* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
    color: #333;
    line-height: 1.8;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #469B8A, #2D7A6B);
    color: white;
    text-align: center;
    padding: 80px 20px;
}
.hero h1 {
    font-size: 3rem;
    margin-bottom: 16px;
}
.hero .logo {
    height: 60px;
    margin-bottom: 16px;
}
.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 500px;
    margin: 0 auto 32px;
}
.badge {
    display: inline-block;
    height: 54px;
}

/* Header (sub pages) */
header {
    background: linear-gradient(135deg, #469B8A, #2D7A6B);
    color: white;
    text-align: center;
    padding: 40px 20px;
}
header h1 { font-size: 1.8rem; }
header a { color: white; opacity: 0.8; text-decoration: none; font-size: 0.9rem; }
header a:hover { opacity: 1; }

/* Features */
.features {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}
.features h2 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 40px;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 32px;
}
.feature-card {
    text-align: center;
    padding: 24px;
}
.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}
.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.feature-card p {
    font-size: 0.9rem;
    color: #666;
}

/* Premium */
.premium {
    background: #f8f8f8;
    padding: 60px 20px;
    text-align: center;
}
.premium h2 {
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.premium p {
    color: #666;
    margin-bottom: 24px;
}
.premium-list {
    list-style: none;
    max-width: 400px;
    margin: 0 auto;
    text-align: left;
}
.premium-list li {
    padding: 8px 0;
    font-size: 1rem;
}
.premium-list li::before {
    content: "\2728 ";
}

/* Content (sub pages) */
.content {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}
.content h2 {
    font-size: 1.3rem;
    margin: 32px 0 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid #469B8A;
}
.content h2:first-of-type { margin-top: 0; }
.content p, .content ul { margin-bottom: 16px; }
.content ul { padding-left: 24px; }
.content li { margin-bottom: 6px; }
.updated { color: #888; font-size: 0.85rem; margin-bottom: 32px; }

/* FAQ */
details {
    margin-bottom: 12px;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 16px;
}
summary {
    font-weight: bold;
    cursor: pointer;
}
details p { margin-top: 12px; margin-bottom: 0; }

/* Contact */
.contact-box {
    background: #eef7f5;
    border: 1px solid #b8ddd5;
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
    text-align: center;
}
.contact-box a {
    display: inline-block;
    background: #469B8A;
    color: white;
    text-decoration: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-weight: bold;
    margin-top: 12px;
}
.contact-box a:hover { background: #2D7A6B; }

/* Footer */
footer {
    background: #f7f7f7;
    text-align: center;
    padding: 32px 20px;
    font-size: 0.85rem;
    color: #888;
}
footer a {
    color: #469B8A;
    text-decoration: none;
    margin: 0 12px;
}
footer a:hover { text-decoration: underline; }
.footer-links { margin-bottom: 12px; }