body {
  margin: 0;
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;
  background: #f8f8f8;
  color: #222;
}
header {
  background: #fff;
  border-bottom: 2px solid #ff9800;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}
.logo-title {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0 10px 0;
}
.logo-circle {
  width: 48px;
  height: 48px;
  background: #ff9800;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: bold;
  box-shadow: 0 2px 8px rgba(255,152,0,0.15);
}
header h1 {
  font-size: 1.6rem;
  color: #ff9800;
  margin: 0;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}
nav a {
  text-decoration: none;
  color: #222;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border 0.2s, color 0.2s;
}
nav a.active, nav a:hover {
  color: #ff9800;
  border-bottom: 2px solid #ff9800;
}
.hero {
  background: linear-gradient(90deg, #ff9800 0%, #ffc107 100%);
  color: #fff;
  padding: 60px 0 40px 0;
  text-align: center;
}
.hero h2 {
  font-size: 2.2rem;
  margin-bottom: 18px;
}
.hero p {
  font-size: 1.1rem;
  margin-bottom: 28px;
}
.cta-btn {
  display: inline-block;
  background: #fff;
  color: #ff9800;
  font-weight: bold;
  padding: 12px 32px;
  border-radius: 24px;
  font-size: 1.1rem;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(255,152,0,0.10);
  transition: background 0.2s, color 0.2s;
}
.cta-btn:hover {
  background: #ff9800;
  color: #fff;
}
.section {
  padding: 48px 0 32px 0;
  background: #fff;
}
.section.alt {
  background: #f3f3f3;
}
.section h2 {
  color: #ff9800;
  font-size: 1.6rem;
  margin-bottom: 24px;
  text-align: center;
}
.features-grid, .highlights-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}
.feature-card, .highlight-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  padding: 24px 18px;
  min-width: 220px;
  max-width: 260px;
  flex: 1 1 220px;
  text-align: center;
}
.feature-card h3, .highlight-card h3 {
  color: #ff9800;
  margin-bottom: 12px;
}
.arch-list {
  margin: 0 auto 18px auto;
  max-width: 600px;
  padding-left: 0;
  list-style: none;
}
.arch-list li {
  margin-bottom: 8px;
  font-size: 1.05rem;
}
.arch-layers {
  text-align: center;
  color: #888;
  font-size: 1.1rem;
  margin-top: 10px;
}
footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 18px 0;
  font-size: 1rem;
  margin-top: 32px;
}
@media (max-width: 900px) {
  .features-grid, .highlights-grid {
    flex-direction: column;
    align-items: center;
  }
  .container {
    padding: 0 8px;
  }
}
@media (max-width: 600px) {
  header h1 {
    font-size: 1.1rem;
  }
  .logo-circle {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }
  .feature-card, .highlight-card {
    min-width: 90vw;
    max-width: 98vw;
    padding: 18px 6px;
  }
  .section {
    padding: 28px 0 18px 0;
  }
  .hero {
    padding: 36px 0 18px 0;
  }
}