.page-privacy {
  --prv-measure: 34em;
  --prv-toc-w: 190px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-privacy__crumb {
  padding-top: 26px;
  padding-bottom: 4px;
  position: relative;
  z-index: 2;
}

/* ---------- 首屏 ---------- */
.page-privacy__hero {
  position: relative;
  overflow: hidden;
}

.page-privacy__hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -90px;
  width: min(68%, 640px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(152deg, var(--flame) 0 46%, var(--clay) 46% 72%, transparent 72%);
  opacity: 0.13;
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 68%);
  pointer-events: none;
}

.page-privacy__hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 30px 0 56px;
}

.page-privacy__h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
  max-width: 13em;
}

.page-privacy__lede {
  margin: 0 0 24px;
  max-width: var(--prv-measure);
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

.page-privacy__stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-privacy__stamp-txt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

.page-privacy__hero-art {
  box-shadow: 10px 10px 0 rgba(226, 69, 42, 0.13);
}

/* ---------- 文档主体 ---------- */
.page-privacy__doc {
  padding-top: 8px;
  padding-bottom: 24px;
}

.page-privacy__doc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

/* ---------- 章节轨道 ---------- */
.page-privacy__toc {
  border: 1px solid var(--hair);
  background: rgba(18, 16, 15, 0.04);
  padding: 14px 16px 16px;
  border-radius: 2px;
}

.page-privacy__toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-privacy__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 8px;
  row-gap: 2px;
}

.page-privacy__toc-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  margin-left: -2px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-privacy__toc-list a:hover,
.page-privacy__toc-list a:focus-visible {
  color: var(--ink);
  border-left-color: var(--flame);
  background: rgba(226, 69, 42, 0.08);
}

.page-privacy__toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--flame);
  flex: none;
}

/* ---------- 章节 ---------- */
.page-privacy__sec {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "head"
    "body"
    "note"
    "line";
  row-gap: 18px;
  padding-top: 52px;
}

.page-privacy__sec:first-child {
  padding-top: 0;
}

.page-privacy__sec-head {
  grid-area: head;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--hair);
}

.page-privacy__sec-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--flame);
  flex: none;
  padding-top: 2px;
}

.page-privacy__h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.32;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.page-privacy__sec-body {
  grid-area: body;
  max-width: var(--prv-measure);
}

.page-privacy__sec-body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

.page-privacy__sec-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 旁注 ---------- */
.page-privacy__aside {
  grid-area: note;
  align-self: start;
  padding: 14px 16px 15px 18px;
  background: rgba(59, 58, 55, 0.08);
  border-left: 3px solid var(--amber);
  border-radius: 2px;
}

.page-privacy__aside p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 章末印刷细线 ---------- */
.page-privacy__sec-line {
  grid-area: line;
  position: relative;
  height: 1px;
  margin-top: 14px;
  background: var(--hair);
}

.page-privacy__sec-line::before,
.page-privacy__sec-line::after {
  content: "";
  position: absolute;
  top: -2px;
  width: 5px;
  height: 5px;
  background: var(--flame);
}

.page-privacy__sec-line::before {
  left: 0;
}

.page-privacy__sec-line::after {
  right: 0;
}

/* ---------- 可展开的字段明细 ---------- */
.page-privacy__fold {
  margin-top: 22px;
  border: 1px solid var(--hair);
  background: rgba(18, 16, 15, 0.035);
  border-radius: 2px;
}

.page-privacy__fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--clay);
  transition: background 0.2s ease, color 0.2s ease;
}

.page-privacy__fold summary::-webkit-details-marker {
  display: none;
}

.page-privacy__fold summary::before {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--flame);
}

.page-privacy__fold[open] summary::before {
  content: "−";
}

.page-privacy__fold summary:hover,
.page-privacy__fold summary:focus-visible {
  background: rgba(226, 69, 42, 0.07);
  color: var(--flame);
}

.page-privacy__fields {
  list-style: none;
  margin: 0;
  padding: 2px 18px 16px;
}

.page-privacy__fields li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 12px 0;
  border-top: 1px solid var(--hair);
}

.page-privacy__field-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--flame);
}

.page-privacy__field-val {
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 保留期限清单 ---------- */
.page-privacy__keep {
  margin: 4px 0 22px;
  border-top: 1px solid var(--hair);
}

.page-privacy__keep-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair);
}

.page-privacy__keep-row dt {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

.page-privacy__keep-row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 权利清单 ---------- */
.page-privacy__rights {
  list-style: none;
  margin: 4px 0 22px;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-privacy__rights li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair);
}

.page-privacy__rights-k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--flame);
}

.page-privacy__rights-v {
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 收束区 ---------- */
.page-privacy__outro {
  margin-top: 72px;
  padding: 104px 0 88px;
  background: var(--ink);
  color: var(--paper);
  clip-path: polygon(0 3.4%, 100% 0, 100% 100%, 0 100%);
}

.page-privacy__outro h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
  max-width: 18em;
}

.page-privacy__outro p {
  margin: 0 0 26px;
  max-width: var(--prv-measure);
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

.page-privacy__outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-privacy__outro-links .btn {
  text-decoration: none;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-privacy__fields li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-privacy__keep-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-privacy__rights li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-privacy__hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
    padding: 52px 0 84px;
  }

  .page-privacy__h1 {
    font-size: clamp(38px, 4.4vw, 58px);
  }
}

/* ---------- 桌面端：左侧固定章节轨道 + 右侧旁注 ---------- */
@media (min-width: 1080px) {
  .page-privacy__doc-grid {
    grid-template-columns: var(--prv-toc-w) minmax(0, 1fr);
    column-gap: 66px;
    align-items: start;
  }

  .page-privacy__toc {
    position: sticky;
    top: calc(var(--topbar-h) + 30px);
    align-self: start;
    border: none;
    border-left: 2px solid var(--hair);
    background: transparent;
    padding: 0 0 0 0;
    border-radius: 0;
  }

  .page-privacy__toc-title {
    padding-left: 12px;
    margin-bottom: 12px;
  }

  .page-privacy__toc-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-privacy__sec {
    grid-template-columns: minmax(0, var(--prv-measure)) minmax(0, 1fr);
    grid-template-areas:
      "head head"
      "body note"
      "line line";
    column-gap: 64px;
    row-gap: 22px;
    padding-top: 76px;
  }

  .page-privacy__sec:first-child {
    padding-top: 4px;
  }

  .page-privacy__aside {
    margin-top: 4px;
  }

  .page-privacy__outro {
    margin-top: 96px;
    padding: 112px 0 96px;
  }
}