main {
    margin-top: 80px; 
    margin-bottom: 2rem;
    margin-left: auto;
    margin-right: auto;
}
body {
    font-family: sans-serif;
    background-color: #f6f8fb;
    margin: 0;
}
h1 {
    font-size: 2.5rem;
    text-align: center;
    margin: 2rem 0;
}
/* --- 選択カードエリア --- */
.container {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 40px;
    padding: 0 20px;
    box-sizing: border-box;
    flex-wrap: wrap;
}

.card {
    background: white;
    padding: 2rem;
    flex: 1 1 320px;
    max-width: 500px;
    border-radius: 20px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.15);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.card p {
    font-size: 2rem;
    color: #444;
    margin-bottom: 3rem;
}

.btn2 {
    display: inline-block;
    background-color: #0b3d3a;
    color: white;
    padding: 2.4rem 2.4rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}
/* --- フォームエリア --- */
#contact-form {
    background: white;
    width: 100%;
    height: auto;
    max-width: 800px;
    margin: 0 auto;
    margin-top: 3rem;
    padding: 2rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    display: block;
    border-radius: 20px;
}
#contact-form iframe {
    width: 100%;
    height: 610px;
    display: block;
    margin: 0 auto;
}
@media (max-width: 700px) {
    .container {
    flex-direction: fixed;
    align-items: center;
    gap: 20px;
    }
    .card {
    max-width: 90%;
    }
    #contact-form {
    background: white;
    width: 70%;
    height: auto;
    max-width: 800px;
    margin: 0 auto;
    margin-top: 3rem;
    padding: 2rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    display: block;
    border-radius: 20px;
    }
    #contact-form iframe {
    width: 110%;
    height: 800px;
    }
    .card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    }
    .card p {
    font-size: 1.5rem;
    color: #444;
    margin-bottom: 3rem;
    }
    .btn2 {
    display: inline-block;
    background-color: #0b3d3a;
    color: white;
    padding: 2.4rem 2.4rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.9rem;
    }
}