.index_blog_item {  
  --mask: linear-gradient(to bottom, 
      rgba(0,0,0, 1) 0,   rgba(0,0,0, 1) 40%, 
      rgba(0,0,0, 0) 95%, rgba(0,0,0, 0) 0
  ) 100% 50% / 100% 100% repeat-x;
  -webkit-mask: var(--mask); 
  mask: var(--mask);
  max-height:300px;
  overflow:hidden;
}

h2{margin-top: 1.0em;}