* {  
  box-sizing: border-box;  
}  

.tabbed {  
  width: 700px;  
  margin: 50px auto;  
}  

.tabbed > input {  
  display: none;  
}  

.tabbed > label {  
  display: block;  
  float: left;  
  padding: 12px 20px;  
  margin-right: 5px;  
  cursor: pointer;  
  transition: background-color .3s;  
}  

.tabbed > label:hover,  
.tabbed > input:checked + label {  
  background: #4EC6DE;  
}  

.tabs {  
  clear: both;  
  perspective: 600px;  
}  

.tabs > div {  
  width: 700px;  
  position: absolute;  
  border: 2px solid #4EC6DE;  
  padding: 10px 30px 40px;  
  line-height: 1.4em;  
  opacity: 0;  
  transform: rotateX(-20deg);  
  transform-origin: top center;  
  transition: opacity .3s, transform 1s;  
}  

#tab-nav-1:checked ~ .tabs > div:nth-of-type(1),  
#tab-nav-2:checked ~ .tabs > div:nth-of-type(2),  
#tab-nav-3:checked ~ .tabs > div:nth-of-type(3),  
#tab-nav-4:checked ~ .tabs > div:nth-of-type(4){  
  transform: rotateX(0deg);  
  opacity: 1;  
}  

@media screen and (max-width: 700px) {  
  .tabbed { width: 400px }  
  .tabbed > label { display: none }  
  .tabs > div {  
  width: 400px;  
  border: none;  
  padding: 0;  
  opacity: 1;  
  position: relative;  
  transform: none;  
  margin-bottom: 60px;  
  }  
  .tabs > div h2 {  
  border-bottom: 2px solid #4EC6DE;  
  padding-bottom: .5em;  
  }  
}

<div class="tabbed">  
  <input type="radio" name="tabs" id="tab-nav-1" checked>  
  <label for="tab-nav-1">Вкладка 1</label>  
  <input type="radio" name="tabs" id="tab-nav-2">  
  <label for="tab-nav-2">Вкладка 2</label>  
  <input type="radio" name="tabs" id="tab-nav-3">  
  <label for="tab-nav-3">Вкладка 3</label>  
  <input type="radio" name="tabs" id="tab-nav-4">  
  <label for="tab-nav-4">Вкладка 4</label>  
  <div class="tabs">  
  <div><h2>Заголовок 1</h2><p>Текст 1</p></div>  
  <div><h2>Заголовок 2</h2><p>Текст 2</p></div>  
  <div><h2>Заголовок 3</h2><p>Текст 3</p></div>  
  <div><h2>Заголовок 4</h2><p>Текст 4</p></div>  
  </div>  
  </div>  
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