.page-privacy {
  display: block;
  scroll-behavior: smooth;
  --privacy-font-wide: 0.02em;
  --privacy-heading-wide: 0.04em;
  --privacy-index-width: 210px;
  --privacy-content-max: 760px;
  --privacy-section-gap: var(--sp-xl, 64px);
  --privacy-dot-size: 8px;
  --privacy-border-left: 3px;
  --privacy-lead-size: 20px;
}

.page-privacy__layout {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg, 32px);
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--sp-lg, 32px) var(--sp-md, 16px) var(--sp-xl, 64px);
}

/* 侧边索引 */
.page-privacy__index {
  position: relative;
  width: 100%;
  order: -1;
  margin-bottom: var(--sp-md, 16px);
}

.page-privacy__index-heading {
  display: flex;
  align-items: center;
  gap: var(--sp-sm, 8px);
  font-family: var(--font-ui, 'Noto Sans SC', sans-serif);
  font-size: var(--size-ui, 14px);
  font-weight: var(--weight-bold, 700);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: var(--privacy-heading-wide);
  margin-bottom: var(--sp-sm, 8px);
  text-transform: uppercase;
}

.page-privacy__index-dot {
  display: inline-block;
  width: var(--privacy-dot-size);
  height: var(--privacy-dot-size);
  background-color: var(--color-primary, #B22222);
  flex-shrink: 0;
}

.page-privacy__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: var(--sp-xs, 4px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: var(--sp-sm, 8px);
}

.page-privacy__index-list::-webkit-scrollbar {
  height: 2px;
}

.page-privacy__index-list::-webkit-scrollbar-thumb {
  background-color: var(--color-border, #D4D4D4);
  border-radius: var(--radius, 2px);
}

.page-privacy__index-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs, 4px);
  font-family: var(--font-ui, 'Noto Sans SC', sans-serif);
  font-size: var(--size-small, 12px);
  font-weight: var(--weight-body, 400);
  color: var(--color-neutral-3, #2C2C2C);
  text-decoration: none;
  letter-spacing: var(--privacy-font-wide);
  white-space: nowrap;
  padding: var(--sp-xs, 4px) var(--sp-sm, 8px);
  border: 1px solid transparent;
  border-radius: var(--radius, 2px);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  position: relative;
}

.page-privacy__index-link::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  background-color: var(--color-primary, #B22222);
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.page-privacy__index-link:hover,
.page-privacy__index-link:focus-visible {
  color: var(--color-primary, #B22222);
  border-color: var(--color-primary, #B22222);
  background-color: var(--color-neutral-2, #F5F5F0);
  outline: none;
}

.page-privacy__index-link:hover::before,
.page-privacy__index-link:focus-visible::before {
  opacity: 1;
}

/* 面包屑 */
.page-privacy .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-xs, 4px);
  font-family: var(--font-ui, 'Noto Sans SC', sans-serif);
  font-size: var(--size-small, 12px);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: 0.02em;
  margin-bottom: var(--sp-md, 16px);
  opacity: 0.7;
}

.page-privacy .breadcrumb__link {
  color: var(--color-secondary-2, #1E3A5F);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-privacy .breadcrumb__link:hover {
  color: var(--color-accent, #2E8B57);
}

.page-privacy .breadcrumb__item {
  color: var(--color-border, #D4D4D4);
}

/* 标题与导语 */
.page-privacy__title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--size-h2, 36px);
  font-weight: var(--weight-heading, 900);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: var(--privacy-heading-wide);
  line-height: 1.2;
  margin: 0 0 var(--sp-sm, 8px);
  padding-bottom: var(--sp-sm, 8px);
  border-bottom: 2px solid var(--color-primary, #B22222);
}

.page-privacy__lead {
  font-family: var(--font-body, 'Noto Serif SC', serif);
  font-size: var(--privacy-lead-size, 20px);
  line-height: var(--line-body, 1.6);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: var(--privacy-font-wide);
  margin: 0 0 var(--sp-xl, 64px);
  padding: var(--sp-sm, 8px) 0;
  border-left: var(--privacy-border-left) solid var(--color-primary, #B22222);
  padding-left: var(--sp-md, 16px);
  opacity: 0.85;
}

/* 内容区 */
.page-privacy__content {
  width: 100%;
  min-width: 0;
}

/* 章节 */
.page-privacy__section {
  margin-bottom: var(--privacy-section-gap);
  padding-left: 0;
  border-left: var(--privacy-border-left) solid transparent;
  transition: border-color 0.3s ease, background-color 0.3s ease;
  border-radius: 0 var(--radius, 2px) var(--radius, 2px) 0;
}

.page-privacy__section:target {
  border-left-color: var(--color-primary, #B22222);
  background-color: var(--color-neutral-2, #F5F5F0);
  padding-left: var(--sp-md, 16px);
  outline: none;
}

.page-privacy__section-heading {
  display: flex;
  align-items: center;
  gap: var(--sp-sm, 8px);
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--size-h3, 28px);
  font-weight: var(--weight-heading, 900);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: var(--privacy-heading-wide);
  line-height: 1.3;
  margin: 0 0 var(--sp-sm, 8px);
  position: relative;
}

.page-privacy__section-heading::before {
  content: '';
  display: inline-block;
  width: var(--privacy-dot-size);
  height: var(--privacy-dot-size);
  background-color: var(--color-primary, #B22222);
  flex-shrink: 0;
  margin-right: var(--sp-xs, 4px);
}

.page-privacy__section-body {
  font-family: var(--font-body, 'Noto Serif SC', serif);
  font-size: var(--size-body, 18px);
  line-height: var(--line-body, 1.6);
  color: var(--color-neutral-3, #2C2C2C);
  letter-spacing: var(--privacy-font-wide);
  margin: 0;
  max-width: var(--privacy-content-max);
}

/* 装饰分隔线 */
.page-privacy__divider {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: calc(var(--sp-xl, 64px) * 0.6) auto;
  opacity: 0.8;
  border-radius: var(--radius, 2px);
}

/* 内联链接 */
.page-privacy__inline-link {
  color: var(--color-secondary-2, #1E3A5F);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.page-privacy__inline-link:hover,
.page-privacy__inline-link:focus-visible {
  color: var(--color-accent, #2E8B57);
  text-decoration-color: var(--color-accent, #2E8B57);
  outline: none;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-privacy__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--sp-xl, 64px);
    padding: var(--sp-lg, 32px) var(--sp-lg, 32px) var(--sp-xl, 64px);
  }

  .page-privacy__index {
    position: sticky;
    top: calc(var(--header-h, 72px) + var(--sp-lg, 32px));
    width: var(--privacy-index-width);
    flex-shrink: 0;
    order: 0;
    margin-bottom: 0;
    padding-top: 0;
  }

  .page-privacy__index-list {
    flex-direction: column;
    gap: var(--sp-xs, 4px);
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-privacy__index-link {
    white-space: normal;
    font-size: var(--size-ui, 14px);
    padding: var(--sp-xs, 4px) var(--sp-sm, 8px);
    border-left: 2px solid transparent;
    border-top: none;
    border-right: none;
    border-bottom: none;
    border-radius: 0;
  }

  .page-privacy__index-link::before {
    display: none;
  }

  .page-privacy__index-link:hover,
  .page-privacy__index-link:focus-visible {
    border-left-color: var(--color-primary, #B22222);
    background-color: transparent;
  }

  .page-privacy__content {
    flex: 1;
    min-width: 0;
  }

  .page-privacy__title {
    font-size: var(--size-h1, 48px);
  }

  .page-privacy__section-heading {
    font-size: var(--size-h2, 36px);
  }

  .page-privacy__section {
    margin-bottom: calc(var(--privacy-section-gap) * 1.2);
  }

  .page-privacy__divider {
    max-width: 600px;
    margin: calc(var(--sp-xl, 64px) * 0.8) auto;
  }

  .page-privacy__lead {
    font-size: var(--size-body, 18px);
  }
}

@media (min-width: 1024px) {
  .page-privacy__layout {
    gap: calc(var(--sp-xl, 64px) * 1.25);
    padding-left: var(--sp-xl, 64px);
    padding-right: var(--sp-xl, 64px);
  }

  .page-privacy__index {
    width: calc(var(--privacy-index-width) + 20px);
  }

  .page-privacy__content {
    padding-right: var(--sp-lg, 32px);
  }
}