css手风琴式多级下拉菜单效果代码-html代码-BFW代码库

代码语言：html

代码描述：css手风琴式多级下拉菜单效果代码

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">

    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/font-awesome-4.7.0/css/font-awesome.min.css">
    <link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/reset.min.css">
    <style>
        body {
            margin-top: 2rem;
            font: 100% "Open sans", "Trebuchet MS", sans-serif;
        }

        a {
            text-decoration: none;
        }

        /**
 * Hidden fallback
 */
        [hidden] {
            display: none;
            visibility: hidden;
        }

        /**
 * Styling navigation
 */
        header {
            margin-right: auto;
            margin-left: auto;
            max-width: 22.5rem;
            box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
        }

        /**
 * Styling top level items
 */
        .nav a,
        .nav label {
            display: block;
            padding: 0.85rem;
            color: #fff;
            background-color: #151515;
            box-shadow: inset 0 -1px #1d1d1d;
            transition: all 0.25s ease-in;
        }
        .nav a:focus, .nav a:hover,
        .nav label:focus,
        .nav label:hover {
            color: rgba(255, 255, 255, 0.5);
            background: #030303;
        }

        .nav label {
            cursor: pointer;
        }

        /**
 * Styling first level lists items
 */
        .group-list a,
        .group-list label {
            padding-left: 2rem;
            background: #252525;
            box-shadow: inset 0 -1px #373737;
        }
        .group-list a:focus, .group-list a:hover,
        .group-list label:focus,
        .group-list label:hover {
            background: #131313;
        }

        /**
 * Styling second level list items
 */
        .sub-group-list a,
        .sub-group-list label {
            padding-left: 4rem;
            background: #353535;
            box-shadow: inset 0 -1px #474747;
        }
        .sub-group-list a:focus, .sub-group-list a:hover,
        .sub-group-list label:focus,
        .sub-group-list label:hover {
            background: #232323;
        }

        /**
 * Styling third level list items
 */
        .sub-sub-group-list a,
        .sub-sub-group-list label {
            padding-left: 6rem;
            background: #454545;
            box-shadow: inset 0 -1px #575757;
        }
        .sub-sub-group-list a:focus, .sub-sub-group-list a:hover,
        .sub-sub-group-list label:focus,
        .sub-sub-group-list label:hover {
            background: #333333;
        }

        /**
 * Hide nested lists
 */
        .group-list,
        .sub-group-list,
        .sub-sub-group-list {
            height: 100%;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease-in-out;
        }

        .nav__list input[type=checkbox]:checked + label + ul {
            /* reset the height when checkbox is checked */
            max-height: 1000px;
        }

        /**
 * Rotating chevron icon
 */
        label > span {
            float: right;
            transition: transform 0.65s ease;
        }

        .nav__list input[type=checkbox]:checked + label > span {
            transform: rotate(90deg);
        }

        /**
 * Styling footer
 */
        footer {
            padding-top: 1rem;
            padding-bottom: 1rem;
            background-color: #050505;
        }

        .soc-media {
            display: flex;
            justify-content: center;
        }

        .soc-media li:nth-child(n+2) {
            margin-left: 1rem;
        }

        .soc-media a {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.65);
            transition: color 0.25s ease-in;
        }
        .soc-media a:focus, .soc-media a:hover {
            color: rgba(255, 255, 255, 0.2);
        }
    </style>

</head>
<body>

    <header role="banner">
        <nav class="nav" role="navigation">
            <ul class="nav__list">
                <li>
                    <input id="group-1" type="checkbox" hidden />
                    <label for="group-1"><span class="fa fa-angle-right"></span> First level</label>
                    <ul class="group-list">
                        <li><a href="#">1st level item</a></li>
                        <li>
                            <input id="sub-group-1" type="checkbox" hidden />
                            <label for="sub-group-1"><span class="fa fa-angle-right"></span> Second level</label>
                            <ul class="sub-group-list">
                                <li><a href="#">2nd level nav item</a></li>
                                <li><a href="#">2nd level nav item</a></li>
                                <li><a href="#">2nd level nav item</a></li>
                                <li>
                                    <input id="sub-sub-group-1" type="checkbox" hidden />
                                    <label for="sub-sub-group-1"><span class="fa fa-angle-right"></span> Third level</label>
                                    <ul class="sub-sub-group-list">
                                        <li><a href="#">3rd level nav item</a></li>
                                        <li><a href="#">3rd level nav item</a></li>
                                        <li><a href="#">3rd level nav item</a></li>
                                    </ul>
          .........完整代码请登录后点击上方下载按钮下载查看