* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    background-color: #ffffff;
    color: #333333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    max-width: 800px;
    width: 100%;
    text-align: center;
}

.logo {
    margin-bottom: 40px;
}

.logo img {
    max-width: 100%;
    height: auto;
    width: 400px;
}

.tagline {
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #666666;
    margin-bottom: 40px;
    font-weight: 300;
}

.contact-info {
    margin-bottom: 30px;
}

.contact-info a {
    color: #333333;
    text-decoration: none;
    font-size: 16px;
    display: block;
    margin: 15px 0;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: #666666;
}

.phone {
    font-size: 18px;
    font-weight: 500;
    margin-top: 20px;
}

.social-links {
    margin: 30px 0;
}

.social-links a {
    display: inline-block;
    margin: 0 10px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.social-links a:hover {
    opacity: 1;
}

.social-links img {
    width: 30px;
    height: 30px;
}

footer {
    margin-top: 60px;
    font-size: 12px;
    color: #999999;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .logo img {
        width: 300px;
    }

    .tagline {
        font-size: 12px;
        letter-spacing: 1.5px;
    }

    .contact-info a {
        font-size: 14px;
    }

    .phone {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .logo img {
        width: 250px;
    }

    .tagline {
        font-size: 11px;
        margin-bottom: 30px;
    }

    .contact-info a {
        font-size: 13px;
    }

    footer {
        margin-top: 40px;
    }
}