css实现左侧可伸缩多级菜单效果代码-html代码-BFW代码库

代码语言：html
代码描述：css实现左侧可伸缩多级菜单效果代码
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">


    <link href="https://fonts.googleapis.com/css?family=Work+Sans:400,800" rel="stylesheet">

    <link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/font-awesome-4.7.0/css/font-awesome.min.css">

    <style>
        body {
          font-family: 'Work Sans', sans-serif;
          margin: 0;
          background-color: #eee;
        }
        
        /* Layout */
        
        #container {
          padding: 0;
          margin: 0;
          background-color: #fff;
        }
        
        #main {
          padding: 4% 1.5em;
          max-width: 55em;
          margin: 0 auto;
        }
        
        #header {
          padding: 1.5em;
          margin: 0 0 1em 0;
          background-color: #eee;
        }
        
        #footer {
          padding: 1.5em;
          margin: 2em 0 0 0;
          background-color: #eee;
        
        }
        
        
        /* Menu Styles */
        
        .primary-nav {
        	position: fixed;
        	z-index: 999;
        }
        
        .menu {
        	position: relative;
        }
        
        .menu ul {
          margin: 0;
          padding: 0;
          list-style: none;
        	
        }
        
        .open-panel {
          border: none;
          background-color:#fff;
          padding: 0;
        }
        
        .hamburger {
        	background: #fff;
        	position: relative;
        	display: block;
        	text-align: center;
        	padding: 13px 0;
        	width: 50px;
          height: 73px;
        	left: 0;
          top: 0;
        	z-index: 1000;
          cursor: pointer;
        }
        
        .hamburger:before {
        	content:"\2630"; /* hamburger icon */
        	display: block;
          color: #000;
          line-height: 32px;
          font-size: 16px;
        }
        
        .openNav .hamburger:before {
        	content:"\2715"; /* close icon */
        	display: block;
          color: #000;
          line-height: 32px;
          font-size: 16px;
        }
        
        .hamburger:hover:before {
          color: #777;
        }
        
        .primary-nav .menu li {
        	position: relative;
        }
        
        .menu .icon {
        	position: absolute;
        	top: 12px;
        	right: 10px;
        	pointer-events: none;
          width: 24px;
          height: 24px;
          color: #fff;
        }
        
        .menu,
        .menu a,
        .menu a:visited {
          color: #aaa;
          text-decoration: none!important;
        	position: relative;
        }
        
        .menu a {
          display: block;
          white-space: nowrap;
          padding: 1em;
          font-size: 14px;
        }
        
        .menu a:hover {
        	color: #fff;
        }
        
        .menu {
        	margin-bottom: 3em;
        }
        
        .menu-dropdown li .icon {
        	color: #777;
        }
        
        .menu-dropdown li:hover .icon {
        	color: #fff;
        }
        
        
        
        .menu label {
          margin-bottom: 0;
          display: block;
        }
        
        .menu label:hover {
          cursor: pointer;
        }
        
        .menu input[type="checkbox"] {
          display: none;
        }
        
        input#menu[type="checkbox"] {
          display: none;
        }
        
        
        
        
        
        
        .sub-menu-dropdown {
        	display: none;
        }
        
        .new-wrapper {
        	position: absolute;
        	left: 50px;
          width: calc(100% - 50px);
          transition: transform .45s cubic-bezier(0.77, 0, 0.175, 1);
        }
        
        #menu:checked + ul.menu-dropdown {
            
        		left: 0;
            -webkit-animation: all .45s cubic-bezier(0.77, 0, 0.175, 1);
                    animation: all .45s cubic-bezier(0.77, 0, 0.175, 1);
        }
        
        .sub-menu-checkbox:checked + ul.sub-menu-dropdown {
            display: block!important;
            -webkit-animation: grow .45s cubic-bezier(0.77, 0, 0.175, 1);
                    animation: grow .45s cubic-bezier(0.77, 0, 0.175, 1);
        }
        
        
        .openNav .new-wrapper {
          position: absolute;
          transform: translate3d(200px, 0, 0);
          width: calc(100% - 250px);
          transition: transform .45s cubic-bezier(0.77, 0, 0.175, 1);
        }
        
        
        .downarrow {
          background: transparent;
        	position: absolute;
        	right: 50px;
        	top: 12px;
          color: #777;
          width: 24px;
          height: 24px;
          text-align: center;
          display: block;
        }
        
        .downarrow:hover {
          color: #fff;
        }
        
        .menu {
        	position: absolute;
        	display: block;
        	left: -200px;
          top: 0;
        	width: 250px;
          transition: all 0.45s cubic-bezier(0.77, 0, 0.175, 1);
          background-color: #000;
        	z-index: 999;
        }
        
        .menu-dropdown {
          top: 0;
          overflow-y: auto;
        }
        
        .overflow-container {
          position: relative;
          height: calc(100vh - 73px)!important;
          overflow-y: auto;
          border-top: 73px solid #fff;
          z-index: -1;
          display:block;
        }
        
        .menu a.logotype {
          position: absolute!important;
          top: 11px;
          left: 55px;
          display: block;
          font-family: 'Work Sans', sans-serif;
          text-transform: uppercase;
          font-weight: 800;
          color: #000;
          font-size: 21px;
          padding: 10px;
        }
        
        .menu a.logotype span {
          font-weight: 400;
        }
        
        .menu a.logotype:hover {
          color: #777;
        }
        
        .sub-menu-dropdown {
        	background-color: #333;
        }
        
        .menu:hover {
        	position: absolute;
        	left: 0;
        	top: 0;
        }
        
        .openNav .menu:hover {
        	position: absolute;
        	left: -200px;
        	top 73px;
        }
        
        .openNav .menu {
          top 73px;
        		transform: translate3d(200px, 0, 0);
            transition: transform .45s cubic-bezier(0.77, 0, 0.175, 1);
        }
        	
        	/* label.hamburger {
        		display: none;
        	} */
        
        
        
        
        
        
        
        
        
        
        
        
        
        /* look and feel only, not needed for core menu*/
        
        @-webkit-keyframes grow {
        	
          0% {
            display: none;
            opacity: 0;
          }
          50% {
            display: block;
            opacity: 0.5;
          }
          100% {
            opacity: 1;
          }
        	
        }
        
        @keyframes grow {
        	
          0% {
            display: none;
            opacity: 0;
          }
          50% {
            display: block;
            opacity: 0.5;
          }
          100% {
            opacity: 1
          }
        	
        }
        
        
        
        
        
        
        
        
        
        
        /* Text meant only for screen readers. */
        
        .screen-reader-text {
          clip: rect(1px, 1px, 1px, 1px);
          position: absolute !important;
          height: 1px;
          width: 1px;
          overflow: hidden;
        }
        
        .screen-reader-text:focus {
          background-color: #f1f1f1;
          border-radius: 3px;
          -webkit-box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
                  box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.6);
          clip: auto !important;
          color: #21759b;
          display: block;
          font-size: 14px;
          font-size: 0.875rem;
          font-weight: bold;
          height: auto;
          left: 5px;
          line-height: normal;
          padding: 15px 23px 14px;
          text-decoration: none;
          top: 5px;
          width: auto;
          z-index: 100000;
          /* Above WP toolbar. */
        }
        
        
        
        
        
        
        
        
        
        
        
        /* Resposive Typography */
        
        
        body,
        button,
        input,
        select,
        optgroup,
        textarea {
        	color: #000;
        	font-size: .........完整代码请登录后点击上方下载按钮下载查看