/* ═══════════════════════════════════════════════════════════════════
   AI 基础能力平台 — 共享样式表
   适用于所有架构文档子页面
   ═══════════════════════════════════════════════════════════════════ */

:root {
  color-scheme: light;
  --primary: #2563eb;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --warning: #ea580c;
  --warning-bg: #fff7ed;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --info: #0284c7;
  --info-bg: #f0f9ff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 150ms ease;

  /* Layer theme colors */
  --l1: #2563eb; --l1-bg: #eff6ff; --l1-border: #bfdbfe;
  --l2: #7c3aed; --l2-bg: #f5f3ff; --l2-border: #ddd6fe;
  --l3: #db2777; --l3-bg: #fdf2f8; --l3-border: #fbcfe8;
  --l4: #ea580c; --l4-bg: #fff7ed; --l4-border: #fed7aa;
  --l5: #16a34a; --l5-bg: #f0fdf4; --l5-border: #bbf7d0;
  --l6: #0891b2; --l6-bg: #ecfeff; --l6-border: #a5f3fc;
  --l7: #4f46e5; --l7-bg: #eef2ff; --l7-border: #c7d2fe;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg-secondary);
  line-height: 1.7;
  font-size: 15px;
}

/* ── Breadcrumb ── */
.breadcrumb {
  padding: 12px 24px;
  font-size: 13px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-muted); }
.breadcrumb .current { color: var(--text); font-weight: 600; }

/* ── Top Bar ── */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}
.topbar .logo {
  font-weight: 700; font-size: 17px; color: var(--primary-dark);
  display: flex; align-items: center; gap: 8px; text-decoration: none;
}
.topbar .logo .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); display: inline-block; animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%, 100% { opacity:1; transform:scale(1); } 50% { opacity:0.5; transform:scale(1.3); } }
.topbar nav { display: flex; gap: 2px; }
.topbar nav a {
  padding: 6px 12px; border-radius: 6px;
  text-decoration: none; color: var(--text-secondary); font-size: 13px; font-weight: 500;
  transition: var(--transition);
}
.topbar nav a:hover, .topbar nav a.active { background: var(--primary-light); color: var(--primary); }

/* ── Layout ── */
.layout { display: flex; max-width: 1400px; margin: 0 auto; }

/* ── Sidebar ── */
.sidebar {
  position: sticky; top: 56px;
  width: 260px; min-width: 260px; height: calc(100vh - 56px);
  overflow-y: auto; padding: 24px 16px;
  border-right: 1px solid var(--border); background: var(--bg);
}
.sidebar .section-title {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-muted); margin: 20px 0 6px 8px;
}
.sidebar .section-title:first-child { margin-top: 0; }
.sidebar a {
  display: block; padding: 7px 8px 7px 12px; border-radius: 6px;
  text-decoration: none; color: var(--text-secondary); font-size: 13px;
  border-left: 2px solid transparent; transition: var(--transition);
}
.sidebar a:hover, .sidebar a.active { background: var(--primary-light); color: var(--primary); border-left-color: var(--primary); }
.sidebar a.sub { padding-left: 28px; font-size: 12px; }

/* ── Main Content ── */
.main { flex: 1; min-width: 0; padding: 32px 40px; background: var(--bg); min-height: calc(100vh - 56px); }
.main h1 { font-size: 30px; font-weight: 800; color: var(--text); margin-bottom: 8px; letter-spacing: -0.02em; line-height: 1.25; }
.main h2 { font-size: 22px; font-weight: 700; color: var(--text); margin-top: 44px; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 2px solid var(--border); letter-spacing: -0.01em; }
.main h3 { font-size: 17px; font-weight: 600; color: var(--text); margin-top: 28px; margin-bottom: 12px; }
.main h4 { font-size: 15px; font-weight: 600; color: var(--text-secondary); margin-top: 20px; margin-bottom: 8px; }
.main p { margin-bottom: 14px; color: var(--text-secondary); }
.main ul, .main ol { margin: 0 0 16px 20px; color: var(--text-secondary); }
.main li { margin-bottom: 4px; }
.main a { color: var(--primary); text-decoration: none; }
.main a:hover { text-decoration: underline; }
.main code { background: var(--bg-tertiary); padding: 2px 6px; border-radius: 4px; font-size: 13px; font-family: 'SF Mono','Fira Code','Consolas',monospace; }
.main pre {
  background: #1e293b; color: #e2e8f0; padding: 20px; border-radius: var(--radius-lg);
  overflow-x: auto; font-size: 13px; line-height: 1.6; margin-bottom: 20px;
  font-family: 'SF Mono','Fira Code','Consolas',monospace;
}
.main pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }
.main blockquote {
  border-left: 3px solid var(--primary); padding: 12px 20px; margin: 16px 0;
  background: var(--primary-light); border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--primary-dark); font-size: 14px;
}

/* ── Meta Banner ── */
.meta-banner {
  background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
  border: 1px solid #bfdbfe; border-radius: var(--radius-lg);
  padding: 16px 24px; margin-bottom: 24px;
  display: flex; gap: 24px; flex-wrap: wrap; font-size: 13px; color: var(--text-secondary);
}
.meta-banner span { display: flex; align-items: center; gap: 6px; }
.meta-banner .label { font-weight: 600; color: var(--text); }

/* ── Tables ── */
.main table {
  width: 100%; border-collapse: collapse; margin: 16px 0 24px;
  font-size: 14px; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.main th { background: var(--bg-tertiary); padding: 10px 14px; text-align: left; font-weight: 600; color: var(--text); border-bottom: 2px solid var(--border); font-size: 13px; }
.main td { padding: 10px 14px; border-bottom: 1px solid var(--border-light); color: var(--text-secondary); }
.main tr:hover td { background: var(--bg-secondary); }
.main tr:last-child td { border-bottom: none; }

/* ── Card Grid ── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; margin: 20px 0 32px; }
.card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px;
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }
.card h4 { margin: 0 0 8px; font-size: 15px; color: var(--text); }
.card p { margin: 0; font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ── Boundary Specification Box ── */
.boundary-box {
  border: 1px dashed var(--border); border-radius: var(--radius-lg);
  padding: 20px 24px; margin: 24px 0; position: relative;
  background: var(--bg-secondary);
}
.boundary-box::before {
  content: '边界规范'; position: absolute; top: -10px; left: 20px;
  background: var(--bg); padding: 0 10px; font-size: 12px; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em;
}
.boundary-box .boundary-item { margin-bottom: 12px; }
.boundary-box .boundary-item:last-child { margin-bottom: 0; }
.boundary-box .boundary-label {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 11px; font-weight: 700; margin-right: 8px; letter-spacing: 0.02em;
}
.boundary-label.up { background: #dbeafe; color: #1e40af; }
.boundary-label.down { background: #fce7f3; color: #9d174d; }
.boundary-label.same { background: #dcfce7; color: #15803d; }

/* ── Association Diagram ── */
.assoc-diagram { margin: 20px 0; text-align: center; }
.assoc-diagram svg { max-width: 100%; height: auto; }

/* ── Info/Callout Boxes ── */
.info-box, .warn-box, .success-box, .design-box {
  padding: 16px 20px; border-radius: var(--radius-lg); margin: 16px 0;
  border-left: 4px solid; font-size: 14px;
}
.info-box { background: var(--info-bg); border-color: var(--info); color: var(--info); }
.warn-box { background: var(--warning-bg); border-color: var(--warning); color: var(--warning); }
.success-box { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.design-box { background: #f5f3ff; border-color: #7c3aed; color: #5b21b6; }

/* ── Layer Header ── */
.layer-header {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 24px; border-radius: var(--radius-lg); margin-bottom: 24px;
  border: 1px solid; box-shadow: var(--shadow-sm);
}
.layer-header .layer-badge {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; color: #fff; flex-shrink: 0;
}
.layer-header h1 { margin: 0; font-size: 24px; }
.layer-header p { margin: 4px 0 0; font-size: 14px; }

/* ── Dependency Graph ── */
.dep-graph { margin: 20px 0; text-align: center; overflow-x: auto; }

/* ── Timeline ── */
.timeline { position: relative; padding-left: 32px; margin: 24px 0; }
.timeline::before { content: ''; position: absolute; left: 11px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-item::before { content: ''; position: absolute; left: -27px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); border: 2px solid var(--bg); box-shadow: var(--shadow-sm); }
.timeline-item h4 { margin: 0 0 4px; font-size: 15px; }
.timeline-item p { margin: 0; font-size: 13px; color: var(--text-muted); }

/* ── Phase Badge ── */
.phase-badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; letter-spacing: 0.03em; }
.phase-1 { background:#dbeafe; color:#1e40af; }
.phase-2 { background:#ede9fe; color:#6d28d9; }
.phase-3 { background:#fce7f3; color:#be185d; }
.phase-4 { background:#dcfce7; color:#15803d; }

/* ── SVG Diagrams ── */
.svg-diagram { margin: 20px 0; border: 1px solid var(--border); border-radius: var(--radius-lg); background:#fff; overflow-x:auto; box-shadow: var(--shadow-sm); }
.svg-diagram svg { display: block; width: 100%; min-width: 800px; height: auto; }

/* ── Tag / Pill ── */
.tag { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 10px; font-weight: 600; margin-right: 4px; }
.tag-blue { background:#dbeafe; color:#1e40af; }
.tag-purple { background:#ede9fe; color:#6d28d9; }
.tag-pink { background:#fce7f3; color:#9d174d; }
.tag-orange { background:#fff7ed; color:#9a3412; }
.tag-green { background:#dcfce7; color:#15803d; }
.tag-cyan { background:#ecfeff; color:#0e7490; }
.tag-indigo { background:#eef2ff; color:#3730a3; }
.tag-gray { background:#f1f5f9; color:#475569; }

/* ── Spec Table ── */
.spec-table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 12px 0 20px; }
.spec-table th { background: #1e293b; color: #e2e8f0; padding: 8px 12px; text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; }
.spec-table td { padding: 8px 12px; border-bottom: 1px solid var(--border-light); }
.spec-table tr:nth-child(even) td { background: var(--bg-secondary); }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border); padding: 16px 40px;
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px; color: var(--text-muted); background: var(--bg);
}

/* ── Responsive ── */
@media (max-width: 960px) {
  .sidebar { display: none; }
  .main { padding: 20px 16px; }
  .topbar nav a { padding: 6px 8px; font-size: 11px; }
}

/* ── Print ── */
@media print {
  .topbar, .sidebar, .site-footer, .breadcrumb { display: none; }
  .main { max-width: 100%; padding: 0; }
}