacy .contact-slab {
    grid-template-columns: 1.1fr .9fr;
    gap: 28px;
    padding: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .rail-list a,
  .page-privacy .clause-list li::before,
  .page-privacy .contact-slab .copy-btn,
  .page-privacy .back-top {
    transition: none;
  }
}