:root {
  color-scheme: light;
  --ink: #14233c;
  --muted: #5d6b82;
  --line: rgba(30, 63, 112, 0.14);
  --brand: #185bd7;
  --brand-deep: #0e367f;
  --paper: rgba(255, 255, 255, 0.9);
  --wash: #f2f6fc;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(52, 119, 235, 0.17), transparent 35rem),
    radial-gradient(circle at 100% 28%, rgba(69, 196, 190, 0.12), transparent 32rem),
    var(--wash);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.72;
}

a {
  color: var(--brand-deep);
  text-underline-offset: 0.2em;
}

.seo-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.seo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

.seo-brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 8px 26px rgba(27, 65, 127, 0.12);
}

.seo-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px 18px;
  font-size: 14px;
}

.seo-nav a {
  text-decoration: none;
}

.seo-hero,
.seo-panel,
.seo-card,
.seo-disclosure {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 24px 70px rgba(32, 69, 124, 0.08);
  backdrop-filter: blur(16px);
}

.seo-hero {
  padding: clamp(32px, 6vw, 72px);
  border-radius: 32px;
}

.seo-eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.24;
  text-wrap: balance;
}

h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(36px, 7vw, 72px);
  letter-spacing: -0.045em;
}

.seo-lead {
  max-width: 820px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2.3vw, 21px);
}

.seo-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.seo-chip {
  padding: 7px 11px;
  border: 1px solid rgba(24, 91, 215, 0.14);
  border-radius: 999px;
  color: var(--brand-deep);
  background: rgba(232, 240, 255, 0.7);
  font-size: 13px;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.seo-card,
.seo-panel {
  border-radius: 24px;
  padding: clamp(24px, 4vw, 38px);
}

.seo-card h2,
.seo-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 4vw, 34px);
}

.seo-card p,
.seo-panel p,
.seo-panel li {
  color: var(--muted);
}

.seo-card-link {
  display: inline-flex;
  margin-top: 12px;
  font-weight: 750;
}

.seo-section {
  margin: 24px 0;
}

.seo-outline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  list-style: none;
}

.seo-outline li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(246, 249, 255, 0.84);
}

.seo-faq details {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.seo-faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.seo-faq summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 750;
}

.seo-faq details p {
  margin: 10px 0 0;
}

.seo-disclosure {
  margin: 24px 0;
  padding: 22px 26px;
  border-radius: 20px;
  border-left: 4px solid var(--brand);
  color: var(--muted);
  font-size: 14px;
}

.seo-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 24px;
  padding: 30px 0 44px;
  color: var(--muted);
  font-size: 13px;
}

.seo-footer-records {
  display: flex;
  justify-content: center;
  flex-basis: 100%;
  flex-wrap: wrap;
  gap: 8px 20px;
}

@media (max-width: 720px) {
  .seo-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .seo-nav {
    justify-content: flex-start;
  }

  .seo-grid,
  .seo-outline {
    grid-template-columns: 1fr;
  }

  .seo-hero {
    border-radius: 24px;
  }

  .seo-footer-records {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}