.site_button {
    width: 172px;
    height: 52px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #002F7D;
    font-size: 16px;
    color: #fff;
    font-weight: 400;
    position: relative;
    z-index: 1;
    overflow: hidden;
    border: 1px solid transparent;
    transition: 0.6s !important;
}

.site_tw_btn {
    display: flex;
    flex-wrap: wrap;
}

.site_tw_btn a:nth-child(even) {
    margin: 0 0 0 10px;
}

.site_button:after {
    position: absolute;
    content: "";
    height: 100%;
    width: 0%;
    background: #111111;
    right: 0;
    left: auto;
    transition: 0.6s !important;
    z-index: -1;
}

.site_button:hover:after {
    width: 100%;
    left: 0;
    right: auto;
}

.site_button:hover {
    border: 1px solid #ddd;
}

@media all and (min-width: 320px) and (max-width: 767px) {
    .site_button {
        width: 125px;
        height: 35px;
        font-size: 14px;
    }
}

@media all and (min-width: 768px) and (max-width: 980px) {
    .site_button {
        width: 130px;
        height: 37px;
        font-size: 14px;
    }
}

@media only screen and (min-width: 981px) and (max-width: 1024px) {
    .site_button {
        width: 150px;
        height: 45px;
        font-size: 15px;
    }
}

@media all and (min-width: 1025px) and (max-width: 1140px) {
    .site_button {
        width: 150px;
        height: 45px;
        font-size: 15px;
    }
}

@media all and (min-width: 1141px) and (max-width: 1280px) {
    .site_button {
        width: 150px;
        height: 45px;
        font-size: 15px;
    }
}

@media all and (min-width: 1281px) and (max-width: 1440px) {
    .site_button {
        width: 165px;
        height: 50px;
    }
}

@media all and (min-width: 1441px) and (max-width: 1680px) {}

@media all and (min-width: 1681px) and (max-width: 1880px) {}