body {
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

#toIndex {
    text-decoration: none;
    color: #444;
}

h1 { margin: 0; font-size: 1.3rem; color: #444; }

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: #666;
    font-weight: bold;
    padding: 5px 0;
}

nav a:hover, nav a.active {
    color: #007bff;
    border-bottom: 2px solid #007bff;
}

.hero {
    background: linear-gradient(135deg, #007bff, #00d4ff);
    color: white;
    text-align: center;
    padding: 60px 0;
    margin-bottom: 40px;
}

.product-card, .page-content {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    margin-bottom: 40px;
    padding: 40px;
}

.policy-text h3 {
    margin-top: 30px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    color: white;
    margin-top: 20px;
}

.btn-primary { background-color: #007bff; }
.btn-warning { background-color: #e0a800; }

footer {
    text-align: center;
    padding: 30px 0;
    color: #999;
    font-size: 0.9rem;
    background-color: #eee;
    margin-top: 40px;
}

.footer-nav a {
    color: #666;
    text-decoration: none;
    margin: 0 10px;
}