#nav .menus_items {
    position: absolute;
    width: fit-content;
    left: 50%;
    transform: translateX(-50%);
}
#nav .menus_items .menus_item:hover .menus_item_child{
  display: flex;
}
/* 这里的5是代表导航栏的第五个元素，即有子菜单的元素，可以按自己需求修改 */
.menus_items .menus_item:nth-child(5) .menus_item_child {
    left: -65px;
}

/*顶部加载进度条*/
.pace {
	pointer-events: none;
	user-select: none;
	z-index: 2;
	position: fixed;
	margin: auto;
	top: 4px;
	left: 0;
	right: 0;
	height: 8px;
	border-radius: 8px;
	width: 6rem;
	background: #eaecf2;
	overflow: hidden;
  }
  
  .pace-inactive .pace-progress {
	opacity: 0;
	transition: 0.3s ease-in;
  }
  
  .pace.pace-inactive {
	opacity: 0;
	transition: 0.3s;
	top: -8px;
  }
  
  .pace .pace-progress {
	box-sizing: border-box;
	transform: translate3d(0, 0, 0);
	position: fixed;
	z-index: 2;
	display: block;
	position: absolute;
	top: 0;
	right: 100%;
	height: 100%;
	width: 100%;
	background: #49b1f5;
	background: linear-gradient(
	  to right,
	  rgb(18, 194, 233),
	  rgb(196, 113, 237),
	  rgb(246, 79, 89)
	);
	animation: gradient 2s ease infinite;
	background-size: 200%;
  }

#nav-right {
	flex: 1 1 auto;
	justify-content: flex-end;
	margin-left: auto;
	display: flex;
	flex-wrap: nowrap;
}