* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: #1f2329;
  background: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 60px;
  padding: 0 32px;
  border-bottom: 1px solid #e5e6eb;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
}
.brand {
  font-size: 17px;
  font-weight: 800;
  white-space: nowrap;
}
.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: #4e5969;
  font-size: 14px;
}
.nav a:hover,
.nav a.active { color: #ff4500; }
.hero {
  border-bottom: 1px solid #eef0f3;
  background: linear-gradient(180deg, #f7f8fa 0%, #ffffff 100%);
}
.hero-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 58px 28px 48px;
}
.eyebrow {
  margin: 0 0 12px;
  color: #ff4500;
  font-size: 14px;
  font-weight: 700;
}
h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.28;
  letter-spacing: 0;
}
.lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: #4e5969;
  font-size: 17px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid #d8dce3;
  border-radius: 6px;
  color: #1f2329;
  background: #fff;
  font-weight: 700;
}
.button.primary {
  border-color: #ff4500;
  color: #fff;
  background: #ff4500;
}
.main {
  max-width: 980px;
  margin: 0 auto;
  padding: 34px 28px 56px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.card {
  border: 1px solid #e5e6eb;
  border-radius: 8px;
  padding: 20px;
  background: #fff;
}
.card h3,
.section h2 {
  margin: 0 0 10px;
  color: #1f2329;
}
.card p,
.section p,
.section li {
  color: #4e5969;
}
.section {
  padding: 26px 0;
  border-bottom: 1px solid #eef0f3;
}
.section:last-child { border-bottom: 0; }
.section h2 {
  font-size: 24px;
}
.section h3 {
  margin: 20px 0 8px;
  font-size: 18px;
}
.section ul {
  margin: 10px 0 0;
  padding-left: 22px;
}
.notice {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid #ffd8c7;
  border-radius: 8px;
  color: #663018;
  background: #fff5f0;
}
.meta {
  margin-top: 8px;
  color: #8f959e;
  font-size: 13px;
}
.footer {
  border-top: 1px solid #e5e6eb;
  color: #6b7280;
  background: #f7f8fa;
}
.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 28px;
  font-size: 13px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 8px;
}
.footer a { color: #4e5969; }
@media (max-width: 760px) {
  .topbar {
    height: auto;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 20px;
  }
  .nav { flex-wrap: wrap; gap: 10px 14px; }
  h1 { font-size: 28px; }
  .grid { grid-template-columns: 1fr; }
  .hero-inner,
  .main,
  .footer-inner { padding-left: 20px; padding-right: 20px; }
}