*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #0f172a;
  line-height: 1.65;
  background: #f8fafc;
}
a { color: inherit; text-decoration: none; }

.site-nav {
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo { font-weight: 800; font-size: 1.15rem; letter-spacing: -0.03em; display: flex; }
.logo-saas { color: #4f46e5; }
.logo-check { color: #0f172a; }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: #64748b; font-size: 0.85rem; font-weight: 500; transition: color 0.15s; }
.nav-links a:hover { color: #0f172a; }

.breadcrumb {
  max-width: 860px;
  margin: 1rem auto 0;
  padding: 0 2rem;
  color: #64748b;
  font-size: 0.9rem;
}
.breadcrumb a { color: #4f46e5; }
.breadcrumb .bc-sep { margin: 0 0.5rem; }

.content {
  max-width: 860px;
  margin: 2rem auto 4rem;
  padding: 0 2rem;
}

.page-header { margin-bottom: 1.5rem; }
.page-header h1 { font-size: 2rem; line-height: 1.1; margin-bottom: 0.75rem; }
.byline { color: #475569; font-size: 0.95rem; }

.topline { display: inline-flex; align-items: center; gap: 0.65rem; margin-bottom: 1.25rem; color: #16a34a; font-weight: 700; }
.topline::before { content: ""; width: 8px; height: 8px; background: #a7f3d0; border-radius: 50%; display: inline-block; }

.article-body { display: grid; gap: 1.75rem; }
.article-summary { background: #fff; border: 1px solid #e2e8f0; border-radius: 16px; padding: 1.5rem; }
.article-summary h2 { margin-bottom: 0.75rem; font-size: 1.1rem; }

.section { background: #fff; border: 1px solid #e2e8f0; border-radius: 16px; padding: 1.5rem; }
.section h2 { margin-bottom: 0.85rem; font-size: 1.05rem; }

.tool-list { display: grid; gap: 1rem; }
.tool-card { border: 1px solid #e2e8f0; border-radius: 14px; padding: 1rem; background: #fff; }
.tool-card h3 { margin-bottom: 0.5rem; font-size: 1rem; }
.tool-card p { color: #475569; font-size: 0.95rem; }

.our-pick { display: flex; align-items: center; gap: 0.75rem; margin: 1rem 0; padding: 1rem; border-radius: 14px; background: #eff6ff; }
.our-pick strong { color: #1d4ed8; }

.features { display: grid; gap: 1rem; margin-top: 1rem; }
.features li { margin-left: 1.2rem; list-style: disc; color: #334155; }

.evaluation { display: grid; gap: 0.75rem; }
.eval-block dl { display: grid; gap: 0.3rem; }
.eval-block dt { font-size: 0.85rem; font-weight: 700; color: #0f172a; }
.eval-block dd { margin-left: 0; color: #475569; }

.faq { border-top: 1px solid #e2e8f0; padding-top: 1rem; margin-top: 1rem; }
.faq summary { cursor: pointer; padding: 0.8rem 1rem; background: #f8fafc; border-radius: 12px; font-weight: 700; }
.faq-toggle { font-size: 1.2rem; font-weight: 300; color: #94a3b8; flex-shrink: 0; line-height: 1; transition: transform 0.15s; }

details[open] .faq-toggle { transform: rotate(45deg); }

details.faq p { padding: 0 0 0.85rem; color: #475569; font-size: 0.88rem; line-height: 1.65; }

.page-footer { margin-top: 3.5rem; padding-top: 1.25rem; border-top: 1px solid #e2e8f0; font-size: 0.75rem; color: #94a3b8; line-height: 1.7; }
.page-footer a { color: #4f46e5; }
.page-footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  h1 { font-size: 1.4rem; }
  .our-pick { flex-direction: column; gap: 0.5rem; }
  .nav-links { gap: 1rem; }
  .card-footer { flex-direction: column; align-items: flex-start; }
}