.page-privacy {
  --read: 44ch;
  --num-col: 76px;
  --num-gap: 26px;
  padding: clamp(20px, 4vw, 42px) 0 clamp(56px, 8vw, 112px);
  background-image: radial-gradient(120% 52% at 50% -8%, rgba(47, 216, 208, 0.07), transparent 62%);
  background-repeat: no-repeat;
}

.page-privacy .doc-shell {
  max-width: 880px;
  margin: 0 auto;
}

/* 页首 */
.page-privacy .doc-head {
  padding: clamp(18px, 3vw, 32px) 0 clamp(22px, 3vw, 34px);
  border-bottom: 2px solid var(--line);
}

.page-privacy .doc-head .eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-privacy .doc-head h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--sans);
  font-size: clamp(28px, 7vw, 54px);
  font-weight: 900;
  font-stretch: 87%;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-privacy .doc-lede {
  margin: 20px 0 0;
  max-width: var(--read);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-privacy .doc-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-privacy .doc-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background: var(--surface);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-privacy .fact-k {
  color: var(--ink-2);
}

.page-privacy .fact-v {
  color: var(--cyan);
}

/* 章节索引 */
.page-privacy .doc-toc {
  position: sticky;
  top: calc(var(--mast-h) + 2px);
  z-index: 6;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 10px 0;
  background: rgba(7, 15, 26, 0.94);
  border-bottom: 2px solid var(--line);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-privacy .doc-toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-privacy .doc-toc-list::-webkit-scrollbar {
  display: none;
}

.page-privacy .doc-toc-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 7px 12px;
  border: 2px solid var(--line);
  color: var(--ink-2);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-privacy .doc-toc-link:hover,
.page-privacy .doc-toc-link:focus-visible {
  border-color: var(--cyan);
  background: rgba(47, 216, 208, 0.08);
  color: var(--ink);
}

.page-privacy .toc-num {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

/* 章节骨架 */
.page-privacy .doc-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: clamp(26px, 4vw, 40px) 0;
  border-bottom: 2px solid var(--line);
  scroll-margin-top: calc(var(--mast-h) + 74px);
}

.page-privacy .sec-num {
  width: 46px;
  padding-top: 7px;
  border-top: 2px solid var(--orange);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-privacy .sec-body h2 {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(22px, 4.6vw, 32px);
  font-weight: 900;
  font-stretch: 87%;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-privacy .sec-lede,
.page-privacy .sec-body p {
  margin: 14px 0 0;
  max-width: var(--read);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-privacy .sec-lede {
  margin-top: 12px;
  color: var(--ink-2);
}

.page-privacy .sec-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* 四类信息 */
.page-privacy .info-list {
  display: grid;
  gap: 18px;
  margin: 22px 0 0;
}

.page-privacy .info-item {
  max-width: var(--read);
  padding-left: 16px;
  border-left: 3px solid var(--line);
  transition: border-color 0.18s var(--ease);
}

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

.page-privacy .info-item dt {
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-privacy .info-item dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink-2);
}

/* 用途列表 */
.page-privacy .use-list {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: use;
}

.page-privacy .use-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  max-width: var(--read);
  counter-increment: use;
}

.page-privacy .use-item::before {
  content: "0" counter(use);
  padding-top: 3px;
  border-top: 2px solid var(--orange);
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-privacy .use-title {
  display: block;
  margin-bottom: 5px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-privacy .use-item p {
  margin: 0;
  max-width: none;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* 中段信息图 */
.page-privacy .doc-figure {
  max-width: 100%;
  margin: clamp(26px, 4vw, 44px) 0;
}

.page-privacy .doc-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 数据条 */
.page-privacy .stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  max-width: var(--read);
}

.page-privacy .stat {
  padding: 16px 16px 14px;
  border: 2px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.page-privacy .stat-num {
  display: block;
  font-family: var(--mono);
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-privacy .stat-unit {
  margin-left: 3px;
  font-size: 13px;
  color: var(--orange);
}

.page-privacy .stat-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* 折叠请求组 */
.page-privacy .accordion {
  max-width: var(--read);
  margin: 22px 0 0;
}

/* 版本时间线 */
.page-privacy .timeline {
  max-width: var(--read);
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-privacy .tl-item {
  position: relative;
  padding: 0 0 22px 26px;
  border-left: 2px solid var(--line);
}

.page-privacy .tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-privacy .tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--bg);
  border: 2px solid var(--orange);
}

.page-privacy .tl-item:last-child::before {
  border-color: var(--lime);
}

.page-privacy .tl-node {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-privacy .tl-text {
  margin: 0;
  max-width: none;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-2);
}

/* 延伸入口 */
.page-privacy .next-links {
  display: grid;
  gap: 14px;
  margin-top: clamp(30px, 5vw, 48px);
}

.page-privacy .next-link {
  display: block;
  padding: 20px 20px 18px;
  border: 2px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-privacy .next-link:hover,
.page-privacy .next-link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
}

.page-privacy .next-link-tag {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-privacy .next-link-title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-privacy .next-link-desc {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* 回到页首 */
.page-privacy .to-top {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 13px;
  border: 2px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

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

@media (min-width: 860px) {
  .page-privacy .doc-section {
    grid-template-columns: var(--num-col) minmax(0, 1fr);
    gap: var(--num-gap);
    align-items: start;
  }

  .page-privacy .sec-num {
    position: relative;
    width: auto;
    padding-top: 0;
    border-top: 0;
    font-size: 44px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: rgba(47, 216, 208, 0.3);
  }

  .page-privacy .sec-num::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -12px;
    width: 34px;
    height: 3px;
    background: var(--orange);
  }

  .page-privacy .doc-figure {
    margin-left: calc(var(--num-col) + var(--num-gap));
  }

  .page-privacy .next-links {
    grid-template-columns: 1fr 1fr;
  }

  .page-privacy .next-links,
  .page-privacy .doc-figure {
    margin-left: 0;
  }
}

@media (min-width: 860px) {
  .page-privacy .next-links {
    margin-left: calc(var(--num-col) + var(--num-gap));
  }
}

@media (min-width: 1080px) {
  .page-privacy .doc-shell {
    max-width: 940px;
  }

  .page-privacy .doc-head h1 {
    max-width: 22ch;
  }
}

@media (max-width: 480px) {
  .page-privacy .stat-strip {
    grid-template-columns: 1fr;
  }

  .page-privacy .use-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-privacy .stat-num {
    font-size: 28px;
  }

  .page-privacy .to-top {
    right: 12px;
    bottom: 12px;
    padding: 9px 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .next-link,
  .page-privacy .to-top,
  .page-privacy .doc-toc-link,
  .page-privacy .info-item {
    transition: none;
  }

  .page-privacy .next-link:hover,
  .page-privacy .next-link:focus-visible {
    transform: none;
  }
}