/* info 说明页（帮助 / 政策 / 联系等） */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #171717;
  background: #f9fafb;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul,
ol {
  list-style: none;
}

.min-h-screen {
  min-height: 100vh;
}

.bg-white {
  background: #fff;
}

.bg-gray-50 {
  background: #f9fafb;
}

.border-b {
  border-bottom: 1px solid #f3f4f6;
}

.border-t {
  border-top: 1px solid #f3f4f6;
}

.shadow-sm {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.max-w-7xl {
  max-width: 80rem;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-3 {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.py-8 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid #f3f4f6;
}

.site-header nav {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: #111827;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.25rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: #374151;
}

.nav-links a:hover {
  color: #2563eb;
}

.breadcrumb {
  background: #f9fafb;
  border-bottom: 1px solid #f3f4f6;
}

.breadcrumb ol {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  overflow-x: auto;
}

.breadcrumb a {
  color: #2563eb;
}

.breadcrumb .current {
  color: #374151;
  font-weight: 500;
}

.sep {
  color: #9ca3af;
}

main.doc-main {
  max-width: 80rem;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.page-seo-intro {
  max-width: 48rem;
  margin: 0 0 1.5rem;
}

.page-seo-intro h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  line-height: 2rem;
  font-weight: 700;
  color: #111827;
}

.page-seo-intro p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.625;
  color: #4b5563;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .page-seo-intro h1 {
    font-size: 1.875rem;
    line-height: 2.25rem;
  }

  .page-seo-intro p {
    font-size: 1rem;
  }

  .site-header nav,
  .breadcrumb ol,
  main.doc-main {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .site-header nav,
  .breadcrumb ol,
  main.doc-main {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.doc-article {
  max-width: 48rem;
  color: #374151;
  font-size: 0.9375rem;
  line-height: 1.75;
}

.doc-article h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
}

.doc-article h2:first-of-type {
  margin-top: 0.5rem;
}

.doc-article h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #1f2937;
}

.doc-article p,
.doc-article ul,
.doc-article ol {
  margin: 0 0 0.85rem;
}

.doc-article ul {
  list-style: disc;
  padding-left: 1.25rem;
}

.doc-article ol {
  list-style: decimal;
  padding-left: 1.25rem;
}

.doc-article li {
  margin: 0.35rem 0;
}

.doc-article a {
  color: #2563eb;
}

.doc-article a:hover {
  text-decoration: underline;
}

.doc-article .meta {
  margin-bottom: 1.5rem;
  font-size: 0.8125rem;
  color: #6b7280;
}

.doc-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid #e5e7eb;
  font-size: 0.875rem;
}

.doc-nav-links a {
  color: #2563eb;
}

.site-footer {
  background: #f9fafb;
  border-top: 1px solid #f3f4f6;
  padding: 2rem 1rem;
  text-align: center;
  color: #6b7280;
  font-size: 0.875rem;
}

.site-footer a {
  color: #2563eb;
}

.mobile-menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: 0.375rem;
  background: transparent;
  color: #374151;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem 1rem;
  background: #fff;
  border-bottom: 1px solid #f3f4f6;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  padding: 0.65rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  color: #374151;
}

.mobile-menu a:hover {
  background: #f3f4f6;
  color: #2563eb;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }

  .mobile-menu {
    display: none !important;
  }
}