/* AI Proxy Node 文档站 — VitePress 风格 */
:root {
  --c-text: #0f172a;
  --c-text-2: #475569;
  --c-text-3: #64748b;
  --c-bg: #ffffff;
  --c-bg-soft: #f8fafc;
  --c-bg-code: #1e293b;
  --c-border: #e2e8f0;
  --c-border-soft: #f1f5f9;
  --c-brand-from: #3b82f6;
  --c-brand-to: #8b5cf6;
  --c-brand: #6366f1;
  --c-link: #3b82f6;
  --c-warn-bg: #fffbeb;
  --c-warn-border: #fde68a;
  --c-info-bg: #eff6ff;
  --c-info-border: #bfdbfe;
  --c-tip-bg: #f0fdf4;
  --c-tip-border: #bbf7d0;
  --shadow-sm: 0 1px 2px 0 rgba(15,23,42,.05);
  --shadow-md: 0 4px 6px -1px rgba(15,23,42,.1);
  --font-base: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --font-code: 'SF Mono', 'Cascadia Code', 'Source Code Pro', Consolas, Monaco, 'Courier New', monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-base);
  color: var(--c-text);
  background: var(--c-bg);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--c-link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* TOPBAR */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar .brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; color: var(--c-text);
  text-decoration: none;
}
.topbar .brand img { height: 28px; }
.topbar nav { display: flex; gap: 28px; align-items: center; }
.topbar nav a {
  font-size: 14px; font-weight: 500; color: var(--c-text-2);
}
.topbar nav a:hover { color: var(--c-text); text-decoration: none; }
.topbar .cta {
  background: linear-gradient(135deg, var(--c-brand-from) 0%, var(--c-brand-to) 100%);
  color: #fff !important;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 8px;
}
.topbar .cta:hover { text-decoration: none; opacity: .95; }

/* LAYOUT */
.layout {
  display: grid;
  grid-template-columns: 240px 1fr 200px;
  gap: 32px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
@media (max-width: 1024px) {
  .layout { grid-template-columns: 220px 1fr; }
  .toc { display: none; }
}
@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; padding: 16px; }
  .sidebar { display: none; }
}

/* SIDEBAR */
.sidebar {
  position: sticky; top: 96px;
  align-self: start;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  padding-right: 8px;
}
.sidebar h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text);
  margin: 16px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sidebar h3:first-child { margin-top: 0; }
.sidebar ul { list-style: none; padding: 0; margin: 0 0 16px; }
.sidebar ul li { margin: 0; }
.sidebar ul li a {
  display: block;
  padding: 6px 12px;
  border-left: 2px solid transparent;
  color: var(--c-text-2);
  font-size: 14px;
  border-radius: 0 6px 6px 0;
  transition: all .15s;
}
.sidebar ul li a:hover {
  color: var(--c-text);
  background: var(--c-bg-soft);
  text-decoration: none;
}
.sidebar ul li a.active {
  color: var(--c-brand);
  font-weight: 600;
  border-left-color: var(--c-brand);
  background: var(--c-bg-soft);
}

/* CONTENT */
.content {
  min-width: 0;
  max-width: 760px;
}
.content h1 {
  font-size: 36px; font-weight: 800;
  margin: 0 0 12px;
  letter-spacing: -0.5px;
}
.content .lead {
  font-size: 18px; color: var(--c-text-2);
  margin: 0 0 32px;
  line-height: 1.55;
}
.content h2 {
  font-size: 26px; font-weight: 700;
  margin: 48px 0 16px;
  padding-top: 16px;
  scroll-margin-top: 96px;
}
.content h3 {
  font-size: 19px; font-weight: 700;
  margin: 32px 0 12px;
  scroll-margin-top: 96px;
}
.content p { margin: 0 0 16px; }
.content ul, .content ol { padding-left: 24px; margin: 0 0 16px; }
.content ul li, .content ol li { margin: 6px 0; line-height: 1.7; }
.content code:not(pre code) {
  background: var(--c-bg-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-code);
  font-size: 13.5px;
  color: #be185d;
  border: 1px solid var(--c-border-soft);
}

/* CODE BLOCKS */
.code-block {
  position: relative;
  background: var(--c-bg-code);
  border-radius: 10px;
  margin: 16px 0 24px;
  overflow: hidden;
}
.code-block .code-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 16px;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.code-block .code-lang {
  color: #94a3b8;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.code-block .copy-btn {
  background: transparent;
  color: #94a3b8;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font-base);
  transition: all .15s;
}
.code-block .copy-btn:hover {
  color: #fff;
  border-color: rgba(255,255,255,.3);
}
.code-block pre {
  margin: 0;
  padding: 16px 20px;
  overflow-x: auto;
  font-family: var(--font-code);
  font-size: 13.5px;
  line-height: 1.65;
  color: #e2e8f0;
}
.code-block .tok-keyword { color: #c084fc; }
.code-block .tok-string { color: #86efac; }
.code-block .tok-comment { color: #64748b; font-style: italic; }
.code-block .tok-builtin { color: #fbbf24; }

/* CALLOUTS */
.callout {
  border-left: 3px solid;
  padding: 12px 18px;
  margin: 20px 0;
  border-radius: 0 8px 8px 0;
}
.callout-title { font-weight: 700; font-size: 14px; margin-bottom: 4px; }
.callout p { margin: 0; font-size: 14px; }
.callout.info  { background: var(--c-info-bg);  border-color: #3b82f6; }
.callout.info  .callout-title { color: #1e40af; }
.callout.warn  { background: var(--c-warn-bg);  border-color: #f59e0b; }
.callout.warn  .callout-title { color: #92400e; }
.callout.tip   { background: var(--c-tip-bg);   border-color: #10b981; }
.callout.tip   .callout-title { color: #065f46; }

/* TABLES */
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
}
.content th {
  text-align: left;
  padding: 10px 12px;
  background: var(--c-bg-soft);
  border-bottom: 2px solid var(--c-border);
  font-weight: 700;
}
.content td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-border-soft);
}
.content td code {
  font-size: 13px;
}

/* TOC right rail */
.toc {
  position: sticky; top: 96px;
  align-self: start;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  font-size: 13px;
  border-left: 1px solid var(--c-border);
  padding-left: 16px;
}
.toc h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-text-3);
  margin: 0 0 10px;
}
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc ul li { margin: 4px 0; }
.toc ul li a {
  display: block;
  padding: 4px 8px;
  color: var(--c-text-2);
  font-size: 13px;
  border-radius: 6px;
  border-left: 2px solid transparent;
}
.toc ul li a:hover {
  color: var(--c-text);
  background: var(--c-bg-soft);
  text-decoration: none;
}
.toc ul li.h3 a { padding-left: 16px; }

/* FOOTER */
.docs-footer {
  border-top: 1px solid var(--c-border);
  margin-top: 64px;
  padding: 32px 24px;
  text-align: center;
  color: var(--c-text-3);
  font-size: 13px;
  line-height: 1.8;
}
.docs-footer a { color: var(--c-text-3); margin: 0 8px; }

/* Hero (used on index) */
.hero {
  text-align: center;
  padding: 48px 0 24px;
}
.hero h1 {
  font-size: 48px; font-weight: 800; line-height: 1.15;
  margin: 0 0 16px; letter-spacing: -0.8px;
}
.hero .hero-sub {
  font-size: 18px; color: var(--c-text-2);
  max-width: 640px; margin: 0 auto 32px;
  line-height: 1.6;
}
.hero .cta-row {
  display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
}
.hero .btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px; font-weight: 600;
  text-decoration: none;
  transition: all .15s;
}
.hero .btn-primary {
  background: linear-gradient(135deg, var(--c-brand-from) 0%, var(--c-brand-to) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99,102,241,.3);
}
.hero .btn-primary:hover { opacity: .94; text-decoration: none; }
.hero .btn-ghost {
  background: #fff; color: var(--c-text);
  border: 1px solid var(--c-border);
}
.hero .btn-ghost:hover {
  text-decoration: none;
  border-color: var(--c-brand);
  color: var(--c-brand);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 48px 0;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: 14px;
  padding: 22px;
}
.feature-card .icon { font-size: 22px; margin-bottom: 10px; }
.feature-card h3 { margin: 0 0 6px; font-size: 16px; font-weight: 700; }
.feature-card p { margin: 0; font-size: 14px; color: var(--c-text-3); line-height: 1.55; }