.page-privacy {
  --color-bg: #0A0E27;
  --color-bg-elevated: #12183A;
  --color-accent: #FF6B35;
  --color-text: #F5F7FA;
  --color-text-muted: #8C9EAB;
  --color-glow: #00BCD4;
  --color-border-start: #B0BEC5;
  --color-border-end: #ECEFF1;
  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-body: 'Arial', 'Helvetica', sans-serif;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --transition: 0.3s ease;
  --max-width: 900px;
  display: block;
  width: 100%;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page-privacy .privacy-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md) var(--space-2xl);
}

/* 面包屑 */
.page-privacy .privacy-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.page-privacy .privacy-breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.page-privacy .privacy-breadcrumb a:hover,
.page-privacy .privacy-breadcrumb a:focus {
  color: var(--color-glow);
  outline: none;
}

.page-privacy .privacy-breadcrumb .bc-sep {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.page-privacy .privacy-breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

/* 头部区域 */
.page-privacy .privacy-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.page-privacy .privacy-shield {
  width: 56px;
  height: 56px;
  display: block;
  flex-shrink: 0;
}

.page-privacy .privacy-hero-bg {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 900px;
  height: auto;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

.page-privacy .privacy-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--color-text);
  line-height: 1.2;
}

.page-privacy .privacy-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0;
  max-width: 640px;
  line-height: 1.6;
}

/* 标签页容器 */
.page-privacy .privacy-tabs {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.page-privacy .tab-radio {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* 标签导航 */
.page-privacy .tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  width: 100%;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(176, 190, 197, 0.2);
  padding-bottom: var(--space-sm);
}

.page-privacy .tab-label {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-align: center;
  white-space: nowrap;
  position: relative;
  user-select: none;
}

.page-privacy .tab-label::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}

.page-privacy .tab-label:hover,
.page-privacy .tab-label:focus-visible {
  color: var(--color-text);
  outline: none;
}

.page-privacy .tab-label:focus-visible {
  box-shadow: 0 0 0 2px var(--color-glow);
}

#ptab1:checked ~ .tab-nav label[for="ptab1"],
#ptab2:checked ~ .tab-nav label[for="ptab2"],
#ptab3:checked ~ .tab-nav label[for="ptab3"],
#ptab4:checked ~ .tab-nav label[for="ptab4"] {
  color: var(--color-accent);
}

#ptab1:checked ~ .tab-nav label[for="ptab1"]::after,
#ptab2:checked ~ .tab-nav label[for="ptab2"]::after,
#ptab3:checked ~ .tab-nav label[for="ptab3"]::after,
#ptab4:checked ~ .tab-nav label[for="ptab4"]::after {
  background: var(--color-accent);
}

/* tab 面板 */
.page-privacy .tab-panel {
  display: none;
  width: 100%;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg-elevated);
  border: 1px solid rgba(176, 190, 197, 0.15);
  border-top: none;
  transition: opacity var(--transition);
}

#ptab1:checked ~ #panel1,
#ptab2:checked ~ #panel2,
#ptab3:checked ~ #panel3,
#ptab4:checked ~ #panel4 {
  display: block;
  animation: privacyFadeIn 0.35s ease;
}

@keyframes privacyFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-privacy .panel-heading {
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: 1.375rem;
  color: var(--color-text);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.3;
}

.page-privacy .panel-deco {
  margin: 0 0 var(--space-lg) 0;
  height: 1px;
  background: linear-gradient(135deg, var(--color-border-start), var(--color-border-end));
  opacity: 0.4;
  border: none;
}

.page-privacy .panel-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.page-privacy .panel-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.55;
}

.page-privacy .panel-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.page-privacy .panel-link {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.page-privacy .panel-link:hover,
.page-privacy .panel-link:focus-visible {
  color: var(--color-glow);
  border-bottom-color: var(--color-glow);
  outline: none;
}

.page-privacy .panel-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.page-privacy .panel-contact > p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.page-privacy .panel-more {
  margin-top: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(176, 190, 197, 0.15);
}

/* CTA */
.page-privacy .privacy-cta {
  text-align: center;
  padding-top: var(--space-lg);
}

.page-privacy .cta-deco {
  margin: 0 auto var(--space-lg);
  max-width: 60px;
  height: 2px;
  background: linear-gradient(135deg, var(--color-border-start), var(--color-border-end));
  opacity: 0.5;
  border: none;
}

.page-privacy .cta-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-lg) 0;
}

.page-privacy .btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--transition), transform 0.15s ease, box-shadow var(--transition);
  user-select: none;
}

.page-privacy .btn:hover,
.page-privacy .btn:focus-visible {
  background: var(--color-glow);
  transform: scale(1.03);
  box-shadow: 0 0 20px rgba(0, 188, 212, 0.3);
  outline: none;
}

.page-privacy .btn:active {
  transform: scale(0.97);
}

/* 响应式：桌面端 ≥768px */
@media (min-width: 768px) {
  .page-privacy .privacy-container {
    padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  }

  .page-privacy .privacy-hero {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-lg) var(--space-md);
  }

  .page-privacy .privacy-shield {
    width: 64px;
    height: 64px;
  }

  .page-privacy .privacy-title {
    font-size: 2.75rem;
    flex: 1 1 auto;
  }

  .page-privacy .privacy-subtitle {
    flex: 0 0 100%;
    font-size: 1.0625rem;
    margin-top: -0.5rem;
  }

  .page-privacy .tab-nav {
    flex-wrap: nowrap;
    gap: 0;
    padding-bottom: 0;
    border-bottom: 1px solid rgba(176, 190, 197, 0.2);
    justify-content: flex-start;
  }

  .page-privacy .tab-label {
    padding: var(--space-sm) var(--space-lg);
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
  }

  .page-privacy .tab-label::after {
    bottom: -1px;
    height: 2px;
  }

  .page-privacy .tab-panel {
    padding: var(--space-xl) var(--space-lg);
  }

  .page-privacy .panel-heading {
    font-size: 1.5rem;
  }

  .page-privacy .panel-list {
    gap: var(--space-lg);
  }

  .page-privacy .panel-list li {
    font-size: 1rem;
    padding-left: 1.75rem;
  }

  .page-privacy .panel-list li::before {
    top: 0.65em;
    width: 7px;
    height: 7px;
  }

  .page-privacy .privacy-cta {
    padding-top: var(--space-2xl);
  }

  .page-privacy .cta-text {
    font-size: 1rem;
  }
}

/* 大桌面端 ≥1024px */
@media (min-width: 1024px) {
  .page-privacy .privacy-container {
    padding: var(--space-2xl) var(--space-xl);
  }

  .page-privacy .privacy-title {
    font-size: 3.25rem;
  }

  .page-privacy .privacy-subtitle {
    font-size: 1.125rem;
    max-width: 720px;
  }

  .page-privacy .tab-panel {
    padding: var(--space-2xl) var(--space-xl);
  }
}