* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, "Microsoft YaHei", sans-serif;
  background: #f3f4f6;
  color: #111827;
  line-height: 1.75;
}

a {
  color: #0891b2;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  color: #0f172a;
}

.nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav a {
  color: #334155;
  font-weight: 500;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.hero {
  max-width: 1120px;
  margin: 0 auto 24px;
  padding: 40px 36px;
  border-radius: 28px;
  background: #0f172a;
  color: #fff;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: 1.75rem;
  line-height: 1.4;
  font-weight: 700;
}

.hero-desc {
  margin: 0 0 28px;
  color: #cbd5e1;
  font-size: 1rem;
  max-width: 720px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  background: #0891b2;
  color: #fff;
  font-weight: 600;
  border: none;
  text-decoration: none;
}

.btn:hover {
  background: #0e7490;
  text-decoration: none;
  color: #fff;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.quick-item {
  background: #fff;
  border-radius: 16px;
  padding: 18px 16px;
  text-align: center;
  border: 1px solid #e5e7eb;
}

.quick-item a {
  color: #0f172a;
  font-weight: 600;
  text-decoration: none;
}

.quick-item span {
  display: block;
  margin-top: 6px;
  font-size: 0.875rem;
  color: #64748b;
  font-weight: 400;
}

.card {
  background: #fff;
  border-radius: 20px;
  padding: 28px 32px;
  margin-bottom: 20px;
  max-width: 1120px;
}

.card h2 {
  margin: 0 0 16px;
  font-size: 1.35rem;
  color: #0f172a;
}

.card p {
  margin: 0 0 14px;
  color: #374151;
}

.card p:last-child {
  margin-bottom: 0;
}

.news-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-list li {
  padding: 12px 0;
  border-bottom: 1px solid #f1f5f9;
}

.news-list li:last-child {
  border-bottom: none;
}

.news-date,
.news-list time {
  display: block;
  font-size: 0.85rem;
  color: #64748b;
  margin-bottom: 4px;
}

.news-list h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
  color: #0f172a;
}

.news-list p {
  margin: 0;
}

.faq-item {
  border-bottom: 1px solid #e5e7eb;
  padding: 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item details {
  padding: 14px 0;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: #0f172a;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::before {
  content: "+ ";
  color: #0891b2;
  font-weight: 700;
}

.faq-item details[open] summary::before {
  content: "− ";
}

.faq-item details p {
  margin: 10px 0 0;
  color: #4b5563;
}

.site-footer {
  background: #0f172a;
  color: #e5e7eb;
  padding: 28px 20px;
  text-align: center;
}

.site-footer p {
  margin: 0 0 10px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .hero {
    padding: 28px 20px;
    border-radius: 20px;
  }

  .hero h1 {
    font-size: 1.35rem;
  }

  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card {
    padding: 20px 18px;
    border-radius: 16px;
  }
}