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

body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

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

/* 头部样式 */
.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.logo p {
  font-size: 0.9rem;
  opacity: 0.9;
}

.nav a {
  color: white;
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: opacity 0.3s ease;
}

.nav a:hover {
  opacity: 0.8;
}

/* 主要内容区域 */
main {
  margin-top: 80px;
}

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.hero-content h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 3rem;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
}

.stat .number {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffd700;
}

.stat .label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* 通用区块样式 */
section {
  padding: 4rem 0;
}

section h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  color: #2c3e50;
}

/* 关于我们 */
.about {
  background: white;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: #555;
}

.about-features {
  display: grid;
  gap: 2rem;
}

.feature {
  text-align: center;
  padding: 2rem;
  background: #f8f9fa;
  border-radius: 10px;
  transition: transform 0.3s ease;
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

/* 使命愿景 */
.mission {
  background: #f8f9fa;
}

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

.mission-item {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.mission-item h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #667eea;
}

.mission-item ul {
  list-style: none;
  margin-top: 1rem;
}

.mission-item li {
  margin-bottom: 0.5rem;
  padding-left: 1rem;
  position: relative;
}

.mission-item li:before {
  content: "•";
  color: #667eea;
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* 团队介绍 */
.team {
  background: white;
}

.team-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3rem;
}

.team-intro p {
  font-size: 1.2rem;
  color: #555;
}

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

.member {
  text-align: center;
  padding: 2rem;
  background: #f8f9fa;
  border-radius: 10px;
  transition: transform 0.3s ease;
}

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

.member-avatar {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.member h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

/* 服务介绍 */
.services {
  background: #f8f9fa;
}

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

.service-card {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

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

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

/* 联系我们 */
.contact {
  background: white;
}

.contact-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  display: grid;
  gap: 2rem;
}

.contact-item {
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 10px;
}

.contact-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #667eea;
}

.contact-message {
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 10px;
}

.contact-message p {
  font-size: 1.1rem;
  line-height: 1.8;
}

/* 页脚 */
.footer {
  background: #2c3e50;
  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;
  color: #667eea;
}

.footer-section a {
  color: white;
  text-decoration: none;
  display: block;
  margin-bottom: 0.5rem;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.footer-section a:hover {
  opacity: 1;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #34495e;
  opacity: 0.7;
}

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

  .nav a {
    margin: 0 1rem;
  }

  .hero-content h2 {
    font-size: 2rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .team-members {
    grid-template-columns: 1fr;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  section h2 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-content h2 {
    font-size: 1.5rem;
  }

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

  .nav a {
    margin: 0 0.5rem;
    font-size: 0.9rem;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.feature,
.member,
.service-card,
.mission-item {
  animation: fadeInUp 0.6s ease-out;
}

/* 滚动平滑 */
html {
  scroll-behavior: smooth;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-decoration: none;
  border-radius: 25px;
  font-weight: 500;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}