body {
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    padding: 2rem;
    background-color: #f5f5f5;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.site-header {
    width: 100%;
    max-width: 1200px; /* メインコンテンツの最大幅と合わせる */
    background-color: #ffffff;
    padding: 2rem 2.5rem;
    margin-bottom: 3rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
    text-align: left;
}

.site-header h1 {
    color: #333; 
    font-size: 2.2rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    border-bottom: none;
    letter-spacing: 0.5px;
}

.site-header p {
    font-size: 1.1rem;
    color: #666;
    margin: 0;
}

.service-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
    margin-bottom: 2rem;
}

.service-card {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.card-content h2 {
    margin-top: 0;
    font-size: 1.5rem;
    color: #333;
}

.card-content p {
    font-size: 1rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 1.5rem;
}

.btn {
    display: block;
    background-color: #C7000A;
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    text-align: center;
    text-decoration: none;
    font-weight: 700;
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #a60008; 
}

.site-footer {
    margin-top: auto;
    padding-top: 2rem;
    text-align: center;
    color: #888;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .site-header h1 {
        font-size: 2rem;
    }
}