.audio_cont {
    margin-bottom: 150px;
}

.audio_cont .portal_area,
.audio_cont .construction_area {
    margin: 0 auto;
}

.audio_cont .portal_area {
    margin-bottom: 60px;
}

.portal_area .item_link,
.construction_area .item_link {
    text-align: center;
}

.audio_cont .portal_area .heading02,
.audio_cont .construction_area .heading02 {
    display: flex;
    align-items: center;
    font-weight: bold;
    font-size: 24px;
    border-bottom: 3px solid #004386;
    margin-bottom: 15px !important;
    padding-bottom: 10px;
}

.portal_area .item_link a,
.construction_area .item_link a {
    display: inline-block;
    padding: 10px 30px;
    border: 1px solid #004386;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    transition: all 0.4s ease;
}

.item_link a:hover {
    background: #004386;
    color: #fff;
}

.portal_area_col2 {
    display: flex;
    justify-content: space-between;
}

.portal_area_function_text .heading03 {
    color: #0c63ca;
    font-weight: bold;
    margin-bottom: 10px;
    margin-top: 0;
}

.portal_area_function_text ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.portal_area_function_text ul li {
    line-height: 2rem;
}

@media screen and (max-width: 768px) {
    .tabNavigation_contents .conferencing_wrap img {
        width: auto;
        max-width: 90%;
    }

    .portal_area_function_text {
        width: 62%;
    }
}

@media screen and (max-width: 480px) {
    .portal_area_col2 {
        display: block;
    }

    .portal_area_function_text {
        width: 100%;
        margin: 30px auto;
    }
}