html网页网站顶部自适应导航栏，菜单栏

html & js：

	

		

			
		
		
		

			
		
		

			

				
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css：

*{margin:0;padding:0;list-style-type:none;}

.container{max-width:1140px;margin:0 auto;}

.c-nav .show{
	display: inline-block;
}
.c-nav .hiden{
	display: none;
}
/* 导航栏 */
.c-nav{
	width: 100%;
	background-color: black;
	
}
.c-nav .navFlex{
	display: flex;
	display: -webkit-flex;
	justify-content:space-between;
	-webkit-justify-content: space-between;
	align-items: center;
	-webkit-align-content: center;
	color: white;
}
.c-nav ul{
	list-style: none;
	margin-bottom: 0px;
	padding-left: 0px;
}
.c-nav ul li{
	padding: 15px 0px 15px 0px;
	margin-left: 30px;
	display: inline-block;
}
.c-nav ul li a{
	color: white;
	padding-bottom: 2px;
	text-decoration: none;
	border-bottom: 3px solid transparent;
}
.c-nav ul li a:hover{
	border-bottom: 3px solid #e4c17e;
}
.c-nav .logo{
	height:40px;
}
.c-nav .btnImg{
	height: 20px;
	width: 25px;
	padding: 3px 8px 3px 8px;
	box-sizing: content-box;
	border: 1px solid transparent;
}
@media screen and (max-width:1200px){
	.c-nav ul li{
		margin-left: 20px;
	}
}
@media screen and (max-width:992px){
	.c-nav ul li{
		margin-left: 10px;
	}
}
@media screen and (max-width:768px){
	.c-nav ul li:nth-child(4),.c-nav ul li:nth-child(5){
		display: none;
	}
}
@media screen and (max-width:576px){
	.c-nav{
		background-color:rgba(176,204,243,0.8);
		padding: 10px 0px 10px 0px;
		opacity: 0.9;
	}
	.c-nav .navFlex{
		flex-wrap:wrap;
		font-size: 20px;
		justify-content: space-between;
	}
	.c-nav .logo{
		height: 30px;
	}
	.c-nav ul li{
		padding-top: 10px;
		margin-left: 0px;
		display: block;
	}
	.c-nav ul li a{
		border-bottom: 3px solid transparent;
	}
	.c-nav ul a:hover{
		border-bottom: 3px solid #e4c17e;
	}
	.c-nav ul li:nth-child(4),.c-nav ul li:nth-child(5){
		display: block;
	}
	.c-nav .hiden{
		display: block;
	}
	.c-nav .show{
		width: 100%;
		font-size: 14px;
		text-align: center;
		display: none;
	}
}

素材图： ←透明图保存后查看

注：本程序依赖于jquery库，请自行下载并选择合适路径或使用远程cdn地址：https://cdn.bootcss.com/jquery/3.4.1/jquery.js