body {
    font-family: 'Hiragino Sans', 'Yu Gothic', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.logo {
    width: 120px;
    height: auto;
    max-width: 100%;
    border-radius: 20px;
}

.header-text h1 {
    margin: 0;
    font-size: 2.5rem;
}

.header-text p {
    margin: 0.5rem 0 0 0;
    font-size: 1.1rem;
    opacity: 0.9;
}

@media (min-width: 768px) {
    .header-content {
        flex-direction: row;
        gap: 2rem;
    }

    .header-text {
        text-align: left;
    }
}

.section {
    background: white;
    margin: 2rem 0;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.feature {
    padding: 1rem;
    background: #f0f8f0;
    border-radius: 6px;
    border-left: 4px solid #4CAF50;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: #333;
    color: white;
    margin-top: 3rem;
}