.page-privacy {
  --doc-w: 720px;
  --toc-w: 190px;
}

.page-privacy .privacy-hero {
  position: relative;
  overflow: hidden;
  background: var(--night);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(28px, 5vw, 56px) clamp(40px, 6vw, 84px);
}

.page-privacy .privacy-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-privacy .privacy-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(0.75);
}

.page-privacy .privacy-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(11, 18, 15, 0.5) 0%, rgba(11, 18, 15, 0.86) 62%, var(--bg) 100%);
  pointer-events: none;
}

.page-privacy .privacy-hero__inner {
  position: relative;
  z-index: 2;
}

.page-privacy .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-privacy .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-privacy .breadcrumb a:hover,
.page-privacy .breadcrumb a:focus-visible {
  color: var(--teal);
}

.page-privacy .privacy-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 7.5vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--ink);
}

.page-privacy .privacy-hero .lead {
  max-width: 60ch;
  margin-top: clamp(16px, 2.4vw, 26px);
  color: var(--muted);
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
}

.page-privacy .doc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  padding-block: clamp(34px, 5vw, 64px) clamp(64px, 9vw, 128px);
  min-width: 0;
}

.page-privacy .doc__body {
  min-width: 0;
}

/* ---------- 目录 ---------- */

.page-privacy .toc__title {
  display: none;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}

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

.page-privacy .toc__list::-webkit-scrollbar {
  display: none;
}

.page-privacy .toc__link {
  display: block;
  white-space: nowrap;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-privacy .toc__link:hover,
.page-privacy .toc__link:focus-visible {
  color: var(--ink);
  border-color: #3A4C43;
}

/* ---------- 章节 ---------- */

.page-privacy [id^="sec-"] {
  scroll-margin-top: 104px;
}

.page-privacy .clause-block + .clause-block {
  margin-top: clamp(52px, 7.5vw, 100px);
}

.page-privacy .clause-block h2 {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 32px);
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--ink);
}

.page-privacy .clause-block__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal);
  flex: none;
}

.page-privacy .clause-block > p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 分类清单 ---------- */

.page-privacy .fact-list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  max-width: 66ch;
}

.page-privacy .fact-list > li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-privacy .fact-list > li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-privacy .fact-list__no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 5px;
}

.page-privacy .fact-list h3 {
  margin: 0 0 7px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.page-privacy .fact-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-privacy .keyline {
  border-left: 3px solid var(--lime);
  padding: 2px 0 2px 18px;
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 用途条目 ---------- */

.page-privacy .use-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  max-width: 66ch;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-privacy .use-list > li {
  background: var(--panel);
  padding: 18px 20px;
}

.page-privacy .use-list__key {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 8px;
}

.page-privacy .use-list p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 本地偏好演示 ---------- */

.page-privacy .pref-demo {
  margin-top: 30px;
  max-width: 66ch;
  padding: 20px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-privacy .pref-demo__lead {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-privacy .pref-demo .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-privacy .pref-demo .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-privacy .pref-demo .filter-btn:hover,
.page-privacy .pref-demo .filter-btn:focus-visible {
  color: var(--ink);
  border-color: #3A4C43;
}

.page-privacy .pref-demo .filter-btn[aria-pressed="true"],
.page-privacy .pref-demo .filter-btn.is-active {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--on-lime);
}

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

.page-privacy .pref-demo__list > li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--raise);
  border: 1px solid transparent;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.page-privacy .pref-demo__list > li.is-hidden {
  display: none;
}

.page-privacy .pref-demo__list > li.is-in {
  opacity: 0;
  transform: translateY(4px);
}

.page-privacy .pref-demo__key {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--teal);
  flex: none;
  min-width: 48px;
}

.page-privacy .pref-demo__val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-privacy .pref-demo .note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 折叠条款 ---------- */

.page-privacy .clauses {
  max-width: 66ch;
  border-top: 1px solid var(--line);
}

.page-privacy .clause {
  border-bottom: 1px solid var(--line);
}

.page-privacy .clause summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink);
  transition: color 0.18s ease;
}

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

.page-privacy .clause summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--teal);
  transition: transform 0.18s ease;
}

.page-privacy .clause[open] summary::after {
  content: "−";
}

.page-privacy .clause summary:hover,
.page-privacy .clause summary:focus-visible {
  color: var(--teal);
}

.page-privacy .clause__body {
  padding: 0 0 20px;
}

.page-privacy .clause__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 底部动作 ---------- */

.page-privacy .link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-privacy .link-row .btn {
  text-decoration: none;
}

/* ---------- 桌面端 ---------- */

@media (min-width: 1000px) {
  .page-privacy .doc {
    grid-template-columns: var(--toc-w) minmax(0, var(--doc-w));
    justify-content: center;
    gap: clamp(48px, 6vw, 96px);
    padding-block: clamp(56px, 6vw, 88px) clamp(80px, 8vw, 132px);
  }

  .page-privacy .doc__toc {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-privacy .toc__title {
    display: block;
  }

  .page-privacy .toc__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-privacy .toc__list > li + li {
    margin-top: 2px;
  }

  .page-privacy .toc__link {
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 8px 0 8px 14px;
    font-size: 12.5px;
    line-height: 1.5;
  }

  .page-privacy .toc__link:hover,
  .page-privacy .toc__link:focus-visible {
    border-color: #3A4C43;
  }

  .page-privacy .toc__link[aria-current="true"] {
    color: var(--teal);
    border-left-color: var(--teal);
  }
}

@media (min-width: 1320px) {
  .page-privacy .privacy-hero__inner {
    padding-right: 12%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .toc__link,
  .page-privacy .clause summary,
  .page-privacy .clause summary::after,
  .page-privacy .pref-demo .filter-btn,
  .page-privacy .pref-demo__list > li {
    transition: none;
  }

  .page-privacy .pref-demo__list > li.is-in {
    opacity: 1;
    transform: none;
  }
}