/* ===== 数据与隐私页面专属样式 .page-privacy ===== */
.page-privacy {
  --privacy-index-width: 200px;
  --privacy-gap: 3rem;
  --privacy-section-spacing: 2.5rem;
  --privacy-icon-color: var(--color-accent, #00FF88);

  display: block;
  width: 100%;
  background-color: var(--color-background-light, #F5F7FA);
  color: var(--color-text-dark, #0A1F44);
  font-family: var(--font-base, 'Inter', system-ui, sans-serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 顶部英雄区域 */
.page-privacy .privacy-hero {
  position: relative;
  width: 100%;
  background-color: var(--color-primary, #0A1F44);
  overflow: hidden;
}

.page-privacy .privacy-hero-image {
  width: 100%;
  height: auto;
  display: block;
  line-height: 0;
}

.page-privacy .privacy-hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 800 / 200;
}

.page-privacy .privacy-hero .container {
  position: relative;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  text-align: center;
}

.page-privacy .privacy-hero-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 2.2rem;
  letter-spacing: -0.02em;
  color: var(--color-text-primary, #FFFFFF);
  line-height: 1.1;
}

.page-privacy .privacy-hero-subtitle {
  margin: 0 auto;
  max-width: 640px;
  font-size: 1rem;
  color: var(--color-text-secondary, #A0B4D0);
  line-height: 1.5;
}

/* 面包屑 */
.page-privacy .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary, #A0B4D0);
}

.page-privacy .breadcrumb a {
  color: var(--color-accent, #00FF88);
  text-decoration: none;
  transition: opacity var(--transition, 300ms ease-out);
}

.page-privacy .breadcrumb a:hover,
.page-privacy .breadcrumb a:focus-visible {
  opacity: 0.75;
  text-decoration: underline;
}

.page-privacy .breadcrumb-sep {
  color: var(--color-divider, #2A4A7A);
  margin: 0 0.125rem;
}

.page-privacy .breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--color-text-dark, #0A1F44);
}

/* 主体布局：索引 + 内容 */
.page-privacy .privacy-layout {
  display: flex;
  flex-direction: column;
  gap: var(--privacy-gap, 3rem);
  padding-top: 2rem;
  padding-bottom: 4rem;
}

/* 左侧索引 */
.page-privacy .privacy-index {
  flex-shrink: 0;
  width: 100%;
}

.page-privacy .privacy-index-heading {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-style: italic;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary, #A0B4D0);
}

.page-privacy .privacy-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.page-privacy .privacy-index-link {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-dark, #0A1F44);
  background-color: transparent;
  border: 1px solid var(--color-divider, #2A4A7A);
  border-radius: var(--border-radius-sm, 6px);
  text-decoration: none;
  transition: background-color var(--transition, 300ms ease-out),
              color var(--transition, 300ms ease-out),
              border-color var(--transition, 300ms ease-out);
}

.page-privacy .privacy-index-link:hover,
.page-privacy .privacy-index-link:focus-visible {
  background-color: var(--color-primary, #0A1F44);
  color: var(--color-text-primary, #FFFFFF);
  border-color: var(--color-primary, #0A1F44);
}

/* 右侧正文 */
.page-privacy .privacy-content {
  flex: 1;
  min-width: 0;
}

/* 章节 */
.page-privacy .privacy-section {
  scroll-margin-top: calc(var(--header-height, 64px) + 1.5rem);
}

.page-privacy .privacy-section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-privacy .privacy-section-number {
  font-family: var(--font-data, 'JetBrains Mono', monospace);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent, #00FF88);
  line-height: 1;
}

.page-privacy .privacy-section-title {
  margin: 0;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  color: var(--color-primary, #0A1F44);
  line-height: 1.2;
}

.page-privacy .privacy-section-body {
  font-size: 1rem;
  color: var(--color-text-dark, #0A1F44);
}

.page-privacy .privacy-section-body p {
  margin: 0 0 1rem;
}

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

.page-privacy .privacy-section-body a {
  color: var(--color-accent, #00FF88);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--transition, 300ms ease-out);
}

.page-privacy .privacy-section-body a:hover,
.page-privacy .privacy-section-body a:focus-visible {
  opacity: 0.75;
}

/* 列表 */
.page-privacy .privacy-list {
  margin: 0 0 1.25rem;
  padding: 0 0 0 1.25rem;
  list-style: none;
}

.page-privacy .privacy-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.625rem;
  line-height: 1.6;
}

.page-privacy .privacy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent, #00FF88);
  border-radius: 50%;
  opacity: 0.5;
}

.page-privacy .privacy-list li strong {
  font-weight: 600;
  color: var(--color-primary, #0A1F44);
}

/* 注释性文字 */
.page-privacy .privacy-note {
  font-size: 0.875rem;
  color: var(--color-text-secondary, #A0B4D0);
  border-left: 3px solid var(--color-divider, #2A4A7A);
  padding-left: 1rem;
  margin-top: 1rem;
}

/* 信息保护图标 */
.page-privacy .privacy-protection-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
  color: var(--color-primary, #0A1F44);
  opacity: 0.8;
}

.page-privacy .privacy-protection-icon svg {
  display: block;
  width: 48px;
  height: 48px;
}

/* 分割线 */
.page-privacy .privacy-divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-divider, #2A4A7A);
  margin: var(--privacy-section-spacing, 2.5rem) 0;
  opacity: 0.25;
}

/* 页脚注释 */
.page-privacy .privacy-footer-note {
  margin-top: 2rem;
  padding: 1.5rem;
  background-color: var(--color-primary, #0A1F44);
  border-radius: var(--border-radius, 12px);
  color: var(--color-text-secondary, #A0B4D0);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-privacy .privacy-footer-note p {
  margin: 0 0 0.5rem;
}

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

/* 返回顶部按钮 */
.page-privacy .privacy-back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.5rem;
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background-color: var(--color-primary, #0A1F44);
  color: var(--color-text-primary, #FFFFFF);
  box-shadow: var(--shadow-md, 0 4px 20px rgba(0,0,0,0.18));
  cursor: pointer;
  transition: transform var(--transition, 300ms ease-out),
              opacity var(--transition, 300ms ease-out),
              background-color var(--transition, 300ms ease-out);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
}

.page-privacy .privacy-back-to-top[data-visible] {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.page-privacy .privacy-back-to-top:hover,
.page-privacy .privacy-back-to-top:focus-visible {
  background-color: var(--color-accent, #00FF88);
  color: var(--color-primary, #0A1F44);
  transform: translateY(-2px);
}

.page-privacy .privacy-back-to-top svg {
  display: block;
  width: 20px;
  height: 20px;
}

/* ===== 桌面端布局（≥768px） ===== */
@media (min-width: 768px) {
  .page-privacy .privacy-hero .container {
    padding-top: 2.5rem;
    padding-bottom: 3rem;
  }

  .page-privacy .privacy-hero-title {
    font-size: 3rem;
  }

  .page-privacy .privacy-hero-subtitle {
    font-size: 1.125rem;
  }

  .page-privacy .privacy-layout {
    flex-direction: row;
    align-items: flex-start;
    padding-top: 3rem;
    padding-bottom: 5rem;
  }

  .page-privacy .privacy-index {
    position: sticky;
    top: calc(var(--header-height, 64px) + 1.5rem);
    width: var(--privacy-index-width, 200px);
    flex-shrink: 0;
    align-self: flex-start;
    display: block;
  }

  .page-privacy .privacy-index-list {
    flex-direction: column;
    gap: 0.375rem;
  }

  .page-privacy .privacy-index-link {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.9375rem;
    border: none;
    border-left: 3px solid transparent;
    border-radius: 0;
    background-color: transparent;
    color: var(--color-text-secondary, #A0B4D0);
    transition: color var(--transition, 300ms ease-out),
                border-left-color var(--transition, 300ms ease-out),
                background-color var(--transition, 300ms ease-out);
  }

  .page-privacy .privacy-index-link:hover,
  .page-privacy .privacy-index-link:focus-visible,
  .page-privacy .privacy-index-link[data-current] {
    color: var(--color-primary, #0A1F44);
    border-left-color: var(--color-accent, #00FF88);
    background-color: transparent;
  }

  .page-privacy .privacy-section-title {
    font-size: 2rem;
  }

  .page-privacy .privacy-section-number {
    font-size: 1.5rem;
  }

  .page-privacy .privacy-back-to-top {
    right: 2rem;
    bottom: 2rem;
    width: 48px;
    height: 48px;
  }
}

/* ===== 大桌面端（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-privacy .privacy-index {
    width: 220px;
  }

  .page-privacy .privacy-content {
    padding-left: 1rem;
  }

  .page-privacy .privacy-hero-title {
    font-size: 3.5rem;
  }
}