/* 基本スタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.logo {
    height: 40px;
}

/* ヒーローセクション */
.hero {
    text-align: center;
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.banner {
    max-width: 100%;
    height: auto;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

/* 機能セクション */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #2c3e50;
}

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

.feature-item {
    text-align: center;
    padding: 2rem;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.feature-item h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

/* サポートセクション */
.support {
    text-align: center;
    padding: 4rem 0;
    background-color: #f8f9fa;
}

.support h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    margin-top: 1rem;
    transition: background-color 0.3s;
}

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

/* フッター */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem 0;
}

footer nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

footer nav a {
    color: #fff;
    text-decoration: none;
}

footer nav a:hover {
    text-decoration: underline;
}

footer p {
    text-align: center;
    font-size: 0.9rem;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    footer nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
}