.topicdiv {
    padding: 10px;
}

.topic-title {
    font-size: 15px;
}

.topic-type {
    background: orange;
    padding: 2px 5px;
    border-radius: 15px;
    font-size: 14px;
    color: white;
    font-weight: 500;
}

.topic-option {
    margin-top: 5px;
}

    .topic-option .list > li {
        padding: 5px 8px;
        font-size: 14px;
    }

.topic-answer {
}
.css-show {
    display:block;
}
.css-hide {
    display: none;
}
.answer {
    background: #e6e6e6;
    padding: 5px 8px;
    font-size: 15px;
}

    .answer span {
        padding-right: 15px;
    }

        .answer span em {
            letter-spacing: 3px;
        }

.right {
    color: green;
}

.wrong {
    color: #fc2626;
}

.topic-explain {
    background: #e6e6e6;
    padding: 0px 10px 10px 0px;
    font-size: 14px;
}

.topic-btn {
    text-align: center;
    padding: 10px;
}

    .topic-btn button {
        margin: 2px 5px;
    }