:root {
  --seo-bg: #f4f8ff;
  --seo-panel: rgba(255, 255, 255, 0.93);
  --seo-text: #1f2c43;
  --seo-muted: #66758b;
  --seo-brand: #00b96b;
  --seo-brand-dark: #087d50;
  --seo-line: rgba(31, 44, 67, 0.08);
  --seo-shadow: 0 20px 56px rgba(16, 34, 66, 0.08);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--seo-text);
}
a {
  color: inherit;
  text-decoration: none;
}
p,
li,
dd {
  line-height: 1.75;
}
#root {
  min-height: 100vh;
}
.seo-entry {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.seo-entry__content {
  width: min(760px, calc(100vw - 32px));
  text-align: center;
}
.seo-entry__content h1 {
  margin: 0 0 16px;
  font-size: 30px;
  color: var(--seo-brand);
}
.seo-entry__summary {
  margin: 0 auto 12px;
  color: var(--seo-muted);
  font-size: 15px;
}
.seo-entry__links,
.top-nav,
.footer-links,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.seo-entry__links {
  justify-content: center;
  margin: 0 0 10px;
}
.seo-entry__links a,
.top-nav a,
.footer-links a {
  padding: 8px 13px;
  border-radius: 999px;
  border: 1px solid rgba(22, 119, 255, 0.18);
  background: rgba(22, 119, 255, 0.06);
  color: var(--seo-brand);
  font-size: 13px;
}
.seo-entry__note {
  margin: 0;
  color: #8d9ab0;
  font-size: 12px;
}
.seo-entry__links,
.seo-entry__note {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.page-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 72px;
}
.site-header,
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-header {
  margin-bottom: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
}
.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--seo-brand) 0%, #61a9ff 100%);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 12px 28px rgba(22, 119, 255, 0.22);
}
.brand small {
  display: block;
  margin-top: 4px;
  color: var(--seo-muted);
  font-weight: 500;
}
.top-nav a.current {
  color: var(--seo-brand-dark);
  background: rgba(234, 243, 255, 0.95);
}
.hero,
.grid,
.steps,
.kpis {
  display: grid;
  gap: 16px;
}
.hero {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}
.grid,
.steps,
.kpis {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.hero-card,
.hero-aside,
.panel,
.card,
.step,
.faq-item {
  background: var(--seo-panel);
  border: 1px solid var(--seo-line);
  box-shadow: var(--seo-shadow);
}
.hero-card,
.hero-aside,
.panel {
  border-radius: 30px;
  padding: clamp(24px, 4vw, 40px);
}
.card,
.step,
.faq-item {
  border-radius: 24px;
  padding: 22px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  background: rgba(22, 119, 255, 0.1);
  color: var(--seo-brand-dark);
  padding: 8px 14px;
  font-weight: 600;
  font-size: 14px;
}
.hero h1 {
  margin: 16px 0 14px;
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.12;
}
.lead,
.hero-aside p,
.section-intro,
.card p,
.step p,
.faq-item dd,
.panel p {
  margin: 0;
  color: var(--seo-muted);
}
.lead {
  font-size: 18px;
}
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
}
.btn-primary {
  background: linear-gradient(135deg, var(--seo-brand) 0%, #61a9ff 100%);
  color: #fff;
}
.btn-secondary {
  background: #fff;
  color: var(--seo-brand-dark);
  border: 1px solid rgba(22, 119, 255, 0.18);
}
.kpi {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(31, 44, 67, 0.06);
}
.kpi strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
}
.kpi span {
  color: var(--seo-muted);
  font-size: 14px;
}
.section {
  margin-top: 24px;
}
.section h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 4vw, 34px);
}
.card h3,
.step h3,
.faq-item dt {
  margin: 0 0 10px;
  font-size: 20px;
}
.faq {
  display: grid;
  gap: 14px;
}
.faq-item dd {
  margin: 10px 0 0;
}
.footer {
  margin-top: 28px;
  color: var(--seo-muted);
}
@media (max-width: 900px) {
  .hero,
  .grid,
  .steps,
  .kpis {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .page-shell {
    padding: 18px 14px 48px;
  }
  .hero-card,
  .hero-aside,
  .panel,
  .card,
  .step,
  .faq-item {
    border-radius: 22px;
    padding: 18px;
  }
  .lead {
    font-size: 16px;
  }
  .actions,
  .top-nav,
  .footer-links {
    width: 100%;
  }
  .btn-primary,
  .btn-secondary,
  .top-nav a,
  .footer-links a {
    flex: 1 1 100%;
  }
}