纯css下拉菜单

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html

css

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html

css

body {
  background: #ece5da;
font-family: 'Raleway', sans-serif;
}

nav {
  margin: auto;
  margin-top: 40px;
  position: relative;
  width: 50vw;
  min-width: 320px;
  height: 200px;
}

nav h2 {
  border-radius: 2px;
  position: relative;
  background: tomato;
  height: 40px;
  text-transform: uppercase;
  color: ivory;
  font-weight: 200;
  display: flex;
  flex: 1;
  justify-content: center;
  align-items: center;
  box-shadow: 4px 4px 20px -2px rgba(0,0,0,.35);
  transition: all .4s;
}

nav:hover h2{
  transform: translateY(-2px);
  box-shadow: 2px 2px 5px -1px rgba(0,0,0,.35);
 }
nav:hover:active h2{
  transform: translateY(10px);
  box-shadow: 0px -1px 2px 0px rgba(0,0,0,.35);
 }

input {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 1;
    opacity: 0;
    cursor: pointer;
    height: 40px;
}

#toggle:checked ~ul {
  height: 0%;
}

nav ul {
  padding-left: 0;
  padding-top: 0;
  margin-top: 0;
  list-style: none;
  overflow: hidden;
  text-align: right;
  margin-bottom: 22px;
  text-align: center;
  transition: all .4s ease-out;
  height: 100%;
  
}
nav ul li {
  border-radius: 2px;
  position: relative;
  display: inline-block;
  margin-left: 35px;
  line-height: 1.5;
  width: 100%;
  margin: 0;
  margin-bottom: 5px;
  background: tomato;
  transition: background 3s;
  box-shadow: 2px 2px 10px -2px rgba(0,0,0,.35);
}

nav ul li:hover {
  background: mediumorchid;
  transition: background .45s;
}

nav ul li:hover a:active, li {
  color: tomato;
}

nav ul a {
  display: block;
  color: ivory;
  text-transform: lowercase;
  font-size: 18px;
  font-weight: 200;
  text-decoration: none;
  transition: color .3s;
}

JavaScript

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