/* 顶部导航栏基础样式 */
.full-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 32px;
  height: 70px;

  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(0, 0, 0, 0.7);

  /* ✅ 保留模糊（支持透明图层更自然） */
  /* backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px); */

  color: #fff;
}


/* header内容容器 */
.header-container {
  /* 最大宽度1200px */
  max-width: 1400px;
  /* 占100%父容器宽度 */
  width: 100%;
  /* 整个容器水平居中 */
  margin: 0 auto;
  /* 启用 Flex 布局 */
  display: flex;
  /* 子元素左右两端对齐，之间平分空间 */
  justify-content: space-between;
  /* 内部元素垂直居中 */
  align-items: center;
}
/* Logo 样式 */
.header-container img {
  height: 40px;
  width: auto;
}
/* 右侧导航链接 */
.header-nav {
  display: flex;
  /* 子元素之间的间距 */
  gap: 24px;
}
.header-nav a {
  color: #fff;
  /* 默认下划线去除 */
  text-decoration: none;
  font-size: 16px;
  transition: color 0.5s;
}
.header-nav a:hover {
  color: #ffd700;
}
/* contact us */
.fixed-contact-link {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #f5f5f5;
    color: black;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: bold;
    text-decoration: underline;
    /* box-shadow: 0 4px 12px rgba(0,0,0,0.2); */
    transition: background 0.5s ease, transform 0.5s ease;
    z-index: 1000; /* 确保在最上层 */
}

.fixed-contact-link:hover {
    background: rgba(0,0,0,0.7);
    color: white;
    transform: translateY(-3px);
    text-decoration: underline;
}