/* 头部外层：保证背景通栏 */
.site-header {
  width: 100%;
}

/* 导航主容器：与 banner 左对齐，半透明背景 */
.header_top {
max-width: 1620px;
width: 90%;
margin: auto;
  min-height: 5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.5);
}

/* Logo 图片 */
.image-title {
  flex-shrink: 0;
  width: 14.8125%;
  max-width: 14.2rem;
  height: auto;
  margin: 0;
  object-fit: contain;
}

/* 导航菜单列表 */
.top-title {
  flex: 1;
  display: flex;
 justify-content: flex-end;
  align-items: center;
  gap: calc(17px + 2rem);
}

/* 导航菜单项 */
.top-title-item {
  margin: 0;
  font-size: 0.9rem;
  line-height: 2.4rem;
  white-space: nowrap;
  font-family: PingFang SC;
  font-weight: bold;
  color: #333333;
}

/* 菜单链接样式（让颜色继承自父级） */
.top-title-item a {
  text-decoration: none;
  color: inherit;
}

/* 当前高亮菜单项（由 PHP 动态添加 .active 类） */
.top-title-item.active {
  color: #bfa151;
}