/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
}

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

/* 导航栏样式 */
.navbar {
  background-color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 20px;
}

.logo h1 {
  color: #e74c3c;
  font-size: 1.8rem;
}

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

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

.nav-links a:hover,
.nav-links a.active {
  color: #e74c3c;
}

.contact-btn {
  background-color: #e74c3c;
  color: white !important;
  padding: 0.5rem 1rem;
  border-radius: 5px;
}

/* 主要横幅样式 */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  color: white;
  padding-top: 80px;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.cta-button {
  display: inline-block;
  background-color: #e74c3c;
  color: white;
  padding: 1rem 2rem;
  border-radius: 5px;
  text-decoration: none;
  transition: background-color 0.3s;
}

.cta-button:hover {
  background-color: #c0392b;
}

/* 特色课程样式 */
.featured-courses {
  padding: 5rem 0;
  background-color: #f9f9f9;
}

.featured-courses h2,
.why-us h2 {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.5rem;
  color: #333;
}

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

.course-card {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

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

.course-card i {
  font-size: 2.5rem;
  color: #e74c3c;
  margin-bottom: 1rem;
}

.course-card h3 {
  margin-bottom: 1rem;
  color: #333;
}

/* 为什么选择我们样式 */
.why-us {
  padding: 5rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature {
  text-align: center;
  padding: 2rem;
}

.feature i {
  font-size: 2.5rem;
  color: #e74c3c;
  margin-bottom: 1rem;
}

/* 页脚样式 */
footer {
  background-color: #333;
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  color: white;
  font-size: 1.5rem;
  transition: color 0.3s;
}

.social-links a:hover {
  color: #e74c3c;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

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

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