.page-privacy {
  --pv-gap: clamp(18px, 3vw, 34px);
  --pv-rail: 236px;
  position: relative;
  padding-block: clamp(20px, 4vw, 44px) clamp(56px, 8vw, 104px);
  background:
    radial-gradient(1080px 520px at 10% -10%, rgba(59, 130, 246, 0.18), transparent 62%),
    radial-gradient(720px 420px at 98% 4%, rgba(57, 255, 136, 0.09), transparent 68%),
    var(--ink-900);
  color: var(--text);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-privacy h2,
.page-privacy h3 {
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-privacy .pv-lead {
  max-width: 62ch;
  margin: 12px 0 0;
  color: var(--text-dim);
  line-height: 1.8;
}

.page-privacy .pv-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}

/* 首屏 */
.page-privacy .pv-hero {
  display: grid;
  gap: var(--pv-gap);
  margin-top: clamp(16px, 3vw, 30px);
  padding-bottom: clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.page-privacy .pv-hero__body h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-privacy .pv-hero__lead {
  max-width: 54ch;
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.page-privacy .pv-hero__facts {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-privacy .pv-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(135deg, rgba(22, 36, 77, 0.82), rgba(16, 27, 58, 0.7));
  font-size: 14px;
  line-height: 1.5;
}

.page-privacy .pv-hero__facts .mono {
  color: var(--neon);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-privacy .pv-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow);
}

.page-privacy .pv-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 17, 40, 0.1) 40%, rgba(10, 17, 40, 0.78) 100%);
  pointer-events: none;
}

.page-privacy .pv-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* 文档式两栏 */
.page-privacy .pv-doc {
  margin-top: clamp(24px, 4vw, 46px);
}

.page-privacy .pv-nav-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-privacy .section-nav__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-privacy .section-nav__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-privacy .section-nav__link .mono {
  color: var(--mute);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-privacy .section-nav__link:hover,
.page-privacy .section-nav__link:focus-visible {
  color: var(--white);
  border-left-color: var(--line-strong);
}

.page-privacy .section-nav__link[aria-current="true"] {
  color: var(--white);
  border-left-color: var(--neon);
  background: linear-gradient(90deg, var(--neon-dim), rgba(57, 255, 136, 0));
}

.page-privacy .section-nav__link[aria-current="true"] .mono {
  color: var(--neon);
}

.page-privacy .pv-top {
  margin-top: 16px;
}

/* 章节 */
.page-privacy .pv-sec {
  scroll-margin-top: calc(var(--hdr-h) + 26px);
  padding-top: clamp(30px, 5vw, 52px);
}

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

.page-privacy .pv-sec .section__head h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 800;
}

.page-privacy .pv-sec .section__head .eyebrow {
  color: var(--neon);
}

/* 条目列表 */
.page-privacy .pv-list {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-privacy .pv-list > li {
  position: relative;
  padding: 18px 0 18px 22px;
  border-bottom: 1px solid var(--line);
}

.page-privacy .pv-list > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px var(--neon-dim);
}

.page-privacy .pv-list--plain > li::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--orange-dim);
}

.page-privacy .pv-list h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.page-privacy .pv-list p {
  margin: 0;
  max-width: 68ch;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
}

/* 用途卡片：错落排布 */
.page-privacy .pv-uses {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-privacy .pv-use {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  background: linear-gradient(160deg, rgba(22, 36, 77, 0.9), rgba(10, 17, 40, 0.85));
  box-shadow: var(--shadow);
}

.page-privacy .pv-use h3 {
  margin: 12px 0 8px;
  font-size: 16px;
  line-height: 1.45;
}

.page-privacy .pv-use p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.8;
}

/* 数据流向 */
.page-privacy .pv-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: pvflow;
}

.page-privacy .pv-flow__step {
  flex: 1 1 140px;
  position: relative;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-m);
  background: linear-gradient(180deg, rgba(22, 36, 77, 0.95), rgba(15, 42, 46, 0.85));
  font-size: 13.5px;
  color: var(--white);
}

.page-privacy .pv-flow__step .mono {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-privacy .pv-flow__step::after {
  content: "";
  position: absolute;
  right: -9px;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--line-strong);
}

.page-privacy .pv-flow__step:last-child::after {
  display: none;
}

/* 折叠条目 */
.page-privacy .pv-acc {
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
}

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

.page-privacy .pv-acc__item summary {
  position: relative;
  padding: 16px 34px 16px 0;
  color: var(--white);
  font-size: 15.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.page-privacy .pv-acc__item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 18px;
  color: var(--neon);
  transition: transform 0.25s var(--ease);
}

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

.page-privacy .pv-acc__item summary:hover {
  color: var(--neon);
}

.page-privacy .pv-acc__item p {
  margin: 0 0 18px;
  padding-left: 16px;
  border-left: 2px solid var(--neon-dim);
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.85;
}

/* 修订记录 */
.page-privacy .pv-timeline {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-privacy .pv-timeline__item {
  padding: 18px;
  border-left: 3px solid var(--elec);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  background: linear-gradient(90deg, var(--elec-dim), rgba(16, 27, 58, 0.6) 72%);
}

.page-privacy .pv-timeline__item:nth-child(2) {
  border-left-color: var(--neon);
  background: linear-gradient(90deg, var(--neon-dim), rgba(16, 27, 58, 0.6) 72%);
}

.page-privacy .pv-timeline__item:nth-child(3) {
  border-left-color: var(--orange);
  background: linear-gradient(90deg, var(--orange-dim), rgba(16, 27, 58, 0.6) 72%);
}

.page-privacy .pv-timeline__idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-privacy .pv-timeline__item h3 {
  margin: 8px 0 6px;
  font-size: 15.5px;
}

.page-privacy .pv-timeline__item p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.8;
}

/* 联系方式 */
.page-privacy .pv-contact {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-l);
  background: linear-gradient(140deg, rgba(22, 36, 77, 0.95), rgba(15, 42, 46, 0.9));
}

.page-privacy .pv-contact__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

.page-privacy .pv-contact__mail {
  margin: 8px 0 0;
  font-size: clamp(17px, 2.6vw, 22px);
  font-weight: 700;
  color: var(--neon);
  word-break: break-all;
}

.page-privacy .pv-contact__desc {
  margin: 10px 0 0;
  max-width: 56ch;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

.page-privacy .pv-copy-status {
  margin: 0;
  min-height: 1.2em;
  font-size: 13px;
  color: var(--orange);
}

.page-privacy .pv-related {
  margin: 22px 0 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.9;
}

.page-privacy .pv-related a {
  color: var(--elec);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 130, 246, 0.5);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

@media (min-width: 620px) {
  .page-privacy .pv-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-privacy .pv-hero__facts li {
    flex-direction: column;
    gap: 8px;
  }

  .page-privacy .pv-uses {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-privacy .pv-use:nth-child(2n) {
    transform: translateY(14px);
  }

  .page-privacy .pv-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-privacy .pv-contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-privacy .pv-copy-status {
    grid-column: 1 / -1;
  }
}

@media (min-width: 980px) {
  .page-privacy .pv-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-privacy .pv-hero__media {
    transform: rotate(-1.1deg) translateY(-6px);
  }

  .page-privacy .pv-doc {
    grid-template-columns: var(--pv-rail) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
    align-items: start;
  }

  .page-privacy .pv-doc .with-rail__aside {
    position: sticky;
    top: calc(var(--hdr-h) + 22px);
    align-self: start;
  }

  .page-privacy .pv-list > li {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 0 26px;
    align-items: start;
  }

  .page-privacy .pv-list h3 {
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .pv-hero__media,
  .page-privacy .pv-use:nth-child(2n) {
    transform: none;
  }
}