/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* ヘッダー */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #4CAF50;
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: #4CAF50;
}

.btn-nav {
    background-color: #4CAF50;
    color: #fff !important;
    padding: 10px 25px;
    border-radius: 25px;
    transition: background-color 0.3s;
}

.btn-nav:hover {
    background-color: #45a049;
}

/* メインビジュアル */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 180px 20px 120px;
    text-align: center;
    margin-top: 70px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.btn-primary {
    display: inline-block;
    background-color: #4CAF50;
    color: #fff;
    text-decoration: none;
    padding: 18px 50px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
}

.btn-secondary {
    display: inline-block;
    background-color: #fff;
    color: #667eea;
    text-decoration: none;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: bold;
    border: 2px solid #667eea;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background-color: #667eea;
    color: #fff;
}

/* セクション共通 */
section {
    padding: 80px 20px;
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.section-description {
    text-align: center;
    font-size: 18px;
    color: #666;
    line-height: 1.8;
}

/* サービス概要 */
.about {
    background-color: #f9f9f9;
}

/* 特徴 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.feature-card {
    background-color: #fff;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333;
}

.feature-description {
    color: #666;
    line-height: 1.8;
}

/* 料金プラン */
.pricing {
    background-color: #f9f9f9;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    background-color: #fff;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: scale(1.03);
}

.pricing-card.featured {
    border: 3px solid #4CAF50;
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.2);
}

.featured-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #4CAF50;
    color: #fff;
    padding: 8px 25px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.pricing-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
}

.pricing-price {
    margin-bottom: 30px;
}

.price-amount {
    font-size: 48px;
    font-weight: bold;
    color: #4CAF50;
}

.price-currency {
    font-size: 24px;
    color: #666;
}

.price-period {
    font-size: 18px;
    color: #999;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 12px 0;
    color: #666;
    border-bottom: 1px solid #eee;
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* 使い方 */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
}

.step-description {
    color: #666;
    line-height: 1.8;
}

/* CTA */
.cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-align: center;
}

.cta-title {
    font-size: 36px;
    margin-bottom: 40px;
    line-height: 1.4;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: #fff;
    color: #333;
    text-decoration: none;
    padding: 15px 35px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.download-icon {
    font-size: 24px;
}

/* フッター */
.footer {
    background-color: #333;
    color: #fff;
    padding: 40px 20px;
    text-align: center;
}

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    color: #4CAF50;
    margin-bottom: 15px;
}

.footer-copy {
    color: #999;
    font-size: 14px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 28px;
    }

    .features-grid,
    .pricing-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .cta-title {
        font-size: 28px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-download {
        width: 100%;
        max-width: 300px;
    }
}