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HTML

              
                <div class="acordeon">
			<div class="acordeon__item">
				<input type="radio" name="acordeon" id="item1">
				<label for="item1" class="acordeon__titulo">Título 1</label>
				<p class="acordeon__contenido">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nobis quod dolorem nam iste laudantium doloremque perspiciatis assumenda, corporis minima, eligendi molestiae dolorum facere iure cum excepturi inventore expedita magni dolores.</p>
			</div>
			<div class="acordeon__item">
				<input type="radio" name="acordeon" id="item2">
				<label for="item2" class="acordeon__titulo">Título 2</label>
				<p class="acordeon__contenido">Accusantium et vel ipsam accusamus, quidem. Quisquam, sunt, alias doloribus fugiat accusantium dolores voluptatibus. Facere, enim, voluptatibus. Odio suscipit, possimus laboriosam debitis alias, nemo deleniti eius, recusandae architecto provident sit?</p>
			</div>
			<div class="acordeon__item">
				<input type="radio" name="acordeon" id="item3">
				<label for="item3" class="acordeon__titulo">Título 3</label>
				<p class="acordeon__contenido">Adipisci iure temporibus quae voluptate nemo ipsum aperiam ipsa ratione magni, quibusdam consequatur tempore illo, molestias illum eligendi labore necessitatibus cum minima. Et voluptatibus quos molestias dignissimos, officia minus, maxime.</p>
			</div>
			<div class="acordeon__item">
				<input type="radio" name="acordeon" id="item4">
				<label for="item4" class="acordeon__titulo">Título 4</label>
				<p class="acordeon__contenido">Quo voluptate deleniti, maiores natus, voluptas veniam, omnis fugit recusandae dignissimos dolores sequi quibusdam explicabo velit eligendi suscipit quod? Totam optio error odit, dicta facere et quae sint natus quaerat.</p>
			</div>
		</div>
              
            
!

CSS

              
                * {
	box-sizing: border-box;
}

.acordeon input {
	display: none;
}

.acordeon__titulo {
	display: block;
	padding: 15px;
	background: crimson;
	color: #fff;
	font-size: 20px;
	cursor: pointer;
	border-bottom: 1px solid #fff;
}
.acordeon__titulo:hover {
	background: rgba(220, 20, 60, 0.8);
}

.acordeon__contenido {
	height: 0;
	overflow: hidden;
	margin: 0;
	transition: all 0.5s;
}

.acordeon input:checked ~ .acordeon__contenido{
	height: auto;
	margin: 15px 0;
}

              
            
!

JS

              
                
              
            
!
999px

Console