.page-privacy {
  --pv-rail: 250px;
  --pv-doc-max: 74ch;
  --pv-text: rgba(232, 244, 248, 0.88);
  --pv-text-soft: rgba(232, 244, 248, 0.78);

  background: var(--c-ink);
  color: var(--c-paper);
  font-family: var(--f-body);
  font-size: var(--fs-17);
  line-height: 1.75;
  overflow-x: clip;
}

/* ── 首屏 ───────────────────────────────────────── */
.page-privacy .pv-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--shell-offset) + 1.25rem) 0 clamp(2.5rem, 6vw, 4.25rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(0, 229, 255, 0.10) 0%, rgba(6, 26, 43, 0) 62%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-ink-2) 100%);
}

.page-privacy .pv-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(159, 182, 196, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 182, 196, 0.09) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-privacy .pv-hero-media {
  position: absolute;
  right: 0;
  bottom: -8%;
  z-index: -1;
  width: min(62%, 720px);
  max-width: 100%;
  height: auto;
  opacity: 0.26;
  object-fit: cover;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, #000 58%);
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, #000 58%);
}

.page-privacy .pv-hero-inner {
  position: relative;
}

.page-privacy .pv-h1 {
  margin: 0.6rem 0 1.1rem;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: var(--fs-64);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-privacy .pv-lede {
  max-width: 44ch;
  margin: 0 0 1.85rem;
  font-size: var(--fs-20);
  line-height: 1.72;
  color: var(--pv-text);
}

.page-privacy .pv-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.25rem;
}

.page-privacy .pv-stat {
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-privacy .pv-stat b {
  color: var(--c-cyan);
  font-weight: 500;
}

/* ── 主体栅格 ──────────────────────────────────── */
.page-privacy .pv-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(3rem, 7vw, 5.5rem);
}

/* ── 小节索引 ──────────────────────────────────── */
.page-privacy .pv-toc {
  order: -1;
  position: sticky;
  top: var(--hdr-h-condensed);
  z-index: 3;
  margin: 0;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(6, 26, 43, 0.94);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.page-privacy .pv-toc-title {
  display: none;
  margin: 0 0 0.7rem;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-privacy .pv-toc-list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.15rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-privacy .pv-toc-item {
  flex: 0 0 auto;
}

.page-privacy .pv-toc-link {
  display: inline-block;
  white-space: nowrap;
  padding: 0.32rem 0.62rem;
  border: 1px solid var(--line-soft);
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--c-mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-privacy .pv-toc-link:hover,
.page-privacy .pv-toc-link:focus-visible {
  color: var(--c-cyan);
  border-color: var(--line-cyan);
  background: rgba(0, 229, 255, 0.05);
}

/* ── 文档正文 ──────────────────────────────────── */
.page-privacy .pv-doc {
  max-width: var(--pv-doc-max);
}

.page-privacy .pv-section {
  padding-top: clamp(1.9rem, 4vw, 2.85rem);
  scroll-margin-top: calc(var(--hdr-h-condensed) + 5rem);
}

.page-privacy .pv-section:first-child {
  padding-top: 0.5rem;
}

.page-privacy .pv-section + .pv-section {
  border-top: 1px solid var(--line-soft);
}

.page-privacy .pv-sec-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 1.15rem;
}

.page-privacy .pv-sec-num {
  flex: 0 0 auto;
  font-family: var(--f-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
  color: var(--c-amber);
}

.page-privacy .pv-sec-title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 700;
  font-size: var(--fs-28);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--c-paper);
}

.page-privacy .pv-doc p {
  max-width: 40em;
  margin: 0 0 1.15rem;
  color: var(--pv-text);
}

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

.page-privacy .pv-note {
  margin-top: 1.4rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--f-serif);
  font-size: var(--fs-15);
  color: var(--c-mist);
}

/* 条目列表 */
.page-privacy .pv-list {
  display: grid;
  gap: 0.6rem;
  max-width: 40em;
  margin: 0 0 1.15rem;
  padding: 0;
  list-style: none;
}

.page-privacy .pv-list li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--pv-text);
}

.page-privacy .pv-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 10px;
  height: 1px;
  background: var(--c-cyan);
}

/* 可展开条款块 */
.page-privacy .pv-clause {
  margin: 1.6rem 0 0.4rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-cyan);
  background: rgba(18, 48, 68, 0.42);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-privacy .pv-clause:hover {
  border-color: var(--line-cyan);
  background: rgba(18, 48, 68, 0.62);
}

.page-privacy .pv-clause summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--f-head);
  font-size: var(--fs-15);
  font-weight: 600;
  color: var(--c-cyan);
}

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

.page-privacy .pv-clause summary::after {
  content: "＋";
  font-family: var(--f-mono);
  font-size: var(--fs-15);
  color: var(--c-mist);
  transition: color var(--dur) var(--ease);
}

.page-privacy .pv-clause summary:hover::after,
.page-privacy .pv-clause summary:focus-visible::after {
  color: var(--c-cyan);
}

.page-privacy .pv-clause[open] summary::after {
  content: "－";
  color: var(--c-cyan);
}

.page-privacy .pv-clause-body {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line-soft);
}

.page-privacy .pv-clause-body p {
  max-width: 40em;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--pv-text-soft);
}

/* 数据流向示意 */
.page-privacy .pv-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 1.6rem 0 2rem;
}

.page-privacy .pv-flow-card {
  padding: 1rem 1.1rem 0.9rem;
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(18, 48, 68, 0.62), rgba(6, 26, 43, 0.3));
}

.page-privacy .pv-flow-tag {
  margin: 0 0 0.4rem;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-privacy .pv-flow-card--local .pv-flow-tag {
  color: var(--c-mint);
}

.page-privacy .pv-flow-card--agg .pv-flow-tag {
  color: var(--c-amber);
}

.page-privacy .pv-flow-text {
  margin: 0 0 0.85rem;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--pv-text-soft);
}

.page-privacy .pv-flow-line {
  display: block;
  width: 100%;
  max-width: 240px;
  height: auto;
}

/* 联系信息 */
.page-privacy .pv-contact {
  display: grid;
  gap: 0;
  max-width: 40em;
  margin: 0.4rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-privacy .pv-contact li {
  display: grid;
  gap: 0.2rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-privacy .pv-contact-key {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-mist);
}

.page-privacy .pv-contact-val {
  color: var(--c-paper);
  font-size: var(--fs-17);
  text-decoration: none;
  word-break: break-word;
}

.page-privacy a.pv-contact-val {
  border-bottom: 1px solid var(--line-cyan);
  transition: color var(--dur) var(--ease);
}

.page-privacy a.pv-contact-val:hover,
.page-privacy a.pv-contact-val:focus-visible {
  color: var(--c-cyan);
}

/* 延伸阅读 */
.page-privacy .pv-links {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}

.page-privacy .pv-links-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.page-privacy .pv-link {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line-soft);
  background: rgba(11, 44, 61, 0.5);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-privacy .pv-link:hover,
.page-privacy .pv-link:focus-visible {
  border-color: var(--line-cyan);
  background: rgba(18, 48, 68, 0.72);
}

.page-privacy .pv-link-title {
  font-family: var(--f-head);
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--c-paper);
}

.page-privacy .pv-link:hover .pv-link-title {
  color: var(--c-cyan);
}

.page-privacy .pv-link-desc {
  font-size: var(--fs-15);
  line-height: 1.65;
  color: var(--c-mist);
}

/* ── 桌面布局 ──────────────────────────────────── */
@media (min-width: 640px) {
  .page-privacy .pv-flow {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-privacy .pv-links-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-privacy .pv-contact li {
    grid-template-columns: 9rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 1000px) {
  .page-privacy .pv-layout {
    grid-template-columns: minmax(0, 1fr) var(--pv-rail);
    gap: clamp(2.5rem, 5vw, 4.5rem);
    padding-block: clamp(2.5rem, 4vw, 3.5rem) clamp(3.5rem, 7vw, 5.5rem);
  }

  .page-privacy .pv-toc {
    order: 0;
    top: calc(var(--hdr-h-condensed) + 1.5rem);
    padding: 0 0 0 1.15rem;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .page-privacy .pv-toc-title {
    display: block;
  }

  .page-privacy .pv-toc-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-privacy .pv-toc-item + .pv-toc-item {
    margin-top: 0.3rem;
  }

  .page-privacy .pv-toc-link {
    padding: 0.12rem 0;
    border: 0;
    letter-spacing: 0.02em;
  }
}

@media (min-width: 1280px) {
  .page-privacy .pv-doc {
    padding-right: 0.5rem;
  }
}