html and css3制作全屏导航条思路设计cid1115-前端设计

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 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>Document</title>
     <style>
     
     
      @import url('https://fonts.googleapis.com/css?family=Open+Sans:300,700|Shrikhand');
* {
  box-sizing: border-box;
}
body {
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.4;
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/225363/ales-krivec-38565-unsplash.jpg);
  background-size: cover;
    overflow: hidden;
}
@media (min-width: 450px) {
  body {
    font-size: 1.25rem;
  }
}
.page-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  overflow: visible;
  padding: 1rem;
  z-index: 200;
}
.page-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  min-height: 100vh;
  text-align: center;
  color: white;
}
         
         .page-content p{
             font-family:tahoma;
             background: white;
             color: #333;
             padding-top: 3px;
             padding-bottom: 3px;
             padding-left: 5px;
             padding-right: 5px;
             text-transform: uppercase;
             font-size: 14px;
             
         }
 
.page-title {
  margin-bottom: 1.5rem;
  font-family: Arial;
  font-size: 2rem;
  line-height: 1.2;
}
@media (min-width: 450px) {
  .page-title {
    font-size: 3rem;
  }
}
nav {
  display: flex;
  position: absolute;
  top: 0;
  left: 0;
  padding: 3rem 1rem 1rem;
  width: 100vw;
  min-height: 100vh;
  text-align: center;
  background-color: white;
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity 0.45s 0.45s ease, transform 0s 1.2s;
}
.menu ol {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 1rem;
  width: 100%;
    margin-left: -30px;
    margin-top: -5px;
    
}
@media (min-width: 820px) {
  .menu ol {
    grid-template-columns: repeat(4, 1fr);
  }
}
.menu ol li {
  display: grid;
  grid-column: span 1;
  grid-gap: 1rem;
  overflow: hidden;
}
.menu ol a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  width: 100%;
  height: 100%;
  font-size: 1.25rem;
  text-decoration: none;
  color: #2269bb;
    text-transform: uppercase;
  background-color: #2269bb;
  border-radius: 2px;
}
@media (min-width: 450px) {
  .menu ol a {
    font-size: 1.75rem;
  }
}
.menu > ol > li:nth-child(n + 3) {
  grid-column: span 2;
}
.menu .sub-menu {
  padding: 0;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 500px) {
  .menu .sub-menu {
    grid-template-columns: repeat(3, 1fr);
  }
}
.menu .sub-menu li a {
  font-size: 0.85rem;
  color: #16457a;
  background-color: #16457a;
}
@media (min-width: 450px) {
  .menu .sub-menu li a {
    font-size: 1rem;
  }
}
.menu .sub-menu li:nth-child(3n) {
  grid-column: span 2;
}
@media (min-width: 500px) {
  .menu .sub-menu li:nth-child(3n) {
    grid-column: span 1;
  }
}
.menu-toggle {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-gap: 2px;
  position: relative;
  cursor: pointer;
  width: 28px;
  height: 22px;
  z-index: 100;
}
.menu-toggle:before {
  content: '×';
  position: absolute;
  top: 0;
  left: 0;
  font-size: 2.4rem;
  line-height: 0.4;
  color: #123965;
  z-index: 2;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.menu-toggle span {
  display: block;
  position: relative;
  width: 100%;
  height: 2px;
  background-color: #123965;
  border-radius: 2px;
  transition: transform 0.3s ease;
  transform-origin: 100% 100%;
}
.menu-toggle span:nth-child(1) {
  transition-delay: 0.35s;
}
.menu-toggle span:nth-child(2) {
  transition-delay: 0.4s;
}
.menu-toggle span:nth-child(3) {
  transition-delay: 0.45s;
}
.menu-toggle span:nth-child(4) {
  transition-delay: 0.5s;
}
.menu-toggle span:nth-child(5) {
  transition-delay: 0.55s;
}
.menu-toggle span:nth-child(6) {
  transition-delay: 0.6s;
}
.menu-toggle span:nth-child(1), .menu-toggle span:nth-child(2) {
  grid-column: span 3;
}
.menu-toggle span:nth-child(3), .menu-toggle span:nth-child(6) {
  grid-column: span 2;
}
.menu-toggle span:nth-child(4), .menu-toggle span:nth-child(5) {
  grid-column: span 4;
}
#menu-toggle-input {
  display: none;
}
#menu-toggle-input:checked ~ .menu-toggle span {
  transform: scaleX(0);
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(1) {
  transition-delay: 0.05s;
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(2) {
  transition-delay: 0.1s;
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(3) {
  transition-delay: 0.15s;
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(4) {
  transition-delay: 0.2s;
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(5) {
  transition-delay: 0.25s;
}
#menu-toggle-input:checked ~ .menu-toggle span:nth-child(6) {
  transition-delay: 0.3s;
}
#menu-toggle-input:checked ~ .menu-toggle:before {
  opacity: 1;
  transition-delay: 0.75s;
}
#menu-toggle-input:checked ~ nav {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0s;
}
#menu-toggle-input:checked ~ nav a {
  color: white;
  transform: translate(0, 0);
}
#menu-toggle-input:checked ~ nav > ol > li:nth-child(1) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.35s ease;
}
#menu-toggle-input:checked ~ nav .sub-menu > li:nth-child(1) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.5s ease;
}
#menu-toggle-input:checked ~ nav > ol > li:nth-child(2) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.4s ease;
}
#menu-toggle-input:checked ~ nav .sub-menu > li:nth-child(2) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.55s ease;
}
#menu-toggle-input:checked ~ nav > ol > li:nth-child(3) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.45s ease;
}
#menu-toggle-input:checked ~ nav .sub-menu > li:nth-child(3) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.6s ease;
}
#menu-toggle-input:checked ~ nav > ol > li:nth-child(4) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.5s ease;
}
#menu-toggle-input:checked ~ nav .sub-menu > li:nth-child(4) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.65s ease;
}
#menu-toggle-input:checked ~ nav > ol > li:nth-child(5) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.55s ease;
}
#menu-toggle-input:checked ~ nav .sub-menu > li:nth-child(5) > a {
  transition: color 0.3s 0.825s, transform 0.3s 0.7s ease;
}
.menu > ol > li:nth-child(1) > a {
  transform: translate(calc(-100% - 12px), 0);
  transition: color 0.3s, transform 0.3s 0.2s ease;
}
.sub-menu > li:nth-child(1) > a {
  transform: translate(0, calc(-100% - 12px));
  transition: color 0.3s, transform 0.3s 0.2s ease;
}
.menu > ol > li:nth-child(2) > a {
  transform: translate(calc(-100% - 12px), 0);
  transition: color 0.3s, transform 0.3s 0.25s ease;
}
.sub-menu > li:nth-child(2) > a {
  transform: translate(0, calc(-100% - 12px));
  transition: color 0.3s, transform 0.3s 0.25s ease;
}
.menu > ol > li:nth-child(3) > a {
  transform: translate(calc(-100% - 12px), 0);
  transition: color 0.3s, transform 0.3s 0.3s ease;
}
.sub-menu > li:nth-child(3) > a {
  transform: translate(0, calc(-100% - 12px));
  transition: color 0.3s, transform 0.3s 0.3s ease;
}
.menu > ol > li:nth-child(4) > a {
  transform: translate(calc(-100% - 12px), 0);
  transition: color 0.3s, transform 0.3s 0.35s ease;
}
.sub-menu > li:nth-child(4) > a {
  transform: translate(0, calc(-100% - 12px));
  transition: color 0.3s, transform 0.3s 0.35s ease;
}
.menu > ol > li:nth-child(5) > a {
  transform: translate(calc(-100% - 12px), 0);
  transition: color 0.3s, transform 0.3s 0.4s ease;
}
.sub-menu > li:nth-child(5) > a {
  transform: translate(0, calc(-100% - 12px));
  transition: color 0.3s, transform 0.3s 0.4s ease;
}

     
     </style>
 </head>
 <body>
     <header class="page-header">
  <input id="menu-toggle-input" type="checkbox" />
  <label class="menu-toggle" for="menu-toggle-input">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </label>

   

  <nav class="menu">
    <ol>
      <li class="menu-item"><a href="#0">Home</a></li>
      <li class="menu-item"><a href="#0">About</a></li>
      <li class="menu-item">
        <a href="#0">Widgets</a>
        <ol class="sub-menu">
          <li class="menu-item"><a href="#0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Big Widgets</a></li>
          <li class="menu-item"><a href="#0">Bigger Widgets</a></li>
          <li class="menu-item"><a href="#0">Huge Widgets</a></li>
        </ol>
      </li>
      <li class="menu-item">
        <a href="#0">Kabobs</a>
        <ol class="sub-menu">
          <li class="menu-item"><a href="#0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Shishkabobs</a></li>
          <li class="menu-item"><a href="#0">BBQ kabobs</a></li>
          <li class="menu-item"><a href="#0">Summer kabobs</a></li>
        </ol>
      </li>
      <li class="menu-item"><a href="#0">Contact</a></li>
    </ol>
  </nav>
</header>

<section class="page-content">
  <h1 class="page-title">CSS3 BOX MENU DESIGN</h1>
  <p>Click the toggle in the top left corner to see it in action </p>
</section>
 </body>
 </html>

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