.page-privacy {
  --pv-read: 70ch;
  --pv-rule: 1px solid var(--line);
  position: relative;
  overflow-x: clip;
  padding: 0 0 clamp(60px, 8vw, 110px);
  color: var(--paper);
  background-image:
    radial-gradient(56% 42% at 8% -2%, rgba(160, 107, 255, 0.12), transparent 68%),
    radial-gradient(48% 38% at 96% 6%, rgba(63, 224, 208, 0.08), transparent 70%);
  background-repeat: no-repeat;
}

.page-privacy .pv-shell {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 48px);
}

/* ---------- 面包屑 ---------- */
.page-privacy .pv-crumb {
  padding-top: clamp(20px, 3vw, 34px);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */
.page-privacy .pv-hero {
  padding-top: clamp(16px, 2.6vw, 28px);
}

.page-privacy .pv-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--violet);
}

.page-privacy .pv-eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--violet);
  flex: 0 0 auto;
}

.page-privacy .pv-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-privacy .pv-lede {
  max-width: 58ch;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.82;
  color: var(--muted);
}

.page-privacy .pv-hero__media {
  position: relative;
  margin: clamp(28px, 4vw, 44px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg) var(--r-organic) var(--r-lg) var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-privacy .pv-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-privacy .pv-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(118deg, rgba(7, 8, 13, 0.74) 0%, rgba(7, 8, 13, 0.16) 46%, rgba(63, 224, 208, 0.16) 100%);
}

/* ---------- 章节索引 ---------- */
.page-privacy .pv-index {
  margin-top: clamp(34px, 5vw, 56px);
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: var(--pv-rule);
  border-bottom: var(--pv-rule);
}

.page-privacy .pv-index__label {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 12.5px;
  letter-spacing: 0.26em;
  color: var(--muted);
}

.page-privacy .pv-index__list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px 26px;
  margin: 0;
  padding: 0;
}

.page-privacy .pv-index__item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 3px;
  font-size: 14.5px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-privacy .pv-index__item a:hover,
.page-privacy .pv-index__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-privacy .pv-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--violet);
}

/* ---------- 文档主体 ---------- */
.page-privacy .pv-doc {
  margin-top: clamp(26px, 3.6vw, 42px);
}

.page-privacy .pv-chapter {
  padding: clamp(30px, 4.4vw, 52px) 0;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-privacy .pv-chapter + .pv-chapter {
  border-top: var(--pv-rule);
}

.page-privacy .pv-chapter__num {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(14px, 1.8vw, 20px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-privacy .pv-chapter__num span {
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-weight: 500;
  transition: border-color 220ms var(--ease), color 220ms var(--ease);
}

.page-privacy .pv-chapter__num::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--line);
}

.page-privacy .pv-chapter:target .pv-chapter__num span {
  border-left-color: var(--violet);
  color: var(--violet);
}

.page-privacy .pv-chapter h2 {
  margin: 0 0 clamp(16px, 2vw, 24px);
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-privacy .pv-prose {
  max-width: var(--pv-read);
}

.page-privacy .pv-prose p {
  margin: 0 0 1.15em;
  font-size: 16.5px;
  line-height: 1.82;
}

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

/* ---------- 条目 ---------- */
.page-privacy .pv-items {
  list-style: none;
  display: grid;
  gap: clamp(18px, 2.2vw, 26px);
  max-width: var(--pv-read);
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
}

.page-privacy .pv-item {
  position: relative;
  padding-left: 22px;
}

.page-privacy .pv-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.85;
}

.page-privacy .pv-item__k {
  margin: 0 0 5px;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-privacy .pv-item__v {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 旁注与等宽强调 ---------- */
.page-privacy .pv-note {
  max-width: 64ch;
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--clay);
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-privacy .pv-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.4);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-privacy .pv-note a:hover,
.page-privacy .pv-note a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--violet);
}

.page-privacy .pv-code {
  font-family: var(--font-mono);
  font-size: 0.93em;
  letter-spacing: 0.01em;
  color: var(--cyan);
  background: rgba(63, 224, 208, 0.1);
  border-radius: 5px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ---------- 术语旁注 ---------- */
.page-privacy .pv-term {
  position: relative;
  border-bottom: 1px dashed var(--muted);
  cursor: help;
  border-radius: 2px;
}

.page-privacy .pv-term:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-privacy .pv-term__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  width: max-content;
  max-width: min(300px, 76vw);
  padding: 10px 12px;
  z-index: 6;
  pointer-events: none;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: #0E1A2B;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: 0;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 170ms var(--ease), transform 170ms var(--ease), visibility 170ms linear;
}

.page-privacy .pv-term:hover .pv-term__tip,
.page-privacy .pv-term:focus .pv-term__tip,
.page-privacy .pv-term:focus-within .pv-term__tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 折叠细节 ---------- */
.page-privacy .pv-fold {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(14, 26, 43, 0.5);
  transition: border-color 220ms var(--ease);
}

.page-privacy .pv-fold[open] {
  border-color: rgba(160, 107, 255, 0.55);
}

.page-privacy .pv-fold__sum {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  transition: color 180ms var(--ease);
}

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

.page-privacy .pv-fold__sum::before {
  content: "+";
  flex: 0 0 auto;
  width: 14px;
  text-align: center;
  font-size: 16px;
  line-height: 1;
  color: var(--violet);
}

.page-privacy .pv-fold[open] .pv-fold__sum::before {
  content: "\2212";
}

.page-privacy .pv-fold__sum:hover,
.page-privacy .pv-fold__sum:focus-visible {
  color: var(--paper);
}

.page-privacy .pv-fold__body {
  padding: 0 16px 16px 40px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-privacy .pv-fold__body ul {
  margin: 0;
  padding-left: 16px;
}

.page-privacy .pv-fold__body li {
  margin-bottom: 5px;
}

.page-privacy .pv-fold__body p {
  margin: 0;
}

/* ---------- 数据流向图 ---------- */
.page-privacy .pv-flow {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
  margin: clamp(24px, 3vw, 36px) 0 0;
}

.page-privacy .pv-flow__box {
  fill: rgba(14, 26, 43, 0.92);
  stroke: #2A2F3A;
  stroke-width: 1;
}

.page-privacy .pv-flow__box--accent {
  stroke: #3FE0D0;
}

.page-privacy .pv-flow__t {
  fill: #F2EFE6;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-privacy .pv-flow__s {
  fill: #8C97A8;
  font-family: var(--font-body);
  font-size: 10.5px;
}

.page-privacy .pv-flow__wire {
  fill: none;
  stroke: #A06BFF;
  stroke-width: 1.4;
  stroke-dasharray: 5 5;
  opacity: 0.8;
}

.page-privacy .pv-flow__dot {
  fill: #3FE0D0;
}

/* ---------- 回到顶部 ---------- */
.page-privacy .pv-backtop {
  position: fixed;
  right: clamp(14px, 2.6vw, 30px);
  bottom: clamp(14px, 2.6vw, 30px);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 8, 13, 0.88);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease), transform 200ms var(--ease);
}

.page-privacy .pv-backtop::before {
  content: "\2191";
  font-size: 13px;
  color: var(--cyan);
}

.page-privacy .pv-backtop:hover,
.page-privacy .pv-backtop:focus-visible {
  border-color: var(--violet);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-privacy .pv-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-privacy .pv-chapter {
    padding-right: clamp(0px, 6vw, 96px);
  }
}

@media (max-width: 520px) {
  .page-privacy .pv-chapter__num {
    font-size: 11.5px;
    letter-spacing: 0.18em;
  }

  .page-privacy .pv-item {
    padding-left: 18px;
  }

  .page-privacy .pv-fold__body {
    padding-left: 16px;
  }

  .page-privacy .pv-backtop {
    font-size: 12px;
    padding: 9px 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy *,
  .page-privacy *::before,
  .page-privacy *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}