.page-privacy {
  --priv-gap: 40px;
  position: relative;
  display: block;
  background-color: var(--ky-ink);
  background-image:
    linear-gradient(var(--ky-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--ky-line-soft) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
  color: var(--ky-white);
  padding-bottom: 72px;
}

.page-privacy .ky-shell {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 20px;
}

/* 面包屑与首屏 */
.priv-crumbs {
  padding: 24px 0 6px;
  font-size: 13px;
  color: var(--ky-mist);
}

.page-privacy .ky-crumbs a {
  color: var(--ky-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.24s var(--ky-ease), border-color 0.24s var(--ky-ease);
}

.page-privacy .ky-crumbs a:hover,
.page-privacy .ky-crumbs a:focus-visible {
  color: var(--ky-cyan);
  border-color: var(--ky-cyan);
}

.priv-hero {
  padding: 18px 0 6px;
  max-width: 940px;
}

.priv-hero__kicker {
  margin: 0 0 14px;
  color: var(--ky-cyan);
}

.priv-hero__title {
  margin: 0 0 18px;
  max-width: 20ch;
  font-size: clamp(30px, 7.4vw, 60px);
  font-weight: 250;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ky-white);
}

.priv-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ky-mist);
  border-left: 2px solid var(--ky-cyan);
  padding-left: 16px;
}

/* 横幅图 */
.priv-banner {
  margin: 34px 0 0;
}

.priv-banner .ky-figure__media {
  border-radius: var(--ky-radius);
  overflow: hidden;
  border: 1px solid var(--ky-line-soft);
}

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

.priv-banner .ky-figure__caption {
  margin-top: 10px;
  color: var(--ky-mist);
  font-size: 13px;
  line-height: 1.6;
}

/* 主体：索引轴 + 内容流 */
.priv-body {
  display: block;
  padding-top: 28px;
}

.priv-axis {
  border-left: 1px solid var(--ky-line-soft);
  padding-left: 16px;
  margin-bottom: 28px;
}

.page-privacy .ky-axis__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ky-mist);
}

.page-privacy .ky-axis__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-privacy .ky-axis__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ky-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--ky-ease), border-color 0.22s var(--ky-ease);
}

.page-privacy .ky-axis__link::before {
  content: attr(data-index);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ky-cyan);
  opacity: 0.75;
}

.page-privacy .ky-axis__link:hover,
.page-privacy .ky-axis__link:focus-visible,
.page-privacy .ky-axis__link[aria-current="true"] {
  color: var(--ky-cyan);
  border-color: var(--ky-cyan);
}

.priv-flow {
  display: grid;
  gap: var(--priv-gap);
}

/* 章节 */
.priv-sec {
  padding-top: 26px;
  border-top: 1px solid var(--ky-line-soft);
}

.priv-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.priv-sec__num {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ky-cyan);
}

.page-privacy .priv-sec__head .ky-h2 {
  margin: 0;
  font-size: clamp(23px, 4vw, 34px);
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ky-white);
}

.priv-sec__intro {
  margin: 0 0 4px;
  max-width: 62ch;
  color: var(--ky-mist);
  font-size: 15px;
  line-height: 1.75;
}

.priv-sec__intro + .priv-sec__intro {
  margin-top: 10px;
}

/* 可折叠条目 */
.priv-item {
  margin-top: 12px;
  padding: 14px 16px;
  background: var(--ky-panel);
  border: 1px solid var(--ky-line-soft);
  border-radius: var(--ky-radius);
  transition: border-color 0.24s var(--ky-ease), background-color 0.24s var(--ky-ease);
}

.priv-item[open] {
  border-color: var(--ky-line);
}

.priv-item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  outline-offset: 4px;
}

.priv-item summary::-webkit-details-marker {
  display: none;
}

.priv-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--ky-font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--ky-cyan);
}

.priv-item[open] summary::after {
  content: "–";
}

.priv-item summary:focus-visible {
  outline: 1px solid var(--ky-cyan);
}

.page-privacy .priv-item__title {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ky-white);
}

.priv-text {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ky-mist);
}

/* 用途三栏 */
.priv-uses {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.priv-use {
  padding: 14px 16px;
  border-left: 2px solid var(--ky-amber);
  background: linear-gradient(90deg, rgba(255, 162, 58, 0.08), transparent 78%);
}

.priv-use__label {
  margin: 0 0 6px;
  color: var(--ky-amber);
}

.priv-use p:last-child {
  margin: 0;
  color: var(--ky-white);
  font-size: 14px;
  line-height: 1.7;
}

/* 留存表 */
.priv-table-wrap {
  margin-top: 22px;
  overflow-x: auto;
  border: 1px solid var(--ky-line-soft);
  border-radius: var(--ky-radius);
  background: var(--ky-panel);
}

.priv-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 14px;
}

.priv-table__caption {
  caption-side: top;
  padding: 14px 16px 8px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ky-mist);
}

.priv-table th,
.priv-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-top: 1px solid var(--ky-line-soft);
}

.priv-table thead th {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ky-cyan);
}

.priv-table tbody td {
  color: var(--ky-mist);
  line-height: 1.65;
}

.priv-table tbody td:first-child {
  color: var(--ky-white);
  font-weight: 500;
}

/* 操作卡片 */
.priv-cards {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.priv-card {
  padding: 16px;
  background: var(--ky-panel);
  border: 1px solid var(--ky-line-soft);
  border-radius: var(--ky-radius);
}

.page-privacy .priv-card .ky-h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ky-white);
}

.priv-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ky-mist);
}

.priv-mark {
  color: var(--ky-cyan-soft);
  border-bottom: 1px solid var(--ky-cyan-soft);
  padding-bottom: 1px;
}

/* 指向其他栏目的链接列表 */
.priv-links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-top: 1px solid var(--ky-line-soft);
}

.priv-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--ky-line-soft);
  text-decoration: none;
  transition: background-color 0.22s var(--ky-ease);
}

.priv-links a:hover,
.priv-links a:focus-visible {
  background: var(--ky-glass);
}

.priv-links__k {
  flex: 0 0 auto;
  min-width: 76px;
  color: var(--ky-cyan);
}

.priv-links__t {
  flex: 1 1 240px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ky-mist);
}

/* 平板及以上 */
@media (min-width: 680px) {
  .page-privacy {
    --priv-gap: 48px;
  }

  .page-privacy .ky-shell {
    padding-inline: 32px;
  }

  .priv-uses {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .priv-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 桌面：左侧固定索引轴 + 右侧纵向内容流 */
@media (min-width: 960px) {
  .page-privacy {
    --priv-gap: 56px;
    padding-bottom: 104px;
  }

  .page-privacy .ky-shell {
    padding-inline: 40px;
  }

  .priv-body {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    column-gap: 56px;
    padding-top: 56px;
  }

  .priv-axis {
    position: sticky;
    top: 96px;
    align-self: start;
    margin-bottom: 0;
    padding-left: 18px;
  }

  .page-privacy .ky-axis__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    margin-top: 14px;
  }

  .page-privacy .ky-axis__link {
    display: flex;
    width: 100%;
  }

  .priv-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .priv-links__k {
    min-width: 96px;
  }
}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-privacy *,
  .page-privacy *::before,
  .page-privacy *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}