.three_btn01 {
 display: flex;
 flex-wrap: wrap;
 gap: 30px 40px;
 margin: 0 0 40px;
}

.three_btn01:last-child {
 margin: 0;
}

.three_btn01 .btn_area {
 width: calc((100% - 80px) / 3);
}

.three_btn01 .btn_area a {
 display: block;
 padding: 10px 0;
 text-align: center;
 color:  var(--main-color);
 text-decoration: none;
 font-weight: normal;
 font-size: 14px;
 font-size: 1.4rem;
 border: 2px solid var(--main-color);
 position: relative;
}

.three_btn01 .btn_area a:hover { 
 color: #fff;
 background: var(--main-color);
 border-color: var(--main-color);
}

.three_btn01 .btn_area a:after {
 content: '';
 width: 6px;
 height: 6px;
 border-top: 1px solid var(--main-color);
 border-right: 1px solid var(--main-color);
 transform: rotate(45deg);
 position: absolute;
 top: 50%;
 right: 15px;
 margin: -3px 0 0 0;
}

.three_btn01 .btn_area a:hover::after {
 border-color: #fff;
}

@media (max-width : 810px){
.three_btn01 .btn_area {
 width: calc((100% - 40px) / 2);
}
}

@media (max-width : 640px){
.three_btn01 .btn_area {
 width: 100%;
}
}