.so-tab {
    position: relative;
    width: 100%;
    overflow: hidden;
    }
    .so-tab label {
    position: relative;
    display: block;
    padding: 0 25px 0 0;
    margin-bottom: 15px;
    line-height: normal;
    cursor: pointer;
    }
    .so-tab input {
    position: absolute;
    opacity: 0;
    z-index: -1;
    }
    .so-tab-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s;
    }
    /* :checked */
    .so-tab input:checked ~ .so-tab-content {
    max-height: none;
    }
    /* Icon */
    .so-tab label::after {
    position: absolute;
    right: 0;
    top: -20px;
    display: block;
    width: 3em;
    height: 3em;
    line-height: 3;
    text-align: center;
    -webkit-transition: all .35s;
    -o-transition: all .35s;
    transition: all .35s;
    }
    .so-tab input[type=checkbox] + label::after {
    content: "+";
    }
    .so-tab input[type=radio] + label::after {
    content: "\25BC";
    }
    .so-tab input[type=checkbox]:checked + label::after {
    transform: rotate(315deg);
    }
    .so-tab input[type=radio]:checked + label::after {
    transform: rotateX(180deg);
    }