:root {
  --ink: #0b1b2a;
  --ink-muted: #4a5b6c;
  --primary: #1a6dfc;
  --primary-deep: #0d47a1;
  --accent: #ffb703;
  --surface: #ffffff;
  --surface-alt: #f2f6fb;
  --border: #d8e2f0;
  --shadow: 0 12px 30px rgba(13, 30, 60, 0.12);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: #f6f8fb;
  background-image:
    radial-gradient(circle at 12% 20%, rgba(26, 109, 252, 0.12), transparent 45%),
    radial-gradient(circle at 88% 0%, rgba(255, 183, 3, 0.12), transparent 35%);
}

h1,
h2,
h3 {
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  margin: 0 0 12px;
}

p {
  margin: 0 0 12px;
  line-height: 1.7;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-deep);
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--ink);
}

.brand-badge {
  background: var(--primary);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.1em;
}

.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.site-nav a {
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 999px;
  transition: background 0.3s ease, color 0.3s ease;
}

.site-nav a.active,
.site-nav a:hover {
  background: rgba(26, 109, 252, 0.12);
  color: var(--primary-deep);
}

.hero {
  padding: 120px 0 60px;
  background: linear-gradient(135deg, rgba(26, 109, 252, 0.12), rgba(255, 255, 255, 0.6));
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--primary-deep);
  font-size: 12px;
  font-weight: 700;
}

.hero h1 {
  font-size: 40px;
  margin: 16px 0;
}

.summary {
  font-size: 18px;
  color: var(--ink-muted);
  max-width: 720px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
  color: var(--ink-muted);
  font-size: 14px;
}

.meta span {
  background: #ffffff;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.section {
  padding: 60px 0;
}

.section p,
.section li {
  color: var(--ink-muted);
}

.section h2 {
  font-size: 28px;
}

.section h3 {
  font-size: 20px;
}

.brand-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.brand-oneliner {
  font-weight: 600;
  color: var(--ink);
  margin-top: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 10px 24px rgba(10, 20, 40, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px rgba(10, 20, 40, 0.12);
}

.card h3 {
  margin-bottom: 10px;
}

.checklist {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
}

.checklist li {
  list-style: none;
  padding: 12px 16px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.faq-list {
  display: grid;
  gap: 18px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 8px 20px rgba(10, 20, 40, 0.06);
}

.faq-item h3 {
  font-size: 18px;
}

.faq-item .label {
  font-weight: 700;
  color: var(--ink);
}

.faq-item ul {
  margin: 10px 0 0 18px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links a {
  background: rgba(26, 109, 252, 0.1);
  padding: 8px 14px;
  border-radius: 999px;
}

.note {
  background: var(--surface-alt);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 12px;
  color: var(--ink-muted);
}

.site-footer {
  background: #0b1b2a;
  color: #e4ecf7;
  padding: 40px 0;
}

.site-footer a {
  color: #e4ecf7;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  justify-content: space-between;
}

.footer-grid p {
  margin: 0;
}

.reveal {
  animation: fade-up 0.7s ease both;
}

.reveal.delay-1 {
  animation-delay: 0.1s;
}

.reveal.delay-2 {
  animation-delay: 0.2s;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .site-header .wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero {
    padding: 100px 0 40px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}