.isexpanded {
    /* display: none; */
    overflow: hidden;
    
    transition: max-height 0.8s cubic-bezier(0, 1.05, 0, 1);;
    max-height: 0;
}

.active > .isexpanded {
    /* display: block; */
    transition: max-height 0.8s;
    max-height: 2000px;

    float: left;
    width: 100%;
}

.title {
    cursor: pointer;
    position: relative;

    float: left;
    width: 100%;
}
.arrow {
    position: absolute;
    z-index: 99;
    right: 10px;
    top: 14px;
}
.arrow:after {
    color: white;
    content:'\2303';
    font-size: 28px;
}

.active .title > .arrow {
    transform: rotate(180deg);
}


.theme-basic-gray {
    background-color: #F9F9F9;
    border-radius: 4px;
    margin-bottom: 15px;

    float: left;
    width: 100%;
}

.theme-basic-gray .arrow:after {
    color: #30302E;
}
.theme-basic-gray > .title,
.theme-basic-gray > .isexpanded > .content {
    padding: 20px;
    float: left;
    width: 100%;
}