:root {
  --site-bg: #f7f8fa;
  --site-surface: #ffffff;
  --site-text: #252a31;
  --site-muted: #667085;
  --site-border: rgba(37, 42, 49, 0.1);
  --site-accent: #2f6fbd;
  --site-radius-sm: 0.375rem;
  --site-radius: 0.625rem;
  --site-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 6px 18px rgba(0, 0, 0, 0.05);
  --site-space-1: 0.25rem;
  --site-space-2: 0.5rem;
  --site-space-3: 0.75rem;
  --site-space-4: 1rem;
  --site-space-6: 1.5rem;
  --site-space-8: 2rem;
  --site-motion: 180ms cubic-bezier(0.2, 0, 0, 1);
  --site-font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --site-font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html {
  background: var(--site-bg);
}

body {
  color: var(--site-text);
  font-family: var(--site-font-sans) !important;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(47, 111, 189, 0.18);
}

a,
button,
.button {
  transition: color var(--site-motion), background-color var(--site-motion), border-color var(--site-motion), opacity var(--site-motion), transform var(--site-motion);
}

a:focus-visible,
button:focus-visible,
.button:focus-visible {
  border-radius: var(--site-radius-sm);
  outline: 2px solid var(--site-accent);
  outline-offset: 3px;
}

.navbar-main {
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--site-border);
  box-shadow: none;
}

.navbar-main .navbar-item {
  color: var(--site-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.navbar-main .navbar-item:hover,
.navbar-main .navbar-item.is-active {
  background: transparent;
  color: var(--site-accent);
}

.navbar-logo img {
  border-radius: var(--site-radius-sm);
}

body > .section {
  padding-top: var(--site-space-8);
}

.card {
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
  overflow: clip;
}

.column-main > .card + .card {
  margin-top: var(--site-space-6);
}

article.article .title {
  color: var(--site-text);
  font-weight: 600;
  letter-spacing: -0.018em;
  line-height: 1.25;
  text-wrap: balance;
}

article.article .article-meta,
article.article .article-tags {
  color: var(--site-muted);
  font-variant-numeric: tabular-nums;
}

article.article .article-meta {
  overflow-x: visible;
}

article.article .article-meta .level-left {
  flex-wrap: wrap;
  gap: var(--site-space-1) var(--site-space-3);
}

article.article .article-meta .level-item {
  flex-shrink: 1;
  margin-right: 0;
}

article.article .content {
  color: var(--site-text);
  font-size: 1.0625rem;
  line-height: 1.8;
  text-wrap: pretty;
}

article.article .content p,
article.article .content ul,
article.article .content ol,
article.article .content blockquote {
  margin-bottom: var(--site-space-6);
}

article.article .content h2,
article.article .content h3,
article.article .content h4 {
  color: var(--site-text);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.35;
  scroll-margin-top: 5rem;
  text-wrap: balance;
}

article.article .content h2 {
  margin-top: 2.5rem;
}

article.article .content h3 {
  margin-top: 2rem;
}

article.article .content code,
article.article .content pre {
  font-family: var(--site-font-mono);
}

article.article .content table {
  font-variant-numeric: tabular-nums;
}

article.article .content img {
  border-radius: var(--site-radius-sm);
  height: auto;
}

article.article .content .article-excerpt > :first-child {
  margin-top: 0;
}

article.article .content .article-excerpt > :last-child {
  margin-bottom: 0;
}

article.article .content .article-excerpt h2,
article.article .content .article-excerpt h3,
article.article .content .article-excerpt h4 {
  font-size: 1.0625rem;
  margin-block: var(--site-space-4) var(--site-space-2);
}

article.article .content .article-excerpt p,
article.article .content .article-excerpt ul,
article.article .content .article-excerpt ol,
article.article .content .article-excerpt blockquote {
  margin-bottom: var(--site-space-3);
}

.header-anchor {
  color: var(--site-muted);
  opacity: 0;
}

h2:hover > .header-anchor,
h3:hover > .header-anchor,
h4:hover > .header-anchor,
.header-anchor:focus-visible {
  opacity: 1;
}

.article-more.button {
  background: transparent;
  border-color: var(--site-border);
  border-radius: var(--site-radius-sm);
  color: var(--site-accent);
  font-weight: 500;
}

.article-more.button:hover {
  background: rgba(47, 111, 189, 0.08);
  border-color: rgba(47, 111, 189, 0.3);
}

#toc .menu-list a {
  border-radius: var(--site-radius-sm);
  color: var(--site-muted);
  line-height: 1.45;
}

#toc .menu-list a:hover,
#toc .menu-list a.is-active {
  background: rgba(47, 111, 189, 0.08);
  color: var(--site-accent);
}

.footer {
  background: transparent;
  color: var(--site-muted);
}

.mobile-toc-toggle,
.mobile-toc-dialog {
  display: none;
}

@media screen and (max-width: 768px) {
  .navbar-main .navbar-container {
    align-items: stretch;
    display: flex;
    overflow: visible;
  }

  .navbar-main .navbar-brand {
    flex: 0 0 auto;
  }

  .navbar-main .navbar-menu {
    display: flex;
    flex: 1 1 auto;
    min-width: 0;
    overflow: visible;
  }

  .navbar-main .navbar-start {
    flex: 1 1 auto;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .navbar-main .navbar-start::-webkit-scrollbar {
    display: none;
  }

  .navbar-main .navbar-end {
    flex: 0 0 auto;
  }

  .navbar-main .navbar-item {
    min-height: 2.75rem;
    padding: var(--site-space-3) var(--site-space-2);
  }

  .navbar-main .navbar-logo {
    padding-left: var(--site-space-3);
    padding-right: var(--site-space-3);
  }

  body > .section {
    padding: var(--site-space-4) var(--site-space-3);
  }

  .card-content {
    padding: var(--site-space-6);
  }

  article.article .content {
    font-size: 1rem;
    line-height: 1.75;
  }

  article.article .article-meta .level-left {
    align-items: flex-start;
  }

  .header-anchor {
    opacity: 0.45;
  }

  .mobile-toc-toggle {
    background: var(--site-surface);
    border: 1px solid var(--site-border);
    bottom: var(--site-space-4);
    box-shadow: var(--site-shadow);
    color: var(--site-accent);
    display: inline-flex;
    font-weight: 600;
    left: var(--site-space-4);
    position: fixed;
    z-index: 30;
  }

  .mobile-toc-dialog[open] {
    background: var(--site-surface);
    border: 1px solid var(--site-border);
    border-radius: var(--site-radius);
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.18);
    color: var(--site-text);
    display: block;
    margin: auto;
    max-height: min(80vh, 42rem);
    max-width: calc(100vw - 2rem);
    overflow: auto;
    padding: var(--site-space-4);
    width: 22rem;
  }

  .mobile-toc-dialog::backdrop {
    background: rgba(32, 36, 43, 0.35);
    backdrop-filter: blur(2px);
  }

  .mobile-toc-dialog .mobile-toc-header {
    align-items: center;
    border-bottom: 1px solid var(--site-border);
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--site-space-3);
    padding-bottom: var(--site-space-3);
  }

  .mobile-toc-dialog .menu-list a {
    border-radius: var(--site-radius-sm);
    color: var(--site-muted);
    padding: var(--site-space-2);
  }

  .mobile-toc-dialog .menu-list a:active {
    background: rgba(47, 111, 189, 0.08);
    color: var(--site-accent);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}