/* 灵狗翻译 (Lingo Translate) - Legal & Policy Stylesheet */
:root {
  --bg: #090d16;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-soft: rgba(30, 41, 59, 0.5);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-faint: #94a3b8;
  --link: #a5b4fc;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --header-bg: rgba(9, 13, 22, 0.85);
  --badge-bg: rgba(99, 102, 241, 0.12);
  --badge-text: #a5b4fc;
  --badge-border: rgba(99, 102, 241, 0.25);
  --highlight-box-bg: rgba(99, 102, 241, 0.06);
  --highlight-box-border: rgba(99, 102, 241, 0.2);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

:root.light-theme {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-soft: #f1f5f9;
  --border: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(15, 23, 42, 0.16);
  --text: #0f172a;
  --text-muted: #475569;
  --text-faint: #64748b;
  --link: #4338ca;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --header-bg: rgba(248, 250, 252, 0.88);
  --badge-bg: rgba(79, 70, 229, 0.08);
  --badge-text: #4f46e5;
  --badge-border: rgba(79, 70, 229, 0.2);
  --highlight-box-bg: rgba(79, 70, 229, 0.04);
  --highlight-box-border: rgba(79, 70, 229, 0.16);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
}

.nav-brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  list-style: none;
  white-space: nowrap;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active {
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.action-btn {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  min-height: 40px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.action-btn:hover {
  border-color: var(--border-hover);
  background: var(--border-hover);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.language-picker {
  display: inline-flex;
  align-items: center;
}

.language-picker select {
  max-width: 132px;
  min-height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.language-picker select:hover {
  border-color: var(--border-hover);
  background: var(--border-hover);
}

.language-picker select:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 4px;
}

.language-picker option {
  color: var(--text);
  background: var(--bg);
}

/* Main Content */
.legal-main {
  flex: 1;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.legal-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  margin-bottom: 16px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--primary);
}

.legal-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.legal-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

/* Summary Box */
.summary-box {
  background: var(--highlight-box-bg);
  border: 1px solid var(--highlight-box-border);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 36px;
}

.summary-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 8px;
}

.summary-list {
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Document Sections */
.legal-content section {
  margin-bottom: 32px;
}

.legal-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.legal-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 18px 0 8px;
}

.legal-content p {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-bottom: 12px;
}

.legal-content ul,
.legal-content ol {
  color: var(--text-muted);
  font-size: 0.93rem;
  padding-left: 22px;
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.legal-content li strong {
  color: var(--text);
}

.legal-content a {
  color: var(--link);
  text-underline-offset: 3px;
}

.legal-content a:hover {
  text-decoration: underline;
}

.legal-content code {
  font-family: var(--font-mono);
  background: var(--bg-soft);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--link);
  overflow-wrap: anywhere;
}

.legal-content p,
.legal-content li {
  overflow-wrap: anywhere;
}

.document-toc {
  margin: -12px 0 32px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  padding: 14px 18px;
}

.document-toc summary {
  cursor: pointer;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
}

.document-toc ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 20px;
  list-style: none;
  margin-top: 16px;
}

.document-toc a {
  color: var(--link);
  font-size: 0.9rem;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Language Visibility */
body[data-lang="zh"] .lang-en {
  display: none !important;
}

body[data-lang="en"] .lang-zh {
  display: none !important;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  color: var(--text-faint);
  font-size: 0.85rem;
  text-align: center;
  background: var(--bg);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 110px;
  }
  .header-container {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px 16px;
    padding-top: 12px;
    padding-bottom: 10px;
    padding-left: 16px;
    padding-right: 16px;
  }
  .nav-brand {
    grid-column: 1;
    grid-row: 1;
    font-size: 0.95rem;
    gap: 8px;
  }
  .nav-actions {
    grid-column: 2;
    grid-row: 1;
    gap: 6px;
  }
  .nav-links {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    gap: 22px;
    overflow-x: auto;
    padding: 4px 2px;
  }
  .nav-links a {
    display: inline-block;
    padding: 5px 0;
  }
  .action-btn {
    padding: 8px 10px;
  }
  .language-picker select {
    min-height: 36px;
    padding: 6px 10px;
    font-size: 0.82rem;
  }
  .legal-title {
    font-size: 1.6rem;
  }
  .legal-main {
    padding: 32px 16px 60px;
  }
  .summary-box {
    padding: 16px;
  }
  .document-toc ol {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}