.page-privacy {
  --privacy-bg: #f9fafb;
  --privacy-card-bg: #ffffff;
  --privacy-border: #e2e8f0;
  --privacy-text: #1a1a1a;
  --privacy-muted: #5a5a5a;
  --privacy-highlight: #e63946;
  --privacy-accent: #0b1f3a;
  --privacy-gold: #f5c518;
  --privacy-max-width: 800px;
  --privacy-font-body: 'Open Sans', sans-serif;
  --privacy-font-heading: 'Inter', sans-serif;
  --privacy-transition: 0.3s ease;

  background-color: var(--privacy-bg);
  color: var(--privacy-text);
  font-family: var(--privacy-font-body);
  line-height: 1.7;
  padding: 2rem 1rem 4rem;
}

/* 容器 */
.page-privacy .privacy-container {
  max-width: var(--privacy-max-width);
  margin: 0 auto;
}

/* 头部 */
.page-privacy .privacy-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--privacy-gold);
}

.page-privacy .privacy-context {
  font-family: var(--privacy-font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--privacy-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.page-privacy .privacy-header h1 {
  font-family: var(--privacy-font-heading);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.2rem);
  color: var(--privacy-accent);
  margin: 0 0 0.25rem;
  line-height: 1.15;
}

.page-privacy .privacy-subtitle {
  font-family: var(--privacy-font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--privacy-gold);
  margin-bottom: 1rem;
}

.page-privacy .privacy-intro p {
  font-size: 1rem;
  color: var(--privacy-muted);
  max-width: 65ch;
}

/* 目录导航 */
.page-privacy .privacy-toc {
  background: var(--privacy-card-bg);
  border: 1px solid var(--privacy-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.page-privacy .toc-title {
  font-family: var(--privacy-font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--privacy-accent);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

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

.page-privacy .toc-list a {
  display: block;
  font-family: var(--privacy-font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--privacy-accent);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--privacy-border);
  border-radius: 6px;
  transition: background var(--privacy-transition), color var(--privacy-transition);
}

.page-privacy .toc-list a:hover,
.page-privacy .toc-list a:focus {
  background: var(--privacy-accent);
  color: #fff;
  border-color: var(--privacy-accent);
}

/* 内容区 */
.page-privacy .privacy-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* 每个章节 */
.page-privacy .privacy-section {
  background: var(--privacy-card-bg);
  border: 1px solid var(--privacy-border);
  border-radius: 8px;
  padding: 1.75rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.page-privacy .privacy-section h2 {
  font-family: var(--privacy-font-heading);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--privacy-accent);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--privacy-gold);
  display: inline-block;
}

.page-privacy .privacy-section p {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--privacy-text);
}

.page-privacy .privacy-section ul {
  margin: 0.5rem 0 1rem;
  padding-left: 1.5rem;
}

.page-privacy .privacy-section li {
  margin-bottom: 0.5rem;
  font-size: 1rem;
  line-height: 1.6;
}

/* 高亮术语 */
.page-privacy .highlight-term {
  color: var(--privacy-highlight);
  font-weight: 600;
  font-style: italic;
}

/* 内联链接 */
.page-privacy .inline-link {
  color: var(--privacy-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--privacy-gold);
  font-weight: 600;
  transition: color var(--privacy-transition);
}

.page-privacy .inline-link:hover,
.page-privacy .inline-link:focus {
  color: var(--privacy-gold);
}

/* 图片视觉 */
.page-privacy .section-visual {
  margin: 1.25rem 0 0;
  text-align: center;
}

.page-privacy .security-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--privacy-border);
  object-fit: cover;
}

/* 联系信息 */
.page-privacy .privacy-contact {
  font-style: normal;
  background: var(--privacy-bg);
  border-left: 4px solid var(--privacy-gold);
  padding: 1rem 1.25rem;
  margin: 1rem 0 0.5rem;
  border-radius: 0 6px 6px 0;
  line-height: 1.8;
}

.page-privacy .privacy-contact a {
  color: var(--privacy-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-privacy .privacy-contact a:hover {
  color: var(--privacy-gold);
}

.page-privacy .privacy-note {
  font-size: 0.875rem;
  color: var(--privacy-muted);
  margin: 0.25rem 0 0;
}

/* 尾章节 */
.page-privacy .privacy-final {
  border-left: 4px solid var(--privacy-gold);
}

/* 返回顶部 */
.page-privacy .back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  background: var(--privacy-accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: opacity var(--privacy-transition), transform var(--privacy-transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  z-index: 100;
}

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

.page-privacy .back-to-top:hover {
  background: var(--privacy-gold);
  color: var(--privacy-accent);
}

/* === 移动端优先（默认窄屏）=== */
@media (max-width: 639px) {
  .page-privacy {
    padding: 1.5rem 0.75rem 3rem;
  }

  .page-privacy .privacy-toc {
    padding: 1rem;
  }

  .page-privacy .toc-list {
    flex-direction: column;
    gap: 0.4rem;
  }

  .page-privacy .toc-list a {
    text-align: center;
  }

  .page-privacy .privacy-section {
    padding: 1.25rem;
  }

  .page-privacy .privacy-contact {
    padding: 0.75rem 1rem;
  }

  .page-privacy .back-to-top {
    bottom: 1.5rem;
    right: 0.75rem;
    width: 44px;
    height: 44px;
  }
}

/* === 平板及以上 === */
@media (min-width: 640px) {
  .page-privacy {
    padding: 3rem 2rem 5rem;
  }

  .page-privacy .privacy-header h1 {
    font-size: clamp(2.5rem, 4vw, 3.2rem);
  }

  .page-privacy .privacy-toc {
    padding: 1.75rem;
  }

  .page-privacy .toc-list {
    gap: 0.75rem;
  }

  .page-privacy .privacy-section {
    padding: 2rem 2.25rem;
  }

  .page-privacy .privacy-section h2 {
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  }

  .page-privacy .back-to-top {
    right: 2rem;
    width: 52px;
    height: 52px;
  }
}

/* === 桌面 === */
@media (min-width: 1024px) {
  .page-privacy {
    padding: 4rem 2rem 6rem;
  }

  .page-privacy .privacy-container {
    max-width: var(--privacy-max-width);
  }

  .page-privacy .privacy-toc {
    padding: 2rem 2.5rem;
  }

  .page-privacy .privacy-section {
    padding: 2.5rem 3rem;
  }
}