.page-privacy {
  --privacy-index-width: 220px;
  --privacy-grid-gap: 48px;
  --privacy-line-color: var(--color-primary, #00C853);
  --privacy-bg-grid: #F9F9FB;

  position: relative;
  background-color: var(--privacy-bg-grid);
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center center;
  font-family: var(--font-body, "Noto Sans SC", "Source Han Sans SC", Roboto, sans-serif);
  color: var(--color-text, #333);
  line-height: 1.75;
  padding: var(--space-lg, 32px) var(--space-md, 16px) var(--space-2xl, 96px);
  min-height: 80vh;
}

/* ===== 网格布局容器 ===== */
.privacy-grid-shell {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 32px);
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
}

/* ===== 索引 ===== */
.privacy-index {
  order: 0;
  flex-shrink: 0;
}

.privacy-index-inner {
  background: var(--color-white, #fff);
  border: 1px solid var(--color-border-light, #E0E0E0);
  border-radius: var(--radius-md, 4px);
  padding: var(--space-md, 16px) var(--space-lg, 32px);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.12));
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.privacy-index-label {
  display: block;
  font-family: var(--font-heading, Impact, "Arial Black", sans-serif);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-text-secondary, #B0BEC5);
  margin-bottom: var(--space-sm, 8px);
}

.privacy-index-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: var(--space-md, 16px) var(--space-lg, 32px);
  white-space: nowrap;
}

.privacy-index-list li {
  margin: 0;
}

.privacy-index-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text, #333);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast, 150ms ease), color var(--transition-fast, 150ms ease);
  position: relative;
}

.privacy-index-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--privacy-line-color);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base, 300ms ease);
}

.privacy-index-list a:hover,
.privacy-index-list a:focus {
  color: var(--privacy-line-color);
}

.privacy-index-list a:hover::after,
.privacy-index-list a:focus::after {
  transform: scaleX(1);
}

/* ===== 主内容区 ===== */
.privacy-main {
  order: 1;
  flex: 1;
  min-width: 0;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  margin-bottom: var(--space-md, 16px);
  font-size: 14px;
}

.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.breadcrumb li {
  display: inline;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-text-secondary, #B0BEC5);
}

.breadcrumb a {
  color: var(--color-secondary, #2979FF);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary, #B0BEC5);
  font-weight: 400;
}

/* ===== 标题区 ===== */
.privacy-heading {
  font-family: var(--font-heading, Impact, "Arial Black", "Noto Sans SC", sans-serif);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-sm, 8px);
  color: var(--color-bg-dark, #1A1A2E);
  letter-spacing: 1px;
  position: relative;
  display: inline-block;
}

.privacy-heading::after {
  content: "";
  display: block;
  width: 80px;
  height: 4px;
  background: var(--privacy-line-color);
  margin-top: var(--space-sm, 8px);
  border-radius: var(--radius-sm, 2px);
}

.privacy-lede {
  font-size: 17px;
  color: var(--color-text-secondary, #B0BEC5);
  max-width: 720px;
  margin: var(--space-md, 16px) 0 var(--space-lg, 32px);
  line-height: 1.7;
}

/* ===== 主题图 ===== */
.privacy-hero-figure {
  margin: 0 0 var(--space-xl, 64px);
  border-radius: var(--radius-md, 4px);
  overflow: hidden;
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.15));
  background: var(--color-bg-dark, #1A1A2E);
  line-height: 0;
}

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

/* ===== 段落区块 ===== */
.privacy-section {
  background: var(--color-white, #fff);
  border: 1px solid var(--color-border-light, #E0E0E0);
  border-radius: var(--radius-md, 4px);
  padding: var(--space-lg, 32px) var(--space-lg, 32px) var(--space-lg, 32px);
  margin-bottom: var(--space-lg, 32px);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.08));
  transition: box-shadow var(--transition-base, 300ms ease);
}

.privacy-section:hover {
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.12));
}

.privacy-section-title {
  font-family: var(--font-heading, Impact, "Arial Black", "Noto Sans SC", sans-serif);
  font-size: 22px;
  font-weight: 600;
  margin: 0;
  color: var(--color-bg-dark, #1A1A2E);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm, 8px);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  padding-bottom: var(--space-sm, 8px);
  border-bottom: 2px solid var(--color-border-light, #E0E0E0);
  transition: color var(--transition-fast, 150ms ease);
}

.privacy-section-title:hover {
  color: var(--privacy-line-color);
}

.privacy-section-title .toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform var(--transition-base, 300ms ease);
}

.privacy-section-title .toggle-icon::before {
  content: "";
  display: block;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-text-secondary, #B0BEC5);
  border-bottom: 2px solid var(--color-text-secondary, #B0BEC5);
  transform: rotate(45deg);
  transition: transform var(--transition-base, 300ms ease);
}

/* 默认展开状态：箭头向上 */
[data-collapsible]:not([data-collapsed]) .toggle-icon::before {
  transform: rotate(-135deg);
}

/* 折叠状态：箭头向下 */
[data-collapsible][data-collapsed] .toggle-icon::before {
  transform: rotate(45deg);
}

/* ===== 段落正文 ===== */
.privacy-section-body {
  padding-top: var(--space-md, 16px);
  overflow: hidden;
  transition: max-height var(--transition-slow, 500ms ease), opacity var(--transition-base, 300ms ease);
  max-height: 2000px;
  opacity: 1;
}

[data-collapsible][data-collapsed] .privacy-section-body {
  max-height: 0;
  padding-top: 0;
  opacity: 0;
}

.privacy-section-body p {
  margin: 0 0 var(--space-md, 16px);
  font-size: 16px;
  color: var(--color-text, #333);
}

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

/* ===== 列表 ===== */
.privacy-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md, 16px);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 8px);
}

.privacy-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--color-text, #333);
  line-height: 1.6;
}

.privacy-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--privacy-line-color);
  font-weight: 600;
}

.privacy-list li strong {
  color: var(--color-bg-dark, #1A1A2E);
  font-weight: 600;
}

/* ===== 提示框 ===== */
.privacy-note {
  background: rgba(0, 200, 83, 0.06);
  border-left: 4px solid var(--privacy-line-color);
  padding: var(--space-sm, 8px) var(--space-md, 16px);
  border-radius: 0 var(--radius-sm, 2px) var(--radius-sm, 2px) 0;
  font-size: 15px;
  color: var(--color-text-secondary, #B0BEC5);
  margin-top: var(--space-md, 16px);
}

.privacy-note strong {
  color: var(--color-bg-dark, #1A1A2E);
}

/* ===== 底部链接 ===== */
.privacy-footer-links {
  margin-top: var(--space-xl, 64px);
  padding-top: var(--space-lg, 32px);
  border-top: 1px solid var(--color-border-light, #E0E0E0);
  text-align: center;
}

.privacy-footer-links p {
  font-size: 15px;
  color: var(--color-text-secondary, #B0BEC5);
  margin: 0;
}

.privacy-footer-links a {
  color: var(--color-secondary, #2979FF);
  text-decoration: none;
  font-weight: 500;
}

.privacy-footer-links a:hover {
  text-decoration: underline;
  color: var(--color-primary, #00C853);
}

/* ===== 响应式：桌面端 ≥ 900px ===== */
@media (min-width: 900px) {
  .page-privacy {
    padding: var(--space-xl, 64px) var(--space-lg, 32px) var(--space-2xl, 96px);
  }

  .privacy-grid-shell {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--privacy-grid-gap);
  }

  .privacy-index {
    order: 0;
    position: sticky;
    top: var(--space-lg, 32px);
    width: var(--privacy-index-width);
    flex-shrink: 0;
  }

  .privacy-index-inner {
    padding: var(--space-lg, 32px);
    overflow: visible;
  }

  .privacy-index-list {
    flex-direction: column;
    gap: var(--space-sm, 8px);
    white-space: normal;
  }

  .privacy-index-list a {
    font-size: 15px;
    display: block;
    padding: 6px 0;
    border-bottom: none;
  }

  .privacy-index-list a::after {
    bottom: 0;
    height: 2px;
  }

  .privacy-main {
    order: 1;
    flex: 1;
    min-width: 0;
  }

  .privacy-heading {
    font-size: 52px;
  }

  .privacy-heading::after {
    width: 100px;
    height: 5px;
  }

  .privacy-section {
    padding: var(--space-xl, 64px) var(--space-xl, 64px);
  }

  .privacy-section-title {
    font-size: 26px;
  }

  .privacy-hero-figure {
    margin-bottom: var(--space-2xl, 96px);
  }
}

/* ===== 桌面大屏 ≥ 1200px ===== */
@media (min-width: 1200px) {
  .privacy-grid-shell {
    gap: 64px;
  }

  .privacy-index {
    width: 240px;
  }

  .privacy-heading {
    font-size: 60px;
  }

  .privacy-lede {
    font-size: 19px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .page-privacy {
    background: #fff;
    padding: 20px;
  }
  .privacy-index {
    display: none;
  }
  .privacy-section {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  .privacy-section-title .toggle-icon {
    display: none;
  }
  [data-collapsible][data-collapsed] .privacy-section-body {
    max-height: none !important;
    opacity: 1 !important;
    padding-top: 16px !important;
  }
  .privacy-hero-figure {
    max-width: 60%;
    margin: 0 auto 40px;
  }
}