.content_block {
    overflow: hidden;
    position: relative;
    max-height: 200px;
}
.content_block:after {
    height: 3.8125rem;
    width: 100%;
    display: block;
    content: '';
    position: absolute;
    right: 0;
    left: 0;
    bottom: 0;
    background: linear-gradient(to bottom,rgba(255,255,255,0) 0,rgba(255,255,255,.45) 26%,#fff 63%,#fff 100%);
    z-index: 5;
    pointer-events: none;
}
.content_block.show {
    max-height: 10500px;
    overflow: visible;
}
.content_block.show:after {
    display: none;
}
.btn-content-toggle {
    margin-top: 15px;
    background: none;
    border: none;
    text-decoration: underline; 
    color: #5EA623;
    cursor: pointer;
}