.category_body02 {
    padding: 50px;
    max-width: 1000px;
    margin: 0 auto;
    line-height: 3;
}
.center{
    text-align: center;
}
.category_box .txt_box h2 .small {
    font-size: 47%;
}
.category_body .inner {
    width: 100%;
    max-width: 1000px;
    margin: auto;
}
.brainboost {
    padding: 10px 50px;
}
table{
    margin: 0 auto 2em;
}
.category_body .inner .txt_box table h3{
    margin-bottom: 0;
}
.tag{
    border-radius: 30px;
    border: 1px solid #3785c3;
    max-width: 230px;
    font-size: 1.4rem;
    color: #3785c3;
    text-align: center;
    padding: 0 10px;
    height: 30px;
    align-items: center;
    line-height: 2!important;
        margin-bottom: 0!important;
    margin-left: 10px;
}
.flex{
    display: flex;
}
.category_body02 .btn_box{
max-width: 1000px;
margin: 0 auto;
}
.category_body02 .btn_box li{
        margin: 1em auto;
    max-width: 300px;
}
.brainboost_link{
    max-width: 390px;
    margin: 0 auto 3em;
}
.brainboost_link a{
    text-align: center;
    text-decoration: none;
    color: #3785c3;
    position: relative;
    margin: 0 auto 2em;
        max-width: 490px;
            font-family: 'Noto Sans JP', sans-serif;
}
 .brainboost_link a::before {
    content: '';
    position: absolute;
    left: -1em;
    top: .6em;
    width: .5em;
    height: .5em;
    border-top: 2px solid #3785c3;
    border-right: 2px solid #3785c3;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    transition: all .3s ease;
}
.brainboost_link a {
  position: relative;
  display: inline-block;
  text-decoration: none;
  color:#3785c3;
}
.brainboost_link a::after {
  position: absolute;
  bottom: 0;
  left: 0;
  content: '';
  width: 100%;
  height: 1px;
  background: #3785c3;
  transform: scale(0, 1);
  transform-origin: center top;
  transition: transform .3s;
}
.brainboost_link a:hover::after {
  transform: scale(1, 1);
}

@media screen and (max-width: 767px) {
    .category_body02 {
        max-width: 100%;
        width: 100%;
}
.lead p {
font-size: 1.2rem;
line-height: 2;
}
.brainboost table td{
    display: block;
    margin: 0 auto;
}
.brainboost .txt_box p {
    max-width: 100%;
    display: block;
    font-size: 1.5rem;
    margin: 1em auto 0;
}
.brainboost_link {
    max-width: 220px;
    margin: 0 auto 3em;
    width: 100%;
}
.brainboost_link a {
    font-size: 1.5rem;
}
}