* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: #1f2937;
  background: #f8fafc;
  line-height: 1.7;
}

a {
  color: #4f6ef7;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: #111827;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.hero {
  background: linear-gradient(135deg, #4f6ef7 0%, #22c1c3 100%);
  color: #fff;
  padding: 72px 0;
}

.hero-inner {
  max-width: 720px;
}

.badge {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-size: 13px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.25;
}

.lead {
  margin: 0 0 28px;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.92);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
}

.btn-primary {
  background: #fff;
  color: #4f6ef7;
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}

.section {
  padding: 56px 0;
}

.section-muted {
  background: #fff;
}

.section-title {
  margin: 0 0 24px;
  font-size: 24px;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: #6b7280;
  font-size: 14px;
}

.steps {
  max-width: 720px;
  margin: 0 auto 20px;
  padding-left: 20px;
}

.note {
  max-width: 720px;
  margin: 0 auto;
  padding: 14px 16px;
  border-radius: 10px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 14px;
}

.contact-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
}

.contact-card p {
  margin: 0 0 10px;
}

.doc-page {
  padding: 40px 0 64px;
}

.doc-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 28px;
}

.doc-card h1 {
  margin-top: 0;
  font-size: 28px;
}

.doc-card h2 {
  margin-top: 28px;
  font-size: 20px;
}

.doc-card p,
.doc-card li {
  color: #374151;
}

.doc-meta {
  color: #6b7280;
  font-size: 14px;
}

.footer {
  background: #111827;
  color: #d1d5db;
  padding: 28px 0;
  font-size: 14px;
}

.footer-inner {
  text-align: center;
}

.footer p {
  margin: 0 0 8px;
}

.beian a {
  color: #d1d5db;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 0;
  }

  .nav {
    flex-wrap: wrap;
    gap: 12px;
  }
}