.page-privacy {
  --prv-rule: rgba(41, 48, 61, 0.9);
  --prv-text: #C9D2DE;
  --prv-panel: rgba(20, 24, 33, 0.6);
  background: var(--ink);
  color: var(--white);
}

.page-privacy .prv-hero {
  position: relative;
  padding: clamp(22px, 4vw, 46px) 0 clamp(22px, 4vw, 44px);
  border-bottom: var(--line);
}

.page-privacy .prv-hero__head {
  position: relative;
  margin-top: clamp(18px, 3vw, 30px);
}

.page-privacy .prv-hero__title {
  margin: 10px 0 0;
  font-size: clamp(30px, 5.6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-privacy .prv-hero__lead {
  max-width: 62ch;
  margin-top: 16px;
  color: var(--prv-text);
}

.page-privacy .prv-hero__sidenote {
  display: none;
}

.page-privacy .prv-hero__media {
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-privacy .prv-body {
  padding: clamp(34px, 6vw, 82px) 0 clamp(56px, 8vw, 112px);
}

.page-privacy .prv-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

/* 章节索引 */
.page-privacy .prv-index {
  min-width: 0;
}

.page-privacy .prv-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mist-dim);
}

.page-privacy .prv-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-privacy .prv-index__item {
  flex: 0 0 auto;
}

.page-privacy .prv-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--steel);
  background: var(--cab);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.page-privacy .prv-index__link:hover,
.page-privacy .prv-index__link:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  background: #10141d;
}

.page-privacy .prv-index__num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* 正文文档区 */
.page-privacy .prv-doc {
  position: relative;
  min-width: 0;
  max-width: 74ch;
}

.page-privacy .prv-chapter {
  padding: clamp(28px, 4vw, 46px) 0;
  border-top: var(--line);
  scroll-margin-top: 100px;
}

.page-privacy .prv-chapter:last-of-type {
  border-bottom: var(--line);
}

.page-privacy .prv-chapter:target {
  border-top-color: var(--amber);
}

.page-privacy .prv-chapter:target .prv-chapter__num {
  color: var(--gold);
}

.page-privacy .prv-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-privacy .prv-chapter__num {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-privacy .prv-chapter__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.3;
}

.page-privacy .prv-chapter__body p {
  margin: 0 0 14px;
  color: var(--prv-text);
  line-height: 1.8;
}

.page-privacy .prv-chapter__body p:last-child {
  margin-bottom: 0;
}

.page-privacy .prv-chapter__body strong {
  color: var(--white);
  font-weight: 700;
}

.page-privacy .prv-chapter__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 216, 230, 0.35);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-privacy .prv-chapter__body a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 分类条目：细边框强调 */
.page-privacy .prv-entry {
  margin: 20px 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--steel);
  transition: border-color 0.24s ease;
}

.page-privacy .prv-entry:hover {
  border-left-color: var(--cyan);
}

.page-privacy .prv-entry__title {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
}

.page-privacy .prv-entry p {
  margin: 0;
}

/* 列表 */
.page-privacy .prv-list {
  list-style: none;
  margin: 18px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-privacy .prv-list li {
  position: relative;
  padding-left: 20px;
  color: var(--prv-text);
  line-height: 1.75;
}

.page-privacy .prv-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--amber);
}

/* 提示条 */
.page-privacy .prv-callout {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid var(--steel);
  border-left: 3px solid var(--amber);
  background: var(--cab);
}

.page-privacy .prv-callout__title {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-privacy .prv-callout p {
  margin: 0;
  color: var(--prv-text);
  line-height: 1.75;
}

/* 折叠细节 */
.page-privacy .prv-fold {
  margin: 22px 0 0;
  border: 1px solid var(--steel);
  background: var(--prv-panel);
}

.page-privacy .prv-fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  cursor: pointer;
  font-size: 15px;
  color: var(--white);
  list-style: none;
}

.page-privacy .prv-fold summary::-webkit-details-marker {
  display: none;
}

.page-privacy .prv-fold summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--amber);
}

.page-privacy .prv-fold[open] summary::before {
  content: "−";
  color: var(--cyan);
}

.page-privacy .prv-fold p {
  margin: 0;
  padding: 0 18px 16px;
  color: var(--prv-text);
  border-top: 1px solid var(--prv-rule);
  padding-top: 14px;
}

/* 回到顶部 */
.page-privacy .prv-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border: 1px solid var(--steel);
  background: var(--cab);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.page-privacy .prv-top:hover,
.page-privacy .prv-top:focus-visible {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}

@media (max-width: 640px) {
  .page-privacy .prv-chapter__head {
    flex-direction: column;
    gap: 6px;
  }

  .page-privacy .prv-callout,
  .page-privacy .prv-fold {
    margin-left: 0;
    margin-right: 0;
  }

  .page-privacy .prv-top {
    font-size: 12px;
    padding: 9px 12px;
  }
}

@media (min-width: 1000px) {
  .page-privacy .prv-hero__sidenote {
    display: block;
    position: absolute;
    right: 0;
    top: 4px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    color: var(--mist-dim);
  }

  .page-privacy .prv-body__grid {
    grid-template-columns: minmax(190px, 240px) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-privacy .prv-index {
    position: sticky;
    top: 108px;
    padding-left: 16px;
    border-left: 2px solid var(--steel);
  }

  .page-privacy .prv-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-privacy .prv-index__item {
    flex: 1 1 auto;
  }

  .page-privacy .prv-index__link {
    display: flex;
    width: 100%;
    padding: 11px 0;
    border: 0;
    border-bottom: 1px solid var(--prv-rule);
    background: none;
    white-space: normal;
  }

  .page-privacy .prv-index__link:hover,
  .page-privacy .prv-index__link:focus-visible {
    background: none;
    border-bottom-color: var(--amber);
    color: var(--white);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .prv-index__link,
  .page-privacy .prv-entry,
  .page-privacy .prv-top,
  .page-privacy .prv-chapter__body a {
    transition: none;
  }
}