CSS实现3D菜单效果

效果

index.html

doctype html>

  
    
    CSS实现3D菜单效果
	
    
	
  
  
    
      
		  
			  
				  
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index.css

*
{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Oswald', sans-serif;
}
body 
{
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #434750;
  gap: 130px;
}
ul 
{
  position: relative;
  transform: skewY(-15deg);
}
ul li 
{
  position: relative;
  list-style: none;
  width: 120px;
  padding: 15px;
  background: #3e3f46;
  z-index: calc(1 * var(--i));
  transition: 0.5s;
}
ul li:hover 
{
  background: var(--clr);
  transform: translateX(-50px);
}
ul li::before 
{
  content: '';
  position: absolute;
  top: 0;
  left: -40px;
  width: 40px;
  height: 100%;
  background: #3e3f46;
  filter: brightness(0.7);
  transform-origin: right;
  transform: skewY(45deg);
  transition: 0.5s;
}
ul li:hover::before 
{
  background: var(--clr);
  filter: brightness(0.7);
}
ul li::after 
{
  content: '';
  position: absolute;
  top: -40px;
  left: 0px;
  width: 100%;
  height: 40px;
  background: #3e3f46;
  filter: brightness(0.9);
  transform-origin: bottom;
  transform: skewX(45deg);
  transition: 0.5s;
}
ul li:hover::after 
{
  background: var(--clr);
  filter: brightness(0.9);
}
ul li a 
{
  text-decoration: none;
  color: #999;
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: 0.5s;
}
ul li:hover a
{
  color: #fff;
}
ul li:last-child::after 
{
  box-shadow: -120px 120px 20px rgba(0,0,0,0.25);
}
ul li a span 
{
  position: absolute;
  top: 0;
  left: -40px;
  width: 40px;
  text-align: center;
  height: 100%;
  transform-origin: right;
  transform: skewY(45deg);
  transition: 0.5s;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.25em;
  opacity: 0.5;
}
ul li:hover a span 
{
  opacity: 1;
}