/* 首页样式。 */
:root {
  --brand: #2563eb;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); }
.hero {
  background: radial-gradient(900px 400px at 20% 0%, #dbeafe, transparent 60%),
    radial-gradient(700px 400px at 90% 10%, #ede9fe, transparent 55%),
    #fff;
  border-bottom: 1px solid var(--line);
}
.hero-inner { max-width: 980px; margin: 0 auto; padding: 64px 24px 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.hero h1 { font-size: 44px; line-height: 1.2; letter-spacing: -0.02em; margin: 28px 0 14px; }
.lede { font-size: 17px; color: var(--muted); max-width: 620px; margin: 0; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
}
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.notice {
  margin-top: 22px;
  padding: 10px 14px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.18);
  color: #1e40af;
  border-radius: 10px;
  font-size: 14px;
  max-width: 620px;
}
.features {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 24px 64px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.features section {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
}
.features h2 { font-size: 17px; margin: 0 0 8px; }
.features p { margin: 0; color: var(--muted); font-size: 14px; }
code {
  background: #eef2ff;
  color: #1e3a8a;
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 13px;
}
.site-foot { text-align: center; color: var(--muted); font-size: 13px; padding: 24px; border-top: 1px solid var(--line); }
@media (max-width: 760px) {
  .hero h1 { font-size: 30px; }
  .features { grid-template-columns: 1fr; }
}