body {
    margin: 0;
}

/* ヘッダー */
.header {
    width: 100%;
    padding: 10px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    width: 120px;
    height: 40px;
    margin: 0;
}

ul {
    margin: 0;
    padding: 0;
}

.site-title img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

nav ul {
    display: flex;
    justify-content: space-between;
    width: 80%;
    list-style: none;
    gap: 20px;
}

/* メインビジュアル */
.main-visual img {
    width: 100%;
    max-width: 1920px;
    height: 800px;
    object-fit: cover;
    margin-bottom: 80px;
}

/* aboutコンテンツ */

.section-title {
    text-align: center;
    font-size: 32px;
    border-bottom: 1px solid black;
    width: 100px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 60px;
}

.content {
    width: 100%;
    display: flex;
    justify-content: center;
}

.content img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 100%;
    margin-right: 30px;
}

.text h3 {
    font-size: 16px;
    margin: 10px 0;
}

.text p {
    font-size: 14px;
}

/* bicycleコンテンツ */

.bicycle-title {
    text-align: center;
    font-size: 32px;
    border-bottom: 1px solid black;
    width: 120px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 60px;
    margin-top: 60px;
}

.bicycle-content ul {
    width: 100%;
    display: flex;
    justify-content: center;
    list-style: none;
}

.bicycle-content img {
    width: 230px;
    height: 150px;
    object-fit: cover;
    margin-right: 25px;
}

.bicycle-content h3 {
    text-align: center;
    font-size: 16px;
    margin: 10px 0;
}

.bicycle-content p {
    text-align: center;
    font-size: 14px;
}

/* フッター */

.footer p {
    text-align: center;
    font-size: 10px;
    margin: 60px 0;
}

/* レスポンシブ対応 */

@media screen and (max-width:670px) {
    .mainvisual img {
        height: calc(100vh-60px);
    }

    .content {
        flex-direction: column;
    }

    .content img {
        margin-right: 0;
    }
    
    .bicycle-content ul {
        flex-direction: column;
    }

    .bicycle-content li {
        width: 100%;
        margin-bottom: 30px;
    }
}