/* 基础样式重置 */
:root {
  --primary-color: #5b8ef4;
  /* 主色调 */
  --secondary-color: #ff9f40;
  /* 辅助色 */
  --text-color: #333;
  --light-bg: #f8f9fa;
}

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

body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-container {
  display: flex;
  align-items: center;
}

/* 导航栏样式 */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  /* padding: 1rem 0; */
  background-color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo >img {
  display: flex;
  align-self: center;
  width: 150px;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 2rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 英雄区域样式 */
.hero {
  padding: 4rem 0;
  text-align: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  color: #666;
}

.cta-button {
  display: inline-block;
  background-color: var(--secondary-color);
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: bold;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background-color: #ff8c2a;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(255, 159, 64, 0.3);
}

/* 功能区域样式 - 使用Grid布局实现响应式 */
.features {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* 页脚样式 */
.footer {
  background-color: #333;
  color: white;
  padding: 2rem 0;
  text-align: center;
}

/* 响应式设计 - 媒体查询 */
/* 平板设备 */
@media (max-width: 768px) {
  .nav-container {
    justify-content: space-between;
  }

  .logo>img {
    width: 90px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 1rem 0;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    margin: 0.5rem 0;
    text-align: center;
  }

  .nav-toggle {
    display: block;
  }

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

  .hero p {
    font-size: 1rem;
  }
}

/* 手机设备 */
@media (max-width: 480px) {
  .nav-container {
    justify-content: space-between;
  }

  .container {
    padding: 0 15px;
  }

  .hero {
    padding: 2rem 0;
  }

  .features {
    padding: 2rem 0;
  }

  .feature-card {
    padding: 1.5rem;
  }
}