div+css实现下拉翻转多级菜单导航条效果代码-html代码-BFW代码库

代码语言：html

代码描述：div+css实现下拉翻转多级菜单导航条效果代码

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">
  


  
  
<style>
body {
  margin: 0;
  font-family: Helvetica;
  font-size: 11px;
  text-transform: uppercase;
}

ul {
  list-style-type: none;
  padding: 0;
}

a {
  text-decoration: none;
  color: inherit;
}

nav {
  margin-top: 20px;
  width: 100%;
  display: flex;
  justify-content: center;
}
nav ul.navigation-menu {
  display: flex;
  background-color: #264653;
  color: white;
  height: 50px;
  width: 700px;
  border-radius: 5px;
  box-shadow: 1px 1px 10px 3px rgba(0, 0, 0, 0.1);
}
nav ul.navigation-menu li {
  flex: 1;
}
nav ul.navigation-menu li a {
  cursor: pointer;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
nav ul.navigation-menu li ul {
  display: flex;
  flex-direction: column;
  width: auto;
  border-radius: 0px;
  background-color: transparent;
  flex-direction: column;
  perspective: 500px;
  box-shadow: none;
}
nav ul.navigation-menu li ul li {
  height: 50px;
  text-align: center;
  line-height: 50px;
  cursor: pointer;
  display: none;
  opacity: 0;
}
nav ul.navigation-menu li ul li ul {
  position: absolute;
  top: 0px;
  left: 100%;
  width: 200px;
}
nav ul.navigation-menu li ul li ul li {
  display: none;
}

nav ul.navigation-menu li ul li {
  background-color: #2a9d8f;
}
nav ul.navigation-menu li ul li ul li {
  background-color: #144d46;
}

nav ul.navigation-menu li {
  transition: all 0.3s ease-in-out;
}
nav ul.navigation-menu li:hover {
  background-color: #1e3742;
}
nav ul.navigation-menu li:hover ul li {
  display: block;
  transition: all 0.3s ease-in-out;
}
nav ul.navigation-menu li:hover ul li:hover {
  background-color: #1f756a;
}
nav ul.navigation-menu li:hover ul li ul li {
  display: none;
}
nav ul.navigation-menu li:hover ul li:hover ul li {
  display: block;
}

nav ul.navigation-menu li:hover ul li:nth-child(1) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 100ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(2) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 200ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(3) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 300ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(4) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 400ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(5) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 500ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(6) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 600ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(7) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 700ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(8) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 800ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(9) {
  animation-name: menu-1;
  animation-timing-function: ease-in-out;
  animation-duration: 300ms;
  animation-delay: 900ms;
  animation-fill-mode: forwards;
}
nav ul.navigation-menu li:hover ul li:nth-child(10) {
  ani.........完整代码请登录后点击上方下载按钮下载查看