body {
    padding-top: 100px;
}

.mv img {
    filter: blur(4px);
    object-position: bottom;
    object-fit: cover;
    width: 100%;
    height: 435px;
}

.main-visual {
    position: relative;
    width: 100%;
    height: 400px;
    /* MVの高さを調整 */
    background-image: url(/img/MV13.jpg);
    /* 背景画像 */
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    margin-bottom: 50px;
}

h3 {
    text-align: center;
    color: #ff4081;
    font-size: 28px;
    margin: 0 0 15px;
}



h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: white;
}

h5 {
    font-size: 16px;
}

.main-visual h2 {
    color: #fff;
    /* テキストカラーを白に設定 */
    font-size: 2.5em;
    /* フォントサイズを調整 */
    margin: 0;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    /* 背景に半透明の黒を設定 */
    border-radius: 10px;
}

.sitemap a {
    color: #fff;
}

.topbtn {
    text-align: center;
    margin-bottom: 20px;
}

.topbtn a{
    text-decoration: unset;
    color: #fff;
    padding: 9px 20px 11px;
    background-color: #ff4081;
    border-radius: 5px;
}

a {
    text-decoration: none;
    color: #ff4081;
}


@media (max-width: 768px) {
    h3 {
        font-size: 24px;
    }

    .contents {
        padding: 15px;
        margin-bottom: 50px;
    }


    .mv img {
        filter: blur(3px);
        object-fit: cover;
        height: 200px;
    }

    .main-visual {
        height: 300px;
        margin-bottom: 50px;
    }

    .main-visual h2 {
        font-size: 2em;
        padding: 15px 30px;
    }

}

@media (max-width: 480px) {
    .main-visual {
        height: 150px;
        margin-bottom: 50px;
    }

    .main-visual h2 {
        font-size: 1.5em;
        padding: 10px 20px;
    }
}

@media  (min-width:769px) and (max-width: 1024px){
    .header-container{
    width: 880px;
    }
}