/* ボタン */
.btn a {
    background: #b1f07e;
    border-radius: 10px;
    position: relative;
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin: 0 auto;
    max-width: 280px;
    padding: 10px 25px;
    color: #313131;
    transition: 0.3s ease-in-out;
    font-weight: 500;
    border: 3px solid #48a750;
    text-decoration: none;
}
.btn a:hover {
    background: #48a750;
    color: #FFF;
}
.btn a:after {
    content: '';
    width: 5px;
    height: 5px;
    border-top: 3px solid #313131;
    border-right: 3px solid #313131;
    transform: rotate(45deg) translateY(-50%);
    position: absolute;
    top: 50%;
    right: 20px;
    border-radius: 1px;
    transition: 0.3s ease-in-out;
}
.btn a:hover:after {
    border-color: #FFF;
}

.exp{
    font-size: 0.9em;
}