.page-privacy {
  --priv-measure: 34em;
  --priv-rail-w: 64px;
  background: var(--ink-900);
  color: var(--text-100);
}

.page-privacy img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

.page-privacy a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-privacy a:focus-visible,
.page-privacy summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* 面包屑 */
.page-privacy .breadcrumb {
  padding-block: 18px 6px;
}

.page-privacy .breadcrumb a {
  color: var(--text-300);
}

.page-privacy .breadcrumb li:last-child,
.page-privacy .breadcrumb [aria-current="page"] {
  color: var(--text-100);
}

/* 首屏 */
.page-privacy .priv-hero {
  background:
    radial-gradient(120% 150% at 88% -30%, rgba(0, 229, 208, 0.12), transparent 62%),
    radial-gradient(90% 120% at 4% 0%, rgba(255, 122, 47, 0.09), transparent 56%),
    var(--ink-900);
  border-bottom: 1px solid var(--line-500);
}

.page-privacy .priv-hero__inner {
  padding-block: clamp(30px, 6vw, 76px) clamp(32px, 5vw, 64px);
}

.page-privacy .priv-hero .eyebrow {
  display: block;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-privacy .priv-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 7.2vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 15em;
  color: var(--text-100);
}

.page-privacy .priv-hero__lead {
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--text-300);
  max-width: 40em;
  margin: 0 0 22px;
}

.page-privacy .priv-hero__meta {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--text-300);
  border-top: 1px solid var(--line-500);
  padding-top: 10px;
}

/* 摘要卡 */
.page-privacy .priv-summary__grid {
  display: grid;
  gap: 0;
  padding-block: clamp(24px, 4vw, 44px);
}

.page-privacy .priv-summary__card {
  background: var(--paper-200);
  color: var(--paper-ink);
  padding: clamp(20px, 4vw, 40px);
  border-left: 3px solid var(--orange);
}

.page-privacy .priv-summary__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-22);
  letter-spacing: 0.02em;
  margin: 0 0 20px;
  color: var(--paper-ink);
}

.page-privacy .priv-summary__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-privacy .priv-summary__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-privacy .priv-summary__idx {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--paper-ink);
  opacity: 0.55;
  padding-top: 4px;
}

.page-privacy .priv-summary__list p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-privacy .priv-summary__fig {
  margin: 0;
  background: var(--ink-800);
  border: 1px solid var(--line-500);
  border-top: 0;
}

.page-privacy .priv-summary__fig img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1200 / 700;
  object-fit: cover;
}

/* 正文骨架 */
.page-privacy .priv-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: clamp(32px, 5vw, 72px);
}

.page-privacy .priv-flow {
  min-width: 0;
  border-top: 1px solid var(--line-500);
}

/* 左侧刻度轨 */
.page-privacy .priv-rail {
  display: none;
}

.page-privacy .priv-rail__list {
  list-style: none;
  margin: 0;
  padding: 18px 0 18px 18px;
  display: grid;
  gap: 18px;
}

.page-privacy .priv-rail__tick {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-300);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-privacy .priv-rail__tick:hover,
.page-privacy .priv-rail__tick:focus-visible {
  color: var(--cyan);
  text-decoration: none;
}

/* 章节 */
.page-privacy .priv-sec {
  display: grid;
  gap: 10px;
  padding-block: clamp(28px, 5vw, 60px);
  border-bottom: 1px solid var(--line-500);
}

.page-privacy .priv-sec__body {
  min-width: 0;
  max-width: var(--priv-measure);
}

.page-privacy .priv-sec__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-100);
  margin: 0 0 12px;
}

.page-privacy .priv-sec__body p {
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--text-100);
  margin: 0 0 1em;
}

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

.page-privacy .priv-sec__meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  order: -1;
}

.page-privacy .priv-sec__num {
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--line-500);
  display: block;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-privacy .priv-sec__num {
    color: transparent;
    -webkit-text-stroke: 1px var(--cyan);
  }
}

.page-privacy .priv-sec__meta .eyebrow {
  color: var(--text-300);
  font-size: var(--fs-12);
}

/* 定义列表 */
.page-privacy .priv-defs {
  margin: 18px 0 0;
  display: grid;
  gap: 16px;
}

.page-privacy .priv-defs > div {
  border-left: 2px solid var(--line-500);
  padding-left: 16px;
}

.page-privacy .priv-defs dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-privacy .priv-defs dd {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-300);
}

/* 用途列表 */
.page-privacy .priv-uses {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-privacy .priv-uses li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  background: var(--ink-800);
  border: 1px solid var(--line-500);
  padding: 16px 18px;
}

.page-privacy .priv-uses__key {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--orange);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.page-privacy .priv-uses h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-17);
  letter-spacing: 0.02em;
  color: var(--text-100);
  margin: 0 0 6px;
}

.page-privacy .priv-uses p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-300);
}

/* 术语提示 */
.page-privacy .priv-term {
  margin-top: 20px;
  background: var(--ink-700);
  border: 1px solid var(--line-500);
}

.page-privacy .priv-term summary {
  cursor: pointer;
  list-style: none;
  padding: 13px 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.page-privacy .priv-term summary::before {
  content: "?";
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  line-height: 18px;
  text-align: center;
  font-size: 11px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
}

.page-privacy .priv-term[open] summary {
  border-bottom: 1px solid var(--line-500);
}

.page-privacy .priv-term p {
  margin: 0;
  padding: 14px 16px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-300);
}

/* 延伸入口 */
.page-privacy .priv-related {
  background: var(--ink-800);
  border-top: 1px solid var(--line-500);
  padding-block: clamp(28px, 5vw, 56px);
}

.page-privacy .priv-related__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.8vw, 28px);
  letter-spacing: 0.02em;
  color: var(--text-100);
  margin: 0 0 20px;
}

.page-privacy .priv-related__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-privacy .priv-related__list li {
  border-top: 1px solid var(--line-500);
}

.page-privacy .priv-related__list li:last-child {
  border-bottom: 1px solid var(--line-500);
}

.page-privacy .priv-related__list a {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  color: var(--text-100);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-privacy .priv-related__list a:hover,
.page-privacy .priv-related__list a:focus-visible {
  color: var(--cyan);
  text-decoration: none;
}

.page-privacy .priv-related__list .eyebrow {
  color: var(--cyan);
  font-size: var(--fs-12);
}

.page-privacy .priv-related__text {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-300);
}

/* 桌面布局 */
@media (min-width: 760px) {
  .page-privacy .priv-summary__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: stretch;
  }

  .page-privacy .priv-summary__fig {
    border-top: 1px solid var(--line-500);
    border-left: 0;
  }

  .page-privacy .priv-related__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-privacy .priv-related__list li,
  .page-privacy .priv-related__list li:last-child {
    border-bottom: 0;
    border-top: 1px solid var(--line-500);
  }
}

@media (min-width: 900px) {
  .page-privacy .priv-sec {
    grid-template-columns: minmax(0, var(--priv-measure)) 160px;
    justify-content: space-between;
    column-gap: clamp(24px, 4vw, 64px);
  }

  .page-privacy .priv-sec__meta {
    order: 2;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    position: sticky;
    top: 104px;
    text-align: right;
  }

  .page-privacy .priv-sec__num {
    font-size: var(--fs-56);
  }
}

@media (min-width: 1080px) {
  .page-privacy .priv-body {
    grid-template-columns: var(--priv-rail-w) minmax(0, 1fr);
    column-gap: clamp(24px, 3vw, 48px);
  }

  .page-privacy .priv-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
    padding-top: clamp(40px, 5vw, 64px);
    border-left: 1px solid var(--line-500);
    margin-top: clamp(40px, 5vw, 64px);
  }

  .page-privacy .priv-rail__fill {
    position: absolute;
    left: -1px;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--cyan), var(--orange));
    transform: scaleY(0);
    transform-origin: top center;
  }
}

@supports (animation-timeline: scroll()) {
  @media (min-width: 1080px) {
    .page-privacy .priv-rail__fill {
      animation: privRailFill linear both;
      animation-timeline: scroll(root block);
    }
  }
}

@keyframes privRailFill {
  from {
    transform: scaleY(0.02);
  }
  to {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-privacy .priv-rail__fill {
    animation: none !important;
    transform: scaleY(1);
  }

  .page-privacy .priv-rail__tick,
  .page-privacy .priv-related__list a {
    transition: none;
  }
}
<<<END>>>