.page-privacy {
  --pp-measure: 38em;
  --pp-gap: 28px;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 顶部起始标记 ---------- */
.page-privacy .privacy-topline {
  height: 12px;
  margin: 0 0 clamp(24px, 4vw, 44px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-image: conic-gradient(var(--red) 0 25%, var(--white) 0 50%, var(--red) 0 75%, var(--white) 0);
  background-size: 24px 24px;
  background-position: left top;
  opacity: .9;
}

/* ---------- 页首说明 ---------- */
.page-privacy .privacy-lead {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-privacy .privacy-lead h1 {
  margin: 12px 0 18px;
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.page-privacy .privacy-lead__text {
  margin: 0;
  max-width: 38rem;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.75;
  color: var(--stone);
}

.page-privacy .privacy-lead__text a,
.page-privacy .clause a,
.page-privacy .privacy-foot a {
  color: var(--cyan-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-privacy .privacy-lead__text a:hover,
.page-privacy .privacy-lead__text a:focus-visible,
.page-privacy .clause a:hover,
.page-privacy .clause a:focus-visible,
.page-privacy .privacy-foot a:hover,
.page-privacy .privacy-foot a:focus-visible {
  color: var(--red);
  border-color: var(--red);
}

/* ---------- 顶部横幅 ---------- */
.page-privacy .privacy-banner {
  display: block;
  margin: 0 0 clamp(32px, 5vw, 60px);
  aspect-ratio: 14 / 5;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-dark);
}

.page-privacy .privacy-banner img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 版式骨架 ---------- */
.page-privacy .privacy-layout {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

/* ---------- 条款索引 ---------- */
.page-privacy .privacy-index {
  align-self: start;
}

.page-privacy .privacy-index__list {
  display: flex;
  gap: 6px;
  margin: 0 0 10px;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-privacy .privacy-index__list li {
  flex: 0 0 auto;
}

.page-privacy .privacy-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--stone);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  transition: background-color .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-privacy .privacy-index__list a:hover,
.page-privacy .privacy-index__list a:focus-visible {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}

.page-privacy .privacy-index__list .num {
  font-family: var(--font-num);
  font-size: 19px;
  line-height: 1;
  color: var(--red);
  transition: color .24s var(--ease);
}

.page-privacy .privacy-index__list a:hover .num,
.page-privacy .privacy-index__list a:focus-visible .num {
  color: var(--cyan);
}

.page-privacy .privacy-index__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 条款正文 ---------- */
.page-privacy .clause {
  padding-top: clamp(24px, 3.4vw, 36px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-privacy .clause:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-privacy .clause h2 {
  margin: 8px 0 16px;
  font-size: clamp(19px, 2.5vw, 25px);
  line-height: 1.42;
  letter-spacing: -0.01em;
  font-weight: 500;
  color: var(--navy);
  max-width: 34em;
}

.page-privacy .clause + .clause {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-privacy .clause p {
  max-width: var(--pp-measure);
  margin: 0 0 var(--pp-gap);
  font-size: 16px;
  line-height: 1.75;
  color: var(--stone);
}

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

.page-privacy .clause .key {
  margin: 0 0 var(--pp-gap);
  padding-left: 16px;
  border-left: 2px solid var(--red);
  color: var(--navy);
  font-weight: 500;
}

/* ---------- 折叠补充 ---------- */
.page-privacy .more {
  max-width: var(--pp-measure);
  margin: 0 0 var(--pp-gap);
  border-bottom: 1px solid var(--line);
}

.page-privacy .more > summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-dark);
  transition: color .22s var(--ease);
}

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

.page-privacy .more > summary::before {
  content: "+";
  display: inline-block;
  width: 1em;
  font-size: 15px;
  line-height: 1;
  color: var(--red);
}

.page-privacy .more[open] > summary::before {
  content: "\2212";
}

.page-privacy .more > summary:hover,
.page-privacy .more > summary:focus-visible {
  color: var(--red);
}

.page-privacy .more__body {
  padding: 4px 0 18px;
}

.page-privacy .more__body p {
  max-width: var(--pp-measure);
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 页尾说明 ---------- */
.page-privacy .privacy-foot {
  max-width: var(--pp-measure);
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 桌面端：右栏固定索引 ---------- */
@media (min-width: 1024px) {
  .page-privacy .privacy-layout {
    grid-template-columns: minmax(0, 1fr) 13.5rem;
    column-gap: clamp(40px, 6vw, 88px);
    row-gap: 0;
  }

  .page-privacy .privacy-body {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .page-privacy .privacy-index {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: calc(var(--bar-h) + 28px);
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }

  .page-privacy .privacy-index__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    margin-bottom: 14px;
    overflow: visible;
  }

  .page-privacy .privacy-index__list li {
    flex: 1 1 auto;
  }

  .page-privacy .privacy-index__list a {
    justify-content: flex-start;
    width: 100%;
    padding: 11px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: transparent;
  }

  .page-privacy .privacy-index__list a:hover,
  .page-privacy .privacy-index__list a:focus-visible {
    background: transparent;
    color: var(--red);
  }

  .page-privacy .privacy-index__list a:hover .num,
  .page-privacy .privacy-index__list a:focus-visible .num {
    color: var(--red);
  }
}

/* ---------- 宽屏阅读节奏 ---------- */
@media (min-width: 1360px) {
  .page-privacy .privacy-lead {
    max-width: 50rem;
  }

  .page-privacy .clause p {
    margin-bottom: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .privacy-index__list a,
  .page-privacy .privacy-index__list .num,
  .page-privacy .more > summary,
  .page-privacy .privacy-lead__text a,
  .page-privacy .clause a,
  .page-privacy .privacy-foot a {
    transition: none;
  }
}
<<<END>>>