/* -------------------- 顶部区域与固定导航栏 -------------------- */

/* 顶部轮播区域 */
.header-banner {
  position: relative;
  width: 100%;
  height: 240px;
  z-index: 100;
  overflow: hidden;
}

.slider {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  transition: transform 1s ease;
}

.slider img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 1s ease;
  z-index: 0;
}

.slider img.active {
  opacity: 1;
  z-index: 1;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 10px 40px;
  display: flex;
  align-items: center;
  z-index: 200;
  background: transparent;
  transition: background 0.3s, color 0.3s;
}

.navbar .logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #fff;
}

.nav-links {
  list-style: none;
  display: flex;
  margin-left: auto;
  margin-right: 60px;
}

.nav-links li {
  margin-left: 20px;
}

.nav-links li a {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #fff;
  font-size: 1.2rem;
  transition: color 0.3s;
}

.nav-links li a i {
  font-size: 1.2rem;
  margin-right: 5px;
  transition: color 0.3s;
}

/* 滚动后导航栏样式 */
.navbar.scrolled {
  background: #fff;
  border-bottom: 1px solid #fff;
}

.navbar.scrolled .logo,
.navbar.scrolled .nav-links li a {
  color: #004097;
}

.navbar.scrolled .nav-links li a i {
  color: #004097;
}

/* -------------------- 正文内容区域 -------------------- */

.content-container {
  background: #fff;
  max-width: 1200px;
  margin: 160px auto 20px auto; /* 距离顶部内容区域适配 */
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* about 页面主体 */
.about {
  padding: 20px;
  text-align: center;
}

/* 每个块：个人联系方式、鸣谢、关于本站 */
.block {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 20px;
  margin-bottom: 40px;
}

/* 联系方式样式 */
.contact-block h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.contact-icons {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  gap: 40px;
}

.contact-item {
  position: relative;
  cursor: pointer;
}

.contact-icon {
  width: 40px;
  height: 40px;
  object-fit: cover;
}

.qr-code {
  display: none;
  position: absolute;
  top: 110%;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 120px;
  border: 1px solid #ccc;
  background: #fff;
  padding: 5px;
  z-index: 300;
}

.contact-item:hover .qr-code {
  display: block;
}

/* 鸣谢部分样式 */
.ack-block h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.acknowledge-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 1.2rem;
  color: #004097;
}

.acknowledge-item img.huawei-icon {
  width: 60px;
  height: auto;
}

/* 关于本站 */
.aboutsite-block h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.icp-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 1rem;
  color: #004097;
}

.icp-info img {
  width: 40px;
  height: auto;
}

/* 备案链接 */
.footer-link {
  color: #004097;
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

/* -------------------- 响应式调整 -------------------- */

@media (max-width: 768px) {
  .navbar {
    padding: 15px 20px;
  }

  .logo {
    font-size: 1.2rem;
  }

  .nav-links li {
    margin-left: 15px;
  }

  .nav-links li a {
    font-size: 1.1rem;
  }

  .nav-links li a i {
    font-size: 1.1rem;
  }

  .content-container {
    margin-top: 260px;
    padding: 15px;
  }

  .about h2 {
    font-size: 20px;
  }
}

@media (max-width: 480px) {
  .navbar {
    flex-direction: column;
    align-items: flex-end;
    padding: 10px;
  }

  .nav-links {
    margin-top: 5px;
    flex-direction: row;
  }

  .nav-links li {
    margin-left: 10px;
  }

  .content-container {
    margin-top: 260px;
    padding: 10px;
  }

  .about h2 {
    font-size: 18px;
  }
}