/* style.css - 全局统一样式 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #333;
  line-height: 1.6;
  background-color: #fff;
}

/* 导航栏 */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
  background: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #2563eb;
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s;
}

nav a:hover {
  color: #2563eb;
}

/* 当前页高亮（可选）*/
nav a.active {
  color: #2563eb;
  /* 不加下划线，符合第一张图风格 */
}

/* 主视觉区域 */
.hero {
  background-color: #e6f0ff;
  padding: 8rem 2rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: #1e293b;
}

.hero p {
  font-size: 1.1rem;
  color: #64748b;
  margin-bottom: 2rem;
}

.cta-button {
  background-color: #2563eb;
  color: white;
  border: none;
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.cta-button:hover {
  background-color: #1d4ed8;
}

/* 内容区块 */
.section {
  padding: 4rem 5%;
}

.section h2 {
  font-size: 1.5rem;
  font-weight: bold;
  color: #1e293b;
  margin-bottom: 1rem;
}

.section p {
  color: #64748b;
  max-width: 800px;
  margin: 0 auto;
}

/* 响应式适配 */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 5rem 1rem;
  }
}