:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #101828;
  --muted: #667085;
  --line: #e4e7ec;
  --primary: #6941c6;
  --primary-soft: #f4f3ff;
  --shadow: 0 12px 36px rgba(16, 24, 40, 0.06);
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
.site-shell { min-height: 100vh; }
.topbar {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(245,247,251,0.84);
  border-bottom: 1px solid rgba(228,231,236,0.9);
}
.topbar-inner {
  max-width: var(--max); margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { font-weight: 800; letter-spacing: -0.02em; }
.brand small { color: var(--muted); font-weight: 600; margin-left: 8px; }
.nav { display: flex; gap: 10px; flex-wrap: wrap; }
.nav a {
  padding: 10px 14px; border-radius: 999px; color: #344054; font-size: 14px;
}
.nav a:hover, .nav a.active { background: var(--primary-soft); color: var(--primary); }
.container { max-width: var(--max); margin: 0 auto; padding: 28px 20px 64px; }
.hero {
  display: grid; gap: 20px; padding: 28px; border: 1px solid var(--line); border-radius: 28px;
  background: linear-gradient(180deg, #ffffff 0%, #f9faff 100%); box-shadow: var(--shadow);
}
.hero h1 { margin: 0; font-size: clamp(32px, 5vw, 52px); line-height: 1.08; }
.hero p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; max-width: 860px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 12px; padding: 12px 16px; border: 1px solid var(--line);
  background: #fff; color: #344054; font-weight: 700;
}
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.grid { display: grid; gap: 18px; }
.grid.cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  border: 1px solid var(--line); border-radius: 22px; background: var(--card);
  box-shadow: var(--shadow); padding: 22px;
}
.card h3 { margin: 0 0 10px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); line-height: 1.8; }
.card .meta { margin-top: 14px; color: #98a2b3; font-size: 13px; }
.section-title { margin: 34px 0 14px; font-size: 24px; }
.page-header {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap;
  margin-bottom: 22px;
}
.page-header h1 { margin: 0; font-size: clamp(28px, 4vw, 40px); }
.page-header p { margin: 8px 0 0; color: var(--muted); line-height: 1.8; }
.article {
  border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: var(--shadow);
  padding: 28px;
}
.article h1,.article h2,.article h3 { color: #101828; }
.article h1 { font-size: 34px; margin-top: 0; }
.article h2 { font-size: 24px; margin-top: 28px; }
.article h3 { font-size: 18px; margin-top: 18px; }
.article p,.article li { color: #475467; line-height: 1.9; }
.article ul { padding-left: 22px; }
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 6px 10px; border-radius: 999px; background: var(--primary-soft);
  color: var(--primary); font-size: 12px; font-weight: 800;
}
.list { display: grid; gap: 16px; }
.list-item {
  display: block; border: 1px solid var(--line); border-radius: 20px; background: #fff;
  box-shadow: var(--shadow); padding: 22px;
}
.list-item h2 { margin: 10px 0 8px; font-size: 22px; }
.list-item p { margin: 0; color: var(--muted); line-height: 1.8; }
.list-item .row { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: center; }
.footer { max-width: var(--max); margin: 0 auto; padding: 0 20px 40px; color: #98a2b3; font-size: 13px; }
@media (max-width: 1024px) { .grid.cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 768px) {
  .topbar-inner { padding: 12px 16px; }
  .container { padding: 20px 16px 48px; }
  .hero, .article, .card, .list-item { padding: 20px; border-radius: 18px; }
  .grid.cards { grid-template-columns: 1fr; }
  .nav { gap: 6px; }
  .nav a { padding: 8px 12px; font-size: 13px; }
}