* {
  margin: 0; 
  padding: 0; 
  box-sizing: border-box; 
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
}

body {
  min-height: 100vh; 
  position: relative; 
  overflow-x: hidden; 
  background-color: #f9f9f9; 
  padding: 0; 
  margin: 0; 
  cursor: default; 
}

/* 导航栏容器 */
.navbar {
  position: fixed; 
  top: 0; 
  left: 0; 
  right: 0; 
  background-color: rgba(44, 62, 80, 0.8); 
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15); 
  z-index: 1000; 
  height: 100px; 
  transition: all 0.3s ease; 
}

.nav-wrapper {
  max-width: 1500px; 
  margin: 0 auto; 
  padding: 0 30px; 
}

.nav-content {
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  height: 100px; 
}

.logo-con{
  display: flex; 
  align-items: center; 
  gap: 30px; 
}

.logo-container{
  position: relative; 
  display: flex; 
  align-items: center; 
  gap: 0; 
  transition: gap 0.5s ease; 
}

#logo1 {
  height: 50px; 
  margin: 0; 
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); 
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2)); 
}

#logo2 {
  width: 100px; 
  margin: 0; 
  opacity: 0; 
  transform: translateX(-20px); 
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); 
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2)); 
}

.logo {
  color: #ffffff; 
  font-size: 1.4rem; 
  font-weight: 600; 
  text-decoration: none; 
  letter-spacing: 0.5px; 
  text-shadow: 0 2px 4px rgba(0,0,0,0.2); 
  transition: all 0.3s ease; 
  position: relative; 
}

.logo::after {
  content: ''; 
  position: absolute; 
  bottom: -5px; 
  left: 0; 
  width: 0; 
  height: 2px; 
  background-color: #ffffff; 
  transition: width 0.3s ease; 
}

.logo:hover::after {
  width: 100%; 
}

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

.nav-item {
  position: relative; 
  margin-left: 1px; 
}

.nav-link {
  display: block; 
  color: #ecf0f1; 
  text-decoration: none; 
  padding: 0 20px; 
  height: 100px; 
  line-height: 100px; 
  font-size: 0.95rem; 
  transition: all 0.3s ease; 
  text-shadow: 0 1px 2px rgba(0,0,0,0.2); 
}

.nav-link:hover {
  background-color: rgba(52, 73, 94, 0.8); 
  color: #ffffff; 
  transform: translateY(-2px); 
}

.dropdown {
  position: absolute; 
  top: 100%; 
  left: 0; 
  min-width: 200px; 
  background-color: #ffffff; 
  border-radius: 0 0 8px 8px; 
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); 
  opacity: 0; 
  visibility: hidden; 
  transform: translateY(10px); 
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1); 
  z-index: 999; 
}

.nav-item:hover .dropdown {
  opacity: 1; 
  visibility: visible; 
  transform: translateY(0); 
}

.dropdown-item {
  list-style: none; 
  border-bottom: 1px solid #f5f5f5; 
}

.dropdown-item:last-child {
  border-bottom: none; 
}

.dropdown-link {
  display: block; 
  padding: 12px 20px; 
  color: #34495e; 
  text-decoration: none; 
  font-size: 0.9rem; 
  transition: all 0.2s ease; 
}

.dropdown-link:hover {
  background-color: #f8f9fa; 
  color: #2980b9; 
  padding-left: 22px; 
  transform: translateX(3px); 
}

.has-dropdown > .nav-link::after {
  content: "▼"; 
  font-size: 0.7rem; 
  margin-left: 8px; 
  vertical-align: middle; 
  display: inline-block; 
  transition: transform 0.3s ease; 
}

.has-dropdown:hover > .nav-link::after {
  transform: rotate(180deg); 
}

.scrolled {
  background-color: #2c3e50; 
  height: 90px; 
  box-shadow: 0 4px 15px rgba(0,0,0,0.2); 
}

.scrolled .nav-content {
  height: 90px; 
}

.scrolled .nav-link {
  height: 90px; 
  line-height: 90px; 
}

.scrolled #logo1 {
  transform: translateX(-30px); 
}

.scrolled #logo2 {
  opacity: 1; 
  transform: translateX(0); 
}

.scrolled .logo-container {
  gap: 15px; 
}

/* 主要内容区域 */
.main-container {
  padding: 80px 0 60px; 
  background-color: #f9f9f9; 
}

.content-wrapper {
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 30px; 
}

.section-title {
  text-align: center; 
  margin-bottom: 50px; 
  position: relative; 
}

.section-title h2 {
  display: inline-block; 
  font-size: 2.2rem; 
  color: #2c3e50; 
  position: relative; 
  padding-bottom: 15px; 
}

.section-title h2::after {
  content: ''; 
  position: absolute; 
  bottom: 0; 
  left: 50%; 
  transform: translateX(-50%); 
  width: 100px; 
  height: 3px; 
  background: linear-gradient(90deg, transparent, #3498db, transparent); 
}

/* 关于我们 */
.about-section {
  margin-bottom: 100px; 
}

.about-content {
  display: flex; 
  flex-wrap: wrap; 
  gap: 40px; 
  align-items: center; 
}

.about-text {
  flex: 1; 
  min-width: 300px; 
}

.about-text p {
  font-size: 1.1rem; 
  line-height: 1.8; 
  color: #34495e; 
  margin-bottom: 20px; 
  transition: text-shadow 0.3s ease; 
}

.about-text p:hover {
  text-shadow: 0 0 5px rgba(52, 152, 219, 0.7),
               0 0 10px rgba(52, 152, 219, 0.5),
               0 0 15px rgba(52, 152, 219, 0.3); 
}

.about-image {
  flex: 1; 
  min-width: 300px; 
  position: relative; 
}

.about-image img {
  width: 100%; 
  height: auto; 
  border-radius: 8px; 
  box-shadow: 0 10px 30px rgba(0,0,0,0.15); 
  transition: transform 0.5s ease; 
}

.about-image:hover img {
  transform: translateY(-10px); 
}

/* 团队成员 */
.members-section {
  margin-bottom: 100px; 
}

/* 成员导航 */
.members-nav {
  display: flex; 
  justify-content: center; 
  gap: 20px; 
  margin-bottom: 40px; 
}

.nav-btn {
  padding: 10px 25px; 
  background-color: #e0e0e0; 
  color: #34495e; 
  border: none; 
  border-radius: 25px; 
  font-size: 1rem; 
  font-weight: 500; 
  cursor: pointer; 
  transition: all 0.3s ease; 
  box-shadow: 0 2px 5px rgba(0,0,0,0.1); 
}

.nav-btn:hover {
  background-color: #d0d0d0; 
  transform: translateY(-2px); 
  box-shadow: 0 4px 8px rgba(0,0,0,0.15); 
}

.nav-btn.active {
  background-color: #3498db; 
  color: white; 
  box-shadow: 0 4px 10px rgba(52, 152, 219, 0.4); 
}

/* 成员组 */
.members-grid {
  display: grid; 
  grid-template-columns: minmax(250px, 1fr); 
  gap: 40px; 
  display: none; /* 默认隐藏所有成员组 */
  justify-content: center; 
}

.members-grid.active {
  display: grid; /* 激活状态下显示 */
}

.member-card {
  background-color: white; 
  border-radius: 8px; 
  overflow: hidden; 
  box-shadow: 0 5px 15px rgba(0,0,0,0.1); 
  transition: transform 0.5s ease, box-shadow 0.5s ease; 
}

/* 单个卡片样式 */
.single-card {
  max-width: 600px; 
  margin: 0 auto; 
}

.single-card .member-image {
  height: 450px; 
}

.single-card .member-info {
  padding: 30px; 
}

.single-card .member-name {
  font-size: 1.5rem; 
  margin-bottom: 15px; 
}

.single-card .member-description {
  font-size: 1.1rem; 
  line-height: 1.8; 
}

.member-card:hover {
  transform: translateY(-10px); 
  box-shadow: 0 15px 30px rgba(0,0,0,0.2); 
}

.member-image {
  width: 100%; 
  height: 400px; 
  overflow: hidden; 
}

.member-image img {
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  transition: transform 0.5s ease; 
}

.member-card:hover .member-image img {
  transform: scale(1.1); 
}

.member-info {
  padding: 20px; 
  text-align: center; 
}

.member-name {
  font-size: 1.2rem; 
  font-weight: 600; 
  color: #2c3e50; 
  display: inline-block; 
  margin-right: 10px; 
}

.member-position {
  font-size: 0.9rem; 
  color: #7f8c8d; 
  margin-bottom: 15px; 
  display: inline-block; 
  background-color: #f0f0f0; 
  padding: 3px 10px; 
  border-radius: 15px; 
}

.member-description {
  font-size: 0.95rem; 
  line-height: 1.6; 
  color: #34495e; 
}

/* 团队荣誉 */
.achievements-section {
  margin-bottom: 60px; 
}

.carousel-wrapper {
  position: relative; 
  width: 100%; 
  max-width: 1000px; 
  margin: 0 auto; 
  overflow: hidden; 
  border-radius: 8px; 
  box-shadow: 0 5px 15px rgba(0,0,0,0.1); 
}

.carousel-container {
  position: relative; 
  width: 100%; 
  height: 550px; /* 增加轮播高度以显示更多图片内容 */ 
  overflow: hidden; 
}

.carousel-item {
  position: absolute; 
  top: 0; 
  left: 0; 
  width: 100%; 
  height: 100%; 
  opacity: 0; 
  transition: opacity 0.5s ease; 
}

.carousel-item.active {
  opacity: 1; 
  z-index: 1; 
}

.carousel-item img {
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  display: block; 
}

.carousel-caption {
  position: absolute; 
  bottom: 0; 
  left: 0; 
  right: 0; 
  padding: 20px; 
  background: linear-gradient(transparent, rgba(0,0,0,0.7)); 
  color: white; 
  text-align: center; 
  z-index: 2; 
}

.carousel-caption h3 {
  font-size: 1.5rem; 
  margin-bottom: 10px; 
  text-shadow: 0 2px 4px rgba(0,0,0,0.3); 
}

.carousel-caption p {
  font-size: 1rem; 
  text-shadow: 0 1px 2px rgba(0,0,0,0.3); 
}

.carousel-indicators {
  display: flex; 
  justify-content: center; 
  gap: 10px; 
  padding: 15px 0; 
  position: relative; 
  z-index: 3; 
}

.indicator-dot {
  width: 12px; 
  height: 12px; 
  border-radius: 50%; 
  background-color: rgba(255,255,255,0.5); 
  border: none; 
  cursor: pointer; 
  transition: background-color 0.3s ease; 
}

.indicator-dot.active {
  background-color: white; 
  box-shadow: 0 0 10px rgba(255,255,255,0.8); 
}

/* 页脚 */
.footer {
  background-color: #2c3e50; 
  padding: 40px 0; 
  color: white; 
  text-align: center; 
}

.footer-content {
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 30px; 
}

.footer-logo img {
  width: 100px; 
  height: auto; 
  margin-bottom: 20px; 
}

/* 鼠标拖尾效果 */
.mouse-circle {
  pointer-events: none; 
  position: fixed; 
  width: 40px; 
  height: 40px; 
  border-radius: 50%; 
  background: rgba(52, 152, 219, 0.3); 
  transform: translate(-50%, -50%); 
}