:root {
  --bg: #f4f6f8;
  --surface: #fff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --blue: #3b82f6;
  --blue-soft: #eff6ff;
  --green: #10b981;
  --ink: #0f172a;
  --shadow: 0 10px 40px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  color-scheme: light;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; }
img { max-width: 100%; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 28px;
  background: rgba(244, 246, 248, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
}
.brand img { width: 32px; height: 32px; border-radius: 9px; }
.nav-links { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.nav-text {
  text-decoration: none;
  color: var(--muted);
  font: 500 14px/1 inherit;
  padding: 8px 6px;
}
.nav-text:hover { color: var(--text); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  font: 500 14px/1 inherit;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-ghost { background: #fff; border: 1px solid var(--line); color: var(--text); }
.btn:hover { filter: brightness(0.97); }

.pill {
  display: inline-flex;
  align-items: center;
  margin: 0 0 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #ecfdf5;
  color: #047857;
  font-size: 12px;
  font-weight: 600;
}

.hero {
  max-width: 980px;
  margin: 0 auto;
  padding: 72px 24px 40px;
  text-align: center;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, #2563eb, #10b981);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  margin: 0 auto 28px;
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--muted); }

.section { max-width: 1040px; margin: 0 auto; padding: 36px 24px 8px; }
.section h2 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.02em;
}
.lead { color: var(--muted); margin: 0 0 22px; line-height: 1.6; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

.faq { display: grid; gap: 10px; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }

.install-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, #eff6ff, #ecfdf5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.install-banner strong { display: block; font-size: 18px; margin-bottom: 4px; }
.install-banner p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.install-banner code, .steps code, .callout code, .lead code {
  font: 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 6px;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  counter-reset: step;
}
.steps li {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 16px 16px 54px;
  box-shadow: var(--shadow);
  counter-increment: step;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font: 700 12px/1 inherit;
}
.steps strong { display: block; margin-bottom: 4px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.steps a { color: #2563eb; }

.callout {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  font-size: 14px;
  line-height: 1.55;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.setup-grid ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}
.setup-grid a { color: #2563eb; }

.timeline { display: grid; gap: 12px; }
.timeline-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.timeline-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.timeline-meta .ver {
  font-weight: 700;
  color: #1d4ed8;
}
.timeline-meta time { color: var(--muted); font-size: 13px; }
.timeline-item ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.footer {
  margin-top: 56px;
  padding: 28px 24px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.footer a { color: #2563eb; text-decoration: none; }
.footer a:hover { text-decoration: underline; }

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.auth-card h1 { margin: 8px 0 6px; font-size: 24px; }
.auth-card .sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 6px; }
input[type="email"], input[type="password"], input[type="text"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: 14px inherit;
  background: #fff;
}
textarea { min-height: 88px; resize: vertical; }
.field-hint { font-size: 12px; color: var(--muted); margin-top: 6px; }
.status { min-height: 20px; margin-top: 12px; font-size: 13px; color: #b45309; }
.switch { margin-top: 16px; font-size: 13px; color: var(--muted); }
.switch a { color: #2563eb; }

.app-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.side {
  background: #fff;
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.side nav { display: grid; gap: 4px; }
.side button, .side a.nav-item {
  appearance: none;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 10px 12px;
  border-radius: 10px;
  font: 600 13px inherit;
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
}
.side button.active, .side a.nav-item.active, .side button:hover {
  background: var(--blue-soft);
  color: #1d4ed8;
}
.main { padding: 28px 32px 48px; max-width: 960px; }
.main h1 { margin: 0 0 8px; font-size: 26px; }
.kpi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 18px 0;
}
.kpi .card .v { font-size: 26px; font-weight: 700; margin-top: 6px; }
.tool-list { display: grid; gap: 8px; margin-top: 10px; }
.tool-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 12px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.tool-item.write { border-color: #fde68a; background: #fffbeb; }
.tool-item.danger { border-color: #fecaca; background: #fef2f2; }
.tool-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: #2563eb;
}
.tool-item strong { display: block; font-size: 14px; }
.tool-item small { display: block; color: var(--muted); font-size: 12px; line-height: 1.45; margin-top: 4px; }
.risk {
  display: inline-flex;
  margin-left: 6px;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}
.risk.query { background: #ecfdf5; color: #047857; }
.risk.write { background: #fffbeb; color: #b45309; }
.risk.danger { background: #fef2f2; color: #b91c1c; }
.audit-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.audit-table th, .audit-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.audit-table th { background: #f8fafc; color: var(--muted); font-weight: 600; }
.audit-table td.preview { max-width: 280px; word-break: break-word; color: var(--muted); }
.list { display: grid; gap: 8px; }
.row {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
}
.row strong { display: block; margin-bottom: 4px; }
.row small { color: var(--muted); }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 12px 0 16px; }
.hidden { display: none !important; }
.msg { padding: 10px 12px; border-radius: 10px; margin: 8px 0; white-space: pre-wrap; font-size: 14px; line-height: 1.55; }
.msg.user { background: #e8f3ff; }
.msg.assistant { background: #f3f4f6; }
.code {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 12px;
  padding: 14px;
  font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  overflow: auto;
}
@media (max-width: 800px) {
  .app-shell { grid-template-columns: 1fr; }
  .side { border-right: 0; border-bottom: 1px solid var(--line); }
  .main { padding: 20px 16px 40px; }
}