body {
    font-family: 'Noto Sans JP', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-sizing: border-box;
}

#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #ccc;
    border-top: 5px solid #007BFF;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

header.hero-section {
    text-align: center;
    padding: 50px 20px;
    background: linear-gradient(135deg, #007BFF, #6A1B9A);
    color: white;
    width: 100%;
}

header .logo {
    width: 150px;
    max-width: 100%;
}

section {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

section h2 {
    margin-top: 0;
}

ul {
    padding-left: 20px;
}

.contact-button {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    background: #007BFF;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.contact-button:hover {
    background: #0056b3;
}

footer {
    margin-top: auto;
    padding: 10px;
    background: #333;
    color: white;
    width: 100%;
    text-align: center;
}

@media (max-width: 768px) {
    body {
        padding: 0 10px;
    }

    section {
        padding: 15px;
    }
}