body {
  margin: 0;
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans', Arial, sans-serif;
  background: linear-gradient(135deg, #8ED7F8 0%, #C9B7F2 100%);
  color: #2E3440;
  min-height: 100vh;
}

.navbar {
  background: #1E1F26;
  color: #EDEEF2;
  box-shadow: 0 2px 8px #8ED7F822;
}
.navbar nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
}
.logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: #8ED7F8;
  text-decoration: none;
}
.navbar ul {
  display: flex;
  gap: 1.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.navbar ul li a {
  color: #8ED7F8;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  padding: 0.2rem 0.7rem;
  border-radius: 8px;
}
.navbar ul li a.active,
.navbar ul li a:hover {
  color: #64B1D9;
  background: #F9FAFB;
}

.banner {
  text-align: center;
  padding: 3.5rem 1rem 2.5rem 1rem;
  background: linear-gradient(135deg, #8ED7F8 0%, #C9B7F2 100%);
  color: #2E3440;
}
.banner h1 {
  font-size: 2.3rem;
  margin-bottom: 0.5rem;
  font-weight: 800;
  letter-spacing: 2px;
}
.banner p {
  font-size: 1.1rem;
  color: #59606F;
  margin-bottom: 1.5rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin: 0 auto 2.5rem auto;
  padding: 0;
}
.card {
  background: #F9FAFB;
  border-radius: 18px;
  box-shadow: 0 4px 24px #8ED7F822;
  padding: 2rem 1.3rem 1.3rem 1.3rem;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  border-top: 5px solid #8ED7F8;
  transition: transform 0.15s, box-shadow 0.15s;
}
.card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 8px 32px #C9B7F244;
}
.card h2, .card h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: #6f42c1;
}

.footer {
  text-align: center;
  margin: 2.5rem 0 1.5rem 0;
  color: #59606F;
  font-size: 1rem;
}
.footer nav a {
  color: #64B1D9;
  text-decoration: none;
  margin: 0 0.3rem;
}
.footer nav a:hover {
  color: #8ED7F8;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2em;
  justify-content: center;
  margin-top: 1em;
  font-size: 1rem;
}
.footer-nav a {
  color: #2E3440;
  text-decoration: none;
  transition: color 0.2s;
  padding: 0.2em 0.6em;
  border-radius: 4px;
}
.footer-nav a:hover {
  color: #fff;
  background: linear-gradient(135deg, #8ED7F8 0%, #C9B7F2 100%);
}
@media (prefers-color-scheme: dark) {
  .footer-nav a {
    color: #EDEEF2;
  }
  .footer-nav a:hover {
    color: #1E1F26;
  }
}

.longform-content {
  max-width: 900px;
  margin: 0 auto 2.5rem auto;
  padding: 0 1.5rem;
  background: #F9FAFB;
  border-radius: 16px;
  box-shadow: 0 2px 8px #8ED7F822;
  padding-bottom: 2rem;
}
.faq h4 {
  color: #64B1D9;
  margin-top: 1.5rem;
}

@media (max-width: 600px) {
  .banner h1 { font-size: 1.5rem; }
  .card-grid { gap: 1rem; }
  .card { padding: 1.2rem 0.7rem; }
  .container { padding: 0 0.5rem; }
}