:root {
  --bright-bg: #f8fbfc;
  --bright-surface: #ffffff;
  --bright-mist: #f1f6f8;
  --bright-ink: #0f2742;
  --bright-muted: #526478;
  --bright-soft: #6c7d90;
  --bright-line: #dce7ec;
  --bright-emerald: #007f61;
  --bright-cyan: #087e98;
  --bright-amber: #a56909;
  --bright-emerald-soft: #dff8ef;
  --bright-cyan-soft: #ddf6fa;
  --sans: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 0.15s ease;
}

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

html {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--bright-ink);
  background-color: var(--bright-bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 1000;
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  color: #fff;
  background: var(--bright-cyan);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--bright-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--bright-line);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  min-width: 0;
  text-decoration: none;
}

.brand-lockup {
  display: block;
  width: auto;
  height: 38px;
  max-width: 198px;
  object-fit: contain;
}

.nav-actions,
.nav-menu {
  display: flex;
  align-items: center;
}

.nav-actions {
  gap: 1.25rem;
}

.nav-menu {
  gap: 1.5rem;
  list-style: none;
}

.nav-menu a {
  color: var(--bright-muted);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--bright-cyan);
}

.lang-select-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--bright-line);
  border-radius: var(--radius-sm);
  padding: 0.4rem 2rem 0.4rem 0.75rem;
  color: var(--bright-ink);
  background-color: var(--bright-mist);
  font-family: var(--sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.lang-select:hover {
  border-color: var(--bright-soft);
}

.lang-select-wrapper::after {
  content: "";
  position: absolute;
  right: 0.75rem;
  width: 0;
  height: 0;
  border-top: 5px solid var(--bright-muted);
  border-right: 4px solid transparent;
  border-left: 4px solid transparent;
  pointer-events: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border-radius: var(--radius-md);
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-outline {
  border: 1px solid var(--bright-line);
  color: var(--bright-ink);
  background-color: transparent;
}

.btn-outline:hover {
  border-color: var(--bright-soft);
  background-color: var(--bright-mist);
}

.btn-primary {
  border: 1px solid var(--bright-emerald);
  color: #fff;
  background-color: var(--bright-emerald);
}

.btn-primary:hover {
  border-color: #006e54;
  background-color: #006e54;
}

.legal-main {
  flex: 1;
  padding: 2.5rem 0 4rem;
}

.legal-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
}

.toc-sidebar {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  border: 1px solid var(--bright-line);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  background: var(--bright-surface);
}

.toc-title {
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
  color: var(--bright-soft);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  list-style: none;
}

.toc-link {
  display: block;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.5rem;
  color: var(--bright-muted);
  font-size: 0.84rem;
  line-height: 1.35;
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.toc-link:hover {
  color: var(--bright-ink);
  background-color: var(--bright-mist);
}

.toc-link.active {
  border-left-color: var(--bright-cyan);
  color: var(--bright-cyan);
  background-color: var(--bright-cyan-soft);
  font-weight: 700;
}

.mobile-toc {
  display: none;
  position: sticky;
  top: 72px;
  z-index: 90;
  border-bottom: 1px solid var(--bright-line);
  padding: 0.75rem 1.5rem;
  background-color: var(--bright-surface);
}

.mobile-toc summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--bright-ink);
  font-size: 0.875rem;
  font-weight: 700;
  list-style-type: none;
  cursor: pointer;
}

.mobile-toc summary::after {
  content: "+";
  color: var(--bright-muted);
}

.mobile-toc[open] summary::after {
  content: "-";
}

.mobile-toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
  margin-top: 0.75rem;
  border-top: 1px solid var(--bright-line);
  padding-top: 0.5rem;
  list-style: none;
}

.mobile-toc-list a {
  color: var(--bright-muted);
  font-size: 0.875rem;
  text-decoration: none;
}

.mobile-toc-list a:hover {
  color: var(--bright-cyan);
}

.legal-article {
  width: 100%;
  max-width: 840px;
}

.legal-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--bright-line);
  padding-bottom: 2rem;
}

.legal-tag {
  display: inline-block;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  color: var(--bright-emerald);
  background-color: var(--bright-emerald-soft);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

.legal-title {
  margin-bottom: 0.75rem;
  color: var(--bright-ink);
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0;
}

.legal-meta {
  color: var(--bright-soft);
  font-size: 0.875rem;
}

.legal-summary-box {
  margin-bottom: 2.5rem;
  border: 1px solid var(--bright-line);
  border-left: 4px solid var(--bright-cyan);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  background-color: var(--bright-mist);
}

.legal-summary-box h2 {
  margin-bottom: 0.5rem;
  color: var(--bright-ink);
  font-size: 0.9375rem;
  font-weight: 700;
}

.legal-summary-box p {
  color: var(--bright-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.legal-section {
  scroll-margin-top: 100px;
  margin-bottom: 2.5rem;
  padding-top: 1.5rem;
}

.legal-section:not(:last-child) {
  border-bottom: 1px solid var(--bright-line);
  padding-bottom: 2.5rem;
}

.legal-section h2 {
  margin-bottom: 1rem;
  color: var(--bright-ink);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0;
}

.legal-section p {
  margin-bottom: 1rem;
  color: var(--bright-ink);
  font-size: 0.95rem;
}

.legal-section ul,
.legal-section ol {
  margin: 0.5rem 0 1rem;
  padding-left: 1.5rem;
}

.legal-section li {
  margin-bottom: 0.5rem;
  color: var(--bright-ink);
  font-size: 0.95rem;
}

.legal-section strong {
  color: var(--bright-ink);
  font-weight: 700;
}

.legal-section a {
  color: var(--bright-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-section a:hover {
  color: #006f86;
}

.notice-warning {
  margin: 1rem 0;
  border: 1px solid #e8ce98;
  border-left: 4px solid var(--bright-amber);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  color: #5d420d;
  background-color: #fff9ed;
  font-size: 0.9rem;
}

.footer {
  margin-top: auto;
  border-top: 1px solid var(--bright-line);
  padding: 2.5rem 0 2rem;
  background-color: var(--bright-surface);
}

.footer-inner,
.footer-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-inner {
  gap: 1.25rem;
  text-align: center;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--bright-muted);
  font-size: 0.875rem;
  text-decoration: none;
}

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

.footer-copy {
  gap: 0.35rem;
  color: var(--bright-soft);
  font-size: 0.8125rem;
}

.footer-icp {
  color: var(--bright-soft);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-icp:hover {
  color: var(--bright-muted);
  text-decoration: underline;
}

@media (max-width: 960px) {
  .legal-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .toc-sidebar {
    display: none;
  }

  .mobile-toc {
    display: block;
  }

  .legal-article {
    max-width: none;
  }

  .legal-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 720px) {
  .nav-inner {
    min-height: 64px;
  }

  .mobile-toc {
    top: 64px;
  }

  .nav-menu,
  .nav-actions .btn {
    display: none;
  }

  .legal-main {
    padding-top: 2rem;
  }
}

@media (max-width: 420px) {
  .container {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .brand-lockup {
    height: 31px;
    max-width: 161px;
  }

  .legal-title {
    font-size: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}