.navbar-custom {
    background: #070F27;
    backdrop-filter: blur(15.899999618530273px);
}

.main-bg {
    background: #242424;
}

.container-biendao {
    margin-block: 100px;
}

.title-biendao {
    color: #F2F2F2;
    text-align: center;
    font-size: 64px;
    font-style: normal;
    font-weight: 900;
    line-height: normal;
    letter-spacing: -3.2px;
    text-transform: uppercase;
}

.image-cover {
    padding-top: 100%;
    position: relative;
}

.image-cover img {
    object-fit: contain;
}

.box-all .image-cover svg {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 400px;
    height: 400px;
    transform: translate(-50%, -50%);
}

.gapgo {
    margin-top: 100px;
}

.sec-biendao {
    margin-top: 65px;
}

.sec-biendao .image-cover {
    height: 100%;
}

.sec-biendao .image-cover img {
    object-fit: cover;
}

.sec-biendao .box-all {
    height: 100%;
    display: block;
}

.sec-biendao .box-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    opacity: 1;
    padding: 0 10px 10px 10px;
    transition: opacity .1s ease .1s;
}

.sec-biendao .box-content .inner-b-content {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
    padding: 12px;
    width: 100%;
    backdrop-filter: blur(9px);
    border-radius: 8px;
}

.sec-biendao .box-image {
    border-radius: 16px;
}

.sec-biendao .box-image img {
    transition: all .2s ease;
}

.sec-biendao .box-image:hover img {
    scale: 1.2;
}

.box-content .inner-b-content .name {
    color: #FFF;
    font-size: 20px;
    font-style: normal;
    font-weight: 700;
    line-height: 28px; /* 140% */
}

.box-content .inner-b-content .vudieu {
    color: #FFF;
    font-size: 14px;
    font-style: normal;
    font-weight: 400;
    line-height: 22px; /* 137.5% */
}

.box-content .inner-b-content .social-icon {
    display: flex;
    align-items: center;
    gap: 15px;
}

@media screen and (max-width: 767px) {
    .container-biendao {
        margin-top: 50px;
    }

    .title-biendao {
        font-size: 30px;
        letter-spacing: normal;
    }

    .box-content .inner-b-content .name {
        font-size: 16px;
    }

    .box-content .inner-b-content .vudieu {
        font-size: 14px;
    }
}

.container-biendao-show {
    margin-block: 60px;
}

.container-biendao-show .name {
    color: #FFF;
    font-size: 40px;
    font-style: normal;
    font-weight: 700;
    line-height: 130%; /* 52px */
}

.teacher-thumbnail {
    height: 600px;
}

.teacher-thumbnail .image-cover, .teacher-thumbnail .box-image {
    /* height: 100%; */
    border-radius: 16px;
}

@media screen and (max-width: 767px) {
    .teacher-thumbnail {
        height: 400px;
    }
}